Combined filament yarn manufacturing device

Abstract

To provide a combined filament yarn manufacturing device that can suppress filament sway of a second group yarn on a roller to which the yarn is guided, to reduce possible damage on the yarn.SOLUTION: A combined filament yarn manufacturing device comprises: heating rollers 31 to 35 to heat a first group yarn Y1 split by a fiber splitting guide 11; a yarn feeding roller 12 to lead the first group yarn Y1 into a heat insulation box 30 from an introduction port 30a; a yarn feeding roller 13 to guide the first group yarn Y1 derived from a deriving port 30b to the outside through the heating rollers 31 to 35 in the heat insulation box 30; guide rollers 36, 37 to guide a second group yarn Y2 split by the fiber splitting guide 11 to the yarn feeding roller 13 by avoiding the heating rollers 31 to 35; an interlace 16; a fiber mixing device 18; and a yarn combining guide 20 having a plurality of guide parts, which combine and guide the first group yarn Y1 and the second group yarn Y2 on upstream side in a yarn traveling direction of the yarn feeding roller 13 and the fiber mixing device 18, along an axial direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mixed yarn manufacturing apparatus that divides multiple yarns spun from a spinning machine into a first group of yarns and a second group of yarns, performs different processes on the yarns, and then mixes the first group of yarns with the second group of yarns to produce a mixed yarn. [Background technology]

[0002] For example, Patent Document 1 discloses a take-up device that takes up a plurality of yarns 10 spun from a spinning machine 2. For example, FIG. 2 of the same document discloses a yarn feed roller 16, five heating rollers 4 (4a to 4e), and a yarn feed roller 17 as rollers around which the plurality of yarns spun from the spinning machine 2 are wound. These rollers are arranged so that their axes are parallel to the front-rear direction. The five heating rollers 4 (4a to 4e) are housed in a heat-retaining box 26, and the five heating rollers 4 (4a to 4e) perform a drawing process and a heat set. A slit 26b is formed in the lower part of the right side of the heat-retaining box 26, and a slit 26c is formed in the upper end part of the right side of the heat-retaining box 26. The yarn feed roller 16 is provided immediately to the right of the slit 26b, and the yarn feed roller 17 is provided immediately to the right of the slit 26c. The plurality of yarns spun from the spinning machine 2 are arranged in the left-right direction, and are sent to the yarn feed roller 16 with the arrangement direction changed to the front-rear direction. The multiple yarns sent to the yarn feeding roller 16 enter the thermal insulation box 26 through the slit 26b, are sent to the heating rollers 4a to 4e, and are sent out through the slit 26c. The multiple yarns sent out through the slit 26c are sent to the yarn feeding roller 17. The multiple yarns sent to the yarn feeding roller 17 are further sent to the yarn feeding roller 11 on the downstream side.

[0003] In recent years, studies have been conducted on the production of a mixed yarn (BSY: BiShrinkage Yarn) by mixing a drawn yarn (FDY: Fully Drawn Yarn) that has been subjected to drawing treatment and heat setting with a partially oriented yarn (POY: Partially Oriented Yarn) that has not been subjected to drawing treatment or heat setting, using the configuration of a take-up device 100 disclosed in Patent Document 1. The drawn yarn and the partially oriented yarn have different shrinkage rates, and mixed yarns made by combining two types of yarn with different shrinkage rates are known to have a good texture. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-187324 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when producing a mixed yarn using the configuration of the take-up device 100 disclosed in Patent Document 1, the partially oriented yarn that has not been subjected to either drawing or heat setting has an unstable tension, and therefore may sway on the guided rollers. If the yarn sway occurs on the guided rollers, the friction between the yarn and the roller surface may damage the yarn.

[0006] The present invention has been made in consideration of the above-mentioned situation, and has an object to provide a mixed yarn production apparatus that produces a mixed yarn by mixing a first group of yarns that has been subjected to a drawing process and heat setting with a second group of yarns that has not been subjected to either a drawing process or heat setting, which is capable of suppressing yarn swaying of the second group of yarns on the guided rollers and reducing damage that may be inflicted on the yarns. [Means for solving the problem]

[0007] (1) In order to solve the above problems, the mixed yarn manufacturing apparatus 1 of the present invention is A mixed yarn manufacturing apparatus for manufacturing a mixed yarn by performing different processes on a first group of yarns and a second group of yarns among a plurality of yarns spun from a spinning machine, and then mixing the first group of yarns with the second group of yarns, A fiber splitting guide that splits the plurality of yarns into the first group of yarns and the second group of yarns; a first heating roller for heating the first group of yarns separated by the separating guide; a second heating roller disposed downstream of the first heating roller in a yarn running direction, stretching and heat-setting the first group of yarns between the first heating roller and the second heating roller; a heat retaining box that accommodates the first heating roller and the second heating roller and has a first opening formed in a lower part of a wall portion and a second opening formed in an upper part of the wall portion; A first yarn feed roller that feeds the first group of yarns separated by the separating guide through the first opening into the thermal insulation box; a second yarn feeding roller for guiding the first group of yarns that enter the thermal insulation box from the first opening, pass through the first heating roller and the second heating roller, and are then guided to the outside of the thermal insulation box from the second opening; a guide roller that guides the second group of yarns separated by the separating guide to the second yarn feed roller without passing through either the first heating roller or the second heating roller; a yarn doubling device disposed downstream of the second yarn feed roller in a yarn running direction, which doubling the first group of yarns and the second group of yarns; a yarn mixing device disposed upstream of the yarn doubling device in a yarn running direction, the yarn doubling device supplementarily doubling the first group of yarns and the second group of yarns; a yarn combination guide disposed downstream of both the second heating roller and the guide roller in a yarn running direction and upstream of both the fiber mixing device and the second yarn feeding roller in a yarn running direction, the yarn combination guide having a plurality of guide sections along an axial direction of the second yarn feeding roller for combining and guiding the first group of yarns that have been drawn and heat set and the second group of yarns that have not been drawn and heat set; The present invention is characterized by comprising:

[0008] According to the mixed yarn manufacturing apparatus described in (1) above, the first group of yarns that have been drawn and heat-set and the second group of yarns that have not been drawn and heat-set are combined and guided to the second yarn feed roller by a plurality of guide parts along the axial direction of the second yarn feed roller. The movement of the first group of yarns and the second group of yarns in the arrangement direction is restricted by the guide parts, so that the yarns of the first group and the second group of yarns are more likely to be combined with each other than on the second yarn feed roller. Therefore, the yarn sway of the second group of yarns on the second yarn feed roller can be suppressed by the yarn of the first group, and damage that may be caused to the yarn of the second group can be reduced.

[0009] The fiber mixing device may be disposed on the upstream side of the second yarn feeding roller in the yarn running direction, or on the downstream side of the second yarn feeding roller in the yarn running direction.

[0010] (2) In the mixed yarn manufacturing apparatus of the present invention, The guide roller is The lower angle of the two angles between the yarn path of the second group of yarns from the guide roller to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feed roller is 180±30° (upper and lower limits included). It is more preferable to do so.

[0011] According to the mixed yarn manufacturing apparatus described in (2) above, the lower angle between the yarn path of the second group of yarns from the guide roller to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feed roller is 180±30°, so that damage to the second group of yarns can be reduced. In detail, it is preferable that the yarn path of the second group of yarns from the guide roller to the second yarn feed roller is linear. However, if the yarn combination guide is disposed downstream of the guide roller in the yarn running direction and upstream of the second yarn feed roller in the yarn running direction, the yarns of the second group may be bent at the yarn combination guide, which may cause damage to the second group of yarns. In this regard, according to the mixed yarn manufacturing apparatus described in (2) above, even if the yarn combination guide is disposed downstream of the guide roller in the yarn running direction and upstream of the second yarn feed roller in the yarn running direction, damage to the second group of yarns can be reduced.

[0012] (3) In the mixed yarn manufacturing apparatus of the present invention, The fiber blending device is disposed upstream of the second yarn feeding roller in a yarn running direction, and is configured to supplementarily combine the combined first group of yarns and the second group of yarns, and to guide the supplementarily combined yarn to the second yarn feeding roller. It is more preferable to do so.

[0013] According to the mixed yarn manufacturing apparatus described in (3) above, since the mixed yarn device is disposed downstream in the yarn running direction of the yarn combination guide and upstream in the yarn running direction of the second yarn feed roller, the combined yarns of the first and second groups are supplementarily combined, and the thus supplementarily combined yarn is guided to the second yarn feed roller. Therefore, compared to the case where a yarn that is merely a combination of the yarns of the first and second groups and is not supplementarily combined is guided to the second yarn feed roller, it is possible to further suppress the yarn sway of the second group yarn Y2 on the second yarn feed roller.

[0014] (4) In the mixed yarn manufacturing apparatus of the present invention, The plurality of yarns spun from the spinning machine are arranged along a horizontal direction, and the fiber splitting guide is arranged along the horizontal direction, The second yarn feeding roller is arranged so that its axial direction is horizontal and perpendicular to the one direction, The guide roller is A first guide roller arranged so that its axial direction is parallel to the second yarn feed roller, and the second group of yarns separated by the fiber separating guide are guided while changing the arrangement direction; A second guide roller is disposed downstream of the first guide roller in the yarn running direction and above the first guide roller such that an axial direction of the second guide roller is parallel to that of the first guide roller. It is more preferable to do so.

[0015] According to the mixed yarn manufacturing apparatus described in (4) above, the separating guide is arranged along one horizontal direction, and the second yarn feed roller is arranged so that its axial direction is horizontal and perpendicular to the one direction. Therefore, the second group of yarns separated by the separating guide are guided to the first guide roller with their arrangement direction changed. However, by arranging the second guide roller above the first guide roller so that its axial direction is parallel to the first guide roller, damage to the second group of yarns can be suitably reduced even when the distance required to change the arrangement direction of the second group of yarns separated by the separating guide is secured.

