JP2013249173A - Yarn piecing device, yarn winding device, and textile machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn piecing device capable of stabilizing the strength and appearance of a seam of elastic yarns, a yarn winding device, and a textile machine.SOLUTION: A yarn piecing device equipped with a cooling mechanism for cooling yarn ends YA and YB of elastic yarns, a yarn winding device, and a textile machine. When the yarn ends YA and YB of the elastic yarns are pieced in a cooled state, elasticity of the yarn ends YA and YB of the elastic yarns is reduced and shrinking of the seam part can be prevented. The elastic yarns can be pieced with non-elastic yarns in the same way, thereby stabilizing the strength and appearance of the seam of the elastic yarns.

Description

  The present invention relates to a yarn joining device that joins yarn ends of separated yarns, a yarn winding device including the yarn joining device, and a textile machine.

  Conventionally, a yarn winding device such as an automatic winder that winds a yarn unwound from a yarn feeding bobbin as a package is known. A plurality of yarn winding devices are arranged side by side to constitute a textile machine. The yarn winding device includes a yarn joining device that joins the yarn end on the package side and the yarn end on the yarn feeding side at the time of yarn cutting by the yarn breakage or yarn defect detection device.

  As a yarn joining device, a yarn joining device that performs untwisting of both yarn ends to be spliced and twisting of both untwisted yarn ends using a fluid such as compressed air is known (for example, Patent Document 1). reference.). The yarn splicing device described in Patent Document 1 includes an untwisting nozzle for untwisting both yarn ends and a twisting nozzle for twisting both yarn ends after untwisting. By this yarn joining device, steps such as introduction of yarn ends, untwisting, and twisting are executed to perform yarn joining.

  Specifically, both ends of the yarn are sucked into the untwisting nozzle and untwisted by the action of a fluid supplied into the untwisting nozzle to loosen the fiber bundle. When both yarn ends are untwisted, the untwisted portions of both yarn ends move into the twisting nozzle. The untwisted portions of both yarn ends in the twisting nozzle are swung, entangled and twisted by the action of the fluid supplied to the twisting nozzle.

  By the way, a thread (elastic thread) in which a highly stretchable polyurethane thread is used as a core thread and its periphery is covered with a fiber bundle made of short fibers such as hair, rayon, ester, or cotton is a thread that is not an elastic thread. Unlikely, the yarn end may shrink during yarn joining. If the yarn end shrinks at the time of yarn joining, the behavior of the yarn end may become unstable, such as the length of the portion that becomes the joint becomes insufficient, resulting in yarn joining failure such as insufficient strength of the seam and poor appearance. . Such a yarn splicing failure is remarkable, for example, in the case of an elastic yarn having a high stretch fiber ratio (core ratio) or an elastic yarn spun at a high draft rate.

  For this reason, the yarn joining device is provided with a mechanism for temporarily fixing the yarn end and suppressing the elastic yarn from shrinking. However, this mechanism can only hold the vicinity of the seam, not the seam. Therefore, in this mechanism, the shrinkage of the seam portion cannot be suppressed, the yarn end behavior becomes unstable, and a stable seam appearance and strength cannot be realized.

  Patent Document 2 describes a technique for reducing the stretchability of an elastic yarn by cooling. However, this technique is a technique for cooling the yarn layer in order to extract the core tube wound with the elastic yarn. A technique for stabilizing the strength and appearance of the elastic yarn at the time of splicing is not disclosed.

  Conventionally, a technique for cooling a yarn in order to lower the temperature of the yarn after heating the yarn in a yarn processing step is known. However, this cooling is a cooling for lowering the temperature of the yarn that has been raised by heating, and is not a technique for cooling the yarn in order to stabilize the strength and appearance of the elastic yarn when splicing.

  Further, conventionally, there is known a technique for performing piecing by adding moisture when piecing a yarn containing cotton fibers. However, the reason why moisture is added to the yarn at the time of piecing is that the cotton fibers are easily twisted by moisture, not to lower the yarn temperature. Therefore, the technique of adding moisture to the yarn at the time of piecing is excluded from the technical scope of the present invention.

JP 59-211162 A Japanese Patent No. 2987463

  The present invention has been made to solve the above problems. An object of the present invention is to provide a yarn joining device, a yarn winding device, and a textile machine that can stabilize the strength and appearance of a seam of an elastic yarn.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, the yarn splicing device of the first invention is
A yarn joining device that joins the yarn ends of the separated yarn, and includes a cooling mechanism that cools the yarn ends.

The yarn joining device of the second invention is the yarn joining device of the first invention,
The cooling mechanism cools each yarn end in an environment of 0 ° C to -40 ° C.

The yarn joining device of the third invention is the yarn joining device of the second invention,
A preparation part and a twisting part are provided.
A preparation part performs the pre-processing for performing twisting with respect to each yarn end.
The twisting portion twists each yarn end.
And a cooling mechanism cools each yarn end arrange | positioned at a preparation part and / or a twist part.

A yarn joining device of a fourth invention is the yarn joining device of the third invention,
The preparation unit is an untwisting unit that untwists the fiber bundle at each yarn end with air, and the air cooled by the cooling mechanism is supplied to the untwisting unit.

The yarn splicing device of the fifth invention is the yarn splicing device of the fourth invention,
The cooling mechanism includes an air flow path and a cooling unit.
The air flow path supplies air to the untwisting portion.
The cooling unit cools the air flowing through the air flow path.

