EP4411034A1

EP4411034A1 - Yarn production system

Info

Publication number: EP4411034A1
Application number: EP23220475.0A
Authority: EP
Inventors: Kinzo Hashimoto; Jumpei Suzuki; Mako OKAZAKI
Original assignee: TMT Machinery Inc
Current assignee: TMT Machinery Inc
Priority date: 2023-01-26
Filing date: 2023-12-28
Publication date: 2024-08-07
Also published as: JP2024106313A; CN118390175A

Abstract

An object of the present invention is to efficiently apply oil to filaments in a structure in which the filaments are spun out downward from a single spinneret, divided into two groups, and bundled as two yarns.A yarn production system 1 includes (i) a spinning apparatus 2 including a spinneret 24 provided with discharge ports 26, (ii) a cooler 4 provided below the spinneret 24, and (iii) an oiling unit 5 provided below the cooler 4. A virtual partitioning plane X divides the discharge ports 26 into a first discharge port group 26A and a second discharge port group 26B. The first discharge port group is arranged so that (i) discharge ports belonging to the first discharge port group form at least one first line extending in the front-rear direction (predetermined width direction) and at least one second line extending in a direction intersecting with the front-rear direction, (ii) one of the at least one first line has more discharge ports than the at least one first line, (iii) one of the at least one second line has more discharge ports than the at least one second line, and (iv) the one of the at least one first line is larger than the one of the at least one second line in terms of the number of the discharge ports, and the second discharge port group is arranged so that (i) discharge ports belonging to the second discharge port group form at least one first line extending in the front-rear direction (predetermined width direction) and at least one second line extending in the direction intersecting with the front-rear direction, (ii) one of the at least one first line has more discharge ports than the at least one first line, (iii) one of the at least one second line has more discharge ports than the at least one second line, and (iv) the one of the at least one first line is larger than the one of the at least one second line in terms of the number of the discharge ports. The oiling unit 5 includes a first oil supply surface 52a and a second oil supply surface 52b. When viewed in the up-down direction, an angle between a first width direction D1 and the virtual partitioning plane X is within the range of 45 to -45 degrees. When viewed in the up-down direction, an angle between a second width direction D2 and the virtual partitioning plane X is within the range of 45 to -45 degrees.

Description

BACKGROUND OF THE INVENTION

The present invention relates to a yarn production system structured so that filaments are spun out downward from a single spinneret, divided into two groups, and bundled as two yarns.
A known yarn production system includes (i) a spinning apparatus configured to spin out yarns downward from spinnerets provided at a lower end portion of the spinning apparatus and (ii) an oiling unit configured to apply oil to the yarns spun out from the spinning apparatus. Each spinneret is provided with discharge ports through which filaments are spun out. The filaments spun out from the discharge ports are bundled as the yarns.
For example, Patent Literature 1 ( Japanese Laid-Open Patent Publication No. H10-245713 ) discloses that filaments are spun out downward from a single spinneret, divided into two groups, and bundled as two yarns in order to improve the production efficiency. An oiling unit (an oil supply guide of Patent Literature 1) is provided below the spinneret in order to apply oil to the two yarns. The oiling unit includes (i) two oil supply surfaces (yarn contact surfaces of Patent Literature 1) with which the yarns respectively make contact while running downward and (ii) two oil discharge holes through which oil is discharged. Each oil supply surface extends in an up-down direction and a width direction which is a horizontal direction. The oil is discharged from the oil discharge holes, flows along the oil supply surfaces, and is applied to the two yarns running while being in contact with the oil supply surfaces. Patent Literature 2 ( Japanese Laid-Open Patent Publication No. H6-93509 ) discloses that (i) filaments are spun out downward from a single spinneret, divided into plural (four in FIG. 1 of Patent Literature 2) groups, and bundled as yarns and (ii) oil is applied to the yarns by plural oiling units (four guide oiling nozzles of Patent Literature 2).
For example, there is a known circular spinneret provided with discharge ports across its entirety. For example, when filaments are spun out downward from a single spinneret, divided into two groups, and bundled as two yarns as in Patent Literature 1, the discharge ports provided with the circular spinneret are arranged as described below. The discharge ports are divided by a virtual partitioning plane into a first discharge port group for spinning out filaments forming one of the two yarns and a second discharge port group for spinning out filaments forming the other of the two yarns. The virtual partitioning plane extends in a vertical direction and a width direction of oil supply surfaces which is the horizontal direction. The discharge ports of the first discharge port group are arranged to roughly form a semi-circle, and the discharge ports of the second discharge port group are arranged to roughly form a semi-circle. With this arrangement, when viewed in the vertical direction, (i) the filaments spun out from the first discharge port group run downward toward an oil supply surface of an oiling unit while being arranged to roughly form a semi-circle and (ii) the filaments spun out from the second discharge port group run downward toward an oil supply surface of an oiling unit while being arranged to roughly form a semi-circle.

