Damn processing machine

Abstract

This device reduces pressure loss in airflow generators, thereby achieving energy savings. [Solution] The false twisting machine according to the present invention comprises a main machine base, processing sections arranged on one and the other sides in the width direction of the main machine base, processing a plurality of yarns arranged in the longitudinal direction of the main machine base, and an airflow generating device 32 included in the processing section. The airflow generating device 32 comprises a first extending duct 61 arranged on one side in the width direction with respect to a center line C that extends in the longitudinal direction through the center of the width direction of the main machine base and extends along the longitudinal direction, a second extending duct 62 arranged on the other side in the width direction with respect to 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 by the first extending duct 61 and the second extending duct 62.

Description

Technical Field

[0001] The present invention relates to a false twisting machine equipped with an air flow generating device.

Background Art

[0002] Patent Document 1 discloses a cooling device (air flow generating device) applied to a false twisting machine, which includes a duct in which an inner space is formed, and a negative pressure generating device (blower) arranged at one or the other end in the longitudinal direction of the duct and configured to generate a negative pressure in the inner space of the duct. The duct and the negative pressure generating device are arranged symmetrically with respect to the main machine base of the false twisting machine in the left-right direction in the width direction of the main machine base.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, a negative pressure generating device (blower) is provided for each of the two ducts arranged on one side and the other side in the width direction of the main machine base. In this case, in each duct, a large pressure loss occurs in the air flow, and a sufficient amount of air flow cannot be generated up to the other end on the side opposite to the longitudinal end where the blower is provided. As a result, in order to generate a sufficient amount of air flow throughout the entire longitudinal direction of each duct, it is necessary to increase the driving force of the blower, and energy saving cannot be achieved. This problem becomes more prominent as the length of the duct in the longitudinal direction is longer.

[0005] An object of the present invention is to provide a false twisting machine capable of reducing pressure loss in an air flow generating device and achieving energy saving.

Means for Solving the Problems

[0006] The false twisting machine according to the present invention comprises a main machine base, a processing section for processing a plurality of yarns arranged on one side and the other side in the width direction of the main machine base and aligned in the longitudinal direction of the main machine base, and an airflow generating device included in the processing section, wherein the airflow generating device comprises a first extending duct arranged on one side in the width direction of the main machine base and extending along the longitudinal direction, and a second extending duct arranged on the other side in the width direction of the main machine base and extending along the longitudinal direction, The generation of the longitudinal airflow Blower and, An intervening duct is located 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 and second extending ducts are arranged in parallel in the width direction, and one end of the first extending duct in the longitudinal direction and one end of the second extending duct in the longitudinal direction are connected to the blower. The intervening duct has a projection on its inner surface opposite to the blower in the longitudinal direction, which protrudes toward the blower. It is characterized by the following:

[0007] According to the present invention, a blower is connected to one end in the longitudinal direction of each of the first and second extending ducts, which are arranged in parallel in the width direction. In this case, compared to the case where a blower is connected to one end in the longitudinal direction of a single extending duct (a long extending duct connecting the first and second extending ducts), the pressure loss of the airflow generated in the duct is reduced, and a sufficient amount of airflow can be generated in the duct. In other words, according to the present invention, energy saving can be achieved by reducing pressure loss in an airflow generating device.

[0008] Furthermore, according to the present invention, the intervening duct has a protrusion. When the blower generates negative pressure in each extending duct, the airflow from the first extending duct toward the blower and the airflow from the second extending duct toward the blower collide in the intervening duct, potentially generating turbulence. In this regard, according to the present invention, turbulence can be suppressed by the airflows colliding with the protrusion before they collide with each other. When the blower generates positive pressure in each extending duct, the airflow sent from the blower to the intervening duct can be smoothly branched toward each extending duct by the protrusion. By suppressing turbulence or smoothing the airflow in this way, pressure loss can be further reduced in the airflow generating device, and energy efficiency can be further improved.

[0009] The airflow generating device further includes a first inclined duct disposed between the first extending duct and the blower, and a second inclined duct disposed between the second extending duct and the blower, wherein the first inclined duct is inclined with respect to the longitudinal direction such that it approaches the second extending duct from the first extending duct in the width direction as it approaches the blower from one end of the first extending duct in the longitudinal direction, and the second inclined duct is inclined with respect to the longitudinal direction such that it approaches the second extending duct from the first extending duct in the width direction as it approaches the blower from one end of the first extending duct in the longitudinal direction As the duct approaches the blower, it is inclined with respect to the longitudinal direction so that in the width direction it approaches the first extending duct from the second extending duct, and it is preferable that the angle between the center line of the first extending duct and the center line of the first inclined duct that faces the space between the first extending duct and the second extending duct which are spaced apart from each other in the width direction, and the angle between the center line of the second extending duct and the center line of the second inclined duct that faces the space, are both obtuse angles.

