Spun yarn take-up machine and package manufacturing method

Abstract

To suppress the entanglement of a plurality of monofilament yarns during the production of a mother yarn.SOLUTION: The spun yarn take-up system 1 includes a traverse guide 22, a fulcrum guide 21, a yarn guide 16, and a bending guide 26. The fulcrum guide 21 is arranged on the upper side of the traverse guide 22 and on the upstream side in the traveling direction of the mother yarn MY, and extends in the left-right direction (first axis direction). The yarn guide 16 is arranged upstream of the fulcrum guide 21 in the travelling direction. The bending guide 26 is arranged between the yarn guide 16 and the fulcrum guide 21 in the travelling direction. When viewed from the first axial direction, the bending contact surface 26a of the bending guide 26 is disposed on the same side as the fulcrum guide 21 in the fulcrum normal direction with respect to the fulcrum imaginary tangent line VLP and faces the side opposite to the fulcrum imaginary tangent line VLP.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a yarn take-up machine and a package manufacturing method. [Background technology]

[0002] Synthetic fiber yarns have been known for some time. The yarn is spun from a spinning machine nozzle and taken up by a yarn take-off machine (see, for example, Patent Document 1). The yarn travels through the yarn take-off machine while being guided by a plurality of yarn guides, and is wound onto a bobbin. A package is formed by winding the yarn onto the bobbin. The package manufactured through these processes is used in a subsequent process (such as a weaving process). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-165060 Summary of the Invention [Problem to be solved by the invention]

[0004] Known types of yarn include monofilament yarns consisting of a single filament and multifilament yarns consisting of multiple filaments. Although not disclosed in Patent Document 1, multiple monofilament yarns are sometimes treated as a single multifilament yarn for the purpose of improving yarn production efficiency. That is, multiple filaments (monofilament yarns) spun from the spinning machine's nozzle may pass through substantially the same yarn path and be wound onto a single bobbin. Hereinafter, for convenience of explanation, the bundle of yarn wound onto the bobbin in this manner will be referred to as the mother yarn. While the mother yarn is treated as a single yarn in the spinning take-up machine, it is separated into the original multiple monofilaments in a later process. Hereinafter, for convenience of explanation, the act of unwinding the mother yarn from the package and separating it into multiple monofilaments will be referred to as splitting. The separated multiple monofilament yarns are treated as separate yarns.

[0005] In order to smoothly unwind and separate the mother yarn from the package in the subsequent process, it is necessary to run the multiple monofilament yarns in the spinning yarn take-off machine without entangling them with each other. However, in conventional spinning yarn take-off machines, the multiple monofilament yarns guided by the conventional yarn guides have a problem of entangling with each other.

[0006] An object of the present invention is to prevent a plurality of monofilament yarns from becoming entangled when the mother yarn is wound to produce a package. [Means for solving the problem]

[0007] A spinning take-off machine of a first invention is a spinning take-off machine configured to take up a mother yarn having a plurality of monofilament yarns spun from a spinning device and wind the mother yarn onto a bobbin to form a package, the spinning take-off machine comprising: a traverse guide arranged upstream of the bobbin in the running direction of the mother yarn for traversing the mother yarn in a predetermined traverse direction; a fulcrum guide arranged upstream of the traverse guide in the running direction, extending in a first axial direction perpendicular to the traverse direction and parallel to the horizontal direction, and serving as a fulcrum when the mother yarn is traversed; and an upstream fulcrum guide arranged upstream of the fulcrum guide in the running direction. The present invention is characterized in that the fulcrum guide comprises a guide, and a bending guide arranged between the upstream guide and the fulcrum guide in the running direction, wherein the fulcrum contact surface of the fulcrum guide that comes into contact with the mother yarn forms a curved fulcrum contact line when viewed from the first axial direction, and the bending contact surface of the bending guide that comes into contact with the mother yarn, when viewed from the first axial direction, is arranged on the same side as the fulcrum guide in a fulcrum normal direction that is perpendicular to the direction in which the fulcrum imaginary tangent extends, and faces the opposite side to the fulcrum imaginary tangent, based on a fulcrum imaginary tangent drawn on the fulcrum contact line from the upstream separation point where the mother yarn leaves the upstream guide.

[0008] By winding a mother yarn having multiple monofilament yarns onto a bobbin without entangling the mother yarn, a package is formed that allows the mother yarn to be separated in a subsequent process. Generally, the size of a yarn guide that guides a yarn is sufficiently small compared to the length of the yarn path. Therefore, when considering the placement of the yarn guide in relation to the yarn path, the yarn guide can be considered to be substantially point-like. Therefore, the directions of the fulcrum virtual tangent and fulcrum normal are substantially independent of how the upstream separation point is determined.

[0009] In order to facilitate the unwinding and separation of the mother yarn in subsequent processes, the multiple monofilament yarns must run without entangling with each other. The multiple monofilament yarns are prone to entanglement if they float up from the guide and become unruly. In this regard, the present invention uses the arrangement of the bending guide to impart tension to the mother yarn, allowing the mother yarn to run while being pressed against the fulcrum guide (details will be described in the embodiments).

