Damn processing machine

Abstract

To secure excellent yarn quality while suppressing impairment of production efficiency and uniformity even when a thick yarn is false-twisted.SOLUTION: A false-twisting machine 1 includes: a false-twister 15 which twists a first yarn Ya and a second yarn Yb; and a cooling device 14 which cools the first yarn Ya and the second yarn Yb. The false-twister 15 has a disc 41, a first belt unit 42a, and a second belt unit 42b. The disc 41 has a first contact surface 41a and a second contact surface 41b. The first yarn Ya is twisted by the first contact surface 41a and a first endless belt 46a of the first belt unit 42a. The second yarn Yb is twisted by the second contact surface 41b and a second endless belt 46b of the second belt unit 42b. The cooling device 14 has a cooling unit 31 in which a first cooling space Sa and a second cooling space Sb are formed and an intake duct 32 for supplying cooling air to the first cooling space Sa and the second cooling space Sb.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a false twisting machine for false twisting yarn. [Background technology]

[0002] Patent Document 1 discloses a false twisting machine that false twists multiple yarns made of synthetic fibers. The false twisting machine includes a false twisting device that imparts twist to each of the multiple yarns, a cooling device arranged upstream of the false twisting device in the yarn running direction in which the multiple yarns run, and a heating device arranged upstream of the cooling device in the yarn running direction. The multiple running yarns are twisted by the multiple false twisting devices, heated and heat-set by the heating device, and then cooled by the cooling device. This fixes the crimp of the yarns and produces bulky yarns. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4462751 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for false twisting machines capable of false twisting thicker yarns than ever before. On the other hand, it is also necessary to consider the number of yarns that can be false twisted simultaneously (hereinafter referred to as production efficiency) and the suppression of the increase in yarn quality variation among multiple yarns (hereinafter referred to as uniformity).

[0005] An object of the present invention is to ensure good yarn quality while suppressing losses in production efficiency and uniformity even when false twisting thick yarns. [Means for solving the problem]

[0006] A false twisting machine of a first invention is a false twisting machine configured to simultaneously false twist at least a running first yarn and a second yarn, and includes a false twisting device configured to impart twist to the first yarn and the second yarn, and a cooling device arranged upstream of the false twisting device in the yarn running direction in which the first yarn and the second yarn run and configured to cool the first yarn and the second yarn, wherein the false twisting device includes a disk configured to rotate with a predetermined direction as its rotation axis direction, a first belt unit arranged on one side of the disk in the predetermined direction, and a second belt unit arranged on the other side of the disk in the predetermined direction, and the disk has a first contact surface arranged at an end on the one side in the predetermined direction and a second contact surface arranged at an end on the other side in the predetermined direction. the first belt unit has a first belt member that is movable while in contact with the first yarn and is configured to sandwich the first yarn between the first contact surface and the first belt member to impart a twist to the first yarn; the second belt unit has a second belt member that is movable while in contact with the second yarn and is configured to sandwich the second yarn between the second contact surface and the second belt member to impart a twist to the second yarn; and the cooling device has a cooling unit formed with a first cooling space for cooling the first yarn and a second cooling space arranged alongside the first cooling space for cooling the second yarn; and an intake duct formed with an intake space connected to the first cooling space and the second cooling space to supply cooling air to the first cooling space and the second cooling space.

[0007] In the false twisting device provided in the false twisting machine of the present invention, the first yarn is sandwiched between the first belt member and the first contact surface, and the second yarn is sandwiched between the second belt member and the second contact surface. This allows the first yarn and the second yarn to be firmly twisted. Furthermore, because the first contact surface and the second contact surface are formed on the same disk, the distance between the first yarn and the second yarn in the false twisting device can be reduced. This allows many yarns to be twisted in a small space. Furthermore, in the false twisting device, the position where the first yarn is false twisted and the position where the second yarn is false twisted can be close to each other. This prevents the yarn paths of the first yarn and the second yarn from differing significantly (and the resulting variation in yarn quality between the first yarn and the second yarn).

[0008] Furthermore, the cooling device provided in the false twisting machine of the present invention can thoroughly cool the first yarn and the second yarn with cooling air. Furthermore, since the first cooling space and the second cooling space are formed within the same cooling unit, the distance between the first yarn and the second yarn can be reduced in the cooling device. Therefore, a large number of yarns can be cooled in a small space. Furthermore, since the distance between the first yarn and the second yarn can be reduced as described above, it is possible to prevent the yarn paths of the first yarn and the second yarn from differing significantly (and the resulting variation in yarn quality described above).

[0009] In this way, even when false twisting a thick yarn, it is possible to ensure good yarn quality while suppressing a loss of production efficiency and uniformity.

[0010] The false twisting machine of the second invention is the false twisting machine of the first invention, characterized in that the first cooling space and the second cooling space are arranged side by side in the predetermined direction.

[0011] In the present invention, when the first yarn and the second yarn are fed from the cooling device to the false twisting device, the first yarn and the second yarn can be maintained aligned in a predetermined direction. This further prevents the yarn paths of the first yarn and the second yarn from differing from each other, compared to when, for example, the first cooling space and the second cooling space are aligned in a direction different from the predetermined direction. Therefore, it is possible to effectively reduce variations in yarn quality between the first yarn and the second yarn.

[0012] The false twisting machine of the third invention is characterized in that, in the second invention, when a distance in a predetermined direction between an upstream end of the first cooling space in the yarn running direction and an upstream end of the second cooling space in the yarn running direction is defined as WC1, and a distance in a predetermined direction between a downstream end of the first cooling space in the yarn running direction and a downstream end of the second cooling space in the yarn running direction is defined as WC2, WC2≦WC1.

[0013] In the present invention, since WC2 is small, bending of the first yarn and the second yarn can be suppressed when the first yarn and the second yarn are fed from the cooling device to the false twisting device, thereby suppressing deterioration of yarn quality.

[0014] The false twisting machine of a fourth invention is the false twisting machine of the second or third invention, further comprising: an upstream guide member arranged upstream of the cooling device in the yarn running direction; and a downstream guide member arranged downstream of the cooling device in the yarn running direction, wherein the upstream guide member is configured to set a distance W1 between the first yarn and the second yarn in the predetermined direction; the downstream guide member is configured to set a distance W2 between the first yarn and the second yarn in the predetermined direction; and wherein, when the distance WC1 in the predetermined direction between the upstream end of the first cooling space in the yarn running direction and the upstream end of the second cooling space in the yarn running direction is set as WC2, W2≦WC2≦WC1≦W1 or W1≦WC1≦WC2≦W2 holds.

[0015] In the present invention, when threading the first yarn and the second yarn onto the cooling unit, the threading can be performed while maintaining both the first yarn and the second yarn in a substantially straight line. In other words, when threading the first yarn and the second yarn onto the cooling unit, there is almost no need to bend the first yarn and the second yarn. Therefore, it is easy to thread the first yarn and the second yarn onto the cooling unit simultaneously.

[0016] The false twisting machine of the fifth invention is characterized in that, in any one of the second to fourth inventions, the cooling unit has a partition member that separates the first cooling space and the second cooling space in a predetermined direction.

[0017] The first cooling space and the second cooling space do not necessarily have to be separated, but in this case, there is a risk that the first yarn and the second yarn may become entangled with each other for some reason. In the present invention, the first cooling space and the second cooling space are separated by a partition member, so the occurrence of such a problem can be reliably avoided.

[0018] The false twisting machine of the sixth invention is characterized in that, in the fifth invention, the intake space extends in the predetermined direction, and the first cooling space and the second cooling space are each connected to the intake space.

[0019] In the present invention, the first cooling space and the second cooling space are each connected to an intake space extending in a predetermined direction (i.e., connected in parallel), so that cooling air can be supplied to the first cooling space and the second cooling space approximately uniformly with a simple structure.

[0020] The false twisting machine of the seventh invention is characterized in that, in the fifth or sixth invention, the partition member comprises a first partition section having a first partition surface arranged on one side in the predetermined direction to form the first cooling space, and a second partition section having a second partition surface arranged on the other side in the predetermined direction to form the second cooling space, and the cooling unit comprises a first wall member having a first wall surface for forming the first cooling space, arranged on one side of the first partition surface in the predetermined direction, and a second wall member having a second wall surface for forming the second cooling space, arranged on the other side of the second partition surface in the predetermined direction.

[0021] In the present invention, a first cooling space is formed by the first partitioning surface of the partition member and the first wall surface of the first wall member. Also, a second cooling space is formed by the second partitioning surface of the partition member and the second wall surface of the second wall member. Therefore, the first cooling space and the second cooling space can be formed with a simple structure.

[0022] The false twisting machine of the eighth invention is characterized in that, in the seventh invention, the first partition surface is arranged to face the first wall surface in the specified direction, and the second partition surface is arranged to face the second wall surface in the specified direction.

[0023] For example, when the first yarn is twisted by the false twisting device and comes into contact with a wall surface forming the first cooling space, the first yarn may roll along the wall surface and fall out of the first cooling space. This possibility increases particularly when the entrance for introducing the first yarn into the first cooling space is wide. The same applies to the second cooling space. In the present invention, the first partition surface is arranged to face the first wall surface in a predetermined direction (i.e., the two surfaces are approximately parallel to each other). This allows the entrance of the first cooling space to be narrowed. The same applies to the second cooling space. Therefore, it is possible to prevent the first yarn from falling out of the first cooling space and the second yarn from falling out of the second cooling space.

[0024] The false twisting machine of the ninth invention is the seventh or eighth invention, characterized in that the cooling unit has a first yarn guide arranged between the first partition surface and the first wall surface in the predetermined direction, and guiding the first yarn downstream in the yarn traveling direction, and a second yarn guide arranged between the second partition surface and the second wall surface in the predetermined direction, and guiding the second yarn downstream in the yarn traveling direction.

[0025] The cooling unit may be configured to cool the yarn using, for example, cooling air and wall surfaces and partition surfaces cooled by the cooling air. However, such a configuration that actively brings the yarn into contact with the wall surfaces and partition surfaces makes the yarn more likely to roll along the wall surfaces or partition surfaces when twisted by the false twist device. This increases the likelihood that the yarn will fall out of the cooling space. In this regard, in the present invention, the first yarn is guided downstream in the yarn traveling direction by the first yarn guide, and the second yarn is guided downstream in the yarn traveling direction by the second yarn guide. In other words, the cooling unit is not configured to actively bring the yarn into contact with the partition surfaces and wall surfaces. Therefore, the occurrence of the above-mentioned problems can be suppressed.

[0026] The false twisting machine of the 10th invention is characterized in that, in any one of the 7th to 9th inventions, the first wall member and the second wall member are attached to the intake duct, and at least one of the first wall member and the second wall member is configured to support the partition member.

[0027] The cooling unit can be designed so that the smaller the partition member in the predetermined direction, the shorter the distance between the first cooling space and the second cooling space in the predetermined direction. In other words, the spacing between the first thread and the second thread can be narrowed. However, if the partition member is very small in the predetermined direction, it may not be possible to attach the partition member to the intake duct (e.g., by screwing). In the present invention, the partition member can be supported by at least one of the first wall member and the second wall member. Therefore, even if the partition member cannot be attached to the intake duct, the partition member can be positioned correctly.

[0028] The false twisting machine of an eleventh invention is the false twisting machine of the tenth invention, characterized in that both the first wall member and the second wall member are configured to support the partition member.

[0029] In the present invention, the partition member is supported at both ends by the first wall member and the second wall member, and therefore the partition member can be stably supported.