[0010] When the above angle is 90° or less, a large pressure loss occurs in the airflow between each extending duct and the inclined duct. However, with this configuration, since the above angle is obtuse, the pressure loss is reduced, and air flows smoothly between each extending duct and the inclined duct. Therefore, with this configuration, the pressure loss in the airflow generator can be further reduced, and energy efficiency is further improved.

[0011] The airflow generating device further includes an intervening duct interposed between the first inclined duct and the blower and between the second inclined duct and the blower, and it is preferable that the angle formed by the center line of the first inclined duct and the center line of the intervening duct on the side facing the space, and the angle formed by the center line of the second inclined duct and the center line of the intervening duct on the side facing the space, are both obtuse angles.

[0012] When the above angle is 90° or less, a large pressure loss occurs in the airflow between each inclined duct and the intervening duct. In this configuration, however, since the above angle is obtuse, the pressure loss is reduced, and air flows smoothly between each inclined duct and the intervening duct. Therefore, with this configuration, the pressure loss in the airflow generator can be further reduced, and energy efficiency is further improved. 。

[0013] Preferably, the protruding portion has a first inclined surface on the first extending duct side in the width direction, which is inclined with respect to the longitudinal direction such that as it approaches the blower from the inner surface in the longitudinal direction, it approaches the second extending duct from the first extending duct in the width direction, and a second inclined surface on the second extending duct side in the width direction, which is inclined with respect to the longitudinal direction such that as it approaches the blower from the inner surface in the longitudinal direction, it approaches the first extending duct from the second extending duct in the width direction.

[0014] With this configuration, airflow is generated along each inclined surface of the protruding portion in the intervening duct, thereby more reliably achieving the aforementioned turbulence suppression effect and the effect of smoothly branching the airflow.

[0015] The airflow generating device further includes a first inclined duct disposed between the first extending duct and the intervening duct, and a second inclined duct disposed between the second extending duct and the intervening duct, wherein the first inclined duct is inclined with respect to the longitudinal direction such that it approaches the intervening duct from one end of the first extending duct in the longitudinal direction, and approaches the second extending duct from the first extending duct in the width direction, and the second inclined duct is inclined with respect to the longitudinal direction of the second extending duct It is preferable that the protruding portion, as it approaches the intervening duct from one end, is inclined with respect to the longitudinal direction so that in the width direction it approaches the first extending duct from the second extending duct, and that the protruding portion protrudes toward the blower from a point beyond the intersection of a first virtual straight line along the inner surface of the first inclined duct opposite to the blower in the longitudinal direction and a second virtual straight line along the inner surface of the second inclined duct opposite to the blower in the longitudinal direction, in a plane parallel to the longitudinal direction and the width direction.

[0016] With this configuration, the protruding portion extends further toward the blower than the aforementioned intersection, making it possible to more reliably obtain the turbulence suppression effect and the effect of smoothly branching the airflow described above.

[0017] Preferably, the protruding portion is provided over the entire vertical direction perpendicular to both the width direction and the longitudinal direction of the intervening duct.

[0018] With this configuration, the aforementioned effects of suppressing turbulence and smoothly branching the airflow can be obtained throughout the entire vertical direction of the intervening duct.

[0019] Preferably, the airflow generating device has a shape symmetrical with respect to a center line that passes through the center of the main unit base in the width direction and extends in the longitudinal direction.

[0020] This configuration allows for uniform airflow to be generated in the first and second extended ducts.

[0021] The blower preferably generates a negative pressure in the first extending duct and the second extending duct.

[0022] When the blower generates a positive pressure in each extending duct, foreign matter (for example, a lubricant such as oil applied to the yarn) can scatter toward the outside of each extending duct. In this regard, in this configuration, since the blower generates a negative pressure in each extending duct, scattering of foreign matter as described above can be prevented.

[0023] The false twisting machine according to the present invention includes a cooling device included in the processing unit, the cooling device having an air flow generating device, and a cooling unit communicating with the first extending duct and the second extending duct and having a yarn running space in which the plurality of yarns run. It is preferable that the cooling device supplies cooling air to the yarn running space through the first extending duct and the second extending duct by driving the blower.

[0024] According to this configuration, the plurality of yarns can be efficiently cooled by the cooling air generated by the air flow generating device.

Brief Description of the Drawings

[0025] [Figure 1] It is a schematic diagram of a false twisting machine according to an embodiment of the present invention. [Figure 2] It is a schematic diagram of the false twisting machine of FIG. 1 developed along the yarn running direction. [Figure 3] It is a view taken in the direction of arrow III of FIG. 1. [Figure 4] It is a plan view of an air flow generating device according to an embodiment of the present invention. [Figure 5] It is a graph showing experimental results using a first test body according to an example of the present invention and second and third test bodies according to comparative examples.