[0010] This can prevent the plurality of monofilament yarns from unintentionally floating up from the fulcrum guide, and therefore can prevent the plurality of monofilament yarns from becoming entangled when the mother yarn is wound to produce a package.

[0011] Furthermore, since the fulcrum guide is close to the traverse guide and the bobbin in the running direction, the mother yarn can be wound onto the bobbin while maintaining a state in which the entanglement of multiple monofilament yarns is suppressed.

[0012] The spinning take-up machine of the second invention is characterized in that, in the first invention, in any cross section of the fulcrum guide that is parallel to the first axial direction and intersects with the fulcrum contact surface, the fulcrum contact surface forms a line segment extending along the first axial direction, or forms a curved line that is convex toward the yarn path side of the mother yarn.

[0013] In the present invention, due to the shape of the fulcrum contact surface, the multiple monofilament yarns included in the mother yarn can be made to run adjacent to each other in the first axial direction or slightly spaced apart from each other in the first axial direction (details will be described in the embodiment). In other words, the multiple monofilament yarns can be prevented from overlapping with each other in the first axial direction on the fulcrum contact surface. Therefore, the multiple monofilament yarns can be further prevented from entangling with each other during the production of the mother yarn.

[0014] The spinning take-up machine of the third invention is characterized in that the curved guide extends in a second axial direction along the horizontal direction, and in any cross section of the curved guide that is parallel to the second axial direction and intersects with the curved contact surface, the curved contact surface forms a line segment extending along the second axial direction or forms a curved line that is convex toward the yarn path side of the mother yarn.

[0015] In the present invention, due to the shape of the bending contact surface, multiple monofilament yarns can be run adjacent to each other in the second axial direction or run slightly apart from each other in the second axial direction. In other words, it is possible to prevent multiple filament yarns from overlapping each other in the second axial direction on the bending contact surface. Therefore, it is possible to further prevent multiple monofilament yarns from entangling during the production of mother yarns.

[0016] The spinning yarn take-up machine of the fourth invention is characterized in that, in any one of the first to third inventions, the fulcrum guide is configured to be non-rotatable while the mother yarn is running.

[0017] In the present invention, the fulcrum guide squeezes the running mother yarn, thereby widening the gap between adjacent monofilament yarns (i.e., spreading them apart), thereby further preventing the monofilament yarns from becoming entangled during the production of the mother yarn.

[0018] The package manufacturing method of the fifth invention is a package manufacturing method for manufacturing the package using the spinning take-up machine of any of the first to fourth inventions, characterized in that the mother yarn is wound around the bobbin to form the package without entangling the mother yarn.

[0019] In the present invention, entanglement of a plurality of monofilament yarns can be effectively prevented, and therefore, the mother yarn unwound from the package can be easily separated. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a front view of a spinning take-up machine according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. 2 is a side view of the spinning take-up machine. [Figure 4] FIG. 10 is a diagram showing a first definition of the positional relationship between a thread guide, a fulcrum guide, and a bending guide. [Figure 5] FIG. 10 is a diagram showing a second definition of the positional relationship between the thread guide, the fulcrum guide, and the bending guide. [Figure 6] 1A is a longitudinal cross-sectional view of a fulcrum guide, and FIG. 1B is a longitudinal cross-sectional view of a bending guide. [Figure 7] 10A is a vertical cross-sectional view of a fulcrum guide according to a modified example, and FIG. 10B is a vertical cross-sectional view of a bending guide according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0021] Next, an embodiment of the present invention will be described. For convenience of explanation, the directions shown in Fig. 1 are defined as front-rear, left-right, top-bottom directions. The top-bottom direction (a direction parallel to the top-bottom direction on the paper surface of Fig. 1) is the vertical direction in which gravity acts. The left-right direction (a direction parallel to the left-right direction on the paper surface of Fig. 1) is a predetermined direction perpendicular to the top-bottom direction. The front-rear direction (a direction parallel to the direction perpendicular to the paper surface of Fig. 1) is a direction perpendicular to both the top-bottom direction and the left-right direction. The left-right direction and front-rear direction are directions parallel to the horizontal direction. The direction in which the mother yarn MY, which will be described later, runs is defined as the running direction.

[0022] (Configuration of spinning take-up machine) FIG. 1 is a front view of a yarn take-off machine 1 according to this embodiment. The yarn take-off machine 1 is configured to take up multiple mother yarns MY spun from a spinning device 2 and wind them onto multiple bobbins B, respectively, to form multiple packages P. The yarn take-off machine 1 winds each mother yarn MY onto a bobbin B without entangling the mother yarns MY. In other words, the yarn take-off machine 1 is not provided with a known intertwining device that intertwines a general multifilament yarn (not shown). Note that multiple yarn take-off machines 1 (and multiple spinning devices 2) may be arranged side by side in the left-right direction.

