Yarn cooling device
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Filing Date
- 2026-01-27
- Publication Date
- 2026-04-28
Abstract
Description
Yarn Cooling Device
[0001] The present invention relates to a yarn cooling device that cools yarn spun downward from a spinning device.
[0002] In the field of melt spinning, a yarn cooling device that cools a yarn spun downward from a spinneret of a spinning device has been known. Such a yarn cooling device blows cooling air into a yarn traveling space below the spinneret, through which the yarn travels, to cool the yarn traveling in the yarn traveling space.
[0003] Patent Document 1 discloses a cross-flow cooling device that blows cooling air from one side of a predetermined horizontal direction into a yarn traveling space. In this cooling device, the cooling air passes horizontally across the yarn traveling space.
[0004] JP 2016-000884 A
[0005] Consider a case where, in the cooling device described above, a plurality of yarn traveling spaces are arranged horizontally and aligned in a direction perpendicular to the predetermined direction. In this case, part of the cooling air blown onto the yarn traveling spaces from one side in the predetermined direction passes between two adjacent yarn traveling spaces in the orthogonal direction. Since the cooling air passes through spaces other than the yarn traveling spaces, extra energy other than that used for cooling the yarn is consumed, making it impossible to efficiently cool the yarn.
[0006] An object of the present invention is to provide a yarn cooling device that can efficiently cool yarn.
[0007] A yarn cooling device according to a first aspect of the present invention is a yarn cooling device that cools a yarn spun downward from a spinneret of a spinning device, and includes a hollow box body arranged below the spinning device. When a space inside the box body through which the yarn spun from the spinneret travels is defined as a yarn traveling space and spaces located on both sides of the yarn traveling space in a predetermined horizontal direction are defined as a first space and a second space, the box body is provided with a first circulation section facing the first space and through which gas can flow, and a second circulation section facing the second space and through which gas can flow, and a plurality of the yarn traveling spaces are arranged side by side in an orthogonal direction perpendicular to the predetermined direction along the horizontal direction, and are arranged at least partially between two adjacent yarn traveling spaces in the orthogonal direction, and include a wall that partitions the first space and the second space.
[0008] In the present invention, when gas flows into the first space through the first flow section and is discharged from the second space through the second flow section, an airflow is generated from the first space to the second space. Furthermore, when gas flows into the second space through the second flow section and is discharged from the first space through the first flow section, an airflow is generated from the second space to the first space. Of these airflows from the first space to the second space or from the second space to the first space, at least a portion of the airflow flowing between two adjacent yarn traveling spaces in the orthogonal direction is guided to the yarn traveling spaces by the wall. Therefore, the amount of gas passing through the yarn traveling spaces can be increased compared to when there is no wall. This allows the yarn to be cooled efficiently.
[0009] In a yarn cooling device according to a second aspect of the present invention, in the first aspect, the wall entirely separates the two adjacent yarn traveling spaces.
[0010] In the present invention, two adjacent yarn traveling spaces are separated without any gap by a wall. Therefore, the airflow from the first space or the second space toward the space between the two adjacent yarn traveling spaces in the orthogonal direction is reliably guided by the wall to the yarn traveling space. This allows the yarn to be cooled more efficiently.
[0011] In a yarn cooling device according to a third aspect of the present invention, in the second aspect, a first yarn traveling space row consisting of the plurality of yarn traveling spaces lined up in the orthogonal direction and a second yarn traveling space row consisting of the plurality of yarn traveling spaces lined up in the orthogonal direction at a position different from the first yarn traveling space row in the predetermined direction, are formed, a space between the first yarn traveling space row and the second yarn traveling space row is defined as the first space, and a space located on the opposite side of the first space across the first yarn traveling space row in the predetermined direction and a space located on the opposite side of the first space across the second yarn traveling space row in the predetermined direction are defined as the second spaces.
[0012] In the present invention, the first space is a space shared by the yarn traveling spaces of the first yarn traveling space row and the second yarn traveling space row. This allows for a more compact device. Consider, for example, a case in which gas flows in from one side of the first yarn traveling space row and the second yarn traveling space row in a predetermined direction, and gas is discharged from the other side of the first yarn traveling space row and the second yarn traveling space row in the predetermined direction. In this case, cross-flow cooling can be performed by an airflow that passes through both the first yarn traveling space row and the second yarn traveling space row in order from one side to the other side in the predetermined direction. In this case, the cooling state differs significantly between the yarn traveling space row located upstream of the airflow and the yarn traveling space row located downstream of the airflow. In the present invention, a first flow section through which gas can flow is provided in the first space between the first yarn traveling space row and the second yarn traveling space row, and second flow sections through which gas can flow are provided in the second spaces on both sides of the first space. In this case, for example, when gas flows into the first space through the first flow section and is discharged from the second space through each second flow section, an air flow is generated that flows from the first space to each second space and passes through each row of yarn traveling spaces. Therefore, differences in the cooling state among the rows of yarn traveling spaces are unlikely to occur.
[0013] In the yarn cooling device according to a fourth aspect of the present invention, in the third aspect, the positions of the plurality of yarn traveling spaces belonging to the first yarn traveling space row and the positions of the plurality of yarn traveling spaces belonging to the second yarn traveling space row in the orthogonal direction are different.
[0014] In the present invention, the device can be made smaller in size in a specified direction compared to when the positions of the multiple yarn traveling spaces belonging to the first yarn traveling space row and the multiple yarn traveling spaces belonging to the second yarn traveling space row are the same in the perpendicular direction.
[0015] A yarn cooling device according to a fifth aspect of the present invention is the yarn cooling device according to any one of the second to fourth aspects of the present invention, and includes a plurality of cylinders defining the yarn traveling spaces and configured to allow gas to pass through in the horizontal direction. In this case, it is preferable that the walls are disposed on both sides of each of the cylinders in the orthogonal direction and connected to each of the cylinders.
