Interlacing device and thread winder

Abstract

The present invention relates to a twisting device and a thread winder. Even if the pressure or flow rate of a fluid is not increased, the efficiency of applying twisting to a thread can be improved. A twisting device (30) is provided with a twisting section (32), a restriction thread guide (33) (restriction section), and a widening thread guide (50) (widening section). The twisting section has a thread travel space (43) for causing a thread (Y) to travel in a prescribed first direction. Furthermore, the twisting section has a jet hole (41a) that jets compressed air (fluid) against the thread travel space in a second direction that intersects the first direction. The restriction thread guide is disposed at a position that is separated from the twisting section in the first direction and restricts movement of the thread in a third direction that intersects the second direction when viewed from the first direction. The widening thread guide is disposed between the twisting section and the restriction thread guide in the first direction and widens the thread that travels in the thread travel space in the third direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a false-twist device and a thread winder provided with the false-twist device. BACKGROUND

[0002] The spinning draft device (thread winder) described in Patent Document 1 is provided with a false-twist device that applies false-twist to a thread having a plurality of filaments by a fluid. The false-twist device has a false-twist section that is formed with a thread travel space extending along a prescribed direction and a jet hole for jetting the fluid to the thread travel space. Further, a first restriction section (restriction section) is arranged on both sides of the prescribed direction of the false-twist section. The restriction section is configured such that, when viewed from the prescribed direction, the thread is arranged at a center portion of the thread travel space. In such a false-twist device, when the fluid is jetted to the thread travel space through the jet hole, the thread is opened and twisted by the action of the fluid. Thereby, a region (false-twist point) in which the filaments are entangled with each other is formed at a substantially constant pitch.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2016-160550

[0004] It is generally known that the distance between the false-twist points is difficult to be completely controlled and a certain degree of variation occurs. When there is a portion in which the distance between the false-twist points is long (i.e., a portion in which the filaments are easily separated from each other) in the thread, the following problem can occur. For example, in a package in which the thread is wound on a bobbin, the thread of the outer layer is easily hooked on the thread of the inner layer. Thereby, it can be impossible to normally unwind the thread from the package. In order to suppress such a problem, it is necessary to more efficiently apply false-twist to the thread. However, in the case where the pressure or the flow rate of the fluid is simply increased, the force against the thread becomes too strong, and problems such as a decrease in the quality of the thread due to the contact of the thread with the inner wall surface of the thread travel space and / or an increase in the running cost can occur. SUMMARY

[0005] An object of the present application is to improve the efficiency of applying false-twist to a thread even without increasing the pressure or the flow rate of a fluid.

[0006] The twisting device of the first invention is characterized by comprising: a twisting section that has a yarn travel space for a yarn to travel in a predetermined first direction and a jet hole that jets a fluid toward the yarn travel space in a second direction intersecting the first direction, and that applies twisting to the yarn by the fluid jetted from the jet hole toward the yarn travel space; a restriction section that is disposed at a position separated from the twisting section in the first direction, and that restricts movement of the yarn in a third direction intersecting the second direction when viewed from the first direction; and a widening section that is disposed between the twisting section and the restriction section in the first direction, and that widens the yarn traveling in the yarn travel space in the third direction.

[0007] In the invention, the center position of the yarn in the third direction can be regulated by the restriction section. Also, the yarn traveling in the yarn travel space is widened in the third direction by the widening section. Thus, the fluid jetted from the jet hole in the second direction can be efficiently brought into contact with the yarn. Therefore, the fluid can be effectively applied to the yarn without increasing the pressure or flow rate of the fluid, and the yarn can be efficiently separated and twisted. Thus, the efficiency of applying twisting to the yarn can be improved without increasing the pressure or flow rate of the fluid.

[0008] The twisting device of the second invention is characterized in that, in the first invention, the widening section widens the yarn in the third direction so that the width of at least the portion of the yarn traveling in the yarn travel space is greater than the width of the portion of the yarn restricted by the restriction section.

[0009] In the invention, the width of the yarn widened by the widening section in the third direction is greater than the width of the yarn regulated by the restriction section in the related art. Thus, the fluid jetted from the jet hole can be efficiently brought into contact with the yarn.

[0010] The twisting device of the third invention is characterized in that, in the first or second invention, the widening section widens the yarn so that the difference between the width of the yarn in the third direction and the size of the jet hole in the third direction is reduced.

[0011] In the invention, the fluid jetted from the jet hole can be maximally efficiently brought into contact with the yarn.

[0012] The twisting device of the fourth invention is characterized in that, in any one of the first to third inventions, the widening section has a rod-shaped widening guide that extends in the third direction.

[0013] In the present application, the yarn traveling in the first direction is given resistance by the rod-shaped widening guide, and thus the yarn can be widened in the third direction. Thus, the yarn can be widened by a simple configuration.

[0014] The intertwining device of the fifth application is characterized in that, in any one of the first to fourth applications described above, at least a part of the contact portion of the widening portion that contacts the yarn is disposed at a position overlapping the yarn traveling space when viewed from the first direction.

[0015] The contact portion of the widening portion that contacts the yarn can not necessarily be disposed at a position overlapping the yarn traveling space when viewed from the first direction. However, in such a case, in order to properly guide the yarn into the yarn traveling space, another guide needs to be disposed between the intertwining portion and the widening portion in the first direction. In the present application, the widening portion also functions as a guide that properly guides the yarn into the yarn traveling space. Thus, the configuration of the intertwining device can be simplified.

[0016] The intertwining device of the sixth application is characterized in that, in any one of the first to fifth applications described above, the widening portion is curved at the contact portion that contacts the yarn.

[0017] In the present application, the widening portion can be suppressed from damaging the yarn traveling, as compared with the case where the contact portion has an angle. Thus, the yarn breakage can be suppressed.

[0018] The intertwining device of the seventh application is characterized in that, in any one of the first to sixth applications described above, the widening portion does not rotate.

[0019] In a configuration in which the widening portion rotates in correspondence with the traveling of the yarn, the efficiency of giving resistance to the yarn decreases, and the yarn becomes difficult to widen. In the present application, the widening portion does not rotate, and thus the yarn can be given resistance efficiently. Thus, the yarn can be widened efficiently.

