JP2016016958A - Yarn winder and yarn winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winder that can cut off yarn without specially adding a cutter.SOLUTION: A spinning unit 2 equipped on a fine spinning machine comprises a yarn feeding portion 5, a winding device 26, a yarn splicing device 23, and a yarn joint monitoring device 25. The yarn feeding portion 5 supplies spun yarn 10. The winding device 26 winds the spun yarn 10 onto a package 50. The yarn splicing device 23 has a cutter. The yarn joint monitoring device 25 monitors the spun yarn. The fine spinning machine (the spinning unit 2) cuts, on the basis of a monitoring result obtained by the yarn joint monitoring device 25, the spun yarn 10 in a continuous state with the cutter of the yarn splicing device 23.SELECTED DRAWING: Figure 8

Description

  The present invention mainly relates to a yarn winding machine including a yarn joining device.

  Conventionally, a yarn winding machine that winds a yarn around a bobbin to form a package is known. The yarn winding machine generally includes a yarn monitoring device that detects a yarn defect and a yarn joining device that performs yarn joining. Patent document 1 discloses this kind of yarn winding machine.

  A yarn winding machine disclosed in Patent Document 1 includes a yarn feeding unit, a winding device that winds a yarn around a package, a package rotation speed detection unit that detects the rotation speed of the package, and a seam formed by splicing the yarn. And a determination unit that determines whether or not the seam is normal. The determination unit determines that the seam formed by the yarn joining device is normal based on the traveling speed of the yarn acquired based on the detection result of the package rotation speed detecting unit and the monitoring result by the joint monitoring device. Determine if there is.

  Patent Document 1 accurately obtains the yarn traveling speed at the time of resuming winding based on the measured value of the rotational speed of the package, and determines the quality of the seam by judging the quality of the seam based on this yarn traveling speed. Assume that it can be determined accurately.

JP 2013-067892 A

  In the configuration of Patent Document 1, when a seam defect is detected by the seam monitoring device, the yarn joining cart having the yarn joining device is provided separately from the yarn joining device in order to remove the defective seam. Cut the defective seam with a cutter. However, if a separate cutter is provided, the cost increases accordingly. Further, when a yarn is cut with a cutter as in Patent Document 1 when a defective seam is detected, the yarn is irregularly exposed due to rapid release of tension applied to the yarn or twisting and shrinking of the yarn. Sometimes. This makes it difficult for the yarn end to be caught, and the efficiency of the yarn splicing operation is reduced.

  An object of the present invention is to provide a yarn winding machine capable of cutting a yarn without adding a cutter in particular.

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 device, a yarn joining device, and a yarn monitoring device. The yarn supplying section supplies yarn. The winding device winds the yarn around a package. The yarn splicing device has a cutter. The yarn monitoring device monitors the yarn. Based on the monitoring result of the yarn monitoring device, the continuous yarn is cut by the cutter of the yarn joining device.

  As a result, the yarn can be cut with the cutter provided in the yarn joining device without specially providing a cutter. Therefore, the yarn can be cut with a simple configuration based on the monitoring result of the yarn monitoring device.

  In the yarn winding machine, the yarn monitoring device is disposed on the downstream side of the yarn joining device. Based on the monitoring result of the yarn seam by the yarn monitoring device, the yarn is cut by the cutter.

  Thereby, the seam of the yarn formed by the yarn joining device can be sent to the downstream side by winding by the winding device, and the quality of the seam can be immediately judged by the yarn monitoring device. Therefore, if the formed seam is good, the winding can be continued as it is, and even if the seam is bad, the seam failure can be detected at the initial stage of acceleration of the winding speed of the winding device, and the winding can be performed. It can be stopped in a short time. As a result, when the piecing is performed again, the piecing can be performed efficiently.

  In the yarn winding machine, when the yarn monitoring device detects that the yarn seam is defective, the yarn is cut by the cutter after the winding device stops winding. Is preferred.

  As a result, the cut yarn end is not wound on the package in the winding device. Therefore, when the yarn joining is performed again, the yarn end can be reliably captured.

  In the yarn winding machine, the yarn joining device includes a holding portion that holds the yarn. The cutting of the yarn performed by the cutter based on the monitoring result of the yarn monitoring device is performed in a state where the holding unit holds the yarn.

  Thereby, it is possible to prevent the yarn end formed by cutting the yarn from being unraveled due to a rapid release of the yarn tension and / or twisting of the yarn.

  In the yarn winding machine, it is preferable that the portion where the holding portion holds the yarn is downstream of the portion where the yarn is cut by the cutter.

  As a result, among the yarn ends formed by cutting the yarn, the downstream (package side) yarn end can be held by the holding portion. Accordingly, it is possible to prevent the yarn end connected to the package from being violated, and therefore, when piecing is performed again, the piecing can be performed efficiently.

  The yarn winding machine includes a yarn catcher that catches the yarn from the package. The holding portion releases the holding of the yarn after the yarn catching portion has moved to a position where the yarn held by the holding portion can be caught.

  Thus, the yarn is held by the holding portion so that the yarn does not move and is transferred to the yarn catching portion, so that the yarn catching member can catch the yarn very easily. Therefore, the yarn catching operation can be performed smoothly, and the efficiency of the yarn splicing operation can be further improved.

  In the yarn winding machine, the yarn joining device includes a guide member and a yarn moving lever. A first slit and a second slit are formed in the guide member. A first yarn end that is a yarn end of the yarn from the yarn supplying section is introduced into the first slit at the time of yarn joining. A second yarn end that is a yarn end of the yarn from the package is introduced into the second slit at the time of yarn joining. At the time of yarn joining, the yarn shifting lever performs a yarn shifting operation that brings the first yarn end closer to the back side of the first slit and moves the second yarn end closer to the back side of the second slit. The guide member guides the yarn to one of the first slit and the second slit when performing the yarn gathering operation by the yarn gathering lever to cut the yarn in a continuous state. A guide is provided.

  Accordingly, the continuous yarn is accurately guided into the slit for cutting by the first cutting guide portion of the guide member. As a result, the yarn can be reliably cut.

  In the yarn winding machine, the yarn joining device includes a guide member and a yarn moving lever. A first slit and a second slit are formed in the guide member. A first yarn end that is a yarn end of the yarn from the yarn supplying section is introduced into the first slit at the time of yarn joining. A second yarn end that is a yarn end of the yarn from the package is introduced into the second slit at the time of yarn joining. At the time of yarn joining, the yarn shifting lever performs a yarn shifting operation that brings the first yarn end closer to the back side of the first slit and moves the second yarn end closer to the back side of the second slit. The yarn gathering lever guides the yarn to one of the first slit and the second slit when performing the yarn gathering operation by the yarn gathering lever to cut the continuous yarn. A cutting guide is provided.

  Thus, the continuous yarn is accurately guided into the slit for cutting by the second cutting guide portion of the yarn shifting lever. As a result, the yarn can be reliably cut.

  The yarn winding machine includes a control unit. The control unit controls the yarn joining device to cut the continuous yarn based on the monitoring result of the yarn monitoring device.

