False-twist texturing machine

Abstract

In an airflow generator (32), pressure loss is reduced and energy saving is achieved. A false-twist texturing machine (1) of the present invention includes a main frame (8), a processing unit (3) which is provided on each of one side and the other side in the width direction of the main frame (8) and is configured to process yarns (Y) aligned in the longitudinal direction of the main frame (8), and an airflow generator (32) included in the processing unit (3). The airflow generator (32) includes a first extending duct (61) which is on one side in the width direction of a center line (C) extending in the longitudinal direction and passing through the center in the width direction of the main frame (8) and extends along the longitudinal direction, a second extending duct (62) which is on the other side in the width direction of the center line (C) and extends along the longitudinal direction, and a blower (63). The blower (63) is connected to one end (61x) of the first extending duct (61) and one end (62x) of the second extending duct (62), and is shared between the first extending duct (61) and the second extending duct (62).

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a false-twist texturing machine provided with an airflow generator.

[0002] Patent Literature 1 (Japanese Laid-Open Patent Publication No. 2023-012097) discloses a cooler (airflow generator) applied to a false-twist texturing machine, which includes a duct in which an in-duct space is formed and a negative pressure generator (blower) which is provided at one end or the other end in the longitudinal direction of the duct and is configured to generate negative pressure in the in-duct space. The duct and the negative pressure generator are arranged to be left-right symmetrical in the width direction of a main frame of the false-twist texturing machine, relative to the main frame.SUMMARY OF THE INVENTION

[0003] In Patent Literature 1, a negative pressure generator (blower) is provided for each of the two ducts which are arranged on one side and the other side in the width direction of the main frame, respectively. In this case, in each duct, a significant pressure loss occurs in the airflow. Due to this, it is impossible to generate a sufficient amount of airflow reaching the other end, which is opposite to one end in the longitudinal direction where the blower is provided. As a result, it becomes necessary to increase the drive force of the blower in order to generate a sufficient amount of airflow throughout each duct in the longitudinal direction. It is therefore impossible to achieve energy saving. This issue becomes more pronounced as the length of the duct increases in the longitudinal direction.

[0004] An object of the present invention is to provide a false-twist texturing machine which can reduce pressure loss in an airflow generator in order to achieve energy saving.

[0005] A false-twist texturing machine of the present invention includes: a main frame; a processing unit which is provided on each of one side and the other side in a width direction of the main frame and is configured to process yarns aligned in a longitudinal direction of the main frame; and an airflow generator which is included in the processing unit, the airflow generator including: a first extending duct which is provided on the one side in the width direction of the main frame and extends along the longitudinal direction; a second extending duct which is provided on the other side in the width direction of the main frame and extends along the longitudinal direction; a blower which generates an airflow in the longitudinal direction; and an intervening duct which is provided between the first extending duct and the blower and between the second extending duct and the blower and is aligned with the blower in the longitudinal direction, the first extending duct and the second extending duct being aligned in the width direction, one end in the longitudinal direction of the first extending duct and one end in the longitudinal direction of the second extending duct being connected to the blower, and the intervening duct having a protruding portion which protrudes toward the blower from an inner surface that is on the opposite side of the blower in the longitudinal direction.

[0006] According to this aspect of the present invention, the blower is connected to one ends in the longitudinal direction of the first extending duct and the second extending duct which are aligned in the width direction. In this case, as compared to a case where a blower is connected to one end in the longitudinal direction of one extending duct (a long extending duct formed by connecting the first extending duct with the second extending duct), the pressure loss of the airflows generated in the ducts is reduced, with the result that sufficient amounts of airflows are generated in the ducts. That is, according to the aspect of the present invention, in the airflow generator, it is possible to reduce pressure loss and achieve energy savings.

[0007] Furthermore, according to the aspect of the present invention, the intervening duct has the protruding portion. When the blower generates a negative pressure in each of the extending ducts, the airflow from the first extending duct toward the blower and the airflow from the second extending duct toward the blower may collide in the intervening duct, and a turbulent flow may be generated. In this regard, according to the aspect of the present invention, the turbulent flow is suppressed as the airflows collide the protruding portion before colliding each other. When the blower generates a positive pressure in each extending duct, the protruding portion makes it possible to smoothly branch the airflow supplied from the blower to the intervening duct toward each extending duct. By suppressing the turbulent flow or smoothing the flow of the airflow in this way, the airflow generator can further suppress the pressure loss and further improve the energy saving.

[0008] Preferably, the airflow generator further includes: a first inclined duct which is provided between the first extending duct and the blower; and a second inclined duct which is provided between the second extending duct and the blower, the first inclined duct is inclined relative to the longitudinal direction such that, as it extends from the one end of the first extending duct toward from the blower in the longitudinal direction, it shifts toward the second extending duct in the width direction, the second inclined duct is inclined relative to the longitudinal direction such that, as it extends from the one end of the second extending duct toward the blower in the longitudinal direction, it shifts toward the first extending duct in the width direction, and an angle which is formed between the center line of the first extending duct and the center line of the first inclined duct and is on the side of facing a space between the first extending duct and the second extending duct spaced apart from each other in the width direction is an obtuse angle, and an angle which is formed between the center line of the second extending duct and the center line of the second inclined duct and is on the side of facing the space is an obtuse angle.

[0009] When these angles are 90° or less, significant pressure loss occurs in the airflow between each of the extending ducts and each of the inclined ducts. In this regard, according to the configuration above, because the angles are obtuse, the pressure loss is small, and hence air flows smoothly between each of the extending ducts and each of the inclined ducts. Therefore, according to the configuration described above, the airflow generator can further suppress the pressure loss and further improves the energy saving.

[0010] Preferably, the airflow generator further includes an intervening duct which is provided between the first inclined duct and the blower and between the second inclined duct and the blower, and an angle which is formed between the center line of the first inclined duct and the center line of the intervening duct and is on the side of facing the space is an obtuse angle, and an angle which is formed between the center line of the second inclined duct and the center line of the intervening duct and is on the side of facing the space is an obtuse angle.

[0011] When these angles are 90° or less, significant pressure loss occurs in the airflow between each of the inclined ducts and the intervening duct. In this regard, according to the configuration above, because the angles are obtuse, the pressure loss is small, and hence air flows smoothly between each of the inclined ducts and the intervening duct. Therefore, according to the configuration described above, the airflow generator can further suppress the pressure loss and further improves the energy saving.

[0012] Preferably, the protruding portion includes: a first inclined surface, provided on the first extending duct side in the width direction, is inclined relative to the longitudinal direction such that, as it extends from the inner surface toward the blower in the longitudinal direction, it shifts toward the second extending duct in the width direction; and a second inclined surface, provided on the second extending duct side in the width direction, is inclined relative to the longitudinal direction such that, as it extends from the inner surface toward the blower in the longitudinal direction, it shifts toward the first extending duct in the width direction.

[0013] According to this configuration, by generating an airflow along each of the inclined surfaces of the protruding portion in the intervening duct, the above-described effect of suppressing the turbulent flow and smoothly branching the airflow can be obtained more reliably.

[0014] Preferably, the airflow generator further includes: a first inclined duct which is provided between the first extending duct and the intervening duct; and a second inclined duct which is provided between the second extending duct and the intervening duct, the first inclined duct is inclined relative to the longitudinal direction such that, as it extends from the one end of the first extending duct toward the intervening duct in the longitudinal direction, it shifts toward the second extending duct in the width direction, the second inclined duct is inclined relative to the longitudinal direction such that, as it extends from the one end of the second extending duct toward the intervening duct in the longitudinal direction, it shifts toward the first extending duct in the width direction, and in a plane in parallel to the longitudinal direction and the width direction, the protruding portion protrudes toward the blower as compared to an intersection between a first virtual straight line which extends along an inner surface of the first inclined duct, which is on the opposite side of the blower in the longitudinal direction, and a second virtual straight line which extends along an inner surface of the second inclined duct, which is on the opposite side of the blower in the longitudinal direction.

[0015] According to this configuration, as the protruding portion protrudes toward the blower as compared to the intersection, the above-described effect of suppressing the turbulent flow and smoothly branching the airflow can be obtained more reliably.

[0016] Preferably, the protruding portion is provided over entirety of the intervening duct in an up-down direction that is orthogonal to both the width direction and the longitudinal direction.

[0017] With this configuration, the above-described effect of suppressing the turbulent flow and smoothly branching the airflow can be obtained over the entirety of the intervening duct in the up-down direction.

[0018] Preferably, the airflow generator is symmetrical in shape with respect to a center line that extends in the longitudinal direction and passes through the center in the width direction of the main frame.

[0019] According to this configuration, it is possible to uniformly generate airflows in the first extending duct and the second extending duct.

[0020] Preferably, the blower generates a negative pressure in each of the first extending duct and the second extending duct.

[0021] When the blower generates a positive pressure in each of the extending ducts, foreign matters (for example, lubricant such as oil applied to the yarn) may scatter toward the outside of the extending ducts. In this regard, in the configuration above, the blower generates a negative pressure in each of the extending ducts. It is therefore possible to prevent the scattering of the foreign matters described above.

[0022] The false-twist texturing machine of the present invention preferably includes a cooler which is included in the processing unit and includes the airflow generator and a cooling unit which communicates with the first extending duct and the second extending duct, a yarn running space in which the yarns run being formed in the cooling unit, the cooler supplying cooling air to the yarn running space through the first extending duct and the second extending duct by driving the blower.

