Yarn winding machine

Abstract

To provide a yarn winding machine capable of optimizing tensile force generated on a yarn when the yarn is guided to a yarn piecing section in a yarn piecing operation by a yarn piecing device.SOLUTION: A yarn winding machine 1 comprises: a plurality of winding units 2 that respectively have a suctioning / catching device 50 to suction and catch a yarn Y on a package P side when the yarn is divided between an air spinning device 7 and a winding device 13; and a yarn piecing device 35 having a yarn drawing member 39A to execute yarn drawing operation. Each of the suctioning / catching devices 50 has a suction piping 61A in which suction air flows from a tip 61Ab toward a base end 61Aa, a suction port 51 formed on the tip 61Ab of the suction piping 61A, and a holding part 70 to hold the yarn Y suctioned from the suction port 51 in the suction piping 61A. When the yarn Y is divided, the holding part 70 holds the yarn Y on the package P side suctioned in the suction piping 61A. The holding part releases the yarn Y simultaneously with or before starting of the yarn drawing operation by the yarn piecing device 35.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] One aspect of the present invention relates to a yarn winding machine. [Background technology]

[0002] For example, Patent Document 1 discloses a spinning machine equipped with a suction capture device (fixed capture device) that can capture the yarn on the package side when the yarn is broken between the spinning device and the winding device. The fixed capture device has a suction pipe with a suction port connected to a blower, and captures the yarn by sucking the yarn through the suction port with suction airflow generated in the suction pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-130239 Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the conventional fixed capture device captures the yarn by continuously sucking it, the operation of the blower cannot be stopped, and tension is constantly generated in the yarn sucked through the suction port. If the yarn splicing device guides such a yarn to the yarn splicing section in a hooked state during the yarn splicing operation, further tension is generated in the yarn, which may result in yarn breakage.

[0005] Therefore, an object of one aspect of the present invention is to provide a yarn winding machine that can optimize the tension generated in the yarn when the yarn is guided to the yarn joining section during the yarn joining operation by the yarn joining device. [Means for solving the problem]

[0006] A yarn winding machine according to one aspect of the present invention includes a plurality of winding units each having an air spinning device that generates yarn by twisting a fiber bundle with a swirling air flow, a winding device that winds the yarn supplied from the air spinning device to form a package, and a suction and capturing device that is disposed between the air spinning device and the winding device and that sucks and captures the yarn on the package side when the yarn is broken between the air spinning device and the winding device; a yarn splicing device having a yarn pulling member that performs a yarn pulling operation to guide the yarn to a yarn splicing section that splices the broken yarn; and Each suction capture device is provided with a suction duct connected thereto and a blower that generates a flow of suction air in the suction duct. Each suction capture device has a suction pipe that extends from a base end that is a connection point with the suction duct to a tip end, and through which suction air flows from the tip end to the base end, a suction port formed at the tip end of the suction pipe, and a holding part that holds at least a part of the yarn sucked from the suction port within the suction pipe. After the yarn breaks, the holding part holds the yarn sucked into the suction pipe, and releases its hold on the yarn simultaneously with or before the yarn joining device starts its yarn pulling operation.

[0007] In a yarn winding machine with this configuration, the yarn sucked through the suction port is held by the holding section within the suction pipe, thereby stabilizing the state of the yarn from the suction port to the holding section. Furthermore, in a yarn winding machine with this configuration, if the yarn joining device performs a yarn shifting operation while the yarn is still held by the holding section, the tension in the yarn may increase, potentially resulting in yarn breakage. However, the yarn joining device releases the hold on the yarn simultaneously with or before the start of the yarn shifting operation. This optimizes the tension generated in the yarn when the yarn is guided to the yarn joining section during the yarn joining operation by the yarn joining device. As a result, the yarn joining device can perform stable yarn joining.

[0008] The yarn winding machine according to one aspect of the present invention may further include a traverse guide that moves the yarn to a central region in the width direction of the package before the yarn joining device performs a yarn shifting operation. This configuration can shorten the cycle time for yarn joining by the yarn joining device.

[0009] A yarn winding machine according to one aspect of the present invention includes a cutter disposed in the suction pipe between the holding section and the connection section, and configured to cut the yarn sucked through the suction port within the suction pipe, the cutter starting its cutting operation simultaneously with or after the holding section begins holding the yarn. With this configuration, the yarn located downstream of the holding section can be reliably cut by the cutter.

[0010] In the yarn winding machine according to one aspect of the present invention, the holding section may have a shutter function that blocks the flow of suction air in the suction pipe. With this configuration, the flow of suction air in the suction pipe can be blocked when the yarn is held and when the yarn does not need to be held, thereby reducing energy consumption in the blower.

[0011] In the yarn winding machine according to one aspect of the present invention, the holding section may be switched from a closed state in which the flow of suction air is blocked to an open state in which the flow of suction air is permitted in response to breaking of the yarn. This configuration makes it possible to reliably capture the broken yarn while achieving energy savings.

[0012] In a yarn winding machine according to one aspect of the present invention, each of the plurality of winding units may include a yarn storage device that stores the yarn between the air spinning device and the winding device, and the holding section may be switched to an open state before the yarn stored in the yarn storage device runs out. With this configuration, the yarn whose behavior is controlled is sucked through the suction port, so that the holding section can reliably hold the yarn.

[0013] In the yarn winding machine according to one aspect of the present invention, the holding section may be switched to a closed state after starting winding of the package. With this configuration, when there is no need to capture the yarn with the suction capturing device, the flow of suction air can be blocked, thereby reducing energy consumption in the blower.

[0014] A yarn winding machine according to one aspect of the present invention may include a cleaning device that moves along the arrangement direction of the plurality of winding units while spraying air. In this configuration, the holding section holds the yarn inside the suction pipe, so that the behavior of the yarn does not become unstable even when the cleaning device sprays air. This allows the yarn winding machine to be kept cleaned by the cleaning device, and the yarn splicing operation can be performed reliably.

[0015] In the yarn winding machine according to one aspect of the present invention, preparation of the yarn on the air spinning device side may start after preparation of the yarn on the package side is completed. With this configuration, the yarn splicing operation can be performed efficiently.

