JP7618500B2 - Connecting member and threading method - Google Patents

Description

The present invention relates to a connecting member that connects multiple winding bobbins for winding threads, and a threading method.

The winding device for winding threads disclosed in Patent Documents 1 and 2 is configured to be able to switch the number of threads that can be simultaneously wound around a paper tube (winding bobbin) held by a bobbin holder. The bobbin holder can, for example, be attached to and detached from two winding bobbins (hereinafter, winding bodies) connected in the axial direction of the winding bobbin by a connecting member. This allows the winding device to wind two threads around the winding bodies. The end of one of the two threads 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 threads can be held, for example, by being sandwiched in the gap between the end face of the other winding bobbin and the connecting member.

When two threads are wound on the winding body in the winding device, the two threads supplied from the upstream side in the thread running direction are sucked and held by, for example, two suction mouths. The two running threads are moved radially inward toward the boundary between the rotating winding bobbin and the bobbin holder (or the connecting member) by an operator or the automatic threading device described in Patent Document 2. When the thread is caught in the gap between the winding bobbin and the bobbin holder (or the connecting member), the part of the thread upstream of the winding body in the thread running direction is wound and held near the gap. In addition, the part of the thread downstream of the winding body in the thread running direction is naturally cut by, for example, tension and sucked and removed by the suction mouth. In this way, the end of the thread is held in the gap between the winding bobbin and the bobbin holder (or the connecting member), and winding of the thread onto the winding body can begin.

JP 2013-35640 A JP 2013-23385 A

In recent years, as it has become possible to produce thinner threads than before, the following problems have become apparent when capturing the thread in the gap between the winding bobbin and the connecting member. That is, even if a thin thread is caught in the gap between the winding bobbin and the connecting member, it is difficult to hold it firmly in the gap and it is likely to fall out of the gap. In such a situation, the thread may become unstable as it becomes taut and slack during travel. If the slackness of the thread propagates upstream in the thread travel direction, the thread arranged upstream in the thread travel direction may not be able to travel normally. In addition, there is also a risk that the thin thread will not be captured in the gap between the winding bobbin and the connecting member in the first place, resulting in a failed threading operation.

The object of the present invention is to reliably capture the thread without slackening it when threading the thread onto a winding bobbin attached to a connecting member.

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 comprises 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, characterized in that the base portion has a pair of stopper portions arranged between the pair of mounting portions in the axial direction and restricting the movement of the two winding bobbins in the axial direction, a guide surface arranged between the pair of stopper portions in the axial direction and guiding the running yarn radially inward of the base portion, and a capturing claw that captures the yarn guided radially inward by the guide surface.

For the sake of convenience, the structure formed by connecting two winding bobbins and a connecting member is called a winding body. In the present invention, the running yarn is brought close to the rotating winding body, and the catching claw of the connecting member is hooked on the yarn, so that the yarn can be reliably caught by being wound into the catching claw. Here, if resistance is unintentionally applied to the yarn by other parts of the connecting member before the yarn reaches the catching claw, the yarn may not run smoothly and may become slack. In this regard, in the present invention, the guide surface can smoothly guide the yarn radially inward. Therefore, the yarn can be allowed to reach the catching claw while preventing unintentional application of resistance to the yarn. Therefore, the yarn can be reliably caught without slackening.

The connecting member of the second invention is characterized in that, in the first invention, the catching claw has a receiving surface formed to face at least one side in the circumferential direction of the base portion, and a protruding portion that protrudes beyond the receiving surface toward at least the one side in the circumferential direction and prevents the thread received by the receiving surface from falling off during the thread running.

In the present invention, when the winding body rotates to one side in the circumferential direction, the yarn can be captured 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 makes it possible to prevent the yarn from falling into an unstable state in which it becomes taut or slack due to the capturing claw. Furthermore, the protrusion can prevent the yarn received by the receiving surface from moving radially outward and falling off the base portion. Therefore, the yarn can be stably captured and held while it is running.

The connecting member of the third invention is the first or second invention, characterized in that 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.

In the present invention, the guide slits allow the yarn to be guided radially inward reliably and stably.

The connecting member of the fourth invention is characterized in that, in any one of the first to third inventions, the guide surface faces at least one side in the axial direction, the capture 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 that faces at least the other side in the axial direction and can guide the running yarn inward in the radial direction, and a preliminary capture claw that is arranged on the one side of the guide surface in the axial direction and protrudes at least to the other side in the circumferential direction.