  Accordingly, the yarn can be automatically cut by the cutter of the yarn joining device based on the monitoring result of the yarn monitoring device.

  According to a second aspect of the present invention, a yarn winding method relates to a method of winding a yarn in a yarn winding machine having a yarn supplying section, a winding device, a yarn joining device, and a yarn monitoring device. The yarn supplying section supplies yarn. The winding device winds the yarn around a package. The yarn splicing device can splice the yarn. The yarn monitoring device monitors the yarn. In this yarn winding method, the yarn is cut by the yarn joining device based on the monitoring result by the yarn monitoring device.

  Thereby, the yarn can be cut by the yarn joining device without specially providing a configuration for cutting the yarn. Therefore, according to this yarn winding method, the yarn can be efficiently wound.

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 perspective view which looked at the yarn splicing device from the side. The perspective view which looked at the yarn splicing device from the front side. The block diagram which shows the structure for controlling a spinning unit. The side view which shows a mode when a catching guide apparatus catches a thread | yarn. The side view which shows a mode when a capture guide apparatus guides spun yarn to a yarn splicing apparatus. The side view which shows the mode of the moment when a spun yarn begins to wind around a yarn storage device. The side view which shows a mode that the thread | yarn is cut | disconnected by the cutter of a yarn splicing apparatus, and is hold | maintained by the clamp part of a yarn splicing apparatus when the defect of a joint is detected. The side view which shows a mode that the yarn end currently hold | maintained with the yarn joining apparatus is caught by the 2nd catching and guiding apparatus.

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

  A spinning machine (spinning machine, yarn winding machine) includes a plurality of spinning units (yarn winding units) 2 arranged side by side, and a machine control device (not shown) that centrally manages the plurality of spinning units 2. I have. As shown in FIG. 1, each spinning unit 2 forms a package 50 by winding the yarn (spun yarn 10) supplied from the yarn supplying unit 5 with a winding device 26.

  The spinning machine includes a control unit (reference numeral 80 in FIG. 4) that can communicate with the machine base control device. The control unit 80 is configured as a computer including hardware such as a CPU, a ROM, and a RAM, and software such as a control program, and controls each unit included in the spinning unit 2. The control unit 80 may be provided for each spinning unit 2 or may be provided for each of the plurality of spinning units 2.

  As shown in FIG. 1, the spinning unit 2 includes a yarn supplying section 5, a yarn accumulating device 22, and a winding device 26 in order from upstream to downstream.

  The yarn supplying section 5 supplies the yarn (spun yarn 10) that is taken up by the winding device 26. In the present embodiment, the yarn feeding unit 5 includes a draft device 7, a spinning device 9, a delivery roller 21 and a nip roller 31.

  The draft device 7 includes four draft rollers and a counter roller facing each draft roller. The four draft rollers are a back roller 16, a third roller 17, a middle roller 19 equipped with a rubber apron belt 18, and a front roller 20 in this order from the upstream side. Each draft roller is driven to rotate at a predetermined speed.

  The draft device 7 has a predetermined fiber amount (or thickness) by sandwiching and transporting a sliver 15 supplied from a sliver case (not shown) via a sliver guide between a draft roller and a counter roller. The fiber bundle 8 is produced by stretching (drafting) to a maximum.

  The spinning device 9 is disposed immediately downstream of the front roller 20. The spinning device 9 twists the fiber bundle 8 supplied from the draft device 7 to generate the spun yarn 10. The spinning device 9 according to the present embodiment is configured as a pneumatic spinning device that generates a swirling air flow inside and applies the twist to the fiber bundle 8 by applying the swirling air flow.

  Downstream of the spinning device 9, a delivery roller 21 that is rotationally driven at a predetermined speed and a nip roller 31 that can contact and separate from the delivery roller 21 are provided. The spun yarn 10 discharged from the spinning device 9 is sandwiched between the delivery roller 21 and the nip roller 31 and the delivery roller 21 is driven to rotate, whereby the spun yarn 10 can be sent downstream.

  The spun yarn 10 is supplied to the winding device 26 by the yarn supplying section 5 (draft device 7, spinning device 9, delivery roller 21, and nip roller 31) configured as described above. The delivery roller 21 and the nip roller 31 may be omitted, and the spun yarn 10 may be pulled out from the spinning device 9 by the yarn accumulating device 22.

  A yarn quality monitoring device 40 that monitors the quality of the spun yarn 10 is provided immediately downstream of the delivery roller 21 and the nip roller 31. The yarn quality monitoring device 40 monitors the state (thickness, etc.) of the traveling spun yarn 10 with a light transmission type sensor and detects a yarn defect (location where the spun yarn 10 is abnormal) included in the spun yarn 10. . Note that the yarn quality monitoring device 40 is not limited to the light transmission type sensor, and may monitor the spun yarn 10 with, for example, a capacitance type sensor. Moreover, you may monitor the foreign material contained in the spun yarn 10 as a yarn defect.

  If a yarn defect is detected by the yarn quality monitoring device 40, spinning is stopped in the spinning device 9, so that the strength of the spun yarn 10 is reduced in the portion of the spinning device 9, and the spun yarn 10 is cut. . Thus, the spinning device 9 functions as a cutting unit that cuts the spun yarn 10 when the yarn quality monitoring device 40 detects a yarn defect. Thereby, for example, it is not necessary to provide a special cutter in the yarn quality monitoring device 40 or the like, and a simple configuration can be realized. However, a cutter may be provided in the yarn quality monitoring device 40 or the like.

  The winding device 26 forms the package 50 by winding the spun yarn 10 around the bobbin 51 while traversing. The winding device 26 includes a cradle arm 52 and a winding drum 53.

  The cradle arm 52 includes a bearing 55 that rotatably supports the bobbin 51, and the outer peripheral surface of the package 50 can be brought into contact with the outer peripheral surface of the winding drum 53. The winding drum 53 is driven to rotate by rotating the package 50 while the package 50 is in contact with the winding drum 53. As a result, the spun yarn 10 is wound around the package 50. A traverse groove (not shown) is formed on the outer peripheral surface of the winding drum 53. By the traverse groove, the spun yarn 10 wound around the package 50 is traversed with a predetermined width.

  The winding device 26 includes a brake mechanism (not shown) for braking the rotation of the package 50. Although the configuration of the brake mechanism is arbitrary, the brake mechanism may include, for example, a brake shoe that contacts a member that rotates integrally with the package 50, and a pneumatic cylinder that presses the brake shoe. .

  A yarn accumulating device 22 is disposed between the yarn supplying section 5 and the winding device 26 and immediately downstream of the yarn quality monitoring device 40. The yarn storage device 22 includes a yarn storage roller 41 and a storage motor 42 that rotationally drives the yarn storage roller 41. The yarn storage device 22 temporarily stores the spun yarn 10 by winding the spun yarn 10 around the outer peripheral surface of the yarn storage roller 41.

  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 tension or more 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 accumulating roller 41 and the yarn hooking member 43 rotate integrally, and the spun yarn 10 is reserved in the yarn accumulating 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 variation in the yarn tension applied to the spun yarn 10 between the yarn storage device 22 and the winding device 26 as described above. It is possible to prevent the spun yarn 10 between the device 9 and the yarn storage device 22 from being affected.

