Air spinning machine and suctioning / catching device

Abstract

To provide an air spinning machine and a suctioning / catching device, which can maintain stable catching state when suctioning and catching a yarn.SOLUTION: A suctioning / catching device 50 provided on an air spinning machine 1 comprises: a suctioning / catching piping 61A, which extends from a base end 61Aa as a connection part with a suction duct 41 to a tip 61Ab and allows suction air to flow therein from the tip 61Ab toward the base end 61Aa; a suctioning / catching port 51 formed on the tip 61Ab of the suctioning / catching piping 61A; a holding part 70 to hold a yarn Y suctioned from the suctioning / catching port 51 in the suctioning / catching piping 61A; and a cutter 85 to cut the yarn Y suctioned from the suctioning / catching port 51 in the suctioning / catching piping 61A. The holding part 70, the cutter 85, and the base end 61Aa are disposed in this order on downstream side of a first suction port 51 in a direction along which the suction air flows.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] One aspect of the present invention relates to an air spinning machine and a suction capture device. [Background technology]

[0002] For example, Patent Document 1 discloses an air spinning machine (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 a 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, in the conventional fixed capture device, the yarn is captured only by suction, so the captured state by the fixed capture device is sometimes unstable. Furthermore, if the yarn sucked through the suction port rotates or becomes tangled inside the suction pipe, the unstable behavior of the yarn inside the suction pipe may be propagated to the yarn outside the suction port, which may hinder the stabilization of the captured state. If the capture by the fixed capture device is unstable, for example, problems may occur in the yarn joining operation.

[0005] SUMMARY OF THE INVENTION It is therefore an object of one aspect of the present invention to provide an air spinning machine and a suction and catching device that can maintain a stable catching state when suction and catching a yarn. [Means for solving the problem]

[0006] An air spinning machine according to one aspect of the present invention includes a plurality of spinning 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, a yarn storage device that stores the yarn between the air spinning device and the winding device, and a suction capture device that is disposed between the yarn storage device and the winding device and that sucks in and captures the yarn on the package side when the yarn is broken between the air spinning device and the winding device; suction ducts connected to each of the plurality of suction capture devices; and and a blower that generates a flow of suction air in the direction of the suction air flow, and each suction capture device has a first suction pipe that extends from a base end that is a connection with the suction duct to a tip end, and through which suction air flows from the tip end to the base end, a first suction port formed at the tip end of the first suction pipe, a holding part that holds the yarn that is sucked through the first suction port within the first suction pipe, and a cutter that cuts the yarn that is sucked through the first suction port within the first suction pipe, and the holding part, cutter and base end are arranged in this order downstream of the first suction port in the direction of the flow of suction air.

[0007] In an air spinning machine with this configuration, the yarn sucked through the first suction port is held by the holder within the first suction pipe, so the state of the yarn from the first suction port to the holder is stable. Furthermore, in an air spinning machine with this configuration, the yarn sucked through the first suction port is cut by a cutter located downstream of the holder within the first suction pipe, so the behavior of the yarn that has entered the suction duct, such as swirling or becoming tangled within the suction duct, is not transmitted to the yarn outside the first suction port. As a result, a stable captured state can be maintained when the yarn is sucked and captured.

[0008] In the air spinning 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 first suction pipe. With this configuration, for example, when the holding section holds the yarn, the flow of suction air in the first suction pipe is blocked, thereby reducing energy consumption in the blower.

[0009] In the air spinning machine according to one aspect of the present invention, the holding section may be provided so as to be able to move forward and backward relative to a holding area inside the first suction pipe, and may hold the yarn by advancing into the holding area. This configuration allows the function of holding the yarn and the function of acting as a shutter to be achieved with a simple configuration.

[0010] In an air spinning machine according to one aspect of the present invention, the first suction pipe has a bent portion, the holding area is formed to include the bent portion, and the holding portion may switch between a state in which it holds the yarn and a state in which it does not hold the yarn by linear motion. With this configuration, the yarn can be more reliably held by pressing the bent yarn by the linear motion, and the flow of suction air in the first suction pipe can be more reliably blocked.