[0016] In a yarn winding machine according to one aspect of the present invention, when the air spinning device starts preparing the yarn, the yarn splicing cart may start moving toward the winding unit that is the target of the yarn splicing operation. This configuration allows the yarn splicing cart, which is shared by the multiple winding units, to be used efficiently. [Effects of the Invention]

[0017] According to one aspect of the present invention, it is possible to optimize the tension generated in the yarn when the yarn is guided to the yarn joining section during the yarn joining operation by the yarn joining device. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a front view of a spinning machine according to one embodiment. [Figure 2] FIG. 2 is a side view of a spinning unit included in the spinning machine of FIG. [Figure 3] 3 is a perspective view showing a guide portion included in the spinning unit of FIG. 2. FIG. [Figure 4] 4 is a perspective view showing a yarn pooling device included in the spinning unit of FIG. 2. FIG. [Figure 5]Fig. 5(A) is a cross-sectional view showing a holding section in a non-holding state and a non-blocking state in a suction and capture device included in the spinning unit of Fig. 2. Fig. 5(B) is a cross-sectional view showing a holding section in a holding state and a blockage state in a suction and capture device included in the spinning unit of Fig. 2. [Figure 6] 6 is a perspective view showing a yarn joining device included in the spinning unit of FIG. 2. FIG. [Figure 7] 7 is a cross-sectional view showing a yarn joining device included in the spinning unit of FIG. [Figure 8] Figure 8(A) is a perspective view of a suction and capture device according to a modified example, and Figure 8(B) is a perspective view of a suction and capture device according to a further modified example. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicate explanations will be omitted. "Upstream" and "downstream" refer to upstream and downstream in the running direction of the yarn Y during spinning, or upstream and downstream in the suction direction of the yarn Y in the suction and capture device. The dimensional ratios in the drawings do not necessarily match those in the description.

[0020] As shown in Fig. 1, the air spinning machine (yarn winding machine) 1 includes a main frame 2A, a first end frame 4, a second end frame 5, a yarn splicing carriage 3, and a doffing carriage (not shown). The first end frame 4, the main frame 2A, and the second end frame 5 are arranged in one direction. The main frame 2A mainly houses a plurality of spinning units (winding units) 2 that produce yarn Y and wind it into a package P, and a suction duct 41. The main frame 2A has a plurality of spinning units 2 arranged in one direction. The suction duct 41 is arranged along the direction in which the plurality of spinning units 2 are arranged.

[0021] The first end frame 4 is provided with a portion of the suction duct 41, a blower 43, a collection box 45, and the like. The first end frame 4 is disposed at one end in the arrangement direction of the plurality of spinning units 2. The blower 43 generates a suction airflow in the suction duct 41, which is disposed across the first end frame 4 and the main frame 2A. The blower 43 is driven by a blower motor (not shown). The blower 43 is connected to the suction duct 41 via the collection box 45. The collection box 45 collects waste yarn and the like generated in each spinning unit 2 using a filter (not shown) via the suction airflow flowing through the suction duct 41. The suction airflow flows from the waste yarn suction port 20B, the residual yarn suction port 11F, and the suction capture port (suction port) 51 of the suction capture device 50, which are provided in each spinning unit 2 and will be described in detail later, via the suction duct 41 to the collection box 45.

[0022] The second end frame 5 houses an air pressure adjusting unit for adjusting the pressure of compressed air supplied from an air pressure supplying device (not shown) located in the textile factory where the air spinning machine 1 is installed and supplying air to each part of the air spinning machine 1, as well as a drive motor for supplying power to each part of the spinning unit 2.

[0023] The second end frame 5 is provided with a machine controller 15 and an input device 18. The machine controller 15 centrally manages and controls each part of the air spinning machine 1. The machine controller 15 has an input / output interface for inputting and outputting signals to and from the outside, a storage unit such as a ROM (Read Only Memory) that stores programs and information for processing, a RAM (Random Access Memory) that temporarily stores data, a CPU (Central Processing Unit), and a communication circuit. Based on signals output by the CPU, the machine controller 15 stores input data in the RAM, loads programs stored in the ROM into the RAM, and executes the programs loaded into the RAM to perform various processes.

[0024] The input device 18 has a display screen 16 and input keys 17. The display screen 16 can display information about at least one of the settings and the status of the spinning unit 2. The operator can perform setting work for the spinning unit 2 by performing appropriate operations using the input keys 17. If the display screen 16 is configured as a touch panel display, the display screen 16 and the input keys 17 are configured integrally. The input device 18 can set spinning conditions for the air spinning device 7 via the display screen 16 or the input keys 17. The spinning conditions include the type of yarn, the thickness of the yarn Y, the spinning speed, etc. The machine controller 15 controls each part of the air spinning machine 1 based on these spinning conditions.

[0025] As shown in FIGS. 1 and 2 , each spinning unit 2 includes, in order from the upstream side in the running direction of the yarn Y, a draft device 6, an air spinning device 7, a guide unit 20, a yarn monitoring device 8, a tension sensor 9, a yarn accumulating device 11, a waxing device 12, and a winding device 13. The draft device 6, the air spinning device 7, the guide unit 20, the yarn monitoring device 8, the tension sensor 9, the yarn accumulating device 11, the waxing device 12, and the winding device 13 are fixed to the main frame 2A. A unit controller (controller) 10 is provided for each of a predetermined number of spinning units 2 and controls the operation of the spinning units 2. Note that the unit controller 10 may be provided in each spinning unit 2. The unit controller 10 controls the operation timing of the holder 70 and the cutter 85, which will be described in detail later. These controls will be collectively described when describing the operation of the air spinning machine 1 during yarn splicing, which will be described in detail later.

[0026] The draft device 6 drafts the sliver S. The draft device 6 has, in order from the upstream side in the running direction of the sliver S, a back roller pair, a third roller pair, a middle roller pair, and a front roller pair. Each roller pair has a bottom roller and a top roller. The bottom rollers are rotationally driven by a drive motor (not shown) provided on the second end frame 5 or a drive motor (not shown) provided on each draft device 6.

[0027] The air spinning device 7 uses a swirling airflow to twist the fiber bundle F drafted by the draft device 6, producing yarn Y. The air spinning device 7 supplies the produced yarn Y downstream. In more detail (not shown), the air spinning device 7 has a spinning chamber, a fiber guide, a swirling airflow generating nozzle, and a hollow guide shaft. The fiber guide guides the fiber bundle F supplied from the upstream draft device 6 into the spinning chamber. The swirling airflow generating nozzle is disposed around the path along which the fiber bundle F travels. Air is sprayed from the swirling airflow generating nozzle, generating a swirling airflow within the spinning chamber. This swirling airflow inverts and swirls the fiber ends of the multiple fibers that make up the fiber bundle F. The hollow guide shaft guides the yarn Y from the spinning chamber to the outside of the air spinning device 7.

[0028] The guide part 20 regulates the yarn path of the yarn Y to a predetermined position. As shown in Fig. 3, the guide part 20 is provided on a resin base 2Aa attached to the main frame 2A. The guide part 20 has a yarn guide 20A in which a V-shaped yarn guide groove 20Aa is formed, and a waste yarn suction port 20B that can suck in waste yarn.