SUMMARY OF THE INVENTION

When (i) filaments running while being arranged to roughly form a semi-circle are viewed in the vertical direction and most widely dispersed in one direction (a direction of the virtual partitioning plane extending horizontally, i.e., a diameter direction of each semicircular discharge port group) and (ii) the one direction intersects with the width direction of the oil supply surfaces at a large angle, the following problem occurs. In this case, when the running filaments make contact with the oil supply surfaces, the filaments are not widely dispersed. That is, the filaments make contact with the oil supply surfaces while many of the filaments overlap one another (detailed later). In other words, many of the filaments overlap one another so as not to directly make contact with the oil supply surfaces. To the filaments which cannot directly make contact with the oil supply surfaces, oil which is discharged from oil discharge holes and which flows along the oil supply surfaces is not properly applied. Especially, the larger an angle formed between the virtual partitioning plane and the width direction of the oil supply surfaces is, the more filaments overlap one another and make contact with the oil supply surfaces. In this regard, the virtual partitioning plane is viewed in the vertical direction. When the filaments cannot directly make contact with the oil supply surfaces and the oil is not properly applied to these filaments, the quality of yarns formed of these filaments is deteriorated.
In Patent Literature 1, when the distance between the two oil supply surfaces is long, the quality of the two yarns formed of the filaments may be deteriorated. The following will describe the details. Typically, a cooler is provided between the spinneret and the oiling unit so that the filaments are blown by cooling wind from their surroundings. When the filaments are evenly blown by the cooling wind from the cooler, the quality of the yarns formed of the filaments is maintained. When the distance between the two oil supply surfaces is long as described above, a large space is formed between (i) filaments spun out from the first discharge port group of the spinneret and run toward one oil supply surface and (ii) filaments spun out from the second discharge port group of the spinneret and run toward the other oil supply surface. As the cooling wind enters the space from the cooler, the disturbance of airflows occurs in the space. This disturbs the cooling wind blowing the filaments, and thus each filament is easily cooled at some parts and improperly cooled at other parts in a circumferential direction of the filament. Because of this, the filaments are unevenly cooled by means of the cooling wind. As a result, the quality of the yarns formed of the filaments is deteriorated.
An object of the present invention is to effectively apply oil to filaments and to properly cool the filaments in a structure in which the filaments are spun out downward from a single spinneret, divided into two groups, and bundled as two yarns.
A yarn production system of the present invention comprises: a spinning apparatus including a spinneret provided with discharge ports through which filaments are spun out downward; a cooler which is provided below the spinneret and which is configured to cool the filaments by means of cooling wind; and an oiling unit which is provided below the cooler and which is configured to apply oil to a first yarn and a second yarn, the filaments being divided into two groups and bundled as the first yarn and the second yarn. In this regard, by a virtual partitioning plane extending in a vertical direction and a predetermined width direction intersecting with the vertical direction, the discharge ports are divided into a first discharge port group through which filaments forming the first yarn are spun out and a second discharge port group through which filaments forming the second yarn are spun out, the first discharge port group is arranged so that (i) discharge ports belonging to the first discharge port group form at least one first line extending in the predetermined width direction and at least one second line extending in a direction intersecting with the predetermined width direction, (ii) one of the at least one first line has more discharge ports than the at least one first line, (iii) one of the at least one second line has more discharge ports than the at least one second line, and (iv) the one of the at least one first line is larger than the one of the at least one second line in terms of the number of the discharge ports, and the second discharge port group is arranged so that (i) discharge ports belonging to the second discharge port group form at least one first line extending in the predetermined width direction and at least one second line extending in the direction intersecting with the predetermined width direction, (ii) one of the at least one first line has more discharge ports than the at least one first line, (iii) one of the at least one second line has more discharge ports than the at least one second line, and (iv) the one of the at least one first line is larger than the one of the at least one second line in terms of the number of the discharge ports. Furthermore, the oiling unit includes: a first oil supply surface with which the running filaments forming the first yarn make contact; and a second oil supply surface with which the running filaments forming the second yarn make contact, the first oil supply surface extends in an up-down direction and a predetermined first width direction which is a horizontal direction, and the second oil supply surface extends in the up-down direction and a predetermined second width direction which is the horizontal direction. When an angle between the first width direction and the virtual partitioning plane viewed in the vertical direction is 0 degree in a case where (i) the first width direction is in parallel to the virtual partitioning plane and (ii) the first oil supply surface faces the virtual partitioning plane, the angle between the first width direction and the virtual partitioning plane viewed in the vertical direction is within the range of 45 to -45 degrees. When an angle between the second width direction and the virtual partitioning plane viewed in the vertical direction is 0 degree in a case where (i) the second width direction is in parallel to the virtual partitioning plane and (ii) the second oil supply surface faces the virtual partitioning plane, the angle between the second width direction and the virtual partitioning plane viewed in the vertical direction is within the range of 45 to -45 degrees, and the distance between the center of the first oil supply surface and the center of the second oil supply surface in the horizontal direction is shorter than the distance between the barycentric position of the first discharge port group and the barycentric position of the second discharge port group in the horizontal direction. When the angle between the first width direction and the virtual partitioning plane is viewed in the vertical direction and 45 degrees, the first width direction is inclined from the virtual partitioning plane at 45 degrees clockwise. When the angle between the first width direction and the virtual partitioning plane is viewed in the vertical direction and -45 degrees, the first width direction is inclined from the virtual partitioning plane at 45 degrees counterclockwise. When the angle between the second width direction and the virtual partitioning plane is viewed in the vertical direction and 45 degrees, the second width direction is inclined from the virtual partitioning plane at 45 degrees clockwise. When the angle between the second width direction and the virtual partitioning plane is viewed in the vertical direction and -45 degrees, the second width direction is inclined from the virtual partitioning plane at 45 degrees counterclockwise.
In the present invention, each of the first discharge port group and the second discharge port group is arranged so that (i) discharge ports belonging to the first discharge port group form at least one first line extending in the predetermined width direction and at least one second line extending in the direction intersecting with the predetermined width direction, (ii) one of the at least one first line has more discharge ports than the at least one first line, (iii) one of the at least one second line has more discharge ports than the at least one second line, and (iv) the one of the at least one first line is larger than the one of the at least one second line in terms of the number of the discharge ports. When viewed in the vertical direction, the filaments spun out from the first discharge port group and the filaments spun out from the second discharge port group run downward toward the oiling unit while being aligned in the predetermined width direction in which the filaments are most widely dispersed in the predetermined width direction and in which the virtual partitioning plane extends. According to the present invention, when viewed in the vertical direction, each of (i) the angle between the first width direction and the virtual partitioning plane and (ii) the angle between the second width direction and the virtual partitioning plane is within the range of 45 to -45 degrees. Because of this, when viewed in the vertical direction, an angle between a direction in which the filaments spun out from the first discharge port group are most widely dispersed (i.e., the predetermined width direction) and the first width direction of the first oil supply surface is arranged to be as small as possible. Similarly, an angle between a direction in which the filaments spun out from the second discharge port group are most widely dispersed (i.e., the predetermined width direction) and the second width direction of the second oil supply surface is arranged to be as small as possible. As a result, filaments spun out from each discharge port group make contact with a corresponding oil supply surface while the filaments are dispersed as widely as possible. This reduces the overlap between the filaments so as to maximize the number of filaments which directly make contact with each oil supply surface. It is therefore possible to efficiently apply oil to the filaments.
Assume that, when (i) the first width direction is in parallel to the virtual partitioning plane and (ii) the first oil supply surface faces the virtual partitioning plane in the present invention, the angle between the first width direction and the virtual partitioning plane viewed in the vertical direction is 0 degree. With this premise, the angle between the first width direction and the virtual partitioning plane is within the range of 45 to -45 degrees. Assume that, when (i) the second width direction is in parallel to the virtual partitioning plane and (ii) the second oil supply surface faces the virtual partitioning plane in the present invention, the angle between the second width direction and the virtual partitioning plane viewed in the vertical direction is 0 degree. With this premise, the angle between the second width direction and the virtual partitioning plane is within the range of 45 to -45 degrees. In other words, the first oil supply surface is provided to face the second oil supply surface, and no component is provided between these two oil supply surfaces. With this arrangement, these two oil supply surfaces are arranged to be as close to each other as possible. In regard to the two oil supply surfaces which are close to each other, the distance between the center of the first oil supply surface and that of the second oil supply surface in the horizontal direction is shorter than the distance between the barycentric position of the first discharge port group and that of the second discharge port group in the horizontal direction. With this arrangement, the filaments spun out from the first discharge port group are converged at the first oil supply surface, and the filaments spun out from the second discharge port group are converged at the second oil supply surface. In other words, intervals of the filaments in contact with the first oil supply surface and the filaments in contact with the second oil supply surface are narrowed in the horizontal direction. It is therefore possible to reduce a space formed between the spinneret, the oiling unit, the filaments spun out from the first discharge port group, and the filaments spun out from the second discharge port group. This suppresses the disturbance of airflows caused by the inflow of the cooling wind from the cooler into the space, and thus each filament is evenly cooled. As a result, the filaments are properly cooled so that the quality of the two yarns formed of the filaments is maintained.
In the yarn production system of the present invention, preferably, when viewed in the vertical direction, the angle between the first width direction and the virtual partitioning plane is the same as the angle between the second width direction and the virtual partitioning plane.
According to the present invention, the filaments spun out from the first discharge port group are widely dispersed with respect to the first oil supply surface to the same extent as the filaments spun out from the second discharge port group are widely dispersed with respect to the second oil supply surface. With this arrangement, the filaments spun out from the first discharge port group is equal to the filaments spun out from the second discharge port group in regard to the efficiency of application of oil supplied from each oil supply surface. It is therefore possible to equalize the quality of the two yarns spun out from the two discharge port groups of the spinneret.
In the yarn production system of the present invention, preferably, when viewed in the vertical direction, the first discharge port group and the second discharge port group are line-symmetric about the virtual partitioning plane and the first oil supply surface and the second oil supply surface are line-symmetric about the virtual partitioning plane.
The filaments spun out from the two discharge port groups of the spinneret are cooled by means of the cooling wind supplied from the cooler provided between the spinning apparatus and the oiling unit. According to the present invention, the following paths are plane-symmetric about the virtual partitioning plane: a path of the filaments from the first discharge port group to the first oil supply surface; and a path of the filaments from the second discharge port group to the second oil supply surface. With this arrangement, the filaments spun out from the first discharge port group are identical with the filaments spun out from the second discharge port group in regard to the length of a path on which the filaments are blown by the cooling wind from the cooler provided between the spinning apparatus and the oiling unit. It is therefore possible to equalize the quality of the two yarns formed of the filaments spun out from the two discharge port groups of the spinneret.
In the yarn production system of the present invention, preferably, the oiling unit includes: a first oil supply guide provided with the first oil supply surface; and a second oil supply guide provided with the second oil supply surface, a take-up roller for taking up the first yarn and the second yarn is provided downstream of the oiling unit in a yarn running direction in which the first yarn and the second yarn run, the first oil supply guide and the second oil supply guide are movable between regulation positions and yarn threading positions, the first oil supply guide is moved to one of the regulation positions when the first yarn is taken up by the take-up roller and to one of the yarn threading positions when the first yarn is threaded to the first oil supply guide, the second oil supply guide is moved to the other of the regulation positions when the second yarn is taken up by the take-up roller and to the other of the yarn threading positions when the second yarn is threaded to the second oil supply guide, and the distance between the first oil supply guide at the one of the yarn threading positions and the second oil supply guide at the other of the yarn threading positions is longer than the distance between the first oil supply guide at the one of the regulation positions and the second oil supply guide at the other of the regulation positions.
The distance between the first oil supply guide at the one of the yarn threading positions and the second oil supply guide at the other of the yarn threading positions is longer than the distance between the first oil supply guide at the one of the regulation positions and the second oil supply guide at the other of the regulation positions. With this arrangement, the yarns are easily threaded to the respective oil supply guides by moving the first oil supply guide and the second oil supply guide to the yarn threading positions.
In the yarn production system of the present invention, preferably, the cooler is an annular cooler in which the entire circumference of each of the running filaments is blown by the cooling wind.
When the entire circumference of the each of the filaments is blown by the cooling wind from the annular cooler, a lot of the cooling wind easily enters the space formed between the filament groups running between the spinneret and the oil supply guide. Because of this, the disturbance of airflows easily occurs in the space. In the present invention, the annular cooler makes it possible to effectively suppress the disturbance of airflows caused by the inflow of the cooling wind from the cooler into the space. It is therefore possible to further properly cool the filaments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a profile of a yarn production system of an embodiment.
FIG. 2 is a partial cross section of a spinning apparatus and a cooler in the present embodiment.
FIG. 3 is a bottom view of one spinneret of the present embodiment.
FIG. 4 shows the spinneret and one oiling unit provided below the spinneret.
FIG. 5 is a top view of oil supply guides of the present embodiment.
FIG. 6 is a reference drawing for explaining an object of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(Overall Structure of Yarn Production System 1)