[0016] In the present invention, the cylindrical body can prevent a significant deviation in the traveling trajectory of the yarn when an airflow is blown onto the yarn traveling in the yarn traveling space. Furthermore, the airflow traveling from the first space or the second space between two adjacent yarn traveling spaces in the orthogonal direction is reliably guided into the yarn traveling space inside the cylindrical body by the wall connected to the cylindrical body. Therefore, the yarn can be cooled more efficiently.
[0017] The yarn cooling device according to a sixth aspect of the present invention is any one of the first to fifth aspects of the present invention, further comprising an airflow generating unit capable of generating an airflow that flows into the interior of the box body through the first circulation part and is discharged from the interior of the box body through the second circulation part.
[0018] In the present invention, the gas passes horizontally across the yarn traveling space from the first space to the second space, thereby realizing cooling in the cross-flow direction.
[0019] The yarn cooling device according to a seventh aspect of the present invention is any one of the first to fifth aspects of the present invention, and further includes an airflow generating unit capable of generating an airflow that flows into the interior of the box body via the first circulation part and also flows into the interior of the box body via the second circulation part.
[0020] In the present invention, gas flows into the yarn traveling space from the periphery thereof, thereby realizing cooling by a circular cooling method.
[0021] 1 is a cross-sectional view of a melt spinning apparatus according to an embodiment; FIG. 2 is a cross-sectional view of a yarn cooling apparatus shown in FIG. 1 taken along line II-II; FIG. 3 is a cross-sectional view of a yarn cooling apparatus taken along line III-III in FIG. 2; FIG. 4 is a cross-sectional view of a yarn cooling apparatus taken along line II-II; FIG. 5 is a cross-sectional view of a yarn cooling apparatus taken along line III-III in FIG. 2; FIG. 6 is a cross-sectional view of a yarn cooling apparatus taken along line I-II; FIG. 7 is a cross-sectional view of a yarn cooling apparatus taken along line I-III; FIG. 8 is a cross-sectional view of a yarn cooling apparatus taken along line I-III; FIG. 9 is a cross-sectional view of a yarn cooling apparatus taken along line I-III; FIG. 10 is a cross-sectional view of a yarn cooling apparatus taken along line I-III; FIG. 11 is a cross-sectional view of a yarn cooling apparatus taken along line I-III; FIG. 12 is a cross-sectional view of a yarn cooling apparatus taken along line I-III; 10A is a cross-sectional view of a yarn cooling device according to a sixth modified example taken along a plane perpendicular to the up-down direction, and FIG. 10B is a cross-sectional view of a yarn cooling device according to a seventh modified example taken along a plane perpendicular to the left-right direction.
[0022] A preferred embodiment of the present invention will now be described with reference to the drawings.
[0023] (Overall configuration of melt spinning apparatus 1) First, with reference to Figure 1, the overall configuration of a melt spinning apparatus 1 to which a yarn cooling device according to the present invention is applied will be described. The up-down direction of the paper in Figure 1 is the up-down direction of the melt spinning apparatus 1 (the vertical direction in which gravity acts). The left-right direction of the paper in Figure 1 is the front-rear direction of the melt spinning apparatus 1. The direction perpendicular to the paper in Figure 1 is the left-rear direction of the melt spinning apparatus 1. The front-rear direction and the left-rear direction are both directions along the horizontal direction. The front-rear direction and the left-rear direction are perpendicular to each other. The melt spinning apparatus 1 comprises a spinning beam 2 (corresponding to the "spinning apparatus" in the present invention), a yarn cooling device 3, and an oil guide 4.
[0024] The spinning beam 2 is used to spin a plurality of synthetic resin yarns Y. The spinning beam 2 is provided with a plurality of pack housings 11. Each pack housing 11 defines a space that is open downward. A spinning pack 12 is attached to the inner space of each pack housing 11. A spinneret 13 having a plurality of nozzles 14 formed therein is disposed at the lower end of each spinning pack 12. When molten polymer is supplied to the spinning pack 12 from a pipe or the like (not shown), the molten polymer is spun as filaments f from the plurality of nozzles 14 of the spinneret 13. In other words, a single multifilament yarn Y composed of a plurality of filaments f is spun from one spinneret 13.
[0025] The yarn cooling device 3 is for cooling a plurality of filaments f (yarn Y) spun downward from the spinneret 13 of the spinning beam 2. The yarn cooling device 3 is disposed below the spinning beam 2. The detailed configuration of the yarn cooling device 3 will be described later.
[0026] The oil guide 4 is used to apply oil to the yarn Y. The oil guide 4 is disposed below the yarn cooling device 3. The yarn Y cooled by the yarn cooling device 3 comes into contact with the oil guide 4. At that time, the oil guide 4 ejects oil onto the yarn Y to apply the oil to the yarn Y. The yarn Y to which the oil has been applied by the oil guide 4 is wound onto a bobbin by a winding device (not shown) disposed below the oil guide 4, and a package is formed.
[0027] 2 and 3 , the configuration of the yarn cooling device 3 will be described. The yarn cooling device 3 includes a hollow storage box 20, a plurality of cooling cylinders 31 (corresponding to the "cylinders" of the present invention), a plurality of partition cylinders 32, and an airflow generating unit 70. The plurality of cooling cylinders 31 and the plurality of partition cylinders 32 are stored in the storage box 20.
