JP2019026980A - Air spinning machine - Google Patents

Abstract

To provide an air spinning machine capable of appropriately removing yarn waste and/or fly waste and the like in a layout in which a winding device is arranged at a higher position than an upstream end of a drafting device.SOLUTION: An air spinning machine includes a drafting device 7, an air spinning device 9, a yarn accumulating device 22, a suction part 70, a winding device 26, a yarn joining device 23, a first guiding device 27, and a second guiding device 28. The yarn accumulating device 22 draws out a spun yarn produced by the air spinning device 9. The suction part 70 has a suction port formed opposing a fiber traveling path present between the air spinning device 9 and the yarn accumulating device 22. The winding device 26 is arranged at a higher position than an upstream end of the fiber traveling path of the drafting device 7. The yarn joining device 23 performs yarn joining. The first guiding device 27 catches a yarn end from the air spinning device 9 and then guides the yarn end to the yarn joining device 23. The second guiding device 28 catches a yarn end from the package 50 and then guides the yarn end to the yarn joining device 23.SELECTED DRAWING: Figure 1

Description

  The present invention mainly relates to an air spinning machine including a suction unit that removes yarn waste and / or fluff from a pneumatic spinning device.

  2. Description of the Related Art Conventionally, a spinning machine having a configuration for removing yarn waste generated by an air spinning device is known. Patent documents 1 and 2 disclose this kind of spinning machine.

  The spinning machine of Patent Literature 1 includes a spinning unit, a yarn slack eliminating unit, a winding device, and a yarn trap. The spinning unit generates spun yarn. The yarn slack eliminating part has a buffer function that prevents the fluctuation in the tension of the spun yarn on the winding device side from being transmitted to the spinning part side. The yarn trap is disposed above the yarn slack eliminating portion, and sucks and removes yarn waste generated when the spun yarn is cut by generating a suction flow from the suction port.

  The spinning machine of Patent Document 2 includes a spinning device, a defect detection device, and a cutter. The defect detection device is disposed on the downstream side of the spinning device, and detects a defect portion of the spun yarn. When the defect detection device detects a defect, the spun yarn is cut by the cutter. Patent Document 2 describes that a suction port (not shown) for removing the cut spun yarn is formed.

JP 2012-57274 A JP 2013-253358 A

  However, the spinning machines of Patent Documents 1 and 2 only disclose a method for removing yarn waste in a layout in which a winding device is arranged at a position lower than the upstream end of the draft device, and from the upstream end of the draft device. However, there is no description or suggestion of a configuration for removing lint in a layout in which the winding device is arranged at a higher position.

  A main object of the present invention is to provide an air spinning machine capable of appropriately removing yarn waste and / or fluff in a layout in which a winding device is arranged at a position higher than the upstream end of the draft device. .

Means and effects for solving the problems

  According to an aspect of the present invention, an air spinning machine having the following configuration is provided. That is, the pneumatic spinning machine includes a draft device, an air spinning device, a yarn drawing device, a suction unit, a winding device, a yarn joining device, a first guide device, and a second guide device. . The draft device drafts a sliver with a draft roller to form a fiber bundle. The pneumatic spinning device generates a spun yarn by performing normal spinning in which twist is applied to the fiber bundle drafted by the draft device by a swirling air flow. The yarn drawing device pulls out the spun yarn generated by the pneumatic spinning device. The suction part is formed with a suction port with respect to a fiber traveling path between the pneumatic spinning device and the yarn drawing device. The winding device is disposed at a position higher than the upstream end of the fiber travel path of the draft device, and winds the spun yarn drawn by the yarn drawing device to form a package. The yarn joining device performs yarn joining. The first guide device captures a yarn end from the pneumatic spinning device and guides the yarn end to the yarn joining device. The second guide device captures a yarn end from the package and guides the yarn end to the yarn joining device.

  As a result, the suction unit can remove yarn waste generated when the first guide device fails to capture the yarn end and / or fluff generated by the air spinning device during yarn discharge spinning (hereinafter referred to as fiber waste). Can be removed. Therefore, generation | occurrence | production of the yarn defect resulting from said fiber waste getting entangled with a spun yarn can be prevented.

  The pneumatic spinning machine preferably has the following configuration. That is, the pneumatic spinning device includes a fiber guide, a nozzle block, and a hollow guide shaft. The fiber guide guides the fiber bundle. In the nozzle block, the fiber bundle guided by the fiber guide is introduced, and a spinning chamber and a first nozzle through which air for generating a swirling air flow passes are formed. In the hollow guide shaft body, the fiber bundle that has passed through the nozzle block is introduced, and a yarn passage and at least a second nozzle through which air injected during yarn discharge spinning passes are formed. At the time of yarn spinning, the draft device is driven in the draft direction, and air is injected from at least the second nozzle.