[0023] Before specifically describing the configuration of the spinning take-off machine 1, the spinning device 2 and mother yarn MY will be briefly described with reference to FIG. 2. FIG. 2 is a front view of the spinning device 2. The spinning device 2 is, for example, a known melt spinning device. The spinning device 2 is configured to be able to spin multiple filaments fm (monofilament yarns) made of a synthetic fiber yarn material (e.g., polyester, nylon, etc.). The spinning device 2 has a spinning beam 2a and multiple spinnerets 2b. The spinning beam 2a extends, for example, in the left-right direction. The multiple spinnerets 2b are fixed to the spinning beam 2a and arranged side by side in the left-right direction. A molten yarn material (not shown) is sent to the spinning beam 2a and is discharged (spun out) from each of the multiple spinnerets 2b. The discharged yarn material is cooled and solidified by a cooling device (not shown) to become a filament fm. Multiple filaments fm are produced corresponding to each of the multiple spinnerets 2b.

[0024] The multiple filaments fm corresponding to each spinneret 2b are treated as a single mother yarn MY by being oiled, for example, by an oil application guide 3 (see FIG. 2), and being brought into close proximity to each other. In other words, the mother yarn MY has multiple filaments fm (monofilament yarn). The number of the multiple mother yarns MY is equal to the number of the multiple spinnerets 2b. The mother yarn MY is treated as a single yarn in the spinning take-off machine 1, but needs to be separated again into multiple filaments fm (i.e., split) in a later process. For this reason, unlike general multifilament yarns that are entangled to prevent unraveling, the mother yarn MY is not entangled. The mother yarn MY is wound onto a bobbin B without being entangled in the spinning take-off machine 1. In this respect, the mother yarn MY differs from general multifilament yarns.

[0025] Next, the specific configuration of the yarn take-off machine 1 will be described with reference to Figures 1 and 3. The yarn take-off machine 1 has, in order from the upstream side in the running direction, for example, a direction changing guide 11, a pair of rollers 12, a pair of rollers 13, a godet roller 14, a regulating guide 15, a plurality of yarn guides 16 (upstream guides of the present invention), and a winding device 17 (see Figure 1). The yarn take-off machine 1 of this embodiment is used to wind, for example, a mother yarn MY made of nylon.

[0026] The direction-changing guide 11 (see FIG. 1) is a guide for changing the direction in which the multiple mother yarns MY are arranged. The direction-changing guide 11 is arranged downstream in the running direction of the multiple oil agent application guides 3 (see FIG. 2). The direction-changing guide 11 is inclined, for example, at approximately 45 degrees with respect to the left-right direction. This allows the multiple mother yarns MY, which run side by side in the left-right direction on the upstream side of the direction-changing guide 11 in the running direction, to run side by side in the front-rear direction on the downstream side of the direction-changing guide in the running direction.

[0027] The pair of rollers 12 (see FIG. 1) is for drawing the mother yarn MY between the pair of rollers 13 (see FIG. 1). The pair of rollers 12 is, for example, arranged downstream of the direction change guide 11 and upstream of the pair of rollers 13 in the running direction. The pair of rollers 12 is, for example, a known Nelson roller. More specifically, the pair of rollers 12 includes, for example, roller 12a and roller 12b. The axial direction of roller 12a and the axial direction of roller 12b are, for example, inclined relative to each other. The axial direction of roller 12a or the axial direction of roller 12b may be approximately parallel to the front-to-rear direction. Multiple mother yarns MY are wound around the outer peripheral surface of each roller 12 multiple times. The mother yarn MY is wound around each roller 12 while the winding positions on the outer peripheral surfaces of the rollers 12 are gradually shifted in the axial direction. This prevents the mother yarns MY from interfering with each other on the rollers 12. Each of the pair of rollers 12 is rotated by a motor (not shown). The pair of rollers 12 rotate at approximately the same peripheral speed. Each of the pair of rollers 12 may be a heating roller that heats the mother yarn MY by being heated by a heater (not shown) depending on the material of the mother yarn MY. In this case, the pair of rollers 12 may be housed in an insulating box (not shown) to prevent them from being cooled by outside air. Alternatively, each of the pair of rollers 12 may be a non-heating roller that does not heat the mother yarn MY.

[0028] The pair of rollers 13 (see FIG. 1) is for drawing the mother yarn MY between the pair of rollers 12 (see FIG. 1). The pair of rollers 13 is, for example, arranged downstream of the pair of rollers 12 and upstream of the godet roller 14 in the running direction. The pair of rollers 13 is, for example, a known Nelson roller, and has basically the same configuration as the pair of rollers 12. The pair of rollers 13 includes, for example, a roller 13a and a roller 13b. The mother yarns MY are wound around the outer circumferential surface of each roller 13 multiple times in the same manner as they are wound around the pair of rollers 12. Each of the pair of rollers 13 is driven to rotate by a motor (not shown). The peripheral speeds of the pair of rollers 13 are approximately equal to each other. The peripheral speed of the pair of rollers 13 is higher than the peripheral speed of the pair of rollers 12. The mother yarn MY is drawn due to the difference between the peripheral speeds of the pair of rollers 13 and the pair of rollers 12. Each of the pair of rollers 13 is a heating roller that is heated by a heater (not shown) to heat the mother yarn MY. The mother yarn MY is thermally fixed by the pair of rollers 13. The pair of rollers 13 is housed in a heat-insulating box 18 that houses an internal space. The heat-insulating box 18 is a box that prevents outside air from entering the internal space, thereby preventing the pair of rollers 13 from being cooled.