[0020] The yarn winding machine of the eighth application is characterized by comprising: the intertwining device of any one of the first to seventh applications; and a winding portion that winds the yarn to which intertwining has been applied by the intertwining device to form a package.

[0021] In the present application, the yarn to which intertwining has been applied stably can be used to form a package. Thus, the generation of yarn uncoiling defects due to the outer layer yarn of the package hooking the inner layer yarn can be suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a side view of a spinning draw frame provided with the intertwining device of the present embodiment.

[0023] Figure 2is a side view cross-sectional view of the interlacing device.

[0024] Figure 3 is Figure 2 a III-III line cross-sectional view of

[0025] Figure 4 is Figure 2 a IV-IV line cross-sectional view of

[0026] Figure 5 (a) of is an explanatory view showing an interlacing point of a yarn, and (b) is an explanatory view showing a cross section of the yarn.

[0027] Figure 6 is a cross-sectional view of the interlacing device of Comparative Example 1.

[0028] Figure 7 is a cross-sectional view of the interlacing device of Comparative Example 2.

[0029] Figure 8 (a) of is an explanatory view showing a cross-sectional shape of a yarn of an embodiment, and (b), (c) are explanatory views showing cross-sectional shapes of yarns of comparative examples.

[0030] Figure 9 is a table showing evaluation results of distances between interlacing points.

[0031] Figure 10 is a cross-sectional view of the interlacing device of a modification example orthogonal to the first direction.

[0032] Figure 11 is a cross-sectional view of the interlacing device of a modification example orthogonal to the left-right direction.

[0033] Figure 12 is a XII-XII line cross-sectional view of Figure 11

[0034] Explanation of symbols

[0035] 1 Spinning draw machine (yarn winding machine)

[0036] 30 Interlacing device

[0037] 32 Interlacing section

[0038] 33 Restriction guide (restriction section)

[0039] 41 First interlacing piece

[0040] 41b Injection hole

[0041] 43 Yarn traveling space

[0042] 50 Widening guide (widening section)

[0043] ​51a contact portion

[0044] 52a contact portion

[0045] f filament

[0046] P package

[0047] Y yarn DETAILED DESCRIPTION

[0048] Next, an embodiment of the present application will be described. For ease of explanation, the directions shown in FIG. 1 will be taken as the up-down direction and the front-rear direction. The up-down direction is the vertical direction in which the force of gravity acts. The front-rear direction is orthogonal to the up-down direction and is the direction in which the plurality of bobbins B (described later) are arranged. The direction orthogonal to both the up-down direction and the front-rear direction will be taken as the left-right direction. The direction in which the yarn Y (described later) travels will be taken as the yarn travel direction. Figure 1

[0049] (spinner)

[0050] Reference Signs List Figure 1 A general outline of the spinning draw frame 1 (yarn winder of the present application) of the present embodiment will be described. Figure 1 is a side view of the spinning draw frame 1 provided with the interlacing device 30 (described later) of the present embodiment. The spinning draw frame 1 is configured to draw a plurality of yarns Y spun from the spinning device 2 to be wound on a plurality of bobbins B, respectively, and to form a plurality of packages P. Each yarn Y is a multifilament yarn having a plurality of filaments f (refer to (a), (b) of FIG. 2). Each filament f is, for example, a synthetic fiber composed of polyester fiber. Figure 5

[0051] ​​The spinning draft machine 1 has a draft section 3 and a winding section 4. The draft section 3 is configured to draft a plurality of yarns Y spun from the spinning device 2. The draft section 3 has, for example, a stretching device 10, a first godet 11, a second godet 12, and a false twister 13. The stretching device 10 is disposed below the spinning device 2. The stretching device 10 is configured to have a plurality of stretching rollers (not shown) that stretch the yarns Y. The first godet 11 is a roller whose rotational axis direction is substantially parallel to the left-right direction. The first godet 11 is disposed below the stretching device 10. The first godet 11 is rotationally driven by a motor (not shown). The plurality of yarns Y spun from the spinning device 2 are fed to the second godet 12 in a state of being wound around the first godet 11 in alignment in the left-right direction. The second godet 12 is a roller whose rotational axis direction is substantially parallel to the left-right direction. The second godet 12 is disposed above and behind the first godet 11. The second godet 12 is rotationally driven by a motor (not shown). The plurality of yarns Y are fed from the first godet 11 to the second godet 12 and further to the winding section 4. A yarn passage through which the yarn Y advancing from the first godet 11 to the second godet 12 passes extends obliquely upward to the rear. The yarn passage has components in both the up-down direction and the front-rear direction, and is substantially orthogonal to the left-right direction. The false twister 13 is disposed, for example, between the stretching device 10 and the first godet 11 in the yarn advancing direction. Alternatively, the false twister 13 can be disposed between the first godet 11 and the second godet 12 in the yarn advancing direction. The false twister 13 is configured to apply false twisting to the plurality of yarns Y, respectively (details will be described later).

[0052] The winding section 4 is configured to wind the plurality of yarns Y around a plurality of bobbins B to form a package P. The winding section 4 is disposed below the draft section 3. The winding section 4 has a plurality of point godets 21, a plurality of traverse godets 22, a turret 23, two bobbin holders 24, and a contact roller 25.

