JP6364311B2 - Yarn cooling device - Google Patents

Description

  The present invention relates to a yarn cooling device for cooling a yarn that is spun from a spinning beam that spins molten material downward as a yarn from a plurality of caps.

  As a yarn cooling device for cooling a yarn spun from a spinning beam, there is one disclosed in Patent Document 1, for example. In this yarn cooling device, a plurality of cooling cylinders are accommodated in a cooling air supply box, and the cooling air is supplied to the yarn traveling space inside the cooling cylinder, whereby the yarn is cooled. Since one cooling air supply box is provided for a plurality of cooling cylinders, the number of ducts for supplying cooling air can be reduced. For this reason, it becomes possible to arrange | position a cooling cylinder with high density, and can improve the production efficiency of a thread | yarn.

JP 2011-252260 A

  However, as is clear from FIG. 4 of Patent Document 1, the flow of the cooling air around each cooling cylinder is greatly different depending on the cooling cylinder. For this reason, the flow rate of the cooling air supplied to the yarn traveling space may vary greatly between different cooling cylinders. Even when only one cooling cylinder is viewed, the flow of the cooling air around the cylinder is greatly different in the circumferential direction. For this reason, a vortex is likely to be generated in the cooling air around the cooling cylinder, and the flow rate of the cooling air supplied to one yarn traveling space may greatly vary in the circumferential direction. As a result, the conventional yarn cooling device has a problem that variations in the quality of the produced yarn are likely to occur due to uneven cooling.

  Therefore, an object of the present invention is to make the quality of the yarn uniform in a yarn cooling device provided with a plurality of cooling cylinders for cooling the yarn.

  In order to achieve the above object, the present invention provides a yarn cooling device for cooling a yarn spun from a spinning beam that is spun downward from a plurality of bases as a yarn from a plurality of caps. The first yarn traveling space is disposed below the plurality of bases and has a first yarn traveling space in which the yarn can travel, and the peripheral wall of the first yarn traveling space is the first yarn traveling space. A plurality of cooling cylinders configured to have a rectifying member for rectifying the cooling air flowing into the plurality of cooling cylinders and a second yarn connected to the lower ends of the plurality of cooling cylinders and communicating with the first yarn traveling space A plurality of partition cylinders having a strip traveling space inside and having a blocking member for blocking a flow of cooling air into the second yarn traveling space in a peripheral wall of the second yarn traveling space; Has a supply space for supplying cooling air from the outside. A cooling air supply box in which the plurality of partitioning tubes are disposed in the supply space, and the plurality of cooling tubes are disposed outside the supply space and each of the plurality of cooling tubes. A partition wall is provided that surrounds the periphery of the cooling cylinder and forms a circulation space through which cooling air flows between the cooling cylinder and an outer peripheral surface of the cooling cylinder, and the boundary between the supply space and the circulation space A rectifying plate that circulates cooling air from the supply space to the circulation space while rectifying the cooling air is provided.

  According to the present invention, from the supply space formed in the cooling air supply box, through the circulation space formed between the outer peripheral surface of each cooling cylinder and the partition wall, the yarn running space (first) in each cooling cylinder. The flow of cooling air to the yarn running space is established. At this time, since a baffle plate is provided at the boundary between the supply space and the distribution space, variation in the flow rate of the cooling air supplied from the supply space to each distribution space can be suppressed. Variation in the flow rate of the cooling air supplied from the space to each yarn traveling space can be suppressed. Further, since the circulation space is surrounded by the partition walls, the cooling air does not flow from the periphery of the circulation space into the circulation space, and it is possible to suppress the generation of the vortex of the cooling air in the circulation space. As a result, the flow rate of the cooling air flowing through the circulation space can be made substantially uniform in the circumferential direction. As a result, the flow rate of the cooling air supplied from the circulation space to the yarn traveling space can be made almost uniform in the circumferential direction. be able to. Therefore, unevenness in cooling can be suppressed by suppressing variations in the flow rate of the cooling air supplied to the yarn traveling space between different cooling cylinders and in the circumferential direction of one cooling cylinder. Can be made uniform in quality.