[0023] According to the configuration, yarns can be efficiently cooled by the cooling air generated by the airflow generator.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a schematic diagram of a false-twist texturing machine of an embodiment of the present invention. FIG. 2 is a schematic diagram of the false-twist texturing machine of FIG. 1, expanded along a yarn running direction. FIG. 3 is an arrow view along line III in FIG. 1. FIG. 4 is a plan view of an airflow generator of the embodiment of the present invention. FIG. 5 is a graph showing an experimentation result of an experimentation using a first test body according to an example of the present invention and second and third test bodies according to comparative examples of the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS<Embodiment>

[0025] The following will describe a false-twist texturing machine 1 of an embodiment of the present invention, with reference to FIG. 1 to FIG. 3.

[0026] In the following description, an up-down direction is defined based on the premise that a false-twist texturing machine 1 is installed to be usable. Furthermore, with reference to a main frame 8 of the false-twist texturing machine 1, the longitudinal direction of the main frame 8 is defined as a longitudinal direction, and the width direction of the main frame 8 is defined as a width direction. The up-down direction, the longitudinal direction, and the width direction are orthogonal to each other. Furthermore, the direction in which a yarn Y runs is defined as a yarn running direction.

[0027] The false-twist texturing machine 1 includes a main frame 8, yarn supplying units 2, processing units 3, and winding units 4, as shown in FIG. 1. The yarn supplying unit 2, the processing unit 3, and the winding unit 4 are arranged on each of one side and the other side in the width direction of the main frame 8. The false-twist texturing machine 1 is structured to be symmetrical with respect to a center line C that extends in the longitudinal direction through the center of the main frame 8 in the width direction. The yarn supplying unit 2, the processing unit 3, and the winding unit 4 are provided on each of one side and the other side of the center line C in the width direction.

[0028] The following will describe the yarn supplying unit 2, the processing unit 3, and the winding unit 4 provided on one side in the width direction of the main frame 8.

[0029] The yarn supplying unit 2, the processing unit 3, and the winding unit 4 are arranged in this order from the upstream to the downstream in the yarn running direction, as shown in FIG. 2.

[0030] The yarn supplying unit 2 includes a creel stand 7. The creel stand 7 holds multiple yarn supply packages Ps, as shown in FIG. 2. Each yarn supply package Ps includes a yarn Y. The yarn Y is, for example, made of synthetic fibers (e.g., polyester), and is a multifilament yarn formed of a single filament or multiple filaments.

[0031] In the processing unit 3, as shown in FIG. 2, the following members are provided in this order from the upstream to the downstream in the yarn running direction: first feed rollers 11; twist-stopping guides 12; first heaters 13; a cooler 14; false-twisting devices 15; second feed rollers 16; interlacing devices 17; third feed rollers 18; a second heater 19; and fourth feed rollers 20. Among these members, the false-twisting devices 15, the second feed rollers 16, the interlacing devices 17, the third feed rollers 18, and the second heater 19 are mounted on the main frame 8, as shown in FIG. 1. Among the above-described members, the interlacing devices 17, the third feed rollers 18, and the second heater 19 are arranged in the up-down direction along the main frame 8, and may be shared between one side and the other side in the width direction.

[0032] As shown in FIG. 2, the first feed rollers 11 are provided to correspond to the respective yarn supply packages Ps. One first feed roller 11 unwinds a yarn Y from a corresponding yarn supply package Ps and feeds the single yarn Y to the first heater 13. Alternatively, a single first feed roller 11 may be provided to correspond to multiple yarn supply packages Ps, unwinds multiple yarns Y from the multiple yarn supply packages Ps, and feeds the yarns Y to the first heater 13.

[0033] As shown in FIG. 2, the twist-stopping guides 12 are provided to correspond to the respective yarn supply packages Ps. The twist-stopping guide 12 prevents twist of the yarn Y formed by the false-twisting device 15 from being propagated to the upstream in the yarn running direction of the twist-stopping guide 12.

[0034] As shown in FIG. 2, the first heaters 13 are provided so that one first heater 13 corresponds to two first feed rollers 11. One first heater 13 heats two yarns Y sent by the two first feed rollers 11. Alternatively, one first heater 13 may be provided to correspond to one first feed roller 11, and may heat one yarn Y sent by a single corresponding first feed roller 11.

[0035] The cooler 14 is provided to correspond to the entirety of the multiple yarn supply packages Ps, as shown in FIG. 2.

[0036] The cooler 14 is a contactless device configured to cool yarns Y heated by the first heater 13 by means of cooling wind, and includes a cooling unit 31 and an airflow generator 32 as shown in FIG. 3.

[0037] The airflow generator 32 has a first extending duct 61, a second extending duct 62, and a blower 63, as shown in FIG. 1 and FIG. 4. The first extending duct 61 and the second extending duct 62 both extend in the longitudinal direction. The details of the airflow generator 32 will be given later.

[0038] The cooling unit 31 includes multiple groups each of which consists of two cooling members 31A and 31B adjacent to each other in the longitudinal direction, as shown in FIG. 3. The groups of the cooling members are provided to be aligned in the longitudinal direction, for each of the first extending duct 61 and the second extending duct 62. In each group, the two cooling members 31A and 31B are inclined with respect to a virtual straight line A and are arranged to be symmetrical with respect to the virtual straight line A. The interval between the two cooling members 31A and 31B in the longitudinal direction in each group widens toward the downstream side in the yarn running direction. The virtual straight line A is parallel to the width direction of the extending ducts 61 and 62, and is parallel to the width direction (see FIG. 1).

[0039] As shown in FIG. 3, in each of the cooling members 31A and 31B, a yarn running space S in which one yarn Y runs is formed. The yarn running space S is connected to an intake space Ss in the corresponding extending duct 61, 62 through a slit that penetrates the wall of that extending duct.

[0040] The cooler 14 supplies cooling air to the yarn running space S by generating a negative pressure in the intake space Ss in the extending duct 61, 62 by driving the blower 63. The yarn Y running in the yarn running space S is cooled by the cooling air.

[0041] The blower 63 has an impeller 631, a motor 632 that rotates the impeller 631, an inverter device 633 that can change the rotation number of the motor 632, and a housing 634 that houses the impeller 631, the motor 632, and the inverter device 633, as shown in FIG. 3. The blower 63 generates a negative pressure in the intake space Ss by rotating the impeller 631 by the motor 632. The negative pressure refers to a pressure that is lower than the atmospheric pressure (in the present embodiment, the air pressure outside the cooler 14).

[0042] As shown in FIG. 2, the false-twisting devices 15 are provided to correspond to the respective yarn supply packages Ps. For example, the false-twisting device 15 is a known disc-friction false-twisting device or a known belt-type false-twisting device, and is configured to twist the yarn Y cooled by the cooler 14.

[0043] The yarn Y is untwisted on the downstream side of the false-twisting device 15 in the yarn running direction. However, the yarn Y is maintained to be wavy in shape on account of the thermal setting in the first heater 13 (i.e., the crimp contraction of the yarn Y is maintained).

[0044] As shown in FIG. 2, the second feed rollers 16 are provided to correspond to the respective yarn supply packages Ps. The second feed roller 16 sends the yarn Y twisted by the false-twisting device 15 to the interlacing device 17.

[0045] The conveyance speed of conveying the yarn Y by the second feed roller 16 is higher than the conveyance speed of conveying the yarn Y by the first feed roller 11. The yarn Y is therefore drawn between the first feed roller feed roller 11 and the second feed roller 16.

[0046] As shown in FIG. 2, the interlacing devices 17 are provided to correspond to the respective yarn supply packages Ps. Each interlacing device 17 interlaces the yarn Y sent by the second feed roller 16. The interlacing device 17 has, e.g., a known interlace nozzle configured to interlace the yarn Y by means of an airflow.

[0047] As shown in FIG. 2, the third feed rollers 18 are provided to correspond to the respective yarn supply packages Ps. One third feed roller 18 sends one yarn Y interlaced by a corresponding interlacing device 17 to the second heater 19. Alternatively, one third feed roller 18 may be provided to correspond to multiple interlacing devices 17, and multiple yarns Y interlaced by the multiple interlacing devices 17 may be sent to the second heater 19.

[0048] The conveyance speed of conveying the yarn Y by the third feed roller 18 is lower than the conveyance speed of conveying the yarn Y by the second feed roller 16. The yarn Y is therefore relaxed between the second feed roller 16 and the third feed roller 18.

[0049] The second heater 19 is provided to correspond to the entirety of the multiple yarn supply packages Ps, as shown in FIG. 2. The second heater 19 heats the yarn Y sent from the third feed roller 18.

[0050] As shown in FIG. 2, the fourth feed rollers 20 are provided to correspond to the respective yarn supply packages Ps. One fourth feed roller 20 feeds one yarn Y heated by a corresponding second heater 19 to the winding device 21. Alternatively, one fourth feed roller 20 may feed multiple adjacent yarns Y to the winding device 21.

[0051] The conveyance speed of conveying the yarn Y by the fourth feed roller 20 is lower than the conveyance speed of conveying the yarn Y by the third feed roller 18. The yarn Y is therefore relaxed between the third feed roller 18 and the fourth feed roller 20.

[0052] The winding unit 4 includes a plurality of winding devices 21 provided to correspond to the respective yarn supply packages Ps, as shown in FIG. 2.

[0053] Each winding device 21 includes a fulcrum guide 41, a traverse device 42, and a cradle 43.