[0029] The godet roller 14 is a roller for feeding the mother yarn MY toward the winding device 17. The godet roller 14 is disposed downstream of the pair of rollers 13 and upstream of the regulating guide 15 in the running direction. The axial direction of the godet roller 14 is, for example, substantially parallel to the front-to-rear direction. The mother yarn MY is wound around the outer peripheral surface of the godet roller 14 at a winding angle of less than 360° while being aligned in the axial direction. The godet roller 14 is rotationally driven by a motor (not shown).

[0030] The regulating guide 15 is a guide that prevents the axial spacing of the multiple mother yarns MY from unintentionally widening on the outer peripheral surface of the godet roller 14. The regulating guide 15 is configured, for example, in a comb-like shape. The regulating guide 15 is disposed downstream of the godet roller 14 and upstream of the multiple yarn guides 16 in the running direction.

[0031] Here, the yarn take-up machine 1 is equipped with the godet roller 14, but is not limited to this. For example, a yarn take-up machine (not shown) that winds a mother yarn (not shown) made of polyester such as PET may not be provided with the godet roller 14. In other words, the mother yarn may be sent directly from the pair of rollers 13 to the regulating guide 15 in the running direction, for example.

[0032] The multiple yarn guides 16 are members that respectively guide the multiple mother yarns MY downstream in the running direction. Each of the multiple yarn guides 16 is a known guide such as a snail guide or a dog tail guide. The multiple yarn guides 16 are arranged, for example, in the front-to-rear direction. The multiple yarn guides 16 are arranged downstream of the regulating guide 15 and upstream of the winding device 17 in the running direction. The multiple yarn guides 16 are provided corresponding to the multiple mother yarns MY, respectively. Each mother yarn MY is hooked onto the corresponding yarn guide 16. This defines the path (yarn path) of each mother yarn MY.

[0033] The winding device 17 is configured to wind a plurality of mother yarns MY onto a plurality of bobbins B, respectively, to form a plurality of packages P. The winding device 17 is disposed downstream of the plurality of yarn guides 16 in the running direction. As shown in FIG. 3 , the winding device 17 includes a frame 20, a plurality of fulcrum guides 21, a plurality of traverse guides 22, a turret 23, two bobbin holders 24, and a contact roller 25.

[0034] The frame 20 is a member installed on, for example, the floor of a factory, to which each component of the winding device 17 is attached or housed. The multiple fulcrum guides 21 are guides that serve as fulcrums when the mother yarn MY is traversed by each traverse guide 22. Each fulcrum guide 21 is attached, for example, to a support 27 (see FIG. 1) fixed to the frame 20. The support 27 is arranged, for example, so as to protrude upward from the upper end of the frame 20. The support 27 also extends in the front-rear direction (not shown) and is configured to be able to support the multiple fulcrum guides 21. Each fulcrum guide 21 guides the mother yarn MY downstream in the running direction. As shown in FIG. 3, the multiple fulcrum guides 21 are provided individually for the multiple mother yarns MY. The multiple fulcrum guides 21 are arranged in the front-rear direction.

[0035] The plurality of traverse guides 22 are provided individually for the plurality of mother yarns MY. The plurality of traverse guides 22 are arranged side by side in the front-rear direction. Each traverse guide 22 is driven by a motor (not shown) and moves back and forth in a traverse direction (see FIG. 4) that is substantially parallel to the front-rear direction. As a result, the mother yarn MY, which is wound around the traverse guide 22, is traversed around the fulcrum guide 21. The turret 23 is a disk-shaped member whose axial direction is substantially parallel to the front-rear direction. The turret 23 is driven to rotate by a motor (not shown). Two bobbin holders 24 are rotatably supported at the upper and lower ends of the turret 23, respectively. The axial direction of each bobbin holder 24 is substantially parallel to the front-rear direction. Each bobbin holder 24 supports a plurality of bobbins B arranged side by side in the front-rear direction. Each of the two bobbin holders 24 is driven to rotate by a separate motor (not shown). The contact roller 25 is a roller arranged near the upper bobbin holder 24. The axial direction of the contact roller 25 is approximately parallel to the front-rear direction. The contact roller 25 comes into contact with the surfaces of the multiple packages P supported by the upper bobbin holder 24, thereby applying contact pressure to the surfaces of the packages P during winding, thereby shaping the packages P.

[0036] In the winding device 17 having the above configuration, when the upper bobbin holder 24 is rotationally driven, the mother yarn MY traversed by the traverse guide 22 is wound onto the bobbin B to form a package P. When the package P is fully wound, the turret 23 is rotated, and the upper and lower positions of the two bobbin holders 24 are swapped. As a result, the bobbin holder 24 located on the lower side moves upward. A plurality of mother yarns MY are wound onto the plurality of bobbins B attached to the upper bobbin holder 24, respectively, to form a plurality of packages P. The bobbin holder 24 with the fully wound packages P attached thereto is moved downward. The fully wound packages P are collected, for example, by a package collection device (not shown).