[0029] The yarn guide 20A stabilizes the yarn path of the yarn Y passing through the yarn monitoring device 8 and the tension sensor 9. The waste yarn suction port 20B is formed at the tip of the waste yarn suction pipe 61C. The waste yarn suction pipe 61C is connected to the suction duct 41 (see FIG. 2) via the remaining yarn suction pipe 61B and the suction capture pipe (suction pipe) 61A. This allows a suction airflow to be generated in the waste yarn suction port 20B. The waste yarn suction pipe 61C extends from its base end, which is the connection part (second connection part 62) with the remaining yarn suction pipe 61B, to the tip where the waste yarn suction port 20B is formed.

[0030] The yarn monitoring device 8 monitors the state of the traveling yarn Y between the air spinning device 7 and the yarn pooling device 11. The yarn monitoring device 8 monitors the state of the traveling yarn Y and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 8 detects a yarn defect, it transmits a yarn defect detection signal to the unit controller 10. When the unit controller 10 receives the yarn defect detection signal from the yarn monitoring device 8, it stops the operation of the air spinning device 7, thereby cutting the yarn Y. The cutting of the yarn Y may be achieved by stopping the drafting by the draft device 6 (rotation of the back roller pair).

[0031] The tension sensor 9 measures the tension of the traveling yarn Y between the air spinning device 7 and the yarn pooling device 11, and transmits a measurement signal to the unit controller 10.

[0032] The yarn pooling device 11 pools the yarn Y between the air spinning device 7 and the winding device 13. The yarn pooling device 11 has the functions of stably drawing out the yarn Y from the air spinning device 7, pooling the yarn Y sent out from the air spinning device 7 during a yarn joining operation by the yarn joining device 35, and preventing the yarn Y from slackening, and adjusting the tension of the yarn Y on the winding device 13 side to prevent fluctuations in the tension of the yarn Y on the winding device 13 side from being transmitted to the air spinning device 7.

[0033] As shown in FIG. 4, the yarn storage device 11 includes a yarn storage roller 11A, an electric motor 11B, a stored yarn amount sensor 11C, a yarn hooking member 11D, a yarn removal member 11E, a remaining yarn suction port 11F, a first guide member 11J, and a second guide member 11K.

[0034] The yarn storage roller 11A is fixed to the drive shaft of the electric motor 11B and is rotated by the electric motor 11B. The yarn storage portion 11Aa of the yarn storage roller 11A is a cylindrical portion around which the yarn Y is wound. The yarn storage amount sensor 11C is a sensor that detects the presence or absence of the yarn Y on the yarn storage roller 11A in a non-contact manner. The yarn storage amount sensor 11C is disposed to face the yarn storage portion 11Aa. When the amount of the yarn Y wound around the yarn storage roller 11A reaches a lower limit, the yarn storage amount sensor 11C transmits a lower limit storage amount detection signal to the unit controller 10. When the amount of the yarn Y wound around the yarn storage roller 11A reaches an upper limit, the yarn storage amount sensor 11C transmits an upper limit storage amount detection signal to the unit controller 10. The yarn storage amount sensor 11C may be configured not as a single sensor but as two sensors, a lower limit storage amount detection sensor and an upper limit storage amount detection sensor.

[0035] The yarn hooking member 11D is located on the winding device 13 side (tip side) of the yarn storage roller 11A and hooks the yarn Y and winds it around the yarn storage roller 11A. The yarn hooking member 11D is supported on the tip side of the yarn storage roller 11A so as to be rotatable relative to the yarn storage roller 11A about the same axis. The tip of the yarn hooking member 11D is curved to face the yarn storage section 11Aa so that the yarn Y can be hooked thereon.

[0036] The yarn removing member 11E is a member that removes the yarn Y from the yarn hooking member 11D and is located immediately downstream of the tip side of the yarn pooling roller 11A. The yarn removing member 11E is supported so that it can swing between a lowered position and an elevated position. The lowered position is a position where the yarn removing member 11E is retracted from the yarn path, and the elevated position is a position where the yarn removing member 11E pushes up the yarn Y on the yarn path to remove the yarn Y from the yarn hooking member 11D.

[0037] The residual yarn suction port 11F is formed at the tip of the residual yarn suction pipe 61B. The residual yarn suction pipe 61B is connected to the suction duct 41 (see FIG. 2) via the suction capture pipe 61A. This allows a suction airflow to be generated at the residual yarn suction port 11F. The residual yarn suction pipe 61B extends from its base end, which is the connection part (first connection part 63) with the suction capture pipe 61A, to the tip where the residual yarn suction port 11F is formed. For example, waste yarn (residual yarn) such as yarn Y remaining on the yarn storage roller 11A when a yarn breaks or the like is sucked and removed by the residual yarn suction port 11F. Note that the term "waste yarn" here may also include fly.

[0038] The first guide member 11J is disposed between the tension sensor 9 and the yarn storage roller 11A, and guides the yarn Y supplied from the tension sensor 9 to the yarn storage section 11Aa. The second guide member 11K is disposed between the yarn storage roller 11A and the winding device 13, and guides the yarn Y to a predetermined position in the waxing device 12. The second guide member 11K regulates the trajectory of the yarn Y swung by the rotating threading member 11D, and stabilizes the running of the yarn Y downstream of the second guide member 11K.

[0039] Returning to FIGS. 1 and 2, the waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding device 13.

[0040] When the yarn Y is broken, the suction capturing device 50 sucks and captures the yarn Y on the package P side. The suction capturing device 50 is disposed so as to face the yarn path between the yarn pooling device 11 and the winding device 13, more specifically, the yarn path between the waxing device 12 and the winding device 13. Although the present embodiment describes a configuration in which the suction capturing device 50 is fixedly provided, the suction capturing device 50 may also be provided so as to be slightly movable. For example, the suction capturing device 50 may be provided so as to be slightly movable toward and away from the yarn path of the yarn Y. In other words, the suction capturing device 50 is disposed so as not to move as much as the suction mouth 28. When the yarn splicing cart 3 performs work on the spinning unit 2, the suction capturing device 50 is located upstream of the yarn splicing device 35 provided on the yarn splicing cart 3.

[0041] As shown in FIGS. 2, 5A, and 5B, the suction capture device 50 includes a suction capture pipe 61A, a suction capture port 51, a holding portion 70, and a cutter 85. The suction capture pipe 61A extends from a base end 61Aa, which is a connection portion with the suction duct 41 (see FIG. 2), to a tip end 61Ab, and suction air flows from the tip end 61Ab toward the base end 61Aa. In the direction D of suction air flow, the holding portion 70, the cutter 85, and the suction duct 41 are arranged in this order downstream of the suction capture port 51. The suction capture device 50 may be configured by integrating the suction capture pipe 61A, the suction capture port 51, the holding portion 70, and the cutter 85 into a single unit. In this case, the entire suction capture device 50 can be easily replaced.