[0011] In an air spinning machine according to one aspect of the present invention, the cross-sectional shape of the inner circumferential surface of the first suction pipe is circular, and the holding portion has a cylindrical rod and a tapered tip portion located on the advancing side, and when the holding portion advances into the holding region, at least a portion of the rod advances to a position inside the first suction pipe that is upstream of the bent portion. In this configuration, because the tip portion of the holding portion is tapered, the holding portion is automatically centered when it advances inside the first suction pipe, and holding errors by the holding portion can be reduced.

[0012] An air spinning machine according to one aspect of the present invention includes a second suction pipe having a second suction port provided so as to face a part of the yarn path of the yarn between the air spinning device and the yarn pooling device, and the second suction pipe may merge with the first suction pipe upstream of the position where the holder holds the yarn in the direction of flow of the suction air through the first suction pipe. With this configuration, the shutter function of each suction pipe leading to the multiple suction ports (first suction port and second suction port) can be realized by a single member (i.e., the holder).

[0013] The air spinning machine according to one aspect of the present invention may include a control unit that controls the timing of the cutter to operate at the same time as or after the operation of the holding unit. With this configuration, the yarn is cut while being held by the holding unit, thereby enabling stable cutting of the yarn.

[0014] The air spinning machine according to one aspect of the present invention may be provided with a cover that covers the cutter. This configuration prevents fluff from adhering to the cutter (while achieving energy savings) without providing a conventional configuration for blowing away fluff. If fluff adheres to the cutter, its cutting function will be reduced. In the past, to prevent this reduction, a separate configuration for blowing away fluff was provided on the cutter.

[0015] a first suction port formed at the tip of the first suction pipe; a holding part that holds the yarn sucked through the first suction port within the first suction pipe; and a cutter that cuts the yarn sucked through the first suction port within the first suction pipe. The holding part, the cutter, and the base part are arranged in this order downstream of the first suction port in the direction of the flow of the suction air. The holding part is provided so as to be able to advance and retreat relative to a holding area formed to include the bent part of the first suction pipe.

[0016] In this suction capture device, the yarn sucked through the first suction port is held by the holder within the first suction pipe, stabilizing the state of the yarn from the first suction port to the holder. Furthermore, the yarn sucked through the first suction port is cut by a cutter located downstream of the holder within the first suction pipe, preventing the yarn from swirling or becoming tangled within the suction duct and propagating to yarn outside the first suction port. This allows a stable capture state to be maintained when the yarn is suction-captured. [Effects of the Invention]

[0017] According to one aspect of the present invention, when a yarn is sucked and caught, a stable caught state can be maintained. [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] Fig. 6(A) is a perspective view of a suction and capture device according to a modified example, and Fig. 6(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 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 2 that produce yarn Y and wind it into a package P, and a suction duct 41. The plurality of spinning units 2 are arranged in one direction on the main frame 2A. 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 (second suction port) 20B, the residual yarn suction port (second suction port) 11F, and the suction capture port (first 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] 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 (control unit) 10 is provided for each of a predetermined number of spinning units 2 and controls the operation of the spinning units 2. The unit controller 10 may be provided in each spinning unit 2. The unit controller 10 controls the operation timing of the cutter 85 and the holding unit 70, 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 portion 20 regulates the yarn path of the yarn Y to a predetermined position. As shown in Fig. 3, the guide portion 20 is provided on a resin base 2Aa attached to the main frame 2A. The guide portion 20 has a yarn guide 20A in which a V-shaped yarn guide groove 20Aa is formed, and a waste yarn suction port (second 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 (second 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 (second suction pipe) 61B and the suction capture pipe (first 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 manner, and a curved portion illustrated may be arranged in a linear manner. 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] 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.

[0046] 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.

[0047] 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)).

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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 .

[0055] 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).