  Even in an air spinning machine that performs yarn discharge spinning with the nozzle structure described above, fiber waste can be effectively removed by the suction portion.

  The pneumatic spinning machine preferably has the following configuration. That is, the suction part includes an opening / closing part provided in the suction port or a removal passage through which a suction flow flows. The open / close section opens the suction port or the removal passage to generate a suction flow in the suction port, and closes the suction port or the removal passage to close the suction port so that no suction flow is generated. The state can be switched.

  Thereby, since generation | occurrence | production and a stop of a suction flow are controllable, energy consumption can be suppressed, removing a fiber waste at a required timing.

  In the pneumatic spinning machine, it is preferable that the opening / closing portion is opened at least temporarily after the normal spinning by the pneumatic spinning device is stopped and before the start of yarn discharge spinning.

  Thereby, the fiber waste generated from the stop of normal spinning to the start of yarn discharge spinning can be removed by the suction part.

  The pneumatic spinning machine preferably has the following configuration. That is, the pneumatic spinning device is configured to be able to contact and separate the nozzle block and the hollow guide shaft body. A cleaning operation is performed in which air is injected from the first nozzle in a state where the nozzle block and the hollow guide shaft body are separated from each other at least once after the spun yarn is in a divided state and before the start of yarn discharge spinning. The opening / closing part is opened at least temporarily during the cleaning operation.

  Thereby, the fiber waste generated by the cleaning operation of the pneumatic spinning device can be removed by the suction part.

  In the pneumatic spinning machine, it is preferable that the opening / closing portion is switched to a closed state after the cleaning operation is finished and before the yarn discharge spinning is started.

  As a result, the suction flow generated by the suction portion can be prevented from affecting the yarn discharging spinning, and the yarn discharging spinning can be performed with high accuracy.

  In the pneumatic spinning machine, it is preferable that the opening / closing part is in a closed state at the start of yarn discharge spinning.

  Thereby, the suction flow generated by the suction portion can be prevented from interfering with the capturing operation by the first guiding device, and the first guiding device can reliably perform the capturing operation.

  The pneumatic spinning machine preferably has the following configuration. That is, the draft device performs drafting under the starting draft condition during yarn discharge spinning, and then performs drafting under the normal draft condition. After the draft condition is changed from the start draft condition to the normal draft condition, the opening / closing part is switched from the open state to the closed state.

  Thereby, even if the yarn breakage occurs when the draft condition is changed, the spun yarn with the yarn breakage can be removed by the suction unit.

  The pneumatic spinning machine preferably has the following configuration. That is, the upstream end of the fiber travel path of the draft device is arranged closer to the operator passage than the downstream end of the fiber travel path of the pneumatic spinning device. The yarn drawing device is disposed on the opposite side of the worker passage with the pneumatic spinning device interposed therebetween.

  As a result, even if the pneumatic spinning device and the yarn drawing device are arranged at positions away from the operator passage, and the configuration in which it is difficult to visually check the accumulation state of the fiber waste, the fiber waste can be automatically removed by the suction portion. .

  The pneumatic spinning machine preferably has the following configuration. That is, the pneumatic spinning machine includes a yarn monitoring device that is disposed between the pneumatic spinning device and the yarn drawing device in a fiber traveling path and monitors the spun yarn. The suction port is disposed below the fiber travel path between the yarn monitoring device and the yarn drawing device.

  Thereby, generation | occurrence | production of the monitoring failure by a yarn monitoring apparatus detecting fiber waste can be prevented. Further, since the suction port is disposed below the fiber travel path, the suction port can be disposed while preventing interference with the fiber travel path. Further, the spun yarn (yarn waste) that has failed to be captured by the first guide device and has fallen downward due to gravity is easily sucked by the suction portion.

  The pneumatic spinning machine preferably has the following configuration. That is, the pneumatic spinning machine includes a yarn monitoring device that is disposed between the yarn drawing device and the winding device in the fiber traveling path and monitors the spun yarn. The suction port is disposed below the fiber travel path between the pneumatic spinning device and the yarn drawing device.

  Accordingly, the suction unit removes the fiber waste, and the yarn waste is less likely to get entangled with the spun yarn, so that the number of yarn defects detected by the yarn monitoring device can be reduced. As a result, the number of times package formation is interrupted to remove yarn defects can be reduced, and the operating efficiency of the pneumatic spinning machine can be improved. Further, since the suction port is disposed below the fiber travel path, the suction port can be disposed while preventing interference with the fiber travel path. Further, the spun yarn (yarn waste) that has failed to be captured by the first guide device and has fallen downward due to gravity is easily sucked by the suction portion.