Modes for Carrying Out the Invention

[0026] <Embodiment> First, referring to FIGS. 1 to 3, a false twisting machine 1 according to an embodiment of the present invention will be described.

[0027] In the following explanation, the "vertical direction" is defined based on the state in which the false twisting machine 1 is installed and ready for use. Furthermore, the longitudinal direction of the main machine base 8 of the false twisting machine 1 is defined as the "longitudinal direction," and the width direction of the main machine base 8 is defined as the "width direction." The vertical direction, longitudinal direction, and width direction are orthogonal to each other. In addition, the direction in which the yarn Y travels is defined as the "yarn travel direction."

[0028] As shown in Figure 1, the false twisting machine 1 comprises a main machine base 8, a yarn feeding section 2, a processing section 3, and a winding section 4. The yarn feeding section 2, processing section 3, and winding section 4 are positioned on one and the other sides of the width direction relative to the main machine base 8. The false twisting machine 1 has a symmetrical structure with respect to a center line C that extends longitudinally through the center of the width direction of the main machine base 8. The yarn feeding section 2, processing section 3, and winding section 4 are divided into one and the other sides of the width direction with respect to the center line C.

[0029] The following describes the yarn feeding section 2, processing section 3, and winding section 4, which are located on one side in the width direction relative to the main machine base 8.

[0030] As shown in Figure 2, the yarn feeding section 2, the processing section 3, and the winding section 4 are arranged in this order from upstream to downstream in the yarn travel direction.

[0031] The yarn feeding unit 2 has a creel stand 7. As shown in Figure 2, the creel stand 7 holds a plurality of yarn feeding packages Ps. Each yarn feeding package Ps contains yarn Y. Yarn Y is made of, for example, a synthetic fiber (e.g., polyester) and is a single filament or a multifilament yarn consisting of multiple filaments.

[0032] As shown in Figure 2, the processing unit 3 has a first feed roller 11, a twisting guide 12, a first heating device 13, a cooling device 14, a false twist device 15, a second feed roller 16, an entanglement device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20, arranged in this order from upstream to downstream in the yarn running direction. Of these, the false twist device 15, the second feed roller 16, the entanglement device 17, the third feed roller 18, and the second heating device 19 are mounted on the main machine base 8, as shown in Figure 1. Furthermore, of these, the entanglement device 17, the third feed roller 18, and the second heating device 19 are arranged vertically along the main machine base 8 and may be shared between one and the other in the width direction.

[0033] As shown in Figure 2, multiple first feed rollers 11 are provided, each corresponding to one of the multiple yarn supply packages Ps. One first feed roller 11 unwinds yarn Y from one corresponding yarn supply package Ps and sends one yarn Y to the first heating device 13. Alternatively, one first feed roller 11 may be provided to correspond to multiple yarn supply packages Ps, unwinding multiple yarn Y from the multiple yarn supply packages Ps and sending multiple yarn Y to the first heating device 13.

[0034] As shown in Figure 2, multiple twist-stopping guides 12 are provided to correspond to each of the multiple yarn supply packages Ps. The twist-stopping guides 12 prevent the twist applied to the yarn Y by the false twisting device 15 from propagating upstream of the twist-stopping guides 12 in the yarn travel direction.

[0035] As shown in Figure 2, the first heating device 13 is provided so that one first heating device 13 corresponds to two first feed rollers 11. One first heating device 13 heats two threads Y fed by the two first feed rollers 11. Alternatively, one first heating device 13 may be provided so as to correspond to one first feed roller 11, and it may heat one thread Y fed by the corresponding first feed roller 11.

[0036] As shown in Figure 2, the cooling device 14 is provided to accommodate the entirety of the multiple yarn supply packages Ps.

[0037] The cooling device 14 is a non-contact type device that cools a plurality of threads Y heated by the first heating device 13 with cooling air, and as shown in Figure 3, it has a cooling unit 31 and an airflow generator 32.

[0038] As shown in Figures 1 and 4, the airflow generator 32 includes a first extending duct 61, a second extending duct 62, and a blower 63. Both the first extending duct 61 and the second extending duct 62 extend in the longitudinal direction. Details of the airflow generator 32 will be described later.

[0039] As shown in Figure 3, the cooling unit 31 has multiple sets of two cooling members 31A and 31B that are adjacent in the longitudinal direction. These sets are attached to each of the first and second extending ducts 61 and 62, respectively, in a row in the longitudinal direction. In each set, the two cooling members 31A and 31B are inclined with respect to a virtual straight line A and are arranged symmetrically with respect to the virtual straight line A. The longitudinal distance between the two cooling members 31A and 31B in each set increases as you move downstream in the direction of thread travel. The virtual straight line A is parallel to the width direction of the extending ducts 61 and 62, and is also parallel to the width direction (see Figure 1).