[0016] In detail, if the distance required to change the arrangement direction of the second group of yarns separated by the separating guide is secured, the position of the first guide roller is lowered. In this case, even if the second guide roller is not arranged, by arranging a yarn combination guide along the yarn path of the second group of yarns between the first guide roller and the second yarn feed roller, it is possible to suppress bending of the second group of yarns and reduce damage that may be caused to the second group of yarns. However, in this case, it is necessary to bend the first group of yarns led out from the second opening with the yarn combination guide. Although the first group of yarns has been stretched and heat set, if the bending of the first group of yarns becomes large, it may cause damage to the first group of yarns, which is not preferable. In addition, if the bending of the first group of yarns becomes large, there is a risk that the first group of yarns may interfere with the insulation box when led out from the second opening. Therefore, by positioning the second guide roller downstream of the first guide roller in the yarn running direction and above the first guide roller, even when the distance required to change the arrangement direction of the second group of yarns separated by the fiber separating guide is secured, it is possible to reduce damage to the second group of yarns while preventing the bending of the first group of yarns from becoming too large.

[0017] (5) In the mixed yarn manufacturing apparatus of the present invention, The second guide roller, the second yarn feed roller, and the yarn combination guide are In the thermal insulation box, the upper angle of the two angles between the yarn path of the first group of yarns from the most downstream roller in the yarn running direction of the first group of yarns to the yarn combination guide and the yarn path from the combination guide to the second yarn feed roller is 180±30° (including upper and lower limits), The lower angle of the two angles between the yarn path of the second group of yarns from the second guide roller to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feed roller is 180±30° (including upper and lower limits). is more preferable.

[0018] According to the mixed yarn manufacturing device described in (5) above, even if the distance required to change the arrangement direction of the second group of yarns separated by the separating guide is secured, it is possible to suppress the yarn swing of the second group of yarns Y on the second yarn feed roller and reduce damage that may be caused to the first group of yarns and the second group of yarns before they are guided to the second yarn feed roller. In addition, it is possible to prevent the first group of yarns from interfering with the thermal insulation box.

[0019] (6) In the mixed yarn manufacturing apparatus of the present invention, The second guide roller is disposed so that the second group of yarns guided by the second yarn feed roller are lower than the first group of yarns guided by the second yarn feed roller. It is more preferable to do so.

[0020] According to the blended yarn manufacturing apparatus described in (6) above, by arranging the second group of yarns guided to the second yarn feed roller to be lower than the first group of yarns guided to the second yarn feed roller, the first group of yarns Y1 are positioned higher than the second group of yarns Y2, and yarn sway of the second group of yarns Y2 on the yarn feed roller 13 can be more reliably suppressed.

[0021] (7) In the mixed yarn manufacturing apparatus of the present invention, The first guide roller and the second guide roller are arranged in the vertical direction along the wall portion of the heat-retaining box. It is more preferable to do so.

[0022] According to the mixed yarn manufacturing apparatus described in (7) above, by arranging the first guide roller and the second guide roller in the vertical direction along the wall portion, it is possible to reduce damage to the second group of yarns while suppressing the increase in size of the mixed yarn manufacturing apparatus in one direction.

[0023] (8) In the mixed yarn manufacturing apparatus of the present invention, The first guide roller and the second guide roller are disposed outside the heat-insulating box, The second group of yarns separated by the separating guide are guided to the second yarn feed roller without entering the heat-insulating box. It is more preferable to do so.

[0024] According to the mixed yarn manufacturing apparatus described in (8) above, the yarn threading operation can be performed by guiding the second group of yarns sent from the guide roller to the yarn feed roller without introducing them into an insulating box, making the yarn threading operation easier. Effect of the Invention

[0025] According to the present invention, a mixed yarn production apparatus can be provided that produces a mixed yarn by mixing a first group of yarns that have been subjected to a drawing treatment and heat setting with a second group of yarns that have not been subjected to either a drawing treatment or heat setting, and that can reduce damage that may be inflicted on the yarns.

[0026] In addition, the mixed yarn manufacturing apparatus according to the present invention does not necessarily have all of the configurations described in (1) to (8) above. For example, in the invention related to the mixed yarn manufacturing apparatus described in (1) above, all of the configurations described in (2) to (8) above are not essential. In addition, the mixed yarn manufacturing apparatus according to the present invention can be any combination of the configuration described in (1) above and any of the configurations described in (2) to (8) above, as long as compatibility can be achieved. In addition, when the configuration described in (1) above and any of the configurations described in (2) to (8) above are arbitrarily combined, it is not essential to combine all of the configurations described in any of (2) to (8) above, and it is also possible to combine a part of the configurations described in any of (2) to (8) above, as long as compatibility can be achieved. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is a front view showing an example of a mixed yarn manufacturing apparatus according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view illustrating an example of a thread combination guide according to an embodiment of the present invention. [Diagram 3]FIG. 2 is a schematic diagram showing an example of a suitable arrangement pattern of a guide roller, a yarn combination guide, a yarn mixing device, and a yarn sending roller in the mixed yarn manufacturing apparatus according to the embodiment of the present invention. [Figure 4] FIG. 11 is a front view showing an example of a mixed yarn manufacturing apparatus according to a first modified example. [Diagram 5] FIG. 11 is a front view showing an example of a mixed yarn manufacturing apparatus according to a second modified example. [Figure 6] FIG. 13 is a front view showing an example of a mixed yarn manufacturing apparatus according to a third modified example. [Figure 7] FIG. 13 is a front view showing an example of a mixed yarn manufacturing apparatus according to a fourth modified example. [Figure 8] FIG. 13 is a front view showing an example of a mixed yarn manufacturing apparatus according to a fifth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. For convenience of explanation, the up-down direction, the left-right direction, and the front-rear direction are defined as shown in Fig. 1 and Figs. 3 to 8 described later.

[0029] [1. Overview of the mixed fiber yarn manufacturing equipment] First, an example of a mixed yarn production apparatus 1 according to an embodiment of the present invention (hereinafter referred to as "this embodiment") will be described mainly with reference to Fig. 1. Fig. 1 is a front view showing an example of a mixed yarn production apparatus 1 according to this embodiment.

[0030] The mixed yarn manufacturing apparatus 1 divides a plurality of yarns Y, which are synthetic fiber yarns formed by solidifying molten resin continuously spun from a spinning machine 2, into a first group of yarns Y1 and a second group of yarns Y2, and applies drawing and heat setting to the first group of yarns Y1 to make the first group of yarns Y1 and the second group of yarns Y2 into yarns with different shrinkage rates. Specifically, the mixed yarn manufacturing apparatus 1 applies drawing and heat setting to the first group of yarns Y1 to make them drawn yarns (FDY: Fully Drawn Yarn), and does not apply drawing or heat setting to the second group of yarns Y2 to make them partially oriented yarns (POY: Partially Oriented Yarn). The mixed yarn manufacturing apparatus 1 then mixes the first group of yarns Y1, which is the drawn yarn (FDY), with the second group of yarns Y2, which is the partially oriented yarn (POY), to produce a mixed yarn Y3 (BSY: BiShrinkage Yarn). The mixed yarn Y3, which is made of two types of yarns Y1 and Y2 with different shrinkage rates, is known to have a good texture. In this specification, when the type of yarn is not particularly limited, it will be simply referred to as yarn Y.

[0031] The mixed yarn production apparatus 1 mainly comprises a fiber separating guide 11, a spinning / drawing device 3, yarn feed rollers 12-15, guide rollers 36, 37, a yarn combination guide 20, a fiber mixing device 18, an interlace 16, and a winding device 4. These main components will be described below in the above order.

[0032] [2. Main components of the blended yarn manufacturing equipment] (Fiber Separation Guide 11) The fiber splitting guide 11 is, for example, a comb-shaped guide, and splits all of the yarns Y spun from the spinning machine 2 into a first group of yarns Y1 and a second group of yarns Y2. The yarns Y spun from the spinning machine 2 are arranged in a horizontal left-right direction. The fiber splitting guide 11 is disposed below the spinning machine 2 in a horizontal left-right direction. All of the yarns Y spun from the spinning machine 2 are split into half of the yarns Y1 of the first group and half of the yarns Y2 of the second group by the fiber splitting guide 11. For example, in this embodiment, the number of yarns Y spun from the spinning machine 2 is 16, and they are split into eight yarns Y1 of the first group and eight yarns Y2 of the second group, and finally eight mixed yarns Y3 are generated.

[0033] (Spinning and stretching device 3) The spinning and drawing device 3 is a device that draws and heat sets a first group of yarns Y1 that are separated by the fiber separating guide 11 among the multiple yarns Y spun from the spinning machine 2. The spinning and drawing device 3 is disposed below the spinning machine 2 and the fiber separating guide 11 and forward of the spinning machine 2 and the fiber separating guide 11.

[0034] The spinning and drawing device 3 includes an insulation box 30 and a plurality of (five in this embodiment) heating rollers 31 to 35 housed inside the insulation box 30. The heating rollers 31 to 35 are arranged so that their rotation axes are horizontally aligned in the front-rear direction, and are driven to rotate by an electric motor (not shown).

[0035] The heating rollers 31 to 35 each have a built-in heater (not shown), and heat the yarn Y wound around the peripheral surface of the heating rollers 31 to 35. The heating rollers 31 to 35 all have approximately the same outer diameter.

[0036] Of the five heating rollers 31-35, the three first heating rollers 31-33 located upstream in the yarn running direction are preheating rollers for preheating the first group of yarns Y1 before drawing. The surface temperature of the first heating rollers 31-33 is set to a temperature (e.g., about 80°C) higher than the glass transition point of the yarn Y. On the other hand, of the five heating rollers 31-35, the two second heating rollers 34, 35 located downstream in the yarn running direction are heat-setting rollers for heat-setting the first group of yarns Y1. The surface temperature of the second heating rollers 34, 35 is set to a temperature (e.g., about 130-140°C) higher than the surface temperature of the first heating rollers 31-33.

[0037] In this embodiment, among the five heating rollers 31-35, the three heating rollers 31-33 on the upstream side in the yarn running direction are preheating rollers, and the two heating rollers 34, 35 on the downstream side in the yarn running direction are heat-set rollers, but the number of preheating rollers and heat-set rollers is not limited to this. For example, the two heating rollers 31, 32 on the upstream side in the yarn running direction can be preheating rollers, and the three heating rollers 33-35 on the downstream side in the yarn running direction can be heat-set rollers, or the number of preheating rollers and heat-set rollers can be changed as appropriate.