[0030] The false twisting machine of the 12th invention is characterized in that, in any one of the seventh to eleventh inventions, at least the partition member is configured to be movable relative to the first wall member and the second wall member.

[0031] Generally, yarns to be false twisted are treated with an oil to ensure smooth yarn running. If such an oil adheres to the cooling unit, the cooling unit will become dirty, and therefore the components constituting the cooling unit must be cleaned appropriately. In the present invention, at least the partition member is configured to be movable relative to the first wall member and the second wall member. "Relatively movable" also includes, for example, the first wall member and the second wall member being movable relative to the partition member. This ensures a large space for cleaning these components. Therefore, the efficiency of cleaning and other tasks can be improved.

[0032] The false twisting machine of the 13th invention is characterized in that, in the 12th invention, one of the first wall member and the second wall member is fixed in position relative to the intake duct, and the other of the first wall member and the second wall member and the partition member are movable relative to the one of the first wall member and the second wall member.

[0033] For convenience of explanation, one of the first wall member and the second wall member is referred to as the fixed wall member. In the present invention, another cooling unit configured to be symmetrical to the cooling unit, with a line generally parallel to the longitudinal direction of the cooling unit as the axis of symmetry, can be provided near the fixed wall member. Even if such another cooling unit is provided, the two adjacent fixed wall members do not move. Therefore, interference between the members can be avoided when the members are moved during cleaning.

[0034] The false twisting machine of a fourteenth invention is the twelfth or thirteenth invention, characterized in that the partition member is configured to be detachable from the cooling unit.

[0035] In the present invention, the partition member can be completely separated from the cooling unit, which greatly improves the efficiency of cleaning and other operations.

[0036] The false twisting machine of the 15th invention is characterized in that, in any of the 7th to 14th inventions, when a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, the partition member has a first yarn insertion guide portion that protrudes, at least in the height direction, further than the first partition portion toward the work space where the yarn threading operation into the cooling device is performed, and a second yarn insertion guide portion that protrudes, at least in the height direction, further than the second partition portion toward the work space.

[0037] In the present invention, during threading, the first thread can be moved along the first thread insertion guide portion, and the second thread can be moved along the second thread insertion guide portion, thereby increasing the success rate of the threading operation.

[0038] The false twisting machine of the 16th invention is the 15th invention, further comprising a heating device arranged upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn, the false twisting device, the cooling device and the heating device being arranged above the work space, and the upstream end of the heating device in the yarn running direction being arranged vertically farther above the cooling device than the downstream end of the heating device in the yarn running direction.

[0039] In the present invention, the upstream end of the heating device in the yarn running direction is positioned at a high vertical position, making it difficult for an operator to manually thread the yarn onto the heating device. In such cases, the yarn is generally first threaded onto the false twist device, and then the yarn is threaded onto the cooling device and heating device at the same time using a device for moving the yarn upward (e.g., an air injection device). When performing such threading operations, it is particularly effective to use the first yarn insertion guide unit and the second yarn insertion guide unit to increase the success rate of threading. [Brief explanation of the drawings]

[0040] [Figure 1] 1 is a side view of a false twisting machine according to an embodiment of the present invention. [Figure 2] FIG. 1 is a schematic diagram showing a false twisting machine laid out along the yarn path. [Figure 3] FIG. 3 is a view taken along the arrow III in FIG. [Figure 4] 4 is an enlarged view of a part of FIG. 3, showing the upstream end of the cooling device in the yarn traveling direction and its vicinity. [Figure 5] 4 is an enlarged view of a part of FIG. 3, showing the downstream end of the cooling device in the yarn traveling direction and its vicinity. [Figure 6] FIG. 4 is an enlarged view of a portion of FIG. 3 showing the false twist device. [Figure 7] FIG. [Figure 8] FIG. 2 is a diagram roughly illustrating components that constitute a cooling unit. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8. [Figure 10] FIG. 10 is an explanatory diagram showing a state in which the partition member is removed from the cooling unit. [Figure 11] FIG. 2 is a further schematic diagram of the cooling unit. [Figure 12] FIG. 10 is an explanatory diagram showing a cooling unit according to a modified example. [Figure 13] FIG. 10 is an explanatory diagram showing a cooling unit according to another modified example. DETAILED DESCRIPTION OF THE INVENTION

[0041] Next, an embodiment of the present invention will be described. The direction perpendicular to the plane of the paper in Fig. 1 is the machine base longitudinal direction (the predetermined direction of the present invention). For convenience of explanation, the front side of the plane of Fig. 1 and the left side of the plane of Fig. 2 are defined as one side in the machine base longitudinal direction, and the back side of the plane of Fig. 1 and the right side of the plane of Fig. 2 are defined as the other side in the machine base longitudinal direction. The left-right direction of the plane of Fig. 1 is defined as the machine base width direction. The direction perpendicular to both the machine base longitudinal direction and the machine base width direction is defined as the up-down direction (vertical direction) in which gravity acts. The direction in which multiple yarns Y (described below) run side by side is defined as the yarn running direction.

[0042] (Overall configuration of false twisting machine) First, the overall configuration of a false twisting machine 1 of this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a side view of the false twisting machine 1. Figure 2 is a schematic view of the false twisting machine 1 unfolded along the path (yarn path) of the yarn Y.

[0043] The false twisting machine 1 is configured to simultaneously false-twist multiple yarns Y made of synthetic fibers (e.g., polyester). Each of the multiple yarns Y is, for example, a multifilament yarn made of multiple filaments. Alternatively, each yarn Y may be made of a single filament. The false twisting machine 1 includes a yarn supplying unit 2, a processing unit 3, and a winding unit 4. The yarn supplying unit 2 is configured to supply multiple yarns Y. The processing unit 3 is configured to pull out the multiple yarns Y from the yarn supplying unit 2 and false-twist the multiple yarns Y. The winding unit 4 is configured to wind the multiple yarns Y processed by the processing unit 3 onto a winding bobbin Bw. Each of the components of the yarn supplying unit 2, the processing unit 3, and the winding unit 4 is arranged in multiple rows in the longitudinal direction of the machine frame (see FIG. 2). The longitudinal direction of the machine frame is a direction perpendicular to the running plane of the yarn Y (the plane of the paper in FIG. 1) formed by the yarn path from the yarn supplying unit 2 through the processing unit 3 to the winding unit 4.

[0044] The yarn supplying section 2 has a creel stand 7 that holds multiple yarn supply packages Ps and supplies multiple yarns Y to the processing section 3. The processing section 3 is configured to pull out multiple yarns Y from the yarn supplying section 2 and process them. The processing section 3 is configured to include, in order from the upstream side in the yarn running direction, a first feed roller 11, a twist stop guide 12, a first heating device 13 (the heating device of the present invention), a cooling device 14, a false twist device 15, a second feed roller 16, a doubling device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20. The winding section 4 has multiple winding devices 21. Each winding device 21 winds the yarn Y that has been false twisted in the processing section 3 onto one or more winding bobbins Bw to form one or more winding packages Pw.

[0045] The false twisting machine 1 has a main frame 8 and a winding table 9 that are spaced apart in the width direction of the machine. The main frame 8 and the winding table 9 are arranged so that they extend over approximately the same length in the longitudinal direction of the machine. The main frame 8 and the winding table 9 are arranged so that they face each other in the width direction of the machine. A work space Sw is formed between the main frame 8 and the winding table 9, where an operator can perform tasks such as threading (see FIG. 1). The false twisting machine 1 has a unit called a span, which includes a pair of the main frame 8 and the winding table 9. In one span, various devices are arranged so that multiple yarns Y running side by side in the longitudinal direction of the machine can be false twisted simultaneously. In the false twisting machine 1, these spans are arranged symmetrically on the left and right sides of the drawing, with the center line C of the main frame 8 in the width direction as the axis of symmetry (the main frame 8 is common to both the left and right spans). In addition, multiple spans are arranged in the longitudinal direction of the machine.

[0046] (Configuration of processing part) The configuration of the processing unit 3 will be described with reference to Figures 1 and 2. The first feed roller 11 is configured to unwind the yarn Y from the yarn supply package Ps attached to the yarn supplying unit 2 and feed it to the first heating device 13. For example, as shown in Figure 2, the first feed roller 11 is configured to be able to feed two strands of yarn Y to the first heating device 13, but is not limited to this. The twist stop guide 12 is configured to prevent the twist imparted to the yarn Y by the false twist device 15 from propagating upstream of the twist stop guide 12 in the yarn running direction.

[0047] The first heating device 13 is configured to heat the yarn Y fed from the first feed roller 11. The first heating device 13 is disposed obliquely so that its upstream end in the yarn traveling direction is located higher than its downstream end (see FIG. 1). In other words, the upstream end of the first heating device 13 in the yarn traveling direction is disposed farther above the cooling device 14 in the up-down direction (vertical direction) than the downstream end of the first heating device 13 in the yarn traveling direction. The first heating device 13 is configured to be able to heat, for example, four yarns Y as shown in FIG. 2, but is not limited to this.

[0048] The cooling device 14 is configured to cool the yarn Y heated by the first heating device 13. Details of the cooling device 14 will be described later. The false twist device 15 is disposed downstream of the cooling device 14 in the yarn running direction, and is configured to impart twist to two yarns Y (first yarn Ya and second yarn Yb). Details of the false twist device 15 will be described later.

[0049] The second feed rollers 16 are configured to feed the yarn Y processed by the false twist device 15 to the yarn doubling device 17. The conveying speed of the yarn Y by the second feed rollers 16 is faster than the conveying speed of the yarn Y by the first feed rollers 11. As a result, the yarn Y is stretched between the first feed rollers 11 and the second feed rollers 16.

[0050] The doubling device 17 is configured to doubling the first yarn Ya and the second yarn Yb to form the yarn Yc. The doubling device 17 has two interlace nozzles 17a and 17b (see FIG. 2). The doubling device 17, for example, sprays air onto the first yarn Ya and the second yarn Yb passing through the interlace nozzle 17a (see the left side of FIG. 2), and interlaces the first yarn Ya and the second yarn Yb with an air flow to doubling them and form the yarn Yc. The doubling device 17 can also guide the first yarn Ya and the second yarn Yb downstream in the yarn running direction without doubling them. In this case, the first yarn Ya passes through the interlace nozzle 17a, and the second yarn Yb passes through the interlace nozzle 17b (see the right side of FIG. 2). Note that instead of the doubling device 17 having the interlace nozzles 17a and 17b, a doubling unit (not shown) having, for example, guides or feed rollers not shown may be provided. The doubling unit may doubling two yarns Y using these guides or feed rollers, or may guide the two yarns Y directly downstream in the yarn running direction without doubling them.

[0051] The third feed roller 18 is configured to feed the yarn Y traveling downstream of the doubling device 17 in the yarn traveling direction to the second heating device 19. The third feed roller 18 is configured to be able to feed two strands of yarn Y to the second heating device 19, as shown in FIG. 2 , for example, but is not limited to this. The speed at which the third feed roller 18 conveys the yarn Y is slower than the speed at which the second feed roller 16 conveys the yarn Y. Therefore, the yarn Y is relaxed between the second feed roller 16 and the third feed roller 18. The second heating device 19 is configured to heat the yarn Y fed from the third feed roller 18. The second heating device 19 extends vertically, with one second heating device 19 provided per span. The fourth feed roller 20 is configured to feed the yarn Y heated by the second heating device 19 to the winding device 21. The fourth feed roller 20 is configured to be able to feed two strands of yarn Y to the winding device 21, as shown in FIG. 2, for example, but is not limited to this. The speed at which the yarn Y is conveyed by the fourth feed roller 20 is slower than the speed at which the yarn Y is conveyed by the third feed roller 18. Therefore, the yarn Y is relaxed between the third feed roller 18 and the fourth feed roller 20.