[0053] The plurality of fulcrum thread guides 21 are thread guides that become the fulcrum when the thread Y is traversed by the traverse thread guides 22. The plurality of fulcrum thread guides 21 are provided corresponding to the plurality of threads Y, respectively. The plurality of fulcrum thread guides 21 are arranged in the front-rear direction. As with the plurality of fulcrum thread guides 21, the plurality of traverse thread guides 22 are provided corresponding to the plurality of threads Y, respectively. The plurality of traverse thread guides 22 are arranged in the front-rear direction. The traverse thread guides 22 are configured to be driven by a traverse motor not shown, for example, thereby causing the thread Y to traverse in the front-rear direction. The turret 23 is a circular plate-like member whose rotation axis direction is substantially parallel to the front-rear direction. The turret 23 is rotationally driven by a turret motor not shown. The two bobbin holders 24 are each a member whose rotation axis direction is substantially parallel to the front-rear direction, and are rotatably supported at the upper end and the lower end of the turret 23, respectively. On each of the bobbin holders 24, a plurality of bobbins B corresponding to the plurality of threads Y, respectively, are mounted in the front-rear direction. The plurality of bobbins B are rotatably supported by the bobbin holders 24. The two bobbin holders 24 are each independently rotationally driven by a take-up motor not shown. The contact roller 25 is a roller whose rotation axis direction is substantially parallel to the front-rear direction, and is disposed immediately above the upper bobbin holder 24. The contact roller 25 is brought into contact with the surface of the plurality of packages P supported by the upper bobbin holder 24, thereby applying contact pressure to the surface of the package P under take-up to adjust the shape of the package P.

[0054] In the take-up section 4 having the above configuration, when the upper bobbin holder 24 is rotationally driven, the thread Y traversed by the traverse thread guides 22 is taken up to the bobbins B to form the package P. Further, in the case where the package P becomes a full package, the upper and lower positions of the two bobbin holders 24 are replaced by rotating the turret 23. Thereby, the lower bobbin holder 24 moves to the upper side, and the thread Y can be taken up to the bobbins B mounted to the bobbin holder 24 to form the package P. Further, the bobbin holder 24 on which the package P that has become a full package is mounted moves to the lower side. The package P that has become a full package is recovered by a package recovery device not shown, for example.

[0055] (Winding unit)

[0056] Next, the configuration and functions of the winding unit 13 will be described with reference to Figures 2-5 The configuration and functions of the winding unit 13 will be described. Figure 2 is a cross-sectional view of the winding device 30 described later, taken in a direction orthogonal to the left-right direction. Figure 3 is a III-III line cross-sectional view of Figure 2 Figure 4 is a IV-IV line cross-sectional view of Figure 2 Figure 5 (a) of is an explanatory view showing a winding point Pi (described later) of the thread Y.(b) of is an explanatory view illustrating a cross section of the thread Y. In Figure 5 Figure 2 ​​Hereinafter, the thickness of the entire yarn Y is taken into account, and attention is paid to the case where the end portions of the two outer sides of the yarn Y are indicated by a double-dot chain line (details will be described later).

[0057] The interlacing unit 13 is configured to apply interlacing to the plurality of yarns Y, respectively, by compressed air (fluid of the present application). The so-called application of interlacing generally means that the plurality of filaments f (refer to Figure 5 (a) and (b) of the drawing) constituting each yarn Y are interwoven so as to suppress the excessive separation of the plurality of filaments f from each other.

[0058] In the present embodiment, for the sake of convenience of explanation, it is assumed that the interlacing unit 13 has a plurality of interlacing devices 30. In the present embodiment, the plurality of interlacing devices 30 apply interlacing to one yarn Y, respectively. In the following, only one interlacing device 30 of the plurality of interlacing devices 30 will be described. Hereinafter, a direction in which the interlacing portion 32 to be described later is longer will be referred to as a first direction. Figure 2 the right side of the paper surface is one side in the first direction, Figure 2 the left side of the paper surface is the other side in the first direction. In the spinning draw frame 1, the first direction is substantially parallel to a yarn passage of the yarn Y advancing from the drawing device 10 toward the first godet 11 (refer to Figure 1 ). A direction orthogonal to both the first direction and the left-right direction will be referred to as a height direction of the interlacing device 30 (hereinafter, simply referred to as the height direction). Figure 2 the upper side of the paper surface is one side in the height direction, Figure 2 the lower side of the paper surface is the other side in the height direction. A nozzle extension direction in which the injection hole 41b to be described later extends will be referred to as a second direction. In the present embodiment, the left-right direction will also be referred to as a third direction. When viewed from the first direction, the third direction is orthogonal to (crosses) the second direction (refer to Figure 4 ).

[0059] As shown in Figure 2 , the interlacing device 30 has a base member 31, an interlacing portion 32, and two yarn guide restrictors 33 (yarn guide restrictors 34, 35. Restriction portions of the present application). The base member 31 is, for example, a plate-like member extending along the first direction and the left-right direction (third direction). The interlacing portion 32 and the yarn guide restrictors 34, 35 are fixed to a surface on the height direction one side of the base member 31. A flow path 31a through which compressed air flows is formed in the base member 31. The flow path 31a is connected to a compressed air source not shown.

[0060] As shown in Figure 2 , the interlacing portion 32 extends along the first direction. The interlacing portion 32 has, for example, a first interlacing piece 41 and a second interlacing piece 42 (refer to Figure 2 and Figure 4The first interlocking piece 41 is a generally rectangular parallelepiped component. The first interlocking piece 41 extends along the first direction. The first interlocking piece 41 is fixed to the base component 31. On one side of the first interlocking piece 41 in the height direction (i.e., the side farther from the base component 31 in the height direction), a generally U-shaped recess 41a is formed (see reference). Figure 4 The recess 41a extends over the entire area of ​​the first interlocking piece 41 in the first direction. The second interlocking piece 42 is a generally rectangular parallelepiped component. The second interlocking piece 42 extends along the first direction. The second interlocking piece 42 is fixed to one side of the first interlocking piece 41 in the height direction (i.e., the side farther from the base member 31 in the height direction). On the other side of the second component in the height direction (i.e., the side closer to the base member 31 in the height direction), a recess 42a that is generally inverted U-shaped when viewed from the first direction is formed (see reference). Figure 4 The recess 42a extends over the entire area of ​​the second interlocking plate 42 in the first direction. A thread travel space 43 is formed through the recesses 41a of the first interlocking plate 41 and 42a of the second interlocking plate 42, allowing the thread Y to travel in the first direction. Furthermore, a slit 44 is formed along the first direction through the first interlocking plate 41 and the second interlocking plate 42. When the thread Y is hooked onto the interlocking device 30 (i.e., during thread hooking), the thread Y is inserted into the thread travel space 43 from the external space through the slit 44.

