JP2016016959A - Yarn winder and yarn winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winder that can prevent an end of yarn from being wound up by a package when failing in yarn splicing.SOLUTION: The yarn winder comprises a yarn feeding portion, a winding portion, a yarn splicing device, a detecting portion, and a determining portion. The yarn feeding portion supplies yarn. The winding portion has a rotation driving portion that rotates a package and winds the yarn fed by the yarn feeding portion onto the package. The yarn splicing device splices the yarn fed from the yarn feeding portion and yarn fed from the winding portion so as to form a yarn joint. The detecting portion detects the yarn joint formed by the yarn splicing device. The determining portion determines, on the basis of a detection result obtained by the detecting portion, whether or not the yarn joint is normal. The winding portion winds the yawn onto the package by increasing acceleration of rotation speed of the package after the yarn joint is determined to be normal by the determining portion.SELECTED DRAWING: Figure 6

Description

  The present invention mainly relates to a yarn winding machine for inspecting a seam formed by a yarn joining device.

  Conventionally, a yarn winding machine including a yarn feeding unit, a winding unit, and a yarn joining device is known. The winding unit winds the yarn by rotating the package. The yarn joining device joins the yarn from the yarn feeding unit and the yarn from the winding unit when the yarn is split between the yarn feeding unit and the winding unit. Patent Documents 1 to 3 disclose techniques related to a yarn winding machine including a yarn joining device.

  The yarn winding machine disclosed in Patent Document 1 includes a plurality of spinning units. Since the winding unit of each spinning unit is driven by a common drive source, the rotational speed of the winding drum for rotating the package is the same for all spinning units. Each spinning unit includes a seam monitor that measures the thickness of the seam formed by the yarn joining device. When each spinning unit determines that the joint measured by the joint monitor is not normal, the spinning unit cuts the yarn and repeats the joint.

  In the yarn winding machine disclosed in Patent Document 2, a yarn monitoring device is disposed on the upstream side of the yarn joining device. The yarn monitoring device is an optical sensor or the like, and measures the quality of the yarn by detecting the thickness of the yarn passing through the yarn passage. The yarn monitoring device includes a blow-out portion that blows out compressed air to the yarn passage. As a result, the yarn waste adhering to the yarn passage can be blown away, so that the measurement accuracy of the yarn monitoring device can be maintained.

  Patent Document 3 discloses a method for checking a yarn splicing device (splicer). The yarn winding machine has a mode in which the yarn joining device is inspected. When this mode is effective, the yarn is wound at a low speed after the yarn joining, and a predetermined tension is applied to the yarn from the yarn feeding unit. To detect the presence or absence of thread breakage. If the yarn breakage has occurred, the yarn winding machine notifies the operator that the yarn splicing is incomplete. When the yarn breakage has not occurred, the yarn winding machine cuts the yarn and performs piecing again.

JP 2013-67892 A JP 2013-230908 A Japanese Patent Laid-Open No. 2-215562

  In the conventional yarn winding machine, when the yarn joining device fails in the yarn joining, the yarn from the package is once taken up by the package. Thereafter, the yarn winding machine captures the yarn end by sucking the surface of the package or the like, and the yarn joining is performed again by the yarn joining device. However, when capturing the yarn end from the package, there is a possibility that the capture of the yarn end may fail or a part of the yarn on the surface layer of the package may be captured.

  In the yarn winding machine of Patent Document 1, since the rotation speed of the winding drum for rotating the package is the same for all the spinning units, the package quickly rotates even after the yarn splicing operation. As a result, the yarn is quickly wound after the yarn joining operation. Therefore, even when the package is stopped after detecting that the yarn splicing has failed, there is a high possibility that the yarn end has already been wound around the package. Therefore, the above problem appears remarkably. Moreover, the yarn winding machine of Patent Document 2 does not disclose a configuration that solves the above-described problem.

  Patent Document 3 discloses control for rotating a package at a low speed after piecing in a mode in which the yarn joining device is inspected. However, there is no description or suggestion that this control is performed during normal winding. Further, after the package is rotated at a low speed after the yarn joining in the mode in which the yarn joining device is inspected, the yarn is once cut, so that the rotational speed of the package does not increase.

  The present invention has been made in view of the above circumstances, and a main object thereof is to provide a yarn winding machine in which a yarn end is difficult to be wound around a package when a yarn splicing fails.

Means and effects for solving the problems

  According to a first aspect of the present invention, a yarn winding machine includes a yarn supplying unit, a winding unit, a yarn joining device, a detecting unit, and a determining unit. The yarn supplying section supplies yarn. The winding unit includes a rotation driving unit that rotates the package, and winds the yarn supplied from the yarn supplying unit onto the package. The yarn splicing device splics the yarn from the yarn supplying unit and the yarn from the winding unit to form a seam. The detection unit detects the seam formed by the yarn joining device. The determination unit determines whether the seam is normal based on a detection result of the detection unit. The winding unit winds the package by increasing the acceleration of the rotational speed of the package after the determination unit determines that the joint is normal.