The following will describe a preferred embodiment of the present invention with reference to figures. FIG. 1 is a profile of a yarn production system 1 of the present embodiment. FIG. 2 is a partial cross section of a spinning apparatus 2 and a cooler 4. FIG. 3 is a bottom view of one spinneret 24. FIG. 4 shows one of spinnerets 24 and an oiling unit 5 provided below the one of spinnerets 24. FIG. 5 is a top view of oil supply guides 51. Hereinafter, front-rear, left-right, and up-down directions in FIG. 1 will be referred to as front-rear, left-right, and up-down directions of the yarn production system 1. The up-down direction is a vertical direction of the present invention, and is a direction in which the gravity acts.
As shown in FIG. 1, the yarn production system 1 includes the spinning apparatus 2 and a spun yarn take-up apparatus 3. The spinning apparatus 2 is configured to spin out molten polymer downward as yarns Y. The spun yarn take-up apparatus 3 is configured to take up the yarns Y spun out from the spinning apparatus 2 and includes the cooler 4, oiling units 5, yarn path regulatory guides 6, a comb teeth guide 7, godet rollers 8 and 9, and a spun yarn take-up winding apparatus 10.
As shown in FIG. 2, the spinning apparatus 2 includes a spinning beam 21, spinning packs 22 attached to a housing formed at a lower portion of the spinning beam 21, and a polymer tank 23 housing polymer which is a material of the yarns Y. The spinning beam 21 is able to heat, e.g., (i) the spinning packs 22 provided therein, (ii) the polymer tank 23, and (iii) polymer pipes 25 connecting the spinning packs 22 to the polymer tank 23. For example, the spinning beam 21 is rectangular in plan view and long in the left-right direction. The spinning packs 22 are staggered to form two lines with respect to the spinning beam 21 which is rectangular in plan view. In other words, the spinning packs 22 are provided to form two lines in the front-rear direction of the rectangular spinning beam 21 and, in the left-right direction, the positions of spinning packs 22 forming the front line are different from those of spinning packs 22 forming the rear line.
Each spinning pack 22 stores molten polymer therein and has a spinneret 24 at its lower end portion. In the present embodiment, each spinneret 24 is configured to spin out (see FIG. 4) filaments F forming two yarns Y (hereinafter, these yarns Y may be referred to as a first yarn Y1 and a second yarn Y2). As shown in FIG. 3, each spinneret 24 is substantially circular in shape when viewed from below. The diameter of each spinneret 24 is, e.g., 85 mm. Throughout each spinneret 24, discharge ports 26 are provided in order to spin out the filaments F downward. To be more specific, the discharge ports 26 are aligned in the front-rear direction and the left-right direction. For example, each spinneret 24 is provided with 144 discharge ports 26. The molten polymer stored in each spinning pack 22 is spun out, as the filaments F, downward from the discharge ports 26 provided at each spinneret 24.
As shown in FIG. 3, the discharge ports 26 are divided into a first discharge port group 26A provided for spinning out filaments F forming the first yarn Y1 (see FIG. 4) and a second discharge port group 26B provided for spinning out filaments F forming the second yarn Y2 (see FIG. 4). To be more specific, a virtual partitioning plane X extending in the front-rear direction (a predetermined width direction of the present invention) and the up-down direction divides the discharge ports 26 into the first discharge port group 26A and the second discharge port group 26B (see FIG. 3 and FIG. 4). As shown in FIG. 3, when viewed in the up-down direction, the first discharge port group 26A and the second discharge port group 26B are line-symmetric about the virtual partitioning plane X. The first discharge port group 26A is formed of 72 discharge ports 26. As shown in FIG. 3, the first discharge port group 26A is arranged so that (i) discharge ports 26 belonging to the first discharge port group 26A form first lines extending along the front-rear direction and second lines extending in a direction (the left-rear direction, an oblique direction, or the like) intersecting with the front-rear direction, i.e., in a direction different from the front-rear direction, (ii) one of the first lines has more discharge ports 26 than the first lines, (iii) one of the second lines has more discharge ports 26 than the second lines, and (iv) the one of the first lines is larger than the one of the second lines in terms of the number of the discharge ports 26. The second discharge port group 26B is formed of 72 discharge ports 26. As shown in FIG. 3, the second discharge port group 26B is arranged so that (i) discharge ports 26 belonging to the second discharge port group 26B form first lines extending along the front-rear direction and second lines extending in a direction (the left-rear direction, an oblique direction, or the like) intersecting with the front-rear direction, i.e., in a direction different from the front-rear direction, (ii) one of the first lines has more discharge ports 26 than the first lines, (iii) one of the second lines has more discharge ports 26 than the second lines, and (iv) the one of the first lines is larger than the one of the second lines in terms of the number of the discharge ports 26. As shown in FIG. 4, the filaments F spun out from the first discharge port group 26A are bundled as the first yarn Y1. The filaments F spun out from the second discharge port group 26B are bundled as the second yarn Y2. That is, the filaments F spun out from each spinneret 24 are divided into two groups and bundled as two yarns Y (the first yarn Y1 and the second yarn Y2).
The polymer tank 23 is configured to store polymer therein, and the polymer in the polymer tank 23 is sent to the spinning packs 22 through the polymer pipes 25. When the polymer is sent to the spinning packs 22 from the polymer tank 23, the polymer in the polymer tank 23 and the polymer pipes 25 is heated at a predetermined temperature by the spinning beam 21, with the result that molten polymer is made.
The cooler 4 is configured to cool the yarns Y spun out from the spinning packs 22 by means of cooling wind. To be more specific, the cooler 4 is configured to cool filaments F spun out from the spinnerets 24 formed at lower end portions of the spinning packs 22 by means of the cooling wind. The cooler 4 is an annular cooler in which the entire circumference of each running filament F is blown by the cooling wind. As shown in FIG. 2, the cooler 4 is provided below the spinning beam 21 and includes cooling cylinders 41 and a cooling wind supplying box 42 housing the cooling cylinders 41. The cooling cylinders 41 are provided immediately below the respective spinning packs 22. Each cooling cylinder 41 extends in the up-down direction, is hollow and substantially cylindrical in shape, is open at its both ends in the up-down direction, and is provided with a yarn running space 43 therein. A part of the cooling cylinder 41 defines a yarn running space 43, and adjusts the cooling wind flowing into the yarn running space 43 from an internal space 44 of the cooling wind supplying box 42. Each internal space 44 is provided across the entire circumferential direction of the yarn running space 43. The cooling wind is sent to each of internal spaces 44 of the cooling wind supplying box 42 from an unillustrated duct through an unillustrated cooling air pipe. In FIG. 2, the cooling air pipe is provided behind the cooler 4 in the direction orthogonal to the plane (i.e., the front-rear direction).
The oiling units 5 are configured to apply oil to yarns Y spun out downward from the spinning packs 22. To be more specific, each oiling unit 5 is configured to apply oil to filaments F which are divided into two groups and bundled as two yarns Y (the first yarn Y1 and the second yarn Y2). As shown in FIG. 2, the oiling units 5 are provided immediately below the cooling cylinders 41. The oiling units 5 are provided to correspond to the respective spinning packs 22.
Each oiling unit 5 includes two oil supply guides 51 to which two filament groups are respectively threaded. The two filament groups are formed of the filaments F forming the two yarns Y (the first yarn Y1 and the second yarn Y2) spun out from a single spinneret 24. To be more specific, as the two oil supply guides 51, each oiling unit 5 includes (i) a first oil supply guide 51a to which filaments F (hereinafter, this will be referred to as a first filament group) spun out from the first discharge port group 26A are threaded and (ii) a second oil supply guide 51b to which filaments F (hereinafter, this will be referred to as a second filament group) spun out from the second discharge port group 26B are threaded. When viewed in the up-down direction, (i) the first oil supply guide 51a is provided on the same side as the first discharge port group 26A with respect to the virtual partitioning plane X and (ii) the second oil supply guide 51b is provided on the same side as the second discharge port group 26B with respect to the virtual partitioning plane X. To be more specific, the first oil supply guide 51a is provided substantially and immediately below a barycentric position of the first discharge port group 26A. Assume that (i) each discharge port 26 belonging to the first discharge port group 26A has its own weight and (ii) the discharge ports 26 of the first discharge port group 26A are equal to one another in weight. In this case, when viewed in the up-down direction, the barycentric position of the first discharge port group 26A is the barycentric position (centroid) of centers of the discharge ports 26 of the first discharge port group 26A. In this regard, a single barycentric position is set with respect to the centers of the discharge ports 26 of the first discharge port group 26A. The second oil supply guide 51b is provided substantially and immediately below a barycentric position of the second discharge port group 26B. Assume that (i) each discharge port 26 belonging to the second discharge port group 26B has its own weight and (ii) the discharge ports 26 of the second discharge port group 26B are equal to one another in weight. In this case, when viewed in the up-down direction, the barycentric position of the second discharge port group 26B is the barycentric position (centroid) of centers of the discharge ports 26 of the second discharge port group 26B. In this regard, a single barycentric position is set with respect to the centers of the discharge ports 26 of the second discharge port group 26B.
The first oil supply guide 51a includes (see FIG. 5) (i) a first oil supply surface 52a with which the running filaments F forming the first yarn Y1 make contact and (ii) an oil discharge hole (not illustrated) through which oil is discharged. As shown in FIG. 5, the first oil supply surface 52a extends in the up-down direction and a predetermined first width direction D1 which is a horizontal direction. When viewed in the up-down direction, an angle between the first width direction D1 and the virtual partitioning plane X is within the range of 45 to -45 degrees. When the angle between the first width direction D1 and the virtual partitioning plane X is viewed in the up-down direction and 45 degrees, the first width direction D1 is inclined from the virtual partitioning plane X at 45 degrees clockwise. When the angle between the first width direction D1 and the virtual partitioning plane X is viewed in the up-down direction and -45 degrees, the first width direction D1 is inclined from the virtual partitioning plane X at 45 degrees counterclockwise. When the angle between the first width direction D1 and the virtual partitioning plane X is 0 degree, (i) the first width direction D1 is in parallel to the virtual partitioning plane X and (ii) the first oil supply surface 52a faces the virtual partitioning plane X. In the present embodiment, when viewed in the up-down direction, the angle between the first width direction D1 and the virtual partitioning plane X is 0 degree. In other words, both the first width direction D1 and the virtual partitioning plane X are in parallel to the front-rear direction in the present embodiment. The following will detail the angle between the first width direction D1 and the virtual partitioning plane X. Assume that, when (i) the first width direction D1 is in parallel to the virtual partitioning plane X and (ii) the first oil supply surface 52a faces the virtual partitioning plane X (see FIG. 5), the angle between the first width direction D1 and the virtual partitioning plane X viewed in the up-down direction is 0 degree. With this premise, the "angle between the first width direction D1 and the virtual partitioning plane X" is an angle between the first width direction D1 and the virtual partitioning plane X viewed in the up-down direction.