[0061] like Figure 2 As shown, for example, a jetting hole 41b is formed in the central portion of the first interlocking piece 41 in the first direction and on the other side in the height direction (i.e., the portion closer to the base member 31 in the height direction). The nozzle extension direction (second direction) to which the jetting hole 41b extends has, for example, a component in the height direction and a component in the first direction. The jetting hole 41b is connected to both the flow path 31a and the filament travel space 43.

[0062] Two wire guides 33 (wire guides 34 and 35) are configured to restrict the movement of the wire Y in the third direction. Each wire guide 33 is, for example, a flat plate extending along the height direction. Each wire guide 33 is fixed to the surface of the base member 31 on one side in the height direction. Each wire guide 33 is positioned separately from the interlocking portion 32 in the first direction. Wire guide 34 is positioned on one side of the interlocking portion 32 in the first direction (upstream side in the wire travel direction). Wire guide 35 is positioned on the other side of the interlocking portion 32 in the first direction (downstream side in the wire travel direction). Each wire guide 33 has, for example, a groove 33a that is approximately U-shaped when viewed from the first direction. Side surfaces 33b (see reference) are formed on both sides of the groove 33a in the left-right direction. Figure 3The width of the groove 33a in the third direction (the distance between the two side surfaces 33b in the third direction) is, for example, W1 Figure 3 Referring to FIG. 6, the movement of the yarn Y to both sides in the third direction is restricted by the groove 33a. Thus, the center position of the yarn Y traveling in the yarn traveling space 43 in the third direction is defined.

[0063] In the entangling device 30 having the above configuration, when the compressed air supplied from the compressed air source is injected into the yarn traveling space 43 through the flow path 31a and the injection hole 41b, the jet flow comes into contact with the yarn Y (the plurality of filaments f) traveling in the yarn traveling space 43. The plurality of filaments f is expanded (defibered) and entangled by the jet flow in the yarn traveling space 43. As a result thereof, the region in which the plurality of filaments f is entangled with each other (the entanglement point Pi. Referring to FIG. 6) is formed. Figure 5 The entanglement point Pi moves to the downstream side in the yarn traveling direction as the yarn Y travels. The plurality of filaments f is defibered and entangled again at a position different from the entanglement point Pi and is defibered and entangled again at the entanglement point Pi as a convergence point. By repeating this action, a plurality of entanglement points Pi is formed at substantially constant intervals on the yarn Y.

[0064] Here, it is generally known that the distance between the entanglement points Pi is difficult to be completely controlled and there is a certain degree of variation. When there is a portion in which the distance between the entanglement points Pi is long (i.e., a portion in which the filaments f are easily separated from each other), the following problem can occur. For example, in the package P formed by winding the yarn Y on the bobbin B, the yarn Y of the outer layer (the layer on the radially outer side of the package P) becomes likely to be hooked on the yarn Y of the inner layer (the layer on the radially inner side of the package P). Thus, in the subsequent process, it can become impossible to normally unwind the yarn Y from the package P. In order to suppress such a problem, it is necessary to more efficiently apply entanglement to the yarn Y. However, in the case where the pressure or the flow rate of the compressed air is simply increased, the force on the yarn Y becomes too strong, and problems such as a decrease in the quality of the yarn Y due to contact with the inner wall surface of the yarn traveling space 43 and / or an increase in the running cost occur. Therefore, in the present embodiment, the efficiency of applying entanglement to the yarn Y can be improved even without increasing the pressure or the flow rate of the compressed air, and thus the entangling device 30 further has the following configuration.

[0065] (Widening guide)

[0066] As Figure 2 and Figure 3As shown, the interlacing device 30 has two widened guides 50 (widened guides 51, 52. Widened portions of the present application). The widened guides 51, 52 are, for example, round bar-shaped (rod-shaped) members extending in the third direction. The widened guides 51, 52 are non-rotatably mounted to the base member 31. The widened guide 51 is disposed on the other side of the first direction of the restricting guide 34 (downstream side of the thread travel direction) and on the one side of the first direction of the interlacing portion 32 (upstream side of the thread travel direction). In other words, the widened guide 51 is disposed between the restricting guide 34 and the interlacing portion 32 in the first direction. The widened guide 52 is disposed on the other side of the first direction of the interlacing portion 32 (downstream side of the thread travel direction) and on the one side of the first direction of the restricting guide 35 (upstream side of the thread travel direction). In other words, the widened guide 52 is disposed between the interlacing portion 32 and the restricting guide 35 in the first direction. The widened guides 51, 52 are disposed so that, when viewed from the first direction, a part thereof overlaps the thread travel space 43. Thus, the widened guides 51, 52 come into contact with the thread Y traveling. The widened guides 51, 52 are disposed so that the end portion on the one side in the height direction (i.e., the end portion on the side farther from the base member 31 in the height direction) comes into contact with the thread Y. The thread Y is bent by the widened guides 51, 52. Further, as shown, the widened guides 51, 52 are disposed so that the end portion on the other side in the height direction (i.e., the end portion on the side closer to the base member 31 in the height direction) is positioned in the thread travel space 43. Thus, the thread Y is bent by the widened guides 51, 52 so as to be positioned in the thread travel space 43. Figure 2 As shown, the cross section of the widened guides 51, 52 orthogonal to the third direction is, for example, substantially circular. In other words, the contact portion 51a of the widened guide 51 coming into contact with the thread Y and the contact portion 52a of the widened guide 52 coming into contact with the thread Y are curved in a convex shape. The widened guide 51 is disposed so that, when viewed from the first direction, at least a part of the contact portion 51a overlaps the thread travel space 43. Likewise, the widened guide 52 is disposed so that, when viewed from the first direction, at least a part of the contact portion 52a overlaps the thread travel space 43. Thus, the widened guides 51, 52 also function as guides for appropriately guiding the thread Y into the thread travel space 43.