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] The effects of the air spinning machine 1 of the above embodiment will be described. In the air spinning machine 1 equipped with the suction capture device 50 of the above embodiment, the yarn Y sucked through the suction capture port 51 is held by the rod (holding portion) 71A within 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 of the above embodiment, if the yarn Y sucked into the suction duct 41 becomes tangled within the suction duct 41, the tension acting on the yarn Y may change. In this regard, in the air spinning machine 1 of the above embodiment, the yarn Y sucked through the suction capture port 51 is cut by the cutter 85 located downstream of the rod 71A within the suction capture pipe 61A. This prevents the behavior of the yarn Y entering the suction duct 41, such as swirling or becoming tangled within the suction duct 41, from spreading to the yarn Y outside the suction capture port 51. As a result, a stable capture state can be maintained when the yarn Y is sucked and captured.

[0066] In the air spinning machine 1 of the above embodiment, the rod 71A may have a shutter function that blocks the flow of suction air in the suction capture pipe 61A. This blocks the flow of suction air in the suction capture pipe 61A when the yarn Y is held, thereby reducing the amount of energy consumed by the blower 43.

[0067] In the air spinning machine 1 of the above embodiment, the rod 71A is provided so as to be able to advance and retreat with respect to the holding area A1 inside the suction capture pipe 61A, and advances into the holding area A1 to hold the yarn Y. This makes it possible to achieve the function of holding the yarn Y and the function of a shutter with a simple configuration.

[0068] In the air spinning machine 1 of the above embodiment, the holding area A1 is formed to include the bending portion 65, and the rod 71A uses linear motion to switch between a state in which it holds the yarn Y and a state in which it does not hold the yarn Y. This allows the yarn Y to be more reliably held by pressing the yarn Y bent by the bending portion 65 using linear motion, and also more reliably blocks the flow of suction air in the suction capture piping 61A.

[0069] In the air spinning machine 1 of the above embodiment, the tip 71Aa of the rod 71A is formed in a tapered shape. As a result, when the tip 71Aa of the rod 71A advances into the collar member 75 disposed inside the suction capture pipe 61A, the rod 71A is automatically aligned with the collar member 75. As a result, it is possible to reduce the occurrence of the rod 71A failing to hold the yarn Y.

[0070] In the air spinning machine 1 of the above embodiment, the suction pipes (residual yarn suction pipe 61B and waste yarn suction pipe 61C) leading to the multiple suction ports (residual yarn suction port 11F and waste yarn suction port 20B) merge with the suction catch pipe 61A upstream of the position (holding area A1) where the rod 71A holds the yarn Y, in the direction of the flow of suction air through the suction catch pipe 61A. This allows the shutter function of the suction pipes (residual yarn suction pipe 61B and waste yarn suction pipe 61C) leading to the multiple suction ports (residual yarn suction port 11F and waste yarn suction port 20B) to be realized by a single member (i.e., the rod 71A).

[0071] In the air spinning machine 1 of the above embodiment, the timing at which the cutter 85 operates is controlled to be the same as or after the operation timing of the rod 71A. In this configuration, the yarn Y is cut while being held by the rod 71A, so that the yarn Y can be cut stably.

[0072] The air spinning machine 1 of the above embodiment is provided with a cover 83 that covers the cutter 85. This configuration can prevent fluff from adhering to the cutter 85 without providing a fluff removal device or the like that blows away fluff, as in the past. If fluff adheres to the cutter 85, its cutting function will be reduced. In the past, in order to prevent this reduction, a fluff removal device or the like was provided separately to the cutter 85.

[0073] 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.

[0074] In the above embodiment, when the rod 71A of the air cylinder 71 advances into the holding area A1 by linear motion, the yarn Y is sandwiched 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 substantially 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 sandwiched 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.

[0075] In the above embodiment and modified example, the suction capture device 50 has been described as having a configuration in which the rod 71A as part of the holder 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. 6(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.

[0076] The pressing mechanism 92 that presses down on the suction capture pipe 61A from the outside can be configured to include, for example, a pressing member (holding portion) 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 portion 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.