[0042] 2 illustrates the suction capture pipe 61A, the residual yarn suction pipe 61B, and the waste yarn suction pipe 61C, but the actual arrangement of the suction capture pipe 61A, the residual yarn suction pipe 61B, and the waste yarn suction pipe 61C does not necessarily match the arrangement shown in the figure. For example, a linear portion illustrated may be arranged in a curved shape, and a curved portion illustrated may be arranged in a linear shape. Furthermore, the components used as the suction capture pipe 61A, the residual yarn suction pipe 61B, and the waste yarn suction pipe 61C may be formed by appropriately combining linear pipes, curved pipes, flexible pipes, etc.

[0043] The suction capture port 51 is formed at the tip 61Ab of the suction capture pipe 61A. The suction capture port 51 opens to face the yarn path between the yarn pooling device 11 and the winding device 13. The holding unit 70 holds the yarn Y sucked through the suction capture port 51 in a part of the suction capture pipe 61A. The holding unit 70 is provided so as to be able to advance and retreat from a holding area A1, which is a part of the suction capture pipe 61A. The holding unit 70 is provided so as to be able to advance and retreat from the holding area A1 by a linear motion mechanism such as an air cylinder or a ball screw.

[0044] The holding unit 70 of this embodiment is driven by an air cylinder 71. The air cylinder 71 has a rod 71A, a portion of which is formed the holding unit 70, a casing 71B that slidably supports the rod 71A, and a connection port 71C that supplies and discharges compressed air to and from the casing 71B. The holding unit 70 may be formed as part of the rod 71A, or may be formed at the tip of the rod 71A as a separate body from the rod 71A, for example. The rod 71A is configured to advance into the holding area A1 when compressed air is supplied to the casing 71B via the connection port 71C, and to retreat from the holding area A1 when compressed air is discharged from the casing 71B via the connection port 71C.

[0045] In this embodiment, when the yarn Y is broken, the rod 71A holds the yarn Y on the package P side that has been sucked into the suction capture pipe 61A, and releases the hold of the yarn Y simultaneously with or before the yarn joining device 35 starts the yarn shifting operation. The unit controller 10 monitors for the occurrence of breakage of the yarn Y by receiving a yarn defect detection signal, a yarn breakage detection signal, or the like, and switches the rod 71A from a closed state that blocks the flow of suction air to an open state that allows the flow of suction air in response to the occurrence of breakage of the yarn Y. The rod 71A switches to the open state before the yarn Y stored in the yarn storage device 11 runs out. The rod 71A switches to the closed state after starting winding of the package P. The operation of the rod 71A is controlled by the unit controller 10.

[0046] The holding area A1 of this embodiment is formed to include a bent portion 65 formed in a portion between the base end 61Aa and the tip end 61Ab of the suction capture pipe 61A. The bent portion 65 of the suction capture pipe 61A also serves to bend the flow path of the suction air of the suction capture pipe 61A. In other words, the bent portion 65 also serves to bend the yarn Y sucked through the suction capture port 51 by bringing it into contact with a portion of the interior of the suction capture pipe 61A.

[0047] When the rod 71A advances into the holding area A1, a portion of the rod 71A is located in a region upstream of the bent portion 65 in the flow direction D of the suction air. In this embodiment, a collar member 75 that narrows the inner diameter of the suction capture pipe 61A is disposed in a region upstream of the bent portion 65 inside the suction capture pipe 61A. The portion corresponding to the collar member 75 may be formed as part of the suction capture pipe 61A. The cross-sectional shapes of the inner peripheral surfaces of the suction capture pipe 61A and the collar member 75 are circular. The outer diameter of the collar member 75 is approximately the same as the outer diameter of the rod 71A. The rod 71A is formed in a cylindrical shape. A tapered surface 71Ab is formed at the tip end 71Aa, which is the advancing side of the rod 71A. In this embodiment, the tapered surface 71Ab forms the holding portion 70. That is, the tapered surface 71Ab of the rod 71A presses the yarn Y against the end surface of the collar member 75, thereby holding the yarn Y. When the rod 71A advances into the holding area A1 and the tapered surface 71Ab comes into contact with the end surface of the collar member 75, the tip end 71Aa is aligned with the center of the collar member 75.

[0048] In this embodiment, when the rod 71A advances into the holding area A1, the tapered surface 71Ab of the rod 71A comes into contact with the end face of the collar member 75, blocking the end face of the collar member 75. This blocks the flow of suction air in the suction capture pipe 61A. That is, the rod 71A functions as a shutter that blocks the flow of suction air in the suction capture pipe 61A. The rod 71A moves linearly in the extension direction of the suction capture pipe 61A in the holding area A1, thereby switching between a holding state in which the yarn Y is held (see FIG. 5(B)) and a non-holding state in which the yarn Y is not held (see FIG. 5(A)). The rod 71A also switches between a blocking state in which the flow of suction air in the suction capture pipe 61A is blocked (see FIG. 5(B)) and a non-blocking state in which the flow of suction air is not blocked (see FIG. 5(A)).

[0049] 5(B), when the rod 71A advances into the holding area A1 and enters the holding and blocking states, the yarn Y is clamped between the end face of the collar member 75 and the tapered surface 71Ab of the rod 71A. The yarn Y clamped (held) between the collar member 75 and the rod 71A comes into contact with the end of the collar member 75 and is bent, and the yarn Y downstream of the bent part is sucked toward the suction duct 41 by the suction air.

[0050] The cutter 85 is provided downstream of the holding area A1 in the flow direction D of the suction air. More specifically, the cutter 85 is supported by the support portion 81. The cutter 85 is covered by the cover 83. The suction capture piping 61A is provided to penetrate the support portion 81 and the cover 83. The cutter 85 cuts the yarn Y sucked through the suction capture port 51. The cover 83 is formed of, for example, a transparent resin material. The operation timing of the cutter 85 is controlled to be the same as or after the operation timing of the rod 71A. The operation timing of the cutter 85 and the rod 71A is controlled by the unit controller 10.

[0051] The waste yarn suction pipe 61C has a tip end where the waste yarn suction port 20B is formed and a base end that is connected to the residual yarn suction pipe 61B at a second connection portion 62. The residual yarn suction pipe 61B has a tip end where the residual yarn suction port 11F is formed and a base end that is connected to the suction catch pipe 61A at a first connection portion 63. The first connection portion 63 is provided upstream of the holding area A1 in the flow direction D of the suction air. That is, the waste yarn suction pipe 61C and the residual yarn suction pipe 61B merge with the suction catch pipe 61A upstream of the position where the rod 71A holds the yarn Y in the flow direction D of the suction air.