[0067] The thread Y traveling comes into contact with the widened guide 51 disposed on the upstream side of the thread travel direction of the interlacing portion 32, whereby the thread Y is subjected to a resistance by the widened guide 51. Thus, the thread Y is widened in the third direction. More specifically, the portion of the thread Y traveling on the downstream side of the thread travel direction of the widened guide 51 and on the upstream side of the thread travel direction of the widened guide 52 is widened in the third direction (refer to FIG. 6). Figures 2-4 As the specific shape of the thread Y within the thread travel space 43, the cross section of the thread Y having a plurality of filaments f becomes a flat shape larger in the third direction and smaller in the second direction as a whole (refer to FIG. 6). Figure 4). As the degree of widening by the widening guide 50, it is preferable that the width of the yarn Y traveling in the yarn traveling space 43 in the third direction be larger than the width of the portion of the yarn Y restricted by the restriction guide 33 in the third direction (for example, W1 described above). Further, when the size of the injection hole 41b in the third direction is set to W2 larger than W1 (refer to Figure 4 ), it is preferable that the yarn Y be widened so that the width of the yarn Y in the third direction within the yarn traveling space 43 substantially coincides with (is close to) W2.

[0068] By thus widening the yarn Y, the area of the portion of the yarn Y traveling in the yarn traveling space 43 facing the injection hole 41b in the second direction becomes large. Thereby, it is possible to efficiently inject the compressed air to the yarn Y. Therefore, even without increasing the pressure or the flow rate of the compressed air, it is possible to effectively act the injection flow of the compressed air on the yarn Y. Thereby, the present inventors believe that it is possible to efficiently open the yarn Y and twist it compared to the past, and it is possible to improve the efficiency of applying the twist to the yarn Y.

[0069] (Evaluation of the efficiency of applying the twist)

[0070] In order to confirm the case where the efficiency of applying the twist to the yarn Y by the above-described twist applying device 30 is actually improved, the present inventors performed the following evaluation. As an outline, the present inventors prepared two kinds of twist applying devices as examples (Examples 1, 2. Details will be described later), and prepared two kinds of twist applying devices as comparative examples (Comparative Examples 1, 2. Details will be described later). The present inventors produced four kinds of yarns Y using the above-described total of four kinds of twist applying devices in a spinning draft machine having the same configuration as the spinning draft machine 1, respectively. Also, the present inventors counted the number of twist points Pi formed per predetermined length in these yarns Y, and evaluated the efficiency of applying the twist.

[0071] Hereinafter, the following will be described with reference to Figures 6-9 The details of the evaluation will be described. Figure 6 is a sectional view of the twist applying device 100 of Comparative Example 1. Figure 7 is a sectional view of the twist applying device 100 of Comparative Example 2. Figure 8 (a) of is an explanatory view showing the cross-sectional shape of the yarn Y of Examples 1, 2. Figure 8 (b) of is an explanatory view showing the cross-sectional shape of the yarn Y of Comparative Example 1. Figure 8 (c) of is an explanatory view showing the cross-sectional shape of the yarn Y of Comparative Example 2. Figure 9 is a table showing the evaluation results of the efficiency of applying the twist to the yarn Y.

[0072] First, the details of the twisting device of the examples and the comparative examples will be described. The twisting device of Example 1 and the twisting device of Example 2 each have the same configuration as the twisting device 30. In either of Example 1 and Example 2, the yarn Y in the yarn running space 43 is widened in the third direction (refer to (a) of Figure 8 ). For the sake of explanation, the cross-sectional shape of such yarn Y is referred to as "lateral flat" (refer to Figure 9 ). The difference between Example 1 and Example 2 is as follows. In Example 1, the width of the slot 33a of the restriction guide 33 in the third direction (i.e., W1) is 0.5 mm (refer to Figure 9 ). In Example 2, W1 is 1.0 mm (refer to Figure 9 ), which is larger than W1 in Example 1.

[0073] The twisting device of Comparative Example 1 becomes a configuration without the widening guide 50. The configuration of this twisting device is the same as the twisting device 100 shown in Figure 6 . The twisting device 100 is substantially the same as the device after the widening guide 50 is removed from the twisting device 30. In Comparative Example 1, the yarn Y is not widened (refer to (b) of Figure 6 and Figure 8 ). In Comparative Example 1, the above-mentioned W1 is also 0.5 mm as in Example 1. The twisting device of Comparative Example 2 has the same configuration as the twisting device 100 described in Figure 7 . In Comparative Example 2, as shown in Figure 7 , the twisting device 100 as a whole is tilted to the left and right directions with respect to the yarn passage from the first guide roller 11 toward the second guide roller 12. In other words, the first direction is tilted to the left and right directions. That is, the first direction is not orthogonal to the left and right directions. The tilt angle is about 7 degrees. Thus, in Comparative Example 2, the yarn Y is pressed on the side surface 33b of the restriction guide 33. Therefore, the yarn Y is subjected to a resistance force by the side surface 33b. Thus, in Comparative Example 2, the yarn Y is widened in the direction orthogonal to the third direction (refer to (c) of Figure 8 ). For the sake of comparison with Example 1 and 2, the cross-sectional shape of such yarn Y is referred to as "vertical flat". In Comparative Example 2, the above-mentioned W1 is also 0.5 mm as in Example 1.

[0074] The production conditions of the yarn Y were the same in Examples 1 and 2 and Comparative Examples 1 and 2 except for the differences in the interlacing devices described above. The common conditions are described below. The kind of the yarn Y was polyester fiber. The thickness of the yarn Y was 83 dtex. The number of filaments included in the yarn Y was 36. The pressure of the compressed air supplied to each interlacing device was 0.35 MPa. These common conditions were appropriately decided only for the purpose of actually comparing the application efficiency of interlacing. That is, it is to be noted that the same comparison results can be expected even in the case where these common conditions are changed.

[0075] Next, the evaluation method of the efficiency of applying interlacing to the yarn Y is described. The present inventors counted the number of interlacing points Pi over a prescribed length (1000 m) and measured the distance between the interlacing points Pi in each of the above-described four kinds of yarn Y. The counting of the number and the measurement of the distance were specifically performed as follows. That is, the interlacing points Pi included in the yarn Y running from the formed package P were detected by an interlacing detection device, ITEMAT+ (trademark) manufactured by Textechno Co. On this basis, the number information of the interlacing points Pi and the distance information between the interlacing points Pi were stored in a computer device not shown. These information was used to evaluate the application efficiency of interlacing.