The first oil supply surface 52a is curved in the up-down direction (see FIG. 4). A dashed line of FIG. 5 shows a lower end of the first oil supply surface 52a which is curved in the up-down direction. The first oil supply surface 52a may not be curved but may extend in parallel to the up-down direction. The oil discharged from the oil discharge hole flows along the first oil supply surface 52a, and is applied to the filaments F forming the first yarn Y1 running while being in contact with the first oil supply surface 52a. The filaments F spun out from the first discharge port group 26A are oiled by the first oil supply guide 51a and then interlaced, etc. so as to form the first yarn Y1 which is a multi-filament yarn.
The second oil supply guide 51b includes (see FIG. 5) (i) a second oil supply surface 52b with which the running filaments F forming the second yarn Y2 make contact and (ii) an oil discharge hole (not illustrated) through which oil is discharged. As shown in FIG. 5, the second oil supply surface 52b extends in the up-down direction and a predetermined second width direction D2 which is the horizontal direction. When viewed in the up-down direction, an angle between the second width direction D2 and the virtual partitioning plane X is within the range of 45 to - 45 degrees. When the angle between the second width direction D2 and the virtual partitioning plane X is viewed in the up-down direction and 45 degrees, the second width direction D2 is inclined from the virtual partitioning plane X at 45 degrees clockwise. When the angle between the second width direction D2 and the virtual partitioning plane X is viewed in the up-down direction and -45 degrees, the second width direction D2 is inclined from the virtual partitioning plane X at 45 degrees counterclockwise. When the angle between the second width direction D2 and the virtual partitioning plane X is 0 degree, (i) the second width direction D2 is in parallel to the virtual partitioning plane X and (ii) the second oil supply surface 52b faces the virtual partitioning plane X. In the present embodiment, when viewed in the up-down direction, the angle between the second width direction D2 and the virtual partitioning plane X is 0 degree. In other words, both the second width direction D2 and the virtual partitioning plane X are in parallel to the front-rear direction in the present embodiment. The following will detail the angle between the second width direction D2 and the virtual partitioning plane X. Assume that, when (i) the second width direction D2 is in parallel to the virtual partitioning plane X and (ii) the second oil supply surface 52b faces the virtual partitioning plane X (see FIG. 5), the angle between the second width direction D2 and the virtual partitioning plane X viewed in the up-down direction is 0 degree. With this premise, the "angle between the second width direction D2 and the virtual partitioning plane X" is an angle between the second width direction D2 and the virtual partitioning plane X viewed in the up-down direction. Furthermore, when viewed in the up-down direction, the angle between the first width direction D1 and the virtual partitioning plane X is the same as the angle between the second width direction D2 and the virtual partitioning plane X.
The second oil supply surface 52b is curved in the up-down direction (see FIG. 4). A dashed line of FIG. 5 shows a lower end of the second oil supply surface 52b which is curved in the up-down direction. The second oil supply surface 52b may not be curved but may extend in parallel to the up-down direction. The oil discharged from the oil discharge hole flows along the second oil supply surface 52b, and is applied to the filaments F forming the second yarn Y2 running while being in contact with the second oil supply surface 52b. The filaments F spun out from the second discharge port group 26B are oiled by the second oil supply guide 51b and then interlaced, etc. so as to form the second yarn Y2 which is a multi-filament yarn.
As shown in FIG. 5, the first oil supply surface 52a is provided to face the second oil supply surface 52b. That is, the first oil supply surface 52a is oriented to the right, and the second oil supply surface 52b is oriented to the left. As shown in FIG. 5, when viewed in the up-down direction, the first oil supply surface 52a and the second oil supply surface 52b are line-symmetric about the virtual partitioning plane X.
The distance between the center of the first oil supply surface 52a and that of the second oil supply surface 52b in the left-right direction (the horizontal direction) is shorter than the distance between the barycentric position of the first discharge port group 26A and that of the second discharge port group 26B in the left-right direction (the horizontal direction). The distance between the center of the first oil supply surface 52a and that of the second oil supply surface 52b is the distance between an area where the first oil supply surface 52a makes contact with the filaments F and an area where the second oil supply surface 52b makes contact with the filaments F. The distance between the barycentric position of the first discharge port group 26A and that of the second discharge port group 26B is the distance between the barycentric position of the first discharge port group 26A viewed in the up-down direction and that of the second discharge port group 26B viewed in the up-down direction.
The first oil supply guide 51a and the second oil supply guide 51b are moved to regulation positions when the yarns Y are taken up by the godet rollers 8 and 9, and to yarn threading positions when the filament groups are threaded to the respective oil supply guides 51. The first oil supply guide 51a and the second oil supply guide 51b are movable between the respective regulation positions and the respective yarn threading positions. In the present embodiment, each oil supply guide 51 is movable between a regulation position and a yarn threading position by moving in the left-right direction (indicated by solid arrows in FIG. 4). To be more specific, the first oil supply guide 51a is moved leftward from the regulation position to the yarn threading position. The second oil supply guide 51b is moved rightward from the regulation position to the yarn threading position. The movement of each oil supply guide 51 between a regulation position and a yarn threading position may be performed by an unillustrated motor or may be manually performed by an operator. The distance between each two oil supply guides 51 (the first oil supply guide 51a and the second oil supply guide 51b) at the yarn threading positions is longer than the distance between the two oil supply guides 51 (the first oil supply guide 51a and the second oil supply guide 51b) at the regulation positions.
Each yarn path regulatory guide 6 is provided to regulate (define) a yarn path so that a yarn Y is properly pressed onto an oil supply surface of an oil supply guide 51. As shown in FIG. 2, two yarn path regulatory guides 6 are provided below each oiling unit 5. To be more specific, the two yarn path regulatory guides 6 are respectively provided below a first oil supply guide 51a and second oil supply guide 51b of the oiling unit 5. In this regard, a yarn path regulatory guide 6 provided below the first oil supply guide 51a regulates a yarn path so that the filaments F forming the first yarn Y1 are properly pressed onto the first oil supply surface 52a of the first oil supply guide 51a. A yarn path regulatory guide 6 provided below the second oil supply guide 51b regulates a yarn path so that the filaments F forming the second yarn Y2 are properly pressed onto the second oil supply surface 52b of the second oil supply guide 51b.
The comb teeth guide 7 is provided with grooves (not illustrated) which are formed at regular intervals in the left-right direction in order to guide yarns Y. Each groove of the comb teeth guide 7 is open at its both ends in the up-down direction and at its front or rear end. The comb teeth guide 7 is provided below an approximate center of the yarn path regulatory guides 6 in the left-right direction and the front-rear direction. The yarns Y are guided by the yarn path regulatory guides 6 and then by the grooves of the comb teeth guide 7, with the result that the yarns Y run downward while being aligned at regular intervals in the left-right direction.
Yarn threading to each oil supply guide 51, each yarn path regulatory guide 6, and the comb teeth guide 7 may be performed by the operator or may be automatically performed.
The godet rollers 8 and 9 are provided downstream of the comb teeth guide 7 in a yarn running direction as shown in FIG. 1, and are rotationally driven by unillustrated motors. The yarns Y spun out from the spinning apparatus 2 are wound onto the godet roller 8 and the godet roller 9 in this order after passing the yarn running spaces 43 of the cooler 4, the oiling units 5, the yarn path regulatory guides 6, and the comb teeth guide 7. The yarns Y are then sent to the spun yarn take-up winding apparatus 10 by the godet rollers 8 and 9. The godet rollers 8 and 9 are equivalent to a take-up roller of the present invention.
The spun yarn take-up winding apparatus 10 is configured to wind the yarns Y onto bobbins B retained by one bobbin holder 11, so as to form packages P. The spun yarn take-up winding apparatus 10 is provided with two bobbin holders 11. Each bobbin holder 11 is a shaft member extending in the front-rear direction, and is cantilevered at its rear end portion by a turret 13 provided on a frame 12. The bobbin holder 11 is able to retain the bobbins B which are aligned in its axial direction. For example, when eight yarns Y are sent from the spinning apparatus 2, the eight yarns Y are wound onto eight bobbins B.
The spun yarn take-up winding apparatus 10 includes a supporting frame 14 which extends in the front-rear direction and which is substantially in parallel to the bobbin holders 11. The supporting frame 14 is cantilevered at its rear end portion by the frame 12. At an upper part of the supporting frame 14, a guide supporter 15 is provided to extend in the front-rear direction. On the guide supporter 15, supporting guides 16 are aligned in the front-rear direction so as to correspond to the respective bobbins B retained by each bobbin holder 11. On the supporting frame 14, traverse devices 17 are aligned in the front-rear direction so as to correspond to the respective bobbins B retained by each bobbin holder 11. Each traverse device 17 is configured to traverse a yarn Y in the front-rear direction about a corresponding supporting guide 16.
The spun yarn take-up winding apparatus 10 further includes a contact roller 18 which is rotatably supported by the supporting frame 14. The contact roller 18 is provided below the supporting frame 14. Operations of the spun yarn take-up winding apparatus 10 are controlled by an unillustrated controller. The spun yarn take-up winding apparatus 10 is configured to start winding of the yarns Y, which are traversed by the traverse devices 17, onto new bobbins B attached to upper one of the two bobbin holders 11. While the yarns Y are wound, the contact roller 18 is suitably moved up or down and/or the turret 13 is suitably and rotationally driven. In this way, the packages P are formed in accordance with the increase in diameter of the packages P.