[0054] The fulcrum guide 41 is a guide functioning as a fulcrum when the yarn Y is traversed by the traverse device 42. The traverse device 42 includes a traverse guide 45, and the yarn Y is traversed by the traverse guide 45. The cradle 43 supports the winding bobbin Bw to be rotatable. A contact roller 46 is provided in the vicinity of the cradle 43. The contact roller 46 is configured to make contact with a surface of a wound package Pw so as to apply a contact pressure to the surface of the wound package Pw.

[0055] Each winding device 21 forms a wound package Pw by winding the yarn Y sent by the fourth feed roller 20 onto the winding bobbin Bw.

[0056] The winding devices 21 are attached to the winding base 9, as shown in FIG. 1. The winding base 9 extends in the longitudinal direction to be parallel to the main frame 8. The length of the winding base 9 in the longitudinal direction is substantially identical to the length of the main frame 8 in the longitudinal direction. A working space Sw is provided between the main frame 8 and the winding base 9 in the width direction to allow an operator to perform operations such as yarn threading.

[0057] The following will detail the airflow generator 32 with reference to FIG. 4.

[0058] The airflow generator 32 is symmetrical in shape with respect to a center line C that extends in the longitudinal direction and passes through the center in the width direction of the main frame 8 (see FIG. 1), as shown in FIG. 4.

[0059] The airflow generator 32 includes a first extending duct 61 and a first inclined duct 71 which are arranged on one side in the width direction of the center line C, a second extending duct 62 and a second inclined duct 72 arranged on the other side in the width direction of the center line C, and an intervening duct 73 and a blower 63 arranged on the center line C.

[0060] The ducts 61, 62, 71, 72, and 73 are square cylindrical in shape, and have internal spaces that are substantially identical in length in the up-down direction. The ducts 61, 62, 71, and 72 are substantially identical in terms of the width of the passage and the cross-sectional area of the passage.

[0061] The first extending duct 61 and the second extending duct 62 extend along the longitudinal direction and are aligned in the width direction.

[0062] The blower 63 (more specifically, the housing 634 shown in FIG. 3) is connected to one end 61x in the longitudinal direction (an end portion on one side in the longitudinal direction) of the first extending duct 61 via the inclined duct 71 and the intervening duct 73. Furthermore, the blower 63 (more specifically, the housing 634 shown in FIG. 3) is connected to one end 62x in the longitudinal direction (an end portion on one side in the longitudinal direction) of the second extending duct 62 via the inclined duct 72 and the intervening duct 73.

[0063] The first inclined duct 71 is arranged between the first extending duct 61 and the blower 63, more specifically between the first extending duct 61 and the intervening duct 73.

[0064] The second inclined duct 72 is arranged between the second extending duct 62 and the blower 63, more specifically between the second extending duct 62 and the intervening duct 73.

[0065] The intervening duct 73 is interposed between the first inclined duct 71 and the blower 63 and between the second inclined duct 72 and the blower 63.

[0066] The blower 63 and the intervening duct 73 are provided along the center line C and are aligned in the longitudinal direction.

[0067] The first inclined duct 71 is inclined relative to the longitudinal direction such that, as it extends from one end 61x of the first extending duct 61 toward the blower 63 in the longitudinal direction, it shifts toward the second extending duct 62 in the width direction. In other words, the first inclined duct 71 is inclined downward and leftward in the sheet of FIG. 4.

[0068] The second inclined duct 72 is inclined relative to the longitudinal direction such that, as it extends from one end 62x of the second extending duct 62 toward the blower 63 in the longitudinal direction, it shifts toward the first extending duct 61 in the width direction. In other words, the second inclined duct 72 is inclined upward and leftward in the sheet of FIG. 4.

[0069] As shown in FIG. 4, when viewed in the up-down direction, an angle α1 which is formed between the center line X1 of the first extending duct 61 and the center line X2 of the first inclined duct 71 and is on the side of facing a space V (i.e., a space between the first extending duct 61 and the second extending duct 62 spaced apart from each other in the width direction) is an obtuse angle, and an angle α2 which is formed between the center line X3 of the second extending duct 62 and the center line X4 of the second inclined duct 72 and is on the side of facing the space V is an obtuse angle, too.

[0070] An angle β1 which is formed between the center line X2 of the first inclined duct 71 and the center line X5 of the intervening duct 73 and is on the side of facing the space V is an obtuse angle, and an angle β2 which is formed between the center line X3 of the second inclined duct 72 and the center line X5 of the intervening duct 73 and is on the side of facing the space V is an obtuse angle, too.

[0071] Each of the angles α1, α2, β1, and β2 is, for example, 120°. While FIG. 4 is a plan view and the angles α1, α2, β1, and β2 are shown in two dimensions, the above configuration also holds in three dimensions. For example, the blower 63 may be positioned slightly above each of the ducts 61, 62, 71, and 72. The angles α1, α2, β1, and β2 are defined by planes that pass through the center lines X1 to X5 of the ducts 61, 62, 71, 72, and 73 and are parallel to the side walls of the ducts.

[0072] The intervening duct 73 has a protruding portion 731 that protrudes toward the blower 63 (that is, leftward in the sheet of FIG. 4) from an inner surface 73s that is on the opposite side of the blower 63 in the longitudinal direction.

[0073] The protruding portion 731 has a triangular shape in plan view and is provided over the entirety of the intervening duct 73 in the up-down direction.

[0074] The protruding portion 731 has a first inclined surface 731a which is provided on the first extending duct 61 side in the width direction. The first inclined surface 731a is inclined relative to the longitudinal direction such that, as it extends from the inner surface 73s toward the blower 63 in the longitudinal direction, it shifts toward the second extending duct 62 in the width direction. In other words, the first inclined surface 731a is inclined downward and leftward in the sheet of FIG. 4. The protruding portion 731 has a second inclined surface 731b which is provided on the second extending duct 62 side in the width direction. The second inclined surface 731b is inclined relative to the longitudinal direction such that, as it extends from the inner surface 73s toward the blower 63 in the longitudinal direction, it shifts toward the first extending duct 61 in the width direction. In other words, the second inclined surface 731b is inclined upward and leftward in the sheet of FIG. 4.

[0075] The leading end of the protruding portion 731, that is, the intersection between the first inclined surface 731a and the second inclined surface 731b is located close to the blower 63 in the longitudinal direction as compared to an intersection N. The intersection N is the intersection between a first virtual straight line L1 extending along an inner surface 71s of the first inclined duct 71, which is on the opposite side of the blower 63 in the longitudinal direction, and a second virtual straight line L2 extending along an inner surface 72s of the second inclined duct 72, which is on the opposite side of the blower 63 in the longitudinal direction. The protruding portion 731 protrudes toward the blower 63 as compared to the intersection N, in a plane parallel to the longitudinal direction and the width direction as shown in FIG. 4.

[0076] The protruding portion 731 may or may not be hollow inside. For example, the protruding portion 731 that is hollow inside may be formed by combining two plates.

[0077] The airflows indicated by thick arrows in FIG. 4 are generated in the ducts 61, 62, 71, 72, and 73 due to the operation of the blower 63. The airflow from the first extending duct 61 toward the blower 63 via the first inclined duct 71 and the airflow from the second extending duct 62 toward the blower 63 via the second inclined duct 72 are guided by the inclined surfaces 731a and 731b of the protruding portion 731 in the intervening duct 73, are merged in the vicinity of the leading end of the protruding portion 731, and flow into the blower 63.

[0078] As described above, according to the present embodiment, the blower 63 is connected to one ends 61x and 62x in the longitudinal direction of the first extending duct 61 and the second extending duct 62 which are aligned in the width direction (see FIG. 4). In this case, as compared to a case where a blower 63 is connected to one end in the longitudinal direction of one extending duct (a long extending duct formed by connecting the first extending duct 61 with the second extending duct 62), the pressure loss of the airflows generated in the ducts 61 and 62 is reduced, with the result that sufficient amounts of airflows are generated in the ducts 61 and 62. In other words, according to the present embodiment, in the airflow generator 32, it is possible to reduce pressure loss and achieve energy saving.

[0079] In addition to the above, according to the present embodiment, the intervening duct 73 has a protruding portion 731 (see FIG. 4). When the blower 63 generates a negative pressure in each of the extending ducts 61 and 62, the airflow from the first extending duct 61 toward the blower 63 and the airflow from the second extending duct 62 toward the blower 63 may collide in the intervening duct 73, and a turbulent flow may be generated. In this regard, in the present embodiment, as shown in FIG. 4, the turbulent flow is suppressed as the airflows collide the protruding portion 731 before colliding each other. By suppressing the turbulent flow in this way, the airflow generator 32 can further suppress the pressure loss and further improve the energy saving.

[0080] The angles α1 and α2 are both obtuse angles (see FIG. 4). When the angles α1 and α2 are 90° or less, significant pressure loss occurs in the airflow between each of the extending ducts 61 and 62 and each of the inclined ducts 71 and 72. In this regard, according to the configuration above, because the angles α1 and α2 are obtuse, the pressure loss is small, and hence air flows smoothly between each of the extending ducts 61 and 62 and each of the inclined ducts 71 and 72. Therefore, according to this configuration, the airflow generator 32 can further suppress the pressure loss and further improve the energy saving.

[0081] The angles β1 and β2 are both obtuse (see FIG. 4). When the angles β1 and β2 are 90° or less, significant pressure loss occurs in the airflow between each of the inclined ducts 71 and 72 and the intervening duct 73. In this configuration, because the angles β1 and β2 are obtuse, the pressure loss is small, and hence air flows smoothly between each of the inclined ducts 71 and 72 and the intervening duct 73. Therefore, according to the configuration described above, the airflow generator 32 can further suppress the pressure loss and further improves the energy saving.