A yarn joining device of a sixth invention is the yarn joining device of any one of the first to fifth inventions,
The cooling mechanism cools each yarn end using the cold supplied from the heat pump.

A yarn joining device of a seventh invention is the yarn joining device of any one of the first to fourth inventions,
The cooling mechanism cools each yarn end using the cold supplied from the low-temperature air generator.

The yarn splicing device of the eighth invention is the yarn splicing device of any one of the first to seventh inventions,
The yarn is an elastic yarn in which a highly elastic core yarn is covered with a fiber bundle.

The yarn joining device of the ninth invention is the yarn joining device of the eighth invention,
The core yarn is polyurethane, and the fiber bundle is spun yarn.

The yarn winding device of the tenth invention is
A yarn splicing device according to any one of the first to sixth, eighth, or ninth inventions and a cooling device are provided.
The cooling device supplies cold heat to the cooling mechanism.

The textile machine of the eleventh invention is
A yarn winding device including the yarn splicing device of any one of the first to sixth, eighth, or ninth inventions, an air supply device, and a cooling device are provided.
The air supply device supplies air to the yarn joining device.
The cooling device supplies cold heat to a cooling mechanism for cooling air from the air supply device, and is provided separately from the yarn winding device.

The textile machine of the twelfth invention is the textile machine of the eleventh invention,
The cooling device cools the air from the air supply device before distributing it to the cooling mechanisms provided in the plurality of yarn winding devices.

The textile machine of the thirteenth invention is
A textile machine comprising a plurality of yarn winding devices for winding a yarn unwound from a yarn supplying bobbin around which an elastic yarn is wound as a package,
The yarn winding device includes a cooling processing unit that cools the yarn unwound from the yarn supplying bobbin before winding the yarn as a package.

  As effects of the present invention, the following effects can be obtained.

  According to the yarn splicing device of the first invention, the cooling mechanism for cooling the yarn end of the divided yarn is provided, and the yarn joining is performed in a state where the yarn end is cooled, so that the elasticity of the yarn end of the elastic yarn is reduced. It is possible to prevent the seam from shrinking. For this reason, even an elastic yarn can be spliced in the same manner as a yarn that is not an elastic yarn, and the strength and appearance of the seam of the elastic yarn can be stabilized.

  According to the yarn splicing device of the second invention, since the cooling mechanism cools each yarn end in an environment of 0 ° C. to −40 ° C., it reduces the stretchability of each yarn end of the elastic yarn and becomes a seam. It can suppress that a part shrinks.

  According to the yarn splicing device of the third invention, the cooling mechanism cools each yarn end of the elastic yarn arranged in the preparation unit and / or the twisting unit. For this reason, it is possible to reduce the stretchability of each yarn end of the elastic yarn immediately before the twisting and / or simultaneously with the twisting, and to prevent the seam portion from shrinking.

  According to the yarn splicing device of the fourth invention, the untwisting unit untwists the fiber bundle at each yarn end with the air cooled by the cooling mechanism. For this reason, in the untwisting process immediately before performing twisting, it is possible to reduce the stretchability of each yarn end of the elastic yarn and to prevent the seam portion from shrinking. Moreover, since it cools just before performing twisting, before the cooling effect is lost, each thread end can be twisted at the twisting part.

  According to the yarn splicing device of the fifth invention, the cooling mechanism cools the air flowing through the air flow path by the cooling unit. Since the temperature of the air itself is lowered without containing an additive or the like in the air, each yarn end to be untwisted is not contaminated with the additive or the like, and the yarn quality is not impaired. Further, since the additives and the like are not released to the outside, the surrounding environment is not contaminated.

  According to the yarn splicing device of the sixth invention, the cooling mechanism cools each yarn end using the cold supplied from the heat pump. For this reason, if it is the environment where electric power is supplied, each yarn end can be cooled.

  According to the yarn splicing device of the seventh invention, the cooling mechanism cools each yarn end using the cold heat supplied from the low temperature air generator. For this reason, each yarn end can be cooled with a simple configuration.

  According to the yarn splicing device of the eighth invention, it is possible to reduce the stretchability of the yarn end of the elastic yarn in which the highly stretchable core yarn is covered with the fiber bundle, and to suppress the shrinkage of the joint portion.

  According to the yarn splicing device of the ninth invention, it is possible to reduce the stretchability of the yarn end of the elastic yarn in which the polyurethane core yarn is covered with the spun yarn, and to suppress the shrinkage of the joint portion.

  According to the yarn winding device of the tenth aspect of the invention, since the cooling device is provided in the yarn winding device, the cooling device can be set and operated individually for each yarn winding device.

  According to the textile machine of the eleventh aspect, the cooling device is provided in the textile machine and is provided separately from the yarn winding device. For this reason, it is not necessary to install a cooling device for every yarn winding device, and it is possible to prevent the yarn winding device from becoming large.

  According to the textile machine of the twelfth aspect, the plurality of yarn winding devices are provided, and the cooling device cools the air from the air supply device before distributing it to the cooling mechanism provided in the plurality of yarn winding devices. To do. For this reason, it is not necessary to install a cooling device for every yarn winding device, and the cost of the cooling device and the textile machine can be reduced.