[0052] In the processing unit 3 configured as described above, the yarn Y drawn between the first feed roller 11 and the second feed roller 16 is twisted by the false twist device 15. The twist formed by the false twist device 15 propagates to the twist stop guide 12 but does not propagate upstream of the twist stop guide 12 in the yarn traveling direction. The yarn Y, which has been drawn and twisted, is heated and heat-set by the first heating device 13 and then cooled by the cooling device 14. The yarn Y is untwisted downstream of the false twist device 15 in the yarn traveling direction, but the heat-set maintains the wavy false-twisted state of the yarn Y. The two false-twisted yarns Y (the first yarn Ya and the second yarn Yb) are relaxed between the second feed roller 16 and the third feed roller 18 and then doubling by the doubling device 17, or are guided downstream in the yarn traveling direction without being doubling. Furthermore, the yarn Y is heat-treated in the second heating device 19 while being relaxed between the third feed roller 18 and the fourth feed roller 20. Finally, the yarn Y (the yarn Yc, or the first yarn Ya and the second yarn Yb) fed from the fourth feed roller 20 is wound by the winding device 21. As a result, one or two winding packages Pw are formed in each winding device 21.

[0053] (Configuration of winding section) The configuration of the winding unit 4 will be described with reference to FIG. 2. The winding unit 4 has a plurality of winding devices 21. Each winding device 21 is configured to be able to wind the yarn Y onto, for example, one or two winding bobbins Bw. The winding device 21 has a fulcrum guide 22, a traverse device 23, and a cradle 24. The fulcrum guide 22 is a guide that serves as a fulcrum when the yarn Y is traversed. For example, three fulcrum guides 22 are provided for each winding device 21 (see FIG. 2). For example, when guiding a single yarn Yc that has been combined by the yarn doubling device 17, the yarn Y is hooked on the central fulcrum guide 22 of the three fulcrum guides (see the left side of FIG. 2). When guiding two yarns Y that have been fed without being combined, the yarn Y is hooked on the two fulcrum guides 22 at both ends of the three fulcrum guides 22 (see the right side of FIG. 2). The traverse device 23 is configured to traverse the yarn Y using traverse guides 25. The number of traverse guides 25 can be changed depending on the number of yarns Y to be traversed. The cradle 24 is configured to rotatably support one or two winding bobbins Bw. A contact roller 26 is disposed near the cradle 24. The contact roller 26 contacts the surface of one or two winding packages Pw to apply contact pressure. In the winding section 4 configured as above, the yarn Y fed from the fourth feed roller 20 is wound onto one or two winding bobbins Bw by each winding device 21 to form one or two winding packages Pw. Note that the configuration of the winding device 21 is not limited to the above. The winding device 21 may be configured to simultaneously form, for example, three or more winding packages Pw. Alternatively, the winding section 4 may have winding devices (not shown) in the same number as the number of yarns Y supplied from the yarn supplying section 2. Each of the winding devices may be configured to be able to wind one yarn Y.

[0054] In recent years, there has been a demand for false twisting of thicker yarns Y than ever before. On the other hand, it is also necessary to take into consideration the number of yarns Y that can be false twisted simultaneously (hereinafter referred to as production efficiency) and the suppression of an increase in yarn quality variation among multiple yarns Y (hereinafter referred to as uniformity). Therefore, in this embodiment, even when false twisting a thick yarn Y, in order to ensure good yarn quality while suppressing a loss of production efficiency and uniformity, the processing unit 3 has the following configuration.

[0055] (More detailed configuration of the processing part) Next, the configuration of the processing unit 3 will be described in more detail. First, a more detailed layout of the first heating device 13, the cooling device 14, and the false twist device 15 and their vicinity will be described with reference to Figs. 3 to 5. Fig. 3 is a view seen from the arrow III in Fig. 1. Fig. 4 is an enlarged view of a portion of Fig. 3, showing the upstream end of the cooling device 14 in the yarn running direction and its vicinity. Fig. 5 is an enlarged view of a portion of Fig. 3, showing the downstream end of the cooling device 14 in the yarn running direction and its vicinity. In this embodiment, the first heating device 13, the cooling device 14, and the false twist device 15 are arranged above the working space Sw.

[0056] As shown in FIG. 3, the multiple first heating devices 13 are arranged side by side in the longitudinal direction of the machine base. Each of the multiple first heating devices 13 is configured to simultaneously heat, for example, four yarns Y running side by side in the longitudinal direction of the machine base. In the yarn running direction, a yarn guide G1 (see FIG. 4; upstream guide member of the present invention) is provided between the first heating device 13 and the cooling device 14 (i.e., upstream of the cooling device 14 in the yarn running direction). The yarn guide G1 is configured to guide the four yarns Y downstream in the yarn running direction. The pitch (interval W1; see FIG. 4) of the four yarns Y guided by the yarn guide G1 in the longitudinal direction of the machine base is set to, for example, 14 mm. However, the size of the interval W1 is not limited to this.

[0057] The cooling device 14 is a non-contact device that cools the plurality of yarns Y with cooling air (details will be described later). As shown in FIG. 3, the cooling device 14 has a plurality of cooling units 31 and an air intake duct 32 connected to the plurality of cooling units 31. The cooling device 14 supplies cooling air to a plurality of cooling spaces S (see FIGS. 4 and 5) formed in each of the plurality of cooling units 31 by a suction device (not shown) that sucks gas from inside the air intake duct 32. The plurality of yarns Y are cooled by this cooling air.

[0058] The cooling units 31 are arranged side by side in the longitudinal direction of the machine base. The cooling units 31 are attached to an air intake duct 32. Each of the cooling units 31 extends in a direction intersecting (approximately perpendicular to) the longitudinal direction of the machine base. Each cooling unit 31 may extend in a substantially linear manner, but is not limited thereto (for example, it may be curved). Each cooling unit 31 is configured to cool two yarns Y (a first yarn Ya and a second yarn Yb). Each cooling unit 31 is formed with a first cooling space Sa for cooling the first yarn Ya and a second cooling space Sb for cooling the second yarn Yb (see FIGS. 4 and 5). The cooling units 31 include two cooling units 31A and 31B arranged adjacent to each other in the longitudinal direction of the machine base. The two cooling units 31A and 31B are provided corresponding to one first heating device 13. The distance between the cooling units 31A and 31B in the machine longitudinal direction increases, for example, toward the downstream side in the yarn running direction. The two cooling units 31A and 31B are configured to be line-symmetrical with respect to a predetermined straight line L (see FIG. 3) as the axis of symmetry. The cooling unit 31 will be described in more detail later.

[0059] The intake duct 32 is a duct configured to supply cooling air to the multiple cooling units 31. The intake duct 32 extends in the longitudinal direction of the machine base. An intake space Ss extending in the longitudinal direction of the machine base is formed inside the intake duct 32. The intake space Ss is connected to the cooling space S (see Figures 4 and 5). The multiple cooling units 31 are attached to the intake duct 32.

[0060] As shown in FIG. 3, the multiple false twist devices 15 are arranged side by side in the longitudinal direction of the machine. Each of the multiple false twist devices 15 is configured to simultaneously heat two yarns Y (first yarn Ya and second yarn Yb) running side by side in the longitudinal direction of the machine. In the yarn running direction, a yarn guide G2 (see FIG. 5; downstream guide member of the present invention) is provided between the cooling device 14 and the false twist device 15 (i.e., downstream of the cooling device 14 in the yarn running direction). The yarn guide G2 is configured to guide the two yarns Y downstream in the yarn running direction. The distance W2 (see FIG. 5) between the two yarns Y guided by the yarn guide G2 in the longitudinal direction of the machine is set to, for example, 8 mm. However, the size of the distance W2 is not limited to this.

[0061] (Detailed configuration of false twisting device) Next, the detailed configuration of the false twist device 15 will be described with reference to Fig. 6 and Fig. 7. Fig. 6 is an enlarged view of a portion of Fig. 3 showing the false twist device 15. Fig. 7 is a view of the false twist device 15 as seen from one side in the machine longitudinal direction.

[0062] The false twist device 15 is a known false twist device, for example, as described in Japanese Patent Application Laid-Open No. 2018-127731. As shown in FIG. 6, the false twist device 15 includes a disk 41 and two belt units 42 (a first belt unit 42a and a second belt unit 42b). The false twist device 15 is configured to sandwich a first yarn Ya between a first contact surface 41a (described below) of the disk 41 and a first endless belt 46a (described below) of the first belt unit 42a, thereby imparting a twist to the first yarn Ya. The false twist device 15 is also configured to sandwich a second yarn Yb between a second contact surface 41b (described below) of the disk 41 and a second endless belt 46b (described below) of the second belt unit 42b, thereby imparting a twist to the second yarn Yb.

[0063] The disks 41 are members configured to rotate with the longitudinal direction of the machine frame as the rotation axis direction. The disks 41 are fixed to, for example, a common rotation shaft 43 extending in the longitudinal direction of the machine frame. The common rotation shaft 43 is configured to connect multiple disks 41 provided in multiple false twist devices 15, respectively. The common rotation shaft 43 is driven to rotate by, for example, a motor (not shown). This causes the disks 41 to rotate. A first contact surface 41a with which the first yarn Ya comes into contact is formed on one end surface of the disk 41 in the longitudinal direction of the machine frame. A second contact surface 41b with which the second yarn Yb comes into contact is formed on the other end surface of the disk 41 in the longitudinal direction of the machine frame.

[0064] The first belt unit 42a is disposed on one side of the disk 41 in the machine base longitudinal direction. The first belt unit 42a includes a first drive pulley 44a, a first driven pulley 45a, and a first endless belt 46a (first belt member of the present invention). The first endless belt 46a is wound around the first drive pulley 44a and the first driven pulley 45a. The first thread Ya is disposed so as to be sandwiched between the first endless belt 46a and the first contact surface 41a. The rotation axes of the first drive pulley 44a and the first driven pulley 45a extend in a direction substantially perpendicular to the machine base longitudinal direction. The rotation axes of the first drive pulley 44a and the first driven pulley 45a are substantially parallel to each other. The first drive pulley 44a and the first driven pulley 45a are disposed side by side in a direction substantially perpendicular to the common rotation axis 43.

[0065] The second belt unit 42b is disposed on the other side of the disk 41 in the machine frame longitudinal direction. The second belt unit 42b includes a second driving pulley 44b, a second driven pulley 45b, and a second endless belt 46b (second belt member of the present invention). The second endless belt 46b is wound around the second driving pulley 44b and the second driven pulley 45b. The second thread Yb is disposed so as to be sandwiched between the second endless belt 46b and the second contact surface 41b. The rotation axes of the second driving pulley 44b and the second driven pulley 45b extend in a direction substantially parallel to the rotation axes of the first driving pulley 44a and the first driven pulley 45a. The second driving pulley 44b and the second driven pulley 45b are disposed side by side in a direction substantially perpendicular to the common rotation axis 43.

[0066] The first drive pulley 44a and the second drive pulley 44b are rotationally driven by a drive unit 47 (see FIG. 7). The drive unit 47 is configured to rotate the first drive pulley 44a and the second drive pulley 44b in opposite directions. The drive unit 47 has a drive source (e.g., a motor) (not shown), a first power transmission member (not shown) that transmits the power of the drive source to the first drive pulley 44a, and a second power transmission member (not shown) that transmits the power of the drive source to the second drive pulley 44b.