(Effects)

The yarn production system 1 of the present embodiment includes (i) the spinning apparatus 2 including each spinneret 24 provided with discharge ports 26 through which filaments F are spun out downward, (ii) the cooler 4 which is provided below the spinneret 24 and which is configured to cool the running filaments F by means of the cooling wind, and (iii) each oiling unit 5 which is provided below the cooler 4 and which is configured to apply oil to the filaments F which are divided into two groups and bundled as the first yarn Y1 and the second yarn Y2. In this regard, the virtual partitioning plane X extending in the up-down direction and the front-rear direction (predetermined width direction) intersecting with the up-down direction divides the discharge ports 26 into the first discharge port group 26A provided for spinning out filaments F forming the first yarn Y1 and the second discharge port group 26B provided for spinning out filaments F forming the second yarn Y2. In the yarn production system 1 of the present embodiment, the first discharge port group 26A is arranged so that (i) discharge ports 26 belonging to the first discharge port group 26A form first lines extending along the front-rear direction (predetermined width direction) and second lines extending in a direction intersecting with the front-rear direction, (ii) one of the first lines has more discharge ports 26 than the first lines, (iii) one of the second lines has more discharge ports 26 than the second lines, and (iv) the one of the first lines is larger than the one of the second lines in terms of the number of the discharge ports 26, and the second discharge port group 26B is arranged so that (i) discharge ports 26 belonging to the second discharge port group 26B form first lines extending along the front-rear direction (predetermined width direction) and second lines extending in the direction intersecting with the front-rear direction, i.e., in a direction different from the front-rear direction, (ii) one of the first lines has more discharge ports 26 than the first lines, (iii) one of the second lines has more discharge ports 26 than the second lines, and (iv) the one of the first lines is larger than the one of the second lines in terms of the number of the discharge ports 26. The oiling unit 5 includes the first oil supply surface 52a with which the running filaments F forming the first yarn Y1 make contact and the second oil supply surface 52b with which the running filaments F forming the second yarn Y2 make contact. The first oil supply surface 52a extends in the up-down direction and the predetermined first width direction D1 which is the horizontal direction, and the second oil supply surface 52b extends in the up-down direction and the predetermined second width direction D2 which is the horizontal direction. Assume that, when (i) the first width direction D1 is in parallel to the virtual partitioning plane X and (ii) the first oil supply surface 52a faces the virtual partitioning plane X, the angle between the first width direction D1 and the virtual partitioning plane X viewed in the up-down direction is 0 degree. With this premise, when viewed in the up-down direction, the angle between the first width direction D1 and the virtual partitioning plane X is within the range of 45 to -45 degrees. Assume that, when (i) the second width direction D2 is in parallel to the virtual partitioning plane X and (ii) the second oil supply surface 52b faces the virtual partitioning plane X, the angle between the second width direction D2 and the virtual partitioning plane X viewed in the up-down direction is 0 degree. With this premise, when viewed in the up-down direction, the angle between the second width direction D2 and the virtual partitioning plane X is within the range of 45 to -45 degrees. Furthermore, the distance between the center of the first oil supply surface 52a and that of the second oil supply surface 52b in the horizontal direction is shorter than the distance between the barycentric position of the first discharge port group 26A and that of the second discharge port group 26B in the horizontal direction.
Being different from the oiling unit 5 of the present embodiment, for example, an oiling unit may be structured as shown in FIG. 6. In this regard, the oiling unit of FIG. 6 will be referred to as an oiling unit 105. It should be noted that the components having the same structures as those of the oiling unit 5 of the present embodiment are given the same reference numerals. The oiling unit 105 includes a first oil supply guide 151a and a second oil supply guide 151b as two oil supply guides 151. The first oil supply guide 151a includes a first oil supply surface 152a with which the filaments F forming the first yarn Y1 make contact. The second oil supply guide 151b includes a second oil supply surface 152b with which the filaments F forming the second yarn Y2 make contact. The first oil supply surface 152a extends in the up-down direction and a predetermined first width direction D11 which is the horizontal direction. When viewed in the up-down direction, an angle between the virtual partitioning plane X and the first width direction D11 is 90 degrees. When the angle between the first width direction D11 and the virtual partitioning plane X is viewed in the up-down direction and 90 degrees, the first width direction D11 is inclined from the virtual partitioning plane X at 90 degrees clockwise. In other words, when viewed in the up-down direction, the virtual partitioning plane X is orthogonal to the first width direction D11. The first oil supply surface 152a is oriented to the front. The second oil supply surface 152b extends in the up-down direction and a predetermined second width direction D12 which is the horizontal direction. When viewed in the up-down direction, an angle between the virtual partitioning plane X and the second width direction D12 is -90 degrees. When the angle between the second width direction D12 and the virtual partitioning plane X is viewed in the up-down direction and -90 degrees, the second width direction D12 is inclined from the virtual partitioning plane X at 90 degrees counterclockwise. In other words, when viewed in the up-down direction, the virtual partitioning plane X is orthogonal to the second width direction D12. The second oil supply surface 152 is oriented to the front.
In the above-described oiling unit 105, filaments F spun out from the first discharge port group 26A of the circular spinneret 24 run while being arranged to roughly form a semi-circle, and a direction (a direction of the virtual partitioning plane X extending horizontally, i.e., the front-rear direction) in which these filaments F are most widely dispersed intersects with the first width direction D11 of the first oil supply surface 152a at a large angle (see FIG. 6). Similarly, filaments F spun out from the second discharge port group 26B of the circular spinneret 24 run while being arranged to roughly form a semi-circle, and a direction (the direction of the virtual partitioning plane X extending horizontally, i.e., the front-rear direction) in which these filaments F are most widely dispersed intersects with the second width direction D12 of the second oil supply surface 152b at a large angle (see FIG. 6). This may cause the following problems. As shown in FIG. 6, when the running filaments F make contact with the first oil supply surface 152a, the filaments F are not widely dispersed. That is, the filaments F make contact with the first oil supply surface 152a while many of the filaments F overlap one another. In other words, many of the filaments F overlap one another so as not to directly make contact with the first oil supply surface 152a. To the filaments F which cannot directly make contact with the first oil supply surface 152a, oil which is discharged from an oil discharge hole (not illustrated) and which flows along the first oil supply surface 152a is not properly applied. Especially, the larger an angle formed between the virtual partitioning plane X and the first width direction D11 of the first oil supply surface 152a is, the more filaments F overlap one another and make contact with the first oil supply surface 152a. In this regard, the virtual partitioning plane X is viewed in the up-down direction. The same applies to the second oil supply surface 152b. When many filaments F cannot directly make contact with the first oil supply surface 152a and the second oil supply surface 152b, oil is not properly applied to these filaments F. As a result, the quality of the yarns Y (the first yarn Y1 and the second yarn Y2) is deteriorated.