  According to the textile machine of the thirteenth aspect, since the yarn is cooled before winding the elastic yarn as a package, the stretchability of each yarn end of the elastic yarn is reduced, and the portion that becomes a seam when piecing is performed Can be prevented from shrinking. In addition, the elastic yarn can be prevented from being wound around the package in an excessively stretched state or an excessively contracted state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified front view showing a yarn winding unit 11 to which a yarn joining device 21 according to Embodiment 1 of the present invention is applied. 1 is a perspective view of a yarn splicing device 21 according to Embodiment 1. FIG. FIG. 2 is a simplified diagram of the structure of a yarn joining device 21. FIG. 3 is a simplified diagram illustrating a connection state between an air supply device 61 and a cooling device 81 of the automatic winder 100 according to the first embodiment. The simplified diagram which fractured | ruptured one part which shows the structure of the cooling part 51. FIG. 6 is a graph showing experimental results by the yarn splicing device 21 of Example 1. FIG. 6 is a simplified diagram illustrating piping of an air supply device 61 and a cooling device 81 of an automatic winder 100 according to a second embodiment. 6 is a simplified diagram of the structure of a yarn joining device 21 according to Embodiment 3. FIG. FIG. 6 is a simplified diagram of the structure of a yarn splicing device 21 according to a fourth embodiment.

  Next, embodiments of the invention will be described with reference to the drawings.

  1 to FIG. 1 show a yarn winding unit 11 as a yarn winding device to which the yarn joining device 21 according to Embodiment 1 of the present invention is applied, and an automatic winder 100 (textile machine) composed of a plurality of yarn winding units 11. 6 will be described. In the following description, the case where the yarn joining device 21 is applied to the yarn winding unit 11 will be described. However, the yarn joining device 21 according to the present invention forms a package P by winding the fiber bundle into a spun yarn. It can also be applied to a spinning machine.

  As shown in FIG. 1, the yarn winding unit 11 of the present embodiment is arranged on the winding tube 92 while traversing (traversing) the yarn Y (elastic yarn) unwound from the yarn supplying bobbin 91 by the traverse device 12. A thread layer is formed to form a package P. The traveling direction of the yarn Y is a direction from the yarn supplying bobbin 91 toward the package P. Although there is one yarn winding unit 11 shown in FIG. 1, an automatic winder 100 is configured by arranging a plurality of such yarn winding units 11 as shown in FIG.

  In this specification, the winding tube 92 and the package P may be collectively referred to as a winding bobbin B. That is, the winding bobbin B on which the yarn layer is not formed is the winding tube 92, and the winding bobbin B on which the yarn layer is formed is the package P.

  First, the outline of the yarn winding unit 11 will be described. As shown in FIG. 1, the yarn winding unit 11 includes a winding unit 2, a contact roller 14, a traverse device 12, and a yarn feeding unit 3.

  The winding unit 2 is a part that winds the yarn Y around the package P. The winding unit 2 includes a cradle 13, a bearing (not shown), and a winding bobbin drive motor 18. The cradle 13 is swingable about a swing shaft 15. The bearing is provided in the cradle 13. The take-up bobbin B is detachably attached to the bearing, and the cradle 13 grips both ends of the take-up bobbin B so as to be rotatable. When the diameter of the winding bobbin B is increased by winding the yarn Y around the winding bobbin B, the cradle 13 swings. Accordingly, an appropriate contact between the circumferential surface of the winding bobbin B and the contact roller 14 is maintained.

  The take-up bobbin drive motor 18 is a drive unit that directly drives the take-up bobbin B to rotate. The drive shaft of the take-up bobbin drive motor 18 is connected to the take-up bobbin B so as not to rotate relative to the take-up bobbin B when the take-up bobbin B is held by the bearing of the cradle 13 (so-called direct drive system). The winding unit 2 winds the yarn Y by positively rotating the winding bobbin B by the winding bobbin driving motor 18.

  The contact roller 14 is a cylindrical roller that rotates in contact with the circumferential surface of the winding bobbin B. The contact roller 14 presses the yarn Y against the surface of the winding bobbin B with an appropriate pressure, and adjusts the shape of the winding bobbin B (package P).

  The traverse device 12 is driven independently of the winding bobbin B, and traverses the yarn Y wound around the winding bobbin B. The traverse device 12 includes a traverse guide 17 and a traverse guide drive motor 19.

  The traverse guide 17 is a member that engages with the yarn Y and traverses the yarn Y. The traverse guide drive motor 19 moves the traverse guide 17 in the direction of the winding width of the winding bobbin B as shown by the arrow in FIG. 1, that is, the first end (the left end in the drawing) of the winding bobbin B and the second. Is driven so as to reciprocate both ends of the end portion (right end portion in the figure). The package P may be driven to rotate by driving a traverse grooved drum provided with a drive source. At that time, the yarn Y is traversed by the traverse groove formed in the traverse groove drum.

  The yarn supplying portion 3 is a portion that supplies the yarn Y wound on the winding bobbin B. The yarn feeding section 3 is provided with a yarn feeding bobbin holding peg (not shown), and a yarn feeding bobbin 91 is attached to the yarn feeding bobbin holding peg. In the yarn traveling path between the yarn supplying unit 3 and the contact roller 14, a yarn unwinding assisting device 23, a tension applying device 20, a yarn joining device 21, and a yarn clearer 22 are provided in this order from the yarn supplying unit 3 side. It has been.

  The yarn unwinding assisting device 23 comes into contact with the yarn Y unwound from the yarn supplying bobbin 91 and controls the yarn Y unwinding balloon.