[0077] 6(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.

[0078] The clamping mechanism 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 (holding unit) 95A that pushes the suction capture pipe 61A from below vertically to above vertically, and a drive 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 drive unit 94 such as a motor. In the clamping mechanism 95 configured as described above, the rotating unit 95A rotates counterclockwise in FIG. 6(B), thereby clamping the suction capture pipe 61A between the upper edge 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.

[0079] 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.

[0080] 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 a function of holding the yarn Y inside the suction capture pipe 61A (for example, a gripping mechanism that grips the yarn Y).

[0081] 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]

[0082] 1...Air spinning machine, 2...Spinning 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 (control part), 11...Yarn storage device, 11F...Remaining yarn suction port (second suction port), 13...Winding device, 20...Guide part, 20B...Waste yarn suction port (second suction port), 35...Yarn splicing device, 41...Suction duct, 43...Blower, 49...Cleaning device position, 50...suction capture device, 51...suction capture port (first suction port), 61A...suction capture piping (first suction piping), 61B...remaining yarn suction piping (second suction piping), 61C...waste yarn suction piping (second 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 spinning 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, a yarn pooling device that pools the yarn between the air spinning device and the winding device, and a suction and capturing device that is disposed between the yarn pooling 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 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 first 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 first suction port formed at the tip end of the first suction pipe; a holding section that holds the yarn sucked through the first suction port within the first suction pipe; a cutter that cuts the yarn sucked from the first suction port within the first suction pipe, the holding portion, the cutter, and the base end portion are arranged in this order downstream of the first suction port in a flow direction of the suction air.

2. The air spinning machine according to claim 1 , wherein the holding portion functions as a shutter that blocks the flow of the suction air in the first suction pipe.

3. The air spinning machine according to claim 2 , wherein the holding portion is provided so as to be able to advance into and retreat from a holding area inside the first suction pipe, and holds the yarn by advancing into the holding area.

4. the first suction pipe has a bent portion, the holding region is formed to include the bent portion, The air spinning machine according to claim 3 , wherein the holding portion switches between a state in which the yarn is held and a state in which the yarn is not held by linear motion.

5. The cross-sectional shape of the inner circumferential surface of the first suction pipe is circular, The holding portion has a cylindrical rod and a tapered tip portion located on the advancing side, The air spinning machine according to claim 4 , wherein when the holding portion advances into the holding region, at least a portion of the rod advances to a position inside the first suction pipe that is upstream of the bent portion.

6. a second suction pipe having a second suction port provided so as to face a part of a yarn path of the yarn between the air spinning device and the yarn pooling device; The air spinning machine according to any one of claims 2 to 5, wherein the second suction pipe joins the first suction pipe upstream of a position where the holding section holds the yarn in a flow direction of the suction air in the first suction pipe.

7. The air spinning machine according to any one of claims 1 to 6, further comprising a control unit that controls the timing at which the cutter operates so that the timing at which the cutter operates is the same as or later than the timing at which the holding unit operates.

8. The air spinning machine according to any one of claims 1 to 7, further comprising a cover that covers the cutter.

9. A suction and catching device used in a spinning unit having an air spinning device that generates a 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 yarn storage device that stores the yarn between the air spinning device and the winding device, a first suction pipe extending from a base end, which is a connection portion with a suction duct connected to a blower that generates a flow of suction air, to a tip end, through which the suction air flows from the tip end toward the base end, and having a bent portion formed in a part thereof; a first suction port formed at the tip end of the first suction pipe; a holding section that holds the yarn sucked through the first suction port within the first suction pipe; a cutter that cuts the yarn sucked from the first suction port within the first suction pipe, the holding portion, the cutter, and the base end portion are arranged in this order downstream of the first suction port in a flow direction of the suction air, The holding portion is arranged to be able to advance and retreat relative to a holding area formed to include the bent portion of the first suction pipe, and holds the yarn when it advances into the holding area.

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