[0052] The winding device 13 winds the yarn Y onto a bobbin B to form a package P. The winding device 13 has a cradle arm 21, a winding drum 22, and a traverse guide 23. The cradle arm 21 rotatably supports the bobbin B. The cradle arm 21 is swingably supported by a support shaft 24. When rotating the bobbin B (package P) in the winding direction (forward rotation), the cradle arm 21 brings the surface of the bobbin B or the surface of the package P into contact with the surface of the winding drum 22 with an appropriate pressure. A drive motor provided on the second end frame 5 simultaneously drives the winding drums 22 of the multiple spinning units 2. As a result, the bobbin B or package P is rotated in the winding direction in each spinning unit 2.

[0053] The traverse guide 23 of each spinning unit 2 is provided on a shaft shared by multiple spinning units 2. The drive motor of the second end frame 5 drives the shaft back and forth in the direction of the rotation axis of the winding drum 22, causing the traverse guide 23 to traverse the yarn Y at a predetermined width relative to the rotating bobbin B or package P.

[0054] If the yarn Y in one of the spinning units 2 is cut or broken for some reason, the yarn splicing cart 3 performs a yarn splicing operation on that spinning unit 2. A plurality of yarn splicing carts 3 are provided in the air spinning machine 1, for example. The yarn splicing carts 3 are provided so as to be movable relative to the plurality of spinning units 2, and move in the arrangement direction of the spinning units 2 (the left-right direction in FIG. 1). The yarn splicing cart 3 is movable to an operating position (a position where the yarn splicing operation is performed) relative to each of the plurality of spinning units 2.

[0055] The yarn splicing carriage 3 includes a yarn splicing device 35 , a suction nozzle 27 , a suction mouth 28 , a reversing device 29 , and a carriage controller 32 .

[0056] 2 performs a yarn joining operation to make the yarn Y continuous when the yarn Y is broken between the air spinning device 7 and the winding device 13. The yarn joining device 35 holds and cuts the yarn Y captured by the suction mouth 28 with a clamp and cutter (not shown). The yarn joining device 35 holds and cuts the yarn Y captured by the suction nozzle 27 with a clamp and cutter (not shown).

[0057] The yarn splicing device 35 splices the cut yarn Y on the winding device 13 side with the cut yarn Y on the air spinning device 7 side. The yarn splicing device 35 is a splicer that uses compressed air, or a knotter that mechanically splices the yarns Y together. Alternatively, the yarn Y on the winding device 13 side may be spliced ​​by piecing, in which the yarn Y is run in reverse to the air spinning device 7, and then drafting by the draft device 6 and spinning by the air spinning device 7 are resumed, thereby making the yarn Y continuous between the air spinning device 7 and the winding device 13. In this embodiment, a splicer will be described as an example. In this embodiment, the yarn splicing device 35 is movable in a direction approaching (to the left in the example of FIG. 2) or away from (to the right in the example of FIG. 2) the path of the traveling yarn Y.

[0058] 6 and 7, the yarn joining device 35 includes a first untwisting pipe 36A constituting the first untwisting section 36Aa, a second untwisting pipe 36B constituting the second untwisting section 36Ba, a yarn joining section 35A, a pair of yarn pulling levers (yarn pulling members) 39A, 39A, and a pair of yarn presser levers 39B, 39B. The yarn joining section 35A is located forward of the first untwisting section 36Aa and the second untwisting section 36Ba. The pair of yarn pulling levers 39A, 39A can rotate to sandwich the first untwisting section 36Aa and the second untwisting section 36Ba between them. The pair of yarn presser levers 39B, 39B can rotate to sandwich the yarn joining section 35A between them.

[0059] A second guide plate 38 is arranged downstream (below) the first untwisting section 36Aa. A first guide plate 37 is arranged upstream (above) the second untwisting section 36Ba. The first guide plate 37 and the second guide plate 38 are arranged to face each other with the yarn joining section 35A in between. The first guide plate 37 is formed with guide grooves 37a and 37b. The second guide plate 38 is formed with guide grooves 38a and 38b. The guide groove 37a of the first guide plate 37 faces the guide groove 38a of the second guide plate 38 in the up-down direction. The guide groove 37b of the first guide plate 37 faces the guide groove 38b of the second guide plate 38 in the up-down direction.

[0060] The upstream yarn Y pulled by the yarn shifting levers 39A, 39A (i.e., the yarn Y guided by the suction nozzle 27) is guided into the guide grooves 37a and 38a. The downstream yarn Y pulled by the yarn shifting levers 39A, 39A (i.e., the yarn Y guided by the suction mouth 28 or the yarn Y sucked into the suction capture port 51) is guided into the guide grooves 37b and 38b.

[0061] A first clamp 37C is provided above the first guide plate 37, and a first cutter 38D is provided above the second guide plate 38. The first clamp 37C holds the upstream yarn Y introduced into the guide groove 37a. The first cutter 38D cuts the upstream yarn Y introduced into the guide groove 38a while the upstream yarn Y is held by the first clamp 37C. In other words, the first cutter 38D cuts the upstream yarn Y held by the first clamp 37C.

[0062] A second clamp 38C is provided below the second guide plate 38, and a second cutter 37D is provided below the first guide plate 37. The second clamp 38C holds the downstream yarn Y introduced into the guide groove 38b. The second cutter 37D cuts the downstream yarn Y introduced into the guide groove 37b while the downstream yarn Y is held by the second clamp 38C. In other words, the second cutter 37D cuts the downstream yarn Y held by the second clamp 38C.

[0063] The first untwisting unit 36Aa captures and untwists the yarn end of the upstream yarn Y resulting from cutting by the first cutter 38D, while the upstream yarn Y is held by the first clamp 37C. The second untwisting unit 36Ba captures and untwists the yarn end of the downstream yarn Y resulting from cutting by the second cutter 37D, while the downstream yarn Y is held by the second clamp 38C.

[0064] The yarn joining unit 35A has a yarn joining nozzle 35Aa. The yarn joining nozzle 35Aa includes a storage unit 35Ab and an inclined guide portion 35Ac. The inclined guide portion 35Ac guides the upstream yarn Y and the downstream yarn Y pulled by the yarn shifting levers 39A, 39A to the storage unit 35Ab. An air injection hole 35Ad is formed in the storage unit 35Ab. By the action of air injected from the air injection hole 35Ad, the yarn end untwisted by the first untwisting pipe 36A and the yarn end untwisted by the second untwisting pipe 36B are twisted together in the yarn joining unit 35A. When the yarn ends are twisted together at the yarn joining section 35A, the upstream yarn Y is held by the first clamp 37C and the downstream yarn Y is held by the second clamp 38C, and the yarn ends are pulled out from the first untwisting pipe 36A and the second untwisting pipe 36B by the yarn pulling levers 39A, 39A, and the pulled-out yarn ends are held down near the yarn joining section 35A by the yarn holding levers 39B, 39B.