[0082] The protruding portion 731 has inclined surfaces 731a and 731b (see FIG. 4). According to this configuration, by generating an airflow along each of the inclined surfaces 731a and 731b of the protruding portion 731 in the intervening duct 73, the above-described effect of suppressing the turbulent flow can be obtained more reliably.

[0083] The protruding portion 731 protrudes toward the blower 63 as compared to the intersection N (see FIG. 4). With this configuration, the above-described effect of suppressing the turbulent flow can be obtained more reliably.

[0084] The protruding portion 731 is provided over the entirety of the intervening duct 73 in the up-down direction. With this configuration, the above-described effect of suppressing the turbulent flow can be obtained over the entirety of the intervening duct 73 in the up-down direction.

[0085] The airflow generator 32 is symmetrical in shape (see FIG. 4) with respect to the center line C that extends in the longitudinal direction and passes through the center in the width direction of the main frame 8 (see FIG. 1). According to this configuration, it is possible to uniformly generate airflows in the first extending duct 61 and the second extending duct 62.

[0086] The blower 63 generates a negative pressure in each of the extending ducts 61 and 62. When the blower generates a positive pressure in each of the extending ducts 61 and 62, foreign matters (for example, lubricant such as oil applied to the yarn Y) may scatter toward the outside of the extending ducts 61 and 62. In this regard, in the configuration above, the blower 63 generates a negative pressure in each of the extending ducts 61 and 62. It is therefore possible to prevent the scattering of the foreign matters described above.

[0087] The false-twist texturing machine 1 is provided with the cooler 14 included in the processing unit 3. The cooler 14 includes the airflow generator 32 and the cooling unit 31 in which the yarn running space S which communicates with the extending ducts 61 and 62 and where the yarns Y run is formed. The cooler 14 supplies cooling air to the yarn running space S though the extending duct 61 and 62 by driving the blower 63. According to the configuration, the yarns Y can be efficiently cooled by the cooling air generated by the airflow generator 32.<Example>

[0088] The inventors of the subject application conducted experiments of measuring air speed in the vicinity of an entrance of the yarn running space S (see FIG. 3) at different frequencies of the motor 632 (see FIG. 3) of the blower 63, by using: a first test body that is a test body of the cooler 14 of the embodiment above; a second test body that is a test body in which, in the cooler 14 of the embodiment above, the first extending duct 61 and the second extending duct 62 are connected in the longitudinal direction to form a single extending duct, and the blower 63 is connected to one end in the longitudinal direction of the single extending duct; and a third test body that is a test body in which, in the cooler 14 of the embodiment above, the blower 63 is connected to one end in the longitudinal direction of each of the first extending duct 61 and the second extending duct 62. The greater the air speed is, the higher the cooling efficiency is.

[0089] The first test body is an example of the present invention, while the second test body and the third test body are comparative examples of the present invention.

[0090] FIG. 5 shows experimentation results. In FIG. 5, the vertical axis shows a time-averaged air speed obtained from a sensor provided in the vicinity of the entrance of the yarn running space S (see FIG. 3) in each test body. In FIG. 5, the horizontal axis indicates the frequency of the motor 632 of the blower 63 (see FIG. 3). By changing the rotation number of the motor 632 using the inverter device 633, the experimentations were conducted at different frequencies of the motor 632.

[0091] In FIG. 5, "first test body I" is the first extending duct 61 included in the first test body, and "first test body II" is the second extending duct 62 included in the first test body. In other words, in the first test body, the air speed and the frequency were measured for each of the first extending duct 61 and the second extending duct 62. In the third test body, the air speed and the frequency were measured for each of the first extending duct 61 and the second extending duct 62. FIG. 5 shows the average values.

[0092] FIG. 5 shows that, especially in a frequency range of 30Hz and higher, the air speed was high in the first test bodies I and II as compared to the second test body and the third test body. In regard to the second test body, it is considered that the air speed was low because, as the two extending ducts 61 and 62 were combined to form one extending duct, the length of the duct (passage length) was long and the pressure loss was large.

[0093] FIG. 5 shows that, between the first test body I of the first extending duct 61 and the first test body II of the second extending duct 62, the air speed corresponding to each frequency was different. This difference, however, is considered to be reduced by appropriately adjusting the structure of the junction (e.g., the inclined duct 71, 72) between each of the extending ducts 61 and 62 and the blower 63.<Modifications>

[0094] A preferred embodiment of the present invention has been described. It should be noted that the present invention is not limited to the above-described embodiment, and various changes, substitutions, and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

[0095] For example, in order to further enhance the cooling efficiency of the cooler, the configuration described in Japanese Laid-Open Patent Publication No. 2023-012097 (the configuration of the cooling unit, the configuration of the slits formed in each extending duct, etc.) may be adopted.

[0096] The application of the airflow generator according to the present invention is not limited to the cooler. The airflow generator may be employed in, for example, a suction device configured to suck oil adhered to a yarn.

[0097] The blower may generate a positive pressure in each of the first extending duct and the second extending duct. In this case, by providing a protruding portion, the airflow supplied from the blower to the intervening duct can be smoothly branched to the extending ducts by the protruding portion.

[0098] The first extending duct and the second extending duct may extend in a direction slightly inclined relative to the longitudinal direction of the main frame, as long as they extend along the longitudinal direction. Furthermore, the first extending duct and the second extending duct may not be straight along the longitudinal direction of the main frame, and may have a curved or bent portion. Furthermore, the direction in which the first extending duct extends and the direction in which the second extending duct extends may not be identical, and may intersect with each other.

[0099] The ducts (the first extending duct, the second extending duct, the first inclined duct, the second inclined duct, and the intervening duct) may not be square cylindrical in shape, and may be, for example, circular cylindrical in shape.

[0100] The protruding portion is triangular in shape in plan view (see FIG. 4) in the above-described embodiment, but the protruding portion is not limited to this shape. For example, the protruding portion may be semicircular or rectangular in shape in plan view. When the protruding portion is rectangular in shape in plan view, both a side surface on the first extending duct side and a side face on the second extending duct side of the protruding portion may both extend along the longitudinal direction.

Examples

Embodiment Construction

[0025]The following will describe a false-twist texturing machine 1 of an embodiment of the present invention, with reference to FIG. 1 to FIG. 3.

[0026]In the following description, an up-down direction is defined based on the premise that a false-twist texturing machine 1 is installed to be usable. Furthermore, with reference to a main frame 8 of the false-twist texturing machine 1, the longitudinal direction of the main frame 8 is defined as a longitudinal direction, and the width direction of the main frame 8 is defined as a width direction. The up-down direction, the longitudinal direction, and the width direction are orthogonal to each other. Furthermore, the direction in which a yarn Y runs is defined as a yarn running direction.

[0027]The false-twist texturing machine 1 includes a main frame 8, yarn supplying units 2, processing units 3, and winding units 4, as shown in FIG. 1. The yarn supplying unit 2, the processing unit 3, and the winding unit 4 are arranged on each of one...

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a false-twist texturing machine provided with an airflow generator.

[0002] Patent Literature 1 (Japanese Laid-Open Patent Publication No. 2023-012097) discloses a cooler (airflow generator) applied to a false-twist texturing machine, which includes a duct in which an in-duct space is formed and a negative pressure generator (blower) which is provided at one end or the other end in the longitudinal direction of the duct and is configured to generate negative pressure in the in-duct space. The duct and the negative pressure generator are arranged to be left-right symmetrical in the width direction of a main frame of the false-twist texturing machine, relative to the main frame.SUMMARY OF THE INVENTION

[0003] In Patent Literature 1, a negative pressure generator (blower) is provided for each of the two ducts which are arranged on one side and the other side in the width direction of the main frame, respectively. In this case, in each duct, a significant pressure loss occurs in the airflow. Due to this, it is impossible to generate a sufficient amount of airflow reaching the other end, which is opposite to one end in the longitudinal direction where the blower is provided. As a result, it becomes necessary to increase the drive force of the blower in order to generate a sufficient amount of airflow throughout each duct in the longitudinal direction. It is therefore impossible to achieve energy saving. This issue becomes more pronounced as the length of the duct increases in the longitudinal direction.

[0004] An object of the present invention is to provide a false-twist texturing machine which can reduce pressure loss in an airflow generator in order to achieve energy saving.

[0005] A false-twist texturing machine of the present invention includes: a main frame; a processing unit which is provided on each of one side and the other side in a width direction of the main frame and is configured to process yarns aligned in a longitudinal direction of the main frame; and an airflow generator which is included in the processing unit, the airflow generator including: a first extending duct which is provided on the one side in the width direction of the main frame and extends along the longitudinal direction; a second extending duct which is provided on the other side in the width direction of the main frame and extends along the longitudinal direction; a blower which generates an airflow in the longitudinal direction; and an intervening duct which is provided between the first extending duct and the blower and between the second extending duct and the blower and is aligned with the blower in the longitudinal direction, the first extending duct and the second extending duct being aligned in the width direction, one end in the longitudinal direction of the first extending duct and one end in the longitudinal direction of the second extending duct being connected to the blower, and the intervening duct having a protruding portion which protrudes toward the blower from an inner surface that is on the opposite side of the blower in the longitudinal direction.