[0067] When viewed from the longitudinal direction of the machine, the first belt unit 42a and the second belt unit 42b are arranged so as to substantially overlap each other, so that when viewed from the longitudinal direction of the machine, the yarn paths of the first yarn Ya and the second yarn Yb in the false twist device 15 substantially overlap each other (see FIG. 7).

[0068] In the false twist device 15 configured as described above, a twist is imparted to the first yarn Ya by the first endless belt 46a and the first contact surface 41a. A twist is imparted to the second yarn Yb by the second endless belt 46b and the second contact surface 41b. In this manner, a twist is imparted to the two yarns Y simultaneously. The first yarn Ya and the second yarn Yb are twisted in opposite directions. For example, a Z twist is imparted to the first yarn Ya, and an S twist is imparted to the second yarn Yb.

[0069] (Detailed configuration of the cooling device) Next, further details of the cooling device 14 will be described mainly with reference to FIGS. 8 to 11. FIG. 8 is a diagram roughly illustrating the components constituting the cooling unit 31 (cooling unit 31A), and is a diagram of the cooling unit 31A viewed from the same direction as FIG. 3. That is, FIG. 8 is a diagram of the cooling unit 31A viewed generally from below. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8. FIG. 10 is an explanatory diagram showing a state in which a partition member 53, which will be described later, has been removed from the cooling unit 31A. FIG. 11 is a further schematic diagram of the cooling unit 31A to make the cooling space S easier to see. As described above, the cooling units 31A and 31B are configured to be symmetrical with respect to each other (see FIG. 3). Therefore, hereinafter, the cooling unit 31A will be mainly described in detail, and the cooling unit 31B will be briefly described.

[0070] The direction perpendicular to the plane of the paper in FIG. 8 is the height direction. The height direction is parallel to the up-down direction of the plane of the paper in FIGS. 9 and 10. The height direction is a direction perpendicular to the longitudinal direction of the machine. In this embodiment, the height direction has at least a vertical component. In this embodiment, one side in the height direction can be roughly referred to as the upper side. In addition, the other side in the height direction can be roughly referred to as the lower side. However, it should be noted that the relationship between the height direction and the up-down direction may change depending on the orientation of the cooling device 14. For convenience of explanation, the direction perpendicular to both the longitudinal direction of the machine and the height direction is referred to as the orthogonal direction. The cooling units 31A and 31B extend at least in the orthogonal direction. In the orthogonal direction, the side closer to the first heating device 13 is referred to as one side, and the side closer to the false twist device 15 is referred to as the other side. In this embodiment, the cooling units 31A and 31B each extend in a direction slightly inclined from the orthogonal direction.

[0071] As shown in FIGS. 8 to 11, the cooling unit 31A has a fixed wall plate 51 (second wall member of the present invention), a movable wall plate 52 (first wall member of the present invention), and a partition member 53. The fixed wall plate 51 corresponds to "one of the first wall member and the second wall member" of the present invention. The movable wall plate 52 corresponds to "the other of the first wall member and the second wall member" of the present invention. The fixed wall plate 51, the movable wall plate 52, and the partition member 53 are long members for forming two cooling spaces S (first cooling space Sa and second cooling space Sb). As shown in FIG. 8, the fixed wall plate 51, the movable wall plate 52, and the partition member 53 extend long in a direction perpendicular to the height direction and intersecting the longitudinal direction of the machine base. In the cooling unit 31A, the movable wall plate 52, the partition member 53, and the fixed wall plate 51 are arranged side by side in this order from one side in the longitudinal direction of the machine base. That is, the movable wall plate 52 is disposed on the furthest side in the longitudinal direction of the machine base. The partition member 53 is disposed on the other side of the movable wall plate 52 in the longitudinal direction of the machine base and adjacent to the movable wall plate 52. The fixed wall plate 51 is disposed on the other side of the partition member 53 in the longitudinal direction of the machine base and adjacent to the partition member 53. In the cooling unit 31B, these members are arranged in the reverse order in the longitudinal direction of the machine base (see the fixed wall plate 56, the movable wall plate 57, and the partition member 58 in FIG. 4).

[0072] Next, the fixed wall plate 51 will be described in more detail. As shown in Figures 9 and 10, the fixed wall plate 51 is a member having a substantially C-shaped cross section. That is, the fixed wall plate 51 has a base end portion 61, an intermediate portion 62, and a tip end portion 63 in the cross section shown in Figures 9 and 10.

[0073] The base end 61 is located at one end of the fixed wall plate 51 in the height direction and extends in the longitudinal direction of the machine frame. The base end 61 is fixed to the air intake duct 32, for example, by screws (not shown). More specifically, a wall portion 33 extending in the longitudinal direction of the machine frame is formed at the other end of the air intake duct 32 in the height direction. The base end 61 is screwed to the wall portion 33. The intermediate portion 62 is a portion extending from one end of the base end 61 in the longitudinal direction of the machine frame to the other side in the height direction. A wall surface 64 (a second wall surface of the present invention) extending in the height direction is formed on one side of the intermediate portion 62 in the longitudinal direction of the machine frame. The wall surface 64 is a surface for forming a second cooling space Sb in the cooling unit 31A. A plurality of contact bodies 65 (see FIGS. 10 and 11) are provided on the wall surface 64 and are spaced apart from each other in the yarn running direction. The contact body 65 is configured to actively bring the running yarn Y (here, the second yarn Yb) into contact with the contact body 65. This prevents the second yarn Yb from unintentionally contacting a portion of the wall surface 64 where the contact body 65 is not provided. The intermediate portion 62 is also formed with a plurality of through holes 66 that penetrate in the longitudinal direction of the machine base (see FIGS. 9 and 10). The through holes 66 are positioning holes through which positioning pins 97b, which will be described later, are inserted. The tip portion 63 is a portion that extends from the other end of the intermediate portion 62 in the height direction to the other side in the longitudinal direction of the machine base.

[0074] Next, the movable wall plate 52 will be described in more detail. As shown in Figures 9 and 10, the movable wall plate 52 is a member having a substantially C-shaped cross section that faces in the opposite direction to the fixed wall plate 51. That is, the movable wall plate 52 has a base end portion 71, an intermediate portion 72, and a tip end portion 73 in the cross section shown in Figures 9 and 10.

[0075] The base end 71 is located at one end of the movable wall plate 52 in the height direction and extends in the longitudinal direction of the machine frame. The intermediate portion 72 extends from the other end of the base end 71 in the longitudinal direction of the machine frame to the other side in the height direction. A wall surface 74 (first wall surface of the present invention) extending in the height direction is formed on the other side of the intermediate portion 72 in the longitudinal direction of the machine frame. The wall surface 74 is a surface for forming a first cooling space Sa in the cooling unit 31A. The wall surface 74 is provided with a plurality of contact bodies 75 (see FIGS. 10 and 11) spaced apart from each other in the yarn running direction. The contact bodies 75 are configured to actively bring the running first yarn Ya into contact with the contact bodies 75. This prevents the first yarn Ya from unintentionally contacting portions of the wall surface 74 where the contact bodies 75 are not provided. The intermediate portion 72 also has a plurality of through holes 76 penetrating in the longitudinal direction of the machine frame (see FIGS. 9 and 10). The through hole 76 is a positioning hole through which a positioning pin 97a (described later) is inserted. The tip portion 73 is a portion that extends from the other end of the intermediate portion 72 in the height direction to one side in the machine base longitudinal direction.

[0076] The movable wall plate 52 is attached to, for example, a plurality of spring units 54 (see Figures 4, 5, 9 and 10). This allows the movable wall plate 52 to move at least in the longitudinal direction of the machine frame relative to the fixed wall plate 51. The movable wall plate 52 is movable between an operating position (see solid lines in Figures 4 and 5 and Figure 9) and a detached position (see dashed double-dashed lines in Figures 4 and 5 and Figure 10). The operating position is the position of the movable wall plate 52 when the false twisting machine 1 is operating. The detached position is the position of the movable wall plate 52 when the partition member 53 is detached from the cooling unit 31A (details will be described later). In the cooling unit 31A, the spring unit 54 is provided on one side of the movable wall plate 52 in the longitudinal direction of the machine frame. In the cooling unit 31B, a spring unit 59 (see Figure 4) having a configuration similar to the spring unit 54 is provided on the other side of the movable wall plate 57 in the longitudinal direction of the machine frame.

[0077] The configuration of the spring unit 54 will be described in detail with reference to FIGS. 4, 9, and 10. The spring unit 54 is a force application unit for applying a force to the movable wall plate 52 toward the fixed wall plate 51. As shown in FIG. 4, for example, the spring unit 54 has a torsion spring 81, a fixed member 82, and a restricting pin 83. The torsion spring 81 has a coil portion (not shown), a fixed arm 84 provided at one end of the coil portion, and a movable arm 85 provided at the other end of the coil portion. The coil portion is fixed to the intake duct 32 by the fixed member 82. The movement of the fixed arm 84 is restricted by the restricting pin 83 fixed to the intake duct 32. The movable arm 85 is attached to the movable wall plate 52, for example, and supports the movable wall plate 52.

[0078] Next, the partition member 53 will be described in more detail with reference to FIGS. 9 to 11. The partition member 53 is a member for separating the first cooling space Sa and the second cooling space Sb in the machine base longitudinal direction. The partition member 53 is arranged between the fixed wall plate 51 and the movable wall plate 52 in the machine base longitudinal direction. The partition member 53 is configured to be attachable to and detachable from the cooling unit 31A (details will be described later). The partition member 53 has, for example, a first partition plate 86a, a second partition plate 86b, and a plurality of connecting members 87. The first partition plate 86a and the second partition plate 86b are connected by the plurality of connecting members 87. The first cooling space Sa is formed by the first partition plate 86a and the movable wall plate 52. The second cooling space Sb is formed by the second partition plate 86b and the fixed wall plate 51. The first cooling space Sa and the second cooling space Sb are arranged side by side in the machine base longitudinal direction. The first cooling space Sa and the second cooling space Sb are each connected to the intake space Ss.

[0079] The first partition plate 86a is an elongated plate member extending at least in the perpendicular direction (see FIG. 11). The first partition plate 86a is disposed at one end of the partition member 53 in the machine longitudinal direction. The first partition plate 86a is fixed to the connecting member 87, for example, by a screw (not shown). The first partition plate 86a has a first partition portion 88a for forming a first cooling space Sa, and a first yarn insertion guide portion 89a disposed on the other side in the height direction of the first partition portion 88a (see FIGS. 9 and 10).

[0080] A first partition surface 90a is formed in the first partition portion 88a. The first partition surface 90a is located on the other side of the wall surface 74 in the machine frame longitudinal direction and faces the wall surface 74 in the machine frame longitudinal direction. The first partition surface 90a and the wall surface 74 form a first cooling space Sa. The first cooling space Sa and the air intake space Ss are connected via a first air intake slit 34a formed in the wall portion 33 of the air intake duct 32. The first partition surface 90a is provided with multiple contact bodies 91a spaced apart from each other in the yarn running direction. The multiple contact bodies 91a and the above-mentioned multiple contact bodies 75 are arranged in a zigzag pattern when viewed from the height direction (see FIG. 11). The contact bodies 91a are configured to actively bring the first yarn Ya into contact with the contact body 91a. This prevents the first yarn Ya from unintentionally contacting portions of the first partition surface 90a where the contact bodies 91a are not provided. Furthermore, a spacer 92a is provided on one side of the first partition surface 90a in the machine frame longitudinal direction, for example, to regulate the distance between the first partition surface 90a and the wall surface 74 to a predetermined distance (see FIG. 10). The first partition portion 88a is provided with a plurality of through holes 93a, 94a that pass through in the machine frame longitudinal direction (see FIGS. 9 and 10). The through hole 93a is for inserting a first yarn guide 96a (described later). The through hole 94a is for inserting a positioning pin 97a (described later).

