JP2016017254A - Spinning machine and spinning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a configuration which prevents an air spinning device from being clogged with fibers during yarn discharging spinning in a delivery-rollerless spinning machine.SOLUTION: A spinning machine includes an air spinning device and a yarn storage device. The air spinning device includes: a nozzle block which includes a first nozzle for generating a swirl air flow in a spinning chamber; and a hollow guide shaft body which is arranged downstream of the nozzle block in a fiber running direction and includes a second nozzle for generating a swirl air flow sucking a fiber bundle swirled in the spinning chamber. The yarn storage device draws out and stores a yarn formed in the air spinning device. During yarn discharging spinning, at least at the moment when the yarn starts to be wound around the yarn storage device, the first nozzle and the second nozzle generate the swirl air flows.SELECTED DRAWING: Figure 8

Description

  The present invention mainly relates to a method for performing yarn discharge spinning in a spinning machine that does not include a delivery roller.

  2. Description of the Related Art Conventionally, pneumatic spinning apparatuses that perform yarn discharging spinning are known. Yarn discharge spinning is a process of generating yarn by performing spinning different from normal spinning at the start of spinning. In an air spinning apparatus that performs yarn discharge spinning, a nozzle (first nozzle) is provided on a nozzle member, and a nozzle (second nozzle) is also provided on a hollow guide shaft. The air spinning device twists the fiber bundle drafted by the draft device at the start of spinning by the swirling air flow by the first nozzle and moves the fiber bundle downstream by the swirling air flow by the second nozzle. Add more twist while pulling. Patent Documents 1 and 2 disclose a spinning machine that performs this type of yarn spinning.

  In the spinning machines of Patent Documents 1 and 2, a delivery roller, a nip roller, and a slack tube are disposed downstream of the pneumatic spinning device. The delivery roller and the nip roller are arranged to face each other and pinch and pull out the yarn generated by the air spinning device. The slack tube is disposed downstream of the delivery roller and the nip roller, and sucks and temporarily stores the yarn generated by yarn discharge spinning.

  Patent Document 1 discloses that the swirling air flow by the auxiliary nozzle (second nozzle) of the hollow guide shaft body is stopped after the yarn generated by the yarn discharge spinning is sandwiched between the delivery roller and the nip roller.

JP 2001-146646 A JP 2003-278035 A

  When the yarn is pulled out from the pneumatic spinning device by the delivery roller and the nip roller, the yarn may slip with respect to the delivery roller due to insufficient clamping force. As a spinning machine considering this point, a spinning machine (delivery rollerless spinning machine) in which a delivery roller is omitted and a yarn accumulating device is disposed downstream of an air spinning device is known.

  When yarn delivery spinning is performed with this delivery rollerless spinning machine, the yarn generated by the pneumatic spinning device may not be stably drawn out, and the pneumatic spinning device may be clogged with fibers.

  In Patent Documents 1 and 2, it is assumed that the spinning machine includes a delivery roller, and no delivery rollerless spinning machine is described.

  A main object of the present invention is to provide a configuration in which a fiber is prevented from being clogged in an air spinning apparatus during yarn discharge spinning in a delivery rollerless spinning machine.

Means and effects for solving the problems

  According to a first aspect of the present invention, a spinning machine includes an air spinning device and a yarn storage device. The pneumatic spinning device is disposed downstream of the nozzle block in the fiber running direction of the nozzle block having a first nozzle that generates a swirling air flow in the spinning chamber, and sucks the fiber bundle swirled in the spinning chamber. A hollow guide shaft having a second nozzle for generating a swirling air flow. The yarn storage device stores the yarn generated by the pneumatic spinning device while pulling out the yarn. At the time of yarn discharge spinning, at least at the moment when the yarn starts to wind around the yarn storage device, the first nozzle and the second nozzle generate a swirling air flow.

  Since the second nozzle continues to generate the swirling air flow until the yarn is wound around the yarn accumulating device, the swirling air flow by the second nozzle assists in drawing and twisting, so that the fibers in the air spinning device are clogged. Can be prevented.

  The spinning machine stops the generation of the swirling airflow by the second nozzle while maintaining the generation of the swirling airflow by the first nozzle after the yarn is wound around the yarn storage device.

  After the yarn is wound around the yarn accumulating device, the yarn is stably pulled out by the yarn accumulating device, so that the swirling air flow by the second nozzle is not necessary. Therefore, the structure excellent in energy saving property is realizable by stopping generation | occurrence | production of the turning air flow by a 2nd nozzle.