  The storage motor 42 is configured as an electric motor capable of forward and reverse rotation. In a predetermined case, the storage motor 42 rotates the yarn storage roller 41 in the reverse direction to forcibly unwind the spun yarn 10 wound around the yarn storage roller 41. You can also hesitate.

  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 spinning device 9 and the package 50 is in a divided state for some reason, the yarn joining device 23 and the spun yarn 10 (first yarn) from the 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 catching guide device that guides the spun yarn 10 to the yarn joining device 23. The catching and guiding device includes a first catching and guiding device 27 that guides the first yarn, and a second catching and guiding device (yarn catching portion) 28 that guides the second yarn.

  The first catching and guiding device 27 has a root portion that is rotatably supported. The first catching and guiding device 27 can rotate in the vertical direction with the root portion 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) as a negative pressure source, and can generate a suction air flow at the tip. The first catching and guiding device 27 can move to a position where it can catch the yarn end of the first yarn by rotating downward (see the chain line in FIG. 1). The first catching and guiding device 27 can guide the first yarn to the yarn joining device 23 by turning upward after catching the first yarn.

  The second catching and guiding device 28 has a root portion that is rotatably supported, and can rotate in the vertical direction with the root portion as a rotation center. The second catching and guiding device 28 is also configured in a hollow shape and is connected to a blower (not shown) as a negative pressure source, and can generate a suction air flow at the tip. The second catching and guiding device 28 can move to a position where it can catch the yarn end of the second yarn by rotating upward (see the chain line in FIG. 1). The second catching and guiding device 28 can guide the second yarn to the yarn joining device 23 by turning downward after catching the second yarn.

  By driving the yarn joining device 23 in this state, the first yarn and the second yarn are joined, and the spun yarn 10 is brought into a continuous state between the spinning device 9 and the package 50. Thereby, winding of the spun yarn 10 around the package 50 can be resumed.

  A seam monitoring device (yarn monitoring device) 25 is disposed between the yarn joining device 23 and the winding device 26. The seam monitoring device 25 is disposed on the downstream side of the yarn joining device 23, and can determine whether the joint formed by the yarn joining device 23 is good or not. In the present embodiment, the seam monitoring device 25 is configured to inspect the thickness of the seam by a capacitance type or light transmission type sensor, as in the case of the yarn quality monitoring device 40. However, the configuration of the joint monitoring device 25 is not particularly limited to the configuration having these sensors. Note that the seam monitoring device 25 not only monitors the seam, but also monitors the abnormal thickness of the spun yarn 10 and / or the presence or absence of foreign matter contained in the spun yarn 10, as with the yarn quality monitoring device 40. May be.

  A third guide 63 for guiding the spun yarn 10 is disposed immediately downstream of the joint monitoring device 25. The third guide 63 guides the traveling path of the spun yarn 10 toward the winding device 26 by bending it.

  Next, the yarn joining device 23 will be described in detail with reference to FIGS. The yarn joining device 23 includes a yarn joining nozzle 92, guide plates (guide members) 93 and 94, yarn shifting levers 95 and 96, clamp portions 97 and 98, yarn holding levers 103 and 104, and cutters 99 and 100. The untwisting chambers 105 and 106 are provided as main components.

  As shown in FIG. 3, the yarn joining nozzle 92 is disposed on the front side of the yarn joining device 23 (the surface facing the traveling path of the spun yarn 10). The yarn joining nozzle 92 is formed with a V-shaped groove that opens the traveling path side of the spun yarn 10, and a twisting chamber 92 a capable of ejecting compressed air is provided at the back of the groove. Is formed. The twisting chamber 92a is formed in a cylindrical shape with both ends open, and the spun yarn 10 can be put inside. The yarn joining nozzle 92 generates a swirling air flow inside the twisting chamber 92a by ejecting compressed air into the twisting chamber 92a, and the first yarn guided by the first catching and guiding device 27, 2 The second yarn guided by the catching and guiding device 28 is joined to form a seam.

  The guide plate 93, the yarn shifting lever 95, the clamp portion 97, the yarn holding lever 103, the cutter 99 and the untwisting chamber 105 are disposed upstream of the yarn joining nozzle 92. The guide plate 94, the yarn shifting lever 96, the clamp portion 98, the yarn pressing lever 104, the cutter 100, and the untwisting chamber 106 are disposed downstream of the yarn joining nozzle 92.

  The guide plates 93 and 94 are both formed in a plate shape, and are arranged so as to be substantially perpendicular to the traveling path of the spun yarn 10 during normal winding. “Normal winding” means that the spun yarn 10 between the yarn supplying section 5 and the winding device 26 is in a continuous state and the winding device 26 is winding the spun yarn 10. .

  In the guide plate 93, two slits that open the traveling path side of the spun yarn 10, that is, a first slit 101 and a second slit 102 are formed side by side. In the guide plate 94, two slits that open the traveling path side of the spun yarn 10, that is, a first slit 201 and a second slit 202 are formed side by side. As shown in FIG. 3, the first slit 101 of the guide plate 93 and the first slit 201 of the guide plate 94 are disposed at substantially corresponding positions in the direction of the travel path of the spun yarn 10. The second slit 102 of the guide plate 93 and the second slit 202 of the guide plate 94 are arranged at substantially corresponding positions in the direction of the travel path of the spun yarn 10.

  When the cut spun yarn 10 is spliced by the splicing device 23, the first catching and guiding device 27 guides the first yarn into the first slits 101 and 201, and the second catching and guiding device 28 The second yarn is guided into the second slits 102 and 202.

  The two yarn shifting levers 95 and 96 are arranged between the guide plates 93 and 94 in a direction (closed direction) that enters between the guide plates 93 and 94 around the axis arranged on the side of the yarn joining nozzle 92. Two directions can be simultaneously rotated in the direction of exiting (opening direction). The yarn gathering levers 95 and 96 rotate in the closing direction to push the first yarn guided by the first catching and guiding device 27 into the back of the first slits 101 and 201, and the second catching and guiding device 28. The second yarn guided in step (2) can be pushed into the back of the second slits 102 and 202. The yarn shifting levers 95 and 96 can guide the first yarn and the second yarn into the twisting chamber 92a by rotating in the closing direction.

  The clamp part 97 is attached to the guide plate 93. The clamp part 98 is attached to the guide plate 94. The clamp portions 97 and 98 can be clamped with the spun yarn 10 interposed therebetween. Specifically, the clamp unit 97 can clamp and hold the spun yarn 10 that has entered the first slits 101 and 201. The clamp part (holding part) 98 can clamp and hold the spun yarn 10 that has entered the second slits 102 and 202.

  The thread holding levers 103 and 104 are provided so as to be simultaneously rotatable around an axis disposed in the vicinity of the rotating shafts of the yarn moving levers 95 and 96. The yarn presser levers 103 and 104 press the first and second yarns by rotating in the closing direction when the yarn joining nozzle 92 performs the yarn joining, thereby positioning the first and second yarns. It is configured so that it can be determined.