In the present invention, when the connecting member is rotated 180 degrees in a plane parallel to the axial direction, the preliminary guide surface can function as a guide surface, and the preliminary capture claw can function as a capture claw. This allows the yarn to be captured normally even if the winding body is attached to the yarn winding device in a direction opposite 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 eliminates the hassle that would occur if the orientation of the connecting member had to be considered.

The connecting member of the fifth invention is the fourth invention, characterized in that the preliminary capture claw is disposed at a different position in the circumferential direction from the capture claw.

When the capture claw and the preliminary capture claw are arranged in a position where all or part of them overlap in the circumferential direction, there is a risk that the base portion will become large in the axial direction. If the capture claw and the preliminary capture claw are made small in the axial direction to avoid this, there is a risk that they will fail to capture and/or hold the thread. In the present invention, the capture claw and the preliminary capture claw can be made large while preventing the base portion from becoming large in the axial direction, compared to when the capture claw and the preliminary capture claw are arranged in a position where all or part of them overlap in the circumferential direction. Therefore, it is possible to both prevent the connecting member from becoming large and prevent failure to capture and/or hold the thread.

The connecting member of the sixth invention is characterized in that, in any of the first to fifth inventions , the guide surface and the capturing claw are positioned radially inwardly of the radially outermost ends of the pair of stopper portions.

If the guide surface and/or the catch claw are positioned radially outward from the stopper portion, the guide surface and/or the catch claw may protrude radially outward from the two bobbins. In such a case, for example in a yarn winding device, it may become 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 catch 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 greater than the outer diameter of a pair of stopper portions to the connecting member, the winding body can be handled in the same way as a single winding bobbin.

The seventh aspect of the connecting member is the sixth aspect of the invention, in which 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.

In this invention, the inclined surface allows the running yarn to be smoothly guided to the guide surface.

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

In the present invention, the thread is captured by the capturing claws, so that the thread can be reliably captured and held without slackening. This improves the success rate of threading.

1 is a side view of a false twisting machine including a winding device according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing a false twisting machine deployed along a yarn path. FIG. 2A is an explanatory diagram showing a single winding bobbin and its surrounding structure, and FIG. 2B is an explanatory diagram showing a winding body having two winding bobbins and its surrounding structure. 4A and 4B are schematic diagrams of the threading device and its surroundings. 5A to 5C are explanatory diagrams showing the operation of the threading device when threading a thread onto a winding bobbin. FIG. 4 is a perspective view of a base portion of the connecting member. 7 is a view taken along the arrow VII in FIG. 6 , showing the base portion from a direction perpendicular to the axial direction. 8 is a view taken along the arrow VIII in FIG. 6 , showing the base portion from a direction perpendicular to the axial direction. 8A is an enlarged view of a portion of FIG. 7, and FIG. 8B is an enlarged view of a portion of FIG. 8A is a cross-sectional view taken along line X(a)-X(a) in FIG. 8, and FIG. 8B is a cross-sectional view taken along line X(b)-X(b) in FIG. 5A to 5C are explanatory diagrams showing how a yarn is captured by a capturing claw. 5A to 5C are explanatory diagrams showing how a yarn is captured and held by a capturing claw.

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.

(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 deployed along the path (yarn path) of the yarn Y.

The false twisting machine 1 is configured to be able to false twist yarn Y made of synthetic fibers. The false twisting machine 1 includes a yarn supplying section 2, a processing section 3, and a winding section 4. The yarn supplying section 2 is configured to be able to supply yarn Y. The processing section 3 is configured to pull out yarn Y from the yarn supplying section 2 and false twist it. The winding section 4 is configured to wind yarn Y processed by the processing section 3 onto a winding bobbin B1 or a winding body 100 (see Figures 1, 2, and 3(b). Details will be described later). Each of the components of the yarn supplying section 2, processing section 3, and winding section 4 is arranged in a plurality of 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 section 2 through the processing section 3 to the winding section 4 is arranged (see Figure 2).

The yarn supplying section 2 has a creel stand 7 that holds multiple yarn supply packages Ps, and supplies multiple yarns Y to the processing section 3. The processing section 3 is configured to pull out multiple yarns Y from the yarn supplying section 2 and process them. The processing section 3 is configured to have 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 yarn doubling device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20 arranged in order from the upstream side in the yarn running direction. The winding section 4 has multiple winding devices 21. Each winding device 21 winds the yarn Y false twisted in the processing section 3 onto a winding bobbin B1 or a winding body 100 to form one or multiple winding packages Pw.