[0081] The first thread insertion guide 89a is disposed on the other side in the height direction of the first partition 88a. The first thread insertion guide 89a protrudes further from the first partition 88a toward the other side in the height direction (i.e., the working space Sw side) and the other side in the machine base longitudinal direction (i.e., the second partition plate 86b side).

[0082] The second partition plate 86b is an elongated plate member extending at least in the perpendicular direction (see FIG. 11). The second partition plate 86b is disposed at the other end of the partition member 53 in the machine longitudinal direction. The second partition plate 86b is fixed to the connecting member 87, for example, by screws (not shown). The second partition plate 86b has a second partition portion 88b for forming the second cooling space Sb, and a second yarn insertion guide portion 89b disposed on the other side in the height direction of the second partition portion 88b (see FIGS. 9 and 10).

[0083] A second partition surface 90b is formed in the second partition portion 88b. The second partition surface 90b is disposed on one side of the wall surface 64 in the machine frame longitudinal direction and faces the wall surface 64 in the machine frame longitudinal direction. The second partition surface 90b and the wall surface 64 form a second cooling space Sb. The second cooling space Sb and the air intake space Ss are connected via a second air intake slit 34b formed in the wall portion 33 of the air intake duct 32. The second partition surface 90b is provided with a plurality of contact bodies 91b spaced apart from each other in the yarn running direction. The plurality of contact bodies 91b and the plurality of contact bodies 65 are arranged in a zigzag pattern when viewed from the height direction (see FIG. 11). The contact bodies 91b are configured to actively bring the second yarn Yb into contact with the contact bodies 91b. This prevents the second yarn Yb from unintentionally contacting portions of the second partition surface 90b where the contact bodies 91b are not provided. Furthermore, a spacer 92b similar to the spacer 92a is provided on one side of the second partition surface 90b in the machine frame longitudinal direction (see FIG. 10). The second partition portion 88b is provided with a plurality of through holes 93b, 94b that penetrate in the machine frame longitudinal direction (see FIGS. 9 and 10). The through hole 93b is for inserting a second yarn guide 96b (described later). The through hole 94b is for inserting a positioning pin 97b (described later).

[0084] The second thread insertion guide 89b is disposed on the other side in the height direction of the second partition 88b. The second thread insertion guide 89b protrudes further from the second partition 88b toward the other side in the height direction (i.e., the working space Sw side) and toward one side in the machine longitudinal direction (i.e., the first partition plate 86a side).

[0085] The plurality of connecting members 87 are configured to connect the first partition plate 86a and the second partition plate 86b. The plurality of connecting members 87 are arranged between the first partition plate 86a and the second partition plate 86b in the machine body longitudinal direction. As shown in Figures 9 to 11, each of the plurality of connecting members 87 is provided with a first thread guide 96a, a second thread guide 96b, and positioning pins 97a and 97b.

[0086] The first yarn guide 96a is configured to guide the first yarn Ya downstream in the yarn running direction. The first yarn guide 96a is attached to one side of the connecting member 87 in the machine frame longitudinal direction via, for example, a spring 98a. The first yarn guide 96a is inserted through a through-hole 93a of the first partition plate 86a and protrudes to one side in the machine frame longitudinal direction. The first yarn guide 96a is configured to be movable in the machine frame longitudinal direction in response to expansion and contraction of the spring 98a. Specifically, when the first yarn guide 96a is pressed by the wall surface 74 of the movable wall plate 52, the spring 98a is compressed. When the first yarn guide 96a is separated from the wall surface 74, the spring 98a returns to its initial state.

[0087] The second yarn guide 96b is configured to guide the second yarn Yb downstream in the yarn traveling direction. The second yarn guide 96b is attached to the other side of the connecting member 87 in the machine base longitudinal direction via, for example, a spring 98b. The second yarn guide 96b is inserted through a through-hole 93b of the second partition plate 86b and protrudes to the other side in the machine base longitudinal direction. Similar to the first yarn guide 96a, the second yarn guide 96b is configured to be movable in the machine base longitudinal direction in response to expansion and contraction of the spring 98b.

[0088] The positioning pin 97a is used to align the connecting member 87 and the movable wall plate 52. The positioning pin 97a is fixed, for example, to a surface of one side of the connecting member 87 in the longitudinal direction of the machine base. The positioning pin 97a is inserted into the through hole 94a of the first partition plate 86a and protrudes to one side in the longitudinal direction of the machine base. The positioning pin 97a is configured to be able to be inserted into the through hole 76 of the movable wall plate 52. The positioning pin 97b is used to align the connecting member 87 and the fixed wall plate 51. The positioning pin 97b is fixed, for example, to a surface of the connecting member 87 on the other side in the longitudinal direction of the machine base. The positioning pin 97b is inserted into the through hole 94b of the second partition plate 86b and protrudes to the other side in the longitudinal direction of the machine base. The positioning pin 97b is configured to be able to be inserted into the through hole 66 of the fixed wall plate 51.

[0089] The partition member 53 having the above configuration is supported by the fixed wall plate 51 and the movable wall plate 52 when the movable wall plate 52 is located at the operating position described above. More specifically, when the positioning pin 97a is inserted into the through hole 76 and the positioning pin 97b is inserted into the through hole 66, the partition member 53 is supported at both ends by the fixed wall plate 51 and the movable wall plate 52 (see FIG. 9). In other words, unlike the fixed wall plate 51, the partition member 53 is not fixed to the intake duct 32. Furthermore, when the movable wall plate 52 is located at the removal position described above, the partition member 53 can be removed from the cooling unit 31A (see FIG. 10). That is, the partition member 53 is detachable from the cooling unit 31A. In other words, the partition member 53 is movable relative to the fixed wall plate 51 and the movable wall plate 52.

[0090] In the cooling unit 31A having the above configuration, when the false twisting machine 1 is operating, slit-shaped first and second cooling spaces Sa and Sb are formed side by side in the machine frame longitudinal direction. In this embodiment, the distance between the first cooling space Sa and the second cooling space Sb in the machine frame longitudinal direction (i.e., the distance between the first yarn Ya and the second yarn Yb in the machine frame longitudinal direction) is constant. That is, in this embodiment, this distance does not change depending on the position in the extension direction of the cooling unit 31A. Furthermore, this distance at the upstream end of the cooling unit 31A in the yarn running direction is designated WC1 (see FIG. 4). More strictly defined, WC1 is the distance in the machine frame longitudinal direction between the center of the machine frame longitudinal direction of one end of the first cooling space Sa (on the first heating device 13 side) in the orthogonal direction and the center of the machine frame longitudinal direction of one end of the second cooling space Sb in the orthogonal direction. In this embodiment, the positions of one end of the first cooling space Sa and one end of the second cooling space Sb are approximately the same in the orthogonal direction. At this time, it is preferable that WC1 is approximately equal to or smaller than the above-mentioned interval W1 (see FIG. 4). That is, it is preferable that WC1≦W1. Furthermore, the interval at the downstream end of the cooling unit 31A in the yarn running direction is designated WC2 (see FIG. 5). More precisely, WC2 is the distance in the machine frame longitudinal direction between the center of the end of the first cooling space Sa on the other side (the false twist device 15 side) in the orthogonal direction and the center of the end of the second cooling space Sb on the other side in the orthogonal direction. In this embodiment, the positions of the other end of the first cooling space Sa and the other end of the second cooling space Sb are approximately the same in the orthogonal direction. At this time, it is preferable that WC2 is approximately equal to or larger than the above-mentioned interval W2 (see FIG. 5). That is, it is preferable that W2≦WC2. This effectively prevents bending of the yarn path. In this embodiment, the following relationship holds.

[0091] W2 <WC2=WC1<W1

[0092] Also, in such a configuration, during the threading operation (described later) of the cooling unit 31A, the threading operation can be performed while maintaining both the first yarn Ya and the second yarn Yb substantially linearly. That is, during the threading operation of the cooling unit 31A, it is not necessary to bend the first yarn Ya and the second yarn Yb much. Therefore, it becomes easy to simultaneously thread the first yarn Ya and the second yarn Yb into the cooling unit 31A.

[0093] (Threading operation) In the present embodiment, when the threading operation to the false twisting machine 1 is performed, after the yarn Y is hung on the false twisting device 15, the yarn Y is hung on the cooling device 14 and the first heating device 13. When threading the yarn Y to the cooling device 14 and the first heating device 13, for example, an operator moves the yarn Y upward using an air injection device (not shown). Alternatively, an air injection robot that can operate automatically without manual labor may move the yarn Y upward. The reason is that in the false twisting machine 1 of the present embodiment, the position in the vertical direction of the upstream end portion in the yarn traveling direction of the first heating device 13 is high, and it is difficult for the operator's hand to reach the upstream end portion. When the threading is performed by the above means, the first yarn Ya is guided along the first yarn insertion guide portion 89a and enters the first cooling space Sa through the first inlet 95a. Also, the second yarn Yb is guided along the second yarn insertion guide portion 89b and enters the second cooling space Sb through the second inlet 95b. Note that during the threading operation, it is not necessary for the operator to operate the cooling unit 31A (that is, it is not necessary to move the movable wall plate 52 and the partition member 53).

[0094] Also, as described above, since W2 < WC2 = WC1 < W1, during the threading operation of the cooling unit 31A, the threading operation can be performed while maintaining both the first yarn Ya and the second yarn Yb substantially linearly. That is, during the threading operation of the cooling unit 31A, it is not necessary to bend the first yarn Ya and the second yarn Yb much.

[0095] (Maintenance) Furthermore, when performing maintenance such as cleaning of the cooling device 14, an operator moves the movable wall plate 52 from the operating position to the removal position and removes the partition member 53 from the cooling unit 31A. After cleaning of the partition member 53 is completed, the operator attaches the partition member 53 to the cooling unit 31A. More specifically, with the movable wall plate 52 positioned at the removal position, the operator inserts the positioning pin 97b of the partition member 53 into the through hole 66. Thereafter, the operator moves the movable wall plate 52 to the operating position and inserts the positioning pin 97a into the through hole 76. As a result, the partition member 53 is supported at both ends by the fixed wall plate 51 and the movable wall plate 52.

[0096] As described above, in the false twist device 15 included in the false twisting machine 1 of this embodiment, the first yarn Ya is sandwiched between the first endless belt 46a and the first contact surface 41a, and the second yarn Yb is sandwiched between the second endless belt 46b and the second contact surface 41b. This allows the first yarn Ya and the second yarn Yb to be firmly twisted. Furthermore, because the first contact surface 41a and the second contact surface 41b are formed on the same disk 41, the distance between the first yarn Ya and the second yarn Yb can be reduced in the false twist device 15. Therefore, twists can be imparted to many yarns Y in a small space. Furthermore, in the false twist device 15, the position where the first yarn Ya is false twisted and the position where the second yarn Yb is false twisted can be positioned close to each other. Therefore, it is possible to prevent the yarn path of the first yarn Ya and the yarn path of the second yarn Yb from differing significantly (and the resulting variation in yarn quality between the first yarn Ya and the second yarn Yb).