  The cutter 99 is attached to the guide plate 93. The cutter 100 is attached to the guide plate 94. The cutters 99 and 100 can cut the spun yarn 10. Specifically, the cutter 99 can cut the spun yarn 10 that has entered the first slits 101 and 201, and the cutter 100 can cut the spun yarn 10 that has entered the second slits 102 and 202. .

  The untwisting chambers 105 and 106 are each formed as an elongated space, as shown in FIG. The opening of the untwisting chamber 105 and the opening of the untwisting chamber 106 are arranged with the yarn joining nozzle 92 interposed therebetween. The first yarn can be sucked into the untwisting chamber 105, and the second yarn can be sucked into the untwisting chamber 106. As the compressed air is jetted into the untwisting chambers 105 and 106, a swirling air flow is generated inside the untwisting chambers 105 and 106. Before the yarn joining by the yarn joining nozzle 92, the yarn end of the first yarn is sucked into the untwisting chamber 105 and untwisted by the swirling air flow, and the yarn end of the second yarn is taken up in the untwisting chamber 106. It is sucked inside and untwisted by the swirling air flow.

  The yarn joining device 23 includes a cam (not shown). By rotating this cam, the above-described yarn shifting operation of the yarn shifting levers 95 and 96, the clamping operation of the clamp portions 97 and 98, the cutting operation of the cutters 99 and 100, and the pressing operation of the yarn pressing levers 103 and 104 are performed. Is called. In conjunction with the rotation of the cam, valves (not shown) for supplying compressed air to the yarn splicing nozzle 92 and the untwisting chambers 105 and 106 are also opened and closed.

  With the above configuration, the yarn joining device 23 performs the following yarn joining operation. That is, the first yarn entering the first slits 101 and 201 and the second yarn entering the second slits 102 and 202 rotate in the closing direction so as to be introduced into the yarn joining nozzle 92. It is brought close by the yarn shifting levers 95 and 96. In this state, the first yarn and the second yarn are clamped by the clamp portions 97 and 98. Thereafter, the cutter 99 cuts the first yarn, and the cutter 100 cuts the second yarn. The excess portion of the first yarn is sucked into the first catching and guiding device 27 and discarded. The excess second yarn is sucked into the second catching and guiding device 28 and discarded. The first yarn cut to a predetermined length is sucked into the untwisting chamber 105 and untwisted by the swirling air flow. The second yarn cut to a predetermined length is sucked into the untwisting chamber 106 and untwisted by the swirling air flow. Thereafter, the unwinding portion of the first yarn is pulled out from the untwisting chamber 105 and the untwisting portion of the second yarn is pulled out from the untwisting chamber 106 by further rotation of the yarn shifting levers 95 and 96 in the closing direction. It is. The untwisted portion of the first yarn and the untwisted portion of the second yarn are introduced into the twisting chamber 92 a of the yarn joining nozzle 92. In this state, the thread pressing levers 103 and 104 rotate in the closing direction, and the positions of the first thread and the second thread are determined by the thread pressing levers 103 and 104. Subsequently, the untwisted portions are twisted together by the swirling air flow generated in the twisting chamber 92a, so that the first yarn and the second yarn are joined and become a continuous state. Thereafter, the yarn holding levers 103 and 104 rotate in the opening direction to release the spun yarn 10, and the yarn shifting levers 95 and 96 also rotate in the opening direction, so that the spun yarn 10 travels during normal winding. Return to the route.

  Next, the electrical configuration of the spinning unit 2 will be described with reference to FIG. In addition to the control unit 80, the yarn quality monitoring device 40, the storage motor 42, and the seam monitoring device 25, the spinning unit 2 includes a draft motor 111, a spinning valve 112, a delivery motor 113, a catching guide motor 114, A yarn joining cam motor 115, a winding drum motor 116, and a winding brake valve 117 are provided.

  The draft motor 111 is, for example, a plurality of electric motors, and can drive the back roller 16, the third roller 17, the middle roller 19, and the front roller 20 of the draft device 7 at predetermined speeds.

  The spinning valve 112 is configured as an electromagnetic valve arranged in a path for supplying compressed air from a suitable compressed air source to the spinning device 9. The spinning valve 112 can switch whether or not to generate a swirling air flow for twisting and spinning the fiber bundle 8 in the spinning device 9.

  The delivery motor 113 is an electric motor that can drive the delivery roller 21 at a predetermined speed.

  The capture guide motor 114 is an electric motor that can rotate the first capture guide device 27 and the second capture guide device 28 up and down and can rotate forward and backward.

  The yarn joining cam motor 115 is an electric motor that can rotationally drive a cam (not shown) included in the yarn joining device 23. As described above, the cam operates the yarn shifting levers 95 and 96, the yarn pressing levers 103 and 104, the clamp portions 97 and 98, the cutters 99 and 100, and the like of the yarn joining device 23. The yarn splicing cam motor 115 is configured as a motor that can be rotated not only in the normal direction but also in the reverse direction. Therefore, in a predetermined case, the yarn splicing device 23 can be operated reversely to the normal operation.

  The winding drum motor 116 is an electric motor that can rotationally drive the winding drum 53. The take-up drum motor 116 can rotate the take-up drum 53 forward and backward.

  The winding brake valve 117 is an electromagnetic valve arranged in a path for supplying compressed air to an appropriate actuator (for example, a pneumatic cylinder) for operating the brake mechanism of the winding device 26. The take-up brake valve 117 is configured to be able to switch braking / release of the package 50 in the take-up device 26.

  The control unit 80 controls each unit of the spinning unit 2 as described above. Specifically, the draft motor 111, the delivery motor 113, the storage motor 42, the catching guide motor 114, the yarn splicing cam motor 115, and the winding drum motor 116 are electrically connected to the control unit 80, respectively. The rotation / stop of each motor or the rotation speed can be controlled. The spinning valve 112 and the take-up brake valve 117 are also electrically connected to the control unit 80, and the control unit 80 can control the opening and closing of the valves. Furthermore, the yarn quality monitoring device 40 and the seam monitoring device 25 are electrically connected to the control unit 80, and can output the monitoring results regarding the yarn quality and the quality of the seam to the control unit 80.

  Next, the operation of the spinning unit 2 at the time of yarn splicing will be described with reference to FIGS.

  If two typical cases in which the spun yarn 10 is divided are given, one is a case where a yarn breakage occurs during the winding of the spun yarn 10 around the package 50. The other is a case where the spun yarn 10 is cut at the spinning device 9 as a result of the spinning in the spinning device 9 being stopped because the yarn quality monitoring device 40 has detected a yarn defect. Even when the seam monitoring device 25 detects a seam failure, the spun yarn 10 is cut and separated, and then the splicing is performed again. However, since the operation of the spinning unit 2 in this case is different from the normal yarn splicing, this will be described later.