In the present embodiment, when viewed in the up-down direction, each of (i) the angle between the first width direction D1 and the virtual partitioning plane X and (ii) the angle between the second width direction D2 and the virtual partitioning plane X is within the range of 45 to - 45 degrees. Because of this, when viewed in the up-down direction, an angle between a direction in which the filaments F spun out from the first discharge port group 26A are most widely dispersed (i.e., the front-rear direction) and the first width direction D1 of the first oil supply surface 52a is arranged to be as small as possible. Similarly, an angle between a direction in which the filaments F spun out from the second discharge port group 26B are most widely arranged (i.e., the front-rear direction) and the second width direction D2 of the second oil supply surface 52b is arranged to be as small as possible. As a result, the filaments F spun out from each of the discharge port groups make contact with a corresponding oil supply surface while the filaments F are dispersed as widely as possible. This reduces the overlap between the filaments F so as to maximize the number of filaments F which directly make contact with each oil supply surface. It is therefore possible to efficiently apply oil to the filaments F.
Assume that, when (i) the first width direction D1 is in parallel to the virtual partitioning plane X and (ii) the first oil supply surface 52a faces the virtual partitioning plane X in the present embodiment, the angle between the first width direction D1 and the virtual partitioning plane X viewed in the up-down direction is 0 degree. With this premise, the angle between the first width direction D1 and the virtual partitioning plane X is within the range of 45 to -45 degrees. Assume that, when (i) the second width direction D2 is in parallel to the virtual partitioning plane X and (ii) the second oil supply surface 52b faces the virtual partitioning plane X in the present embodiment, the angle between the second width direction D2 and the virtual partitioning plane X viewed in the up-down direction is 0 degree. With this premise, the angle between the second width direction D2 and the virtual partitioning plane X is within the range of 45 to -45 degrees. In other words, the first oil supply surface 52a is provided to face the second oil supply surface 52b, and no component is provided between the two oil supply surfaces 52a and 52b. With this arrangement, the first oil supply surface 52a is arranged to be as close to the second oil supply surface 52b as possible. In regard to the two oil supply surfaces 52a and 52b which are close to each other, the distance between the center of the first oil supply surface 52a and that of the second oil supply surface 52b in the horizontal direction is shorter than the distance between the barycentric position of the first discharge port group 26A and that of the second discharge port group 26B in the horizontal direction. With this arrangement, the filaments F spun out from the first discharge port group 26A are converged at the first oil supply surface 52a, and the filaments F spun out from the second discharge port group 26B are converged at the second oil supply surface 52b. In other words, intervals of the filaments F in contact with the first oil supply surface 52a and the filaments F in contact with the second oil supply surface 52b are narrowed in the left-right direction. It is therefore possible to reduce a space formed between the spinneret 24 and the oiling unit 5 and between the filaments F spun out from the first discharge port group 26A and the filaments F spun out from the second discharge port group 26B. This suppresses the disturbance of airflows caused by the inflow of the cooling wind from the cooler 4 into the space, and thus each filament F is evenly cooled. As a result, the filaments F are properly cooled so that the quality of the two yarns Y (the first yarn Y1 and the second yarn Y2) formed of the filaments F is maintained.
In the yarn production system 1 of the present embodiment, when viewed in the up-down direction, the angle between the first width direction D1 and the virtual partitioning plane X is the same as the angle between the second width direction D2 and the virtual partitioning plane X. With this arrangement, the filaments F spun out from the first discharge port group 26A are widely dispersed with respect to the first oil supply surface 52a to the same extent as the filaments F spun out from the second discharge port group 26B are widely dispersed with respect to the second oil supply surface 52b. As a result, the filaments F spun out from the first discharge port group 26A are equal to the filaments F spun out from the second discharge port group 26B in regard to the efficiency of application of oil supplied from each oil supply surface. It is therefore possible to equalize the quality of the two yarns Y (the first yarn Y1 and the second yarn Y2) spun out from the two discharge port groups of the spinneret 24.
In the yarn production system 1 of the present embodiment, when viewed in the up-down direction, (i) the first discharge port group 26A and the second discharge port group 26B are line-symmetric about the virtual partitioning plane X and (ii) the first oil supply surface 52a and the second oil supply surface 52b are line-symmetric about the virtual partitioning plane X. The filaments F spun out from the two discharge port groups of the spinneret 24 are cooled by means of the cooling wind supplied from the cooler 4 provided between the spinning apparatus 2 and the oiling unit 5. In the present embodiment, the following paths are plane-symmetric about the virtual partitioning plane X: a path of the filaments F from the first discharge port group 26A to the first oil supply surface 52a; and a path of the filaments F from the second discharge port group 26B to the second oil supply surface 52b. With this arrangement, the filaments F spun out from the first discharge port group 26A are identical with the filaments F spun out from the second discharge port group 26B in regard to the length of a path on which the filaments F are blown by the cooling wind from the cooler 4 provided between the spinning apparatus 2 and the oiling unit 5. It is therefore possible to equalize the quality of the two yarns Y (the first yarn Y1 and the second yarn Y2) formed of the filaments F spun out from the two discharge port groups of the spinneret 24.
In the yarn production system 1 of the present embodiment, the oiling unit 5 includes the first oil supply guide 51a including the first oil supply surface 52a and the second oil supply guide 51b including the second oil supply surface 52b. The godet rollers 8 and 9 for taking up the first yarn Y1 and the second yarn Y2 are provided downstream of the oiling unit 5 in the yarn running direction in which the first yarn Y1 and the second yarn Y2 run. The first oil supply guide 51a is moved to the regulation position when the first yarn Y1 is taken up by the godet rollers 8 and 9, and to the yarn threading position when the first yarn Y1 is threaded to the first oil supply guide 51a. The first oil supply guide 51a is movable between the regulation position and the yarn threading position. The second oil supply guide 51b is moved to the regulation position when the second yarn Y2 is taken up by the godet rollers 8 and 9, and to the yarn threading position when the second yarn Y2 is threaded to the second oil supply guide 51b. The second oil supply guide 51b is movable between the regulation position and the yarn threading position. The distance between the first oil supply guide 51a at the yarn threading position and the second oil supply guide 51b at the yarn threading position is longer than the distance between the first oil supply guide 51a at the regulation position and the second oil supply guide 51b at the regulation position. The distance between the first oil supply guide at the yarn threading position and the second oil supply guide at the yarn threading position is longer than the distance between the first oil supply guide at the regulation position and the second oil supply guide at the regulation position. With this arrangement, the yarns are easily threaded to the respective oil supply guides by moving the first oil supply guide and the second oil supply guide to the yarn threading positions.
In the yarn production system 1 of the present embodiment, the cooler 4 is an annular cooler in which the entire circumference of each running filament F is blown by the cooling wind. When the entire circumference of each filament F is blown by the cooling wind from the annular cooler, a lot of the cooling wind easily enters a space formed between the filament groups running between the spinneret 24 and the two oil supply guides 51. Because of this, the disturbance of airflows easily occurs in the space. In the present embodiment, the annular cooler makes it possible to effectively suppress the disturbance of airflows caused by the inflow of the cooling wind from the cooler 4 into the space. It is therefore possible to further properly cool the filaments F.