  The spinning machine fixes at least one of a spinning speed, a draft ratio, and a yarn count from the start of yarn discharge spinning until the yarn is wound around the yarn storage device.

  If the above condition is changed before the yarn is stably pulled out from the yarn storage device, the amount of fiber bundles processed by the pneumatic spinning device changes. For this reason, yarn breakage or clogging of fibers in the air spinning device may occur. By fixing the above conditions until the yarn is wound around the yarn storage device, yarn breakage or fiber clogging can be prevented.

  The spinning machine changes at least one of a spinning speed, a draft ratio, and a count after the yarn is wound around the yarn accumulating device.

  After the yarn is stably pulled out from the yarn storage device, no fiber clogging or the like occurs even if the above conditions are changed. Therefore, the yarn can be generated by changing the conditions to meet the requirements.

  The spinning machine includes a guide member that brings the yarn generated by the pneumatic spinning device closer to the yarn storage device and winds the yarn around the yarn storage device. At the time of yarn discharging spinning, the generation of the swirling air flow by the second nozzle is stopped based on the timing when the guide member brings the yarn close to the yarn accumulating device.

  Thereby, generation | occurrence | production of the turning airflow by a 2nd nozzle can be stopped, without providing the detection part for exclusive use for detecting the timing when a thread | yarn is stably pulled out from a thread | yarn storage apparatus.

  The spinning machine includes a detection unit that detects the yarn stored in the yarn storage device. During yarn discharge spinning, the generation of the swirling air flow by the second nozzle is stopped based on the timing at which the detection unit detects the yarn.

  Thereby, the timing at which the yarn is stably pulled out from the yarn accumulating device can be reliably detected.

  The spinning machine includes a winding unit, a yarn joining device, and a catching and guiding device. The winding unit winds the yarn generated by the pneumatic spinning device into a package. The yarn splicing device splics the yarn from the winding unit and the yarn from the pneumatic spinning device. The catching and guiding device catches the yarn generated by the pneumatic spinning device and guides it to the yarn joining device.

  As a result, even if the spinning machine is configured to include a catching and guiding device that does not have a twisting function, for example, clogging of fibers in the pneumatic spinning device can be prevented.

  According to the second aspect of the present invention, the nozzle block having the first nozzle that generates the swirling air flow in the spinning chamber, and the nozzle block is disposed downstream of the nozzle block in the fiber traveling direction and swirled in the spinning chamber. The following spinning method is provided in a method of spinning out a yarn using an air spinning device including a hollow guide shaft body having a second nozzle that generates a swirling air flow for sucking the fiber bundle. In this spinning method, the first nozzle and the second nozzle generate a swirling air flow at the moment when the yarn starts to wind around the yarn storage device that stores the yarn generated by the pneumatic spinning device while drawing it.

  As a result, the second nozzle continues to generate the swirling air flow until the yarn is wound around the yarn accumulating device, so that the drawing and twisting assistance is performed by the swirling air flow by the second nozzle. Clogging can be prevented.

The side view which shows the structure of the spinning unit with which the spinning machine which concerns on one Embodiment of this invention is provided. Sectional drawing which shows the structure inside a pneumatic spinning apparatus. The expansion perspective view which shows the shape of a thread | yarn storage apparatus and a 1st guide. The side view which shows a mode when the catching guide apparatus is catching the thread | yarn. The side view which shows a mode when a capture guide apparatus guides spun yarn to a yarn splicing apparatus. The side view which shows the mode of the moment when a 1st guide moves and a spun yarn begins to wind around a yarn storage device. The flowchart which shows the process which stops generation | occurrence | production of the turning air flow by a 2nd nozzle, and changes spinning conditions. The timing chart which shows the timing which stops generation | occurrence | production of the turning airflow by a 2nd nozzle, and changes spinning conditions.

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

  The spinning machine includes a large number of spinning units arranged side by side and an unillustrated machine base control device that centrally manages the spinning units. Each spinning unit 2 produces a spun yarn 10 by spinning the fiber bundle 8 sent from the draft device 7 by the air spinning device 9, and winds the spun yarn 10 by the take-up unit 26 to form a package 50. To do.