[0040] As shown in Figure 3, each cooling member 31A and 31B has a thread travel space S through which a single thread Y travels. The thread travel space S is in communication with the intake space Ss in the corresponding extending ducts 61 and 62 via a slit that penetrates the wall of the extending duct.

[0041] The cooling device 14 generates negative pressure in the intake space Ss within the extending ducts 61 and 62 by driving the blower 63, thereby supplying cooling air to the yarn travel space S. The yarn Y traveling within the yarn travel space S is cooled by this cooling air.

[0042] As shown in Figure 3, the blower 63 includes an impeller 631, a motor 632 that rotates the impeller 631, an inverter device 633 that can change the rotational speed of the motor 632, and a housing 634 that houses the impeller 631, the motor 632, and the inverter device 633. The blower 63 generates negative pressure in the intake space Ss by rotating the impeller 631 driven by the motor 632. Negative pressure means a pressure lower than atmospheric pressure (in this embodiment, the atmospheric pressure outside the cooling device 14).

[0043] As shown in Figure 2, multiple false twisting devices 15 are provided to correspond to each of the multiple yarn supply packages Ps. The false twisting devices 15 are, for example, known disc friction type false twisting devices or known belt type false twisting devices, and they impart twist to the yarn Y that has been cooled by the cooling device 14.

[0044] Furthermore, downstream of the false twisting device 15 in the direction of yarn travel, the yarn Y is untwisted, but the heat fixing in the first heating device 13 maintains the wavy false twist state (i.e., the crimp of yarn Y is maintained).

[0045] As shown in Figure 2, there are multiple second feed rollers 16, each corresponding to one of the multiple yarn supply packages Ps. The second feed rollers 16 send the yarn Y, which has been twisted by the false twisting device 15, to the entanglement device 17.

[0046] The conveying speed of the yarn Y by the second feed roller 16 is faster than the conveying speed of the yarn Y by the first feed roller 11. As a result, the yarn Y is stretched between the first feed roller 11 and the second feed roller 16.

[0047] As shown in Figure 2, multiple entanglement devices 17 are provided, corresponding to each of the multiple yarn supply packages Ps. The entanglement devices 17 impart entanglement to the yarn Y fed by the second feed roller 16. The entanglement devices 17 have known interlacing nozzles that impart entanglement to the yarn Y by, for example, airflow.

[0048] As shown in Figure 2, there are multiple third feed rollers 18, each corresponding to one of the multiple yarn supply packages Ps. One third feed roller 18 sends one yarn Y, which has been entangled by a corresponding entanglement device 17, to the second heating device 19. Alternatively, one third feed roller 18 may be provided to correspond to multiple entanglement devices 17, and multiple yarns Y, which have been entangled by the multiple entanglement devices 17, to the second heating device 19.

[0049] The conveying speed of the yarn Y by the third feed roller 18 is slower than the conveying speed of the yarn Y by the second feed roller 16. As a result, the yarn Y is loosened between the second feed roller 16 and the third feed roller 18.

[0050] As shown in Figure 2, the second heating device 19 is provided to accommodate the entirety of the multiple yarn supply packages Ps. The second heating device 19 heats the yarn Y fed by the third feed roller 18.

[0051] As shown in Figure 2, there are multiple fourth feed rollers 20, each corresponding to one of the multiple yarn supply packages Ps. One fourth feed roller 20 sends one yarn Y, heated by a corresponding second heating device 19, to the winding device 21. Alternatively, one fourth feed roller 20 may send multiple adjacent yarns Y to the winding device 21.

[0052] The conveying speed of the yarn Y by the fourth feed roller 20 is slower than the conveying speed of the yarn Y by the third feed roller 18. As a result, the yarn Y is loosened between the third feed roller 18 and the fourth feed roller 20.

[0053] As shown in Figure 2, the winding section 4 has multiple winding devices 21, each corresponding to one of the multiple yarn supply packages Ps.

[0054] Each winding device 21 includes a pivot guide 41, a traverse device 42, and a cradle 43.

[0055] The pivot guide 41 is a guide that serves as a pivot point when the yarn Y is traversed by the traverse device 42. The traverse device 42 includes a traverse guide 45, which traverses the yarn Y. The cradle 43 rotatably supports the winding bobbin Bw. A contact roller 46 is positioned near the cradle 43. The contact roller 46 contacts the surface of the winding package Pw and applies contact pressure.

[0056] Each winding device 21 winds the yarn Y fed by the fourth feed roller 20 onto a winding bobbin Bw to form a winding package Pw.

[0057] Multiple winding devices 21 are mounted on a winding table 9, as shown in Figure 1. The winding table 9 extends longitudinally, parallel to the main machine base 8. The longitudinal length of the winding table 9 is approximately the same as the longitudinal length of the main machine base 8. In the width direction, a workspace Sw is provided between the main machine base 8 and the winding table 9 for an operator to perform tasks such as threading.