[0037] Here, in order to smoothly unwind and separate the mother yarn MY from the package P in the subsequent process, it is necessary to run the multiple filaments fm (monofilament yarns) without entangling them with each other in the yarn take-off machine 1. However, in a conventional yarn take-off machine (not shown), a problem occurs in which multiple monofilament yarns guided by a conventional yarn guide (not shown) become entangled. Therefore, in order to prevent multiple monofilament yarns from becoming entangled when producing the mother yarn MY, the yarn take-off machine 1 has the following configuration.

[0038] (Details of the configuration of the spinning take-up machine) The details of the configuration of the yarn take-off machine 1 will be described with reference to Fig. 3 to Fig. 6(b). Fig. 4 is a diagram showing a first definition (described later) of the positional relationship between the yarn guide 16, the fulcrum guide 21, and the bending guide 26 (described later). Fig. 5 is a diagram showing a second definition (described later) of the positional relationship between the yarn guide 16, the fulcrum guide 21, and the bending guide 26. Fig. 6(a) is a vertical cross-sectional view of the fulcrum guide 21. Fig. 6(b) is a vertical cross-sectional view of the bending guide 26.

[0039] As shown in FIG. 3, the yarn take-off machine 1 has a plurality of bending guides 26. The bending guides 26 are provided corresponding to the plurality of mother yarns MY, respectively. As shown in FIG. 4, the bending guide 26 is disposed downstream of the yarn guide 16 and upstream of the fulcrum guide 21 in the running direction. The bending guide 26 is attached to, for example, a support 27. The bending guide 26 and the fulcrum guide 21 are guides for running the mother yarn toward the bobbin B while the monofilament yarns are arranged side by side. Each of the bending guide 26 and the fulcrum guide 21 has, for example, a substantially cylindrical shape. More details will be described later. The bending guide 26 is attached to the support 27 so as not to rotate. That is, when the mother yarn MY is running, the bending guide 26 is provided so as not to rotate. The fulcrum guide 21 is attached to the support 27 so as not to rotate. That is, when the mother yarn MY is running, the fulcrum guide 21 is provided so as not to rotate. The bending guide 26 and the fulcrum guide 21 extend, for example, in the left-right direction. The left-right direction corresponds to the first axis direction (the direction in which the fulcrum guide 21 extends) and the second axis direction (the direction in which the bending guide 26 extends) of the present invention.

[0040] The positional relationship between the yarn guide 16, bending guide 26, and fulcrum guide 21 corresponding to each mother yarn MY will be described. The positional relationship between these members can be defined in two ways (first definition and second definition). The first definition and second definition will be described in more detail below.

[0041] (1st definition) The first definition will be explained with reference to Fig. 4. Fig. 4 schematically shows the yarn guide 16, the bending guide 26, and the fulcrum guide 21. Fig. 4 illustrates the fulcrum guide 21 that is arranged at the forefront of the multiple fulcrum guides 21, as well as the mother yarn MY, the yarn guide 16, and the bending guide 26 corresponding thereto. The bending guide 26 is arranged, for example, above the fulcrum guide 21. However, the bending guide 26 does not necessarily have to be arranged directly above the fulcrum guide 21. Depending on the running path of the mother yarn MY, the position of the bending guide 26 in the front-rear direction may differ from the position of the fulcrum guide 21 in the front-rear direction.

[0042] As shown in Figure 4, the point on the yarn guide 16 where the mother yarn MY leaves is defined as the upstream separation point PLu. The position of the upstream separation point PLu on the yarn guide 16 may change slightly when the mother yarn MY or a part of the multiple filaments fm sways, etc. However, the change in the position of the upstream separation point PLu is negligibly small compared to the length of the yarn path from the yarn guide 16 to the fulcrum guide 21.

[0043] The surface of the bending guide 26 that comes into contact with the mother yarn MY is defined as the bending contact surface 26a. The surface of the fulcrum guide 21 that comes into contact with the mother yarn MY is defined as the fulcrum contact surface 21a. When viewed from the left-right direction (perpendicular to the plane of FIG. 4), the fulcrum contact surface 21a forms a curved fulcrum contact line 21a1. A tangent line drawn from the upstream separation point PLu to the fulcrum contact line 21a1 is defined as a fulcrum virtual tangent line VLP, and the point of contact is defined as a tangent point PT. The direction in which the fulcrum virtual tangent line VLP extends is defined as the fulcrum tangent direction. When viewed from the left-right direction, a direction perpendicular to the fulcrum tangent direction is defined as the fulcrum normal direction. When viewed from the left-right direction, the bending contact surface 26a forms a curved bending contact line 26a1. The bending contact surface 26a is located on the same side as the fulcrum guide 21 in the fulcrum normal direction with respect to the fulcrum virtual tangent line VLP. When viewed from the left and right, the bent contact surface 26a faces the opposite side to the fulcrum virtual tangent line VLP in the fulcrum normal direction. This makes the yarn path bent compared to when the bent guide 26 is not provided (i.e., when the yarn path of the mother yarn MY is substantially linear from the yarn guide 16 to the fulcrum guide 21).