  In the present invention, it is preferable that the circulation space is plane-symmetric with respect to at least one plane including the central axis of the cooling cylinder.

  If the circulation space is plane-symmetric with respect to at least one plane including the central axis of the cooling cylinder, the flow of cooling air in the circulation space is also generally plane-symmetric, and the flow rate of cooling air flowing through the circulation space is more uniform in the circumferential direction. Can be. Accordingly, it is possible to further suppress variation in the flow rate of the cooling air supplied to the yarn traveling space in the circumferential direction of one cooling cylinder.

  Furthermore, it is preferable that the distribution space is plane-symmetric with respect to two planes that include the central axis of the cooling cylinder and are orthogonal to each other.

  If the circulation space is plane-symmetric with respect to two planes that include the central axis of the cooling cylinder and are orthogonal to each other, the flow of cooling air in the circulation space is also substantially plane-symmetric with respect to the two orthogonal planes, and the cooling air flowing through the circulation space The flow rate can be made even more uniform in the circumferential direction. Therefore, the variation in the flow rate of the cooling air supplied to the yarn traveling space can be more effectively suppressed in the circumferential direction of one cooling cylinder.

  Further, the partition wall is preferably a regular hexagon in plan view.

  By making the partition a regular hexagon in plan view, it is possible to achieve a well-balanced demand for ensuring that the circulation space is as wide as possible and for making the cooling air flow in the circulation space as uniform as possible in the circumferential direction. . This point will be described later in detail with reference to the drawings.

  The plurality of cooling cylinders are preferably arranged in a staggered manner in a plan view.

  By arranging the cooling cylinders in a staggered manner, the cooling cylinders can be arranged at high density, so that the production efficiency of the yarn can be improved.

  Further, it is preferable that the cooling air supply box is provided with a side wall that surrounds the plurality of cooling cylinders.

  By providing such a side wall, the cooling cylinder can be prevented from being exposed to the outside, and the cooling cylinder can be protected. Moreover, the intensity | strength of a cooling wind supply box can also be improved by providing a side wall.

  Preferably, the plurality of cooling cylinders are arranged along the arrangement direction, and cooling air is supplied to the supply space from a direction orthogonal to the arrangement direction.

  In this way, the cooling air supplied from the direction orthogonal to the arrangement direction can easily flow uniformly to the plurality of cooling cylinders arranged along the arrangement direction. The variation in the flow rate of the cooling air supplied to can be further suppressed. When a plurality of cooling cylinders are two-dimensionally arranged like a staggered arrangement, the direction in which the most cooling cylinders are arranged side by side is defined as the “arrangement direction”.

  According to the present invention, uneven cooling can be suppressed by suppressing variations in the flow rate of cooling air supplied to the yarn traveling space between different cooling cylinders and in the circumferential direction of one cooling cylinder. Therefore, the yarn quality can be made uniform.

It is a partial cross section figure of the melt spinning apparatus provided with the yarn cooling device concerning this invention. It is sectional drawing in II-II of FIG. It is sectional drawing in III-III of FIG. It is sectional drawing in IV-IV of FIG. It is sectional drawing in VV of FIG. It is a schematic diagram for comparing the shape of a partition.

  Hereinafter, an embodiment of a yarn cooling device according to the present invention will be described.