[0097] Furthermore, the cooling device 14 included in the false twisting machine 1 of this embodiment can thoroughly cool the first yarn Ya and the second yarn Yb with cooling air. Furthermore, because the first cooling space Sa and the second cooling space Sb are formed within the same cooling unit 31A, the distance between the first yarn Ya and the second yarn Yb can be reduced in the cooling device 14. Therefore, a large amount of yarn Y can be cooled in a small space. Furthermore, because the distance between the first yarn Ya and the second yarn Yb can be reduced as described above, it is possible to prevent the yarn paths of the first yarn Ya and the second yarn Yb from differing significantly (and the resulting variation in yarn quality described above).

[0098] In this way, even when false twisting a thick yarn Y, it is possible to ensure good yarn quality while suppressing a loss of production efficiency and uniformity.

[0099] Furthermore, the first cooling space Sa and the second cooling space Sb are arranged side by side in the longitudinal direction of the machine. Therefore, when the first yarn Ya and the second yarn Yb are fed from the cooling device 14 to the false twist device 15, the first yarn Ya and the second yarn Yb can be maintained aligned in the longitudinal direction of the machine. This further prevents the yarn paths of the first yarn Ya and the second yarn Yb from differing from each other, compared to, for example, a case in which the first cooling space Sa and the second cooling space Sb are arranged side by side in a direction different from the longitudinal direction of the machine. Therefore, it is possible to effectively reduce variations in yarn quality between the first yarn Ya and the second yarn Yb.

[0100] Furthermore, WC2 is equal to WC1 (i.e., WC2 is small). Therefore, bending of the first yarn Ya and the second yarn Yb can be suppressed when the first yarn Ya and the second yarn Yb are sent from the cooling device 14 to the false twist device 15. Therefore, deterioration of yarn quality can be suppressed.

[0101] Also, in this embodiment, W2 < WC2 = WC1 < W1. Therefore, during the threading operation of the cooling unit 31A, the threading operation can be performed while maintaining both the first thread Ya and the second thread Yb substantially in a straight line. That is, during the threading operation of the cooling unit 31A, it is not necessary to bend the first thread Ya and the second thread Yb very much. Therefore, it becomes easy to simultaneously thread the first thread Ya and the second thread Yb into the cooling unit 31A.

[0102] Also, the first cooling space Sa and the second cooling space Sb are partitioned by the partition member 53. Therefore, compared with a configuration in which the partition member 53 is not provided and the first cooling space Sa and the second cooling space Sb are not partitioned, it is possible to surely avoid the first thread Ya and the second thread Yb getting entangled with each other due to some cause.

[0103] Also, each of the first cooling space Sa and the second cooling space Sb is connected to an intake space Ss extending in the longitudinal direction of the machine base (that is, connected in parallel). Therefore, by a simple structure, cooling air can be supplied to the first cooling space Sa and the second cooling space Sb substantially uniformly.

[0104] Also, the first cooling space Sa is formed by the wall surface 74 of the movable wall plate 52 and the first partition surface 90a of the first partition portion 88a, and the second cooling space Sb is formed by the wall surface 64 of the fixed wall plate 51 and the second partition surface 90b of the second partition portion 88b. Thus, the first cooling space Sa and the second cooling space Sb can be formed by a simple structure.

[0105] Also, the first partition surface 90a is arranged to face the wall surface 74 in the longitudinal direction of the machine base, and the second partition surface 90b is arranged to face the wall surface 64 in the longitudinal direction of the machine base. Thereby, the first inlet 95a and the second inlet 95b can be narrowed. Therefore, it is possible to suppress the first thread Ya from dropping out of the first cooling space Sa, and it is possible to suppress the second thread Yb from dropping out of the second cooling space Sb.

[0106] The cooling unit 31A also has a first yarn guide 96a and a second yarn guide 96b. As a result, the first yarn Ya is guided downstream in the yarn running direction by the first yarn guide 96a, and the second yarn Yb is guided downstream in the yarn running direction by the second yarn guide 96b. In other words, the cooling unit 31A is not configured to actively bring the yarn Y into contact with the partition surfaces and wall surfaces. Therefore, when the yarn Y is twisted by the false twist device 15, the yarn Y can be prevented from rolling along the wall surfaces or partition surfaces. Therefore, the yarn Y can be prevented from falling out of the cooling space S.

[0107] Furthermore, the partition member 53 is supported by the fixed wall plate 51 and the movable wall plate 52. Therefore, even if the partition member 53 cannot be attached to the intake duct 32, the partition member 53 can be positioned correctly. More specifically, the partition member 53 is supported at both ends. Therefore, the partition member 53 can be stably supported.

[0108] Furthermore, the partition member 53 is detachable (i.e., relatively movable) from the fixed wall plate 51 and the movable wall plate 52. This ensures a large space for cleaning the fixed wall plate 51, the movable wall plate 52, and the partition member 53. This improves the efficiency of cleaning and other operations. Furthermore, since the partition member 53 can be completely detached from the cooling unit 31A, the efficiency of cleaning and other operations can be significantly improved.

[0109] Furthermore, the fixed wall plate 51 is fixed in position relative to the intake duct 32, and the movable wall plate 52 and the partition member 53 are movable relative to the fixed wall plate 51. This allows for the provision of a cooling unit 31B that is configured to be symmetrical to the cooling unit 31A with the line L as the axis of symmetry. Even when such a cooling unit 31B is provided, the two components (fixed wall plates 51, 56) that are arranged adjacent to each other do not move. Therefore, when the components are moved during cleaning, interference between the components can be avoided.

[0110] Furthermore, during threading, the first thread Ya can be moved along the first thread insertion guide portion 89a, and the second thread Yb can be moved along the second thread insertion guide portion 89b, thereby increasing the success rate of threading.

[0111] Furthermore, when the upstream end of the first heating device 13 in the yarn traveling direction is located at a high position in the vertical direction as in this embodiment, a device (not shown) for moving the yarn Y upward is used to thread the yarn on the cooling device 14 and the first heating device 13. When such threading work is performed, it is particularly effective to increase the success rate of threading by using the first yarn insertion guide 89a and the second yarn insertion guide 89b.

[0112] Next, a modified example of the embodiment will be described, with the same reference numerals being used to designate components having the same configuration as the embodiment, and the description thereof will be omitted as appropriate.

[0113] (1) In the above embodiment, the partition member 53 is supported at both ends by the fixed wall plate 51 and the movable wall plate 52. However, this is not limited to this. The partition member 53 may be configured to be cantilevered by one of the fixed wall plate 51 and the movable wall plate 52.

[0114] (2) In the above-described embodiments, the partition member 53 is supported by at least one of the fixed wall plate 51 and the movable wall plate 52. However, this is not limited to this. The partition member 53 may be attached directly to the intake duct 32, for example.

[0115] (3) In the above-described embodiment, the partition member 53 is detachable from the cooling unit 31A. However, this is not limited to this. For example, the partition member 53 may be configured to be movable in the machine base longitudinal direction while being supported by at least one of the fixed wall plate 51 and the movable wall plate 52.

[0116] (4) In the above-described embodiments, the movable wall plate 52 and the partition member 53 are movable relative to the fixed wall plate 51 and the intake duct 32. However, this is not limited to this. For example, the partition member 53 may be fixed to the intake duct 32. In this case, instead of the fixed wall plate 51, a wall member (not shown) that is movable relative to the intake duct 32 and the partition member 53 may be provided. A false twisting machine (not shown) configured in this manner also corresponds to the "false twisting machine in which the partition member is configured to be movable relative to the first wall member and the second wall member" of the present invention.

[0117] (5) In the above-described embodiment, the partition member 53 is configured to be movable relative to the first wall member and the second wall member of the present invention. However, this is not limited to this. Any of these members may be fixed in position relative to the intake duct 32.

[0118] (6) In the above-described embodiments, the cooling device 14 is a non-contact device having a first yarn guide 96a and a second yarn guide 96b. However, this is not limited to this. The cooling device 14 may be configured to actively bring the yarn Y into contact with a wall surface (not shown), as in the cooling device disclosed in Japanese Patent Laid-Open No. 11-107084. In such a configuration, it is preferable to devise some measure to prevent the yarn Y from falling off the cooling device 14.

[0119] (7) In the above-described embodiments, the first partition surface 90a is arranged to face the wall surface 74 in the machine base longitudinal direction, and the second partition surface 90b is arranged to face the wall surface 64 in the machine base longitudinal direction. In other words, the first partition surface 90a and the wall surface 74 are generally parallel, and the second partition surface 90b and the wall surface 64 are generally parallel. However, this is not limited to this. For example, the first partition surface 90a and the wall surface 74 may be arranged such that the distance between them in the machine base longitudinal direction increases as they move toward the other side in the height direction. The same applies to the second partition surface 90b and the wall surface 64.

[0120] (8) In the above-described embodiments, the cooling unit 31A has the fixed wall plate 51, the movable wall plate 52, and the partition member 53. However, this is not limited to this. For example, instead of the fixed wall plate 51, the movable wall plate 52, and the partition member 53, a single member having the same function as these members may be attached to the intake duct 32.

[0121] (9) In the above-described embodiments, the first cooling space Sa and the second cooling space Sb are separated by the partition member 53. However, this is not limited to this. For example, a plurality of pins (not shown) extending in the height direction may be arranged in the yarn traveling direction between the first cooling space Sa and the second cooling space Sb. These pins may be arranged apart from each other in the yarn traveling direction. This may restrict the movement of the first yarn Ya and the second yarn Yb in the machine longitudinal direction and prevent the first yarn Ya and the second yarn Yb from becoming entangled.

[0122] (10) In the above-described embodiments, the first cooling space Sa and the second cooling space Sb are each connected (i.e., connected in parallel) to the intake space Ss extending in the machine frame longitudinal direction. However, this is not limited to this. For example, the first cooling space Sa and the second cooling space Sb may be connected in series in the intake direction in which the cooling air is drawn into the intake space Ss. In other words, one of the first cooling space Sa and the second cooling space Sb may be located upstream of the other in the intake direction.

[0123] (11) In the above-described embodiments, the distance in the longitudinal direction of the machine base between the first cooling space Sa and the second cooling space Sb (that is, the distance in the longitudinal direction of the machine base between the first yarn Ya and the second yarn Yb) was assumed to be constant. That is, in the cooling unit 31A, the first yarn Ya and the second yarn Yb are substantially parallel (more specifically, WC1 = WC2). However, this is not restrictive. In the cooling unit 31A, the first yarn Ya and the second yarn Yb do not have to be substantially parallel. For example, the distance at the downstream end in the yarn running direction of the cooling unit 31A may be narrower than the distance at the upstream end in the yarn running direction (WC2 < WC1). That is, WC2 ≤ WC1 may be satisfied. Alternatively, WC1 < WC2 may be satisfied.

[0124] Also, in the orthogonal direction, the positions of one ends of the first cooling space Sa and the positions of one ends of the second cooling space Sb do not have to substantially coincide. In the orthogonal direction, the positions of the other ends of the first cooling space Sa and the positions of the other ends of the second cooling space Sb do not have to substantially coincide. Even in this case, the exact definitions of WC1 and WC2 are the same as those described above.

[0125] (12) The relationship among W1, W2, WC1, and WC2 may be other than W2 < WC2 = WC1 < W1. For example, as described above, in order to facilitate threading the first yarn Ya and the second yarn Yb into the cooling unit 31A simultaneously, the yarn guides G1, G2, and the cooling unit 31A may be configured to satisfy any of the following relationships. That is, W2 ≤ WC2 ≤ WC1 ≤ W1 may be satisfied. Alternatively, W1 ≤ WC1 ≤ WC2 ≤ W2 may be satisfied. In this case, unlike the above-described embodiments, W2 may be larger than W1.