(Modifications)

The following will describe modifications of the above-described embodiment. The members identical with those in the embodiment above will be denoted by the same reference numerals and the explanations thereof are not repeated.
In the embodiment above, when viewed in the up-down direction, the angle between the first width direction D1 and the virtual partitioning plane X is 0 degree. However, the angle between the first width direction D1 and the virtual partitioning plane X may not be 0 degree as long as this angle is within the range of 45 to -45 degrees. The definition of 45 degrees and that of -45 degrees are described above. The same applies to the angle between the second width direction D2 and the virtual partitioning plane X.
In the embodiment above, when viewed in the up-down direction, the angle between the first width direction D1 and the virtual partitioning plane X is the same as the angle between the second width direction D2 and the virtual partitioning plane X. However, the angle between the first width direction D1 and the virtual partitioning plane X may be different from the angle between the second width direction D2 and the virtual partitioning plane X.
In the embodiment above, when viewed in the up-down direction, the first discharge port group 26A and the second discharge port group 26B are line-symmetric about the virtual partitioning plane X. However, for example, (i) the number of discharge ports belonging to the first discharge port group 26A may be different from that of discharge ports belonging to the second discharge port group 26B and (ii) the first discharge port group 26A and the second discharge port group 26B may not be line-symmetric about the virtual partitioning plane X viewed in the up-down direction.
In the embodiment above, when viewed in the up-down direction, the first oil supply surface 52a and the second oil supply surface 52b are line-symmetric about the virtual partitioning plane X. However, the first oil supply surface 52a and the second oil supply surface 52b may not be line-symmetric about the virtual partitioning plane X when viewed in the up-down direction.
In the embodiment above, the comb teeth guide 7 which is provided with the grooves (not illustrated) formed at regular intervals in the left-right direction is provided below the yarn path regulatory guides 6. However, a guide which is not a comb teeth guide may be provided below the yarn path regulatory guides 6. It is possible to use, e.g., a guide such as a U-shaped guide in which a single yarn running portion for guiding yarns Y is provided at a single guide member.
In the embodiment above, the spinning beam 21 is rectangular in plan view and long in the left-right direction. However, for example, the spinning beam 21 may be circular in plan view. In this case, the spinning packs 22 are provided along the circular spinning beam 21.
In the embodiment above, each oil supply guide 51 is movable between the regulation position and the yarn threading position. However, each oil supply guide 51 may be fixed at the regulation position.
In the embodiment above, the cooler 4 is an annular cooler. However, the cooler 4 may be structured so that each running filament F is partially blown by the cooling wind in the entire circumferential direction of the filament F.
In the embodiment above, each spinneret 24 is substantially circular in shape when viewed from below. However, the spinneret 24 may not be circular in shape. For example, the spinneret 24 may be polygonal in shape.
In the embodiment above, the first discharge port group 26A is arranged so that discharge ports 26 of the first discharge port group 26A form plural first lines extending in the front-rear direction. However, the first discharge port group 26A may be arranged so that discharge ports 26 of the first discharge port group 26A form a single first line extending in the front-rear direction. Furthermore, the second discharge port group 26B is arranged so that discharge ports 26 of the second discharge port group 26B form plural first lines extending in the front-rear direction. However, the second discharge port group 26B may be arranged so that discharge ports 26 of the second discharge port group 26B form a single first line extending in the front-rear direction.