  For example, when the yarn quality monitoring device 40 detects a yarn defect, the control unit 80 controls to close the spinning valve 112 and stop the winding drum motor 116 and the draft motor 111. As a result, the spinning device 9 stops spinning, the winding device 26 stops winding the package 50, and the draft device 7 stops drafting the fiber bundle 8. Further, when the control unit 80 controls an actuator (not shown), the first guide 61 moves from the state shown in FIG. 1 to a position away from the yarn accumulating device 22 (see FIG. 5).

  Further, the control unit 80 rotates the capture guide motor 114 to rotate the second capture guide device 28 upward from the state shown in FIG. Thereby, as shown in FIG. 5, since the tip of the second catching and guiding device 28 is close to the outer peripheral surface of the package 50, the second catching and guiding device 28 can suck and catch the second yarn. Thereafter, the control unit 80 controls the take-up drum motor 116 to rotate reversely, thereby rotating the package 50 reversely by a predetermined amount and further driving the capture guide motor 114. As a result, the second catching and guiding device 28 guides the second yarn to a position where the yarn joining device 23 can perform the yarn joining as shown in FIG. As a result, the second yarn is introduced into the second slits 102 and 202 formed in the guide plates 93 and 94 of the yarn joining device 23, respectively.

  Before and after this, the control unit 80 controls the draft motor 111 and the spinning valve 112 to resume drafting the fiber bundle 8 by the draft device 7 and spinning by the spinning device 9. Before that, the control unit 80 rotates the capture guide motor 114 to rotate the first capture guide device 27 downward from the state shown in FIG. Thereby, as shown in FIG. 5, the first catching and guiding device 27 can suck and catch the first yarn generated by the spinning device 9. The control unit 80 further rotates the catching guide motor 114, and the first catching and guiding device 27 guides the first yarn to a position where the yarn joining device 23 can perform the yarn joining as shown in FIG. As a result, the first yarn is introduced into the first slits 101 and 201 formed in the guide plates 93 and 94 of the yarn joining device 23, respectively.

  As described above, as shown in FIG. 6, the first yarn and the second yarn can be guided to the yarn joining device 23.

  After the first catching and guiding device 27 and the second catching and guiding device 28 guide the first yarn and the second yarn to the yarn joining device 23, the control unit 80 brings the first guide 61 closer to the yarn accumulating device 22. (See FIG. 7). Thereby, since the spun yarn 10 is guided to the vicinity of the yarn accumulating device 22, the yarn hooking member 43 of the yarn accumulating device 22 can hook the spun yarn 10. As a result, the spun yarn 10 starts to be stored in the yarn storage roller 41.

  At substantially the same time, the controller 80 rotates the yarn splicing cam motor 115. Thereby, the yarn joining device 23 performs the yarn joining operation as described above, and joins the first yarn and the second yarn.

  When the piecing is completed, the control unit 80 starts to rotate the winding drum motor 116. As a result, the winding drum 53 or the like that has been stopped is driven again to return to the state shown in FIG. 1, and the winding of the package 50 can be resumed.

  Next, a description will be given of a control for monitoring (inspecting) the formed seam after the yarn joining is performed in the yarn joining device 23 of the spinning unit 2 and removing it if it is defective.

  After the splicing of the spun yarn 10 is performed by the yarn splicing device 23, the control unit 80 controls the winding drum motor 116 to rotate the package 50 that has been stopped in the winding device 26. However, until the joint is inspected by the joint monitoring device 25, the control unit 80 controls the winding drum motor 116 so that the acceleration of the rotation of the package 50 becomes smaller than usual.

  As the spun yarn 10 is wound around the winding device 26, the seam formed by the yarn splicing of the yarn splicing device 23 passes through the seam monitoring device 25. The joint monitoring device 25 inspects the joint and determines whether it is acceptable. When the seam monitoring device 25 determines that the seam is good, the control unit 80 controls the winding drum motor 116 to increase the rotational speed of the package 50 at a normal (large) acceleration, and monitors the yarn quality. Winding is performed while the spun yarn 10 is monitored by the device 40.

  When the joint monitoring device 25 determines that the seam is defective, the control unit 80 controls the take-up drum motor 116 and the take-up brake valve 117 so as to immediately stop the rotation of the package 50. As described above, since the acceleration of the rotation of the package 50 is slightly moderate at the beginning, the rotation speed of the package 50 at the time when the seam monitoring device 25 determines the quality of the seam is not so high. Therefore, the brake mechanism may immediately brake the rotation of the package 50, and the time from when the defective joint is detected until the package 50 stops rotating can be shortened.

  When a joint failure is detected by the joint monitoring device 25, the control unit 80 controls the spinning valve 112 and stops the supply of compressed air to the spinning device 9. As a result, the spun yarn 10 is cut by the spinning device 9. Further, the control unit 80 stops the draft motor 111, the delivery motor 113, and the like.

  Next, the control unit 80 controls the yarn joining cam motor 115 to rotate the cam of the yarn joining device 23 by a predetermined angle, so that a part of the yarn joining operation (that is, the yarn gathering operation of the yarn gathering levers 95 and 96, clamping) Clamping operation by the portions 97 and 98 and cutting operation of the cutters 99 and 100). As a result, the spun yarn 10 (in a continuous state) on the travel path during normal winding is moved to the yarn joining device 23 by the yarn shifting levers 95 and 96. Although details will be described later, when the spun yarn 10 in a continuous state is brought close to the yarn joining nozzle 92 (twisting chamber 92a) by the yarn moving levers 95 and 96, the spun yarn 10 is moved to the first slit 101. , 201 and the second slits 102 and 202, the guide plate 94 and the yarn moving lever 95 have a predetermined shape. Accordingly, the spun yarn 10 in a continuous state is inserted into the second slits 102 and 202 by the yarn shifting levers 95 and 96, clamped by the clamp portion 98, and cut by the cutter 100.

  As a result, the second yarn is clamped by the clamp portion 98, and the first yarn falls off from the yarn joining device 23. Since the first yarn is discarded as described later, it is not necessary to clamp it.

  The control unit 80 controls the storage motor 42 to rotate reversely while maintaining the state where the yarn joining device 23 clamps the second yarn. As a result, the yarn accumulating roller 41 of the yarn accumulating device 22 rotates in reverse, so that the spun yarn 10 (first yarn) stored in the yarn accumulating roller 41 is unwound and sucked into a suction unit (not shown) and discarded. Is done.

  The controller 80 drives the capture guide motor 114 from the state shown in FIG. 8 to once rotate the second capture guide device 28 upward. However, in this case, the control unit 80 is a solid line in FIG. 9 in which the second catching and guiding device 28 is positioned in the vicinity of the clamp unit 98 of the yarn joining device 23 in the middle of the upward rotation stroke. Control to stop once at the position. In this state, the control unit 80 reversely rotates the yarn joining cam motor 115, releases the clamp of the second yarn by the clamp unit 98, and rotates the yarn shifting levers 95 and 96 in the opening direction. As a result, the second yarn is captured by the second capture guide device 28.

  Thus, in the present embodiment, the yarn end of the second yarn is clamped by the clamp portion 98 until it is caught by the second catching and guiding device 28. Accordingly, for example, the position of the yarn end is stabilized as compared with the case where the yarn end of the second yarn is wound around the package 50, so that the catching error by the second catching and guiding device 28 can be reduced extremely well.