[0038] Of the three first heating rollers 31-33, the first heating roller 31, which is the most upstream in the yarn running direction, is disposed below the remaining two first heating rollers 32, 33. The second first heating roller 32 in the yarn running direction and the third first heating roller 33 in the yarn running direction are disposed adjacent to each other in the left-right direction. The axis of the second first heating roller 32 in the yarn running direction is located to the right of the axis of the first heating roller 31, which is the most upstream in the yarn running direction. The axis of the third first heating roller 33 in the yarn running direction is located to the left of the axis of the first heating roller 31, which is the most upstream in the yarn running direction.

[0039] The two second heating rollers 34, 35 are disposed adjacent to each other in the left-right direction above the first heating rollers 31 to 33. The second heating roller 34 on the upstream side in the yarn running direction is disposed adjacent to the upper side of the second first heating roller 32 in the yarn running direction. The second heating roller 35 on the downstream side in the yarn running direction is disposed above the third first heating roller 33 in the yarn running direction. The second heating roller 35 on the downstream side in the yarn running direction is disposed shifted upward from the second heating roller 34 on the upstream side in the yarn running direction. More specifically, the axis of the second heating roller 35 on the downstream side in the yarn running direction is located above the axis of the second heating roller 34 on the upstream side in the yarn running direction.

[0040] The rotation speed, i.e., the yarn feeding speed, of the second heating rollers 34, 35 is set to be faster than that of the first heating rollers 31-33. As a result, the first group of yarn Y1 reaches the second heating rollers 34, 35 via the first heating rollers 31-33, and becomes a drawn yarn due to the difference in yarn feeding speed between the first heating roller 33 and the second heating roller 34. The first group of yarn Y1 is then heat-set in a drawn state by the second heating rollers 34, 35. The heat-set first group of yarn Y1 is then led out of the insulation box 30 from a lead-out port 30b, which will be described later, and fed to the yarn feeding roller 13, which will be described later.

[0041] In this embodiment, the difference in yarn feed speed between heating roller 33 and heating roller 34 among the five heating rollers 31 to 35 is used to produce a drawn yarn, but this is not limited to the above. For example, the difference in yarn feed speed between heating roller 32 and heating roller 33 may be used to produce a drawn yarn, and the point at which the difference in yarn feed speed is provided to produce a drawn yarn can be changed as appropriate.

[0042] In this way, the five heating rollers 31 to 35 can be arranged compactly and closely spaced in the left-right and up-down directions, while the first group of yarns Y1 can be stretched and heat-set.

[0043] The thermal insulation box 30 is box-shaped and has an open front side, houses a plurality of heating rollers 31-35, and has a door (not shown) for opening and closing the open front side. An inlet 30a is formed at the lower end of a right wall 301 of the box-shaped thermal insulation box 30 for introducing the first group of yarns Y1 fed from a yarn feeding roller 12 (described later) into the thermal insulation box 30. An outlet 30b is formed at the upper end of the wall 301 for discharging the first group of yarns Y1 that have been subjected to a drawing process and heat set to the outside of the thermal insulation box 30.

[0044] The above-mentioned "inlet 30a" corresponds to the "first opening" of the present invention, and the above-mentioned "outlet 30b" corresponds to the "second opening" of the present invention.

[0045] (Yarn feed rollers 12-15) The yarn feeding rollers 12 to 15 are rotated by an electric motor (not shown). The yarn feeding rollers 12 and 13 are arranged so that their rotation axes are horizontal and extend in the front-rear direction. The yarn feeding rollers 14 and 15 are arranged so that their rotation axes are horizontal and extend in the left-right direction.

[0046] The yarn feed roller 12 is a roller that sends the first group of yarns Y1 separated by the separating guide 11 to the spinning and drawing device 3, and is located at approximately the same height as the inlet 30a formed at the lower end of the wall portion 301 of the heat insulation box 30, and to the right of the inlet 30a. The first group of yarns Y1 separated by the separating guide 11 runs toward the yarn feed roller 12. A yarn path guide 19 is located upstream of the yarn running direction of the yarn feed roller 12, and the arrangement direction of the first group of yarns Y1 is changed from a horizontal left-right direction to a horizontal front-back direction between the separating guide 11 and the yarn path guide 19. That is, the arrangement direction of the first group of yarns Y1 separated by the separating guide 11 is a horizontal left-right direction, but the arrangement direction of the first group of yarns Y1 is changed to a horizontal front-back direction between the separating guide 11 and the yarn path guide 19. The first group of yarns Y1 fed from the yarn feeding roller 12 is introduced into the heat retention box 30 and guided to the first heating roller 31 in a horizontal or nearly horizontal state.

[0047] As described above, the arrangement direction of the first group of yarns Y1 is changed between the separating guide 11 and the yarn path guide 19. However, since the yarn feed roller 12 is positioned at approximately the same height as the inlet 30a formed at the lower end of the right wall 301 of the thermal insulation box 30, the distance from the separating guide 11 to the yarn feed roller 12 can be made as long as possible. Therefore, a sufficient distance can be secured to change the arrangement direction of the first group of yarns Y1 separated by the separating guide 11, making it possible to reduce damage that may be caused to the first group of yarns Y1.

[0048] The yarn feed roller 13 is disposed at approximately the same height as the outlet 30b formed at the upper end of the wall 301 of the heat retention box 30, and to the right of both the outlet 30b and the fiber separating guide 11. In this embodiment, the yarn feed roller 13 is disposed so that the upper surface of the second heating roller 35, which is the most downstream of the multiple heating rollers 31 to 35, and the upper surface of the yarn feed roller 13 are horizontal or approximately horizontal, but this is not essential. That is, the first group of yarns Y1 that have been stretched and heat-set are less likely to be damaged than the second group of yarns Y2 that have not been stretched and heat-set. Therefore, the yarn path of the first group of yarns Y1 from the second heating roller 35 to the yarn feed roller 13 may be downwardly inclined or upwardly inclined as long as the first group of yarns Y1 does not interfere with the heat retention box 30 when they are led out from the outlet 30b.

[0049] The yarn feed roller 14 is a roller that guides the yarn Y fed from the yarn feed roller 13 to the yarn feed roller 15, which is disposed downstream in the yarn running direction of the yarn feed roller 14. The yarn Y fed from the yarn feed roller 13 to the yarn feed roller 14 is a mixed yarn Y3 that is obtained by supplementarily combining the yarn Y1 of the first group and the yarn Y2 of the second group by a fiber mixing device 18 described later.

[0050] A yarn guide 17 is disposed upstream of the yarn feed roller 14 in the yarn running direction, and the mixed yarn Y3 fed from the yarn feed roller 13 is changed in arrangement direction from the horizontal front-to-rear direction to the horizontal left-to-right direction. That is, the mixed yarn Y3 fed from the yarn feed roller 13 is arranged in the horizontal front-to-rear direction, but the mixed yarn Y3 is changed in arrangement direction from the yarn feed roller 13 to the yarn guide 17.

[0051] The mixed yarn Y3 sent from the yarn sending roller 14 is guided to the yarn sending roller 15 downstream in the yarn running direction of the yarn sending roller 14. The mixed yarn Y3 sent from the yarn sending roller 15 has its arrangement direction changed from the left-right direction to the front-back direction, and is sent to the winding device 4.

[0052] (Guide rollers 36, 37) The guide rollers 36, 37 are rotated by an electric motor (not shown) and are arranged so that their rotation axes are in the horizontal front-rear direction. The guide rollers 36, 37 are arranged above and below each other along the wall 301 of the heat-insulating box 30. Specifically, the guide roller 36 is arranged immediately above the yarn feed roller 12 and in close proximity to the wall 301 of the heat-insulating box 30. The guide roller 37 is arranged on the right side of the outlet 30b and in close proximity to the wall 301 of the heat-insulating box 30 so that the roller surface is lower than the first group of yarns Y1 led out from the outlet 30b.

[0053] The second group of yarns Y2 separated by the separating guide 11 travels toward the guide roller 36. A yarn guide 38 is disposed upstream of the guide roller 36 in the yarn traveling direction, and the second group of yarns Y2 is changed in arrangement direction from the horizontal left-right direction to the horizontal front-rear direction between the separating guide 11 and the guide roller 36. That is, the arrangement direction of the first group of yarns Y1 separated by the separating guide 11 is the horizontal left-right direction, but the arrangement direction of the second group of yarns Y2 is changed to the horizontal front-rear direction between the separating guide 11 and the yarn guide 38. The second group of yarns Y2 sent from the guide roller 36 is guided to the guide roller 37 without being introduced into the heat insulation box 30. That is, the second group of yarns Y2 sent from the guide roller 36 is guided to the yarn sending roller 13 via the guide roller 37 without passing through any of the first heating rollers 31 to 33 and the second heating rollers 34 and 35. More specifically, the second group yarn Y2 sent from the guide roller 36 passes through the guide roller 37, the yarn combination guide 20, and the fiber mixing device 18, and is guided to the yarn sending roller 13.

[0054] As described above, the arrangement direction of the second group of yarns Y2 is changed between the separating guide 11 and the yarn guide 38. However, because the guide roller 36 is positioned directly above the yarn feed roller 12, the distance from the separating guide 11 to the yarn guide 38 can be made as long as possible. This makes it possible to ensure a sufficient distance to change the arrangement direction of the second group of yarns Y2 separated by the separating guide 11, thereby reducing possible damage to the second group of yarns Y2.

[0055] The guide roller 37 guides the second group yarn Y2 sent from the guide roller 36 upstream of the guide roller 37 in the yarn running direction to the yarn feed roller 13 downstream of the guide roller 37 in the yarn running direction, via the yarn combination guide 20 and the fiber mixing device 18.