[0058] Next, with reference to Figure 4, the airflow generator 32 will be described in detail.

[0059] As shown in Figure 4, the airflow generator 32 has a symmetrical shape with respect to the center line C that extends longitudinally through the center in the width direction of the main engine base 8 (see Figure 1).

[0060] The airflow generator 32 includes a first extending duct 61 and a first inclined duct 71 arranged on one side in the width direction with respect to the center line C, a second extending duct 62 and a second inclined duct 72 arranged on the other side in the width direction with respect to the center line C, and an intervening duct 73 and a blower 63 arranged on the center line C.

[0061] Ducts 61, 62, 71, 72, and 73 are rectangular tubes, and their vertical lengths are approximately the same. Furthermore, the flow path widths and cross-sectional areas of ducts 61, 62, 71, and 72 are also approximately the same.

[0062] The first extending duct 61 and the second extending duct 62 each extend along their longitudinal direction and are arranged in parallel in the width direction.

[0063] The blower 63 (more specifically, the housing 634 shown in Figure 3) is connected to one longitudinal end (one end in the longitudinal direction) 61x of the first extending duct 61 via the inclined duct 71 and the intervening duct 73. The blower 63 (more specifically, the housing 634 shown in Figure 3) is also connected to one longitudinal end (one end in the longitudinal direction) 62x of the second extending duct 62 via the inclined duct 72 and the intervening duct 73.

[0064] The first inclined duct 71 is positioned between the first extending duct 61 and the blower 63, or more specifically, between the first extending duct 61 and the intervening duct 73.

[0065] The second inclined duct 72 is positioned between the second extending duct 62 and the blower 63, or more specifically, between the second extending duct 62 and the intervening duct 73.

[0066] 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.

[0067] The blower 63 and the intervening duct 73 are arranged along the center line C and aligned in the longitudinal direction.

[0068] The first inclined duct 71 is inclined with respect to its longitudinal direction such that, in the longitudinal direction, it approaches the blower 63 from one end 61x of the first extending duct 61 (i.e., towards the left side of the page in Figure 4), and in the width direction, it approaches the second extending duct 62 from the first extending duct 61 (i.e., towards the bottom side of the page in Figure 4).

[0069] The second inclined duct 72 is inclined with respect to its longitudinal direction such that, in the longitudinal direction, it approaches the blower 63 from one end 62x of the second extending duct 62 (i.e., towards the left side of the page in Figure 4), and in the width direction, it approaches the first extending duct 61 from the second extending duct 62 (i.e., towards the top side of the page in Figure 4).

[0070] As shown in Figure 4, when viewed from above, the angle α1 on the side facing the space (the space between the first extending duct 61 and the second extending duct 62, which are spaced apart in the width direction) of the angle formed by the center line X1 of the first extending duct 61 and the center line X2 of the first inclined duct 71, and the angle α2 on the side facing the space V of the angle formed by the center line X3 of the second extending duct 62 and the center line X4 of the second inclined duct 72, are both obtuse angles.

[0071] The angle β1 on the side facing space V, formed by the center line X2 of the first inclined duct 71 and the center line X5 of the intervening duct 73, and the angle β2 on the side facing space V, formed by the center line X3 of the second inclined duct 72 and the center line X5 of the intervening duct 73, are both obtuse angles.

[0072] The angles α1, α2, β1, and β2 are, for example, 120°. Also, although Figure 4 is a plan view and the angles α1, α2, β1, and β2 are shown in two dimensions, the above configuration also holds true in three dimensions. For example, the blower 63 may be positioned slightly above each duct 61, 62, 71, and 72. The angles α1, α2, β1, and β2 are defined by planes that pass through the centerlines X1 to X5 of each duct 61, 62, 71, 72, and 73 and are parallel to the side walls of the ducts.

[0073] The intervening duct 73 has a projection 731 on its inner surface 73s opposite to the blower 63 in the longitudinal direction, projecting toward the blower 63 (i.e., to the left side of the page in Figure 4).

[0074] The protrusion 731 is triangular in shape in plan view and is provided over the entire length of the intervening duct 73 in the vertical direction.

[0075] The protruding portion 731 has a first inclined surface 731a that is inclined with respect to the longitudinal direction, on the first extending duct 61 side in the width direction, and as it approaches the blower 63 from the inner surface 73s in the longitudinal direction (i.e., as it moves towards the left side of the paper in Figure 4), and as it approaches the second extending duct 62 from the first extending duct 61 in the width direction (i.e., as it moves towards the bottom side of the paper in Figure 4). The protruding portion 731 has a second inclined surface 731b that is inclined with respect to the longitudinal direction, on the second extending duct 62 side in the width direction, and as it approaches the blower 63 from the inner surface 73s in the longitudinal direction (i.e., as it moves towards the left side of the paper in Figure 4), and as it approaches the first extending duct 61 from the second extending duct 62 in the width direction (i.e., as it moves towards the top side of the paper in Figure 4).