  As shown in FIG. 1, each spinning unit 2 includes a draft device 7, an air spinning device 9, a yarn storage device 22, a yarn joining device 23, and a yarn monitoring device arranged in order from upstream to downstream. 25 and a winding unit 26. Each unit provided in the spinning unit 2 is controlled by a unit controller (not shown) provided in the spinning unit 2. However, each part with which the spinning unit 2 is provided may be controlled by a machine control device.

  The draft device 7 includes four draft rollers: a back roller 16, a third roller 17, a middle roller 19 on which a rubber apron belt 18 is mounted, and a front roller 20 in this order from the upstream side. Each draft roller is rotationally driven at a predetermined rotational speed. The draft device 7 has opposing rollers arranged to face each draft roller. In the present embodiment, the front roller 20 can be controlled independently of other draft rollers. The front rollers 20 of each spinning unit 2 may be driven individually, or the front rollers 20 of the plurality of spinning units 2 may be driven by a common drive motor.

  The draft device 7 conveys a sliver 15 supplied from a sliver case (not shown) via a sliver guide by sandwiching it between a rotating draft roller and a counter roller facing the sliver 15 to obtain a predetermined amount of fiber. The fiber bundle 8 is drawn (draft) until it becomes (or thickness).

  An air spinning device 9 is disposed immediately downstream of the front roller 20. The air spinning device 9 twists the fiber bundle 8 supplied from the draft device 7 to generate a spun yarn 10. In this embodiment, a pneumatic spinning device that twists the fiber bundle 8 using a swirling air flow is employed. As shown in FIG. 2, the pneumatic spinning device 9 includes a nozzle block (nozzle member) 30 and a hollow guide shaft body 34. The nozzle block 30 includes a fiber guide 31, a spinning chamber 32, and a first nozzle 33. The hollow guide shaft body 34 includes a yarn passage 35 and a second nozzle 36. Each part of the pneumatic spinning device 9 is controlled by a unit controller.

  The fiber guide 31 is a member that guides the fiber bundle 8 drafted by the draft device 7 toward the inside of the pneumatic spinning device 9. The fiber guide 31 is formed with a fiber inlet 31a and a guide needle 31b. The fiber bundle 8 drafted by the draft device 7 is introduced from the fiber introduction port 31a and guided into the spinning chamber 32 so as to be wound around the guide needle 31b. The first nozzle 33 ejects air into the spinning chamber 32 and generates a swirling air flow in the spinning chamber 32. Thereby, a swirling air flow acts on the fiber bundle 8 in the spinning chamber 32.

  The hollow guide shaft body 34 is a cylindrical member, and a yarn passage 35 is formed therein. The second nozzle 36 ejects air into the yarn passage 35 to generate a swirling air flow in the yarn passage 35. The swirling air flow generated by the second nozzle 36 is in the opposite direction to the swirling air flow generated by the first nozzle 33.

  When performing yarn discharge spinning, air is jetted from both the first nozzle 33 and the second nozzle 36 to generate a swirling air flow. The fiber bundle 8 drafted by the draft device 7 is guided inside the pneumatic spinning device 9 by the fiber guide 31. The air ejected from the first nozzle 33 flows in the feeding direction of the fiber bundle 8 while swirling. Thereby, the fiber bundle 8 is sent to the hollow guide shaft body 34 in a loose false twist state.

  Since the yarn passage 35 is formed such that the cross-sectional area on the downstream side is larger than the cross-sectional area on the upstream side, the swirling air flow flows toward the downstream side in the yarn passage 35. Thereby, the fiber bundle 8 can be sent to the downstream side of the yarn passage 35. Since the swirling air flow generated in the yarn passage 35 is in the opposite direction to the swirling air flow in the spinning chamber 32, the fiber bundle 8 is formed into a bundled fiber by a known spinning method disclosed in JP2011-38210A or the like. It is discharged from the hollow guide shaft body 34 while being spun.

  Normal spinning is performed after spinning out the yarn. When normal spinning is performed, a swirling air flow is generated only from the first nozzle 33. The rear end of the fiber of the fiber bundle 8 supplied from the draft device 7 is swung around the front end of the hollow guide shaft 34 by the swirling air flow generated by the first nozzle 33. Thereby, twist is added to the fiber bundle 8 and the spun yarn 10 is produced | generated. The spun yarn 10 is sent to the outside of the pneumatic spinning device 9 from a downstream yarn outlet (not shown) through a yarn passage 35 of the hollow guide shaft 34.