  As a result, the acceleration of the package is increased to the target speed after the seam is determined to be normal, and the rotational speed of the package until the seam is determined can be suppressed. Therefore, it is difficult for the yarn end to be wound around the package when the splicing fails. Therefore, the yarn end of the package can be reliably captured.

  The yarn winding machine preferably has the following configuration. That is, after the yarn splicing device performs the operation of forming the seam, an average acceleration from when the winding unit starts rotating the package until the determination of the seam by the determination unit is a first acceleration. When the average acceleration from when the determination unit determines that the seam is normal until the rotational speed of the package reaches the target speed is defined as the second acceleration, the winding unit determines that the second acceleration is The rotational speed of the package is changed so as to be larger than the first acceleration.

  Thereby, since the acceleration of the package is low until the determination of the seam is performed by the determination unit, it is possible to suppress the rotation speed of the package after the yarn splicing fails.

  In the yarn winding machine, when the determination unit determines that the seam is not formed or the seam is abnormal, the winding unit preferably stops winding the package.

  Thus, the winding operation can be stopped when the yarn joining fails.

  In the yarn winding machine, when the determination unit determines that the seam is not formed or the seam is abnormal, the winding unit is configured so that the yarn end is wound on the package. It is preferable to stop winding of the package.

  Thereby, the yarn end of the package can be reliably captured.

  The yarn winding machine includes a yarn removal member that performs a yarn removal process that applies a force to the yarn in a direction in which the yarn is detached from the detection unit after the yarn joining device performs the processing to form the seam. Is preferred.

  When the yarn joining fails, the yarn is removed from the detection unit by receiving a force from the yarn removing member. However, when the yarn joining is successful, the yarn does not come off even when the force is received from the yarn removing member. Therefore, by performing the yarn removal process, it is possible to determine at an early timing whether or not the yarn joining has been successful.

  In the yarn winding machine, it is preferable that the yarn removing member is an air ejection portion that ejects air to a yarn path of a yarn wound around the package.

  Accordingly, it is possible to remove the yarn from the detection unit almost certainly when the yarn joining fails, while preventing excessive tension from being applied to the yarn when the yarn joining succeeds. Moreover, for example, the number of parts can be reduced by using the air ejection part for removing yarn waste as the yarn removal member.

  In the yarn winding machine, the yarn removing member is removed from the detecting unit after the winding of the package by the winding unit is started and the slack that occurs when the yarn of the yarn joining device is released is eliminated. It is preferable to remove the yarn.

  As a result, the yarn removal member can be made to perform the yarn removal processing at a relatively early timing, so that it can be determined at a relatively early timing whether or not the yarn joining has succeeded.

  In the above-described yarn winding machine, the yarn joining device includes a holding unit that holds the yarn to be spliced and holds the yarn holding unit that draws the yarn held by the holding unit. The winding unit removes the yarn from the detection unit after the holding unit releases the yarn and before the yarn feeding unit releases the yarn.

  As a result, the yarn removal member can be made to perform the yarn removal process at a very early timing, so it is possible to determine at a very early timing whether or not the yarn joining has succeeded.

  The yarn winding machine includes a suppression unit and a capture guide device. The suppression unit suppresses the movement of the yarn that is detached from the detection unit by the yarn removing member. The catching and guiding device catches the yarn end from the package that is restrained by the restraining portion and guides it to the yarn joining device.

  Thereby, when the yarn joining fails and the yarn joining is performed again, the catching and guiding device can catch the yarn end more reliably.

  The yarn winding machine preferably includes a yarn storage device that stores yarn between the yarn supplying unit and the winding unit.

  Even when the yarn winding machine includes a yarn storage device, it is possible to determine at an early timing whether or not the yarn splicing has been successful, so that the yarn is stored for a period until the determination by the determination unit is performed. The amount can be reduced. Therefore, it is possible to reduce the amount of yarn to be discarded when the splicing fails and the time for disposal.

  The yarn winding machine preferably includes a control unit that controls at least the winding unit, the yarn joining device, and the detection unit.

  Thereby, since many members are controlled by the single control part, control can be performed smoothly.

  According to the second aspect of the present invention, the yarn winding method includes a yarn joining step, a detection step, a determination step, and a winding step. In the yarn splicing step, the yarn from the yarn supplying unit that supplies the yarn and the yarn from the winding unit that winds the yarn supplied by the yarn supplying unit around the package are spliced to form a seam. In the detection step, the seam formed in the yarn joining step is detected. In the determination step, it is determined whether or not the seam is normal based on the detection result in the detection step. In the winding process, after the determination process determines that the seam is normal, the package is wound by increasing the acceleration of the rotational speed of the package.

  As a result, the acceleration of the package is increased to the target speed after the seam is determined to be normal, and the rotational speed of the package until the seam is determined can be suppressed. Therefore, it is difficult for the yarn end to be wound around the package when the splicing fails. Therefore, the yarn end of the package can be reliably captured.