The false twisting machine 1 has a main machine base 8 and a winding table 9 arranged at an interval in the width direction of the machine base. The main machine base 8 and the winding table 9 are arranged so as to extend to approximately the same length in the longitudinal direction of the machine base. The main machine base 8 and the winding table 9 are arranged so as to face each other in the width direction of the machine base. The false twisting machine 1 has a unit called a span, which includes a set of the main machine base 8 and the winding table 9. In one span, each device is arranged so that multiple yarns Y running in a line in the longitudinal direction of the machine base can be false twisted simultaneously. In the false twisting machine 1, this span is arranged symmetrically on the left and right of the page with the center line C in the width direction of the main machine base 8 as the axis of symmetry (the main machine base 8 is common to the left and right spans). In addition, multiple spans are arranged in the longitudinal direction of the machine base.

(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 supply unit 2 and send it to the first heating device 13. The first feed roller 11 is configured to be able to send, for example, two yarns Y to the first heating device 13, but is not limited thereto. 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 sent from the first feed roller 11. The first heating device 13 is configured to be able to heat, for example, four yarns Y as shown in Fig. 2, but is not limited thereto. 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 yarns Y as shown in Fig. 2, but is not limited thereto. The false twist 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 twist device 15 is, for example, but not limited to, a so-called disk friction type false twist device. The second feed roller 16 is configured to feed the yarn Y processed by the false twist 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 stretched between the first feed roller 11 and the second feed roller 16.

The yarn doubling device 17 is configured to be able to doubling the yarn Ya and the yarn Yb to form the yarn Yc. The yarn doubling device 17 can, for example, doubling 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 yarn doubling device 17 has two interlace nozzles 31 and 32 (see FIG. 2). The yarn doubling device 17, for example, injects air onto the yarn Ya and the yarn Yb (see the left part of the paper in FIG. 2) passing through the inside of the interlace nozzle 31, and doubling the yarn Ya and the yarn Yb by air interlacing (interlacing) that entangles them with an air flow to form the yarn Yc. The yarn doubling device 17 can also guide the two yarns Y as they are downstream in the yarn running direction without doubling the yarn Ya and the yarn Yb. In this case, yarn Ya passes through the inside of interlace nozzle 31, and yarn Yb passes through the inside of interlace nozzle 32 (see the right side of the page in Figure 2).

The third feed roller 18 is configured to send 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 send two yarns Y to the second heating device 19, for example, as shown in FIG. 2, but is not limited to this. The conveying speed of the yarn Y by the third feed roller 18 is slower than the conveying speed of the yarn Y by the second feed roller 16. For this reason, 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 sent from the third feed roller 18. The second heating device 19 extends along the vertical direction, and one is provided for each span. The fourth feed roller 20 is configured to send the yarn Y heated by the second heating device 19 to the winding device 21. The fourth feed roller 20 is configured to be able to feed two strands of yarn Y to the winding device 21, as shown in FIG. 2, for example, but is not limited to this. The speed at which the fourth feed roller 20 conveys the yarn Y is slower than the speed at which the third feed roller 18 conveys the yarn Y. Therefore, the yarn Y is relaxed between the third feed roller 18 and the fourth feed roller 20.

In the processing section 3 configured as above, the yarn Y stretched 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 running direction. The yarn Y to which the twist is imparted while being stretched 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 running direction, but the above heat setting maintains the yarn Y in a wavy false twisted state. The two false-twisted yarns Y (yarn Ya and yarn Yb) are loosened between the second feed roller 16 and the third feed roller 18, and are then combined by the yarn combining device 17, or are guided downstream in the yarn running direction without being combined. Furthermore, the yarn Y is thermally fixed 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.

(Configuration of the winding section)
The configuration of the winding section 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 a plurality of winding bobbins Bw (winding bobbins B2) and a connecting member 60 described later, and its peripheral configuration. The winding section 4 has a plurality of winding devices 21. As described in JP-A-2013-35640, 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 a single mode or a multiple mode as an operation mode. The single mode is an operation mode in which one yarn Yc is wound onto one winding bobbin Bw (winding bobbin B1). The multiple mode is an operation mode in which two yarns Ya and Yb are wound onto two winding bobbins Bw (winding bobbins B2). The winding device 21 includes 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 a 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 a plurality of winding devices 21 may be provided.

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 on each winding device 21, lined up along the longitudinal direction of the machine (see FIG. 2). For example, when guiding a single yarn Y that has been combined by the yarn doubling device 17, the yarn Y is hung on the central fulcrum guide 41 of the three fulcrum guides (see the left side of the paper in FIG. 2). Also, when guiding two yarns Y that have been sent as is without being combined, the yarn Y is hung on the two fulcrum guides 41 at both ends of the three fulcrum guides 41 (see the right side of the paper in FIG. 2).