  As described above, the spun yarn 10 can be generated by twisting the fiber bundle 8 at the time of yarn discharge spinning and normal spinning.

  A first guide 61 (guide member, FIG. 3) for guiding the spun yarn 10 is disposed downstream of the pneumatic spinning device 9. The first guide 61 guides the spun yarn 10 to the yarn storage device 22. The first guide 61 is movable to draw the spun yarn 10 to the yarn accumulating device 22 when performing yarn splicing or the like.

  A yarn storage device 22 is provided downstream of the first guide 61. The yarn storage device 22 includes a yarn storage roller 41, an electric motor 42 that rotationally drives the yarn storage roller 41, a yarn hooking member 43, and a yarn amount detection sensor 44. When the spun yarn 10 is wound around the outer peripheral surface of the yarn accumulating roller 41, the spun yarn 10 is temporarily stored.

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

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

  The yarn amount detection sensor 44 is an optical sensor and detects whether or not the storage amount of the yarn storage device 22 is greater than or equal to a predetermined value.

  The yarn traveling direction on the upstream side of the yarn accumulating device 22 with respect to the installation surface of the spinning machine is substantially horizontal, but the yarn traveling direction on the downstream side of the yarn accumulating device 22 is obliquely upward. Therefore, the yarn path during winding of the spun yarn 10 is largely bent (90 ° or more) by the yarn storage device 22.

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

  The spinning unit 2 includes a catching guide device that guides the spun yarn 10 to the yarn joining device 23. The catching and guiding device includes a first catching and guiding device 27 that guides the first yarn, and a second catching and guiding device 28 that guides the second yarn to the yarn joining device 23.

  The base part of the first catching and guiding device 27 is rotatably supported, and the first catching and guiding device 27 can rotate in the vertical direction with the base part as a rotation center. The first catching and guiding device 27 is configured in a hollow shape and is connected to a blower (not shown), and can generate a suction air flow. The first catching and guiding device 27 can catch the yarn end of the first yarn by rotating downward (see FIG. 4). The first catching and guiding device 27 can guide the first yarn to the yarn joining device 23 by catching the first yarn and then rotating upward. If the first catching and guiding device 27 has a suction function, it can catch and guide the yarn end of the first yarn sent from the pneumatic spinning device 9. The first catching and guiding device 27 may not have a twisting function. In the present embodiment, the second nozzle 36 functions to twist the fiber bundle 8 at the time of yarn discharge spinning. However, the first catching and guiding device 27 may have a twisting function.

  The base part of the second catching and guiding device 28 is rotatably supported, and can be rotated in the vertical direction with the base part as a center of rotation. The second catching and guiding device 28 is also configured in a hollow shape and is connected to a blower (not shown), and can generate a suction air flow. The second catching and guiding device 28 can catch the yarn end of the second yarn by rotating upward (see the chain line in FIG. 1). The second catching and guiding device 28 can guide the second yarn to the yarn joining device 23 by catching the second yarn and then rotating downward.

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

  A yarn monitoring device 25 is provided downstream of the yarn joining device 23. The yarn monitoring device 25 monitors the thickness of the traveling spun yarn 10 with a capacitance sensor (not shown). The yarn monitoring device 25 transmits a yarn defect detection signal to the unit controller when detecting a yarn defect of the spun yarn 10 (a portion where the thickness of the spun yarn 10 is abnormal). When the unit controller receives the yarn defect detection signal, the unit controller drives the cutter 24 (yarn cutting device) disposed in the vicinity of the yarn monitoring device 25 to cut the spun yarn 10. The yarn monitoring device 25 is not limited to the electrostatic capacitance type sensor, and for example, the thickness of the spun yarn 10 may be monitored by a light transmission type sensor. Moreover, you may monitor the foreign material contained in the spun yarn 10 as a yarn defect.

  A winding unit 26 is disposed downstream of the yarn storage device 22. The winding unit 26 includes a cradle arm 52 and a winding drum 53. The yarn path from the yarn storage device 22 to the winding unit 26 is bent and guided by the downstream guide 63.

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

  The winding drum 53 rotates while being in contact with the winding pipe 51 or the outer peripheral surface of the package 50 by transmitting a driving force of a winding drum drive motor (not shown). A traverse groove (not shown) is formed on the outer peripheral surface of the winding drum 53, and the spun yarn 10 can be traversed with a predetermined width by the traverse groove. Thus, the winding unit 26 can form the package 50 by winding the spun yarn 10 around the winding tube 51 while traversing the spun yarn 10.