  The tension applying device 20 applies an appropriate tension to the yarn Y. The yarn clearer 22 detects a yarn defect such as a slab by detecting the thickness of the yarn Y passing through the detection portion with a sensor. The yarn clearer 22 may be configured to detect the presence or absence of foreign matter contained in the yarn Y in addition to the abnormal thickness of the yarn Y. The yarn clearer 22 is used to cut the yarn Y because it has detected a yarn defect (clearer cut), or to cut the yarn Y (additional cut) to interrupt winding due to a traverse failure, although this is not a yarn defect. A cutter is attached.

  The yarn joining device 21 includes a yarn end YA of the lower yarn on the yarn supplying bobbin 91 side and a winding bobbin B (package P) side when the yarn clearer 22 cuts the yarn or the yarn Y from the yarn supplying bobbin 91 is broken. Yarn splicing with the yarn end YB of the upper yarn is performed. The yarn joining device 21 of this embodiment is characterized in that the yarn joining is performed in a state where the yarn ends YA and YB are cooled. The yarn joining device 21 will be described in detail later.

  A suction pipe 24 that captures the yarn end YA on the yarn feeding bobbin 91 side by suction and guides it to the yarn joining device 21 is provided below the yarn joining device 21 (upstream in the traveling direction of the yarn Y). On the upper side of the yarn joining device 21 (downstream in the traveling direction of the yarn Y), a suction mouth 27 that captures the yarn end YB on the winding bobbin B side by suction and guides it to the yarn joining device 21 is provided. The suction pipe 24 is configured in a pipe shape, and is provided so as to be rotatable up and down around a shaft 25, and an opening 26 is provided on the tip side thereof. The suction mouth 27 is also configured in a pipe shape, and is provided so as to be rotatable up and down around a shaft 28, and an opening 29 is provided on the tip side thereof. A negative pressure source (not shown) is connected to the suction pipe 24 and the suction mouth 27, and a suction action is generated in the opening 26 and the opening 29 at the tip.

  Although not shown, the yarn winding unit 11 is provided with a yarn supplying bobbin supplying section for supplying a new yarn supplying bobbin 91 when the yarn supplying bobbin 91 is consumed. As a yarn feeding bobbin supply unit, an automatic yarn feeding bobbin transport device and a manual bobbin storage magazine are known. The yarn feeding bobbin conveying device is a device that is connected to the automatic winder 100 and automatically supplies new yarn feeding bobbins 91 to each yarn winding unit 11 continuously. The bobbin storage magazine is a device that is provided in each yarn winding unit 11 and manually supplies a new yarn supplying bobbin 91. When the yarn feeding bobbin 91 is consumed, the bobbin housing magazine rotates by one pitch, and the yarn feeding bobbin 91 in the bobbin housing magazine is dropped and inserted into the yarn feeding bobbin holding peg.

  Next, the yarn joining device 21 will be described. In the yarn joining device 21, the yarn end YA on the yarn supplying bobbin 91 side and the yarn end YB on the winding bobbin B side are guided by the suction mouth 27 and the suction pipe 24 of the yarn winding unit 11, and the yarn ends YA and YB are introduced. Each process such as untwisting and twisting is performed using compressed air. As shown in FIG. 2, the yarn joining device 21 includes a yarn joining unit 31, a cover 32, and a cooling unit 51.

  As shown in FIGS. 2 and 3, the yarn joining portion 31 includes a first untwisting nozzle 71 and a second untwisting nozzle 72 as untwisting portions, a twisting nozzle 73 as a twisting portion, and a cooling nozzle 74. And a cleaning nozzle 75 (see FIG. 3). Further, the yarn joining portion 31 introduces the yarn ends YA and YB and adjusts the positions of the yarn ends YA and YB. The yarn joining lever 76, the yarn end cutter 77, the clamp portion 78, and the yarn presser lever 79 are arranged. I have.

  The first untwisting nozzle 71 and the second untwisting nozzle 72 serving as untwisting portions are portions that perform pretreatment for twisting the yarn ends YA and YB on the yarn ends YA and YB. Specifically, the first untwisting nozzle 71 performs untwisting by sucking the yarn end YA on the yarn feeding bobbin 91 side. The first untwisting nozzle 71 is connected to the untwisting air passage 41. Spiral airflow is generated in the first untwisting nozzle 71 by jetting compressed air for untwisting into the first untwisting nozzle 71. By this spiral air flow, the yarn end YA on the yarn supplying bobbin 91 side is sucked into the first untwisting nozzle 71, and the fiber at the yarn end YA is unwound.

  The second untwisting nozzle 72 sucks the yarn end YB on the winding bobbin B side and performs untwisting. The second untwisting nozzle 72 is also connected to the untwisting air passage 41. A spiral airflow is generated in the second untwisting nozzle 72 by jetting compressed air for untwisting into the second untwisting nozzle 72. With this spiral airflow, the yarn end YB on the winding bobbin B side is sucked into the second untwisting nozzle 72, and the fiber at the yarn end YB is unwound.

  The twisting nozzle 73 as a twisting part is a part that twists the yarn ends YA and YB. Specifically, the yarn ends YA and YB unwound by the first untwisting nozzle 71 and the second untwisting nozzle 72 are entangled and connected. The twisting nozzle 73 is connected to the yarn joining air flow path 42. The unraveled yarn ends YA and YB are twisted and connected by compressed air for yarn joining injected into the twisting nozzle 73.