The side view which shows the structure of the spinning unit with which the spinning machine which concerns on one Embodiment of this invention is provided. The expansion perspective view which shows the shape of a thread | yarn storage apparatus and a 1st guide. The perspective view which shows the structure of a yarn splicing device. The perspective view which shows the structure of a thread | yarn monitoring apparatus. The flowchart which shows the process which a spinning unit performs at the time of a thread break or a yarn cut. The graph which shows the change of the rotational speed of the package at the time of succeeding in the yarn splicing based on this embodiment and a prior art example. The side view which shows the spinning unit during yarn splicing. The side view which shows the spinning unit at the time of a successful yarn splicing. The side view of the spinning unit which shows a state where the yarn end of the second yarn is removed by the yarn removing device at the time of yarn joining failure. FIG. 6 is a side view of the spinning unit showing that the second catching and guiding device 28 catches the yarn end of the second yarn when the yarn splicing fails. The graph which shows the change of the rotational speed of the package at the time of succeeding in the yarn splicing which concerns on a modification.

  Next, a spinning machine (yarn winding machine) according to an embodiment of the present invention will be described with reference to the drawings. In this specification, “upstream” and “downstream” mean upstream and downstream in the traveling direction of the fiber bundle and spun yarn during spinning.

  The spinning machine includes a large number of spinning units 2 arranged side by side and an unillustrated machine base control device that centrally manages the spinning units 2. Each spinning unit 2 produces a spun yarn 10 by spinning the fiber bundle 8 sent from the draft device 7 with an air spinning device (yarn supplying unit) 9, and winds the spun yarn 10 with a winding unit 26. Then, the package 50 is formed.

  As shown in FIG. 1, each spinning unit 2 includes a draft device 7, an air spinning device 9, a yarn storage device 22, a yarn joining device 23, and a yarn monitoring device arranged in order from upstream to downstream. (Detection unit) 25 and a winding unit 26 are provided. Each unit included in the spinning unit 2 is controlled by a unit controller 90 provided in the spinning unit 2. However, each part with which the spinning unit 2 is provided may be controlled by a machine control device.

  The draft device 7 includes four draft rollers: a back roller 16, a third roller 17, a middle roller 19 on which a rubber apron belt 18 is mounted, and a front roller 20 in this order from the upstream side. Each draft roller is rotationally driven at a predetermined rotational speed. The draft device 7 has opposing rollers arranged to face each draft roller.

  The draft device 7 holds the sliver 15 supplied from a sliver case (not shown) via a sliver guide between the draft roller and the opposing roller, and conveys it until a predetermined fiber amount (or thickness) is obtained. The fiber bundle 8 is drawn (drafted).

  An air spinning device 9 is disposed immediately downstream of the front roller 20. The air spinning device 9 twists the fiber bundle 8 supplied from the draft device 7 to generate a spun yarn 10. In this embodiment, a pneumatic spinning device that twists the fiber bundle 8 using a swirling air flow is employed.

  A first guide 61 (FIG. 2) for guiding the spun yarn 10 is disposed downstream of the pneumatic spinning device 9. The first guide 61 guides the spun yarn 10 to the yarn storage device 22. The first guide 61 is movable to draw the spun yarn 10 to the yarn accumulating device 22 when performing yarn splicing or the like.

  A yarn storage device 22 is provided downstream of the first guide 61. The yarn storage device 22 includes a yarn storage roller 41, an electric motor 42 that rotationally drives the yarn storage roller 41, and a yarn hooking member 43. When the spun yarn 10 is wound around the outer peripheral surface of the yarn accumulating roller 41, the spun yarn 10 is temporarily stored.

  A yarn hooking member 43 is attached to the downstream end of the yarn accumulating roller 41. The yarn hooking member 43 is supported so as to be rotatable relative to the yarn accumulating roller 41. A permanent magnet is attached to either the yarn hooking member 43 or the yarn accumulating roller 41, and a magnetic hysteresis material is attached to the other. By these magnetic means, a torque is generated that resists the yarn hooking member 43 from rotating relative to the yarn accumulating roller 41. Therefore, only when a force that overcomes this torque is applied to the yarn hooking member 43 (when a predetermined or higher yarn tension is applied), the yarn hooking member 43 rotates relative to the yarn accumulating roller 41, and The spun yarn 10 wound around the yarn accumulating roller 41 can be unwound. When the force overcoming this torque is not applied to the yarn hooking member 43, the yarn storage roller 41 and the yarn hooking member 43 rotate integrally, and the spun yarn 10 is stored in the yarn storage roller 41.