[0076] The tip of the protrusion 731, that is, the intersection of the first inclined surface 731a and the second inclined surface 731b, is located closer to the blower 63 in the longitudinal direction than intersection point N. Intersection point N is the intersection of a first virtual line L1 along the inner surface 71s opposite to the blower 63 in the longitudinal direction of the first inclined duct 71 and a second virtual line L2 along the inner surface 72s opposite to the blower 63 in the longitudinal direction of the second inclined duct 72. As shown in Figure 4, the protrusion 731 protrudes toward the blower 63 from intersection point N in a plane parallel to the longitudinal and width directions.

[0077] The protruding portion 731 may or may not be hollow inside. For example, a hollow protruding portion 731 may be formed by combining two plate materials.

[0078] When the blower 63 is driven, airflow is generated in the ducts 61, 62, 71, 72, and 73 as shown by the thick arrows in Figure 4. The airflow from the first extending duct 61 to the blower 63 via the first inclined duct 71 and the airflow from the second extending duct 62 to the blower 63 via the second inclined duct 72 are guided to the respective inclined surfaces 731a and 731b of the protrusion 731 within the intervening duct 73, merge near the tip of the protrusion 731, and flow into the blower 63.

[0079] As described above, according to this embodiment, the blower 63 is connected to one end 61x, 62x in the longitudinal direction of the first extending duct 61 and the second extending duct 62, which are arranged in parallel in the width direction (see Figure 4). In this case, compared to the case where the blower 63 is connected to one end in the longitudinal direction of a single extending duct (a long extending duct connecting the first extending duct 61 and the second extending duct 62), the pressure loss of the airflow generated in the ducts 61 and 62 is reduced, and a sufficient amount of airflow can be generated in the ducts 61 and 62. In other words, according to this embodiment, the airflow generator 32 can reduce pressure loss and achieve energy savings.

[0080] Furthermore, according to this embodiment, the intervening duct 73 has a protrusion 731 (see Figure 4). When the blower 63 generates 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 collide in the intervening duct 73, potentially generating turbulence. In this embodiment, as shown in Figure 4, turbulence can be suppressed by the airflows colliding with the protrusion 731 before they collide with each other. By suppressing turbulence in this way, pressure loss in the airflow generator 32 can be further reduced, and energy efficiency can be further improved.

[0081] Both angles α1 and α2 are obtuse (see Figure 4). When angles α1 and α2 are 90° or less, a large pressure loss occurs in the airflow between each extended duct 61, 62 and the inclined ducts 71, 72. In this configuration, however, because angles α1 and α2 are obtuse, the pressure loss is reduced, and air flows smoothly between each extended duct 61, 62 and the inclined ducts 71, 72. Therefore, with this configuration, the pressure loss in the airflow generator 32 can be further reduced, and energy efficiency is further improved.

[0082] Both angles β1 and β2 are obtuse (see Figure 4). When angles β1 and β2 are 90° or less, a large pressure loss occurs in the airflow between each inclined duct 71, 72 and the intervening duct 73. In this configuration, however, because angles β1 and β2 are obtuse, the pressure loss is reduced, and air flows smoothly between each inclined duct 71, 72 and the intervening duct 73. Therefore, with this configuration, the pressure loss in the airflow generator 32 can be further reduced, and energy efficiency is further improved. 。

[0083] The protruding portion 731 has inclined surfaces 731a and 731b (see Figure 4). With this configuration, airflow is generated along the respective inclined surfaces 731a and 731b of the protruding portion 731 in the intervening duct 73, thereby more reliably achieving the turbulence suppression effect described above.

[0084] The protruding portion 731 extends toward the blower 63 beyond intersection N (see Figure 4). With this configuration, the turbulence suppression effect described above can be obtained more reliably.

[0085] The protrusion 731 is provided over the entire vertical length of the intervening duct 73. With this configuration, the turbulence suppression effect described above can be obtained over the entire vertical length of the intervening duct 73.

[0086] The airflow generator 32 has a shape that is symmetrical with respect to the center line C that extends longitudinally through the center in the width direction of the main engine base 8 (see Figure 1) (see Figure 4). With this configuration, a uniform airflow can be generated in the first extended duct 61 and the second extended duct 62.

[0087] The blower 63 generates negative pressure in the extended ducts 61 and 62. If the blower generates positive pressure in the extended ducts 61 and 62, foreign matter (for example, lubricant such as oil applied to thread Y) may be scattered to the outside of the extended ducts 61 and 62. In this configuration, however, since the blower 63 generates negative pressure in the extended ducts 61 and 62, the scattering of such foreign matter can be prevented.