[0056] In addition, when the guide rollers 36, 37 are provided as drive rollers rotated by an electric motor (not shown), the tension of the yarn Y can be adjusted by the rotation speed of the guide rollers 36, 37, making it easier to control the quality of the yarn Y. Therefore, it is preferable that the guide rollers 36, 37 are provided as drive rollers, but they may be provided as driven rollers that rotate due to friction with the second group yarn Y2. However, when the guide rollers 36, 37 are provided as driven rollers, the second group yarn Y2 slides on the guide rollers 36, 37, and the rotation speed of the guide rollers 36, 37 becomes slower than the speed of the second group yarn Y2. Therefore, particularly when the guide roller 37 is provided as a driven roller, when the guide roller 37 comes into contact with the first group yarn Y1, the first group yarn Y1 and the second group yarn Y2 may become entangled due to the speed difference between the first group yarn Y1 and the guide roller. From this viewpoint, it is preferable to use the guide rollers 36, 37 (particularly the guide roller 37) as drive rollers. When the guide rollers 36, 37 are driven rollers, it is preferable to configure them so that air is blown from their surfaces, so that they can rotate with reduced friction with the second group yarn Y2 or without contact with the second group yarn Y2.

[0057] Furthermore, the yarn threading can be performed by guiding the second group of yarns Y2 sent from the guide roller 36 to the yarn feed roller 13 without introducing it into the thermal insulation box 30, which facilitates the yarn threading operation. However, it is not essential to guide the second group of yarns Y2 sent from the guide roller 36 to the yarn feed roller 13 without introducing it into the thermal insulation box 30. For example, the second group of yarns Y2 sent from the guide roller 36 may be introduced into the thermal insulation box 30, and then guided to the yarn feed roller 13 by leading it out of the lead-out port 30b without passing through any of the first heating rollers 31 to 33 and the second heating rollers 34 and 35. Even in this case, the second group of yarns Y2 can be sent to the yarn feed roller 13 without being subjected to any of the drawing treatment and the heat setting.

[0058] The above-mentioned "guide roller 36" corresponds to the "first guide roller" of the present invention, and the above-mentioned "guide roller 37" corresponds to the "second guide roller" of the present invention.

[0059] (Thread combination guide 20) The yarn combination guide 20 is disposed upstream in the yarn running direction of the yarn feed roller 13 and downstream in the yarn running direction of both the second heating roller 35 and the guide roller 37. The yarn combination guide 20 is configured, for example, in a comb shape, for example, as shown in FIG.

[0060] 2 is a perspective view showing an example of the yarn combination guide 20. The yarn combination guide 20 includes a plurality of guide pieces 22 arranged in a row, and a guide rail 26 supporting the guide pieces 22. A yarn accommodating space 24 is formed between one of the plurality of guide pieces 22 and another guide piece 22 adjacent to the one guide piece 22. The yarn combination guide 20 is arranged such that the arrangement direction of the plurality of guide pieces 22 is the horizontal front-rear direction. In other words, the yarn combination guide 20 is arranged such that the arrangement direction of the guide pieces 22 and the rotation axis direction of the yarn feed roller 13 are horizontal and parallel to each other.

[0061] In the yarn combination guide 20, the first group yarn Y1, which has been drawn and heat-set, and the second group yarn Y2, which has not been drawn or heat-set, are stacked one by one and combined through the same yarn storage space 24. The first group yarn Y1 and the second group yarn Y2 are guided in a combined state to the yarn sending roller 13 via the fiber mixing device 18. That is, one yarn of the first group Y1 and one yarn of the second group Y2 are combined to form a set of yarns, which are guided to the same yarn storage space 24 and are guided to the yarn sending roller 13 via the fiber mixing device 18. In this embodiment, for example, eight sets of yarns, each of which is a combination of the first group yarn Y1 and the second group yarn Y2, are guided to different yarn storage spaces 24.

[0062] The second group yarn Y2, which has not been drawn or heat-set, has an unstable tension, and may therefore sway on the yarn feed roller 13. If the yarn sway occurs on the yarn feed roller 13, the friction between the second group yarn Y2 and the surface of the yarn feed roller 13 may damage the second group yarn Y2. In this embodiment, the first group yarn Y1, which has been drawn and heat-set, and the second group yarn Y2, which has not been drawn or heat-set, are combined to form a set of yarns, and then the first group yarn Y1 and the second group yarn Y2 are supplementarily combined by the yarn mixing device 18 to form the mixed yarn Y3, which is then guided to the yarn feed roller 13. In this way, the first group yarn Y1 suppresses the yarn sway of the second group yarn Y2 on the yarn feed roller 13, thereby reducing damage that may be caused to the second group yarn Y2.

[0063] In addition, since the yarn combination guide 20 is arranged so that the arrangement direction of the guide pieces 22 is the horizontal front-rear direction, multiple sets of yarns each composed of the first group yarn Y1 and the second group yarn Y2 can be guided to different yarn accommodating spaces 24. In this manner, all of the multiple second group yarns Y2 are combined with the first group yarn Y1 and guided to the yarn accommodating spaces 24. Therefore, it is possible to suppress yarn sway of the multiple second group yarns Y2 that have not been stretched or heat-set and are combined with the first group yarn Y1 on the yarn feed roller 13. In addition, since the second group yarn Y2 comes into contact with the side and bottom of the guide piece 22, it is possible to further suppress yarn sway of the second group yarn Y2 on the yarn feed roller 13.

[0064] The above-mentioned "guide piece 22" corresponds to the "guide portion" of the present invention.

[0065] The yarn combination guide 20 guides one yarn Y1 of the first group and one yarn Y2 of the second group in the same yarn accommodating space 24, and does not spray compressed air onto the first and second group yarns Y1 and Y2. Therefore, the yarn in which the first and second group yarns Y1 and Y2 are combined by the yarn combination guide 20 is simply a combined yarn, and is not strictly a combined yarn until it is supplementarily combined by the fiber blending device 18. However, in this specification, for convenience, the yarn in which the first and second group yarns Y1 and Y2 are combined by the yarn combination guide 20 will also be described as a supplementarily combined yarn.

[0066] In addition, the yarn combination guide 20 is preferably arranged so that the arrangement direction of the guide pieces 22 is horizontal and parallel to the rotation axis direction of the yarn feed roller 13. In this manner, the guide pieces 22 restrict the movement of the first group yarn Y1 and the second group yarn Y2 in the arrangement direction (front-back direction in FIG. 1), so that supplementary doubling of the first group yarn Y1 and the second group yarn Y2 occurs more easily than on the second yarn feed roller 13. However, as long as a set of yarns formed by combining the first group yarn Y1 and the second group yarn Y2 is guided by the same yarn accommodating space 24, it is not essential that the arrangement direction of the guide pieces 22 is parallel to the rotation axis direction of the yarn feed roller 13.

[0067] (Mixing device 18) Returning to Fig. 1, the yarn mixing device 18 is disposed upstream of the yarn sending roller 13 in the yarn running direction and downstream of both the second heating roller 35 and the guide roller 37 in the yarn running direction. The yarn mixing device 18 supplementarily combines a set of yarns in which a first group yarn Y1 and a second group yarn Y2 are combined by a yarn combination guide 20 on the upstream side of the interlace 16 described later in the yarn running direction. The yarn mixing device 18 is a doubling auxiliary device that injects low-pressure compressed air, the injection pressure of which is set lower than that of the interlace 16, onto multiple sets of yarns in which the first group yarn Y1 and the second group yarn Y2 are combined, and the combined first group yarn Y1 and the second group yarn Y2 are mixed by the action of the low-pressure compressed air, thereby doubling the first group yarn Y1 and the second group yarn Y2. The degree to which the yarn Y1 of the first group and the yarn Y2 of the second group are combined by the fiber mixing device 18 is weaker than that of the interlace 16, and the fiber mixing device 18 plays a supplementary role in combining. In the fiber mixing device 18, the yarn Y1 of the first group and the yarn Y2 of the second group are supplementarily combined to produce a mixed yarn Y3.

[0068] In this way, the yarn combination guide 20 combines the first group of yarns Y1 and the second group of yarns Y2 into one set of yarns, and then the yarn mixing device 18 supplementarily combines the first group of yarns Y1 and the second group of yarns Y2 together, thereby making it possible to further suppress the yarn swaying of the second group of yarns Y2 on the yarn feed roller 13.

[0069] (Interlace 16) The interlace 16 is disposed downstream of the yarn feed roller 13 in the yarn running direction. In this embodiment, the interlace 16 is disposed downstream of the yarn feed roller 14 in the yarn running direction and upstream of the yarn feed roller 15 in the yarn running direction, and is disposed closer to the yarn feed roller 14 than the yarn feed roller 15. The interlace 16 is an intertwining device that injects high-pressure compressed air (fluid) with a compressed air injection pressure set higher than that of the fiber mixing device 18, instantaneously creates nodes in the yarn Y by the action of the high-pressure compressed air, and combines the first group of yarns Y1 and the second group of yarns Y2. As described above, the mixed yarn Y3 that has already been auxiliary-combined by the fiber mixing device 18 is firmly combined by the interlace 16. The mixed yarn Y3, which is firmly combined by the interlace 16 with the first group of yarns Y1 and the second group of yarns Y2, is sent to the winding device 4 via the yarn feed roller 15.

[0070] The above-mentioned "interlace 16" corresponds to the "thread doubling device" of the present invention.

[0071] (Take-up device 4) The winding device 4 includes a plurality of fulcrum guides 41 , a plurality of traverse devices 42 , a contact roller 43 , two bobbin holders 44 , and a turret 45 .

[0072] The plurality of fulcrum guides 41 and the plurality of traverse devices 42 are arranged in a line corresponding to each other in the front-rear direction, and are illustrated overlapping each other in the front-rear direction in Fig. 1. The plurality of mixed yarns Y3 fed to the winding device 4 are traversed in the front-rear direction by the corresponding traverse devices 42 around the plurality of fulcrum guides 41.

[0073] The contact roller 43 is configured to come into contact with the surfaces of the multiple packages P and apply a predetermined contact pressure to adjust the shape of the packages P. The multiple packages P are arranged side by side in the front-rear direction, and are shown overlapping in the front-rear direction in Fig. 1. The bobbin holder 44 extends in the front-rear direction, and is configured to be able to mount multiple bobbins B lined up in the front-rear direction.