[0044] (Second definition) The second definition will be explained with reference to Fig. 5. Fig. 5 also schematically shows the yarn guide 16, the bending guide 26, and the fulcrum guide 21. Fig. 5 also illustrates the fulcrum guide 21 that is arranged at the frontmost side among the multiple fulcrum guides 21, as well as the mother yarn MY, the yarn guide 16, and the bending guide 26 that correspond to it.

[0045] As in the first definition, the point on the yarn guide 16 where the mother yarn MY leaves is defined as the upstream separation point PLu (see FIG. 5). As shown in FIG. 5, the point on the bending guide 26 where the mother yarn MY first contacts is defined as the bending contact point PTm. As with the upstream separation point PLu, the change in position of the bending contact point PTm is also negligibly small compared to the length of the yarn path from the yarn guide 16 to the fulcrum guide 21. When viewed from the left-right direction, an imaginary line passing through the upstream separation point PLu and the bending contact point PTm is defined as a first imaginary line VL1 (see the two-dot chain line in FIG. 5). The extension direction of the first imaginary line VL1 is defined as the extension direction. The point on the bending guide 26 where the mother yarn MY leaves is defined as the bending separation point PLm. The point on the fulcrum guide 21 where the mother yarn MY first contacts is defined as the fulcrum contact point PTd. The point on the fulcrum guide 21 where the mother yarn MY leaves is defined as the fulcrum separation point PLd. An imaginary line passing through the bend separation point PLm and the fulcrum contact point PTd is defined as a second imaginary line VL2. The second imaginary line VL2 is a tangent to the bend guide 26 with the bend separation point PLm as its contact point, and is also a tangent to the fulcrum guide 21 with the fulcrum contact point PTd as its contact point. The direction in which the second imaginary line VL2 extends is defined as the tangential direction. The direction perpendicular to the tangential direction when viewed from the left and right is defined as the normal direction.

[0046] When viewed from the left-right direction, the bending contact point PTm of the bending guide 26 is located on the opposite side of the second virtual straight line VL2 from the fulcrum separation point PLd of the fulcrum guide 21 (see FIG. 5). This makes the yarn path curved compared to when the bending guide 26 is not provided (i.e., when the yarn path of the mother yarn MY is substantially linear from the yarn guide 16 to the fulcrum guide 21).

[0047] In both the first and second definitions, when viewed from the left-right direction, the contact length of the mother yarn MY with the fulcrum guide 21 (i.e., the length of the fulcrum contact line 21a1) is longer than when the bending guide 26 is not provided. This ensures that the mother yarn MY is in firm contact with the fulcrum guide 21, thereby suppressing the mother yarn MY from floating up from the fulcrum guide 21.

[0048] Next, the shape of the fulcrum guide 21 will be described. In any cross section of the fulcrum guide 21 that is parallel to the left-right direction and intersects with the fulcrum contact surface 21a, the fulcrum contact surface 21a forms a line segment extending along the left-right direction. As a specific example, consider a cross section (see FIG. 6(a)) of the fulcrum guide 21 that is perpendicular to the tangential direction and includes the fulcrum contact point PTd (see FIG. 5). In this cross section, the fulcrum contact surface 21a forms a substantially linear fulcrum edge 21a2 (line segment LS1).

[0049] Next, the shape of the bending guide 26 will be described. In any cross section of the bending guide 26 that is parallel to the left-right direction and intersects with the bending contact surface 26a, the bending contact surface 26a forms a line segment extending along the left-right direction. As a specific example, consider a cross section (see FIG. 6(b)) of the bending guide 26 that is perpendicular to the tangential direction and includes the bending contact point PTm (see FIG. 5). In this cross section, the bending contact surface 26a forms a substantially linear bending edge 26a2 (line segment LS2).

[0050] The mother yarn MY is guided downstream in the running direction by the yarn guide 16, bending guide 26, and fulcrum guide 21 configured as described above. First, the mother yarn MY is bent by the bending guide 26. As a result, a certain amount of tension is applied to the mother yarn MY on the yarn path from the yarn guide 16 to the fulcrum guide 21. Furthermore, the bending contact surface 26a of the bending guide 26 extends along the left-right direction (second axial direction). Therefore, the mother yarn MY to which tension is applied runs in contact with the bending contact surface 26a, and thus the multiple filaments fm contained in the mother yarn MY are aligned along the left-right direction (see FIG. 6(b)). Furthermore, the fulcrum contact surface 21a of the fulcrum guide 21 extends along the left-right direction (first axial direction). Therefore, the mother yarn MY to which tension is applied is pressed against the fulcrum guide 21. The mother yarn MY runs in contact with the fulcrum contact surface 21a, and thus the multiple filaments fm are aligned along the left-right direction (see FIG. 6(a)). The mother yarn MY is traversed by the traverse guide 22 while maintaining this aligned state, and is wound onto the bobbin B. In this manner, the mother yarn MY is wound onto the bobbin without being entangled, and a package P is produced.