The traverse device 42 is configured to be able to traverse the yarn Y by, for example, a traverse guide 45 attached to an endless belt (not shown) that is driven reciprocally by a motor (not shown). The number of traverse guides 45 attached to the endless belt can be changed according to the number of yarns Y to be traversed. For example, in the traverse device 42 that traverses the yarn Y that has been combined into one by the yarn doubling device 17, one traverse guide 45 is provided (see the left part of the paper in FIG. 2). In addition, in the traverse device 42 that traverses two yarns Y that have been sent as they are without being combined, two traverse guides 45 are provided (see the right part of the paper in FIG. 2). The movement range of the traverse guide 45 can be changed according to the number of yarns Y to be traversed. Information regarding 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.

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, the winding body 100 will be outlined. The winding body 100 has two winding bobbins Bw (winding bobbins B2) and a connecting member 60. In the axial direction (hereinafter simply referred to as the axial direction) of the winding bobbins Bw mounted on the cradle 43, 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.

The connecting member 60 is, for example, a resin member. The connecting member 60 is configured to connect two winding bobbins B2 in an 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 sides of the base portion 61 in the axial direction. The base portion 61 is arranged in the center of the connecting member 60 in the axial direction. The base portion 61 is arranged so as to be sandwiched between the two winding bobbins B2 (winding bobbins B2a, B2b) in the axial direction. For convenience of explanation, the right side of the paper in Figures 3 (a) and (b) is one side in the axial direction, and the left side of the paper is 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 a single winding bobbin B1. Further details of the connecting member 60 will be described later.

The cradle 43 is configured so that the winding bobbin B1 can be attached and detached, and the winding body 100 can be attached and detached. As shown in Figures 3(a) and (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 arms 43a, 43b of the cradle 43. Each bobbin holder 47 has an insertion portion 48 that is inserted into the winding bobbin B1 or the winding bobbin B2, and a pressing portion 49 that presses the insertion portion 48 in the axial direction. The pressing portion 49 is a portion having a larger diameter than the winding bobbin B1 and 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. A notch (not shown) is formed in the pressing portion 49 on one side in the axial direction to guide the yarn Y radially inward during a threading operation (described later) (see, for example, JP 2013-35640 A).

A contact roller 46 is disposed near the cradle 43. The contact roller 46 contacts 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)) to apply contact pressure. 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.

The winding bobbin B1 or the winding body 100 supported by the cradle 43 is rotated, for example, by a motor (not shown). In such a configuration, the 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.

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 the winding body 100). The control unit 44 is configured to be able to change the setting related to the number of yarns Y to be wound on 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 on 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 on each of two winding bobbins B2 (see the right part of the page in FIG. 2).

In the winding section 4 configured as described above, the yarn Y sent from the fourth feed roller 20 described above is wound onto the winding bobbin B1 (or winding bobbin B2) by each winding device 21 to form a winding package P1 (or winding package P2). When two yarns Y are combined by the yarn combining device 17, the operation mode of the corresponding winding device 21 is set to the single mode. When two yarns Y are not combined but are guided directly downstream in the yarn running direction, 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.

(Threading device)
In this embodiment, a threading device 50 is provided near the winding device 21 (see Figs. 4(a), (b) and Figs. 5(a) to (c)). Fig. 4(a) is a view of the threading device 50 seen from above. Fig. 4(b) is a view of the threading device 50 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 the winding bobbin B2.

The threading device 50 is configured to finish winding the yarn Y onto the winding body 100 mounted on the cradle 43, and to thread the newly mounted winding body 100 on 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 hook 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 hook the yarn Y (thread Yb) on the other axial side onto the winding bobbin B2 (winding bobbin B2b) on the other axial side. As shown in Figures 4(a) and (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 Figure 4(a)). Each threading unit 51 is configured to be able to perform the operation of finishing winding the thread Y onto the winding bobbin B2 and the operation of threading the thread onto a new winding bobbin B2.

The suction mouth 52 is for temporarily sucking and holding the running yarn Y, which has been false twisted by the processing unit 3, after the winding of the yarn Y onto a certain winding body 100 is completed, until the threading onto the next winding body 100 is completed. The suction mouth 52 is arranged outside the area where the yarn Y is traversed by the traverse guide 45 (see the yarn Y shown by the solid line and the two-dot chain line in FIG. 4(a)). Each suction mouth 52 is arranged outside the range where the yarn Y wound on the corresponding winding bobbin B2 is traversed (in this embodiment, on one side in the axial direction). The yarn shifting arm 53 is configured to move the yarn Y traversed by the traverse guide 45 to one side in the axial direction. The yarn shifting arm 53 is rotatable about a rotation shaft 53a extending in a direction substantially perpendicular to the axial direction. A guide member 58 capable of guiding the yarn Y to the vicinity of the entrance of the suction mouth 52 is provided near the rotation shaft 53a. 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 placement arm 54 is configured to position the yarn Y sucked and held by the suction mouth 52 almost directly above the winding body 100 (see, for example, FIG. 5(c)). The yarn placement arm 54 of the yarn hooking portion 51a and the yarn placement arm 54 of the yarn hooking portion 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 arm 55 of the yarn hooking portion 51a and the yarn pressing arm 55 of the yarn hooking portion 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 pinching 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 on these components, see, for example, JP 2013-23385 A.