[Melt spinning equipment]
FIG. 1 is a partial cross-sectional view of a melt spinning apparatus including a yarn cooling device according to the present invention. As shown in FIG. 1, the melt spinning apparatus 1 includes a spinning beam 2, a yarn cooling device 3, an oil supply device 4, and the like. The spinning beam 2 includes a plurality of pack housings 11. Each pack housing 11 is provided with a spinning pack 12 in which a melted material that becomes the yarn Y, such as melted polyester, is stored. A base 13 is provided at the lower end portion of the spin pack 12, and the melted material stored in the spin pack 12 extends downward as a plurality of yarns Y from a plurality of through holes (not shown) formed in the base 13. It is spun on. Here, the plurality of caps 13 are arranged in a staggered manner in two rows along the left-right direction, as in a cooling cylinder 30 described later (see FIG. 2).

  The yarn cooling device 3 is arranged below the spinning beam 2 and cools the yarn Y spun down from the spinning beam 2 by cooling air supplied from the duct 5. The oil supply device 4 is disposed below the yarn cooling device 3 and applies an oil agent to the yarn Y cooled by the yarn cooling device 3. Then, the yarn Y to which the oil agent is applied by the oil supply device 4 is wound around the bobbin by a winding device (not shown) arranged below the oil supply device 4.

[Yarn cooling device]
The yarn cooling device 3 is a device that cools the yarn Y by the cooling air supplied from the duct 5. The cooling air supply box 20 includes a plurality of cooling tubes 30, a plurality of partition tubes 40, and the like. It has become.

(Cooling air supply box)
The cooling air supply box 20 is provided above the cooling air supply chamber 21 connected to the duct 5 at the rear end, and the cooling cylinder storage chamber in which a plurality of cooling cylinders 30 are accommodated. 22. The cooling air supply chamber 21 and the cooling cylinder housing chamber 22 both have a substantially rectangular parallelepiped shape, and the internal space of the cooling air supply chamber 21 becomes a supply space 23 to which cooling air is supplied from the duct 5. A plurality of partition tubes 40 are arranged in the supply space 23.

(Cooling cylinder)
The plurality of cooling cylinders 30 have a substantially cylindrical shape, and are disposed at positions facing the plurality of caps 13, respectively. The cooling cylinder 30 is provided so as to vertically penetrate the cooling cylinder housing chamber 22, and a first yarn traveling space 31 extending in the vertical direction is formed inside the cooling cylinder 30. The yarn Y spun from the base 13 travels downward in the first yarn traveling space 31.

  The peripheral wall of the first yarn traveling space 31, that is, the cylindrical portion of the cooling cylinder 30 includes a first rectifying member 32 and a second rectifying member 33 disposed inside the first rectifying member 32. Has been. The first rectifying member 32 is made of, for example, a punching metal and rectifies the cooling air so that the cooling air flows from the distribution space 52 described later into the first yarn traveling space 31 substantially horizontally. The second rectifying member 33 is composed of, for example, a multi-layered wire mesh and the like, and uniformizes the flow of cooling air flowing from the distribution space 52 described later into the first yarn traveling space 31. In addition, when the 1st rectification | straightening member 32 is a punching metal, the flow of the cooling air from a punching metal is punched favorably by making the thickness ratio (= plate thickness / hole diameter) into about 0.75-0.85. Rectification can be performed in a direction perpendicular to the surface.

(Partition tube)
The plurality of partition tubes 40 have a substantially cylindrical shape, and are connected to the lower ends of the plurality of cooling tubes 30, respectively. The partition tube 40 is provided so as to vertically penetrate the cooling air supply chamber 21, and a second yarn traveling space 41 extending in the vertical direction is formed inside the partition tube 40. The second yarn traveling space 41 communicates with the first yarn traveling space 31, and the yarn Y that has traveled through the first yarn traveling space 31 faces the second yarn traveling space 41 downward as it is. And run.

  The peripheral wall of the second yarn traveling space 41, that is, the cylindrical portion of the partition tube 40 is configured to have a blocking member 42. The blocking member 42 is made of a material that does not allow the cooling air to pass through, and blocks the flow of cooling air from the supply space 23 to the second yarn traveling space 41.