[0088] The false twisting machine 1 includes a cooling device 14 within the processing section 3, which comprises an airflow generator 32 and a cooling unit 31 that communicates with extended ducts 61 and 62 and has a yarn running space S through which multiple yarns Y travel. The cooling device 14 supplies cooling air to the yarn running space S via the extended ducts 61 and 62 by driving a blower 63. With this configuration, multiple yarns Y can be efficiently cooled by the cooling air generated by the airflow generator 32.

[0089] <Examples> The inventors of the present invention conducted an experiment using three test specimens: a first test specimen, which is a test specimen of the cooling device 14 according to the above-described embodiment; a second test specimen, which is a test specimen in which the first extending duct 61 and the second extending duct 62 in the longitudinal direction are connected in the cooling device 14 according to the above-described embodiment to form a single extending duct, and a blower 63 is connected to one end of the single extending duct in the longitudinal direction; and a third test specimen, which is a test specimen in which a blower 63 is connected to one end of the first extending duct 61 and the second extending duct 62, respectively, in the cooling device 14 according to the above-described embodiment. The experiment measured the wind speed near the inlet of the thread running space S (see Figure 3) in each test specimen while changing the frequency of the motor 632 (see Figure 3) of the blower 63. A higher wind speed indicates higher cooling efficiency.

[0090] The first test specimen is an embodiment of the present invention, while the second and third test specimens are comparative examples of the present invention.

[0091] Figure 5 shows the experimental results. In Figure 5, the vertical axis represents the time-averaged value of the wind speed obtained from sensors placed near the inlet of the thread-running space S (see Figure 3) in each test specimen. In Figure 5, the horizontal axis represents the frequency of the motor 632 (see Figure 3) of the blower 63. The above experiment was conducted while changing the frequency of the motor 632 by changing the rotational speed of the motor 632 using the inverter device 633.

[0092] In Figure 5, "Test Specimen I" is the first extended duct 61 included in Test Specimen I, and "Test Specimen II" is the second extended duct 62 included in Test Specimen I. That is, for Test Specimen I, wind speed and frequency were measured in both the first extended duct 61 and the second extended duct 62. For Test Specimen III, wind speed and frequency were measured in both the first extended duct 61 and the second extended duct 62, and the average values ​​are shown in Figure 5.

[0093] Figure 5 shows that, particularly in the frequency range of 30 Hz and above, the wind velocity of the first test specimens I and II is higher than that of the second and third test specimens. Regarding the second test specimen, it is presumed that the lower wind velocity is due to the increased duct length (flow path length) resulting from combining the two extended ducts 61 and 62 into a single extended duct, which increased the pressure loss.

[0094] Figure 5 shows that there is variation in the wind speed corresponding to each frequency between the first test specimen I of the first extended duct 61 and the first test specimen II of the second extended duct 62. However, it is presumed that this variation can be reduced by appropriately adjusting the configuration of the connection parts (inclined ducts 71, 72, etc.) between each extended duct 61, 62 and the blower 63.

[0095] <Variation> Although preferred embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various design modifications are possible as long as they are within the scope of the claims.

[0096] For example, in order to further improve the cooling efficiency of the cooling device, the configuration described in Japanese Patent Publication No. 2023-012097 (configuration of the cooling unit, configuration of the slits formed in each extending duct, etc.) may be adopted.

[0097] The airflow generating device according to the present invention is not limited to being applied to cooling devices, but can also be applied to suction devices for sucking oil adhering to threads, and the like. 。

[0098] The blower may generate positive pressure in the first and second extending ducts. In this case, by providing a protrusion, the airflow sent from the blower to the intervening duct can be smoothly branched out to each extending duct by the protrusion.

[0099] The first and second extending ducts may extend in a direction slightly inclined with respect to the longitudinal direction of the main unit base, as long as they extend along the longitudinal direction of the main unit base. Furthermore, the first and second extending ducts are not limited to being straight along the longitudinal direction of the main unit base, but may have curved or bent portions. Moreover, the direction in which the first extending duct extends and the direction in which the second extending duct extends are not limited to being the same, but may intersect.

[0100] The ducts (first extending duct, second extending duct, first inclined duct, second inclined duct, and intervening duct) are not limited to a rectangular tubular shape, but may be cylindrical, for example.