  The cooling nozzle 74 is for splicing the yarn in a state in which the yarn ends YA and YB are cooled by jetting low-temperature compressed air. Specifically, low-temperature compressed air is jetted to the nozzles, levers, and the like that come into contact with the yarn ends YA and YB when piecing, and the atmosphere around the yarn ends YA and YB. The yarn ends YA and YB are cooled by lowering the temperature. The cooling nozzle 74 is connected to the cooling air flow path 43. A cooling unit 51 that cools the compressed air flowing through the cooling air flow path 43 is disposed in an intermediate portion of the cooling air flow path 43. In the present embodiment, the cooling unit 51 constitutes a cooling mechanism together with the cooling air flow path 43 and the cooling nozzle 74.

  By spitting compressed air that has been cooled to a low temperature by the cooling unit 51 from the cooling nozzle 74, yarn splicing is performed while the yarn ends YA and YB of the elastic yarn are cooled. As a result, the stretchability of the yarn ends YA and YB of the elastic yarn can be reduced, and the joint portion can be prevented from shrinking. In order to cool the yarn ends YA and YB, the ambient temperature around the yarn ends YA and YB is preferably 0 ° C. to −40 ° C. The configuration of the cooling unit 51 will be described in detail later.

  The cleaning nozzle 75 removes lint and the like accumulated in the yarn joining portion 31. The cleaning nozzle 75 is connected to the cleaning air flow path 44. By discharging compressed cleaning air from the cleaning nozzle 75 before or after piecing, the yarn waste accumulated in the piecing portion 31 is removed.

  The yarn gathering lever 76 includes a first yarn gathering lever 76a and a second yarn gathering lever 76b. The first yarn gathering lever 76a and the second yarn gathering lever 76b adjust the positions of the yarn ends YA and YB.

  The yarn end cutter 77 includes a first yarn end cutter 77a and a second yarn end cutter 77b. The first yarn end cutter 77a and the second yarn end cutter 77b cut the yarn ends YA and YB to an appropriate length before untwisting the yarn ends YA and YB, respectively.

  The clamp part 78 includes a first clamp plate 78a and a second clamp plate 78b. The first clamp plate 78a and the second clamp plate 78b clamp and fix the yarn ends YA and YB.

  The thread holding lever 79 includes a first fork 79a and a second fork 79b. The first fork 79a and the second fork 79b are adjusted by adjusting the positions of the untwisted portions of the yarn ends YA and YB so that the untwisted portions of the yarn ends YA and YB overlap in the twisting nozzle 73. Fix it.

  After the positions of the untwisted portions of the yarn ends YA and YB are fixed in the twisting nozzle 73 by the first fork 79a and the second fork 79b, compressed air for yarn joining is injected by the twisting nozzle 73. The untwisted portions of the yarn ends YA and YB are twisted and connected.

  The cover 32 is for improving the cooling efficiency of the yarn joining portion 31. As shown in FIG. 2, the cover 32 is installed so as to cover the yarn joining portion 31. The low-temperature compressed air jetted from the cooling nozzle 74 to the yarn joining portion 31 stays in the vicinity of the yarn joining portion 31 by the cover 32 so that the yarn joining portion 31 is effectively cooled.

  The untwisting air flow path 41, the yarn splicing air flow path 42, the cooling air flow path 43, and the cleaning air flow path 44 are connected to the air inlet 45. The untwisting air passage 41, the yarn splicing air passage 42, the cooling air passage 43, and the cleaning air passage 44 are provided with electromagnetic valves, and air injection is switched by opening and closing the electromagnetic valves. Yes. An air supply device 61 is connected to the air inlet 45 via an air supply channel 62. The air supply device 61 supplies compressed air to the yarn joining device 21. As shown in FIG. 4, the air supply device 61 is provided separately from the yarn winding unit 11, and is installed in common for the plurality of yarn winding units 11 constituting the automatic winder 100. Yes. That is, the air supply device 61 supplies compressed air to each yarn joining device 21 of each yarn winding unit 11.

  The cooling unit 51 cools the compressed air in the air flow path. As shown in FIG. 2, in the present embodiment, the cooling unit 51 is individually installed in each yarn joining device 21. As shown in FIG. 3, in the present embodiment, the cooling unit 51 cools the compressed air flowing through the cooling air flow path 43 in a part of the cooling air flow path 43. The cooling unit 51 is also connected to the cooling device 81 via the cold heat supply path 82. The cooling air flow path 43 may be provided with a direction control valve such as a check valve between the cooling unit 51 and the air inlet 45 to increase the cooling efficiency. The cooling device 81 will be described later.

  A specific configuration of the cooling unit 51 will be described. As shown in FIG. 5, the cooling unit 51 mainly includes a case 52, a heat exchanger 53, and a heat insulating material 54.

  The heat exchanger 53 includes a first flow channel 55 through which compressed air from the air supply device 61 flows and a second flow channel 56 connected to the cooling device 81. The second flow path 56 is disposed so as to surround the first flow path 55. The heat exchanger 53 is accommodated in a case 52 filled with a heat insulating material 54.

  The cooling device 81 will be described. The cooling device 81 supplies cold heat for cooling the compressed air from the air supply device 61. The cooling device 81 supplies cold energy by supplying a cooling medium to the cooling unit 51.

  As shown in FIG. 4, the cooling device 81 is provided as a separate body with respect to the yarn winding unit 11, and is installed in common with a plurality of yarn winding units 11 constituting the automatic winder 100. . That is, the cooling device 81 supplies cold heat to each cooling unit 51 of each yarn winding unit 11.