(Partition wall)
A partition wall 51 surrounding the periphery of the cooling cylinder 30 is provided for each of the plurality of cooling cylinders 30. The partition wall 51 is made of a material that does not allow the cooling air to pass through, and an annular circulation space 52 is formed between the outer peripheral surface of the cooling cylinder 30 and the partition wall 51. The cooling air supplied from the duct 5 to the supply space 23 is rectified by a rectifying plate 53 described later and flows into each distribution space 52. The cooling air rectified by the rectifying plate 53 mainly flows upward in the circulation space 52, passes through the first rectifying member 32 and the second rectifying member 33, and is supplied to the first yarn traveling space 31. .

(rectifier)
A rectifying plate 53 is provided at the boundary between the supply space 23 inside the cooling air supply chamber 21 and each circulation space 52. The rectifying plate 53 is made of, for example, a punching metal or a honeycomb material, and performs rectification so that the cooling air flows from the supply space 23 into the circulation space 52 generally upward. Note that, in the boundary portion between the cooling air supply chamber 21 and the cooling tube housing chamber 22, that is, the portion where the rectifying plate 53 is not provided in the bottom surface portion of the cooling tube housing chamber 22 (or the upper surface portion of the cooling air supply chamber 21). Is made of a material that does not allow cooling air to pass through. In addition, when the baffle plate 53 is a punching metal, the ratio of these thicknesses (= plate thickness / hole diameter) is set to about 0.75 to 0.85, so that the flow of cooling air from the punching metal can be satisfactorily punched surface. Can be rectified in a direction perpendicular to.

(Planar arrangement of cooling cylinder and bulkhead)
2 is a cross-sectional view taken along the line II-II in FIG. As shown in FIG. 2, the plurality of cooling cylinders 30 are staggered in two rows along the left-right direction. More specifically, when the distance between the center C of one cooling cylinder 30 and the center C of the cooling cylinder 30 adjacent thereto is D, they are staggered so that all the distances D are equal. In other words, a triangle formed by connecting the center C of one cooling cylinder 30, the center C of the cooling cylinder 30 adjacent to the center C, and the center C of the cooling cylinder 30 adjacent to both of them becomes an equilateral triangle. In addition, the plurality of cooling cylinders 30 are arranged in a staggered manner. Thus, by arranging the plurality of cooling cylinders 30 (and the plurality of caps 13) in a staggered manner, the cooling cylinders 30 can be arranged with high density, and the production efficiency of the yarn Y can be improved.

  Further, in the present embodiment, the partition walls 51 are regular hexagons in plan view, and the partition walls 51 are arranged in a honeycomb shape. The plurality of cooling cylinders 30 are respectively arranged in the center of the regular hexagonal partition wall 51, and the shape of the circulation space 52 formed between the outer peripheral surface of the cooling cylinder 30 and the partition wall 51 is the same. . Further, by making the partition wall 51 into a regular hexagon, the circulation space 52 is plane-symmetric with respect to six planes including the central axis of the cooling cylinder 30. The six planes P exist at intervals of 30 degrees in the circumferential direction. For this reason, the distribution space 52 of the present embodiment is not only plane-symmetric with respect to at least one plane P including the central axis of the cooling cylinder 30, but also includes two planes P including the central axis of the cooling cylinder 30 and orthogonal to each other. Is also plane symmetric.

(Cooling air flow)
3 is a cross-sectional view taken along line III-III in FIG. 2, FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a cross-sectional view taken along line V-V in FIG. The arrows shown in FIGS. 3 to 5 indicate the flow of cooling air. In addition, although the supply space 23 and each distribution space 52 are actually one space, these are divided and shown in FIG. Therefore, in order to make the explanation easy to understand, even if there is actually one space, the divided space in FIG.