[0074] The bobbin holder 44 is rotated by an electric motor (not shown). The turret 45 supports the two bobbin holders 44 in a cantilevered state, and is configured to be rotated by an electric motor (not shown). In the winding device 4, the turret 45 is rotated to switch the positions of the two bobbin holders 44 between an upper winding position and a lower standby position.

[0075] The winding device 4 rotates the bobbin holder 44 at the upper winding position to wind the mixed yarns Y3 onto the bobbins B to form the packages P. When the packages P are completed, the turret 45 is rotated to switch the positions of the two bobbin holders 44. Then, the mixed yarns Y3 are wound onto the bobbins B attached to the bobbin holder 44 that has been newly moved to the winding position.

[0076] In this embodiment, the winding device 4 has two bobbin holders 44, but is not limited to this, and the number of bobbin holders 44 may be one.

[0077] (Arrangement of guide roller 37, yarn combination guide 20, fiber mixing device 18, and yarn feed roller 13) Next, the arrangement of the guide roller 37, the yarn combination guide 20, the fiber mixing device 18, and the yarn sending roller 13 will be described with reference to Figures 1 and 3. Figure 3 is a schematic diagram showing an example of a suitable arrangement pattern of the guide roller 37, the yarn combination guide 20, the fiber mixing device 18, and the yarn sending roller 13 in the mixed fiber yarn manufacturing apparatus 1 according to the embodiment of the present invention.

[0078] Considering possible damage to the second group yarn Y2, an ideal yarn path of the second group yarn Y2 from the guide roller 37 to the yarn feed roller 13 is a straight line. In other words, it is preferable that the yarn path of the second group yarn Y2 from the guide roller 37 to the yarn feed roller 13 via the yarn combination guide 20 and the fiber mixing device 18 is a straight line without any bends along the way. The following description will be given on this premise.

[0079] First, the significance of providing the guide roller 37 will be explained. As described above, by making the distance from the separating guide 11 to the yarn path guide 38 as long as possible, a sufficient distance can be secured to change the arrangement direction of the second group of yarns Y2 separated by the separating guide 11. However, if the guide roller 37 is not provided and the second group of yarns Y2 are guided from the guide roller 36 to the yarn combination guide 20, it is difficult to suitably reduce damage to the second group of yarns Y2. In detail, if the yarn combination guide 20 is arranged so that the second group of yarns Y2 is not bent, the first group of yarns Y1 led out from the lead-out port 30b may be bent at the yarn combination guide 20. Although the first group of yarns Y1 are stretched and heat set, if the first group of yarns Y1 are bent too much, it may cause damage to the first group of yarns, which is not preferable. In addition, if the first group of yarns Y1 is bent too much, the first group of yarns Y1 may interfere with the thermal insulation box 30 when being led out from the lead-out port 30b. On the other hand, if the yarn combination guide 20 is arranged so that the first group of yarns Y1 is not bent by the yarn combination guide 20, the second group of yarns Y2 may be bent. Therefore, in this embodiment, the guide roller 37 is arranged downstream of the guide roller 36 in the yarn running direction and above the guide roller 36. By doing so, even if a distance required to change the arrangement direction of the second group of yarns Y2 separated by the separating guide 11 is secured, it is possible to reduce damage to the second group of yarns Y2 while preventing the first group of yarns Y1 from being bent too much.

[0080] Next, on the premise that the guide roller 37 is disposed downstream of the guide roller 36 in the yarn running direction and above the guide roller 36, a suitable arrangement of the guide roller 37, the yarn combination guide 20, the fiber mixing device 18, and the yarn feed roller 13 will be described.

[0081] The ideal arrangement of the yarn combination guide 20, the fiber mixing device 18, the guide roller 37, and the yarn feed roller 13 is, for example, as shown in FIG. 1 , such that the yarn path of the first group of yarn Y1 from the second heating roller 35, which is the most downstream in the yarn running direction of the first group of yarn Y1, to the yarn feed roller 13 is linear in a front view inside the thermal insulation box, and the yarn path of the second group of yarn Y2 from the guide roller 37 to the yarn feed roller 13 is linear in a front view inside the thermal insulation box. That is, in a front view, the yarn combination guide 20, the fiber mixing device 18, the guide roller 37, and the yarn feed roller 13 are ideally arranged so as to satisfy the following conditions: "of the two angles sandwiched between the yarn path of the first group of yarn Y1 from the second heating roller 35, which is the most downstream in the yarn running direction of the first group of yarn Y1 in the heat-retaining box, to the yarn combination guide 20, and the yarn path from the combination guide 20 to the yarn feed roller 13, the upper angle (α shown in FIG. 3 described later) is 180°" and "of the two angles sandwiched between the yarn path of the second group of yarn Y2 from the guide roller 37 to the yarn combination guide 20, and the yarn path from the yarn combination guide 20 to the yarn feed roller 13, the lower angle (β shown in FIG. 3 described later) is 180°." In FIG. 1, on the upstream side of the yarn running direction of the yarn combination guide 20, the yarn path of the first group of yarn Y1 and the yarn path of the second group of yarn Y2 are the same, and neither the first group of yarn Y1 nor the second group of yarn Y2 is bent in the yarn combination guide 20.

[0082] However, the preferred arrangement of the yarn combination guide 20, the fiber mixing device 18, and the guide roller 37 is not limited to the arrangement shown in FIG. 1, and may be, for example, the arrangements shown in FIGS. 3(A) to (D).

[0083] Figure 3(A) shows an arrangement pattern in which, when viewed from the front, the upper angle α of the two angles sandwiched between the yarn path of the first group of yarns Y1 from the second heating roller 35 (see Figure 1) to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is less than 180°, and the lower angle β of the two angles sandwiched between the yarn path of the second group of yarns Y2 from the guide roller 37 to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is 180°.

[0084] 3B is a diagram showing an arrangement pattern in which, in a front view, the upper angle α of the two angles between the yarn path of the first group of yarns Y1 from the second heating roller 35 (see FIG. 1) to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is less than 180°, and the lower angle β of the two angles between the yarn path of the second group of yarns Y2 from the guide roller 37 to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is less than 180°. That is, the angle β is not necessarily limited to 180°, although an ideal angle is 180°. However, in consideration of possible damage to the yarn 2 of the second group, the angle β is preferably 150° or more.

[0085] 3(C) is a diagram showing an arrangement pattern in which, in a front view, the upper angle α of the two angles sandwiched between the yarn path of the first group of yarns Y1 from the second heating roller 35 (see FIG. 1) to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is less than 180°, and the lower angle β of the two angles sandwiched between the yarn path of the second group of yarns Y2 from the guide roller 37 to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is greater than 180°. In other words, the angle β may be greater than 180°. However, in consideration of possible damage to the yarn 2 of the second group, the angle β is preferably 210° or less. In addition, since it is physically impossible for the yarn path of the second group yarn Y2 to be above the yarn path of the first group yarn Y1, when the above angle β is 180° or more, the yarn path of the first group yarn Y1 and the yarn path of the second group yarn Y2 are the same, or the yarn path of the first group yarn Y1 is above the yarn path of the second group yarn Y2.

[0086] 3(D) is a diagram showing an arrangement pattern in which, in a front view, the upper angle α of the two angles between the yarn path of the first group of yarns Y1 from the second heating roller 35 (see FIG. 1) to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is greater than 180°, and the lower angle β of the two angles between the yarn path of the second group of yarns Y2 from the guide roller 37 to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is less than 180°. That is, the angle α may be greater than 180°. However, even in this case, in consideration of possible damage to the second group of yarns 2, the angle β is preferably 150° or greater.

[0087] The arrangement of the yarn combination guide 20, the fiber mixing device 18, and the guide roller 37 is not limited to the pattern shown in FIG. 1 and FIG. 3(A)-(D), and may be any arrangement that satisfies that the above angle α is 180±30° (upper and lower limits included) and the above angle β is 180±30° (upper and lower limits included).

[0088] Thus, when viewed from the front, if the angle β is 180±30° (including upper and lower limits), it is possible to reduce damage that may be caused to the second group of yarns Y2 (particularly in the yarn combination guide 20) before they are guided to the yarn feed roller 13. More specifically, even if a sufficient distance is secured to change the arrangement direction of the second group of yarns Y2 separated by the yarn separating guide 11 (see FIG. 1), it is possible to reduce damage that may be caused to the second group of yarns Y2, particularly in the yarn combination guide 20, while suppressing yarn sway of the second group of yarns Y2 on the yarn feed roller 13.

[0089] 3(A) to 3(D), the upper angle α of the two angles between the yarn path of the first group of yarns Y1 from the second heating roller 35 (see FIG. 1) to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is less than 180°, but is not limited to this. If the angle α is 180±30°, damage to the first group of yarns Y1 can be reduced. Also, there is little risk that the first group of yarns Y1 led out from the lead-out port 30b will interfere with the thermal insulation box 30.

[0090] In addition, when the most downstream roller among the multiple rollers 31-35 (see FIG. 1) arranged inside the thermal insulation box 30 is not the second heating roller 35 but another roller, the above-mentioned "yarn path of the first group of yarns Y1 from the second heating roller 35 (see FIG. 1) to the yarn combination guide 20" is replaced with "the yarn path of the first group of yarns Y1 from the other roller to the yarn combination guide 20."

[0091] [3. Effects] As described above, according to this embodiment, the mixed yarn manufacturing apparatus 1 includes a yarn combination guide 20 that guides a yarn that is a combination of the first group yarn Y1 that has been drawn and heat-set and the second group yarn Y2 that has not been drawn and heat-set. The yarn combination guide 20 is disposed upstream in the yarn running direction from both the fiber mixing device 18 and the yarn feed roller 13. The set of yarns that is a combination of the first group yarn Y1 and the second group yarn Y2 is supplementarily combined in the fiber mixing device 18 and guided to the yarn feed roller 13. Therefore, the first group yarn Y1 can suppress the yarn sway of the second group yarn Y2 on the yarn feed roller 13, and damage that may be caused to the second group yarn Y2 can be reduced.