  Next, a process performed by the spinning unit 2 when starting spinning for piecing will be briefly described. 4 to 6, in order to make the drawings easy to understand, the next process is performed after one process is finished. However, the next process is started before one process is finished. Is also possible. The same processing is performed when spinning is started in order to start winding the spun yarn 10 around the new winding tube 51 without performing yarn splicing.

  When yarn breakage occurs during winding of the package 50, or when the spun yarn 10 is cut by the cutter 24, the spun yarn 10 is in a divided state. At this time, the winding unit 26 stops winding the package 50, the draft device 7 stops drafting the fiber bundle 8, and the pneumatic spinning device 9 stops spinning. Further, the first guide 61 moves to a position away from the yarn accumulating device 22.

  Next, the second catching and guiding device 28 catches the second yarn by rotating upward. Thereafter, the second catching and guiding device 28 rotates downward while catching the second yarn, thereby guiding the second yarn to a position where the yarn joining device 23 can perform the yarn joining.

  The first catching and guiding device 27 moves downward to a position where the first yarn can be caught. Then, the draft of the fiber bundle 8 by the draft device 7 is restarted, and the yarn is spun out by the pneumatic spinning device 9 so that the first yarn is sucked and caught by the first catching and guiding device 27. Thereafter, the first catching and guiding device 27 guides the first yarn to a position where the yarn joining device 23 can be spliced by rotating upward while sucking the first yarn. Thereby, as shown in FIG. 5, the first yarn and the second yarn are guided to the yarn joining device 23. Note that the pneumatic spinning device 9 of the present embodiment continues to generate a swirling air flow by the second nozzle 36 until the spun yarn 10 is wound around the yarn storage device 22 (detailed control will be described later).

  After the first catching and guiding device 27 and the second catching and guiding device 28 guide the first yarn and the second yarn to the yarn joining device 23, the first guide 61 moves so as to approach the yarn accumulating device 22 (FIG. 6). Accordingly, the first guide 61 guides the spun yarn 10 to the vicinity of the yarn accumulating device 22 while capturing the spun yarn 10.

  Thereby, the spun yarn 10 can be hooked on the yarn hooking member 43 of the yarn accumulating device 22. Accordingly, the spun yarn 10 can be started to be wound around the yarn accumulating roller 41. The air spinning device 9 stops the injection of air from the second nozzle 36 after the spun yarn 10 is wound around the yarn accumulating roller 41, and stops the generation of the swirling air flow by the second nozzle 36. Thereafter, when the piecing is completed, the winding drum 53 and the like that have been stopped are driven again. Thereby, winding of the package 50 can be restarted.

  Next, the control of the pneumatic spinning device 9 performed at the start of spinning will be described with reference to FIGS. In general, spinning conditions are set such that yarn breakage and fiber clogging in the air spinning device 9 are less likely to occur during yarn ejection spinning, and the air spinning device 9 performs yarn ejection under the spinning conditions.

  After starting yarn discharge spinning as described above (S101 in FIG. 7), the unit controller determines whether or not the spun yarn 10 is wound around the yarn storage device 22 (yarn storage roller 41) (S102). This determination can be made based on, for example, the timing at which the first guide 61 is moved closer to the yarn storage device 22, the timing at which the yarn amount detection sensor 44 detects the spun yarn 10 of a predetermined amount or more, and the like.

  At the moment when the first guide 61 starts to approach the yarn storage device 22, the spun yarn 10 is not yet wound around the yarn storage device 22. Therefore, after a predetermined time has elapsed from that moment, the unit controller determines that the spun yarn 10 is wound around the yarn storage device 22. Note that the spun yarn 10 may be regarded as being wound around the yarn accumulating device 22 when a predetermined time or more has elapsed since the start of yarn discharge spinning.

  When the unit controller determines that the spun yarn 10 is wound around the yarn accumulating device 22, the unit controller stops the injection of air from the second nozzle 36 and starts normal spinning (S103, time T2 in FIG. 8). In other words, at the moment when the spun yarn 10 starts to be wound around the yarn storage device 22 (time T1 in FIG. 8), the swirling air flow is still generated by the second nozzle 36. When the spun yarn 10 is wound around the yarn accumulating device 22 (mechanically taken up), the spun yarn 10 is stably pulled out from the air spinning device 9, and therefore the swirling air flow is generated by the second nozzle 36. It may be stopped.