[0065] The suction nozzle 27 is rotatably supported by a support shaft 27a, and captures the yarn Y on the air spinning device 7 side by suction, and guides it to the yarn joining device 35. The suction airflow during suction at the suction nozzle 27 is supplied from a suction duct (not shown). The suction nozzle 27 is movable among a standby position P11, a first yarn capturing position P12 where the suction nozzle 27 captures the yarn Y supplied from the air spinning device 7, and a first yarn guiding position P13 where the suction nozzle 27 guides the yarn Y to the yarn joining device 35. The standby position P11 and the first yarn guiding position P13 may be the same position. The movement (rotation) of the suction nozzle 27 is controlled by the carriage controller 32.

[0066] The suction mouth 28 is rotatably supported by a support shaft 28a. It moves close to the winding device 13 to capture the yarn Y on the winding device 13 side, and moves away from the winding device 13 to guide the captured yarn Y to the yarn joining device 35. The suction airflow during suction in the suction mouth 28 is supplied from a suction duct (not shown). The suction mouth 28 is movable between a standby position P21, a second yarn capturing position P22 where it captures the yarn Y from the winding device 13, and a second yarn guiding position P23 where it guides the yarn Y to the yarn joining device 35. The standby position P21 and the second yarn guiding position P23 may be the same position. The movement (rotation) of the suction mouth 28 is controlled by the carriage controller 32.

[0067] The reversing device 29 reverses the rotation of the package P of the winding device 13. The reversing device 29 has a support arm 30 and a reversing roller 31. One end of the support arm 30 is connected to a support shaft. This allows the support arm 30 to swing around the support shaft. The support arm 30 is moved by a drive unit (not shown), such as a motor, between a retracted position where the reversing roller 31 does not contact the package P and a contact position where the reversing roller 31 contacts the package P. The swing of the support arm 30 is controlled by a carriage controller 32.

[0068] The reverse roller 31 is provided at the other end of the support arm 30. The reverse roller 31 rotates (reverses) the package P in the unwinding direction, which is the opposite direction to the winding direction. When rotating the package P in the unwinding direction, the cradle arm 21 lifts up the surface of the package P away from the surface of the winding drum 22, and the yarn splicing carriage 3 brings the reverse roller 31 into contact with the surface of the package P. This allows the package P in contact with the reverse roller 31 to rotate in the unwinding direction. The rotation of the reverse roller 31 is controlled by the carriage controller 32.

[0069] The carriage controller 32 comprehensively controls the operation of the yarn splicing carriage 3. The carriage controller 32 has an input / output interface for inputting and outputting signals to and from the outside, a ROM in which programs and information for processing are stored, a storage unit such as RAM for temporarily storing data, a CPU, a communication circuit, etc. Based on signals output by the CPU, the carriage controller 32 stores input data in the RAM, loads programs stored in the ROM into the RAM, and executes the programs loaded into the RAM to perform various processes. The carriage controller 32 is capable of communicating with the unit controller 10 and the machine controller 15.

[0070] The carriage controller 32 controls the yarn splicing operation by the yarn splicing carriage 3 and the movement of the yarn splicing carriage 3. The carriage controller 32 is connected to the unit controller 10. At an appropriate timing after the yarn monitoring device 8 of a certain spinning unit 2 detects a yarn defect, the unit controller 10 transmits a yarn splicing request signal to the machine controller 15. Upon receiving the yarn splicing request signal, the machine controller 15 transmits a control signal to the carriage controller 32. This allows the yarn splicing carriage 3 to perform a yarn splicing operation for the spinning unit 2 that transmitted the yarn splicing request signal.

[0071] When a package P becomes full in a certain spinning unit 2, the doffing cart doffs the package P and supplies a new bobbin B to the spinning unit 2.

[0072] As shown in FIG. 2, the cleaning device 49 is disposed so as to face the main frame 2A and the yarn path for the yarn Y. The cleaning device 49 is provided so as to be movable along the arrangement direction of the plurality of spinning units 2. The cleaning device 49 has a plurality of nozzles that blow out air. The cleaning device 49 blows air onto each of the plurality of spinning units 2 to blow away lint or fly lint adhering to the spinning units 2.

[0073] Next, the operation of the air spinning machine 1 during yarn splicing will be described. The unit controller 10 detects that the yarn Y has been severed by receiving a yarn defect detection signal, a yarn breakage detection signal, etc. When the unit controller 10 detects that the yarn Y has been severed, it switches the rod 71A from a closed state to an open state. More specifically, when the unit controller 10 detects that the yarn Y has been severed, it switches the rod 71A to an open state before the yarn Y stored in the yarn storage device 11 runs out. The remaining amount of yarn Y stored in the yarn storage device 11 is detected by the stored yarn amount sensor 11C or another sensor.

[0074] The unit controller 10 controls the air cylinder 71 to move the rod 71A out of the holding area A1, thereby switching the rod 71A to an open state. This allows suction airflow to flow through the suction capture pipe 61A, allowing the yarn Y on the package P side to be sucked through the suction capture port 51. The unit controller 10 causes the yarn Y on the package P side to be sucked through the suction capture port 51 into the suction capture pipe 61A, and then causes the rod 71A to hold the sucked yarn Y. That is, the unit controller 10 controls the air cylinder 71 to advance the rod 71A into the holding area A1, thereby switching the rod 71A to a closed state. The cutter 85 starts its cutting operation simultaneously with or after the rod 71A starts holding the yarn Y. This completes the preparation of the yarn Y on the package P side by the suction capture device 50. The unit controller 10 controls the traverse guide 23 to move the yarn Y to the central region in the width direction of the package P before the rod 71A is closed.

[0075] When the suction and capturing device 50 has completed preparation of the yarn Y on the package P side, the unit controller 10 causes the yarn splicing device 35 to start the yarn splicing operation via the carriage controller 32. Here, "starting the yarn splicing operation" includes starting to move the yarn splicing carriage 3 toward the spinning unit 2 that has completed preparation of the yarn Y on the package P side. If the yarn splicing carriage 3 is initially positioned at the spinning unit 2 that has completed preparation of the yarn Y on the package P side, the yarn splicing operation by the yarn splicing device 35 will start after the suction and capturing device 50 has completed preparation of the yarn Y on the package P side (i.e., after the yarn Y is cut by the cutter 85).

[0076] The unit controller 10 releases the rod 71A from holding the yarn Y at the same time as or before the yarn joining device 35 starts the yarn shifting operation. More specifically, the unit controller 10 releases the rod 71A from holding the yarn Y at the same time as or before the yarn shifting levers 39A, 39A in the yarn joining device 35 start operating. The unit controller 10 controls the air cylinder 71 to move the rod 71A out of the holding area A1, thereby switching the rod 71A to an open state. This makes it possible to reduce the tension generated in the yarn Y on the package P side during the yarn shifting operation.