[0028] The storage box 20 is disposed below the spinning beam 2. The storage box 20 is substantially rectangular parallelepiped-shaped. The inner space of the storage box 20 is divided into upper and lower parts by a first partition wall 21 disposed substantially horizontally. The first partition wall 21 is provided at the lower part of the storage box 20. In the following description, the part of the storage box 20 that defines the space above the first partition wall 21 in the inner space is referred to as the main box body 20a. The main box body 20a corresponds to the "box body" in the present invention. Furthermore, the part of the storage box 20 that defines the space below the first partition wall 21 in the inner space is referred to as the lower box body 20b.
[0029] The first partition wall 21 has a closing portion 21a made of a material that does not allow gas to pass through and a circulating portion 21b made of a material that allows gas to pass through. The circulating portion 21b is made of a material that has a flow-regulating function, such as punched metal. The circulating portion 21b may be an opening formed in the first partition wall 21. As will be described in detail later, the inner space of the main box body 20a is divided into one central space 51 and two side spaces 52, 53. As shown in FIG. 3 , the closing portion 21a is a portion of the first partition wall 21 that faces the two side spaces 52, 53. The circulating portion 21b is a portion of the first partition wall 21 that faces the central space 51. As shown in FIG. 2 , the circulating portion 21b extends across the entire length of the storage box 20 in the left-right direction. The circulating portion 21b corresponds to the "first circulating portion" in this invention.
[0030] A plurality of cooling cylinders 31 are disposed inside the main box body 20a. Each cooling cylinder 31 extends over the entire vertical length of the main box body 20a. The peripheral walls of the cooling cylinders 31 are configured to allow gas to flow horizontally. The peripheral walls of the cooling cylinders 31 are made of a material with a flow straightening function, such as punched metal.
[0031] A plurality of cooling cylinders 31 are provided corresponding to the plurality of spinning packs 12, respectively. Each cooling cylinder 31 extends in the vertical direction directly below a corresponding one of the spinning packs 12 (spinneret 13). The inner space of each cooling cylinder 31 includes a space facing the corresponding spinneret 13 below the spinning beam 2. A plurality of filaments f spun from the spinneret 13 travel through the inner space of the cooling cylinder 31. In the following description, the inner space of the cooling cylinder 31 (the space defined by the cooling cylinder 31) will be referred to as the yarn traveling space 31a.
[0032] The yarn traveling space 31a, which is the inner space of each cooling cylinder 31, is connected to the inner space of the pack housing 11 to which the corresponding spinning pack 12 is attached. In FIG. 1, the lower surface of the spinning beam 2 is in contact with the upper surface of the storage box 20. However, there is a case where an intervening member such as a packing is disposed between the spinning beam 2 and the storage box 20. Even in such a case, the yarn traveling space 31a is connected to the inner space of the pack housing 11 through the space formed in the intervening member. In other words, in this embodiment, the outside air is not allowed to flow into the yarn traveling space 31a between the spinning beam 2 and the storage box 20. The outside air may also be allowed to flow into the yarn traveling space 31a between the spinning beam 2 and the storage box 20.
[0033] The plurality of yarn traveling spaces 31a formed by the plurality of cooling cylinders 31 are arranged in accordance with the arrangement of the spinning packs 12. In this embodiment, the plurality of yarn traveling spaces 31a are arranged in two staggered rows along the left-right direction, as shown in FIG. 2 . More specifically, a first yarn traveling space row 41 and a second yarn traveling space row 42 are formed, each consisting of a plurality of yarn traveling spaces 31a arranged in the left-right direction (corresponding to the "orthogonal direction" in this invention). In this embodiment, the first yarn traveling space row 41 and the second yarn traveling space row 42 each consist of two yarn traveling spaces 31a. The first yarn traveling space row 41 and the second yarn traveling space row 42 are arranged at different positions in the front-rear direction. The plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 and the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42 are arranged at different positions in the left-right direction.
[0034] A plurality of partition cylinders 32 are disposed in the lower box body 20b. The partition cylinders 32 extend over the entire length of the lower box body 20b in the vertical direction. The peripheral walls of the partition cylinders 32 are made of a material that does not allow gas to pass through. A plurality of partition cylinders 32 are provided corresponding to each of the plurality of cooling cylinders 31. The upper end of each partition cylinder 32 is connected to the lower end of the corresponding cooling cylinder 31. The plurality of filaments f spun from the spinneret 13 travel through the yarn traveling space 31a formed by the cooling cylinders 31, and then travel downward below the storage box 20 (lower box body 20b) through the inner space of the partition cylinders 32.
[0035] As described above, the inner space of the main box body 20a is divided into one central space 51 and two side spaces 52, 53. The central space 51 is a space between the first yarn traveling space row 41 and the second yarn traveling space row 42. The side space 52 is a space located on the opposite side of the central space 51 across the first yarn traveling space row 41 in the front-to-rear direction. As shown in FIG. 2, the side space 52 is a space located in front of the central space 51. The central space 51 and the side spaces 52 are located on both sides of each yarn traveling space 31a belonging to the first yarn traveling space row 41 in the front-to-rear direction. The side space 53 is a space located on the opposite side of the central space 51 across the second yarn traveling space row 42 in the front-to-rear direction. As shown in FIG. 2, the side space 53 is a space located behind the central space 51. The central space 51 and the side spaces 53 are located on both sides of each yarn traveling space 31a belonging to the second yarn traveling space row 42 in the front-rear direction. The central space 51 corresponds to the "first space" in the present invention. The side spaces 52 and 53 correspond to the "second space" in the present invention. The front-rear direction corresponds to the "predetermined direction" in the present invention.
[0036] The central space 51 and the side space 52 are separated by a second partition wall 22. The central space 51 and the side space 53 are separated by a third partition wall 23. The second partition wall 22 and the third partition wall 23 correspond to the "wall" in the present invention. In this embodiment, the second partition wall 22 and the third partition wall 23 each have a surface that is perpendicular to the front-rear direction.