[0126] Alternatively, when not considering whether to thread the first yarn Ya and the second yarn Yb into the cooling unit 31A simultaneously, the relationship among W1, W2, WC1, and WC2 is not limited to those described above.

[0127] (13) In the above-described embodiments, the first cooling space Sa and the second cooling space Sb are arranged side by side in the longitudinal direction of the machine base, but this is not limited thereto. For example, as in the cooling device (not shown) disclosed in Japanese Patent No. 4462751, the first cooling space (not shown) and the second cooling space (not shown) may be arranged side by side in the height direction.

[0128] (14) In the above-described embodiment, each of the cooling units 31 is capable of cooling two yarns Y. However, this is not limited to this. The following description will be made with reference to FIG. 12. For example, instead of the cooling unit 31, a cooling unit 31M1 configured to cool three yarns Y running side by side in the longitudinal direction of the machine base, as shown in FIG. 12, may be provided. The cooling unit 31M1 includes, for example, the fixed wall plate 51 described above, the partition member 53 described above, the partition member 53A described above, and the movable wall plate 52 described above. The partition member 53A is disposed on the opposite side of the fixed wall plate 51 in the longitudinal direction of the machine base, with the partition member 53 separating them. In this modification, the movable wall plate 52 is disposed on the opposite side of the fixed wall plate 51 in the longitudinal direction of the machine base, with the partition members 53 and 53A separating them.

[0129] The partition member 53A is a member extending at least in the orthogonal direction. The partition member 53A has a generally U-shaped cross section (see FIG. 12) when viewed from the same direction as FIG. 9. The partition member 53A has a partition portion 88c, a bottom portion 99, a partition portion 88d, a thread insertion guide portion 89c, and a thread insertion guide portion 89d. The partition portion 88c is a portion extending in the height direction. The partition portion 88c has a partition surface 90c arranged to face the first partition surface 90a in the machine base longitudinal direction. The first cooling space Sa described above is formed between the first partition surface 90a and the partition surface 90c. The partition portion 88c has a through hole 94c formed in it, which has substantially the same shape and size as the through holes 94a, 94b. The bottom portion 99 is connected to the partition portion 88c and is in contact with the wall portion 33. The partition portion 88d is a portion connected to the bottom portion 99 and extending in the height direction. The partition portion 88d has a partition surface 90d arranged to face the wall surface 74 of the movable wall plate 52 in the machine frame longitudinal direction. A cooling space Sd for cooling a yarn Yd different from the first yarn Ya and the second yarn Yb is formed between the wall surface 74 and the partition surface 90d. A through hole 94d having substantially the same shape and size as the through hole 94c is formed in the partition portion 88d. The yarn insertion guide portion 89c is a portion connected to the partition portion 88c and extending to the opposite side of the bottom portion 99 in the height direction. The yarn insertion guide portion 89d is a portion connected to the partition portion 88d and extending to the opposite side of the bottom portion 99 in the height direction.

[0130] Furthermore, in the cooling unit 31M1, for example, an air intake slit 34d connecting the air intake space Ss and the cooling space Sd is formed in the wall portion 33. A connecting member 87A having the same structure as the connecting member 87 is fixed to the movable wall plate 52. A spacer 92d that defines the gap between the wall surface 74 and the partition surface 90d is provided between the wall surface 74 and the partition surface 90d in the machine frame longitudinal direction. A yarn guide 96d having the same structure as the second yarn guide 96b is attached to the connecting member 87A. A positioning pin 97d having the same structure as the positioning pin 97b is attached to the connecting member 87A.

[0131] (15) As yet another modified example, as shown in FIG. 13, a cooling unit 31M2 configured to cool four yarns Y running side by side in the longitudinal direction of the machine frame may be provided. Although detailed description is omitted, the cooling unit 31M2 may include, for example, two partition members 53 separated by a partition member 53A in the longitudinal direction of the machine frame. This allows the cooling unit 31M2 to form a cooling space Se for cooling a yarn Ye separate from the first yarn Ya, the second yarn Yb, and the yarn Yd. In this modified example, an air intake slit 34e connecting the air intake space Ss and the cooling space Se is formed in the wall portion 33. Furthermore, by applying this modified example and the modified example (13) described above, each cooling unit (not shown) may be configured to simultaneously cool five or more yarns Y. [Explanation of symbols]

[0132] 1 False twisting machine 13 First heating device (heating device) 14 Cooling device 15 False twisting device 31 Cooling unit 31A Cooling Unit 32 Intake duct 41 Disc 41a 1st contact surface 41b Second contact surface 42a First belt unit 42b Second belt unit 46a First endless belt (first belt member) 46b Second endless belt (second belt member) 51 Fixed wall plate (second wall member) 52 Movable wall plate (first wall member) 53 Partition member 64 Wall (1st Wall) 74 Wall (Second Wall) 89a First thread insertion guide part 89b Second thread insertion guide part 90a First partition 90b Second partition 96a First thread guide 96b Second thread guide Sa 1st cooling space Sb 2nd cooling space Ss Intake space W1 spacing W2 interval WC1 interval WC2 interval Ya First Thread Yb Second Thread

Claims

1. A false twisting machine configured to simultaneously false twist at least a running first yarn and a running second yarn, a false twisting device configured to impart twist to the first yarn and the second yarn; a cooling device arranged upstream of the false twist device in a yarn running direction in which the first yarn and the second yarn run, and configured to cool the first yarn and the second yarn; the false twist device includes a disk configured to rotate with a rotation axis in a predetermined direction, a first belt unit arranged on one side of the disk in the predetermined direction, and a second belt unit arranged on the other side of the disk in the predetermined direction; the disk has a first contact surface disposed at an end on the one side in the predetermined direction and a second contact surface disposed at an end on the other side in the predetermined direction, the first belt unit has a first belt member that is movable while contacting the first yarn, and is configured to sandwich the first yarn between the first contact surface and the first belt member to impart twist to the first yarn; the second belt unit has a second belt member that is movable while contacting the second yarn, and is configured to sandwich the second yarn between the second contact surface and the second belt member to impart twist to the second yarn; The cooling device is a cooling unit including a first cooling space for cooling the first yarn and a second cooling space arranged alongside the first cooling space for cooling the second yarn; an intake duct that supplies cooling air to the first cooling space and the second cooling space, the intake duct having an intake space connected to the first cooling space and the second cooling space; the first cooling space and the second cooling space are arranged side by side in the predetermined direction, The cooling unit comprises: a partition member that separates the first cooling space and the second cooling space in the predetermined direction, The partition member is a first partition portion having a first partition surface disposed on the one side in the predetermined direction so as to form the first cooling space; a second partition portion having a second partition surface disposed on the other side in the predetermined direction so as to form the second cooling space, The cooling unit comprises: a first wall member having a first wall surface for forming the first cooling space, the first wall surface being disposed on the one side of the first partition surface in the predetermined direction; a second wall member having a second wall surface for forming the second cooling space, the second wall member being disposed on the other side of the second partition surface in the predetermined direction; At least the partition member is configured to be movable relative to the first wall member and the second wall member, the first wall member and the second wall member are attached to the intake duct, 10. The false twisting machine according to claim 9, wherein at least one of the first wall member and the second wall member is configured to support the partition member.

2. 2. The false twisting machine according to claim 1, wherein WC2≦WC1 is satisfied, where WC1 is a distance in the predetermined direction between an upstream end of the first cooling space in the yarn running direction and an upstream end of the second cooling space in the yarn running direction, and WC2 is a distance in the predetermined direction between a downstream end of the first cooling space in the yarn running direction and a downstream end of the second cooling space in the yarn running direction.

3. a heating device arranged upstream of the cooling device in the yarn running direction; an upstream guide member disposed between the heating device and the cooling device in the yarn running direction; a downstream guide member disposed between the cooling device and the false twist device in the yarn running direction, the upstream guide member is configured to define a distance W1 between the first yarn and the second yarn in the predetermined direction; the downstream guide member is configured to define a distance W2 between the first yarn and the second yarn in the predetermined direction; 2. The false twisting machine according to claim 1, wherein W2≦WC2≦WC1≦W1 or W1≦WC1≦WC2≦W2 is satisfied, where WC1 is a distance in the predetermined direction between an upstream end of the first cooling space in the yarn running direction and an upstream end of the second cooling space in the yarn running direction, and WC2 is a distance in the predetermined direction between a downstream end of the first cooling space in the yarn running direction and a downstream end of the second cooling space in the yarn running direction.

4. The intake space extends in the predetermined direction, 2. The false twisting machine according to claim 1, wherein the first cooling space and the second cooling space are each connected to the intake space.

5. the first partition surface is disposed to face the first wall surface in the predetermined direction, 2. The false twisting machine according to claim 1, wherein the second partition surface is disposed so as to face the second wall surface in the predetermined direction.

6. The cooling unit comprises: a first yarn guide disposed between the first partition surface and the first wall surface in the predetermined direction and configured to guide the first yarn downstream in the yarn traveling direction; a second yarn guide disposed between the second partition surface and the second wall surface in the predetermined direction and guiding the second yarn downstream in the yarn running direction.

7. 2. The false twisting machine according to claim 1, wherein both the first wall member and the second wall member are configured to support the partition member.

8. 7. The false twisting machine according to claim 6, wherein both the first wall member and the second wall member are configured to support the partition member.

9. one of the first wall member and the second wall member is fixed in position with respect to the intake duct, The false twisting machine according to any one of claims 1 to 8, characterized in that the other of the first wall member and the second wall member and the partition member are movable relative to the one of the first wall member and the second wall member.

10. 9. The false twisting machine according to claim 1, wherein the partition member is configured to be detachable from the cooling unit.

11. A false twisting machine as described in Claim 9, characterized in that the partition member is configured to be detachable from the cooling unit.

12. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 9. The false twisting machine according to claim 1, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

13. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 10. The false twisting machine according to claim 9, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

14. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 11. The false twisting machine according to claim 10, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

15. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 12. The false twisting machine according to claim 11, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

16. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 13. The false twisting machine according to claim 12, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

17. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 14. The false twisting machine according to claim 13, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

18. A heating device is provided which is arranged upstream of the cooling device in the yarn running direction and is configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 15. The false twisting machine according to claim 14, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

19. A heating device is provided which is arranged upstream of the cooling device in the yarn running direction and is configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 16. The false twisting machine according to claim 15, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

20. A false twisting machine configured to be able to simultaneously false twist at least a first yarn and a second yarn that are running, a false twisting device configured to impart twist to the first yarn and the second yarn; a cooling device arranged upstream of the false twist device in a yarn running direction in which the first yarn and the second yarn run, and configured to cool the first yarn and the second yarn; the false twist device includes a disk configured to rotate with a rotation axis in a predetermined direction, a first belt unit arranged on one side of the disk in the predetermined direction, and a second belt unit arranged on the other side of the disk in the predetermined direction; the disk has a first contact surface disposed at an end on the one side in the predetermined direction and a second contact surface disposed at an end on the other side in the predetermined direction, the first belt unit has a first belt member that is movable while contacting the first yarn, and is configured to sandwich the first yarn between the first contact surface and the first belt member to impart twist to the first yarn; the second belt unit has a second belt member that is movable while contacting the second yarn, and is configured to sandwich the second yarn between the second contact surface and the second belt member to impart twist to the second yarn; The cooling device is a cooling unit including a first cooling space for cooling the first yarn and a second cooling space arranged alongside the first cooling space for cooling the second yarn; an intake duct that supplies cooling air to the first cooling space and the second cooling space, the intake duct having an intake space connected to the first cooling space and the second cooling space; the first cooling space and the second cooling space are arranged side by side in the predetermined direction, The cooling unit comprises: a partition member that separates the first cooling space and the second cooling space in the predetermined direction, The partition member is a first partition portion having a first partition surface disposed on the one side in the predetermined direction so as to form the first cooling space; a second partition portion having a second partition surface disposed on the other side in the predetermined direction so as to form the second cooling space, The cooling unit comprises: a first wall member having a first wall surface for forming the first cooling space, the first wall surface being disposed on the one side of the first partition surface in the predetermined direction; a second wall member having a second wall surface for forming the second cooling space, the second wall member being disposed on the other side of the second partition surface in the predetermined direction; At least the partition member is configured to be movable relative to the first wall member and the second wall member, one of the first wall member and the second wall member is fixed in position with respect to the intake duct, The false twisting machine, wherein the other of the first wall member and the second wall member and the partition member are movable relative to the one of the first wall member and the second wall member.