Claims

A yarn production system (1) comprising: a spinning apparatus (2) including a spinneret (24) provided with discharge ports (26) through which filaments (F) are spun out downward;
a cooler (4) which is provided below the spinneret (24) and which is configured to cool the filaments (F) by means of cooling wind; and

an oiling unit (5) which is provided below the cooler (4) and which is configured to apply oil to a first yarn (Y1) and a second yarn (Y2), the filaments (F) being divided into two groups and bundled as the first yarn (Y1) and the second yarn (Y2),

the discharge ports (26) being divided into a first discharge port group (26A) through which filaments (F) forming the first yarn (Y1) are spun out and a second discharge port group (26B) through which filaments (F) forming the second yarn (Y2) are spun out, by a virtual partitioning plane (X) extending in a vertical direction and a predetermined width direction intersecting with the vertical direction,

the first discharge port group (26A) being arranged so that (i) discharge ports (26) belonging to the first discharge port group (26A) form at least one first line extending in the predetermined width direction and at least one second line extending in a direction intersecting with the predetermined width direction, (ii) one of the at least one first line has more discharge ports (26) than the at least one first line, (iii) one of the at least one second line has more discharge ports (26) than the at least one second line, and (iv) the one of the at least one first line is larger than the one of the at least one second line in terms of the number of the discharge ports,

the second discharge port group (26B) being arranged so that (i) discharge ports (26) belonging to the second discharge port group (26B) form at least one first line extending in the predetermined width direction and at least one second line extending in the direction intersecting with the predetermined width direction, (ii) one of the at least one first line has more discharge ports (26) than the at least one first line, (iii) one of the at least one second line has more discharge ports (26) than the at least one second line, and (iv) the one of the at least one first line is larger than the one of the at least one second line in terms of the number of the discharge ports,

the oiling unit (5) including: a first oil supply surface (52a) with which the running filaments (F) forming the first yarn (Y1) make contact; and a second oil supply surface (52b) with which the running filaments (F) forming the second yarn (Y2) make contact,

the first oil supply surface (52a) extending in an up-down direction and a predetermined first width direction (D1) which is a horizontal direction,

the second oil supply surface (52b) extending in the up-down direction and a predetermined second width direction (D2) which is the horizontal direction,

when an angle between the first width direction (D1) and the virtual partitioning plane (X) viewed in the vertical direction is 0 degree in a case where (i) the first width direction (D1) is in parallel to the virtual partitioning plane (X) and (ii) the first oil supply surface (52a) faces the virtual partitioning plane (X),

the angle between the first width direction (D1) and the virtual partitioning plane (X) viewed in the vertical direction being within the range of 45 to -45 degrees,

when an angle between the second width direction (D2) and the virtual partitioning plane (X) viewed in the vertical direction is 0 degree in a case where (i) the second width direction (D2) is in parallel to the virtual partitioning plane (X) and (ii) the second oil supply surface (52b) faces the virtual partitioning plane (X),

the angle between the second width direction (D2) and the virtual partitioning plane (X) viewed in the vertical direction being within the range of 45 to -45 degrees, and

the distance between the center of the first oil supply surface (52a) and the center of the second oil supply surface (52b) in the horizontal direction being shorter than the distance between the barycentric position of the first discharge port group (26A) and the barycentric position of the second discharge port group (26B) in the horizontal direction.
The yarn production system (1) according to claim 1, wherein, when viewed in the vertical direction, the angle between the first width direction (D1) and the virtual partitioning plane (X) is the same as the angle between the second width direction (D2) and the virtual partitioning plane (X).
The yarn production system (1) according to claim 1 or 2, wherein, when viewed in the vertical direction,
the first discharge port group (26A) and the second discharge port group (26B) are line-symmetric about the virtual partitioning plane (X) and

the first oil supply surface (52a) and the second oil supply surface (52b) are line-symmetric about the virtual partitioning plane (X).
The yarn production system (1) according to any one of claims 1 to 3, wherein, the oiling unit (5) includes: a first oil supply guide (51a) provided with the first oil supply surface (52a); and a second oil supply guide (51b) provided with the second oil supply surface (52b),
a take-up roller (8, 9) for taking up the first yarn (Y1) and the second yarn (Y2) is provided downstream of the oiling unit (5) in a yarn running direction in which the first yarn (Y1) and the second yarn (Y2) run,

the first oil supply guide (51a) and the second oil supply guide (51b) are movable between regulation positions and yarn threading positions, the first oil supply guide (51a) is moved to one of the regulation positions when the first yarn (Y1) is taken up by the take-up roller (8, 9) and to one of the yarn threading positions when the first yarn (Y1) is threaded to the first oil supply guide (51a),

the second oil supply guide (51b) is moved to the other of the regulation positions when the second yarn (Y2) is taken up by the take-up roller (8, 9) and to the other of the yarn threading positions when the second yarn (Y2) is threaded to the second oil supply guide (51b), and

the distance between the first oil supply guide (51a) at the one of the yarn threading positions and the second oil supply guide (51b) at the other of the yarn threading positions is longer than the distance between the first oil supply guide (51a) at the one of the regulation positions and the second oil supply guide (51b) at the other of the regulation positions.
The yarn production system (1) according to any one of claims 1 to 4, wherein, the cooler (4) is an annular cooler (4) in which the entire circumference of each of the running filaments (F) is blown by the cooling wind.