[0037] 2, a plurality of second partition walls 22 are provided so as to be arranged alternately in the left-right direction with the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41. The second partition walls 22 are arranged on both sides of each yarn traveling space 31a (cooling cylinder 31) belonging to the first yarn traveling space row 41 in the left-right direction, and are connected to the cooling cylinder 31.
[0038] More specifically, the second partition wall 22 is disposed between two adjacent yarn traveling spaces 31a in the left-right direction among the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41. The second partition wall 22 disposed between the two yarn traveling spaces 31a has both left-right ends connected to the two cooling cylinders 31 that define the two yarn traveling spaces 31a. The second partition wall 22 is also disposed between each of the plurality of yarn traveling spaces 31a located at both left-right ends among the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 and the side wall of the main box body 20a. The second partition wall 22 disposed between the yarn traveling space 31a and the side wall of the main box body 20a has both left-right ends connected to the cooling cylinders 31 that define the yarn traveling spaces 31a and the side wall of the main box body 20a. 3, the second partition wall 22 extends over the entire length of the main box body 20a in the vertical direction and is connected to the upper and lower walls of the main box body 20a. That is, the second partition wall 22 separates the entire space between two yarn traveling spaces 31a adjacent to each other in the horizontal direction.
[0039] In this embodiment, the entire boundary between the central space 51 and the side spaces 52 adjacent to each other in the front-rear direction is separated by the second partition wall 22. The "adjacent portions (of the central space 51 and the side spaces 52) in the front-rear direction" refers to the portions excluding the portions where the central space 51 and the side spaces 52 are arranged side by side in the front-rear direction, sandwiching the yarn traveling spaces 31a belonging to the first yarn traveling space row 41. In other words, the second partition wall 22 separates the entire inner space of the main box body 20a in the front-rear direction, excluding the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41.
[0040] 2, a plurality of third partition walls 23 are provided so as to be arranged alternately in the left-right direction with the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42. The third partition walls 23 are arranged on both sides of each yarn traveling space 31a (cooling cylinder 31) belonging to the second yarn traveling space row 42 in the left-right direction, and are connected to the cooling cylinder 31.
[0041] More specifically, the third partition wall 23 is disposed between two adjacent yarn traveling spaces 31a in the left-right direction among the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42. The third partition wall 23 disposed between the two yarn traveling spaces 31a has both left-right ends connected to the two cooling cylinders 31 that define the two yarn traveling spaces 31a. The third partition wall 23 is also disposed between each of the yarn traveling spaces 31a located at both left-right ends among the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42 and the side wall of the main box body 20a. The third partition wall 23 disposed between the yarn traveling spaces 31a and the side wall of the main box body 20a has both left-right ends connected to the cooling cylinders 31 that define the yarn traveling spaces 31a and the side wall of the main box body 20a. 3, the third partition wall 23 extends over the entire length of the main box body 20a in the vertical direction and is connected to the upper and lower walls of the main box body 20a. That is, the third partition wall 23 separates the entire space between two yarn traveling spaces 31a adjacent to each other in the horizontal direction.
[0042] In this embodiment, the entire boundary between the central space 51 and the side spaces 53 adjacent to each other in the front-rear direction is separated by the third partition wall 23. The "adjacent portions (of the central space 51 and the side spaces 53) in the front-rear direction" refers to the portions excluding the portions where the central space 51 and the side spaces 53 are arranged side by side in the front-rear direction, sandwiching the yarn traveling spaces 31a belonging to the second yarn traveling space row 42. In other words, the third partition wall 23 separates the entire inner space of the main box body 20a in the front-rear direction, excluding the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42.
[0043] As shown in FIG. 1 , an opening 24 facing the side space 52 is formed at the upper end of the front side wall of the main box body 20a. As shown in FIG. 2 , the opening 24 extends across the entire length of the main box body 20a in the left-right direction. The opening 24 corresponds to the "second flow section" of the present invention. The opening 24 may be covered with a material that allows gas to flow, such as a material with a flow straightening function. In addition, a connection section 24a is formed on the front side wall of the main box body 20a, extending forward from the edge of the opening 24. A duct 61a is connected to the front end of the connection section 24a.
[0044] As shown in FIG. 1 , an opening 25 facing the side space 53 is formed in the upper end of the rear side wall of the main box body 20a. As shown in FIG. 2 , the opening 25 extends across the entire length of the main box body 20a in the left-right direction. The opening 25 corresponds to the "second flow section" of the present invention. The opening 25 may be covered with a material that allows gas to flow, such as a material with a flow straightening function. In addition, a connection section 25a extending rearward from the edge of the opening 25 is formed in the rear side wall of the main box body 20a. A duct 61b is connected to the rear end of the connection section 25a.
[0045] 1, a connection part 26 is formed at the rear end of the lower box body 20b. A duct 63 is connected to the rear end of the connection part 26.
[0046] The airflow generating section 70 is for generating an airflow in the internal space of the main box body 20a. The airflow generating section 70 includes ducts 61a, 61b, 62, and 63, and fans 66 and 67.
[0047] The fan 66 is connected to the duct 62. The duct 62 connects the fan 66 to the ducts 61a and 61b. The end of the duct 61a, which is connected to the connection portion 24a and is opposite to the connection portion 24a side, and the end of the duct 61b, which is connected to the connection portion 25a and is opposite to the connection portion 25a side, are connected to the duct 62.
[0048] That is, the duct 61a and the duct 62 connect the fan 66 and the side space 52 via the connection portion 24a. The duct 61b and the duct 62 connect the fan 66 and the side space 53 via the connection portion 25a.