  In this way, the yarn storage device 22 unwinds the spun yarn 10 when the downstream yarn tension increases, and stops the disentanglement of the spun yarn 10 when the yarn tension decreases (the spun yarn 10 is likely to loosen). To work. Thereby, the yarn accumulating device 22 can eliminate the slackness of the spun yarn 10 and apply an appropriate tension to the spun yarn 10. Further, the yarn hooking member 43 operates so as to absorb the fluctuation of the tension applied to the spun yarn 10 between the yarn accumulating device 22 and the winding unit 26 as described above. It is possible to prevent the spun yarn 10 between 9 and the yarn storage device 22 from being affected.

  A second guide 62 that suppresses the behavior of the spun yarn 10 unwound from the yarn storage roller 41 is provided downstream of the yarn storage roller 41. A yarn joining device 23 is provided downstream of the second guide 62. When the spun yarn 10 between the pneumatic spinning device 9 and the package 50 is in a divided state for some reason, the yarn splicing device 23 is connected to the spun yarn 10 (first yarn) from the pneumatic spinning device 9 and the package 50. The spun yarn 10 (second yarn) is spliced. In the present embodiment, the yarn joining device 23 is a splicer device that twists yarn ends together by a swirling air flow generated by compressed air. However, the yarn joining device 23 is not limited to the splicer device, and a mechanical knotter or the like can be employed, for example.

  The spinning unit 2 includes a first catching guide device 27 and a second catching guide device (capturing guide device) 28 that guide the spun yarn 10 to the yarn joining device 23.

  The base part of the first catching and guiding device 27 is rotatably supported, and the first catching and guiding device 27 can rotate in the vertical direction with the base part as a rotation center. The first catching and guiding device 27 is configured in a hollow shape and is connected to a blower (not shown), and can generate a suction air flow. The first catching and guiding device 27 can catch the yarn end of the first yarn by rotating downward (see FIG. 7). The first catching and guiding device 27 can guide the first yarn to the yarn joining device 23 by catching the first yarn and then rotating upward.

  The base part of the second catching and guiding device 28 is rotatably supported, and can be rotated in the vertical direction with the base part as a center of rotation. The second catching and guiding device 28 is also configured in a hollow shape and is connected to a blower (not shown), and can generate a suction air flow. The second catching and guiding device 28 can catch the yarn end of the second yarn by rotating upward (see FIG. 7). The second catching and guiding device 28 can guide the second yarn to the yarn joining device 23 by catching the second yarn and then rotating downward.

  By driving the yarn joining device 23 in a state where the first yarn and the second yarn are guided by the yarn joining device 23, the first yarn and the second yarn are joined, and the air spinning device 9 and the package 50 The spun yarn 10 is in a continuous state. Thereby, winding of the spun yarn 10 around the package 50 can be resumed.

  Hereinafter, a specific configuration and yarn joining operation of the yarn joining device 23 will be described with reference to FIG. As shown in FIG. 3, the yarn joining device 23 includes a yarn joining nozzle 71, a pair of yarn gathering levers (yarn gathering portions) 72, a pair of clamp portions (holding portions) 73, a yarn pressing lever 74, and a pair of An untwisting pipe 75 and a pair of cutters 76 are provided.

  A yarn joining hole 70 is formed in the yarn joining nozzle 71. An unillustrated jet outlet for jetting compressed air is formed inside the yarn splicing hole 70. A swirling air flow can be generated inside the yarn splicing hole 70 by jetting compressed air from the jet outlet.

  The yarn shifting lever 72, the clamp portion 73, and the yarn pressing lever 74 are all arranged in pairs so as to sandwich the yarn joining nozzle 71. The yarn shifting lever 72 moves the first yarn and the second yarn guided by the yarn joining device 23 toward the yarn joining nozzle 71. The clamp portion 73 holds the first yarn and the second yarn in a state guided by the yarn joining nozzle 71 with a predetermined portion therebetween. The yarn presser lever 74 presses and fixes the upper yarn and the lower yarn when the yarn is spliced by the yarn splicing nozzle 71.

  Two untwisting pipes 75 for the first yarn and the second yarn are arranged. Each untwisted pipe 75 is configured such that compressed air is ejected from a compressed air passage (not shown).

  The first yarn and the second yarn guided by the yarn joining device 23 are moved toward the untwisting pipe 75 by the yarn moving lever 72 and are held by the clamp portion 73. The first yarn and the second yarn are each cut to a predetermined length by the cutter 76.

  Before and after this yarn cutting, the first yarn and the second yarn are untwisted by unwinding the fibers at the yarn ends by the air flow inside the respective untwisting pipes 75. When the yarn end untwisting is completed, the first yarn and the second yarn are pulled out from the untwisting pipe 75 by the yarn holding operation of the yarn holding lever 74 and overlap each other in the yarn joining hole 70 of the yarn joining nozzle 71. Fixed in state. In this state, the compressed air is jetted into the yarn joining hole 70 to generate a swirling flow of the compressed air, which is twisted to form a seam. When the formation of the seam is completed, the holding of the first yarn and the second yarn by the clamp portion 73 is released, and the operations of the yarn moving lever 72 and the yarn holding lever 74 are released.