  Next, the unit controller changes the spinning conditions (at least one of the spinning speed, the draft ratio, and the count) after the completion of the yarn discharge spinning according to the required package 50 (S104, time in FIG. 8). T2). When there is no need to change the spinning conditions between the yarn spinning and the normal spinning, the normal spinning is continued under the conditions of the yarn spinning. Note that the spinning conditions are not changed while the yarn spinning is being performed. By fixing the above conditions until the spun yarn 10 is wound around the yarn storage device 22, yarn breakage or fiber clogging can be prevented.

  In Patent Documents 1 and 2, a delivery roller is disposed immediately downstream of the pneumatic spinning device. Accordingly, the spun yarn is pulled out from the pneumatic spinning device by the delivery roller immediately after the start of spinning out the yarn. In other words, the spun yarn is mechanically pulled out even during yarn discharge spinning. For this reason, for example, even if the spinning conditions are changed during the yarn spinning, the fiber clogging or the like in the pneumatic spinning device hardly occurs. Since the spinning machine of this embodiment is a delivery rollerless spinning machine, the spun yarn 10 drawn out from the pneumatic spinning device 9 is not mechanically drawn out at first, and is sucked and caught by the first catching and guiding device 27. It has only been done. Accordingly, for example, the fiber spinning may occur in the pneumatic spinning device 9 only by changing the spinning conditions during yarn spinning. As described above, Patent Documents 1 and 2 and the present application differ in the properties of the spun yarn handled during yarn discharge spinning.

  As described above, the spinning machine of the present embodiment includes the pneumatic spinning device 9 and the yarn storage device 22. The air spinning device 9 includes a nozzle block 30 having a first nozzle 33 that generates a swirling air flow in the spinning chamber 32, and fibers that are disposed downstream of the nozzle block 30 in the fiber traveling direction and swirled in the spinning chamber 32. A hollow guide shaft body 34 having a second nozzle 36 for generating a swirling air flow for sucking the bundle 8 is provided. The yarn storage device 22 stores the spun yarn 10 generated by the pneumatic spinning device 9 while drawing it out. At the time of spinning out the yarn, at least at the moment when the spun yarn 10 starts to wind around the yarn storage device 22, the first nozzle 33 and the second nozzle 36 generate a swirling air flow.

  Accordingly, since the swirling air flow by the second nozzle 36 continues to be generated until the spun yarn 10 is wound around the yarn accumulating device 22, the swirling air flow by the second nozzle 36 assists drawing and twisting. Clogging of fibers in the spinning device 9 can be prevented. Further, since the generation of the swirling air flow by the second nozzle 36 is continued, the first catching and guiding device 27 may not have the twisting function.

  The spinning machine of the present embodiment generates the swirling air flow by the second nozzle 36 while maintaining the state in which the swirling air flow by the first nozzle 33 is generated after the spun yarn 10 is wound around the yarn storage device 22. Stop.

  After the spun yarn 10 is wound around the yarn accumulating device 22, the spun yarn 10 is stably pulled out by the yarn accumulating device 22, so that the swirling air flow by the second nozzle 36 is not necessary. Therefore, by stopping the generation of the swirling air flow by the second nozzle 36, a configuration excellent in energy saving can be realized.

  The spinning machine of the present embodiment fixes at least one of the spinning speed, the draft ratio, and the yarn count from the start of yarn discharge spinning until the spun yarn 10 is wound around the yarn storage device 22.

  If the above conditions are changed before the spun yarn 10 is stably drawn out from the yarn storage device 22, the amount of the fiber bundle 8 processed by the pneumatic spinning device 9 changes. For this reason, yarn breakage or clogging of fibers in the air spinning device 9 may occur. By fixing the above conditions until the spun yarn 10 is wound around the yarn storage device 22, yarn breakage or fiber clogging can be prevented.

  The spinning machine according to the present embodiment changes at least one of the spinning speed, the draft ratio, and the count after the spun yarn 10 is wound around the yarn accumulating device 22.

  After the spun yarn 10 is stably pulled out from the yarn storage device 22, no fiber clogging or the like occurs even if the above conditions are changed. Therefore, the spun yarn 10 can be generated by changing the conditions to meet the requirements.