[0006] According to this aspect of the present invention, the blower is connected to one ends in the longitudinal direction of the first extending duct and the second extending duct which are aligned in the width direction. In this case, as compared to a case where a blower is connected to one end in the longitudinal direction of one extending duct (a long extending duct formed by connecting the first extending duct with the second extending duct), the pressure loss of the airflows generated in the ducts is reduced, with the result that sufficient amounts of airflows are generated in the ducts. That is, according to the aspect of the present invention, in the airflow generator, it is possible to reduce pressure loss and achieve energy savings.

[0007] Furthermore, according to the aspect of the present invention, the intervening duct has the protruding portion. When the blower generates a negative pressure in each of the extending ducts, the airflow from the first extending duct toward the blower and the airflow from the second extending duct toward the blower may collide in the intervening duct, and a turbulent flow may be generated. In this regard, according to the aspect of the present invention, the turbulent flow is suppressed as the airflows collide the protruding portion before colliding each other. When the blower generates a positive pressure in each extending duct, the protruding portion makes it possible to smoothly branch the airflow supplied from the blower to the intervening duct toward each extending duct. By suppressing the turbulent flow or smoothing the flow of the airflow in this way, the airflow generator can further suppress the pressure loss and further improve the energy saving.

[0008] Preferably, the airflow generator further includes: a first inclined duct which is provided between the first extending duct and the blower; and a second inclined duct which is provided between the second extending duct and the blower, the first inclined duct is inclined relative to the longitudinal direction such that, as it extends from the one end of the first extending duct toward from the blower in the longitudinal direction, it shifts toward the second extending duct in the width direction, the second inclined duct is inclined relative to the longitudinal direction such that, as it extends from the one end of the second extending duct toward the blower in the longitudinal direction, it shifts toward the first extending duct in the width direction, and an angle which is formed between the center line of the first extending duct and the center line of the first inclined duct and is on the side of facing a space between the first extending duct and the second extending duct spaced apart from each other in the width direction is an obtuse angle, and an angle which is formed between the center line of the second extending duct and the center line of the second inclined duct and is on the side of facing the space is an obtuse angle.

[0009] When these angles are 90° or less, significant pressure loss occurs in the airflow between each of the extending ducts and each of the inclined ducts. In this regard, according to the configuration above, because the angles are obtuse, the pressure loss is small, and hence air flows smoothly between each of the extending ducts and each of the inclined ducts. Therefore, according to the configuration described above, the airflow generator can further suppress the pressure loss and further improves the energy saving.

[0010] Preferably, the airflow generator further includes an intervening duct which is provided between the first inclined duct and the blower and between the second inclined duct and the blower, and an angle which is formed between the center line of the first inclined duct and the center line of the intervening duct and is on the side of facing the space is an obtuse angle, and an angle which is formed between the center line of the second inclined duct and the center line of the intervening duct and is on the side of facing the space is an obtuse angle.

[0011] When these angles are 90° or less, significant pressure loss occurs in the airflow between each of the inclined ducts and the intervening duct. In this regard, according to the configuration above, because the angles are obtuse, the pressure loss is small, and hence air flows smoothly between each of the inclined ducts and the intervening duct. Therefore, according to the configuration described above, the airflow generator can further suppress the pressure loss and further improves the energy saving.

[0012] Preferably, the protruding portion includes: a first inclined surface, provided on the first extending duct side in the width direction, is inclined relative to the longitudinal direction such that, as it extends from the inner surface toward the blower in the longitudinal direction, it shifts toward the second extending duct in the width direction; and a second inclined surface, provided on the second extending duct side in the width direction, is inclined relative to the longitudinal direction such that, as it extends from the inner surface toward the blower in the longitudinal direction, it shifts toward the first extending duct in the width direction.

[0013] According to this configuration, by generating an airflow along each of the inclined surfaces of the protruding portion in the intervening duct, the above-described effect of suppressing the turbulent flow and smoothly branching the airflow can be obtained more reliably.

[0014] Preferably, the airflow generator further includes: a first inclined duct which is provided between the first extending duct and the intervening duct; and a second inclined duct which is provided between the second extending duct and the intervening duct, the first inclined duct is inclined relative to the longitudinal direction such that, as it extends from the one end of the first extending duct toward the intervening duct in the longitudinal direction, it shifts toward the second extending duct in the width direction, the second inclined duct is inclined relative to the longitudinal direction such that, as it extends from the one end of the second extending duct toward the intervening duct in the longitudinal direction, it shifts toward the first extending duct in the width direction, and in a plane in parallel to the longitudinal direction and the width direction, the protruding portion protrudes toward the blower as compared to an intersection between a first virtual straight line which extends along an inner surface of the first inclined duct, which is on the opposite side of the blower in the longitudinal direction, and a second virtual straight line which extends along an inner surface of the second inclined duct, which is on the opposite side of the blower in the longitudinal direction.

[0015] According to this configuration, as the protruding portion protrudes toward the blower as compared to the intersection, the above-described effect of suppressing the turbulent flow and smoothly branching the airflow can be obtained more reliably.

[0016] Preferably, the protruding portion is provided over entirety of the intervening duct in an up-down direction that is orthogonal to both the width direction and the longitudinal direction.

[0017] With this configuration, the above-described effect of suppressing the turbulent flow and smoothly branching the airflow can be obtained over the entirety of the intervening duct in the up-down direction.

[0018] Preferably, the airflow generator is symmetrical in shape with respect to a center line that extends in the longitudinal direction and passes through the center in the width direction of the main frame.

[0019] According to this configuration, it is possible to uniformly generate airflows in the first extending duct and the second extending duct.

[0020] Preferably, the blower generates a negative pressure in each of the first extending duct and the second extending duct.

[0021] When the blower generates a positive pressure in each of the extending ducts, foreign matters (for example, lubricant such as oil applied to the yarn) may scatter toward the outside of the extending ducts. In this regard, in the configuration above, the blower generates a negative pressure in each of the extending ducts. It is therefore possible to prevent the scattering of the foreign matters described above.

[0022] The false-twist texturing machine of the present invention preferably includes a cooler which is included in the processing unit and includes the airflow generator and a cooling unit which communicates with the first extending duct and the second extending duct, a yarn running space in which the yarns run being formed in the cooling unit, the cooler supplying cooling air to the yarn running space through the first extending duct and the second extending duct by driving the blower.

[0023] According to the configuration, yarns can be efficiently cooled by the cooling air generated by the airflow generator.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a schematic diagram of a false-twist texturing machine of an embodiment of the present invention. FIG. 2 is a schematic diagram of the false-twist texturing machine of FIG. 1, expanded along a yarn running direction. FIG. 3 is an arrow view along line III in FIG. 1. FIG. 4 is a plan view of an airflow generator of the embodiment of the present invention. FIG. 5 is a graph showing an experimentation result of an experimentation using a first test body according to an example of the present invention and second and third test bodies according to comparative examples of the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS<Embodiment>

[0025] The following will describe a false-twist texturing machine 1 of an embodiment of the present invention, with reference to FIG. 1 to FIG. 3.

[0026] In the following description, an up-down direction is defined based on the premise that a false-twist texturing machine 1 is installed to be usable. Furthermore, with reference to a main frame 8 of the false-twist texturing machine 1, the longitudinal direction of the main frame 8 is defined as a longitudinal direction, and the width direction of the main frame 8 is defined as a width direction. The up-down direction, the longitudinal direction, and the width direction are orthogonal to each other. Furthermore, the direction in which a yarn Y runs is defined as a yarn running direction.

[0027] The false-twist texturing machine 1 includes a main frame 8, yarn supplying units 2, processing units 3, and winding units 4, as shown in FIG. 1. The yarn supplying unit 2, the processing unit 3, and the winding unit 4 are arranged on each of one side and the other side in the width direction of the main frame 8. The false-twist texturing machine 1 is structured to be symmetrical with respect to a center line C that extends in the longitudinal direction through the center of the main frame 8 in the width direction. The yarn supplying unit 2, the processing unit 3, and the winding unit 4 are provided on each of one side and the other side of the center line C in the width direction.

[0028] The following will describe the yarn supplying unit 2, the processing unit 3, and the winding unit 4 provided on one side in the width direction of the main frame 8.

[0029] The yarn supplying unit 2, the processing unit 3, and the winding unit 4 are arranged in this order from the upstream to the downstream in the yarn running direction, as shown in FIG. 2.

[0030] The yarn supplying unit 2 includes a creel stand 7. The creel stand 7 holds multiple yarn supply packages Ps, as shown in FIG. 2. Each yarn supply package Ps includes a yarn Y. The yarn Y is, for example, made of synthetic fibers (e.g., polyester), and is a multifilament yarn formed of a single filament or multiple filaments.

[0031] In the processing unit 3, as shown in FIG. 2, the following members are provided in this order from the upstream to the downstream in the yarn running direction: first feed rollers 11; twist-stopping guides 12; first heaters 13; a cooler 14; false-twisting devices 15; second feed rollers 16; interlacing devices 17; third feed rollers 18; a second heater 19; and fourth feed rollers 20. Among these members, the false-twisting devices 15, the second feed rollers 16, the interlacing devices 17, the third feed rollers 18, and the second heater 19 are mounted on the main frame 8, as shown in FIG. 1. Among the above-described members, the interlacing devices 17, the third feed rollers 18, and the second heater 19 are arranged in the up-down direction along the main frame 8, and may be shared between one side and the other side in the width direction.