[0051] As described above, due to the arrangement of the bending guide 26, tension is applied to the mother yarn MY, and the mother yarn MY can be made to run while being pressed against the fulcrum guide 21. This makes it possible to prevent the plurality of filaments fm from unintentionally floating up from the fulcrum guide 21. Therefore, when the mother yarn MY is wound to produce a package P, it is possible to prevent the plurality of filaments fm from becoming entangled.

[0052] Furthermore, the mother yarn MY traversed by the traverse guide 22 is wound onto a bobbin arranged immediately downstream in the running direction of the traverse guide 22. In this embodiment, since the fulcrum guide 21 is close to the bobbin B in the running direction, the mother yarn MY can be wound onto the bobbin B while maintaining a state in which the entanglement of the multiple filaments fm is suppressed.

[0053] Furthermore, due to the shape of the fulcrum contact surface 21a, the multiple filaments fm included in the mother yarn MY can be made to run adjacent to each other in the first axial direction. In other words, the multiple filaments fm can be prevented from overlapping with each other in the first axial direction on the fulcrum contact surface 21a. Therefore, entanglement of the multiple filaments fm during production of the mother yarn MY can be further prevented.

[0054] Furthermore, due to the shape of the bent contact surface 26a, the multiple filaments fm can be run adjacent to each other in the second axial direction. In other words, the multiple filaments fm can be prevented from overlapping with each other in the second axial direction on the bent contact surface 26a. Therefore, the multiple filaments fm can be further prevented from entangling with each other during production of the mother yarn MY.

[0055] Furthermore, the fulcrum guide 21 is provided so as not to rotate. Therefore, the fulcrum guide 21 squeezes the running mother yarn MY, thereby widening the gaps between adjacent filaments fm (i.e., spreading them apart). Therefore, entanglement of the filaments fm during production of the mother yarn MY can be further suppressed.

[0056] Furthermore, the method for manufacturing the package P (package manufacturing method) of this embodiment can effectively prevent the plurality of filaments fm from becoming entangled, and therefore the mother yarn MY unwound from the package P can be easily separated.

[0057] Next, a modified example of the embodiment will be described, in which the same reference numerals will be used to designate components having the same configuration as the embodiment, and the description thereof will be omitted as appropriate.

[0058] (1) In the above embodiment, the positional relationship between the yarn guide 16, the bending guide 26, and the fulcrum guide 21 can be defined based on the first and second definitions. However, this is not limited to this. The above-described positional relationship and shape may be defined by only one of the first and second definitions. In other words, the above-described positional relationship and shape may satisfy only one of the first and second definitions. Even with this configuration, entanglement of multiple filaments fm can be suppressed.

[0059] (2) In the above-described embodiments, the fulcrum guide 21 has a substantially cylindrical shape. However, this is not limited to this. A specific description will be given with reference to FIG. 7(a). A fulcrum guide 31 may be provided instead of the fulcrum guide 21. The direction shown in FIG. 7(a) is the same as the direction shown in FIG. 6(a). The fulcrum contact surface 31a of the fulcrum guide 31, with which the mother yarn MY comes into contact, may be convex outward. The term "convex outward" will be described in more detail below. In any cross section of the fulcrum guide 31 that is parallel to the left-right direction and intersects with the fulcrum contact surface 31a, the fulcrum contact surface 31a forms a curved line that is convex toward the yarn path of the mother yarn MY. As a specific example, the fulcrum edge 31a2 (see FIG. 7(a)) corresponding to the above-described fulcrum edge 21a2 is curved so as to be convex toward the yarn path of the mother yarn MY in the left-right direction. More specifically, the center of curvature of the fulcrum edge 31a2 is located on the opposite side of the fulcrum edge 31a2 from the yarn path of the mother yarn MY in the normal direction. Although not shown, the center of curvature is located, for example, further to the right of the fulcrum guide 31 in the left-right direction of the paper surface of FIG. 7(a). This allows the multiple filaments fm contained in the mother yarn MY to run while being slightly spaced apart from each other in the left-right direction (see FIG. 7(a)). As long as the fulcrum contact surface 31a is convex outward in this way, the shape of the fulcrum guide 31 is not limited to that shown in FIG. 7(a).

[0060] Alternatively, a fulcrum guide (not shown) having a slightly convex fulcrum contact surface (not shown) on the inside may be provided instead of the fulcrum guides 21 and 31. Even in such a fulcrum guide, the mother yarn MY can be prevented from floating up from the fulcrum guide due to the positional relationship with the bending guide 26 (or the bending guide 32 described below).