The operation of threading by the threading device 50 will be briefly described with reference to Figures 5(a) to (c). For example, the yarn Y is wound around two winding bobbins B2 of the winding body 100 attached to the cradle 43 to form two winding packages P2 (see Figure 5(a)). At this time, the yarn shifting arm 53 rotates from the retracted position to the yarn shifting position, so that 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 is cut by the cutter 57. As a result, winding of the yarn Y onto the winding body 100 attached to the cradle 43 is completed. Almost at the same time, the yarn Y upstream of the cutter 57 in the yarn running direction is sucked and captured by the suction mouth 52 (see Figure 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, for example by an autodoffer (not shown), and a new winding body 100 with an empty winding bobbin B2 is attached to the cradle 43.

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 FIG. 5(c) and FIG. 3(b)). More specifically, the yarn Y (yarn Ya) on one side in the axial direction 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 described below, the yarn Y on the other side in the axial direction (yarn Yb) is captured by the connecting member 60 and can be wound onto the rotating winding bobbin B2b.

At least some of the components of the threading unit 51b may be configured to be removable from the threading device 50. As a result, when the operation mode of the winding device 21 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.

Here, the conventional connecting member (not shown) was configured to pinch and capture the thread Yb in the gap formed between the connecting member and the winding bobbin B2b. However, in recent years, the following problem has become apparent due to the fact that it has become possible to manufacture threads Y that are thinner than before. That is, even if the thin thread Y is once pinched in the gap between the conventional connecting member and the winding bobbin B2b, it is difficult to hold it firmly in the gap and it is easy to fall out of the gap. In such a situation, the thread Y may become unstable and tense during running. If the slackness of the thread Y propagates to the upstream side in the thread running direction, the thread Y arranged upstream in the thread running direction may not be able to run normally. In addition, the thin thread Y may not be captured in the gap between the winding bobbin B2b and the conventional connecting member in the first place, and threading may fail. In this embodiment, in order to reliably capture the thread Y without loosening it, the connecting member 60 has the configuration described below. Note that such a problem does not occur when the thread Y is captured in the gap between the winding bobbin B2a and the bobbin holder 47. The inventors believe that this may be related to the yarn Y being captured by the notch in the bobbin holder 47 described above.

(Detailed configuration of connecting member)
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 viewed from a direction perpendicular to the axial direction, as viewed from an arrow VII in Fig. 6. Fig. 8 is a view of the base portion 61 as viewed from a direction perpendicular to the axial direction, as viewed from an arrow VIII in Fig. 6. 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 two-dot chain lines.

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

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

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 capture claw 72. When the connecting member 60 is positioned in the correct direction, the base portion 61 is configured to guide the running yarn Y (yarn Yb) radially inward by the guide slit 71, and further to capture the yarn Yb by the capture claw 72.

The pair of stopper portions 66 (stopper portions 67, 68) are configured to restrict the 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 from 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, generally truncated cone-shaped, and the outer diameter becomes smaller toward the other side in the axial direction (i.e., the further away from the end of the base portion 61 in the axial direction). The stopper portion 68 (one of the pair of stopper portions of the present invention) is formed at the other end of the base portion 61 in the axial direction. The stopper portion 68 is located radially outward from the end of the second mounting portion 64 in the axial direction. The stopper portion 68 has an inclined surface 68a. The inclined surface 68a is generally frustum-shaped, and 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 that is curved when viewed from a direction perpendicular to the axial direction, for example.