[0049] The fan 67 is connected to the duct 63. Here, the inner space of the lower box body 20b is connected to the central space 51 via the flow section 21b. In other words, the duct 63 connects the fan 67 and the central space 51 via the lower box body 20b.
[0050] 4 and 5 , an example of performing cooling by the cross-flow method in the yarn cooling device 3 will be described. In this embodiment, the fan 66 functions as an "exhaust means" that exhausts air from the side spaces 52 and 53, and the fan 67 functions as an "air supply means" that sends air into the central space 51. As a result, the airflow generating unit 70 generates an airflow that flows into the main box body 20a through the circulating portion 21b and is exhausted from the main box body 20a through the openings 24 and 25.
[0051] As shown in FIG. 4, when the fan 67 serving as the air supply means is driven, air sent out from the fan 67 is sent into the interior space of the lower box body 20b via the duct 63 (see FIG. 1). In other words, the duct 63 functions as an air supply pipe. The air sent into the interior space of the lower box body 20b passes through the circulating portion 21b, is rectified upward, and flows into the interior of the main box body 20a (more specifically, the central space 51). In other words, an air current is generated that flows into the interior of the main box body 20a via the circulating portion 21b. At this time, the central space 51 is in an air supply state.
[0052] Furthermore, when the fan 66 serving as exhaust means is driven, the fan 66 exhausts air from the interior of the main box body 20a (more specifically, from the side space 52) through the opening 24. The ducts 61a and 62 (see FIG. 1) function as exhaust pipes. The fan 66 also exhausts air from the interior of the main box body 20a (more specifically, from the side space 53) through the opening 25. The ducts 61b and 62 (see FIG. 1) function as exhaust pipes. At this time, the side spaces 52 and 53 are in an exhaust state.
[0053] As described above, when the central space 51 is in an air supply state and the side spaces 52, 53 are in an air exhaust state, an airflow is generated from the central space 51 toward the side spaces 52, 53. The air flowing from the central space 51 toward the side spaces 52, 53 is rectified as it passes through the peripheral wall of the cooling cylinder 31 and flows into the yarn traveling space 31a. In this way, the air passes across the yarn traveling space 31a in the front-to-rear direction, achieving cross-flow cooling. At this time, the multiple filaments f traveling in the yarn traveling space 31a are cooled and solidified by the cooling air.
[0054] 5 , a portion of the airflow flowing from the central space 51 toward the side space 52 is guided by the second partition wall 22 to the yarn traveling space 31a. More specifically, the airflow flowing between two adjacent yarn traveling spaces 31a in the left-right direction among the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 is guided to the two yarn traveling spaces 31a by the second partition wall 22. Similarly, the airflow flowing between each of the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 located at both ends in the left-right direction and the side wall of the main box body 20a is guided to the corresponding yarn traveling space 31a by the second partition wall 22. The airflow flowing toward the yarn traveling space 31a passes through the peripheral wall of the cooling cylinder 31 and flows into the yarn traveling space 31a. In this way, all of the air currents flowing toward the side spaces 52 in the central space 51 pass through the yarn traveling spaces 31 a belonging to the first yarn traveling space row 41 and flow into the side spaces 52 .
[0055] Furthermore, a portion of the airflow flowing from the central space 51 toward the side space 53 is guided to the yarn traveling space 31a by the third partition wall 23. More specifically, the airflow flowing between two adjacent yarn traveling spaces 31a in the left-right direction among the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42 is guided to the two yarn traveling spaces 31a by the third partition wall 23. Similarly, the airflow flowing between each of the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42 located at both ends in the left-right direction and the side wall of the main box body 20a is guided to the corresponding yarn traveling space 31a by the third partition wall 23. The airflow flowing toward the yarn traveling space 31a passes through the peripheral wall of the cooling cylinder 31 and flows into the yarn traveling space 31a. In this way, all of the air currents flowing toward the side spaces 53 in the central space 51 flow into the side spaces 53 through the plurality of yarn traveling spaces 31 a belonging to the second yarn traveling space row 42 .
[0056] (Features of the embodiment) As described above, the yarn cooling device 3 of the present embodiment cools the yarn Y (plurality of filaments f) spun downward from the spinneret 13 of the spinning beam 2. The yarn cooling device 3 includes a hollow main box body 20a arranged below the spinning beam 2. In the inner space of the main box body 20a, a space through which the plurality of filaments f spun from the spinneret 13 travels is defined as a yarn traveling space 31a, and spaces located on both sides of the yarn traveling space 31a in the front-rear direction are defined as a central space 51 and a side space 52 (side space 53). The main box body 20a is formed with a flow section 21b facing the central space 51 and through which gas can flow, and an opening 24 (opening 25) facing the side space 52 (side space 53) and through which gas can flow. A plurality of yarn traveling spaces 31a are arranged side by side in the left-right direction. Furthermore, the yarn cooling device 3 is disposed between two yarn traveling spaces 31a adjacent to each other at least in the left-right direction, and includes a second partition wall 22 (third partition wall 23) that separates the central space 51 from the side space 52 (side space 53).
[0057] According to the above-described configuration, when air flows into the central space 51 through the circulating portion 21b and is discharged from the lateral space 52 (53) through the opening 24 (opening 25), an airflow is generated from the central space 51 toward the lateral space 52 (53). Furthermore, when air flows into the lateral space 52 (53) through the opening 24 (opening 25) and is discharged from the central space 51 through the circulating portion 21b, an airflow is generated from the lateral space 52 (53) toward the central space 51. Of the airflows from the central space 51 toward the lateral space 52 (53) or the airflows from the lateral space 52 (53) toward the central space 51, at least the airflows directed between two adjacent yarn traveling spaces 31a in the left-right direction are guided to the yarn traveling space 31a by the second partition wall 22 (third partition wall 23). Therefore, the amount of air passing through the yarn traveling space 31a can be increased compared to when the second partition wall 22 (third partition wall 23) is not provided, and the yarn Y can be cooled efficiently.