[0032] As shown in FIG. 2, the first feed rollers 11 are provided to correspond to the respective yarn supply packages Ps. One first feed roller 11 unwinds a yarn Y from a corresponding yarn supply package Ps and feeds the single yarn Y to the first heater 13. Alternatively, a single first feed roller 11 may be provided to correspond to multiple yarn supply packages Ps, unwinds multiple yarns Y from the multiple yarn supply packages Ps, and feeds the yarns Y to the first heater 13.

[0033] As shown in FIG. 2, the twist-stopping guides 12 are provided to correspond to the respective yarn supply packages Ps. The twist-stopping guide 12 prevents twist of the yarn Y formed by the false-twisting device 15 from being propagated to the upstream in the yarn running direction of the twist-stopping guide 12.

[0034] As shown in FIG. 2, the first heaters 13 are provided so that one first heater 13 corresponds to two first feed rollers 11. One first heater 13 heats two yarns Y sent by the two first feed rollers 11. Alternatively, one first heater 13 may be provided to correspond to one first feed roller 11, and may heat one yarn Y sent by a single corresponding first feed roller 11.

[0035] The cooler 14 is provided to correspond to the entirety of the multiple yarn supply packages Ps, as shown in FIG. 2.

[0036] The cooler 14 is a contactless device configured to cool yarns Y heated by the first heater 13 by means of cooling wind, and includes a cooling unit 31 and an airflow generator 32 as shown in FIG. 3.

[0037] The airflow generator 32 has a first extending duct 61, a second extending duct 62, and a blower 63, as shown in FIG. 1 and FIG. 4. The first extending duct 61 and the second extending duct 62 both extend in the longitudinal direction. The details of the airflow generator 32 will be given later.

[0038] The cooling unit 31 includes multiple groups each of which consists of two cooling members 31A and 31B adjacent to each other in the longitudinal direction, as shown in FIG. 3. The groups of the cooling members are provided to be aligned in the longitudinal direction, for each of the first extending duct 61 and the second extending duct 62. In each group, the two cooling members 31A and 31B are inclined with respect to a virtual straight line A and are arranged to be symmetrical with respect to the virtual straight line A. The interval between the two cooling members 31A and 31B in the longitudinal direction in each group widens toward the downstream side in the yarn running direction. The virtual straight line A is parallel to the width direction of the extending ducts 61 and 62, and is parallel to the width direction (see FIG. 1).

[0039] As shown in FIG. 3, in each of the cooling members 31A and 31B, a yarn running space S in which one yarn Y runs is formed. The yarn running space S is connected to an intake space Ss in the corresponding extending duct 61, 62 through a slit that penetrates the wall of that extending duct.

[0040] The cooler 14 supplies cooling air to the yarn running space S by generating a negative pressure in the intake space Ss in the extending duct 61, 62 by driving the blower 63. The yarn Y running in the yarn running space S is cooled by the cooling air.

[0041] The blower 63 has an impeller 631, a motor 632 that rotates the impeller 631, an inverter device 633 that can change the rotation number of the motor 632, and a housing 634 that houses the impeller 631, the motor 632, and the inverter device 633, as shown in FIG. 3. The blower 63 generates a negative pressure in the intake space Ss by rotating the impeller 631 by the motor 632. The negative pressure refers to a pressure that is lower than the atmospheric pressure (in the present embodiment, the air pressure outside the cooler 14).

[0042] As shown in FIG. 2, the false-twisting devices 15 are provided to correspond to the respective yarn supply packages Ps. For example, the false-twisting device 15 is a known disc-friction false-twisting device or a known belt-type false-twisting device, and is configured to twist the yarn Y cooled by the cooler 14.

[0043] The yarn Y is untwisted on the downstream side of the false-twisting device 15 in the yarn running direction. However, the yarn Y is maintained to be wavy in shape on account of the thermal setting in the first heater 13 (i.e., the crimp contraction of the yarn Y is maintained).

[0044] As shown in FIG. 2, the second feed rollers 16 are provided to correspond to the respective yarn supply packages Ps. The second feed roller 16 sends the yarn Y twisted by the false-twisting device 15 to the interlacing device 17.

[0045] The conveyance speed of conveying the yarn Y by the second feed roller 16 is higher than the conveyance speed of conveying the yarn Y by the first feed roller 11. The yarn Y is therefore drawn between the first feed roller feed roller 11 and the second feed roller 16.

[0046] As shown in FIG. 2, the interlacing devices 17 are provided to correspond to the respective yarn supply packages Ps. Each interlacing device 17 interlaces the yarn Y sent by the second feed roller 16. The interlacing device 17 has, e.g., a known interlace nozzle configured to interlace the yarn Y by means of an airflow.

[0047] As shown in FIG. 2, the third feed rollers 18 are provided to correspond to the respective yarn supply packages Ps. One third feed roller 18 sends one yarn Y interlaced by a corresponding interlacing device 17 to the second heater 19. Alternatively, one third feed roller 18 may be provided to correspond to multiple interlacing devices 17, and multiple yarns Y interlaced by the multiple interlacing devices 17 may be sent to the second heater 19.

[0048] The conveyance speed of conveying the yarn Y by the third feed roller 18 is lower than the conveyance speed of conveying the yarn Y by the second feed roller 16. The yarn Y is therefore relaxed between the second feed roller 16 and the third feed roller 18.

[0049] The second heater 19 is provided to correspond to the entirety of the multiple yarn supply packages Ps, as shown in FIG. 2. The second heater 19 heats the yarn Y sent from the third feed roller 18.

[0050] As shown in FIG. 2, the fourth feed rollers 20 are provided to correspond to the respective yarn supply packages Ps. One fourth feed roller 20 feeds one yarn Y heated by a corresponding second heater 19 to the winding device 21. Alternatively, one fourth feed roller 20 may feed multiple adjacent yarns Y to the winding device 21.

[0051] The conveyance speed of conveying the yarn Y by the fourth feed roller 20 is lower than the conveyance speed of conveying the yarn Y by the third feed roller 18. The yarn Y is therefore relaxed between the third feed roller 18 and the fourth feed roller 20.

[0052] The winding unit 4 includes a plurality of winding devices 21 provided to correspond to the respective yarn supply packages Ps, as shown in FIG. 2.

[0053] Each winding device 21 includes a fulcrum guide 41, a traverse device 42, and a cradle 43.

[0054] The fulcrum guide 41 is a guide functioning as a fulcrum when the yarn Y is traversed by the traverse device 42. The traverse device 42 includes a traverse guide 45, and the yarn Y is traversed by the traverse guide 45. The cradle 43 supports the winding bobbin Bw to be rotatable. A contact roller 46 is provided in the vicinity of the cradle 43. The contact roller 46 is configured to make contact with a surface of a wound package Pw so as to apply a contact pressure to the surface of the wound package Pw.

[0055] Each winding device 21 forms a wound package Pw by winding the yarn Y sent by the fourth feed roller 20 onto the winding bobbin Bw.

[0056] The winding devices 21 are attached to the winding base 9, as shown in FIG. 1. The winding base 9 extends in the longitudinal direction to be parallel to the main frame 8. The length of the winding base 9 in the longitudinal direction is substantially identical to the length of the main frame 8 in the longitudinal direction. A working space Sw is provided between the main frame 8 and the winding base 9 in the width direction to allow an operator to perform operations such as yarn threading.

[0057] The following will detail the airflow generator 32 with reference to FIG. 4.

[0058] The airflow generator 32 is symmetrical in shape with respect to a center line C that extends in the longitudinal direction and passes through the center in the width direction of the main frame 8 (see FIG. 1), as shown in FIG. 4.

[0059] The airflow generator 32 includes a first extending duct 61 and a first inclined duct 71 which are arranged on one side in the width direction of the center line C, a second extending duct 62 and a second inclined duct 72 arranged on the other side in the width direction of the center line C, and an intervening duct 73 and a blower 63 arranged on the center line C.

[0060] The ducts 61, 62, 71, 72, and 73 are square cylindrical in shape, and have internal spaces that are substantially identical in length in the up-down direction. The ducts 61, 62, 71, and 72 are substantially identical in terms of the width of the passage and the cross-sectional area of the passage.

[0061] The first extending duct 61 and the second extending duct 62 extend along the longitudinal direction and are aligned in the width direction.

[0062] The blower 63 (more specifically, the housing 634 shown in FIG. 3) is connected to one end 61x in the longitudinal direction (an end portion on one side in the longitudinal direction) of the first extending duct 61 via the inclined duct 71 and the intervening duct 73. Furthermore, the blower 63 (more specifically, the housing 634 shown in FIG. 3) is connected to one end 62x in the longitudinal direction (an end portion on one side in the longitudinal direction) of the second extending duct 62 via the inclined duct 72 and the intervening duct 73.

[0063] The first inclined duct 71 is arranged between the first extending duct 61 and the blower 63, more specifically between the first extending duct 61 and the intervening duct 73.

[0064] The second inclined duct 72 is arranged between the second extending duct 62 and the blower 63, more specifically between the second extending duct 62 and the intervening duct 73.

[0065] The intervening duct 73 is interposed between the first inclined duct 71 and the blower 63 and between the second inclined duct 72 and the blower 63.

[0066] The blower 63 and the intervening duct 73 are provided along the center line C and are aligned in the longitudinal direction.

[0067] The first inclined duct 71 is inclined relative to the longitudinal direction such that, as it extends from one end 61x of the first extending duct 61 toward the blower 63 in the longitudinal direction, it shifts toward the second extending duct 62 in the width direction. In other words, the first inclined duct 71 is inclined downward and leftward in the sheet of FIG. 4.