[0077] Thereafter, the yarn Y on the package P side and the yarn Y on the air spinning device 7 side are guided to the yarn splicing section 35A by the yarn pulling levers 39A, 39A, and yarn splicing is performed. After starting winding of the package P, the unit controller 10 switches the rod 71A to the closed state. The unit controller 10 controls the air cylinder 71 to move the rod 71A into the holding area A1, thereby switching the rod 71A to the closed state.

[0078] The effects of the air spinning machine 1 of the above embodiment will be described. In the air spinning machine 1 of the above embodiment, the yarn Y sucked through the suction capture port 51 is held by the rod 71A inside the suction capture pipe 61A, so the state of the yarn Y from the suction capture port 51 to the rod 71A is stable. Furthermore, in the air spinning machine 1 configured as described above, if the yarn shifting operation by the yarn joining device is performed while the yarn Y is held by the rod 71A, the tension in the yarn may increase and cause yarn breakage. However, the yarn joining device 35 releases the hold of the yarn Y simultaneously with or before starting the yarn shifting operation. This makes it possible to optimize the tension generated in the yarn Y when the yarn Y is guided to the yarn joining section 35A during the yarn joining operation by the yarn joining device 35. As a result, the yarn joining by the yarn joining device 35 can be performed stably.

[0079] In the air spinning machine 1 of the above embodiment, before the yarn shifting operation by the yarn joining device 35, the traverse guide 23 moves the yarn Y to the central region in the width direction of the package P. With this configuration, the cycle time for the yarn joining operation can be shortened.

[0080] In the air spinning machine 1 of the above embodiment, the cutter 85 starts the cutting operation simultaneously with the start of holding by the rod 71A or after the start of holding by the rod 71A. This allows the cutter 85 to reliably cut the yarn Y located downstream of the rod 71A.

[0081] In the air spinning machine 1 of the above embodiment, the rod 71A functions as a shutter that blocks the flow of suction air in the suction and capture piping 61A. This makes it possible to block the flow of suction air in the suction and capture piping 61A when the yarn Y is held and when the yarn Y does not need to be held, thereby reducing the amount of energy consumed by the blower 43.

[0082] In the air spinning machine 1 of the above embodiment, the rod 71A switches from a closed state in which the flow of suction air is blocked to an open state in which the flow of suction air is permitted in response to the severing of the yarn Y. This allows the severing of the yarn Y to be reliably captured while achieving energy conservation.

[0083] In the air spinning machine 1 of the above embodiment, the rod 71A switches to the open state before the yarn Y stored in the yarn storage device 11 runs out. As a result, the yarn Y, whose behavior is controlled, is sucked through the suction capture port 51, so that the rod 71A can reliably hold the yarn Y.

[0084] In the air spinning machine 1 of the above embodiment, after starting winding of the package P, the rod 71A switches to the closed state. This allows the flow of suction air to be blocked when there is no need to capture the yarn Y by the suction capturing device 50, thereby reducing the amount of energy consumed by the blower 43.

[0085] The air spinning machine 1 of the above embodiment is equipped with a cleaning device 49 that injects air. In the air spinning machine 1, the rod 71A holds the yarn Y inside the suction capture piping 61A, so even if the cleaning device 49 injects air, the behavior of the yarn Y does not become unstable. This allows the air spinning machine 1 to be kept in a state cleaned by the cleaning device 49, and the yarn joining operation by the yarn joining device 35 to be performed reliably.

[0086] In the air spinning machine 1 of the above embodiment, preparation of the yarn Y on the air spinning device 7 side begins after preparation of the yarn Y on the package P side is completed. This allows the yarn splicing operation to be performed efficiently. The state in which preparation of the yarn Y on the package P side is completed refers to a state in which the suction capturing device 50 has completed holding the yarn Y. In the case of the suction mouth 28, this state refers to a state in which the suction mouth 28 has captured the yarn Y and reached the second yarn guiding position P23.

[0087] In the air spinning machine 1 of the above embodiment, the air spinning device 7 starts preparing the yarn Y by moving the yarn splicing cart 3 toward the spinning unit 2 that is the target of the yarn splicing work. This allows the yarn splicing cart 3, which is shared by multiple spinning units 2, to be used efficiently.

[0088] Although one embodiment has been described above, one aspect of the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the invention.

[0089] In the above embodiment, the yarn splicing device 35 is provided in the yarn splicing carriage 3, but it may be provided in each of the spinning units 2 instead of in the yarn splicing carriage 3.

[0090] In the above embodiment and modified example, the suction capture device 50 is provided with the cutter 85, but the cutter 85 does not have to be provided. Even in this case, by holding the yarn Y, it is possible to reduce the propagation of the behavior of the yarn Y caused by swirling or tangling inside the suction duct 41 to the yarn Y outside the suction capture port 51.

[0091] In the above embodiment and the above modified example, the holding unit 70 has been described as having a shutter function, but the holding unit 70 does not necessarily have to have the shutter function. For example, the holding unit 70 may only have the function of holding the yarn Y inside the suction capture pipe 61A.

[0092] In the above embodiment and modified example, when the rod 71A of the air cylinder 71 advances into the holding area A1 by linear motion, the yarn Y is clamped between the rod 71A and the collar member 75 to hold the yarn Y, and the flow of suction air in the suction capture pipe 61A is blocked. However, this is not limiting. For example, the inner diameter of the suction capture pipe 61A on the upstream side of the holding area A1 may be formed to be approximately equal to the outer diameter of the rod 71A. Even in this case, when the rod 71A advances into the holding area A1 by linear motion, the yarn Y can be clamped between the rod 71A and the suction capture pipe 61A to hold the yarn Y, and the flow of suction air in the suction capture pipe 61A can also be blocked.

[0093] In the above embodiment and modified example, the suction capture device 50 has been described as having a configuration in which the holding part 70 is movable forward and backward relative to the holding area A1 by a linear motion mechanism such as an air cylinder 71 or a ball screw, but the present invention is not limited to this. For example, as shown in Fig. 8(A), the suction capture pipe 61A connected to the suction duct 41 may be formed of a rubber member or the like, and the suction capture pipe 61A may be crushed by pressing the suction capture pipe 61A from the outside. In this way, the inner circumferential surfaces of the suction capture pipe 61A come into contact with each other, and the yarn Y inside the suction capture pipe 61A is sandwiched between the inner circumferential surfaces, thereby allowing the yarn Y sucked through the suction capture port 51 to be held inside the suction capture pipe 61A.