  First, the cooling air supplied from the duct 5 flows into the supply space 23 of the cooling air supply chamber 21. At this time, the cooling air is supplied to the supply space 23 from a direction (front-rear direction) orthogonal to the arrangement direction (left-right direction) in which the plurality of cooling cylinders 30 are arranged. Note that, when the plurality of cooling cylinders 30 are two-dimensionally arranged as in the present embodiment, the direction in which the most cooling cylinders 30 are arranged side by side is defined as an “arrangement direction”.

  As shown in FIG. 4, since the some partition cylinder 40 is arrange | positioned in the supply space 23, a cooling wind flows as it sews between these. The flow of the cooling air around each partition tube 40 varies depending on the partition tube 40, but there is no particular problem because the cooling air does not flow from the supply space 23 into the second yarn traveling space 41 inside the partition tube 40. .

  As shown in FIG. 3, the cooling air flowing through the supply space 23 then flows into each distribution space 52. Here, a rectifying plate 53 is provided between the supply space 23 and each distribution space 52. For this reason, the cooling air flowing from the supply space 23 into each circulation space 52 is rectified by the rectifying plate 53, and variation in flow rate and wind direction is suppressed. Moreover, since all the circulation spaces 52 have the same shape, it is possible to further suppress variation in the flow rate of the cooling air flowing into each circulation space 52.

  As shown in FIGS. 3 and 5, the cooling air rectified by the rectifying plate 53 flows into the first yarn traveling space 31 from the entire circumference of the cooling cylinder 30 while flowing mainly upward in the circulation space 52. . At this time, as the cooling air passes through the first rectifying member 32 and the second rectifying member 33, the cooling air in which variations in flow rate and wind direction in the circumferential direction are suppressed is supplied to the first yarn traveling space 31. It will be. Thus, the yarn Y traveling in the first yarn traveling space 31 is cooled by the cooling air supplied to the first yarn traveling space 31.

[effect]
According to the yarn cooling device 3 according to the present embodiment, since the rectifying plate 53 is provided at the boundary between the supply space 23 and the distribution space 52, the cooling supplied from the supply space 23 to each distribution space 52. Variations in the flow rate of the wind can be suppressed, and as a result, variations in the flow rate of the cooling air supplied from the distribution spaces 52 to the first yarn traveling spaces 31 can be suppressed. In addition, since the circulation space 52 is surrounded by the partition walls 51, the cooling air does not flow into the circulation space 52 from the periphery of the circulation space 52, and it is possible to suppress the generation of the cooling air vortex in the circulation space 52. As a result, the flow rate of the cooling air flowing through the circulation space 52 can be made substantially uniform in the circumferential direction. As a result, the flow rate of the cooling air supplied from the circulation space 52 to the first yarn traveling space 31 is changed to the circumferential direction. Can be made substantially uniform. Therefore, it is possible to suppress uneven cooling by suppressing variations in the flow rate of the cooling air supplied to the first yarn traveling space 31 between different cooling cylinders 30 and in the circumferential direction of one cooling cylinder 30. As a result, the quality of the yarn Y can be made uniform.

  In the present embodiment, the circulation space 52 is plane-symmetric with respect to at least one plane P including the central axis of the cooling cylinder 30. As described above, if the circulation space 52 is plane-symmetric with respect to at least one plane P including the central axis of the cooling cylinder 30, the flow of the cooling air in the circulation space 52 is also substantially plane-symmetric and the cooling air flowing through the circulation space 52. Can be made more uniform in the circumferential direction. Therefore, the variation in the flow rate of the cooling air supplied to the first yarn traveling space 31 in the circumferential direction of one cooling cylinder 30 can be further suppressed.

  Further, in the present embodiment, the circulation space 52 is plane-symmetric with respect to two planes P including the central axis of the cooling cylinder 30 and orthogonal to each other. Thus, if the circulation space 52 is plane-symmetric with respect to two planes P including the central axis of the cooling cylinder 30 and orthogonal to each other, the flow of the cooling air in the circulation space 52 is also generally plane-symmetric with respect to the two orthogonal planes P. Thus, the flow rate of the cooling air flowing through the circulation space 52 can be made more uniform in the circumferential direction. Therefore, the variation in the flow rate of the cooling air supplied to the first yarn traveling space 31 in the circumferential direction of one cooling cylinder 30 can be further effectively suppressed.