The guide slit 71 (see Figs. 7 to 10(b)) is a slit for guiding the yarn Yb radially inward. The guide slit 71 is formed in the inner part (approximately 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 Figs. 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 substantially L-shape . More specifically, as shown in Fig. 10(a), for example, the radial outer part of the guide surface 73 extends in the circumferential direction. The circumferential one side part of the radial outer part of the guide surface 73 has a gap between it and the bottom surface 75 in the radial direction. The circumferential other side part of the guide surface 73 extends from the radial outer side to the radial inner side, and is connected to the circumferential other side part of the bottom surface 75. The guide surface 73 is formed in a part in the circumferential direction. The guide surface 73 is connected to the inclined surface 68a and is disposed inside the inclined surface 68a in the radial direction (see FIG. 10(a)). In other words, the guide surface 73 is disposed radially inward from the outermost end in the radial direction of the pair of stopper portions 66. The guide surface 73 is formed so as to extend inward from the capturing claws 72 in the radial direction. The opposing surface 74 faces the other side in the axial direction and is disposed so as to face the guide surface 73 in the axial direction (see FIG. 8 and FIG. 9(b)). The opposing surface 74 is formed in a roughly crescent shape (see FIG. 10(b)). The opposing surface 74 is connected to the inclined surface 67a and is disposed inside the inclined surface 67a in the radial direction (see FIG. 10(b)). In the axial direction, between the guide surface 73 and the opposing surface 74, a bottom surface 75 is formed that connects the radial inner end of the guide surface 73 and the radial 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 generally linear. Alternatively, the bottom surface 75 may be slightly curved at both ends as shown in Figures 10(a) and 10(b).

The capture 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 capture claw 72 is arranged, for example, on the other side of the guide surface 73 in the axial direction. The capture claw 72 is arranged, for example, at a position that at least partially overlaps with the stopper portion 68 in the axial direction. The capture claw 72 is arranged, for example, at the end position on one side of the guide surface 73 in the circumferential direction. The capture claw 72 has, for example, a receiving surface 76 and a protruding portion 77. The receiving surface 76 is configured to receive the yarn Yb while it is running. The receiving surface 76 faces, for example, at least one side in the circumferential direction. The protruding portion 77 is configured to prevent the yarn Yb received by the receiving surface 76 from falling off the receiving surface 76. The protruding portion 77 is, for example, a protrusion that protrudes toward one side in the circumferential direction from the receiving surface 76. The protruding portion 77 is arranged on one side of the receiving surface 76 in the axial direction. The protrusion 77 has, for example, a substantially planar side surface 77a (see Figures 9(a) and (b)) facing the other side in the axial direction and one side in the circumferential direction.

In addition, the base portion 61 is configured to be able to capture the yarn Yb even when the connecting member 60 is disposed in a direction opposite to the normal direction (i.e., in a plane parallel to the axial direction, the connecting member 60 is rotated 180 degrees from the normal direction). As shown in FIG. 8 and FIG. 10B, the base portion 61 has a preliminary guide slit 81 and a preliminary capture claw 82. The preliminary guide slit 81 and the preliminary capture claw 82 are disposed in positions different from the guide slit 71 and the capture claw 72 in the circumferential direction. More specifically, the preliminary guide slit 81 and the preliminary capture claw 82 are disposed in positions approximately 180 degrees away from the positions where the guide slit 71 and the capture claw 72 are formed in the circumferential direction (see FIG. 10A and FIG. 10B). When viewed from a predetermined direction perpendicular to the axial direction, the preliminary guide slit 81 and the preliminary capture claw 82 are formed to be point-symmetrical with the guide slit 71 and the capture claw 72, with the axial and radial centers of the base portion 61 as symmetrical points (see FIG. 8).

The preliminary guide slit 81 has approximately the same shape as the guide slit 71. The preliminary guide slit 81 has a preliminary guide surface 83 having approximately the same shape as the guide surface 73, and a preliminary opposing surface 84 having approximately 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 inside the inclined surface 67a (see FIG. 10(b)). In other words, the preliminary guide surface 83 is also disposed radially inside 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 inside the inclined surface 68a (see FIG. 10(a)). In the axial direction, between the preliminary guide surface 83 and the preliminary opposing surface 84, a bottom surface 85 (see FIG. 8) is formed that connects the radial inner end of the preliminary guide surface 83 and the radial 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.

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, at a position at which it at least partially overlaps with the stopper portion 67 in the axial direction. The preliminary capturing claw 82 is disposed, for example, at the end position on the other side of the preliminary guide 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 the other side in the circumferential direction. The preliminary protruding portion 87 is, for example, a protrusion that protrudes toward the other side in the circumferential direction from the preliminary receiving surface 86. The preliminary protruding portion 87 is disposed on the other side of the preliminary receiving surface 86 in the axial direction.