[0092] The yarn combination guide 20 has a plurality of guide pieces 22 arranged along the axial direction of the yarn feed roller 13, each of which combines and guides one of the yarns Y1 of the first group and one of the yarns Y2 of the second group. Therefore, with the axial direction of the yarn feed roller 13 being the arrangement direction, a plurality of pairs of yarns each combining the yarns Y1 of the first group and the yarns Y2 of the second group are guided to the fiber mixing device 18. Therefore, for all of the yarns Y2 of the second group that have not been drawn and heat-set (all of the yarns Y2 of the second group in the arrangement direction), yarn sway can be suppressed by the drawn and heat-set yarns Y1 of the first group.

[0093] In addition, the separating guide 11 is arranged horizontally along the left-right direction, and the yarn feed roller 13 is arranged so that its axial direction is horizontal and front-to-back. The second group of yarns Y2 separated by the separating guide 11 changes its arrangement direction and is guided to the guide roller 36. Therefore, even if the distance required to change the arrangement direction of the second group of yarns Y2 separated by the separating guide 11 is secured, by arranging the guide roller 37 above the guide roller 36 so that its axial direction is parallel to the guide roller 36, it is possible to suitably reduce damage to the second group of yarns Y2 and thus suppress yarn breakage of the second group of yarns Y2.

[0094] In addition, when viewed from the front, the guide roller 37, the yarn feed roller 13, and the yarn combination guide 20 are positioned so that the upper angle α of the two angles sandwiched between the yarn path of the first group of yarns Y1 from the second heating roller 35 to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is 180° (upper and lower limits included), and the lower angle of the two angles sandwiched between the yarn path of the second group of yarns Y2 from the guide roller 37 to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 is 180° (upper and lower limits included). By arranging the guide roller 37, the yarn feed roller 13, and the yarn combination guide 20 in this manner, even if a sufficient distance is secured to change the arrangement direction of the second group of yarns Y2 separated by the separating guide 11, it is possible to suppress yarn sway of the second group of yarns Y2 on the yarn feed roller 13, while reducing damage that may be inflicted on the first group of yarns Y1 and the second group of yarns Y2, particularly in the yarn combination guide 20. In addition, there is little risk that the first group of yarns Y1 led out from the lead-out port 30b will interfere with the thermal insulation box 30.

[0095] Furthermore, the guide roller 37 is disposed so that the second group of yarns Y2 guided to the yarn feed roller 13 is lower than the first group of yarns Y1 guided to the yarn feed roller 13. In this manner, the first group of yarns Y1 is positioned higher than the second group of yarns Y2, and yarn sway of the second group of yarns Y2 on the yarn feed roller 13 can be more reliably suppressed.

[0096] In addition, the guide roller 36 and the guide roller 37 are arranged in the vertical direction along the wall portion 301 of the thermal insulation box 30. In this way, it is possible to prevent the mixed yarn manufacturing apparatus 1 from becoming large in the horizontal direction and reduce damage to the second group yarn Y2.

[0097] In addition, the guide roller 36 and the guide roller 37 are disposed outside the heat-insulating box 30, and the second group of yarns Y2 separated by the separating guide 11 is guided to the yarn feed roller 13 without entering the heat-insulating box 30. This makes it possible to easily thread the second group of yarns Y2.

[0098] [4. Modifications] The mixed yarn manufacturing apparatus 1 of the present embodiment described above is an example of the best mode for carrying out the present invention, but as shown in the following first to fifth modified examples, the mixed yarn manufacturing apparatus 1 of the present embodiment may be modified. Below, the first to fifth modified examples in which the mixed yarn manufacturing apparatus 1 of the present embodiment is modified will be described. Note that the description of the components common to the main components of the mixed yarn manufacturing apparatus 1 described above will be omitted, and the description will focus mainly on the components different from the main components of the mixed yarn manufacturing apparatus 1. However, in describing the mixed yarn manufacturing apparatuses 1A to 1E according to each modified example, the main components of each of the mixed yarn manufacturing apparatuses 1A to 1E will be given the same reference numerals as the main components of the mixed yarn manufacturing apparatus 1.

[0099] [4-1. First modified example] 4 is a front view showing an example of a mixed yarn manufacturing apparatus 1A according to the first modification. The mixed yarn manufacturing apparatus 1A according to the first modification is an example of the best mode along with the mixed yarn manufacturing apparatus 1 of this embodiment. The mixed yarn manufacturing apparatus 1A according to the first modification is different from the mixed yarn manufacturing apparatus 1 according to this embodiment in the position of the mixing device 18. Specifically, in the mixed yarn manufacturing apparatus 1A according to the first modification, the mixing device 18 is arranged downstream of the yarn sending roller 13 in the yarn running direction. More specifically, it is arranged downstream of the yarn sending roller 13 in the yarn running direction and upstream of the yarn sending roller 14 in the yarn running direction, and is closer to the yarn sending roller 13 than the yarn sending roller 14.

[0100] In this way, when the yarn mixing device 18 is disposed downstream of the yarn feed roller 13 in the yarn running direction, a set of yarns in which the yarn Y1 of the first group and the yarn Y2 of the second group are combined by the yarn combination guide 20 is guided to the yarn feed roller 13 before being supplementarily combined. Even in this case, the yarn Y1 of the first group and the yarn Y2 of the second group are guided to the yarn feed roller 13 in a combined state, so that the yarn Y1 of the first group, which has been drawn and heat-set, suppresses the yarn sway of the yarn Y2 of the second group, which has not been drawn and heat-set, on the yarn feed roller 13. Therefore, even in the mixed yarn manufacturing apparatus 1A, as in the mixed yarn manufacturing apparatus 1 according to this embodiment, the yarn Y1 of the first group suppresses the yarn sway of the yarn Y2 of the second group on the yarn feed roller 13, making it possible to reduce damage that may be caused to the yarn Y2 of the second group.

[0101] In particular, because the roller surface of the guide roller 37 is below the first group of yarns Y1 led out from the lead-out port 30b, it is considered that the second group of yarns Y2 fed from the guide roller 37 to the yarn combination guide 20 will be located below the first group of yarns Y1 led out from the thermal insulation box 30 and fed to the yarn combination guide 20. Therefore, in the yarn accommodating space 24 and the yarn feed roller 13, the second group of yarns Y2 are pressed from above by the first group of yarns Y1, which is considered to further suppress yarn swaying of the second group of yarns Y2 on the yarn feed roller 13.

[0102] In Fig. 4 showing the first modified example, the arrangement pattern of the guide roller 37, the yarn combination guide 20, and the yarn feed roller 13 is the same as the arrangement pattern shown in Fig. 3(B) (the position of the fiber mixing device 18 is different). However, the arrangement pattern of the guide roller 37, the yarn combination guide 20, and the yarn feed roller 13 is not limited to this, and may be any of the arrangement patterns shown in Fig. 1, the arrangement pattern shown in Fig. 3(A), the arrangement pattern shown in Fig. 3(C), and the arrangement pattern shown in Fig. 3(D). By arranging the guide roller 37, the yarn combination guide 20, and the yarn feed roller 13 in this manner, it is possible to suppress the yarn swing of the second group of yarns Y2 on the yarn feed roller 13 and reduce damage that may be given to the first group of yarns Y1 and the second group of yarns Y2, especially in the yarn combination guide 20, as in the mixed yarn manufacturing device 1 according to this embodiment, even if a sufficient distance is secured to change the arrangement direction of the second group of yarns Y2 separated by the fiber separating guide 11. In addition, there is little risk that the first group of yarns Y1 led out from the lead-out port 30b will interfere with the thermal insulation box 30.

[0103] [4-2. Second modified example] 5 is a front view showing an example of a mixed yarn production apparatus 1B according to a second modified example. The mixed yarn production apparatus 1B according to the second modified example differs from the mixed yarn production apparatus 1 according to this embodiment in that it does not include a guide roller 37 (there is only one roller, the guide roller 36, that guides the second group of separated yarns Y2 to the yarn sending roller 13). Specifically, in the mixed yarn production apparatus 1B, the second group of yarns Y2 separated by the separating guide 11 are guided from the guide roller 36 to the yarn combination guide 20 and the yarn mixing device 18, and then to the yarn sending roller 13. The second group of yarns Y2 do not pass through any of the first heating rollers 31-33 and the second heating rollers 34,35.

[0104] In this way, if the mixed yarn manufacturing apparatus 1B does not have the guide roller 37, the yarn path from the guide roller 36 to the yarn feed roller 13 will not be linear, and the second group yarn Y2 may be bent in the yarn combination guide 20. In addition, the distance from the guide roller 36 to the yarn feed roller 13 is greater than the distance from the guide roller 37 to the yarn feed roller 13. In this respect, the mixed yarn manufacturing apparatus 1B according to the second modification is different from the mixed yarn manufacturing apparatus 1 according to the present embodiment and the mixed yarn manufacturing apparatus 1A according to the first modification. However, even in the mixed yarn manufacturing apparatus 1B according to the second modification, the first group yarn Y1 that has been drawn and heat-set and the second group yarn Y2 that has not been drawn or heat-set are combined to form a set of yarns, and then the first group yarn Y1 and the second group yarn Y2 are supplementarily combined to form the mixed yarn Y3, and this mixed yarn Y3 is guided to the yarn feed roller 13. Therefore, like the mixed yarn manufacturing apparatus 1 of this embodiment, the mixed yarn manufacturing apparatus 1B can suppress the yarn sway of the second group of yarns Y2 on the yarn feed roller 13 by the first group of yarns Y1, thereby reducing damage that may be caused to the second group of yarns Y2.