  After releasing the clamp at the clamp unit 98, the control unit 80 controls the winding drum motor 116 to rotate in reverse, thereby rotating the package 50 in reverse by a predetermined amount. At this time, the amount of reverse rotation of the package 50 is an amount by which the seam determined to be defective by the seam monitoring device 25 is pulled out from the package 50 by a sufficient distance.

  Thereafter, the control unit 80 drives the capture guide motor 114 to rotate the second capture guide device 28 downward. Thereby, the second catching and guiding device 28 guides the second yarn to a position where the yarn joining device 23 can perform the yarn joining. As a result, the second yarn is introduced into the second slits 102 and 202 formed in the guide plates 93 and 94 of the yarn joining device 23, respectively.

  Around this time, the control unit 80 restarts the drafting of the fiber bundle 8 by the drafting device 7 and the spinning by the spinning device 9. Before this, the controller 80 rotates the first catching and guiding device 27 downward from the state shown in FIG. Thereby, the first catching guide device 27 can catch the first yarn generated by the spinning device 9. As a result, the first yarn is introduced into the first slits 101 and 201 formed in the guide plates 93 and 94 of the yarn joining device 23, respectively.

  As a result of the above operation, the state becomes similar to the state of FIG. This yarn splicing operation is the same as that at the time of detecting the yarn defect of the yarn quality monitoring device 40 described above, and the description thereof will be omitted. When the yarn splicing is completed, the state returns to the state of FIG. 1, and the control unit 80 controls the winding drum motor 116 to rotate the package 50 that has been stopped in the winding device 26. The newly formed seam is inspected by the seam monitoring device 25 in the same manner as the previous seam.

  As described above, in the spinning unit 2 in the spinning machine of the present embodiment, when the joint monitoring device 25 detects a defect in the joint, the spun yarn 10 is not cut with the specially provided cutter, but the yarn joining device 23. The spun yarn 10 is cut by a cutter 100 for cutting excess yarn at the time of yarn joining. Therefore, since it is not necessary to add a cutter to the spinning unit 2, a simple configuration can be realized and the cost can be reduced. Further, before the spun yarn 10 is cut by the cutter 100 of the yarn splicing device 23, the portion of the spun yarn 10 on the downstream side (position close to the package 50) is clamped by the clamp unit 98. Therefore, the second yarn is clamped by the clamp unit 98 from the time of the yarn cutting, and the second catching and guiding device 28 catches the second yarn in a form in which the second yarn is delivered from the clamp unit 98. Accordingly, since the second yarn does not move irregularly due to the cutting of the spun yarn 10, the second catching and guiding device 28 can catch the second yarn smoothly and efficiently remove the defective seam. .

  Next, a configuration for smoothly inserting the spun yarn 10 in the continuous state into the second slits 102 and 202 in order to cut the spun yarn 10 with the cutter 100 when a joint failure is found will be described.

  As described above, when a seam failure is detected by the seam monitoring device 25, the spun yarn 10 is cut by the yarn splicing device 23 in a state where the spun yarn 10 portion on the downstream side from the cut portion is clamped. Therefore, the spun yarn 10 in a continuous state needs to be put in the second slits 102 and 202. If the spun yarn 10 enters the first slits 101 and 201, the spun yarn 10 is cut by the cutter 99, and the first yarn on the upstream side (position close to the yarn supplying portion 5) from the cut portion is clamped 97. It will be clamped by. In this case, since the second yarn is not clamped, it is not possible to prevent the spun yarn 10 from being violated due to the cutting momentum. In other words, the second yarn cannot be caught smoothly by the second catching and guiding device 28.

  It is also conceivable that the spun yarn 10 enters the first slit 101 of the guide plate 93 and enters the second slit 202 of the guide plate 94. In this case, the spun yarn 10 cannot be cut with the cutters 99 and 100.

  It is also conceivable that the spun yarn 10 enters the second slit 102 of the guide plate 93 and enters the first slit 201 of the guide plate 94. In this case, the spun yarn 10 is cut by the cutters 99 and 100 at two locations, and the spun yarn 10 between the cut locations remains in the yarn splicing nozzle 92 and interferes with the splicing.

  In the yarn splicing device 23 of the present embodiment, the downstream guide plate 94 and the upstream side are provided in order to reliably put the spun yarn 10 in the continuous state into the second slits 102 and 202 of both the two guide plates 93 and 94. The shape of the yarn shifting lever 95 is configured as follows.

  Hereinafter, this will be described in detail with reference to FIG. A protrusion 93 a is formed between the two slits 101 and 102 of the guide plate 93. A protrusion 94 a is formed between the two slits 201 and 202 of the guide plate 94. A guide surface 93b that guides the spun yarn 10 to the first slit 101 and a guide surface 93c that guides the spun yarn 10 to the second slit 102 are formed on the protrusion 93a. The two guide surfaces 93b and 93c are both formed in a tapered shape, and are smoothly continuous with the inner walls of the slits 101 and 102. The protruding length of the protruding portion 94a is longer than the protruding length of the protruding portion 93a. Only a guide surface (first cutting guide portion) 94c for guiding the spun yarn 10 to the second slit 202 is formed on the protruding portion 94a. The guide surface 94 c is formed in a taper shape and smoothly continues to the inner wall of the second slit 202.

  The yarn gathering levers 95 and 96 are both configured to be bent to one side. A yarn guide portion 95 a that contacts and guides the spun yarn 10 is formed on the inner peripheral side of the yarn gathering lever 95. A yarn guide portion 96 a that contacts and guides the spun yarn 10 is formed on the inner peripheral side of the yarn gathering lever 96. The yarn gathering lever 95 is formed longer than the yarn gathering lever 96. A V-shaped bent portion (second cutting guide portion) 95b is formed in the yarn guide portion 95a.

  The operation of the above configuration will be described. When the yarn gathering levers 95 and 96 are rotated in the closing direction from the state of FIG. 3, the upstream yarn gathering lever 95 comes into contact with the spun yarn 10 in the continuous state first. In the process of approaching the guide plates 93 and 94 while the upstream yarn gathering lever 95 is in contact with the spun yarn 10, the spun yarn 10 under tension naturally moves to the bent portion 95b. The bent portion 95b is disposed at a position substantially corresponding to the second slit 202 immediately before the yarn shifting levers 95 and 96 enter between the guide plate 93 and the guide plate 94. Accordingly, the spun yarn 10 that has moved to the bent portion 95 b is smoothly put into the second slit 202.

  The spun yarn 10 brought together by the yarn gathering levers 95 and 96 first comes into contact with the protruding portion 94a on the downstream side. The spun yarn 10 is guided to the second slit 102 by the guide surface 94c of the protrusion 94a.

  Since the guide plate 94 and the yarn gathering lever 95 provided in the yarn joining device 23 have the above-described shape characteristics, when the yarn gathering levers 95 and 96 draw the continuous spun yarn 10, the spun yarn 10 is guided to enter the second slits 102 and 202 formed in the guide plates 93 and 94, respectively. Therefore, the spun yarn 10 can be reliably cut with the cutter 100 while being clamped with the clamp portion 98.