As shown in Fig. 10(a) and (b), an outer peripheral surface 91 arranged radially outward from the bottom surface 75 is connected to an end on one side of the circumference of the bottom surface 75. An outer peripheral surface 92 arranged radially outward from the bottom surface 75 is connected to an end on the other side of the circumference of the bottom surface 75. The outer peripheral surfaces 91 and 92 are substantially arc-shaped when viewed from the axial direction. The outer peripheral surface 91 is connected to an end on the other side of the circumference of the bottom surface 85. The outer peripheral surface 92 is connected to an end on one side of the circumference of the bottom surface 85. The bottom surfaces 75 and 85 and the outer peripheral surfaces 91 and 92 are formed in the substantially central portion of the base portion 61 in the axial direction. An inclined surface 67a is connected to an end on one side of the axial direction of the outer peripheral surfaces 91 and 92 (see Fig. 9(a) and (b) ). An inclined surface 68a is connected to an end on the other side of the axial direction of the outer peripheral surfaces 91 and 92 (see Fig. 9(a) and (b) ).

(Method of threading connecting member)
Next, among the above-mentioned threading methods for threading multiple yarns Y on the winding body 100, 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, a manner in which the yarn Y (yarn Yb) is captured by the connecting member 60 when the yarn Y (yarn Yb) is arranged 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)) will be described. Here, the description will be given assuming that the connecting member 60 is arranged in the correct orientation.

When threading is performed, when viewed from a direction perpendicular to the axial direction (see Figs. 3(b), 7 and 8), the thread Yb is positioned near the surface of the base portion 61 of the connecting member 60 at a slight angle (left-right direction on the page) with respect to the direction in which the base portion 61 extends (up-down direction on the page). As described above, the thread Yb runs toward the suction mouth 52 (i.e., toward the bottom of the page, 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)).

When the running yarn Yb is arranged 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 along the inclined surfaces 67a and 68a of the base portion 61 of the connecting member 60 (see FIG. 11(a)). When the winding body 100 further rotates, the yarn Yb guided radially inward by the inclined surfaces 67a and 68a is further guided radially inward along the guide surface 73 (see FIG. 11(b)). When the winding body 100 further rotates, the capture claw 72 hooks onto the yarn Yb, and the yarn Yb is captured by the capture claw 72 (see FIG. 11(c) and FIG. 12(a)). The yarn Yb captured by the capture claw 72 is received by the receiving surface 76 (see FIG. 12(b)). The yarn Yb received by the receiving surface 76 is prevented from falling off the receiving surface 76 by the protrusion 77 (more specifically, the yarn Yb is prevented from falling off to one axial side and to the outside in the radial direction). In this way, the yarn Yb is captured and held by the capturing claw 72. Note that the yarn Yb immediately after being captured by the capturing claw 72 is simply received by the receiving surface 76 and can slide relative to the receiving surface 76. This prevents the yarn Yb from becoming unstable, such as being taut or slack, due to the capturing claw 72.

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 capture claw 82 rotates in the opposite direction to the direction in which it catches the yarn Yb. Therefore, the preliminary capture claw 82 does not unintentionally capture the yarn Yb.

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 several times, 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 (suction mouth 52 side) is naturally cut by tension. In this way, the yarn Yb can be wound onto the winding bobbin B2b.

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

As described above, the running yarn Yb is brought closer to the rotating winding body 100, and then hooked onto the capturing claw 72 of the connecting member 60, so that the yarn Yb can be wound into the capturing claw 72 and captured reliably. Furthermore, the guide surface 73 can smoothly guide the yarn Yb radially inward. This makes it possible to allow the yarn Yb to reach the capturing claw 72 while preventing unintentional application of resistance to the yarn Yb. Therefore, the yarn Yb can be captured reliably without slackening.

In addition, when the winding body 100 rotates to one side in the circumferential direction, the receiving surface 76 receives the yarn Yb, thereby capturing the yarn Yb. 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 can slide relative to the receiving surface 76. This makes it possible to prevent the yarn Yb from falling into an unstable state in which it is taut or loosened due to the capturing claw 72. Furthermore, the protrusion 77 can prevent the yarn Yb received by the receiving surface 76 from moving radially outward and falling off the base portion 61. Therefore, the traveling yarn Yb can be stably captured and held.

In addition, the guide slit 71 allows the yarn Yb to be guided radially inward in a reliable and stable manner.

Furthermore, when the connecting member 60 is rotated 180 degrees in a plane parallel to the axial direction, the preliminary guide surface 83 can function in place of the guide surface 73, and the preliminary capturing claw 82 can function in place of the capturing claw 72. This allows the yarn Yb to be captured normally even if the winding body 100 is attached to the winding device 21 in a direction opposite to the normal direction. 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 eliminates the hassle that would arise if the orientation of the connecting member 60 had to be considered.