[0058] Furthermore, in the yarn cooling device 3 of the present embodiment, the second partition wall 22 (third partition wall 23) separates the entire space between two horizontally adjacent yarn traveling spaces 31a. According to this configuration, the two horizontally adjacent yarn traveling spaces 31a are separated without any gaps by the second partition wall 22 (third partition wall 23). Therefore, the airflow flowing from the central space 51 or the side space 52 (side space 53) toward the space between the two horizontally adjacent yarn traveling spaces 31a is reliably guided to the yarn traveling space 31a by the second partition wall 22 (third partition wall 23). This allows the yarn Y to be cooled more efficiently.
[0059] Furthermore, the yarn cooling device 3 of this embodiment is formed with a first yarn traveling space row 41 consisting of a plurality of yarn traveling spaces 31a lined up in the left-right direction, and a second yarn traveling space row 42 consisting of a plurality of yarn traveling spaces 31a lined up in the left-right direction at a position different from the first yarn traveling space row 41 in the front-rear direction. The space between the first yarn traveling space row 41 and the second yarn traveling space row 42 is a central space 51, the spaces located on the opposite side of the central space 51 across the first yarn traveling space row 41 in the front-rear direction are side spaces 52, and the spaces located on the opposite side of the central space 51 across the second yarn traveling space row 42 in the front-rear direction are side spaces 53. With this configuration, the central space 51 is a space shared by the yarn traveling spaces 31a of the first yarn traveling space row 41 and the yarn traveling spaces 31a of the second yarn traveling space row 42. This enables the device to be made more compact.
[0060] Furthermore, in the yarn cooling device 3 of the present embodiment, the positions in the left-right direction of the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 and the positions in the left-right direction of the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42 are different. With this configuration, the device can be made smaller in the front-rear direction than when the positions in the left-right direction of the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 and the positions in the left-right direction of the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42 are the same.
[0061] Additionally, the yarn cooling device 3 of the present embodiment includes a plurality of cooling cylinders 31 that define the respective yarn traveling spaces 31a and allow gas to flow horizontally. The second partition walls 22 (third partition walls 23) are disposed on both sides of each cooling cylinder 31 in the left-right direction and are connected to each cooling cylinder 31. With this configuration, the cooling cylinders 31 can prevent significant deviation of the traveling trajectory of the filaments f when an airflow is blown onto the filaments f traveling in the yarn traveling space 31a. Furthermore, the airflow flowing from the central space 51 or the side space 52 (side space 53) between two adjacent yarn traveling spaces 31a in the left-right direction is reliably guided to the yarn traveling space 31a in the cooling cylinder 31 by the second partition wall 22 (third partition wall 23) connected to the cooling cylinder 31. This allows the yarn Y to be cooled more efficiently.
[0062] Furthermore, the yarn cooling device 3 of this embodiment includes an airflow generating section 70 capable of generating an airflow that flows into the inside of the main box body 20a through the circulating section 21b and is discharged from the inside of the main box body 20a through the openings 24 and 25.
[0063] According to the above-described configuration, air passes horizontally across the yarn traveling space 31a from the central space 51 toward the side spaces 52 and 53, thereby realizing cooling in the cross-flow direction.
[0064] Furthermore, when air flows from the two side spaces 52, 53 toward the central space 51, the air flows sent from the two side spaces 52, 53 collide with each other in the central space 51. This makes the air flow more likely to be turbulent in the central space 51, and the air flow from the yarn traveling space 31a to the central space 51 is more likely to be stagnant. In the above-described configuration, the air flow flows from the central space 51 toward the two side spaces 52, 53, so the air flow from the yarn traveling space 31a to the side spaces 52, 53 is less likely to be stagnant, further improving cooling capacity.
[0065] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configurations should not be considered to be limited to these embodiments. The scope of the present invention is defined by the claims, not by the description of the above embodiments, and further includes all modifications within the meaning and scope of the claims.
[0066] In the above embodiment, a case has been described in which cooling by the cross-flow method is performed by using the airflow generating unit 70 to generate an airflow that flows into the interior of the main box body 20a through the circulating portion 21b and is discharged from the interior of the main box body 20a through the openings 24 and 25. However, this is not limiting. That is, as shown in Figures 6 and 7, cooling by the cross-flow method can also be performed by using the airflow generating unit 70 to generate an airflow that flows into the interior of the main box body 20a through the openings 24 and 25 and is discharged from the interior of the main box body 20a through the circulating portion 21b.
[0067] In this case, the fan 66 (see FIG. 1) functions as the "air supply means." The ducts 61a, 61b, and 62 (see FIG. 1) function as the "air supply pipes." This generates an air flow that flows into the inside of the main box body 20a (more specifically, the side spaces 52 and 53) through the openings 24 and 25. The side spaces 52 and 53 are then in an air supply state.
[0068] Furthermore, the fan 67 (see FIG. 1) functions as an "exhaust means." The duct 63 (see FIG. 1) functions as an "exhaust pipe." This generates an airflow that is exhausted from the inside of the main box body 20a (more specifically, the central space 51) through the flow section 21b. This puts the central space 51 into an exhaust state.
[0069] 6 and 7, airflows are generated from the side spaces 52, 53 toward the central space 51. The airflow from the side spaces 52 toward the central space 51 is guided to the yarn traveling space 31a by the second partition wall 22. On the other hand, the airflow in the side spaces 53 toward the central space 51 is guided to the yarn traveling space 31a by the third partition wall 23.