  As described above, the spinning unit 2 included in the spinning machine of the present embodiment includes the yarn feeding unit 5, the winding device 26, the yarn joining device 23, and the seam monitoring device 25. The yarn supplying unit 5 supplies the spun yarn 10. The winding device 26 winds the spun yarn 10 around the package 50. The yarn splicing device 23 has a cutter 100. The seam monitoring device 25 monitors the spun yarn 10. The spinning machine (spinning unit 2) cuts the spun yarn 10 in a continuous state by the cutter 100 of the yarn joining device 23 based on the monitoring result of the joint monitoring device 25.

  Thereby, the spun yarn 10 can be cut by the cutter 100 of the yarn splicing device 23 without specially providing a cutter. Therefore, the spun yarn 10 can be cut with a simple configuration based on the monitoring result of the joint monitoring device 25.

  In the spinning machine of this embodiment, the seam monitoring device 25 is disposed downstream of the yarn joining device 23. The spinning machine cuts the spun yarn 10 with the cutter 100 based on the monitoring result of the spliced yarn 10 by the seam monitoring device 25.

  Thereby, the joint of the spun yarn 10 formed by the yarn joining device 23 can be sent to the downstream side by winding by the winding device 26, and the quality of the joint can be immediately judged by the joint monitoring device 25. Therefore, when the formed seam is good, the winding can be continued as it is. Even if the seam is defective, the seam failure can be detected at the initial stage of acceleration of the winding speed of the winding device 26, so that the winding can be stopped in a short time, and when the yarn joint is performed again, Yarn splicing can be performed efficiently.

  In the spinning machine of the present embodiment, when the seam monitoring device 25 detects that the spun yarn 10 has a defective seam, the winding device 26 stops winding and then the spun yarn 10 is cut by the cutter 100. To do.

  This prevents the cut yarn end from being wound around the rotating package 50 (by inertia) in the winding device 26. Accordingly, when the yarn splicing is performed again, the yarn end can be reliably captured.

  In the spinning machine of the present embodiment, the yarn splicing device 23 has a clamp portion 98 that holds the spun yarn 10. The cut of the spun yarn 10 performed by the cutter 100 based on the monitoring result of the joint monitoring device 25 is performed in a state where the spun yarn 10 is held by the clamp unit 98.

  Thereby, it is possible to prevent the yarn end formed by cutting the spun yarn 10 from being violated due to a sudden release of the tension of the spun yarn 10 and / or twisting / shrinking of the spun yarn 10 or the like.

  In the spinning machine of the present embodiment, the location where the clamp unit 98 of the yarn splicing device 23 holds the spun yarn 10 is downstream from the cut location of the spun yarn 10 by the cutter 100.

  Accordingly, the second yarn that is the yarn end on the downstream side (package 50 side) among the yarn ends formed by cutting the spun yarn 10 can be held by the clamp portion 98. Accordingly, it is possible to prevent the yarn end of the second yarn connected to the package 50 from being violated, so that when the splicing is performed again, the splicing can be performed efficiently.

  The spinning machine of this embodiment includes a second catching and guiding device 28 that catches the spun yarn 10 from the package 50. The clamp unit 98 releases the holding of the spun yarn 10 after the second catching and guiding device 28 has moved to a position where the spun yarn 10 held by the clamp unit 98 can be caught.

  As a result, the yarn end (second yarn) from the package 50 is held by the clamp portion 98 so as not to move and is transferred to the second catching and guiding device 28, so that the second catching and guiding device 28 is moved to the spun yarn 10. Can be captured very easily. Therefore, the operation of capturing the spun yarn 10 can be performed smoothly, and the efficiency of the yarn splicing operation can be further improved.

  In the spinning machine of this embodiment, the yarn splicing device 23 includes guide plates 93 and 94 and yarn shifting levers 95 and 96. Each of the guide plates 93 and 94 has first slits 101 and 201 into which the yarn end of the first yarn from the yarn supplying section 5 is introduced at the time of yarn joining, and the yarn end of the second yarn from the package 50 at the time of yarn joining. The second slits 102 and 202 into which are introduced are formed. At the time of yarn joining, the yarn shifting levers 95 and 96 move the yarn end of the first yarn toward the back side of the first slits 101 and 201 and bring the yarn end of the second yarn close to the back side of the second slits 102 and 202. Performs thread shifting operation. The guide plate 94 on the downstream side guides the spun yarn 10 to the second slit 202 when the yarn shifting levers 95 and 96 perform the yarn shifting operation to cut the continuous spun yarn 10. Is provided.

  Thereby, the spun yarn 10 in a continuous state is surely put into the second slit 202 which is a slit for cutting by the guide surface 94c of the guide plate 94. As a result, the spun yarn 10 can be reliably cut by the cutter 100 of the yarn joining device 23.

  In the spinning machine of the present embodiment, the upstream yarn shifting lever 95 moves the spinning yarn 10 when the yarn shifting lever 95 (96) performs the yarn shifting operation to cut the continuous spinning yarn 10. A bent portion 95b for guiding to the second slit 102 is provided.

  Thereby, the spun yarn 10 in a continuous state is reliably put into the second slit 102 which is a slit for cutting by the bent portion 95b of the yarn moving lever 95. As a result, the spun yarn 10 can be reliably cut by the cutter 100 of the yarn joining device 23.

  The spinning machine of this embodiment includes a control unit 80. The control unit 80 controls the yarn joining device 23 to cut the continuous spun yarn 10 based on the monitoring result of the joint monitoring device 25.

  Accordingly, the spun yarn 10 can be automatically cut by the cutter 100 of the yarn joining device 23 based on the monitoring result of the joint monitoring device 25.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  Instead of the configuration in which the yarn splicing device 23 and the seam monitoring device 25 are provided for each spinning unit 2, a work carriage movable with respect to the plurality of spinning units 2 is provided, and the work cart monitors the yarn splicing work and the seams. The structure to perform may be sufficient.

  When the first catching and guiding device 27 catches the first yarn and when the second catching and guiding device 28 catches the second yarn, catching assistance may be performed by an appropriate assisting device. For example, the yarn end may be sprayed toward the tip of the first catching and guiding device 27 and / or the tip of the second catching and guiding device 28 by jetting compressed air from an appropriate place. In this case, the success rate of capturing the first yarn and the second yarn can be improved. Further, a yarn guide or the like for regulating the position of the spun yarn 10 may be further provided. In this case, it is possible to stably transfer the yarn end sent on the blown air flow to the first catching and guiding device 27 and / or the second catching and guiding device 28.