21. A false twisting machine as described in Claim 20, characterized in that the partition member is configured to be detachable from the cooling unit.

22. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 21. The false twisting machine according to claim 20, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

23. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 22. The false twisting machine according to claim 21, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

24. A heating device is provided which is arranged upstream of the cooling device in the yarn running direction and is configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 23. The false twisting machine according to claim 22, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

25. A heating device is provided which is arranged upstream of the cooling device in the yarn running direction and is configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 24. The false twisting machine according to claim 23, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

26. A false twisting machine configured to be able to simultaneously false twist at least a first yarn and a second yarn that are running, a false twisting device configured to impart twist to the first yarn and the second yarn; a cooling device arranged upstream of the false twist device in a yarn running direction in which the first yarn and the second yarn run, and configured to cool the first yarn and the second yarn; a doubling device disposed downstream of the false twist device in the yarn running direction and configured to doubling the first yarn and the second yarn, the false twist device includes a disk configured to rotate with a rotation axis in a predetermined direction, a first belt unit arranged on one side of the disk in the predetermined direction, and a second belt unit arranged on the other side of the disk in the predetermined direction; the disk has a first contact surface disposed at an end on the one side in the predetermined direction and a second contact surface disposed at an end on the other side in the predetermined direction, the first belt unit has a first belt member that is movable while contacting the first yarn, and is configured to sandwich the first yarn between the first contact surface and the first belt member to impart twist to the first yarn; the second belt unit has a second belt member that is movable while contacting the second yarn, and is configured to sandwich the second yarn between the second contact surface and the second belt member to impart twist to the second yarn; The cooling device is a cooling unit including a first cooling space for cooling the first yarn and a second cooling space arranged alongside the first cooling space for cooling the second yarn; an intake duct that supplies cooling air to the first cooling space and the second cooling space, the intake duct having an intake space connected to the first cooling space and the second cooling space; the first cooling space and the second cooling space are arranged side by side in the predetermined direction, a heating device arranged upstream of the cooling device in the yarn running direction; an upstream guide member disposed between the heating device and the cooling device in the yarn running direction; a downstream guide member disposed between the cooling device and the false twist device in the yarn running direction, the upstream guide member is configured to define a distance W1 between the first yarn and the second yarn in the predetermined direction; the downstream guide member is configured to define a distance W2 between the first yarn and the second yarn in the predetermined direction; where WC1 is a distance in the predetermined direction between the upstream end of the first cooling space in the yarn running direction and the upstream end of the second cooling space in the yarn running direction, and WC2 is a distance in the predetermined direction between the downstream end of the first cooling space in the yarn running direction and the downstream end of the second cooling space in the yarn running direction, W2≦WC2≦WC1≦W1, The cooling unit comprises: a partition member that separates the first cooling space and the second cooling space in the predetermined direction, The partition member is a first partition portion having a first partition surface disposed on the one side in the predetermined direction so as to form the first cooling space; a second partition portion having a second partition surface disposed on the other side in the predetermined direction so as to form the second cooling space, The cooling unit comprises: a first wall member having a first wall surface for forming the first cooling space, the first wall surface being disposed on the one side of the first partition surface in the predetermined direction; a second wall member having a second wall surface for forming the second cooling space, the second wall member being disposed on the other side of the second partition surface in the predetermined direction; the first wall member and the second wall member are attached to the intake duct, 10. The false twisting machine according to claim 9, wherein at least one of the first wall member and the second wall member is configured to support the partition member.

27. The intake space extends in the predetermined direction, 27. The false twisting machine according to claim 26, wherein the first cooling space and the second cooling space are each connected to the intake space.

28. the first partition surface is disposed to face the first wall surface in the predetermined direction, 27. The false twisting machine according to claim 26, wherein the second partition surface is disposed so as to face the second wall surface in the predetermined direction.

29. the first partition surface is disposed to face the first wall surface in the predetermined direction, 28. The false twisting machine according to claim 27, wherein the second partition surface is disposed so as to face the second wall surface in the predetermined direction.

30. The cooling unit comprises: a first yarn guide disposed between the first partition surface and the first wall surface in the predetermined direction and configured to guide the first yarn downstream in the yarn traveling direction; 27. The false twisting machine according to claim 26, further comprising: a second yarn guide arranged between the second partition surface and the second wall surface in the predetermined direction, and guiding the second yarn downstream in the yarn running direction.

31. The cooling unit comprises: a first yarn guide disposed between the first partition surface and the first wall surface in the predetermined direction and configured to guide the first yarn downstream in the yarn traveling direction; 28. The false twisting machine according to claim 27, further comprising: a second yarn guide arranged between the second partition surface and the second wall surface in the predetermined direction, and guiding the second yarn downstream in the yarn running direction.

32. The cooling unit comprises: a first yarn guide disposed between the first partition surface and the first wall surface in the predetermined direction and configured to guide the first yarn downstream in the yarn traveling direction; a second yarn guide disposed between the second partition surface and the second wall surface in the predetermined direction and guiding the second yarn downstream in the yarn running direction.

33. The cooling unit comprises: a first yarn guide disposed between the first partition surface and the first wall surface in the predetermined direction and configured to guide the first yarn downstream in the yarn traveling direction; 30. The false twisting machine according to claim 29, further comprising: a second yarn guide arranged between the second partition surface and the second wall surface in the predetermined direction, and guiding the second yarn downstream in the yarn running direction.

34. 27. The false twisting machine according to claim 26, wherein both the first wall member and the second wall member are configured to support the partition member.

35. 35. The false twisting machine according to claim 26, wherein at least the partition member is configured to be movable relative to the first wall member and the second wall member.

36. one of the first wall member and the second wall member is fixed in position with respect to the intake duct, 36. The false twisting machine according to claim 35, wherein the other of the first wall member and the second wall member and the partition member are movable relative to the one of the first wall member and the second wall member.

37. 36. The false twisting machine according to claim 35, wherein the partition member is configured to be detachable from the cooling unit.

38. 37. The false twisting machine according to claim 36, wherein the partition member is configured to be detachable from the cooling unit.

39. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; and a second yarn insertion guide portion that protrudes toward the work space further than the second partition portion at least in the height direction.

40. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 36. The false twisting machine according to claim 35, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

41. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 37. The false twisting machine according to claim 36, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

42. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 38. The false twisting machine according to claim 37, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

43. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 39. The false twisting machine according to claim 38, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

44. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 40. The false twisting machine according to claim 39, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

45. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 41. The false twisting machine according to claim 40, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

46. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 42. The false twisting machine according to claim 41, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

47. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 43. The false twisting machine according to claim 42, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

48. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 44. The false twisting machine according to claim 43, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

49. A false twisting machine configured to be able to simultaneously false twist at least a first yarn and a second yarn that are running, a false twisting device configured to impart twist to the first yarn and the second yarn; a cooling device arranged upstream of the false twist device in a yarn running direction in which the first yarn and the second yarn run, and configured to cool the first yarn and the second yarn; a doubling device disposed downstream of the false twist device in the yarn running direction and configured to doubling the first yarn and the second yarn, the false twist device includes a disk configured to rotate with a rotation axis in a predetermined direction, a first belt unit arranged on one side of the disk in the predetermined direction, and a second belt unit arranged on the other side of the disk in the predetermined direction; the disk has a first contact surface disposed at an end on the one side in the predetermined direction and a second contact surface disposed at an end on the other side in the predetermined direction, the first belt unit has a first belt member that is movable while contacting the first yarn, and is configured to sandwich the first yarn between the first contact surface and the first belt member to impart twist to the first yarn; the second belt unit has a second belt member that is movable while contacting the second yarn, and is configured to sandwich the second yarn between the second contact surface and the second belt member to impart twist to the second yarn; The cooling device is a cooling unit including a first cooling space for cooling the first yarn and a second cooling space arranged alongside the first cooling space for cooling the second yarn; an intake duct that supplies cooling air to the first cooling space and the second cooling space, the intake duct having an intake space connected to the first cooling space and the second cooling space; the first cooling space and the second cooling space are arranged side by side in the predetermined direction, a heating device arranged upstream of the cooling device in the yarn running direction; an upstream guide member disposed between the heating device and the cooling device in the yarn running direction; a downstream guide member disposed between the cooling device and the false twist device in the yarn running direction, the upstream guide member is configured to define a distance W1 between the first yarn and the second yarn in the predetermined direction; the downstream guide member is configured to define a distance W2 between the first yarn and the second yarn in the predetermined direction; where WC1 is a distance in the predetermined direction between the upstream end of the first cooling space in the yarn running direction and the upstream end of the second cooling space in the yarn running direction, and WC2 is a distance in the predetermined direction between the downstream end of the first cooling space in the yarn running direction and the downstream end of the second cooling space in the yarn running direction, W2≦WC2≦WC1≦W1, The cooling unit comprises: a partition member that separates the first cooling space and the second cooling space in the predetermined direction, The partition member is a first partition portion having a first partition surface disposed on the one side in the predetermined direction so as to form the first cooling space; a second partition portion having a second partition surface disposed on the other side in the predetermined direction so as to form the second cooling space, The cooling unit comprises: a first wall member having a first wall surface for forming the first cooling space, the first wall surface being disposed on the one side of the first partition surface in the predetermined direction; a second wall member having a second wall surface for forming the second cooling space, the second wall member being disposed on the other side of the second partition surface in the predetermined direction; At least the partition member is configured to be movable relative to the first wall member and the second wall member, one of the first wall member and the second wall member is fixed in position with respect to the intake duct, The false twisting machine, wherein the other of the first wall member and the second wall member and the partition member are movable relative to the one of the first wall member and the second wall member.

50. 50. The false twisting machine according to claim 49, wherein the partition member is configured to be detachable from the cooling unit.

51. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 50. The false twisting machine according to claim 49, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

52. When a direction perpendicular to both the longitudinal direction of the cooling unit and the predetermined direction is defined as a height direction, The partition member is a first yarn insertion guide portion that protrudes toward a work space where a yarn threading operation to the cooling device is performed, more than the first partition portion in at least the height direction; 51. The false twisting machine according to claim 50, further comprising: a second yarn insertion guide portion that protrudes toward the work space beyond the second partition portion at least in the height direction.

53. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 52. The false twisting machine according to claim 51, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

54. a heating device disposed upstream of the cooling device in the yarn running direction and configured to heat the first yarn and the second yarn; the false twisting device, the cooling device, and the heating device are disposed above the working space; 53. The false twisting machine according to claim 52, wherein an upstream end of the heating device in the yarn traveling direction is disposed above and farther from the cooling device in the vertical direction than a downstream end of the heating device in the yarn traveling direction.

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