[0070] The yarn cooling device 3 may also perform cooling using a loop cooling method. For example, cooling using the loop cooling method can be performed by causing both the fan 66 and the fan 67 to function as "air supply means." In this case, as shown in FIG. 8 , the airflow generating unit 70 generates an airflow that flows into the interior of the main box body 20a (more specifically, the central space 51) through the circulating portion 21b and into the interior of the main box body 20a (more specifically, the side spaces 52 and 53) through the openings 24 and 25. The ducts 61a, 61b, 62, and 63 (see FIG. 1 ) all function as "air supply pipes." As a result, the central space 51 and the side spaces 52 and 53 are in an air supply state.
[0071] As described above, the air supply state is established in the entire space around each cooling cylinder 31. At this time, air flows from around the cooling cylinder 31 into the yarn traveling space 31a of the cooling cylinder 31, and the air flows from above to below in the yarn traveling space 31a inside the cooling cylinder 31. As a result, the multiple filaments f traveling in the yarn traveling space 31a inside the cooling cylinder 31 are cooled and solidified by the cooling air.
[0072] Alternatively, for example, cooling using the loop cooling method can be performed by having both the fan 66 and the fan 67 function as "exhaust means." In this case, as shown in FIG. 9 , the airflow generating unit 70 generates an airflow that is exhausted from the interior of the main box body 20a (more specifically, the central space 51) through the circulating portion 21b and from the interior of the main box body 20a (more specifically, the side spaces 52 and 53) through the openings 24 and 25. The ducts 61a, 61b, 62, and 63 (see FIG. 1 ) all function as "exhaust pipes." This exhausts the central space 51 and the side spaces 52 and 53. In other words, the entire space around each cooling cylinder 31 is exhausted, so that air flows from the yarn running space 31a in the cooling cylinder 31 to the periphery of the cooling cylinder 31 (the central space 51 and the side spaces 52 and 53).
[0073] At this time, the yarn traveling space 31a in the cooling cylinder 31 is connected to the inner space of the pack housing 11 of the spinning beam 2 located above it. Therefore, almost no air flows into the yarn traveling space 31a from the upper end of the cooling cylinder 31, and air flows into the yarn traveling space 31a from the lower end of the cooling cylinder 31. Therefore, air flows from bottom to top in the yarn traveling space 31a of each cooling cylinder 31. In this way, air flows from bottom to top in the yarn traveling space 31a of each cooling cylinder 31, generating an airflow toward the periphery of each cooling cylinder 31. Even with the same annular cooling system, if air flows from the periphery of the cooling cylinder 31 into the yarn traveling space 31a of the cooling cylinder 31 and air flows from top to bottom in the yarn traveling space 31a of the cooling cylinder 31, the airflow becomes an accompanying flow, resulting in low cooling capacity. With this configuration, cooling with an annular cooling system with high cooling capacity can be achieved.
[0074] Furthermore, in the above embodiment, the second partition wall 22 and the third partition wall 23 are described as separating the entire space between two adjacent yarn traveling spaces 31a in the left-right direction, but this is not limiting. The second partition wall 22 and the third partition wall 23 may be disposed at least partially between the two adjacent yarn traveling spaces 31a in the left-right direction.
[0075] 10(a), the second partition wall 22 and the third partition wall 23 arranged on both sides of the cooling cylinder 31 in the left-right direction do not have to be connected to the cooling cylinder 31. In this case, a gap through which air can circulate is formed between the yarn traveling space 31a and the second partition wall 22 (or the third partition wall 23) in the left-right direction.
[0076] 10(b), the second partition wall 22 and the third partition wall 23 do not have to be disposed between the cooling cylinder 31 and the side wall of the main box body 20a in the left-right direction. In other words, the second partition wall 22 (third partition wall 23) does not have to be disposed between each of the yarn traveling spaces 31a located at both ends in the left-right direction among the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 (second yarn traveling space row 42) and the side wall of the main box body 20a.
[0077] Furthermore, as shown in Figure 11 (a), the second partition wall 22 (third partition wall 23) has one end on the left-right side connected to the cooling cylinder 31, and the other end on the left-right side does not have to be connected to anything.
[0078] In addition, as shown in FIG. 11( b), the second partition wall 22 (third partition wall 23) may be disposed in only a portion of the main box body 20a in the vertical direction. In the example shown in FIG. 11( b), a gap through which air flows is formed between the upper wall of the main box body 20a and the second partition wall 22 (third partition wall 23) and between the lower wall of the main box body 20a and the second partition wall 22 (third partition wall 23). Only one of these two gaps may be formed. Alternatively, no gap may be formed between the upper wall of the main box body 20a and the second partition wall 22 (third partition wall 23) or between the lower wall of the main box body 20a and the second partition wall 22 (third partition wall 23), and a gap through which air flows may be formed in a vertically intermediate portion of the second partition wall 22 (third partition wall 23).
[0079] In the above embodiment, the second partition wall 22 separating the central space 51 from the side space 52 and the third partition wall 23 separating the central space 51 from the side space 53 are provided, but this is not limiting. Only one of the second partition wall 22 and the third partition wall 23 may be provided.
[0080] Furthermore, in the above-described embodiment, the fan 67 connected to the central space 51 by the duct 63 functions as an "air supply means," and the fan 66 connected to the lateral spaces 52 and 53 by the ducts 61a, 61b, and 62 functions as an "exhaust means," thereby causing the airflow generating unit 70 to generate an airflow from the central space 51 toward the lateral spaces 52 and 53, but this is not limited to this.