  A yarn monitoring device 25 is provided downstream of the yarn joining device 23. The yarn monitoring device 25 monitors the thickness of the traveling spun yarn 10 with a capacitance sensor. As shown in FIG. 4, the yarn monitoring device 25 includes a housing 80, a first air ejection portion (yarn removal member, air ejection portion) 82, and a second air ejection portion (yarn removal member, air ejection portion) 83. And a cutter 85. The cutter 85 may be provided independently instead of being provided in the yarn monitoring device 25.

  The housing 80 has a slit-shaped recess 81 formed therein. The spun yarn 10 travels inside the recess 81. The recess 81 is formed as a linear groove with one side open, and the inside of the recess 81 serves as a detection region for the spun yarn 10. The cutter 85 is disposed upstream of the detection region in the yarn traveling direction.

  A first air outlet 82 a is formed in the inner wall on the back side of the recess 81 in the first air ejection part 82. The 1st air ejection part 82 produces | generates the flow of the air along the side wall of the groove-shaped recessed part 81 by ejecting air from the 1st blower outlet 82a, and can blow air on the cutter 85 grade | etc.,.

  The second air ejection part 83 is formed with a slit-shaped second air outlet 83a. The second air ejection portion 83 is inclined in the direction of the arrow in FIG. 4, that is, in the direction of the width of the groove-shaped recess 81 and in the direction inclined to the yarn traveling direction. Can blow air. Air blown out from the second air outlet 83a of the second air blowing portion 83 is blown into the inside from the opening side of the concave portion 81 and the upstream side of the yarn traveling, and strikes the side wall on one side of the groove-like concave portion 81 obliquely. In addition, a spiral air flow can be generated in the recess 81 and air can be blown onto the detection region or the like.

  As a result, even if foreign matter such as lint or fiber enters the inside of the recess 81, the foreign matter is ejected out of the recess 81 by ejecting air from the first air ejection portion 82 and the second air ejection portion 83. It can be removed by blowing away.

  Further, the yarn monitoring device 25 transmits the measured quality of the spun yarn 10 to the unit controller (determination unit, control unit) 90. Thereby, the unit controller 90 determines whether or not the seam formed by the yarn splicing device 23 is normal, or determines a yarn defect (location where the thickness is abnormal) of the spun yarn 10 being wound up. can do. When the unit controller 90 determines that there is a seam abnormality or a yarn defect, the unit controller 90 drives a cutter 85 (yarn cutting device) disposed near the yarn monitoring device 25 to cut the spun yarn 10. The yarn monitoring device 25 is not limited to the electrostatic capacitance type sensor, and for example, the thickness of the spun yarn 10 may be monitored by a light transmission type sensor. Moreover, you may monitor the foreign material contained in the spun yarn 10 as a yarn defect. Alternatively, the cutter 85 may be omitted, and the spun yarn 10 may be cut by interrupting the generation of the spun yarn 10 by the pneumatic spinning device 9.

  A winding unit 26 is disposed downstream of the yarn storage device 22. The winding unit 26 includes a cradle arm 52, a winding drum 53, and a winding drum drive motor (rotation drive unit) 54. The yarn path from the yarn storage device 22 to the winding unit 26 is bent and guided by the downstream guide 63. Further, a suppression guide (suppression unit) 64 is disposed in the vicinity of the downstream guide 63.

  The cradle arm 52 can rotatably support a winding tube 51 for winding the spun yarn 10. The cradle arm 52 can rotate around its root portion as a rotation center. Thereby, even if the spun yarn 10 is wound around the take-up tube 51 and the diameter of the package 50 is increased, the take-up of the spun yarn 10 can be appropriately continued.

  The winding drum 53 rotates while being in contact with the winding pipe 51 or the outer peripheral surface of the package 50 when the driving force of the winding drum drive motor 54 is transmitted. A traverse groove (not shown) is formed on the outer peripheral surface of the winding drum 53, and the spun yarn 10 can be traversed with a predetermined width by the traverse groove. Thus, the winding unit 26 can form the package 50 by winding the spun yarn 10 around the winding tube 51 while traversing the spun yarn 10. Thus, in this embodiment, since the winding drum drive motor 54 is provided for each spinning unit 2, the winding drum 53 can be rotated at different speeds between the spinning units 2.

  Next, processing performed by the spinning unit 2 when yarn breakage or yarn cut occurs will be described with reference to FIGS. Note that the process shown in the flowchart of FIG. 5 is an example, and the order of the processes may be changed, or two processes may be performed simultaneously.

  When yarn breakage occurs during winding of the package 50, or when the spun yarn 10 is cut by the cutter 85, the spun yarn 10 is in a divided state. When the spinning unit 2 detects this yarn breakage or yarn breakage (S101), the spinning of the package 50 is stopped using a package brake or the like (S102), and the draft of the fiber bundle 8 of the draft device 7 is stopped. The spinning of the pneumatic spinning device 9 is stopped. Further, the first guide 61 moves to a position away from the yarn accumulating device 22.