[0094] The pressing mechanism (holding unit) 92 that presses down on the suction capture pipe 61A from the outside can be configured to include, for example, a pressing member 92A that is arranged to sandwich the suction capture pipe 61A in the vertical direction, and a base 92B. For example, the pressing member 92A can be provided to be movable in the vertical direction by a linear motion mechanism 91 that is configured by a ball screw 91A supported by a support member 91C and a drive unit 91B such as a motor that drives the ball screw 91A. Even with this pressing mechanism 92, the yarn Y sucked through the suction capture pipe 61A can be held within the suction capture pipe 61A.

[0095] 8(B), for example, the suction capture pipe 61A connected to the suction duct 41 may be made of a rubber member or the like, and the suction capture pipe 61A may be crushed by pinching it from the outside. This brings the inner circumferential surfaces of the suction capture pipe 61A into contact with each other, and the yarn Y inside the suction capture pipe 61A is pinched between the inner circumferential surfaces, thereby allowing the yarn Y sucked through the suction capture port 51 to be held inside the suction capture pipe 61A.

[0096] The clamping mechanism (holding unit) 95 that clamps the suction capture pipe 61A from the outside can include, for example, a support plate 95B having a through-hole 95Ba penetrating the suction capture pipe 61A in the extension direction, a rotating unit 95A that pushes the suction capture pipe 61A from below in the vertical direction to above in the vertical direction, and a driving unit 94. The rotating unit 95A is fixed to the support plate 95B so as to be rotatable about a rotation axis. The rotating unit 95A is rotated by a driving unit 94 such as a motor. In the clamping mechanism 95 configured as described above, the rotating unit 95A rotates counterclockwise in FIG. 8(B), thereby clamping the suction capture pipe 61A between the upper edge, which is a part of the through-hole 95Ba, and the rotating unit 95A. Even with this clamping mechanism 95, the yarn Y sucked through the suction capture pipe 61A can be held within the suction capture pipe 61A.

[0097] In the above embodiment and modified example, an example has been described in which the holder 70 moves in the extension direction of the suction capture pipe 61A to hold the yarn Y inside the suction capture pipe 61A, but the present invention is not limited to this. For example, the holder 70 may hold the yarn Y inside the suction capture pipe 61A by moving in a direction perpendicular to the suction capture pipe 61A. For example, a slit may be provided in the suction capture pipe 61A, and a plate-like member serving as the holder 70 may be inserted into the suction capture pipe 61A through the slit. The plate-like member that has entered the suction capture pipe 61A blocks the flow path through which suction air flows and presses the yarn Y against the inner circumferential surface of the suction capture pipe 61A to hold it.

[0098] In the above embodiment and the above modified example, the holding unit 70 has been described as having a shutter function, but the holding unit 70 does not have to have the shutter function. For example, the holding unit 70 may only have a function of holding the yarn Y inside the suction capture pipe 61A (for example, a gripping mechanism that grips the yarn Y).

[0099] In the above embodiment and modified example, an example was given in which the holding area A1 is formed in the bent portion 65, but the holding area A1 may also be formed in a straight section. [Explanation of symbols]

[0100] 1...Air spinning machine (yarn winding machine), 2...Spinning unit (winding unit), 2A...Main frame, 3...Yarn splicing cart, 6...Draft device, 7...Air spinning device, 8...Yarn monitoring device, 9...Tension sensor, 10...Unit controller, 11...Yarn storage device, 11F...Remaining yarn suction port, 13...Winding device, 20...Guide section, 20B...Waste yarn suction port, 35...Yarn splicing device, 39A...Yarn shifting lever (yarn shifting member), 41...Suction Duct, 43...blower, 49...cleaning device, 50...suction capture device, 51...suction capture port (suction port), 61A...suction capture piping (suction piping), 61B...remaining yarn suction piping, 61C...waste yarn suction piping, 65...bent portion, 70...holding portion, 71A...rod, 71Ab...tapered surface, 75...collar member, 83...cover, 85...cutter, 92...pressing mechanism (holding portion), 95...clamping mechanism (holding portion), A1...holding area, Y...yarn.

Claims

1. a plurality of winding units each including an air spinning device that generates yarn by twisting a fiber bundle with a swirling air flow, a winding device that winds the yarn supplied from the air spinning device to form a package, and a suction and capture device that is disposed between the air spinning device and the winding device and that sucks and captures the yarn on the package side when the yarn is broken between the air spinning device and the winding device; a yarn splicing device having a yarn shifting member that performs a yarn shifting operation to guide the yarn to a yarn splicing section that splices the divided yarn; a suction duct connected to each of the plurality of suction capture devices; a blower that generates a flow of suction air in the suction duct, Each of the suction capture devices comprises: a suction pipe extending from a base end portion, which is a connection portion with the suction duct, to a tip end portion, through which the suction air flows from the tip end portion toward the base end portion; a suction port formed at the tip end of the suction pipe; a holding section that holds at least a part of the yarn sucked through the suction port within the suction pipe, the holding section holds the yarn sucked into the suction pipe after the yarn breakage occurs, and releases the hold of the yarn simultaneously with or before the yarn joining device starts the yarn shifting operation.

2. The yarn winding machine according to claim 1 , further comprising a traverse guide that moves the yarn to a central region in the width direction of the package before the yarn shifting operation by the yarn joining device.

3. a cutter that is disposed in the suction pipe between the holding portion and the connecting portion and cuts the yarn sucked through the suction port within the suction pipe; 3. The yarn winding machine according to claim 1, wherein the cutter starts a cutting operation simultaneously with or after the holding portion starts holding the yarn.

4. The yarn winding machine according to any one of claims 1 to 3, wherein the holding portion functions as a shutter that blocks the flow of the suction air in the suction pipe.

5. The yarn winding machine according to claim 4 , wherein the holding section switches from a closed state in which the flow of the suctioned air is blocked to an open state in which the flow of the suctioned air is permitted in response to the severing of the yarn.

6. each of the plurality of winding units includes a yarn storage device that stores the yarn between the air spinning device and the winding device; The yarn winding machine according to claim 5 , wherein the holding section switches to the open state before the yarn stored in the yarn storage device runs out.

7. The yarn winding machine according to claim 5 or 6, wherein the holding section switches to the closed state after winding of the package starts.

8. The yarn winding machine according to any one of claims 1 to 7, further comprising a cleaning device that moves along the arrangement direction of the plurality of winding units while spraying air.

9. The yarn winding machine according to any one of claims 1 to 8, wherein preparation of the yarn on the air spinning device side starts after preparation of the yarn on the package side is completed.

10. The yarn winding machine according to claim 9, wherein the yarn splicing carriage starts moving toward the winding unit that is the target of the yarn splicing operation as the start of preparation of the yarn on the air spinning device side.

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