[0076] In Figure 9 the number of interlacing points Pi per unit length (1 m) (hereinafter, referred to as average interlacing number) is shown for Examples 1 and 2 and Comparative Examples 1 and 2. The more the average interlacing number, the shorter the average distance between the interlacing points Pi, and it can be evaluated that interlacing is applied to the yarn Y more efficiently. The average interlacing number of Example 1 was 18.5 pieces / m. The average interlacing number of Example 2 was 19.2 pieces / m. The average interlacing number of Comparative Example 1 was 18.3 pieces / m. The average interlacing number of Comparative Example 2 was 17.2 pieces / m.

[0077] From the above results, at least two conclusions can be drawn. As the first conclusion, when comparing Example 1 and Comparative Examples 1 and 2 where W1 is the same, the wider the width of the yarn Y in the third direction, the more the average interlacing number. It can be considered that the reason for this is that, as described above, since the yarn Y is widened in the third direction, the jet stream can efficiently contact the yarn Y. As the second conclusion, when comparing Example 1 and Example 2 where W1 is different from each other, the average interlacing number is more in Example 2 where W1 is wider. It can be considered that the reason for this is that, in the case where the width in the third direction before the yarn Y is widened is wider to some extent, the yarn Y is easily further widened by the widening guide 50.

[0078] As above, the center position of the yarn Y in the third direction can be regulated by the restricting guide 33. Also, the yarn Y can travel in the yarn travel space 43 in a state widened in the third direction by the widening guide 50. Thereby, the compressed air injected toward the second direction by the injection hole 41b can be efficiently brought into contact with the yarn Y. Therefore, even if the pressure or the flow rate of the compressed air is not increased, the compressed air can be effectively applied to the yarn Y, and the yarn Y can be efficiently separated and twisted. Thereby, the efficiency of applying the twist to the yarn Y can be improved even if the pressure or the flow rate of the compressed air is not increased.

[0079] Further, in the third direction, the width of the yarn Y widened by the widening guide 50 is larger than the width of the yarn Y regulated by the restricting guide 33 in the past. Thereby, the compressed air injected by the injection hole 41b can be efficiently brought into contact with the yarn Y.

[0080] Further, the widening guide 50 widens the yarn Y so that the width of the yarn Y in the third direction substantially coincides with the size (W2) of the injection hole 41b in the third direction (approaches W2, that is, the difference between the width of the yarn Y in the third direction and W2 is reduced). Thereby, the compressed air injected by the injection hole 41b can be maximally efficiently brought into contact with the yarn Y.

[0081] Further, by applying the resistance to the yarn Y traveling in the first direction by the rod-shaped widening guide 50, the yarn Y can be widened in the third direction. Thereby, the yarn Y can be widened by a simple configuration.

[0082] Further, the contact portion 51a of the widening guide 51 and the contact portion 52a of the widening guide 52 are disposed at positions overlapping with the yarn travel space when viewed from the first direction. Thereby, the widening guide 51 and the widening guide 52 can also function as guides that appropriately introduce the yarn Y into the yarn travel space 43. Thereby, the configuration of the twisting device 30 can be simplified.

[0083] Further, the contact portion 51a of the widening guide 51 and the contact portion 52a of the widening guide 52 are disposed at positions overlapping with the yarn travel space when viewed from the first direction. Thereby, the widening guide 51 and the widening guide 52 can also function as guides that appropriately introduce the yarn Y into the yarn travel space 43. Thereby, the configuration of the twisting device 30 can be simplified.

[0084] Further, the contact portion 51a of the widening guide 51 and the contact portion 52a of the widening guide 52 are disposed at positions overlapping with the yarn travel space when viewed from the first direction. Thereby, the widening guide 51 and the widening guide 52 can also function as guides that appropriately introduce the yarn Y into the yarn travel space 43. Thereby, the configuration of the twisting device 30 can be simplified.

[0085] Further, by the spinning draft machine 1 provided with the interlacing device 30, it is possible to form a package P using a yarn Y to which interlacing is stably applied. Therefore, it is possible to suppress the take-up failure of the yarn Y due to the yarn Y of the outer layer of the package P catching the yarn Y of the inner layer.

[0086] Next, a modified example in which the above-described embodiment is changed will be described. In the modified example, the same symbols are given to portions having the same configuration as the above-described embodiment, and the description thereof will be appropriately omitted.

[0087] (1) In the above-described embodiment, the end portion of the height direction one side of the both of the widened guides 51, 52 (i.e., the end portion of the side far from the base member 31 in the height direction) is configured to be in contact with the yarn Y, but is not limited thereto. It can also be configured that the end portion of the height direction other side (i.e., the end portion of the side close to the base member 31 in the height direction) of one or both of the widened guides 51, 52 is in contact with the yarn Y. In such a configuration, it is also possible to widen the yarn Y in the third direction by applying a resistance to the yarn Y.

[0088] (2) In the above-described embodiment, the widened guide 50 is configured not to be able to rotate, but is not limited thereto. For example, the widened guide 50 can also be a roller configured to be able to rotate as a driven rotation in the third direction. Further, in such a configuration, in a case where the widened guide 50 is able to rotate at the same circumferential speed as the traveling speed of the yarn Y, it is difficult to apply a resistance to the yarn Y, and thus the yarn Y is difficult to be widened. Therefore, it is preferable to provide a resistance applying portion (not shown) that applies a resistance to the rotation of the widened guide 50. Thereby, it is possible to widen the yarn Y in the third direction while suppressing the abrasion of the widened guide 50 due to the rubbing of the yarn Y.

[0089] (3) In the above-described embodiment, the contact portion 51a of the widened guide 51 and the contact portion 52a of the widened guide 52, which are in contact with the yarn Y, are curved, but are not limited thereto. The contact portions 51a, 52a may, for example, have an angle to a degree that the damage to the yarn Y becomes extremely small.