  Next, an operation of capturing the separated yarn end and guiding it to the yarn joining device 23 is performed (S103). Specifically, as shown in FIG. 7, the second catching and guiding device 28 catches the second yarn by rotating upward. Thereafter, the second catching and guiding device 28 rotates downward while the winding unit 26 rotates the package 50 in the reverse direction. Thereby, the second yarn is guided to a position where the yarn joining device 23 can perform the yarn joining. The first catching and guiding device 27 moves downward to a position where the first yarn can be caught. Then, the draft of the fiber bundle 8 by the draft device 7 is resumed, and the spinning by the pneumatic spinning device 9 is resumed, whereby the first yarn is sucked and captured by the first capture guide device 27. Thereafter, the first catching and guiding device 27 rotates upward while sucking the first yarn. As a result, the first yarn is guided to a position where the yarn joining device 23 can perform the yarn joining. Thereafter, the first guide 61 moves so as to approach the yarn storage device 22. Thereby, the spun yarn 10 can be hooked on the yarn hooking member 43 of the yarn accumulating device 22.

  Next, the yarn joining device 23 performs a yarn joining operation to form a seam between the first yarn and the second yarn (S104). Thereafter, the winding unit 26 rotates the package 50 to wind the spun yarn 10. At this time, the winding unit 26 accelerates the package 50 with the first acceleration as shown in FIG. The first acceleration is a value smaller than the second acceleration shown in FIG. 6A and the acceleration in the conventional example shown in FIG. 6B.

  Next, the spinning unit 2 performs a yarn removal process (S106). The yarn removing process is a process of applying a force to the spun yarn 10 so that the spun yarn 10 is removed from the detection area of the yarn monitoring device 25. In the present embodiment, the yarn removal process is performed by ejecting air from at least one of the first air ejection part 82 and the second air ejection part 83.

  If the yarn splicing is successful, the spun yarn 10 is continuous and tension is applied as shown in FIG. On the other hand, when the yarn joining fails, the second yarn is detached from the yarn monitoring device 25 as shown in FIG. The second yarn removed from the yarn monitoring device 25 is guided by the suppression guide 64. Thereby, the behavior of the second yarn is suppressed, and the position of the yarn end of the second yarn can be easily specified.

  By performing the yarn removal process early, it is possible to determine the failure of yarn joining at an early timing. For this reason, for example, it is preferable to perform the process after the yarn joining device 23 has performed the process of forming the seam and after the slack that occurs when the spun yarn 10 is released is eliminated. It can also be performed after the clamp portion 73 releases the spun yarn 10 and before the yarn shifting lever 72 releases the first yarn and the second yarn.

  After the yarn removal process, the unit controller 90 determines whether or not the seam formed on the spun yarn 10 is normal (S107). The unit controller 90 determines that the joint is normal when the joint of the spun yarn 10 detected by the yarn monitoring device 25 satisfies a predetermined condition (thickness, etc.). Alternatively, the unit controller 90 may determine that the seam is normal when the spun yarn 10 can be detected continuously for a predetermined time. On the other hand, the unit controller 90 determines that the splicing has failed when the joint detected by the yarn monitoring device 25 does not satisfy the predetermined condition and when the spun yarn 10 is no longer detected by the yarn monitoring device 25 ( S108).

  When it is determined that the yarn joining has failed, the unit controller 90 determines whether the yarn joining has failed continuously for a predetermined number of times (S109). If it fails continuously for a predetermined number of times or more, the spinning unit 2 notifies the operator of an error with a lamp and an alarm sound (not shown) (S110).

  If it has not failed continuously for a predetermined number of times, the winding unit 26 stops the rotation of the package 50 (S102). As described above, since the package 50 is rotated at a low first acceleration in the present embodiment, the rotational speed of the package 50 when it is determined that the splicing has failed is low. Therefore, the package 50 can be stopped before the yarn end of the second yarn is wound around the package 50. Accordingly, as shown in FIG. 10, the second catching and guiding device 28 can suck and catch the yarn end in a state where the yarn end is separated from the package 50. Accordingly, it is possible to reduce the probability that a yarn end catching error occurs. Further, since it is possible to determine at an early timing whether or not the yarn splicing has been successful, it is possible to suppress the storage amount of the yarn storage device 22 during the period until the determination by the unit controller 90 is performed. Therefore, since the amount of spun yarn 10 to be discarded can be reduced, the winding efficiency can be improved. Thereafter, the spinning unit 2 performs the processing from step S102 onward in the same manner as described above.

  When the unit controller 90 determines that the seam is normal (when determined Yes in S107), the winding unit 26 increases the rotational speed of the package 50 at the second acceleration (S111, FIG. 6A). reference). The second acceleration is larger than the first acceleration and the conventional acceleration.

  Thereafter, the winding unit 26 determines whether or not the rotational speed of the package 50 has reached the target speed (S112), and ends the acceleration of the package 50 at the timing when the target speed is reached (S113). By increasing the acceleration of the package 50 as described above, the target speed can be reached in a short time.