  The spinning machine of this embodiment includes a first guide 61 that brings the spun yarn 10 generated by the pneumatic spinning device 9 close to the yarn accumulating device 22 and winds the spun yarn 10 around the yarn accumulating device. During yarn discharge spinning, the generation of the swirling air flow by the second nozzle 36 is stopped based on the timing at which the first guide 61 brings the spun yarn 10 closer to the yarn storage device 22.

  Accordingly, the generation of the swirling airflow by the second nozzle 36 can be stopped without providing a dedicated detection unit for detecting the timing at which the spun yarn 10 is stably pulled out from the yarn storage device 22.

  The spinning machine according to the present embodiment includes a yarn amount detection sensor 44 that detects the spun yarn 10 stored in the yarn storage device 22. During yarn discharge spinning, the generation of the swirling air flow by the second nozzle 36 is stopped based on the timing at which the yarn amount detection sensor 44 detects the spun yarn 10.

  Thereby, the timing at which the spun yarn 10 is stably pulled out from the yarn storage device 22 can be reliably detected.

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

  The guide needle 31b may be omitted, and the function of the guide needle 31b may be achieved by the downstream end portion of the fiber guide 31.

  Instead of the configuration in which the yarn splicing device 23 is provided for each spinning unit 2, a configuration in which a work carriage that can move between the spinning units 2 is provided and the work cart performs yarn splicing may be employed.

9 Pneumatic spinning device 10 Spun yarn 22 Yarn storage device 27 First catching guide device (trapping guide device)
28 Second catching and guiding device 30 Nozzle block 33 First nozzle 34 Hollow guide shaft body 36 Second nozzle 41 Yarn accumulating roller 61 First guide (guide member)

Claims (8)

A nozzle block having a first nozzle that generates a swirling air flow in the spinning chamber, and a swirling air flow that is disposed downstream of the nozzle block in the fiber traveling direction and sucks the fiber bundle swirled in the spinning chamber. An air spinning device including a hollow guide shaft body having a second nozzle to be made;
A yarn storage device for storing while pulling out the yarn generated by the pneumatic spinning device;
With
A spinning machine characterized in that at the moment when the yarn starts to wind around the yarn accumulating device at the time of yarn discharge spinning, the first nozzle and the second nozzle generate a swirling air flow. The spinning machine according to claim 1,
A spinning machine characterized in that after the yarn is wound around the yarn accumulating device, the generation of the swirling air flow by the second nozzle is stopped while the generation of the swirling air flow by the first nozzle is maintained. The spinning machine according to claim 1 or 2,
A spinning machine characterized by fixing at least one of a spinning speed, a draft ratio, and a yarn count from the start of yarn discharge spinning until the yarn is wound around the yarn storage device. The spinning machine according to claim 3, wherein
A spinning machine characterized by changing at least one of a spinning speed, a draft ratio, and a count after a yarn is wound around the yarn storage device. The spinning machine according to any one of claims 1 to 4, wherein
A guide member for bringing the yarn generated by the pneumatic spinning device closer to the yarn storage device and winding the yarn around the yarn storage device;
A spinning machine characterized in that, during yarn discharge spinning, generation of a swirling air flow by the second nozzle is stopped based on a timing at which the guide member approaches the yarn storage device. The spinning machine according to any one of claims 1 to 4, wherein
A detection unit for detecting the yarn stored in the yarn storage device;
A spinning machine that stops generation of a swirling air flow by the second nozzle based on a timing at which the detection unit detects a yarn during yarn discharge spinning. The spinning machine according to any one of claims 1 to 6,
A winding unit for winding the yarn generated by the pneumatic spinning device into a package;
A yarn joining device for joining the yarn from the winding unit and the yarn from the pneumatic spinning device;
A catching and guiding device for catching and guiding the yarn generated by the pneumatic spinning device to the yarn joining device;
A spinning machine characterized by comprising: A nozzle block having a first nozzle that generates a swirling air flow in the spinning chamber, and a swirling air flow that is disposed downstream of the nozzle block in the fiber traveling direction and sucks the fiber bundle swirled in the spinning chamber. In a method of performing yarn discharge spinning using an air spinning device including a hollow guide shaft body having a second nozzle to be
The spinning method, wherein the first nozzle and the second nozzle generate a swirling air flow at the moment when the yarn starts to wind around the yarn storage device that draws and stores the yarn generated by the pneumatic spinning device. .

Images