[0090] (4) In the above-described embodiment, at least a part of the contact portion 51a of the broadening guide 51 is disposed at a position overlapping with the yarn travel space 43 when viewed in the first direction. However, the present application is not limited thereto. The contact portion 51a can also be disposed at a position not necessarily overlapping with the yarn travel space 43 when viewed in the first direction. The same applies to the disposition of the contact portion 52a of the broadening guide 52. Further, in this case, a guide member (not shown) for properly guiding the yarn Y into the yarn travel space 43 is required to be disposed between the interlacing portion 32 and the broadening guide 51 (or the broadening guide 52) in the first direction.

[0091] (5) In the above-described embodiment, the broadening guide 50 broadens the yarn Y to a width of the yarn Y in the third direction substantially identical to the size (W2) of the injection hole 41b in the third direction (close to W2, i.e., the difference between the width of the yarn Y in the third direction and W2 is reduced), but the present application is not limited thereto. The width of the yarn Y in the third direction after being broadened by the broadening guide 50 can also be made smaller than W2.

[0092] (6) In the above-described embodiment, the broadening guide 50 is disposed on both sides of the interlacing portion 32 in the first direction (both sides in the yarn travel direction), but the present application is not limited thereto. For example, the broadening guide 50 can also be disposed only on the upstream side of the interlacing portion 32 in the yarn travel direction (i.e., as the broadening portion of the present application, only the broadening guide 51 can be provided). In such a configuration, it is also possible to broaden the yarn Y traveling in the yarn travel space 43 to a certain extent. Alternatively, the broadening guide 50 (i.e., the broadening guide 52) can also be disposed only on the downstream side of the interlacing portion 32 in the yarn travel direction.

[0093] (7) In the above-described embodiment, the interlacing unit 13 is provided with a plurality of interlacing devices 30, and one of the plurality of interlacing devices 30 has been described. However, the present application is not limited thereto. For example, the interlacing unit 13 can also have one interlacing device 60 that applies interlacing to all of the plurality of yarns Y (refer to FIG. 17). Figures 10-12 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII of Figure 10 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII of Figure 11 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII of Figure 12 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII of Figure 11 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII of Figure 10 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII of Figure 10 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII of Figure 10 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII of Figure 10 ) is a cross-sectional view of the interlacing device 60 taken along the line XII-XII ofFigure 12 Only a portion of the arrangement direction (described later) of the interlocking device 60 is shown. In the interlocking device 60, as described later, the definitions of the nozzle extension direction (second direction) and the third direction are different from those in the interlocking device 30.

[0094] The configuration of the communication device 60 will be described in detail. For example... Figure 10 as well as Figure 11 As shown, the interlocking device 60 has a base component 61, a plurality of interlocking plates 62 (interlocking portions of the present invention), and two wire guides 63 (see reference). Figure 11 The present invention includes a limiting part), and two widening guide wires 64 (see reference). Figure 11 (Extended portion of the present invention). A flow path 61a and a plurality of supply ports 61b are formed on a base member 61. The flow path 61a extends along the arrangement direction and is connected to a compressed air source (not shown). A plurality of supply ports 61b are formed on one end of the base member 61 in the height direction. The plurality of supply ports 61b are arranged in the arrangement direction. The plurality of supply ports 61b are connected to the flow path 61a. The plurality of supply ports 61b are respectively connected to the supply path 73 described later. A plurality of interlocking plates 62 extend along the first direction and the height direction, respectively. The plurality of interlocking plates 62 are fixed to the surface of the base member 61 on one side in the height direction. The plurality of interlocking plates 62 are arranged in the arrangement direction. Figure 10 As shown, each of the plurality of interlocking sheets 62 has a thread travel space 71, a slit 72, a supply path 73, and an injection hole 74 formed thereon. The thread travel space 71 extends through the interlocking sheet 62 along a first direction. The slit 72 is formed at one end of the interlocking sheet 62 on one side of the arrangement direction and extends along the first direction. The slit 72 is connected to the thread travel space 71. The center position of the slit 72 in the height direction is approximately the same as the center position of the thread travel space 71 in the height direction. The supply path 73 is disposed on the other side of the arrangement direction of the thread travel space 71 (i.e., the side opposite to the slit 72 in the arrangement direction, separated by the thread travel space 71). The supply path 73 extends in the height direction from the end of the interlocking sheet 62 on the other side to one side (i.e., from the end of the interlocking sheet 62 near the base member 61 to the end away from the base member 61 in the height direction). The supply path 73 is connected to the supply port 61b of the base member 61. The injection hole 74 is formed at the end of the interlacing sheet 62 on the opposite side of the arrangement direction (i.e., the side opposite to the wire travel space 71 in the arrangement direction, separated by the supply path 73). The injection hole 74 is connected to the supply path 73. The injection hole 74 is formed in the height direction at approximately the same position as the slit 72. In other words, the center position of the injection hole 74 in the height direction is approximately the same as the center position of the wire travel space 71 in the height direction. The injection hole 74 is formed at the center of the interlacing sheet 62 in the first direction (see reference). Figure 11). The injection holes 74 extend substantially in parallel with the arrangement direction. That is, the nozzle extension direction (2nd direction) in which the injection holes 74 extend is different from the direction in which the above-mentioned injection holes 41b (refer to Figure 2 , etc.) extend. Further, in this modification, the direction which is substantially parallel with the height direction when viewed from the 1st direction is the 3rd direction (refer to Figure 10 ). That is, the 3rd direction is substantially orthogonal (crosses) the arrangement direction. The injection holes 74 formed in a certain interlacing sheet 62 (for example, the interlacing sheet 62A) abut the slits 72 of other interlacing sheets 62 (for example, the interlacing sheet 62B) which are arranged on the other side of the interlacing sheet 62A in the arrangement direction (that is, on the side opposite to the supply path 73 from the interlacing sheet 62A with the slits 72 interposed therebetween). That is, the compressed air injected from the injection holes 74 formed in the interlacing sheet 62A is injected into the yarn travel space 71 formed in the interlacing sheet 62B. In this way, the interlacing sheet 62 (interlacing sheet 62B) which forms a certain yarn travel space 71 and the interlacing sheet 62 (interlacing sheet 62A) which forms the injection holes 74 connected to the yarn travel space 71 can also be different from each other. The slit 75 which extends in the 1st direction is formed between the end surface on the other side of the interlacing sheet 62A in the arrangement direction and the end surface on the one side of the interlacing sheet 62B in the arrangement direction (that is, between the two end surfaces which face each other in the arrangement direction). The slit 75 is connected to the slit 72 and extends in the height direction. When the yarn Y is hooked to the interlacing device 60, the yarn Y is introduced into the yarn travel space 71 from the outside space through the slit 75 and the slit 72.