[0105] [4-3.Third modified example] 6 is a front view showing an example of a mixed yarn manufacturing apparatus 1C according to the third modified example. The mixed yarn manufacturing apparatus 1C according to the third modified example differs from the mixed yarn manufacturing apparatus 1 according to this embodiment in that the mixing device 18 is disposed downstream of the yarn sending roller 13 in the yarn running direction, and in that the mixed yarn manufacturing apparatus 1C does not include the guide roller 37 (the guide roller 36 is the only roller that guides the second group of split yarns Y2 to the yarn sending roller 13). That is, the mixed yarn manufacturing apparatus 1C is similar to the mixed yarn manufacturing apparatus 1A according to the first modified example described above in that the mixing device 18 is disposed downstream of the yarn sending roller 13 in the yarn running direction, and is similar to the mixed yarn manufacturing apparatus 1B according to the second modified example described above in that the mixed yarn manufacturing apparatus 1C does not include the guide roller 37.

[0106] That is, in the mixed yarn manufacturing apparatus 1C, like the mixed yarn manufacturing apparatus 1B of the second modification, the yarn path from the guide roller 36 to the yarn feed roller 13 is not linear, and the yarn Y2 of the second group may be bent in the yarn combination guide 20. In addition, the distance from the guide roller 36 to the yarn feed roller 13 is greater than the distance from the guide roller 37 to the yarn feed roller 13. In this respect, the mixed yarn manufacturing apparatus 1C of the third modification is different from the mixed yarn manufacturing apparatus 1 of this embodiment and the mixed yarn manufacturing apparatus 1A of the first modification. Furthermore, before the yarn Y1 of the first group and the yarn Y2 of the second group are supplementarily mixed, the yarn Y1 of the first group and the yarn Y2 of the second group are guided to the yarn feed roller 13 as a set of combined yarns. In this respect, the mixed yarn manufacturing apparatus 1C of the third modification is different from the mixed yarn manufacturing apparatus 1 of this embodiment and the mixed yarn manufacturing apparatus 1B of the second modification. However, even in the mixed yarn manufacturing apparatus 1C according to the third modified example, the yarn Y1 of the first group and the yarn Y2 of the second group are combined and guided to the yarn feed roller 13 as a set of yarns. Therefore, like the mixed yarn manufacturing apparatus 1 according to the present embodiment, the mixed yarn manufacturing apparatus 1C can suppress the yarn sway of the yarn Y2 of the second group on the yarn feed roller 13 by the yarn Y1 of the first group, and can reduce damage that may be caused to the yarn Y2 of the second group.

[0107] [4-4. Fourth Modification] Fig. 7 is a front view showing an example of a mixed yarn production apparatus 1D according to a fourth modified example. The mixed yarn production apparatus 1D according to the fourth modified example does not include a guide roller 37 (the guide roller 36 is the only roller that guides the separated second group of yarns Y2 to the yarn feed roller 13), and differs from the mixed yarn production apparatus 1 according to this embodiment in that the guide roller 36 is placed at an arbitrary position within a range that does not interfere with the first group of yarns Y1 led out from the lead-out port 30b. In Fig. 7, the guide roller 36 is placed on the right side of the lead-out port 30b and close to the wall part 301 of the thermal insulation box 30, but is not limited to this.

[0108] In the mixed yarn manufacturing apparatus 1D, the second group of yarns Y2 separated by the separating guide 11 is guided from the guide roller 36 arranged on the right side of the outlet 30b of the heat insulation box 30 and close to the wall 301 of the heat insulation box 30 to the yarn combination guide 20 and the fiber mixing device 18 to the yarn sending roller 13. In this case, a yarn guide 38 is arranged upstream of the guide roller 36 in the yarn running direction, and the arrangement direction of the second group of yarns Y2 is changed from the horizontal left-right direction to the horizontal front-back direction between the separating guide 11 and the yarn guide 38. The second group of yarns Y2 does not pass through any of the first heating rollers 31 to 33 and the second heating rollers 34, 35.

[0109] In the mixed yarn manufacturing apparatus 1D according to the fourth modified example, the first group yarn Y1 that has been drawn and heat-set is combined with the second group yarn Y2 that has not been drawn or heat-set to form a set of yarns, and then the combined first group yarn Y1 and second group yarn Y2 are supplementarily combined to form the mixed yarn Y3, which is guided to the yarn feed roller 13. Therefore, like the mixed yarn manufacturing apparatus 1 according to the present embodiment, the mixed yarn manufacturing apparatus 1D can suppress the yarn sway of the second group yarn Y2 on the yarn feed roller 13 by the first group yarn Y1, and can reduce damage that may be caused to the second group yarn Y2.

[0110] 7 showing the fourth modified example, the guide roller 36 can be disposed at any position as long as it does not interfere with the first group of yarns Y1 led out from the lead-out port 30b as described above, but the guide roller 36, the yarn combination guide 20, and the yarn feed roller 13 may be disposed at the same positions as the guide roller 37, the yarn combination guide 20, and the yarn feed roller 13 shown in Fig. 1 and Figs. 3(A) to (D). In this way, the lower of the two angles sandwiched between the yarn path of the second group of yarns Y2 from the guide roller 36 to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 can be set to 180±30° in a front view. That is, although a sufficient distance cannot be secured to change the arrangement direction of the second group of yarns Y2 separated by the separating guide 11, it is possible to suppress yarn sway of the second group of yarns Y2 on the yarn feed roller 13 and reduce damage that may be inflicted on the first group of yarns Y1 and the second group of yarns Y2, particularly in the yarn combination guide 20. In addition, there is little risk that the first group of yarns Y1 led out from the lead-out port 30b will interfere with the thermal insulation box 30.

[0111] [4-5. Fifth Modification] FIG. 8 is a front view showing an example of a mixed yarn manufacturing apparatus 1E according to the fifth modified example. The mixed yarn manufacturing apparatus 1E according to the fifth modified example does not have a guide roller 37, as in the mixed yarn manufacturing apparatus 1D according to the fourth modified example, and the guide roller 36 is arranged at an arbitrary position within a range where it does not interfere with the first group of yarns Y1 led out from the lead-out port 30b. In this respect, the mixed yarn manufacturing apparatus 1E according to the fifth modified example differs from the mixed yarn manufacturing apparatus 1 according to this embodiment. That is, the mixed yarn manufacturing apparatus 1E is similar to the mixed yarn manufacturing apparatus 1D according to the fourth modified example described above in that the guide roller 36 is arranged at an arbitrary position within a range where it does not interfere with the first group of yarns Y1 led out from the lead-out port 30b, and is similar to the mixed yarn manufacturing apparatus 1A according to the first modified example and the mixed yarn manufacturing apparatus 1C according to the third modified example described above in that the mixing device 18 is arranged downstream of the yarn sending roller 13 in the yarn running direction.

[0112] That is, in the mixed yarn manufacturing apparatus 1E, the second group of yarns Y2 separated by the separating guide 11 is guided from the guide roller 36 arranged on the right side of the outlet 30b of the thermal insulation box 30 and close to the wall 301 of the thermal insulation box 30, via the yarn combination guide 20, to the yarn sending roller 13. In this case, as in the mixed yarn manufacturing apparatus 1D of the fourth modified example, a yarn guide 38 is arranged upstream of the guide roller 36 in the yarn running direction, and the arrangement direction of the second group of yarns Y2 is changed from the horizontal left-right direction to the horizontal front-rear direction between the separating guide 11 and the yarn guide 38. The second group of yarns Y2 does not pass through any of the first heating rollers 31 to 33 and the second heating rollers 34 and 35. In the mixed yarn manufacturing apparatus 1E, the yarn Y1 of the first group and the yarn Y2 of the second group are guided to the yarn feed roller 13 as a set of yarns before the yarn Y1 of the first group and the yarn Y2 of the second group are supplementarily mixed. In this respect, the mixed yarn manufacturing apparatus 1E of the fifth modified example differs from the mixed yarn manufacturing apparatus 1 of the present embodiment, the mixed yarn manufacturing apparatus 1B of the second modified example, and the mixed yarn manufacturing apparatus 1D of the fourth modified example. However, even in the mixed yarn manufacturing apparatus 1E of the fifth modified example, the yarn Y1 of the first group and the yarn Y2 of the second group are guided to the yarn feed roller 13 as a set of yarns. Therefore, the mixed yarn manufacturing apparatus 1E, like the mixed yarn manufacturing apparatus 1 of the present embodiment, can suppress the yarn sway of the yarn Y2 of the second group on the yarn feed roller 13 by the yarn Y1 of the first group, and can reduce damage that may be caused to the yarn Y2 of the second group.

[0113] In addition, in FIG. 8 showing the fifth modified example, as in the fourth modified example, the guide roller 36, the yarn combination guide 20, and the yarn feed roller 13 may be disposed in the same positions as the guide roller 37, the yarn combination guide 20, and the yarn feed roller 13 shown in FIG. 1 and FIG. 3(A)-(D). In this way, the lower angle of the two angles sandwiched between the yarn path of the second group of yarns Y2 from the guide roller 36 to the yarn combination guide 20 and the yarn path from the yarn combination guide 20 to the yarn feed roller 13 can be set to 180±30° in a front view. In other words, although a sufficient distance cannot be secured to change the arrangement direction of the second group of yarns Y2 separated by the separating guide 11, it is possible to suppress the yarn swing of the second group of yarns Y2 on the yarn feed roller 13 and to reduce damage that may be caused to the first group of yarns Y1 and the second group of yarns Y2, particularly in the yarn combination guide 20. In addition, there is little risk that the first group of yarns Y1 led out from the lead-out port 30b will interfere with the thermal insulation box 30. [Explanation of symbols]

[0114] 1. Blended yarn manufacturing equipment 2. Spinning machine 11 Fiber Separation Guide 12 First yarn feed roller 13 Second yarn feed roller 16 Interlaced 18 Mixing device 20 Thread combination guide 30 Heat insulation box 30a Introduction 30b outlet 31-33 First heating roller 34, 35 Second heating roller 36 First guide roller 37 Second guide roller 301 Wall section Y Thread Y1 1st group yarn Y2 2nd group yarn Y3 blended yarn

Claims

1. A mixed fiber yarn manufacturing apparatus that manufactures a mixed fiber yarn by performing different processes on the yarns of the first group and the yarns of the second group among a plurality of yarns spun from a spinning machine, and then mixing the yarns of the first group and the yarns of the second group, a fiber separation guide for separating the plurality of yarns into the yarns of the first group and the yarns of the second group, a first heating roller for heating the yarns of the first group separated by the fiber separation guide, a second heating roller disposed downstream in the yarn running direction of the first heating roller, for stretching and heat setting the yarns of the first group between the yarns and the first heating roller, a heat preservation box that houses the first heating roller and the second heating roller, and has a first opening formed in the lower part of the wall and a second opening formed in the upper part of the wall, a first yarn feed roller for causing the yarns of the first group separated by the fiber separation guide to enter the heat preservation box from the first opening, a second yarn feed roller that enters the heat preservation box from the first opening, and after passing through the first heating roller and the second heating roller, guides the yarns of the first group led out of the heat preservation box from the second opening, a guide roller for guiding the yarns of the second group separated by the fiber separation guide to the second yarn feed roller without passing through any of the first heating roller and the second heating roller, a yarn combining device disposed downstream in the yarn running direction of the second yarn feed roller for combining the yarns of the first group and the yarns of the second group, a mixed fiber device disposed upstream in the yarn running direction of the yarn combining device for assisting in combining the yarns of the first group and the yarns of the second group, A yarn combination guide having a plurality of guides along the axial direction of the second yarn feed roller, disposed downstream in the yarn running direction of both the second heating roller and the guide roller, and upstream in the yarn running direction of both the mixed fiber device and the second yarn feed roller, for combining and guiding the stretched and heat set yarns of the first group and the non-stretched and non-heat set yarns of the second group, A mixed fiber yarn manufacturing apparatus characterized by comprising the above.