  Next, a modification of the above embodiment will be described with reference to FIG. In this modification, the configuration of the spinning unit 2 is the same as that of the above embodiment. However, this modification differs from the above embodiment in that the yarn removal process is performed before the package 50 is rotated after the yarn splicing.

  As described above, if the failure of the splicing can be detected quickly, the package 50 can be stopped at a low speed, so that the yarn end of the second yarn is not easily wound on the package 50. For this reason, in this modification, the yarn removal process is performed after the process of forming the seam and before the package 50 is rotated. Since the spun yarn 10 is slack after the process of forming the seam, there is a possibility that the spun yarn 10 may be detached from the yarn monitoring device 25 by the yarn removal process even if the splicing is successful. Therefore, it is necessary to apply tension to the spun yarn 10 by a tension applying device or the like.

  If the yarn monitoring device 25 no longer detects the spun yarn 10 by performing the yarn removal process, the yarn joining has failed. In this case, since the package 50 does not need to be rotated unnecessarily, the yarn splicing can be performed again at an early timing.

  As described above, the spinning machine includes the pneumatic spinning device 9, the winding unit 26, the yarn joining device 23, the yarn monitoring device 25, and the unit controller 90. The pneumatic spinning device 9 supplies the spun yarn 10. The winding unit 26 includes a winding drum drive motor 54 that rotates the package 50, and winds the spun yarn 10 supplied from the pneumatic spinning device 9 around the package 50. The yarn joining device 23 joins the first yarn from the pneumatic spinning device 9 and the second yarn from the winding unit 26 to form a seam. The yarn monitoring device 25 detects the seam formed by the yarn joining device 23. The unit controller 90 determines whether or not the seam is normal based on the detection result of the yarn monitoring device 25. The winding unit 26 winds up the package 50 by increasing the acceleration of the rotational speed of the package 50 after the unit controller 90 determines that the seam is normal.

  Thereby, after the joint is determined to be normal, the acceleration of the package 50 is increased to accelerate to the target speed, so that the rotational speed of the package 50 until the joint is determined can be suppressed. Therefore, the yarn end is not easily wound on the package 50 when the yarn joining fails. Therefore, the yarn end of the package 50 can be reliably captured.

  In the spinning machine of this embodiment, after the yarn splicing device 23 performs the operation of forming the seam, the average until the unit controller 90 determines the seam after the winding unit 26 starts rotating the package 50. When the average acceleration from when the unit controller 90 determines that the seam is normal until the rotational speed of the package 50 reaches the target speed is the second acceleration, the winding unit 26 The rotational speed of the package 50 is changed so that the second acceleration is greater than the first acceleration.

  Thereby, since the acceleration of the package 50 is low until the seam determination is performed by the unit controller 90, the rotation speed of the package 50 after the failure of the yarn splicing can be suppressed.

  Further, in the spinning machine of the present embodiment, when the unit controller 90 determines that the seam is not formed or the seam is abnormal, the winding unit 26 is configured to wind the yarn end before being wound on the package 50. The winding of the package 50 is stopped.

  Thereby, the yarn end of the package 50 can be reliably captured.

  Further, in the spinning machine of the present embodiment, after the yarn joining device 23 performs the process of forming the seam, the first air ejection unit 82 and the second air jetting unit 82 apply force to the yarn in a direction in which the yarn is detached from the yarn monitoring device 25. An air ejection part 83 is provided.

  If the yarn splicing fails, the yarn is removed from the yarn monitoring device 25 by receiving a force from the first air ejecting portion 82 and the like, but if the yarn splicing is successful, the yarn is received even if the force is received from the first air ejecting portion 82 and the like. Will not come off. Therefore, by performing the yarn removal process, it is possible to determine at an early timing whether or not the yarn joining has been successful.

  The preferred embodiments and modifications of the present invention have been described above, but the above configuration can be modified as follows, for example.

  In the above embodiment, the first air ejection part 82 and the second air ejection part 83 included in the yarn monitoring device 25 have been described as the yarn removal members. However, the air ejection part may be provided in another part. In addition, if the configuration is such that force is applied to the spun yarn 10 with a force that does not affect the yarn quality even when the yarn splicing is successful, a solid is brought into contact with the spun yarn 10 instead of a fluid such as air. Also good.

  The unit controller 90 determines that the spun yarn 10 does not exist when the yarn monitoring device 25 does not detect the spun yarn 10 for a predetermined time or more immediately after splicing and during normal winding. This criterion may be changed between immediately after piecing and during normal winding. Immediately after the yarn splicing, the predetermined time can be shortened to make a quick determination. As a result, the rotational speed of the package 50 when it is determined that the splicing has failed can be further reduced.

  A device for determining the seam and a device for monitoring the quality of the traveling spun yarn 10 may be provided separately.