  A known heat pump is used as the cooling device 81 of the present embodiment. The outline of the heat pump will be described. The heat pump includes a cooling medium conveyance path that circulates and conveys the cooling medium, a cooling medium compression section that compresses the cooling medium, and a cooling medium expansion section that expands the cooling medium. The cooling medium conveyance path on the downstream side of the cooling medium expansion unit is connected to the second flow path 56 of the cooling unit 51. When the cooling medium flows through the second flow path 56 of the cooling unit 51, cold heat is supplied from the heat pump as the cooling device 81 to the cooling unit 51.

  A yarn splicing test was performed using the yarn winding unit 11 configured as described above, and the results are shown in FIG. FIG. 6A shows the result of a splicing test on an elastic yarn having a stretchable fiber ratio (core ratio) of about 50%. FIG. 6B shows the result of a splicing test on an elastic yarn having a stretchable fiber ratio (core ratio) of about 40%. The success rate and failure rate are shown for the case where cooling is not performed and the case where cooling is performed, respectively. The stretchable fiber ratio in this case is the ratio of the weight per unit length in the unloaded state of the stretchable fiber material used to the weight per unit length of the elastic yarn. .

  The conditions for the splicing test will be described. When cooling is not performed, the surface temperature of the yarn Y is about 30 ° C. When cooling is performed, the surface temperature of the twisting nozzle 73 is about 0 ° C. or less by injecting low-temperature compressed air in the range of 0 ° C. to −40 ° C. from the cooling nozzle 74.

  The criteria for determining success or failure of yarn splicing will be described. The case where the piecing is successful is a case where the piecing of the yarn ends YA and YB is completed and the winding of the yarn Y can be resumed normally. Further, the case where the splicing has failed includes both the case where the splicing of the yarn ends YA and YB cannot be performed and the case where the splicing of the yarn ends YA and YB is incomplete. When the yarn ends YA and YB are incompletely spliced, for example, the joint between the yarn ends YA and YB is broken by the tension at the moment when the winding of the yarn Y is resumed.

  The result of the splicing test shown in FIG. 6A will be described. The left side of FIG. 6A shows the result of piecing by a conventional method without cooling. The success rate is about 90% and the failure rate is about 10%. On the other hand, the right side of FIG. 6A shows the result of piecing in a cooled state. The success rate is about 100% and the failure rate is about 0%.

  The result of the splicing test shown in FIG. 6B will be described. The left side of FIG. 6B shows the result of piecing by a conventional method without cooling. The success rate is about 80% and the failure rate is about 20%. On the other hand, the right side of FIG. 6B shows the result of piecing in a cooled state. The success rate is about 100% and the failure rate is about 0%.

  From the results of the above-described yarn splicing test, it can be said that the success rate of the splicing can be improved by performing the splicing with the yarn ends YA and YB of the elastic yarn being cooled, as compared with the case where the cooling is not performed.

  The yarn splicing device 21, the yarn winding unit 11, and the automatic winder 100 according to the present embodiment described above have the following effects.

  According to the yarn joining device 21 and the yarn winding unit 11, a cooling mechanism for cooling the yarn ends YA and YB of the divided yarn Y is provided, and the yarn joining is performed while the yarn ends YA and YB of the elastic yarn are cooled. Further, it is possible to reduce the stretchability of the yarn ends YA and YB of the elastic yarn and to suppress the shrinkage of the joint portion. For this reason, even an elastic yarn can be spliced in the same manner as a yarn that is not an elastic yarn, and the strength and appearance of the seam of the elastic yarn can be stabilized.

  According to the yarn joining device 21 and the yarn winding unit 11, since the cooling mechanism cools the yarn ends YA and YB in an environment of 0 ° C. to −40 ° C., the elasticity of the yarn ends YA and YB of the elastic yarn is reduced. It is possible to prevent the seam from shrinking.

  According to the yarn joining device 21 and the yarn winding unit 11, the cooling mechanism cools the yarn ends YA and YB using the cold supplied from the heat pump. For this reason, the yarn ends YA and YB can be cooled in an environment where power is supplied.

  According to the automatic winder 100, the cooling device 81 is provided in the automatic winder 100 and is provided separately from the yarn winding unit 11. For this reason, it is not necessary to install the cooling device 81 for every yarn winding unit 11, and it can prevent that the yarn winding unit 11 enlarges.

  Next, the yarn joining device 21, the yarn winding unit 11, and the automatic winder 100 according to the second embodiment of the present invention will be described with reference to FIG. In the present embodiment, the cooling device 81 is greatly different from the first embodiment in that each cooling device 81 is individually provided in each yarn winding unit 11. Description of the common configuration is omitted.

  The cooling device 81 of the present embodiment will be described. As shown in FIG. 7, the cooling device 81 is individually provided for the yarn winding unit 11. That is, the cooling device 81 is provided in each of the plurality of yarn winding units 11 constituting the automatic winder 100.

  As the cooling device 81 of the present embodiment, a low-temperature air generator known as a vortex tube is used. A vortex tube is a device that swirls air at high speed to obtain low-temperature air. For example, Japanese Utility Model Laid-Open No. 61-74068 discloses a cooling device using a vortex tube. The vortex tube as the cooling device 81 supplies cold heat to the cooling unit 51 by supplying low-temperature air as a cooling medium. Further, low-temperature air from the vortex tube may be directly supplied as compressed air for untwisting or compressed air for yarn joining.

  The yarn splicing device 21, the yarn winding unit 11, and the automatic winder 100 according to the present embodiment described above have the following effects.