[0068] The second inclined duct 72 is inclined relative to the longitudinal direction such that, as it extends from one end 62x of the second extending duct 62 toward the blower 63 in the longitudinal direction, it shifts toward the first extending duct 61 in the width direction. In other words, the second inclined duct 72 is inclined upward and leftward in the sheet of FIG. 4.

[0069] As shown in FIG. 4, when viewed in the up-down direction, an angle α1 which is formed between the center line X1 of the first extending duct 61 and the center line X2 of the first inclined duct 71 and is on the side of facing a space V (i.e., a space between the first extending duct 61 and the second extending duct 62 spaced apart from each other in the width direction) is an obtuse angle, and an angle α2 which is formed between the center line X3 of the second extending duct 62 and the center line X4 of the second inclined duct 72 and is on the side of facing the space V is an obtuse angle, too.

[0070] An angle β1 which is formed between the center line X2 of the first inclined duct 71 and the center line X5 of the intervening duct 73 and is on the side of facing the space V is an obtuse angle, and an angle β2 which is formed between the center line X3 of the second inclined duct 72 and the center line X5 of the intervening duct 73 and is on the side of facing the space V is an obtuse angle, too.

[0071] Each of the angles α1, α2, β1, and β2 is, for example, 120°. While FIG. 4 is a plan view and the angles α1, α2, β1, and β2 are shown in two dimensions, the above configuration also holds in three dimensions. For example, the blower 63 may be positioned slightly above each of the ducts 61, 62, 71, and 72. The angles α1, α2, β1, and β2 are defined by planes that pass through the center lines X1 to X5 of the ducts 61, 62, 71, 72, and 73 and are parallel to the side walls of the ducts.

[0072] The intervening duct 73 has a protruding portion 731 that protrudes toward the blower 63 (that is, leftward in the sheet of FIG. 4) from an inner surface 73s that is on the opposite side of the blower 63 in the longitudinal direction.

[0073] The protruding portion 731 has a triangular shape in plan view and is provided over the entirety of the intervening duct 73 in the up-down direction.

[0074] The protruding portion 731 has a first inclined surface 731a which is provided on the first extending duct 61 side in the width direction. The first inclined surface 731a is inclined relative to the longitudinal direction such that, as it extends from the inner surface 73s toward the blower 63 in the longitudinal direction, it shifts toward the second extending duct 62 in the width direction. In other words, the first inclined surface 731a is inclined downward and leftward in the sheet of FIG. 4. The protruding portion 731 has a second inclined surface 731b which is provided on the second extending duct 62 side in the width direction. The second inclined surface 731b is inclined relative to the longitudinal direction such that, as it extends from the inner surface 73s toward the blower 63 in the longitudinal direction, it shifts toward the first extending duct 61 in the width direction. In other words, the second inclined surface 731b is inclined upward and leftward in the sheet of FIG. 4.

[0075] The leading end of the protruding portion 731, that is, the intersection between the first inclined surface 731a and the second inclined surface 731b is located close to the blower 63 in the longitudinal direction as compared to an intersection N. The intersection N is the intersection between a first virtual straight line L1 extending along an inner surface 71s of the first inclined duct 71, which is on the opposite side of the blower 63 in the longitudinal direction, and a second virtual straight line L2 extending along an inner surface 72s of the second inclined duct 72, which is on the opposite side of the blower 63 in the longitudinal direction. The protruding portion 731 protrudes toward the blower 63 as compared to the intersection N, in a plane parallel to the longitudinal direction and the width direction as shown in FIG. 4.

[0076] The protruding portion 731 may or may not be hollow inside. For example, the protruding portion 731 that is hollow inside may be formed by combining two plates.

[0077] The airflows indicated by thick arrows in FIG. 4 are generated in the ducts 61, 62, 71, 72, and 73 due to the operation of the blower 63. The airflow from the first extending duct 61 toward the blower 63 via the first inclined duct 71 and the airflow from the second extending duct 62 toward the blower 63 via the second inclined duct 72 are guided by the inclined surfaces 731a and 731b of the protruding portion 731 in the intervening duct 73, are merged in the vicinity of the leading end of the protruding portion 731, and flow into the blower 63.

[0078] As described above, according to the present embodiment, the blower 63 is connected to one ends 61x and 62x in the longitudinal direction of the first extending duct 61 and the second extending duct 62 which are aligned in the width direction (see FIG. 4). In this case, as compared to a case where a blower 63 is connected to one end in the longitudinal direction of one extending duct (a long extending duct formed by connecting the first extending duct 61 with the second extending duct 62), the pressure loss of the airflows generated in the ducts 61 and 62 is reduced, with the result that sufficient amounts of airflows are generated in the ducts 61 and 62. In other words, according to the present embodiment, in the airflow generator 32, it is possible to reduce pressure loss and achieve energy saving.

[0079] In addition to the above, according to the present embodiment, the intervening duct 73 has a protruding portion 731 (see FIG. 4). When the blower 63 generates a negative pressure in each of the extending ducts 61 and 62, the airflow from the first extending duct 61 toward the blower 63 and the airflow from the second extending duct 62 toward the blower 63 may collide in the intervening duct 73, and a turbulent flow may be generated. In this regard, in the present embodiment, as shown in FIG. 4, the turbulent flow is suppressed as the airflows collide the protruding portion 731 before colliding each other. By suppressing the turbulent flow in this way, the airflow generator 32 can further suppress the pressure loss and further improve the energy saving.

[0080] The angles α1 and α2 are both obtuse angles (see FIG. 4). When the angles α1 and α2 are 90° or less, significant pressure loss occurs in the airflow between each of the extending ducts 61 and 62 and each of the inclined ducts 71 and 72. In this regard, according to the configuration above, because the angles α1 and α2 are obtuse, the pressure loss is small, and hence air flows smoothly between each of the extending ducts 61 and 62 and each of the inclined ducts 71 and 72. Therefore, according to this configuration, the airflow generator 32 can further suppress the pressure loss and further improve the energy saving.

[0081] The angles β1 and β2 are both obtuse (see FIG. 4). When the angles β1 and β2 are 90° or less, significant pressure loss occurs in the airflow between each of the inclined ducts 71 and 72 and the intervening duct 73. In this configuration, because the angles β1 and β2 are obtuse, the pressure loss is small, and hence air flows smoothly between each of the inclined ducts 71 and 72 and the intervening duct 73. Therefore, according to the configuration described above, the airflow generator 32 can further suppress the pressure loss and further improves the energy saving.

[0082] The protruding portion 731 has inclined surfaces 731a and 731b (see FIG. 4). According to this configuration, by generating an airflow along each of the inclined surfaces 731a and 731b of the protruding portion 731 in the intervening duct 73, the above-described effect of suppressing the turbulent flow can be obtained more reliably.

[0083] The protruding portion 731 protrudes toward the blower 63 as compared to the intersection N (see FIG. 4). With this configuration, the above-described effect of suppressing the turbulent flow can be obtained more reliably.

[0084] The protruding portion 731 is provided over the entirety of the intervening duct 73 in the up-down direction. With this configuration, the above-described effect of suppressing the turbulent flow can be obtained over the entirety of the intervening duct 73 in the up-down direction.

[0085] The airflow generator 32 is symmetrical in shape (see FIG. 4) with respect to the center line C that extends in the longitudinal direction and passes through the center in the width direction of the main frame 8 (see FIG. 1). According to this configuration, it is possible to uniformly generate airflows in the first extending duct 61 and the second extending duct 62.

[0086] The blower 63 generates a negative pressure in each of the extending ducts 61 and 62. When the blower generates a positive pressure in each of the extending ducts 61 and 62, foreign matters (for example, lubricant such as oil applied to the yarn Y) may scatter toward the outside of the extending ducts 61 and 62. In this regard, in the configuration above, the blower 63 generates a negative pressure in each of the extending ducts 61 and 62. It is therefore possible to prevent the scattering of the foreign matters described above.

[0087] The false-twist texturing machine 1 is provided with the cooler 14 included in the processing unit 3. The cooler 14 includes the airflow generator 32 and the cooling unit 31 in which the yarn running space S which communicates with the extending ducts 61 and 62 and where the yarns Y run is formed. The cooler 14 supplies cooling air to the yarn running space S though the extending duct 61 and 62 by driving the blower 63. According to the configuration, the yarns Y can be efficiently cooled by the cooling air generated by the airflow generator 32.<Example>

[0088] The inventors of the subject application conducted experiments of measuring air speed in the vicinity of an entrance of the yarn running space S (see FIG. 3) at different frequencies of the motor 632 (see FIG. 3) of the blower 63, by using: a first test body that is a test body of the cooler 14 of the embodiment above; a second test body that is a test body in which, in the cooler 14 of the embodiment above, the first extending duct 61 and the second extending duct 62 are connected in the longitudinal direction to form a single extending duct, and the blower 63 is connected to one end in the longitudinal direction of the single extending duct; and a third test body that is a test body in which, in the cooler 14 of the embodiment above, the blower 63 is connected to one end in the longitudinal direction of each of the first extending duct 61 and the second extending duct 62. The greater the air speed is, the higher the cooling efficiency is.

[0089] The first test body is an example of the present invention, while the second test body and the third test body are comparative examples of the present invention.

[0090] FIG. 5 shows experimentation results. In FIG. 5, the vertical axis shows a time-averaged air speed obtained from a sensor provided in the vicinity of the entrance of the yarn running space S (see FIG. 3) in each test body. In FIG. 5, the horizontal axis indicates the frequency of the motor 632 of the blower 63 (see FIG. 3). By changing the rotation number of the motor 632 using the inverter device 633, the experimentations were conducted at different frequencies of the motor 632.