[0081] For example, by making the ducts 61a and 61b in a state in which they can communicate with the outside air, when the fan 67 is driven to bring the central space 51 into an air supply state, the air that flows from the central space 51 into the side spaces 52 and 53 is exhausted from the side spaces 52 and 53 via the ducts 61a and 61b. This puts the side spaces 52 and 53 into an air exhaust state. In such a case, the ducts 61a and 61b do not need to be connected to the fan 66.
[0082] Furthermore, for example, by making the duct 63 in a state in which it can communicate with the outside air, when the fan 66 is driven to exhaust air from the side spaces 52 and 53, the outside air taken in from the duct 63 flows into the central space 51 through the lower box body 20b. This puts the central space 51 in an air supply state. In such a case, the duct 63 does not need to be connected to the fan 67.
[0083] Furthermore, in the above embodiment, the "air supply means" and "exhaust means" are realized by the fans 66 and 67, but this is not limiting. The "air supply means" and "exhaust means" may be realized by a blower, a compressor, or the like instead of a fan. The "exhaust means" may be realized by an aspirator. The "air supply means" may be realized by a compressed air tank.
[0084] In the above embodiment, the yarn traveling space 31a is defined by the cooling cylinder 31, but this is not limitative. The yarn traveling space 31a does not have to be a space defined by a member.
[0085] Additionally, in the above-described embodiment, a first yarn traveling space row 41 and a second yarn traveling space row 42 are formed, each consisting of a plurality of yarn traveling spaces 31a lined up in the left-right direction, and the plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 and the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42 are positioned at different positions in the left-right direction. However, this is not limited to this. The plurality of yarn traveling spaces 31a belonging to the first yarn traveling space row 41 and the plurality of yarn traveling spaces 31a belonging to the second yarn traveling space row 42 may be positioned at the same position in the left-right direction. Furthermore, there may be only one row consisting of a plurality of yarn traveling spaces 31a lined up in the left-right direction.
[0086] Furthermore, in the above embodiment, the yarn Y is cooled by an air flow, but the yarn Y may be cooled using a gas other than air. That is, any gas other than air may be supplied to the main box body 20a to cool the yarn Y. The temperature of the gas used for cooling may be any temperature suitable for cooling. The "temperature suitable for cooling" is, for example, room temperature (approximately 25°C) or lower.
[0087] DESCRIPTION OF SYMBOLS 1 Melt spinning device 2 Spinning beam (spinning device) 3 Yarn cooling device 13 Spinneret (spinneret) 20a Main box (box) 21b Flow section (first flow section) 22 Second partition wall (wall) 23 Third partition wall (wall) 24, 25 Opening (second flow section) 31 Cooling cylinder (cylinder) 31a Yarn running space 41 First yarn running space row 42 Second yarn running space row 51 Central space (first space, second space) 52 Side space (first space, second space) 53 Side space (first space, second space) 70 Air flow generating section
Claims
1. A yarn cooling device for cooling yarn spun downward from the spinneret of a spinning machine, It comprises a hollow box-shaped body positioned below the aforementioned spinning apparatus, In the inner space of the box, the space through which the yarn spun from the nozzle travels is defined as the yarn travel space, and the spaces located on either side of the yarn travel space in a predetermined direction along the horizontal are defined as the first space and the second space, The box is provided with a first circulation section facing the first space through which gas can flow, and a second circulation section facing the second space through which gas can flow. The aforementioned thread running spaces are arranged in multiple parallel directions that are perpendicular to the predetermined direction and are aligned horizontally. A yarn cooling device that is positioned in part between at least two adjacent yarn running spaces in the orthogonal direction, and comprises a wall separating the first space and the second space.
2. The yarn cooling device according to claim 1, wherein the wall partitions the entire space between the two adjacent yarn running spaces.
3. A first row of yarn running spaces, consisting of a plurality of yarn running spaces arranged in the orthogonal direction, and a second row of yarn running spaces, consisting of a plurality of yarn running spaces arranged in the orthogonal direction, are formed at a position different from the first row of yarn running spaces in the predetermined direction. The yarn cooling device according to claim 2, wherein the space between the first yarn running space row and the second yarn running space row is defined as the first space, and the second space is defined as the space located on the opposite side of the first space with respect to the first yarn running space row in the predetermined direction, and the space located on the opposite side of the first space with respect to the second yarn running space row in the predetermined direction.
4. The yarn cooling device according to claim 3, wherein the plurality of yarn running spaces belonging to the first yarn running space row and the plurality of yarn running spaces belonging to the second yarn running space row are located in different positions in the orthogonal direction.
5. Each of the aforementioned thread travel spaces is defined and comprises a plurality of cylindrical bodies configured to allow gas to pass through in the horizontal direction. The yarn cooling device according to claim 2, wherein the walls are arranged on both sides of each of the cylindrical bodies in the orthogonal direction and are connected to each of the cylindrical bodies.
6. Each of the thread running spaces is defined and comprises a plurality of cylindrical bodies configured to allow gas to pass through in the horizontal direction, The yarn cooling device according to claim 3, wherein the walls are arranged on both sides of each of the cylindrical bodies in the orthogonal direction and are connected to each of the cylindrical bodies.
7. Each of the thread running spaces is defined and comprises a plurality of cylindrical bodies configured to allow gas to pass through in the horizontal direction, The yarn cooling device according to claim 4, wherein the walls are arranged on both sides of each of the cylindrical bodies in the orthogonal direction and are connected to each of the cylindrical bodies.
8. The yarn cooling device according to any one of claims 1 to 7, further comprising an airflow generating unit capable of generating an airflow that flows into the interior of the box via the first flow section and is discharged from the interior of the box via the second flow section.
9. The yarn cooling device according to any one of claims 1 to 7, further comprising an airflow generating unit capable of generating an airflow that flows into the interior of the box via the first flow section and into the interior of the box via the second flow section.