  According to the yarn splicing device 21, the cooling mechanism cools the yarn ends YA and YB of the elastic yarn using cold heat supplied from a vortex tube as a low-temperature air generator. Since the vortex tube has a simple structure, the yarn ends YA and YB can be cooled with a simple configuration.

  According to the yarn winding unit 11, since the cooling device 81 is provided in the yarn winding unit 11, the cooling device 81 can be set and operated individually for each yarn winding unit 11.

  Next, the yarn joining device 21, the yarn winding unit 11, and the automatic winder 100 according to Embodiment 3 of the present invention will be described with reference to FIG. In the present embodiment, the compressed air, which has become a low temperature by the cooling unit 51, is jetted from the first untwisting nozzle 71 and the second untwisting nozzle 72 as the untwisting unit, thereby cooling the yarn ends YA and YB of the elastic yarn. The point of performing the splicing in this state is greatly different from the first embodiment. Further, the cooling nozzle 74 and the cooling air flow path 43 are not provided. The description of the configuration common to the first embodiment is omitted.

  As described in the first embodiment, the first untwisting nozzle 71 and the second untwisting nozzle 72 as the untwisting section perform pre-processing for twisting the yarn ends YA and YB on the yarn ends YA and YB. It is a part to be performed. As shown in FIG. 8, the first untwisting nozzle 71 and the second untwisting nozzle 72 are connected to the untwisting air flow path 41. A cooling unit 51 that cools the compressed air flowing through the untwisting air flow channel 41 is disposed at an intermediate portion of the untwisting air flow channel 41. In the present embodiment, the cooling unit 51 constitutes a cooling mechanism together with the untwisting air passage 41, the first untwisting nozzle 71, and the second untwisting nozzle 72.

  By injecting low-temperature compressed air into the first untwisting nozzle 71, a spiral air flow is generated in the first untwisting nozzle 71. With this spiral air flow, the yarn end YA on the yarn supplying bobbin 91 side is sucked into the first untwisting nozzle 71, the fibers at the yarn end YA are unwound, and the yarn end YA is cooled.

  Moreover, a spiral airflow is generated in the second untwisting nozzle 72 by injecting low-temperature compressed air into the second untwisting nozzle 72. With this spiral airflow, the yarn end YB on the winding bobbin B side is sucked into the second untwisting nozzle 72, the fibers at the yarn end YB are unwound, and the yarn end YB is cooled.

  The yarn splicing device 21, the yarn winding unit 11, and the automatic winder 100 according to the present embodiment described above have the following effects.

  According to the yarn joining device 21, the first untwisting nozzle 71 and the second untwisting nozzle 72 as the untwisting portion untwist the fiber bundles of the yarn ends YA and YB of the elastic yarn by the air cooled by the cooling mechanism. To do. For this reason, in the untwisting process immediately before performing twisting, it is possible to reduce the stretchability of the yarn ends YA and YB of the elastic yarn and to prevent the seam from shrinking. Further, since the cooling is performed immediately before the twisting, the yarn ends YA and YB can be twisted by the twisting nozzle 73 as the twisting part before the cooling effect is lost.

  According to the yarn joining device 21, the cooling mechanism cools the air flowing through the untwisting air flow channel 41 by the cooling unit 51. Since the temperature of the air itself is lowered without containing an additive or the like in the air, the yarn ends YA and YB to be untwisted are not contaminated with the additive and the yarn quality is not impaired. Further, since the additives and the like are not released to the outside, the surrounding environment is not contaminated.

  Next, the yarn splicing device 21, the yarn winding unit 11, and the automatic winder 100 according to Embodiment 4 of the present invention will be described with reference to FIG. In the present embodiment, the splicing is performed in a state where the yarn ends YA and YB of the elastic yarn are cooled by injecting the compressed air, which has become a low temperature by the cooling unit 51, from the twisting nozzle 73 as the twisting unit. This is significantly different from the first embodiment. Further, the cooling nozzle 74 and the cooling air flow path 43 are not provided. The description of the configuration common to the first embodiment is omitted.

  As described in the first embodiment, the twisting nozzle 73 as a twisting portion is a portion that twists the yarn ends YA and YB. Specifically, the yarn ends YA and YB unwound by the first untwisting nozzle 71 and the second untwisting nozzle 72 are intertwined and connected. As shown in FIG. 9, the twisting nozzle 73 is connected to the yarn joining air flow path 42. A cooling unit 51 that cools the compressed air flowing through the yarn joining air flow path 42 is disposed at an intermediate portion of the yarn joining air flow path 42. In the present embodiment, the cooling unit 51 constitutes a cooling mechanism together with the yarn joining air flow path 42 and the twisting nozzle 73.

  By jetting low-temperature compressed air into the twisting nozzle 73, the unwound yarn ends YA and YB are twisted and connected while being cooled.

  The yarn splicing device 21, the yarn winding unit 11, and the automatic winder 100 according to the present embodiment described above have the following effects.

  According to the yarn joining device 21, the cooling mechanism cools the yarn ends YA and YB of the elastic yarn disposed in the twisting nozzle 73 as the twisting portion. For this reason, at the same time as twisting, the stretchability of the yarn ends YA and YB of the elastic yarn can be reduced, and the seam portion can be prevented from shrinking.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible.

  For example, in each of the embodiments described above, the cooling unit 51 is individually installed in each yarn joining device 21. However, it is not limited to this. The cooling unit 51 may be provided separately from the yarn winding unit 11 and may be installed in common for the plurality of yarn winding units 11 constituting the automatic winder 100. The compressed air from the air supply device 61 is cooled by a common cooling unit 51 before being distributed to each yarn winding unit 11, and then supplied to each yarn joining device 21 of each yarn winding unit 11.