[0095] The two restriction guides 63 (restriction guides 81, 82. Refer to Figure 11 and Figure 12) configured to restrict the movement of the yarn Y in the third direction. The restriction guide 81 is disposed on one side of the first direction of the interlacing piece 62 (the upstream side of the yarn travel direction). The restriction guide 82 is disposed on the other side of the first direction of the interlacing piece 62 (the downstream side of the yarn travel direction). Each of the restriction guides 63 has, for example, the same shape as the above-described restriction guide 33. The restriction guide 63 can also have the same groove 63a as the groove 33a of the restriction guide 33. The restriction guide 63 can also have the same side surface 63b as the side surface 33b of the restriction guide 33. The restriction guide 63 (and the restriction guide 33) is configured to restrict the movement of the yarn Y to at least one side of the third direction. For example, in this modification example, the movement of the yarn Y to the other side in the height direction (i.e., the side closer to the base member 61 in the height direction) is restricted by the groove 63a. However, the restriction guide 63 (and the restriction guide 33) is preferably configured not to widen the yarn Y in a direction different from the third direction. For example, in this modification example, the movement of the yarn Y to both sides in the arrangement direction is restricted by the side surface 63b. Thereby, the yarn Y is suppressed from being widened in the second direction. In addition, the shape of the restriction guide 63 is not limited thereto. Instead of the restriction guide 63, for example, a cylindrical restriction guide (not shown) extending along the arrangement direction can be provided. That is, the restriction guide can have a similar shape to the above-described widening guide 50 (refer to Figure 2 and the like). With such a restriction guide, the movement of the yarn Y in the third direction can be restricted. In this case, a restriction groove (not shown) for suppressing the yarn Y from being widened in the second direction can also be formed on the outer periphery of the restriction guide.

[0096] The two widening guides 64 (widening guides 91, 92. Refer to Figure 11 and Figure 12 ) are configured to widen the yarn Y in the third direction (in this modification example, the height direction). The widening guide 91 is disposed between the restriction guide 81 and the interlacing piece 62 in the first direction. The widening guide 92 is disposed between the interlacing piece 62 and the restriction guide 82 in the first direction. The widening guide 64 can also be, for example, a round bar-shaped member extending along the height direction. That is, the widening guide 64 can have the same shape as the above-described widening guide 50. Thereby, a contact portion (contact portions 91a, 92a) of the widening guide 64 that contacts the yarn Y can apply a resistance to the yarn Y. Thereby, the yarn Y can be widened in the height direction (the third direction) (refer to Figure 11 and Figure 12 ).

[0097] The more detailed positional relationship of the restriction guide 63, the widening guide 64, and the yarn travel space 71 is as described below. That is, as Figure 12As shown, in the second direction, the center position between the side surface 63b of the restricting guide 81 and the contact portion 91a of the widening guide 91 is substantially the same as the center position of the yarn travel space 71 in the second direction. Also, in the second direction, the center position between the side surface 63b of the restricting guide 82 and the contact portion 92a of the widening guide 92 is also substantially the same as the center position of the yarn travel space 71 in the second direction. Thus, the yarn Y widened (flattened) by the widening guide 64 passes through substantially the center of the yarn travel space 71 in the second direction.

[0098] Further, the widening guide 64 (and the above-described widening guide 50) can have an arbitrary shape as long as it is configured to widen the yarn Y in the third direction. For example, a flat plate-shaped U-shaped guide (not shown) similar to the shape of the restricting guide 63 can be provided as the widening guide 64. Also, in such a case, the position and / or size of the groove need to be appropriately set so that the movement of the yarn Y in the third direction is not restricted by the groove (not shown) formed in the U-shaped guide. Further, the widening guide 64 can also be provided only on the upstream side or the downstream side of the yarn travel direction of the interlacing piece 62, as in the above-described modification example of (6).

[0099] (8) The interlacing device 30, 60 can also be applied to a fiber machine other than the spinning draft machine 1 that processes a traveling yarn Y.

Claims

1. A twisting device for imparting twist to an advancing thread having a plurality of filaments, characterized by, Possessing: a twisting portion having a yarn travel space for causing the yarn to travel in a prescribed first direction and a jet hole for jetting fluid to the yarn travel space in a second direction intersecting the first direction, the yarn being twisted by the fluid jetted to the yarn travel space from the jet hole; a restricting portion disposed at a position separated from the twisting portion in the first direction, the movement of the yarn being restricted in a third direction intersecting the second direction when viewed from the first direction; and a widening portion disposed between the twisting portion and the restricting portion in the first direction, the yarn traveling in the yarn travel space being widened in the third direction by the widening portion; the widening portion widens the yarn so that the difference between the width of the yarn in the third direction and the size of the jet hole in the third direction is reduced.

2. The twisting device according to claim 1, wherein the widening portion is such that the width of at least the portion of the yarn traveling in the yarn travel space in the third direction is greater than the width of the portion of the yarn restricted by the restricting portion in the third direction.

3. The twisting device according to claim 1 or 2, wherein the widening portion has a rod-shaped widening guide extending in the third direction.

4. The twisting device according to any one of claims 1 to 3, wherein at least a portion of the contact portion contacting the yarn is disposed at a position overlapping the yarn travel space when viewed from the first direction.

5. The twisting device according to any one of claims 1 to 4, wherein the contact portion contacting the yarn is curved.

6. The twisting device according to any one of claims 1 to 5, wherein the widening portion does not rotate.

7. A thread winder characterized by Possessing: the twisting device according to any one of claims 1 to 6; and a winding portion winding the yarn to which the twisting has been applied by the twisting device to form a package.

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