  Rotation that detects how many times the package monitoring device 25 has rotated after the seam monitoring device 25 detects a failure of the joint until the package 50 stops, and rotates the package 50 in reverse before the yarn joining operation based on the detection result. The amount may be controlled. That is, the amount of rotation of the package 50 before the rotation stops depends on the amount of the spun yarn 10 wound around the package 50 when the joint failure is detected and the rotational speed of the package 50 at that time. . Therefore, the control unit 80 obtains the rotation amount until the package 50 stops by an appropriate rotation detection unit provided in the winding device 26, and based on the obtained rotation amount, the reverse rotation amount of the package 50 is determined. You may make it control. In addition, as said rotation detection part, the rotation sensor of the structure which generate | occur | produces a pulse signal, for example whenever a package 50 rotates a predetermined angle is employable. As a result, the package 50 can be reversely rotated by a minimum amount of rotation that can be pulled out and removed according to the situation. As a result, the package 50 is not unnecessarily reversely rotated, so that the spun yarn 10 can be wasted and the work efficiency can be improved.

  In the above embodiment, the seam monitoring device 25 that monitors the joint of the spun yarn 10 is provided separately from the yarn quality monitoring device 40 that monitors the quality of the spun yarn 10. However, a single yarn monitoring device may be configured to monitor both the joint of the spun yarn 10 and the quality of the spun yarn 10.

  The configuration for guiding the spun yarn 10 in the continuous state to the second slits 102 and 202 is not limited to the guide surface 94c and the bent portion 95b described above. For example, a large guide surface 94 c for guiding the spun yarn 10 to the second slits 102 and 202 may be provided on the upstream guide plate 93. Further, the downstream yarn gathering lever 96 may be provided with a bent portion similar to that of the upstream yarn gathering lever 95.

  The spun yarn 10 in a continuous state may be introduced into the first slits 101 and 201 instead of the second slits 102 and 202, and the spun yarn 10 may be cut by the cutter 99. In this case, the second yarn cannot be held, but the first yarn can be held by the clamp portion 97.

  In the above-described embodiment, after the spun yarn 10 is cut by the cutter 100 of the yarn joining device 23 by detecting the defective seam and the second yarn is held by the clamp unit 98, the second catching and guiding device 28 is indicated by a solid line in FIG. It is controlled so as to be stopped at the position shown and to release the clamp of the clamp portion 98 in this state. However, if the second yarn can be reliably caught by the second catching and guiding device 28, it is not always necessary to stop the second yarn.

  In the embodiment described above, the winding drum motor 116 that drives the winding drum 53 of the winding device 26 is provided for each spinning unit 2. However, instead of this, the take-up drum 53 may be driven by a common drive shaft in the plurality of spinning units 2. In this case, in order to enable the package 50 to be rotated at a lower acceleration than usual or to rotate the package 50 immediately after the completion of the yarn splicing as described above, a package driving mechanism different from the winding drum 53 is used. It is preferable to provide.

  The spinning machine of the above embodiment has a layout in which the package 50 is disposed above the spinning unit 2. However, the present invention is not limited to this, and the present invention can also be applied to a spinning machine in which the package 50 is disposed below the spinning unit 2 (for example, one disclosed in JP 2010-77576 A). The present invention can also be applied to an automatic winder that winds a yarn unwound from a yarn feeding bobbin to form a package. In this case, a bobbin setting portion capable of setting a yarn feeding bobbin serves as a yarn feeding It corresponds to the part.

2 Spinning unit of spinning machine (yarn winding unit of yarn winding machine)
5 Yarn supply section 10 Spinned yarn (yarn)
23 Yarn splicing device 25 Seam monitoring device (yarn monitoring device)
26 Winding device 28 Second catching guide device (yarn catching portion)
80 Control section 93 Guide plate (guide member)
94 Guide plate (guide member)
94c Guide surface (first cutting guide)
95 Yarn-feeding lever 95b Bent part (second cutting guide part)
96 Yarn-feeding lever 98 Clamp part (holding part)
100 Cutter 101, 201 First slit 102, 202 Second slit

Claims (10)

A yarn supplying section for supplying yarn;
A winding device for winding the yarn around a package;
A yarn splicing device having a cutter;
A yarn monitoring device for monitoring the yarn;
With
A yarn winding machine, wherein the yarn in a continuous state is cut by the cutter of the yarn joining device based on a monitoring result of the yarn monitoring device. The yarn winding machine according to claim 1,
The yarn monitoring device is disposed on the downstream side of the yarn joining device,
A yarn winding machine, wherein the yarn is cut by the cutter based on a monitoring result of the yarn seam by the yarn monitoring device. The yarn winding machine according to claim 1 or 2,
When the yarn monitoring device detects that the yarn seam is defective, the yarn winding machine cuts the yarn by the cutter after stopping the winding of the winding device. A yarn winding machine according to claim 3,
The yarn joining device has a holding portion for holding the yarn,
The yarn winding machine, wherein the cutting of the yarn performed by the cutter based on a monitoring result of the yarn monitoring device is performed in a state where the holding unit holds the yarn. The yarn winding machine according to claim 4,
The yarn winding machine characterized in that the holding portion holds the yarn at a downstream side of the yarn cutting portion by the cutter. A yarn winding machine according to claim 5,
A yarn catcher for catching the yarn from the package;
The yarn winding machine, wherein the holding unit releases the holding of the yarn after the yarn catching unit has moved to a position where the yarn held in the holding unit can be caught. A yarn winding machine according to any one of claims 3 to 6,
The yarn joining device is
A guide member;
A thread gathering lever;
With
In the guide member,
A first slit into which a first yarn end that is a yarn end of the yarn from the yarn supplying section is introduced at the time of yarn joining;
A second slit into which a second yarn end that is a yarn end of the yarn from the package is introduced at the time of yarn joining;
Formed,
At the time of yarn joining, the yarn shifting lever performs a yarn shifting operation to move the first yarn end to the back side of the first slit and move the second yarn end to the back side of the second slit,
The guide member guides the yarn to one of the first slit and the second slit when performing the yarn gathering operation by the yarn gathering lever to cut the yarn in a continuous state. A yarn winding machine comprising a guide portion. A yarn winding machine according to any one of claims 3 to 7,
The yarn joining device is
A guide member;
A thread gathering lever;
With
In the guide member,
A first slit into which a first yarn end that is a yarn end of the yarn from the yarn supplying section is introduced at the time of yarn joining;
A second slit into which a second yarn end that is a yarn end of the yarn from the package is introduced at the time of yarn joining;
Formed,
At the time of yarn joining, the yarn shifting lever performs a yarn shifting operation to move the first yarn end toward the back side of the first slit and move the second yarn end toward the back side of the second slit,
The yarn gathering lever guides the yarn to one of the first slit and the second slit when performing the yarn gathering operation by the yarn gathering lever to cut the continuous yarn. A yarn winding machine comprising a cutting guide. A yarn winding machine according to any one of claims 1 to 8,
With a control unit,
The control unit controls the yarn joining device to cut the continuous yarn based on a monitoring result of the yarn monitoring device. A yarn supplying section for supplying yarn;
A winding device for winding the yarn around a package;
A yarn joining device capable of joining the yarn;
A yarn monitoring device for monitoring the yarn;
A yarn winding method in a yarn winding machine having:
A yarn winding method comprising cutting the continuous yarn by the yarn joining device based on a monitoring result of the yarn monitoring device.

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