2. The guide roller is arranged such that the lower angle among the two angles formed between the yarn path of the second group of yarns from the guide roller to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feed roller is 180 ± 30 [°]. The mixed fiber yarn manufacturing apparatus according to claim 1, characterized in that.

3. The mixed fiber device is arranged on the upstream side in the yarn running direction from the second yarn feed roller, and is configured to auxiliary ply the combined first group of yarns and the second group of yarns, and guide the auxiliary plied yarns to the second yarn feed roller. The mixed fiber yarn manufacturing apparatus according to claim 1, characterized in that.

4. The mixed fiber device is arranged on the upstream side in the yarn running direction from the second yarn feed roller, and is configured to auxiliary ply the combined first group of yarns and the second group of yarns, and guide the auxiliary plied yarns to the second yarn feed roller. The mixed fiber yarn manufacturing apparatus according to claim 2, characterized in that.

5. A plurality of yarns spun from the spinning machine are arranged along a horizontal one direction, and the fiber separating guide is arranged along the horizontal one direction. The second yarn feed roller is arranged such that its axial direction is horizontal and perpendicular to the one direction. The guide roller is arranged such that its axial direction is parallel to the second yarn feed roller, and includes a first guide roller for guiding the second group of yarns separated by the fiber separating guide while changing the arrangement direction, and a second guide roller arranged on the downstream side in the yarn running direction of the first guide roller and above the first guide roller, and having an axial direction parallel to the first guide roller. The mixed fiber yarn manufacturing apparatus according to claim 1, characterized in that.

6. A plurality of yarns spun from the spinning machine are arranged along a horizontal one direction, and the fiber separating guide is arranged along the horizontal one direction. The second yarn feed roller is arranged such that its axial direction is horizontal and orthogonal to the one direction. The guide roller is arranged such that its axial direction is parallel to that of the second yarn feed roller, and is a first guide roller for guiding the second group of yarns separated by the fiber separation guide while changing the arrangement direction. and a second guide roller which is arranged on the downstream side in the yarn running direction of the first guide roller and above the first guide roller such that its axial direction is parallel to that of the first guide roller. The mixed fiber yarn manufacturing apparatus according to claim 2, characterized in that.

7. A plurality of yarns spun from the spinning machine are arranged along a horizontal one direction, and the fiber separation guide is arranged along the horizontal one direction. The second yarn feed roller is arranged such that its axial direction is horizontal and orthogonal to the one direction. The guide roller is arranged such that its axial direction is parallel to that of the second yarn feed roller, and is a first guide roller for guiding the second group of yarns separated by the fiber separation guide while changing the arrangement direction. and a second guide roller which is arranged on the downstream side in the yarn running direction of the first guide roller and above the first guide roller such that its axial direction is parallel to that of the first guide roller. The mixed fiber yarn manufacturing apparatus according to claim 3, characterized in that.

8. A plurality of yarns spun from the spinning machine are arranged along a horizontal one direction, and the fiber separation guide is arranged along the horizontal one direction. The second yarn feed roller is arranged such that its axial direction is horizontal and orthogonal to the one direction. The guide roller is arranged such that its axial direction is parallel to that of the second yarn feed roller, and is a first guide roller for guiding the second group of yarns separated by the fiber separation guide while changing the arrangement direction. A second guide roller that is downstream of the first guide roller in the yarn running direction and is arranged above the first guide roller so that its axial direction is parallel to that of the first guide roller. The mixed fiber yarn manufacturing apparatus according to claim 4, characterized in that.

9. The second guide roller, the second yarn feed roller, and the yarn combination guide are Among the two angles formed by the yarn path of the first group of yarns from the most downstream roller in the yarn running direction of the first group of yarns in the heat preservation box to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feed roller, the upper angle is 180 ± 30 [°] (including the upper and lower limit values), and Among the two angles formed by the yarn path of the second group of yarns from the second guide roller to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feed roller, the lower angle is arranged to be 180 ± 30 [°] (including the upper and lower limit values). The mixed fiber yarn manufacturing apparatus according to claim 5, characterized in that.

10. The second guide roller, the second yarn feed roller, and the yarn combination guide are Among the two angles formed by the yarn path of the first group of yarns from the most downstream roller in the yarn running direction of the first group of yarns in the heat preservation box to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feed roller, the upper angle is 180 ± 30 [°] (including the upper and lower limit values), and Among the two angles formed by the yarn path of the second group of yarns from the second guide roller to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feed roller, the lower angle is arranged to be 180 ± 30 [°] (including the upper and lower limit values). The mixed fiber yarn manufacturing apparatus according to claim 6, characterized in that.

11. The second guide roller, the second yarn feed roller, and the yarn combination guide are In the heat-insulating box, the yarn path of the first group of yarns from the roller on the most downstream side in the yarn running direction of the first group of yarns to the yarn combination guide, and the yarn path from the yarn combination guide to the second yarn feeding roller, among the two angles formed therebetween, the upper angle is 180 ± 30 [°] (including the upper and lower limit values), and among the two angles formed by the yarn path of the second group of yarns from the second guide roller to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feeding roller, the lower angle is arranged to be 180 ± 30 [°] (including the upper and lower limit values). The mixed fiber yarn manufacturing apparatus according to claim 7, characterized in that.

12. The second guide roller, the second yarn feeding roller, and the yarn combination guide are In the heat-insulating box, the yarn path of the first group of yarns from the roller on the most downstream side in the yarn running direction of the first group of yarns to the yarn combination guide, and the yarn path from the yarn combination guide to the second yarn feeding roller, among the two angles formed therebetween, the upper angle is 180 ± 30 [°] (including the upper and lower limit values), and among the two angles formed by the yarn path of the second group of yarns from the second guide roller to the yarn combination guide and the yarn path from the yarn combination guide to the second yarn feeding roller, the lower angle is arranged to be 180 ± 30 [°] (including the upper and lower limit values). The mixed fiber yarn manufacturing apparatus according to claim 8, characterized in that.

13. The second guide roller is arranged such that the second group of yarns guided by the second yarn feeding roller is below the first group of yarns guided by the second yarn feeding roller. The mixed fiber yarn manufacturing apparatus according to claim 5, characterized in that.

14. The second guide roller is arranged such that the second group of yarns guided by the second yarn feeding roller is below the first group of yarns guided by the second yarn feeding roller. The mixed fiber yarn manufacturing apparatus according to claim 6, characterized in that.

15. The second guide roller is arranged such that the second group of yarns guided by the second yarn feed roller is positioned below the first group of yarns guided by the second yarn feed roller. The mixed fiber yarn manufacturing apparatus according to claim 7, characterized in that.

16. The second guide roller is arranged such that the second group of yarns guided by the second yarn feed roller is positioned below the first group of yarns guided by the second yarn feed roller. The mixed fiber yarn manufacturing apparatus according to claim 8, characterized in that.

17. The second guide roller is arranged such that the second group of yarns guided by the second yarn feed roller is positioned below the first group of yarns guided by the second yarn feed roller. The mixed fiber yarn manufacturing apparatus according to claim 9, characterized in that.

18. The second guide roller is arranged such that the second group of yarns guided by the second yarn feed roller is positioned below the first group of yarns guided by the second yarn feed roller. The mixed fiber yarn manufacturing apparatus according to claim 10, characterized in that.

19. The second guide roller is arranged such that the second group of yarns guided by the second yarn feed roller is positioned below the first group of yarns guided by the second yarn feed roller. The mixed fiber yarn manufacturing apparatus according to claim 11, characterized in that.

20. The second guide roller is arranged such that the second group of yarns guided by the second yarn feed roller is positioned below the first group of yarns guided by the second yarn feed roller. The mixed fiber yarn manufacturing apparatus according to claim 12, characterized in that.

21. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 5, characterized in that.

22. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 6, characterized by the above.

23. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 7, characterized by the above.

24. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 8, characterized by the above.

25. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 9, characterized by the above.

26. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 10, characterized by the above.

27. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 11, characterized by the above.

28. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 12, characterized by the above.

29. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 13, characterized by the above.

30. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 14, characterized by the above.

31. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 15, characterized in that...

32. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 16, characterized in that...

33. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 17, characterized in that...

34. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 18, characterized in that...

35. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 19, characterized in that...

36. The first guide roller and the second guide roller are arranged vertically along the wall of the heat preservation box. The mixed fiber yarn manufacturing apparatus according to claim 20, characterized in that...

37. The first guide roller and the second guide roller are arranged outside the heat preservation box. The second group of yarns separated by the fiber separation guide are guided to the second yarn feed roller without entering the heat preservation box. The mixed fiber yarn manufacturing apparatus according to any one of claims 5 to 36, characterized in that...

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