  In the above embodiment, the first acceleration and the second acceleration are constant, but at least one of the first acceleration and the second acceleration may be changed. Even in this case, the average acceleration from the completion of the splicing to the time when the seam is determined to be normal may be smaller than the average acceleration from the time when the seam is determined to be normal until the target speed is reached. preferable.

  In the above embodiment, the unit controller 90 of the spinning unit 2 determines the detection result of the yarn monitoring device 25. This determination may be performed by a control unit that controls the yarn monitoring device 25 or may be performed by a machine base control device.

  In the above embodiment, the present invention is applied to a spinning machine in which the package 50 is formed above the spinning unit 2, but a spinning machine having a configuration in which the package 50 is formed below the spinning unit 2 (JP 2013-67892 A, etc.) ) Can also be applied to the present invention. The present invention can also be applied to a yarn winding machine such as an automatic winder. In this case, the configuration for unwinding the yarn from the yarn feeding bobbin corresponds to the yarn feeding portion.

2 Spinning unit 7 Draft device 9 Pneumatic spinning device (yarn feeding unit)
23 Yarn splicing device 25 Yarn monitoring device (detection unit)
26 Winding unit 27 First capture guide device 28 Second capture guide device (capture guide device)
53 Winding drum 54 Winding drum drive motor (rotation drive)
64 Suppression guide (Suppression part)
72 Yarn-feeding lever (yarn-feeding section)
73 Clamp part (holding part)
82 1st air ejection part (thread removal member, air ejection part)
83 2nd air ejection part (thread removal member, air ejection part)
90 unit controller (determination unit, control unit)

Claims (12)

A yarn supplying section for supplying yarn;
A winding unit that has a rotation driving unit that rotates the package, and winds the yarn supplied by the yarn supplying unit around the package;
A yarn splicing device for splicing the yarn from the yarn feeding portion and the yarn from the winding portion to form a seam;
A detection unit for detecting the seam formed by the yarn joining device;
A determination unit that determines whether the seam is normal based on a detection result of the detection unit;
With
The winding unit winds up the package by increasing the acceleration of the rotational speed of the package after the determination unit determines that the joint is normal. The yarn winding machine according to claim 1,
After the yarn joining device performs the operation of forming the seam, an average acceleration from when the winding unit starts rotating the package until the judgment of the seam is made by the judgment unit is a first acceleration,
When the average acceleration from when the determination unit determines that the seam is normal until the rotational speed of the package reaches a target speed is the second acceleration,
The yarn winding machine, wherein the winding unit changes a rotational speed of the package so that the second acceleration is larger than the first acceleration. The yarn winding machine according to claim 1 or 2,
The yarn winding machine, wherein when the determination unit determines that the seam is not formed or the seam is abnormal, the winding unit stops winding the package. A yarn winding machine according to claim 3,
When the determination unit determines that the seam is not formed or the seam is abnormal, the winding unit stops winding the package before the yarn end is wound on the package. A yarn winding machine characterized by that. A yarn winding machine according to any one of claims 1 to 4,
A yarn winding machine, comprising: a yarn removal member that performs a yarn removal process that applies a force to the yarn in a direction in which the yarn is removed from the detection unit after the yarn joining device performs the processing to form the seam. A yarn winding machine according to claim 5,
The yarn winding machine, wherein the yarn removing member is an air ejection portion that ejects air to a yarn path of a yarn wound around the package. The yarn winding machine according to claim 5 or 6,
The yarn removing member removes the yarn from the detection unit after the winding of the package by the winding unit is started and the slack that occurs when the yarn of the yarn joining device is released is eliminated. Yarn winding machine. The yarn winding machine according to claim 5 or 6,
The yarn joining device includes a holding unit that holds the yarn to be spliced, and a yarn moving unit that draws the yarn held by the holding unit,
The yarn winding machine, wherein the winding unit removes the yarn from the detection unit after the holding unit releases the yarn and before the yarn feeding unit releases the yarn. A yarn winding machine according to any one of claims 5 to 8,
A suppression unit that suppresses the movement of the yarn that is removed from the detection unit by the yarn removal member;
A catching and guiding device for catching and guiding the yarn from the package suppressed by the suppressing unit to the yarn joining device;
A yarn winding machine comprising: A yarn winding machine according to any one of claims 1 to 9,
A yarn winding machine comprising a yarn storage device that stores yarn between the yarn supplying unit and the winding unit. A yarn winding machine according to any one of claims 1 to 10,
A yarn winding machine comprising: a control unit that controls at least the winding unit, the yarn joining device, and the detection unit. A yarn splicing step of splicing a yarn from a yarn supplying portion for supplying a yarn and a yarn from a winding portion for winding the yarn supplied by the yarn supplying portion into a package to form a seam;
A detection step of detecting the seam formed in the yarn joining step;
A determination step of determining whether or not the seam is normal based on a detection result in the detection step;
A winding step of winding the package by increasing the acceleration of the rotational speed of the package after the joint is determined to be normal in the determination step;
A yarn winding method comprising:

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