[0101] In the embodiments described above, the protrusion is triangular in plan view (see Figure 4), but is not limited thereto. For example, the protrusion may be semicircular or rectangular in plan view. If the protrusion is rectangular in plan view, both the side surface on the first extending duct side and the side surface on the second extending duct side of the protrusion may extend along the longitudinal direction. [Explanation of symbols]

[0102] 1 False twisting machine 8 Main engine stand 14 Cooling device 31 Cooling Unit 32 Airflow Generator 61. First extended duct 61x one end 62 Second Extended Duct 62x one end 63 Blower 71. First Inclined Duct 71s Inner self 72. Second Inclined Duct 72s Inner self 73 Intermediate duct 73s Inner self 731 Protrusion 731a 1st slope 731b 2nd slope α1,α2 angle β1,β2 angle C Main engine base centerline L1 First virtual line L2 Second virtual line N intersection S thread running space V Space (the space between the first and second extending ducts) Centerline of ducts X1~X5

Claims

1. Main engine mount and Processing units arranged on one and the other sides in the width direction of the main machine base, each processing a plurality of threads arranged in the longitudinal direction of the main machine base, The processing section includes an airflow generating device, The aforementioned airflow generating device is A first extending duct is positioned on one side in the width direction relative to the main engine base and extends along the longitudinal direction, A second extending duct is positioned on the other side of the width direction relative to the main engine base and extends along the longitudinal direction, Includes a blower, The first and second extending ducts are arranged in parallel in the width direction. A false twisting machine characterized in that one end of the first extending duct in the longitudinal direction and one end of the second extending duct in the longitudinal direction are connected to the blower.

2. The aforementioned airflow generating device is A first inclined duct is positioned between the preceding first extending duct and the blower, The present invention further includes a second inclined duct disposed between the second extending duct and the blower, The first inclined duct is inclined with respect to the longitudinal direction such that, in the longitudinal direction, it approaches the blower from one end of the first extending duct, and in the width direction, it approaches the second extending duct from the first extending duct. The second inclined duct is inclined with respect to the longitudinal direction such that, as it approaches the blower from one end of the second extending duct in the longitudinal direction, it approaches the first extending duct from the second extending duct in the width direction. The false twisting machine according to claim 1, characterized in that the angle formed by the center line of the first extending duct and the center line of the first inclined duct, on the side facing the space between the first extending duct and the second extending duct which are spaced apart from each other in the width direction, and the angle formed by the center line of the second extending duct and the center line of the second inclined duct, on the side facing the space, are both obtuse angles.

3. The airflow generating device further includes an intervening duct interposed between the first inclined duct and the blower and between the second inclined duct and the blower, The false twisting machine according to claim 2, characterized in that the angle formed by the center line of the first inclined duct and the center line of the intervening duct on the side facing the space, and the angle formed by the center line of the second inclined duct and the center line of the intervening duct on the side facing the space, are both obtuse angles.

4. The airflow generating device further includes an intervening duct that is interposed 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 false twisting machine according to claim 1, characterized in that the intervening duct has a projection on its inner surface opposite to the blower in the longitudinal direction, which protrudes toward the blower.

5. The aforementioned protrusion is In the width direction, on the first extending duct side, there is a first inclined surface that is inclined with respect to the longitudinal direction such that, as it approaches the blower from the inner surface in the longitudinal direction, it approaches the second extending duct from the first extending duct in the width direction. The false twisting machine according to claim 4, characterized in that, in the width direction, it has a second inclined surface on the second extending duct side, which is inclined with respect to the longitudinal direction such that, as it approaches the blower from the inner surface in the longitudinal direction, it approaches the first extending duct from the second extending duct in the width direction.

6. The aforementioned airflow generating device is A first inclined duct is positioned between the preceding first extending duct and the intervening duct, The present invention further includes a second inclined duct disposed between the second extending duct and the intervening duct, The first inclined duct is inclined with respect to the longitudinal direction such that, in the longitudinal direction, it approaches the intervening duct from one end of the first extending duct, and in the width direction, it approaches the second extending duct from the first extending duct. The second inclined duct is inclined with respect to the longitudinal direction such that, in the longitudinal direction, it approaches the intervening duct from one end of the second extending duct, and in the width direction, it approaches the first extending duct from the second extending duct. The false twisting machine according to claim 4 or 5, characterized in that the protruding portion protrudes toward the blower from a point beyond the intersection of a first imaginary straight line along the inner surface of the first inclined duct opposite to the blower in the longitudinal direction and a second imaginary straight line along the inner surface of the second inclined duct opposite to the blower in the longitudinal direction, in a plane parallel to the longitudinal direction and the width direction.

7. The false twisting machine according to any one of claims 4 to 6, characterized in that the protruding portion is provided over the entire vertical direction perpendicular to both the width direction and the longitudinal direction of the intervening duct.

8. The false twisting machine according to any one of claims 1 to 7, characterized in that the airflow generating device has a shape symmetrical with respect to a center line extending in the longitudinal direction through the center in the width direction of the main machine base.

9. The false twisting machine according to any one of claims 1 to 8, characterized in that the blower generates negative pressure in the first extended duct and the second extended duct.

10. A cooling device included in the processing section, comprising: an airflow generating device; and a cooling unit that communicates with the first extending duct and the second extending duct and has a yarn running space formed therein through which the plurality of yarns run. The false twisting machine according to any one of claims 1 to 9, characterized in that the cooling device supplies cooling air to the yarn running space via the first extended duct and the second extended duct by driving the blower.

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