[0061] (3) In the above-described embodiments, the bent guide 26 has a substantially cylindrical shape. However, this is not limited to this. A specific description will be given with reference to FIG. 7(b). A bent guide 32 may be provided instead of the bent guide 26. The direction shown in FIG. 7(b) is the same as the direction shown in FIG. 6(b). The bent contact surface 32a of the bent guide 32 with which the mother yarn MY comes into contact may be convex outward. That is, in any cross section of the bent guide 32 that is parallel to the left-right direction and intersects with the bent contact surface 32a, the bent contact surface 32a forms a curved line that is convex toward the yarn path of the mother yarn MY. As a specific example, the bent edge 32a2 (see FIG. 7(b)) corresponding to the above-described bent edge 26a2 is curved in the left-right direction. More specifically, the center of curvature of the bent edge 32a2 is located on the opposite side of the bent edge 32a2 from the yarn path of the mother yarn MY in the normal direction. Although not shown, the center of curvature is, for example, located further left than the bending guide 32 in the left-right direction of the paper surface of Fig. 7(b). This allows the multiple filaments fm contained in the mother yarn MY to run while being slightly spaced apart from each other in the left-right direction (see Fig. 7(b)). As long as the bending contact surface 32a is convex outward in this way, the shape of the bending guide 32 is not limited to that shown in Fig. 7(b).

[0062] Alternatively, instead of the bending guide 26 and the bending guide 32, a bending guide (not shown) having a slightly convex bending contact surface (not shown) on the inside may be provided.

[0063] (4) In the above-described embodiments, the fulcrum guide 21 (or the fulcrum guide 31) is provided so as to be non-rotatable. However, this is not limited to this. The fulcrum guide 21 (or the fulcrum guide 31) may be, for example, a roller configured to be rotatable with the left-right direction as the rotation axis direction. Furthermore, in the above-described embodiments, the bending guide 26 (or the bending guide 32) is provided so as to be non-rotatable. However, this is not limited to this. The bending guide 26 (or the bending guide 32) may be, for example, a roller configured to be rotatable with the left-right direction as the rotation axis direction.

[0064] (5) In the above-described embodiments, the direction in which the mother yarn MY is arranged on the bending guide 26 and the direction in which the mother yarn MY is arranged on the fulcrum guide 21 are substantially the same (i.e., substantially parallel to the left-right direction). However, this is not limited to this. The direction in which the mother yarn MY is arranged on the bending guide 26 (second axial direction) and the direction in which the mother yarn MY is arranged on the fulcrum guide 21 (first axial direction) may be inclined relative to each other.

[0065] (6) The number of mother yarns MY taken up by the yarn take-off machine 1 is not limited to the above. The yarn take-off machine 1 may be configured to take up only one mother yarn MY, for example. [Explanation of symbols]

[0066] 1. Spinning take-up machine 2. Spinning equipment B Bobbin 16 Yarn guide (upstream guide) 21 Fulcrum Guide 21a Fulcrum contact surface 21a1 Fulcrum contact line 21a2 Fulcrum edge 22 Traverse Guide 26 Bending guide 26a Bent contact surface 26a2 Bent edge 31 Fulcrum Guide 31a Fulcrum contact surface 31a2 Fulcrum edge 32 Bending guide 32a Bent contact surface 32a2 Bent edge fm filament (monofilament thread) MY mother thread P Package PLu upstream isolation point VLP Virtual tangent to support point

Claims

1. A spinning yarn take-off machine configured to take up a mother yarn having a plurality of monofilament yarns spun from a spinning device and wind the mother yarn around a bobbin to form a package, a traverse guide disposed upstream of the bobbin in the running direction of the mother yarn, for traversing the mother yarn in a predetermined traverse direction; a fulcrum guide that is disposed upstream of the traverse guide in the running direction, extends in a first axial direction that is perpendicular to the traverse direction and parallel to the horizontal direction, and serves as a fulcrum when the mother yarn is traversed; an upstream guide disposed upstream of the fulcrum guide in the traveling direction; a bending guide disposed between the upstream guide and the fulcrum guide in the traveling direction, a fulcrum contact surface of the fulcrum guide that comes into contact with the mother yarn forms a curved fulcrum contact line when viewed from the first axial direction, When viewed from the first axis direction, The bending contact surface of the bending guide that comes into contact with the mother yarn is Based on a virtual fulcrum tangent drawn from the upstream separation point where the mother yarn leaves the upstream guide to the fulcrum contact line, a spinning take-up machine, characterized in that the take-up machine is arranged on the same side as the fulcrum guide in a fulcrum normal direction perpendicular to the direction in which the fulcrum imaginary tangent extends and faces the opposite side to the fulcrum imaginary tangent.

2. In any cross section of the fulcrum guide that is parallel to the first axial direction and intersects with the fulcrum contact surface, The yarn take-off machine according to claim 1, wherein the fulcrum contact surface forms a line segment extending along the first axial direction or forms a curved line convex toward a yarn path side of the mother yarn.

3. The bending guide extends in a second axis direction along a horizontal direction, In any cross section of the bending guide that is parallel to the second axial direction and intersects with the bending contact surface, The yarn take-off machine according to claim 1 or 2, characterized in that the curved contact surface forms a line segment extending along the second axial direction or forms a curved line convex toward a yarn path side of the mother yarn.

4. 4. The yarn take-off machine according to claim 1, wherein the fulcrum guide is provided so as not to rotate while the mother yarn is running.

5. A package manufacturing method for manufacturing the package by the spinning yarn take-up machine according to any one of claims 1 to 4, A package manufacturing method, comprising winding the mother yarn around the bobbin without entangling the mother yarn to form the package.

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