In addition, the preliminary capture claw 82 is arranged at a different position in the circumferential direction from the capture claw 72. This allows the capture claw 72 and the preliminary capture claw 82 to be formed larger while preventing the base portion 61 from becoming larger in the axial direction, compared to when the capture claw 72 and the preliminary capture claw 82 are arranged at a position where they all or partly overlap in the circumferential direction. Therefore, it is possible to both prevent the connecting member 60 from becoming larger and prevent failure to capture and/or hold the yarn Yb.

In addition, the guide surface 73 and the capture claw 72 are disposed radially inward from the radial outer ends of the pair of stopper portions 66. Therefore, by mounting two winding bobbins B2 having an outer diameter equal to or greater 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 operating mode of the winding device 21 is in multiple mode and single mode. This eliminates the need to replace the contact roller 46 when switching operating modes.

Furthermore, the traveling yarn Yb can be smoothly guided to the guide surface 73 by the inclined surface 68a.

Furthermore, in the threading method of the present embodiment, the thread Yb can be reliably captured and held without slack by capturing the thread Yb with the capturing claws 72. This improves the success rate of threading.

Next, we will explain modified versions of the above embodiment. However, parts that have the same configuration as the above embodiment will be given the same reference numerals and their explanations will be omitted as appropriate.

(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 such a case, the contact roller 46 can be used in both the multiple mode and the single mode.

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 capture claw 72 may protrude radially outward beyond the stopper portions 67, 68. However, in this case, in order to normally apply contact pressure to the winding package P2 in the multiple mode, it is necessary to use a contact roller (not shown) whose central portion in the axial direction is recessed.

(2) In the above embodiment, the preliminary guide surface 83 and the preliminary capture claw 82 are provided at positions different from the guide surface 73 and the capture 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 capture claw 82 may be provided at a position overlapping with the guide surface 73 and the capture claw 72 in the circumferential direction.

(3) In the above embodiment, one each of the capture claws 72 and the spare capture claws 82 is provided on the connecting member 60. However, this is not limited to this. For example, at least one of the capture claws 72 and the spare capture claws 82 may be provided in multiple numbers. As a specific example, two capture claws 72 may be arranged side by side in the circumferential direction. Alternatively, the second capture claw 72 may be provided at a position where, for example, the spare opposing surface 84 is formed. Furthermore, the number of capture claws 72 and the number of spare capture claws 82 provided on the connecting member 60 may be the same or different from each other.

(4) In the above embodiment, the connecting member 60 is provided with the backup guide surface 83 and the backup capture claw 82. However, this is not limited to the above. The connecting member 60 does not have to have the backup guide surface 83 and the backup capture claw 82. In this case, however, attention must be paid to the orientation of the winding body 100 when mounting the winding body 100 on the cradle 43.

(5) In the above embodiment, 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.

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

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

(8) In the above embodiment, the receiving surface 76 and the protruding portion 77 are formed separately, but this is not limited to the above. 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.

(9) The structure of the capture claw 72 is not limited to that described above. The capture claw 72 may be configured to capture the yarn Yb guided radially inward by the guide surface 73 using a means other than the means for clamping the yarn Yb in the gap between the winding bobbin B2 and the base portion 61.

(10) In the above embodiment, the bottom surfaces 75, 85 and the outer peripheral surfaces 91, 92 are formed in the center of the base portion 61 in the axial direction. 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 in the center of the base portion 61 in the axial direction. For example, the bottom surface may be formed radially inward from the above-mentioned bottom surfaces 75, 85.

(11) The winding device 21 may be configured to be capable of executing only multiple modes as an operating mode for winding the yarn Y.

(12) The winding device 21 may be configured to be capable of winding 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).

(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).

REFERENCE SIGNS LIST 1 false twist texturing machine 21 winding device 60 connecting member 61 base portion 62 mounting portion 66 stopper portion 68a inclined surface 71 guide slit 72 catching claw 73 guide surface 74 opposing surface 76 receiving surface 77 protrusion 82 spare catching claw 83 spare guide surface 100 winding body B1 winding bobbin B2 winding bobbin P1 winding package P2 winding package Y yarn Ya yarn Yb yarn

Claims (8)

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 . 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 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. 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 capturing 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. 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. The base portion is
The connecting member according to any one of claims 1 to 4, further comprising a guide slit formed by the guide surface and an opposing surface disposed so as to face the guide surface in the axial direction. A connecting member according to any one of claims 1 to 5, characterized in that the guide surface and the capture claw are disposed radially inward from the radially outermost ends of the pair of stopper portions. 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. 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 as to be captured by the capturing claw.

Images