[0091] In FIG. 5, "first test body I" is the first extending duct 61 included in the first test body, and "first test body II" is the second extending duct 62 included in the first test body. In other words, in the first test body, the air speed and the frequency were measured for each of the first extending duct 61 and the second extending duct 62. In the third test body, the air speed and the frequency were measured for each of the first extending duct 61 and the second extending duct 62. FIG. 5 shows the average values.

[0092] FIG. 5 shows that, especially in a frequency range of 30Hz and higher, the air speed was high in the first test bodies I and II as compared to the second test body and the third test body. In regard to the second test body, it is considered that the air speed was low because, as the two extending ducts 61 and 62 were combined to form one extending duct, the length of the duct (passage length) was long and the pressure loss was large.

[0093] FIG. 5 shows that, between the first test body I of the first extending duct 61 and the first test body II of the second extending duct 62, the air speed corresponding to each frequency was different. This difference, however, is considered to be reduced by appropriately adjusting the structure of the junction (e.g., the inclined duct 71, 72) between each of the extending ducts 61 and 62 and the blower 63.<Modifications>

[0094] A preferred embodiment of the present invention has been described. It should be noted that the present invention is not limited to the above-described embodiment, and various changes, substitutions, and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

[0095] For example, in order to further enhance the cooling efficiency of the cooler, the configuration described in Japanese Laid-Open Patent Publication No. 2023-012097 (the configuration of the cooling unit, the configuration of the slits formed in each extending duct, etc.) may be adopted.

[0096] The application of the airflow generator according to the present invention is not limited to the cooler. The airflow generator may be employed in, for example, a suction device configured to suck oil adhered to a yarn.

[0097] The blower may generate a positive pressure in each of the first extending duct and the second extending duct. In this case, by providing a protruding portion, the airflow supplied from the blower to the intervening duct can be smoothly branched to the extending ducts by the protruding portion.

[0098] The first extending duct and the second extending duct may extend in a direction slightly inclined relative to the longitudinal direction of the main frame, as long as they extend along the longitudinal direction. Furthermore, the first extending duct and the second extending duct may not be straight along the longitudinal direction of the main frame, and may have a curved or bent portion. Furthermore, the direction in which the first extending duct extends and the direction in which the second extending duct extends may not be identical, and may intersect with each other.

[0099] The ducts (the first extending duct, the second extending duct, the first inclined duct, the second inclined duct, and the intervening duct) may not be square cylindrical in shape, and may be, for example, circular cylindrical in shape.

[0100] The protruding portion is triangular in shape in plan view (see FIG. 4) in the above-described embodiment, but the protruding portion is not limited to this shape. For example, the protruding portion may be semicircular or rectangular in shape in plan view. When the protruding portion is rectangular in shape in plan view, both a side surface on the first extending duct side and a side face on the second extending duct side of the protruding portion may both extend along the longitudinal direction.

Examples

Embodiment Construction

[0025]The following will describe a false-twist texturing machine 1 of an embodiment of the present invention, with reference to FIG. 1 to FIG. 3.

[0026]In the following description, an up-down direction is defined based on the premise that a false-twist texturing machine 1 is installed to be usable. Furthermore, with reference to a main frame 8 of the false-twist texturing machine 1, the longitudinal direction of the main frame 8 is defined as a longitudinal direction, and the width direction of the main frame 8 is defined as a width direction. The up-down direction, the longitudinal direction, and the width direction are orthogonal to each other. Furthermore, the direction in which a yarn Y runs is defined as a yarn running direction.

[0027]The false-twist texturing machine 1 includes a main frame 8, yarn supplying units 2, processing units 3, and winding units 4, as shown in FIG. 1. The yarn supplying unit 2, the processing unit 3, and the winding unit 4 are arranged on each of one...

Claims

1. A false-twist texturing machine (1) comprising: a main frame (8); a processing unit (3) which is provided on each of one side and the other side in a width direction of the main frame (8) and is configured to process yarns (Y) aligned in a longitudinal direction of the main frame (8); and an airflow generator (32) which is included in the processing unit (3), the airflow generator (32) including: a first extending duct (61) which is provided on the one side in the width direction of the main frame (8) and extends along the longitudinal direction; a second extending duct (62) which is provided on the other side in the width direction of the main frame (8) and extends along the longitudinal direction; a blower (63) which generates an airflow in the longitudinal direction; and an intervening duct (73) which is provided between the first extending duct (61) and the blower (63) and between the second extending duct (62) and the blower (63) and is aligned with the blower (63) in the longitudinal direction, the first extending duct (61) and the second extending duct (62) being aligned in the width direction, one end (61x) in the longitudinal direction of the first extending duct (61) and one end (62x) in the longitudinal direction of the second extending duct (62) being connected to the blower (63), and the intervening duct (73) having a protruding portion (731) which protrudes toward the blower (63) from an inner surface that is on the opposite side of the blower (63) in the longitudinal direction.

2. The false-twist texturing machine (1) according to claim 1, wherein, the airflow generator (32) further includes: a first inclined duct (71) which is provided between the first extending duct (61) and the blower (63); and a second inclined duct (72) which is provided between the second extending duct (62) and the blower (63), the first inclined duct (71) is inclined relative to the longitudinal direction such that, as it extends from the one end (61x) of the first extending duct (61) toward the blower (63) in the longitudinal direction, it shifts toward the second extending duct (62) in the width direction, the second inclined duct (72) is inclined relative to the longitudinal direction such that, as it extends from the one end (62x) of the second extending duct (62) toward the blower (63) in the longitudinal direction, it shifts toward the first extending duct (61) in the width direction, and an angle (α1) which is formed between the center line of the first extending duct (61) and the center line of the first inclined duct (71) and is on the side of facing a space (V) between the first extending duct (61) and the second extending duct (62) spaced apart from each other in the width direction is an obtuse angle, and an angle (α2) which is formed between the center line of the second extending duct (62) and the center line of the second inclined duct (72) and is on the side of facing the space (V) is an obtuse angle.

3. The false-twist texturing machine (1) according to claim 2, wherein, the airflow generator (32) further includes an intervening duct (73) which is provided between the first inclined duct (71) and the blower (63) and between the second inclined duct (72) and the blower (63), and an angle (β1) which is formed between the center line of the first inclined duct (71) and the center line of the intervening duct (73) and is on the side of facing the space (V) is an obtuse angle, and an angle (β2) which is formed between the center line of the second inclined duct (72) and the center line of the intervening duct (73) and is on the side of facing the space (V) is an obtuse angle.

4. The false-twist texturing machine (1) according to any one of claims 1 to 3, wherein, the protruding portion (731) includes: a first inclined surface (731a), provided on the first extending duct (61) side in the width direction, is inclined relative to the longitudinal direction such that, as it extends from the inner surface (73s) toward the blower (63) in the longitudinal direction, it shifts toward the second extending duct (62) in the width direction; and a second inclined surface (731b), provided on the second extending duct (62) side in the width direction, is inclined relative to the longitudinal direction such that, as it extends from the inner surface (73s) toward the blower (63) in the longitudinal direction, it shifts toward the first extending duct (61) in the width direction.

5. The false-twist texturing machine (1) according to any one of claims 1 to 4, wherein, the airflow generator (32) further includes: a first inclined duct (71) which is provided between the first extending duct (61) and the intervening duct (73); and a second inclined duct (72) which is provided between the second extending duct (62) and the intervening duct (73), the first inclined duct (71) is inclined relative to the longitudinal direction such that, as it extends from the one end (61x) of the first extending duct (61) toward the intervening duct (73) in the longitudinal direction, it shifts toward the second extending duct (62) in the width direction, the second inclined duct (72) is inclined relative to the longitudinal direction such that, as it extends from the one end (62x) of the second extending duct (62) toward the intervening duct (73) in the longitudinal direction, it shifts toward the first extending duct (61) in the width direction, and in a plane in parallel to the longitudinal direction and the width direction, the protruding portion (731) protrudes toward the blower (63) as compared to an intersection (N) between a first virtual straight line (L1) which extends along an inner surface (71s) of the first inclined duct (71), which is on the opposite side of the blower (63) in the longitudinal direction, and a second virtual straight line (L2) which extends along an inner surface (72s) of the second inclined duct (72), which is on the opposite side of the blower (63) in the longitudinal direction.

6. The false-twist texturing machine (1) according to any one of claims 1 to 5, wherein, the protruding portion (731) is provided over entirety of the intervening duct (73) in an up-down direction that is orthogonal to both the width direction and the longitudinal direction.

7. The false-twist texturing machine (1) according to any one of claims 1 to 6, wherein, the airflow generator (32) is symmetrical in shape with respect to a center line that extends in the longitudinal direction and passes through the center in the width direction of the main frame (8).

8. The false-twist texturing machine (1) according to any one of claims 1 to 7, wherein, the blower (63) generates a negative pressure in each of the first extending duct (61) and the second extending duct (62).

9. The false-twist texturing machine (1) according to any one of claims 1 to 8, further comprising a cooler (14) which is included in the processing unit (3) and includes the airflow generator (32) and a cooling unit (31) which communicates with the first extending duct (61) and the second extending duct (62), a yarn running space (S) in which the yarns (Y) run being formed in the cooling unit (31), the cooler (14) supplying cooling air to the yarn running space (S) through the first extending duct (61) and the second extending duct (62) by driving the blower (63).

Images