  Further, in the present embodiment, the partition 51 is formed in a regular hexagonal shape in plan view, thereby requesting that the circulation space 52 be as wide as possible and requesting that the cooling air flow in the circulation space 52 be as uniform as possible in the circumferential direction. Can be balanced in a balanced manner. This point will be described below with reference to FIG. 6A and 6B are schematic diagrams for comparing the shapes of the partition walls. FIG. 6A shows a case where a rectangular partition wall 61 is provided in plan view, and FIG. 6B shows a case where a circular partition wall 71 is provided in plan view. is there.

  In general, in order to improve the cooling efficiency of the yarn Y, there is a demand to secure the flow space 52 as wide as possible and increase the flow rate of the cooling air. In order to widen the distribution space 52, for example, as shown in FIG. 6a, it is conceivable to adopt a rectangular partition wall 61 (shown by a thick line) in a plan view. By doing so, compared with the distribution space 52 of the present embodiment, the distribution space 62 can be widened by the amount indicated by the oblique lines in the figure. However, if so, the shape of the circulation space 62 becomes more non-uniform in the circumferential direction, and cooling air vortices are likely to be generated in the circulation space 62.

  On the other hand, in order to make the shape of the circulation space 52 more uniform in the circumferential direction, for example, as shown in FIG. 6b, it is conceivable to adopt a circular partition wall 71 (shown by a thick line) in plan view. However, in this case, compared with the distribution space 52 of the present embodiment, the distribution space 72 is narrowed by the amount indicated by the oblique lines in the figure. In particular, when the cooling cylinders 30 are arranged in a staggered manner as in the present embodiment, gaps indicated by diagonal lines are generated between the partition walls 71, and a useless space is generated.

  Therefore, as in the present embodiment, if the partition wall 51 is a regular hexagon in plan view, it is desired to secure the flow space 52 as wide as possible and to make the flow of cooling air in the flow space 52 as uniform as possible in the circumferential direction. Requests can be balanced in a balanced manner. In particular, when the cooling cylinders 30 are arranged in a staggered manner, there is an advantage that a useless gap can be avoided between the partition walls 51 and the distribution space 52 can be secured to the maximum.

  In the present embodiment, the cooling air supply box 20 is provided with a side wall (a side wall of the cooling cylinder housing chamber 22) surrounding the plurality of cooling cylinders 30. For this reason, the cooling cylinder 30 can be prevented from being exposed to the outside, and the cooling cylinder 30 can be protected. Moreover, the intensity | strength of the cooling air supply box 20 can also be improved by providing a side wall.

  In the present embodiment, a plurality of cooling cylinders 30 are arranged along the arrangement direction (left-right direction), and cooling air is supplied to the supply space 23 from a direction orthogonal to the arrangement direction. For this reason, since the cooling air supplied from the direction orthogonal to the arrangement direction easily flows to the plurality of cooling cylinders 30 arranged along the arrangement direction, the first yarn of each cooling cylinder 30 is provided. Variations in the flow rate of the cooling air supplied to the traveling space 31 can be further suppressed.

[Other Embodiments]
The present invention is not limited to the above embodiment, and the elements of the above embodiment can be appropriately combined or variously modified without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the plurality of cooling cylinders 30 are staggered in two rows in the left-right direction, but the arrangement of the cooling cylinders 30 is not limited to this. For example, the plurality of cooling cylinders 30 may be arranged in one row in the left-right direction, and even when the cooling cylinders 30 are arranged over a plurality of rows, it is not essential to arrange them in a staggered manner.