  In this case, it is not necessary to install the cooling device 81 for each yarn winding unit 11, and the cost of the cooling device 81 and the automatic winder 100 can be reduced.

  In each of the above embodiments, the yarn ends YA and YB of the elastic yarn are cooled in the yarn joining device 21, but the invention is not limited to this. For example, before the yarn winding unit 11 winds the yarn Y unwound from the yarn supplying bobbin 91 as the package P, a cooling processing unit that cools the yarn Y may be provided.

  For example, the yarn feeding bobbin holding peg installed in the yarn feeding unit 3 of the yarn winding unit 11, the yarn unwinding assisting device 23, or the tension applying device 20 may have a cooling function for cooling the yarn Y. Alternatively, the yarn supply bobbin supply unit for supplying a new yarn supply bobbin 91 to the yarn winding unit 11 has a cooling function for cooling the yarn Y together with the yarn supply bobbin 91 in the yarn supply bobbin conveying device and the bobbin storage magazine. It may be allowed.

  In this case, since the yarn Y is cooled before winding the elastic yarn as the package P, the stretchability of the yarn ends YA and YB of the elastic yarn is reduced, and the portion that becomes the seam when the yarn is joined is shrunk. Can be suppressed. Further, it is possible to prevent the elastic yarn from being wound around the package P in an excessively stretched state or an excessively contracted state.

  Further, although the yarn ends YA and YB of the elastic yarn are cooled by the compressed air cooled in the yarn joining device 21, the invention is not limited to this. For example, the structure itself of the yarn joining device 21 may be cooled by the cooling unit 51.

100 Automatic winder (textile machine)
DESCRIPTION OF SYMBOLS 2 Winding part 3 Yarn feeding part 11 Yarn winding unit 12 Traverse device 13 Cradle 14 Contact roller 15 Oscillating shaft 17 Traverse guide 18 Winding bobbin drive motor 19 Traverse guide drive motor 20 Tension applying device 21 Yarn splicing device 22 Yarn clearer 23 Thread unwinding assist device 24 Suction pipe 25 Shaft 26 Opening portion 27 Suction mouse 28 Shaft 29 Opening portion 31 Yarn splicing portion 32 Cover 41 Untwisting air flow path 42 Yarn splicing air flow path 43 Cooling air flow path 44 For cleaning Air channel 45 Air inlet 51 Cooling unit 52 Case 53 Heat exchanger 54 Heat insulating material 55 First channel 56 Second channel 61 Air supply device 62 Air supply channel 71 First untwisting nozzle 72 Second untwisting nozzle 73 Twisting Hanging nozzle 74 Cooling nozzle 75 Cleaning nozzle 76 Yarn feed lever 77 Thread end cutter 78 Clamp part 79 Thread holding lever 81 Cooling device 82 Cold supply path 91 Yarn supply bobbin 92 Winding tube B Winding bobbin P Package Y Thread

Claims (13)

A yarn joining device that joins the ends of divided yarns,
A yarn joining device provided with a cooling mechanism for cooling the yarn end. The yarn splicing device according to claim 1,
The cooling mechanism is a yarn joining device that cools the yarn ends in an environment of 0 ° C to -40 ° C. The yarn splicing device according to claim 2,
A preparatory portion for performing pre-treatment for twisting the yarn ends, and a twisting portion for twisting the yarn ends,
The cooling mechanism is a yarn joining device that cools the yarn ends arranged in the preparation unit and / or the twisting unit. The yarn splicing device according to claim 3,
The preparation section is an untwisting section for untwisting the fiber bundle at each yarn end with air,
A yarn splicing device in which air cooled by the cooling mechanism is supplied to the untwisting section. The yarn splicing device according to claim 4,
The cooling mechanism is
An air flow path for supplying air to the untwisting portion;
And a cooling unit that cools air flowing through the air flow path. The yarn splicing device according to any one of claims 1 to 5,
The cooling mechanism is a yarn joining device that cools the yarn ends using cold heat supplied from a heat pump. The yarn splicing device according to any one of claims 1 to 4,
The cooling mechanism is
A yarn splicing device that cools the yarn ends using cold heat supplied from a low-temperature air generator. The yarn joining device according to any one of claims 1 to 7,
The yarn splicing device, wherein the yarn is an elastic yarn in which a highly elastic core yarn is covered with a fiber bundle. The yarn splicing device according to claim 8,
The yarn splicing device, wherein the core yarn is polyurethane and the fiber bundle is spun yarn. A yarn joining device according to any one of claims 1 to 6, 8, or 9,
A cooling device for supplying cold to the cooling mechanism;
Yarn winding device with A yarn winding device provided with the yarn splicing device according to any one of claims 1 to 6, 8, or 9;
An air supply device for supplying air to the yarn joining device;
While supplying cold heat to the cooling mechanism for cooling the air from the air supply device, a cooling device provided separately from the yarn winding device,
Textile machine comprising. A textile machine according to claim 11,
The cooling device is a textile machine that cools air from the air supply device before distributing the air to the cooling mechanism provided in the plurality of yarn winding devices. A textile machine comprising a plurality of yarn winding devices for winding a yarn unwound from a yarn supplying bobbin around which an elastic yarn is wound as a package,
A textile machine comprising a cooling processing section for cooling the yarn before the yarn winding device winds the yarn unwound from the yarn feeding bobbin as a package.

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