  Moreover, in the said embodiment, the partition 51 was made into the regular hexagon by planar view, and it demonstrated that this was the most suitable. However, this does not deny that the partition 51 has a shape other than a regular hexagon. For example, even when the rectangular or circular partition walls 61 and 71 shown in FIG. 6 are adopted, the quality of the yarn Y is higher than that of the prior art in that a separate distribution space 52 is provided for the cooling cylinder 30. Needless to say, can be made more uniform. For example, if the partition wall 51 is a regular polygon or circle other than an equilateral triangle in a plan view and the cooling cylinder 30 is arranged at the center thereof, the distribution space 52 includes two central axes including the central axis of the cooling cylinder 30 and orthogonal to each other. It can be plane-symmetric with respect to the plane.

  Further, in the above embodiment, the cooling cylinder housing chamber 22 is provided in the cooling air supply box 20, and the plurality of cooling cylinders 30 are surrounded by the side wall of the cooling cylinder housing chamber 22. However, such a configuration is not essential, and the configuration may be such that the side wall is eliminated and the outer peripheral portion of the partition wall 51 is exposed to the outside.

  Moreover, in the said embodiment, although the cylinder part of the cooling cylinder 30 shall be comprised with the 1st rectification member 32 and the 2nd rectification member 33, it is also possible to abbreviate | omit the 2nd rectification member 33. . In this case, the distance between the outermost peripheral portion of the yarn Y traveling in the first yarn traveling space 31 and the first rectifying member 32 is about 12 to 15 times the hole diameter of the punching metal constituting the first rectifying member 32. By doing so, uniform cooling air can be suitably supplied to the yarn Y without the second rectifying member 33.

2: Spinning beam 3: Yarn cooling device 13: Base 20: Cooling air supply box 23: Supply space 30: Cooling cylinder 31: First yarn traveling space 32: First straightening member (rectifying member)
33: Second rectifying member (rectifying member)
40: Partition cylinder 41: Second yarn traveling space 42: Blocking member 51: Partition wall 52: Distribution space 53: Current plate Y: Yarn

Claims (5)

A yarn cooling device that cools a yarn spun from a spinning beam that spins a melted material downward as a yarn from a plurality of bases,
The first yarn traveling space is disposed in the lower part of the spinning beam so as to face the plurality of bases and allows the yarn to travel therein. The peripheral wall of the first yarn traveling space is the first thread traveling space. A plurality of cooling cylinders configured to have a rectifying member that rectifies cooling air flowing into the yarn traveling space;
The second yarn traveling space is connected to the lower ends of the plurality of cooling tubes and communicates with the first yarn traveling space, and the peripheral wall of the second yarn traveling space is the second yarn. A plurality of partition tubes configured to include a blocking member that blocks the flow of cooling air into the traveling space;
A cooling air supply box having a supply space to which cooling air is supplied from the outside, wherein the plurality of partitioning tubes are disposed in the supply space;
With
The plurality of cooling cylinders are disposed outside the supply space, and surround the cooling cylinders with respect to each of the plurality of cooling cylinders, and cooling air flows between the cooling cylinders and the outer peripheral surface of the cooling cylinders. A partition wall is formed to form a distribution space,
A rectifying plate is provided at the boundary between the supply space and the circulation space to circulate cooling air from the supply space to the circulation space ,
The yarn cooling device, wherein the partition wall is a regular polygon other than a regular triangle in plan view . The yarn cooling device according to claim 1 , wherein the partition wall has a regular hexagonal shape in plan view. The yarn cooling device according to claim 1 or 2 , wherein the plurality of cooling cylinders are arranged in a staggered manner in a plan view. The yarn cooling device according to any one of claims 1 to 3 , wherein a side wall surrounding the plurality of cooling cylinders is provided in the cooling air supply box. The yarn according to any one of claims 1 to 4 , wherein the plurality of cooling cylinders are arranged in an arrangement direction, and cooling air is supplied to the supply space from a direction orthogonal to the arrangement direction. Cooling system.

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