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 yarn storage device and a suction part. The timing chart which shows the timing which an opening-and-closing part switches opening and closing of a suction port. The side view which shows a mode when performing cleaning operation. The side view which shows a mode when the guide apparatus is catching the thread | yarn. The side view which shows a mode when a guide apparatus guides a spun yarn to a yarn splicing apparatus. The side view which shows a mode that the 1st guide apparatus failed to capture | acquire the spun yarn, and the suction part is sucking this spun yarn. The side view which shows the structure of the spinning unit which concerns on a modification.

  Next, a spinning machine (pneumatic 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 fibers (specifically, the sliver 15, the fiber bundle 8, and the spun yarn 10). Further, in the description of the positional relationship of the devices arranged along the fiber traveling path, the arrangement between A and B on the fiber traveling path is simply described as being disposed between A and B, etc. Sometimes.

  The spinning machine includes a large number of spinning units 2 arranged side by side and an unillustrated machine base control device that centrally manages the spinning units 2. Each spinning unit 2 produces a spun yarn 10 by spinning the fiber bundle 8 sent from the draft device 7 by the air spinning device 9, and winds the spun yarn 10 by the take-up device 26 to form a package 50. To do. In addition, an operator passage 4 through which an operator passes is formed on the opposite side of the yarn accumulating device 22 across the pneumatic spinning device 9 (the end near the draft device 7, the right side in FIG. 1). Yes.

  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 device 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. Alternatively, a unit controller may be provided for each predetermined number of spinning units 2.

  The draft device 7 sandwiches and feeds the supplied sliver 15 between a plurality of draft rollers (bottom rollers) and a plurality of opposing rollers (top rollers), whereby a predetermined fiber amount (or thickness) is obtained. The fiber bundle 8 is drawn (drafted) until it becomes. The draft device 7 includes four draft rollers, a back roller 16, a third roller 17, a middle roller 19, and a front roller 20, in order from the upstream side. A rubber apron belt 18 is wound around the middle roller 19. 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 this embodiment, each draft roller provided in one spinning unit 2 is driven by an individual driving unit, and the rotational speed of each draft roller can be individually changed. Thereby, draft conditions (specifically draft ratio, draft speed, etc.) can be changed. For example, the draft device 7 makes the draft conditions different between yarn spinning and normal spinning, which will be described later. Instead of a configuration in which a driving unit is provided for each draft roller of one spinning unit 2, at least two draft rollers provided in one spinning unit 2 may be driven by the same driving unit. For example, the back roller 16 and the third roller 17 may be driven by the same drive unit. In the present embodiment, the driving unit of each draft roller is provided for each spinning unit 2, but a common driving unit may be used for a plurality of spinning units 2.

  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 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 air spinning device 9 injects air from the first nozzle 33 into the spinning chamber 32 and causes a swirling air flow to act on the fiber bundle 8 in the spinning chamber 32. The guide needle 31b may be omitted, and the downstream end of the fiber guide 31 may have the function of the guide needle 31b.

  The hollow guide shaft body 34 is a cylindrical member, and a yarn passage 35 is formed therein. The pneumatic spinning device 9 generates a swirling air flow in the yarn passage 35 by injecting air into the yarn passage 35 from the second nozzle 36. 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 pneumatic spinning device 9 configured as described above is capable of performing yarn discharge spinning and normal spinning. Yarn spinning is a spinning operation performed when the pneumatic spinning device 9 starts or resumes the production of the spun yarn 10. The normal spinning is a spinning operation that continuously generates the spun yarn 10 wound by the winding device 26 after the yarn discharge spinning.

  When performing yarn discharge spinning, first, air is not injected from the first nozzle 33, but air is injected from 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 fiber bundle 8 is sent to the hollow guide shaft body 34.

  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. The fiber bundle 8 is discharged from the hollow guide shaft 34 while being spun into a bundled fiber by the air jetted from the first nozzle 33 and the second nozzle 36.

  Normal spinning is performed after spinning out the yarn. When performing normal spinning, air is ejected from the first nozzle 33 and air is not ejected from the second nozzle 36. Therefore, 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 body 34 by the swirling air flow in the spinning chamber 32 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 pneumatic spinning device 9 can produce the spun yarn 10 by twisting the fiber bundle 8 during yarn discharge spinning and normal spinning.

  A first guide 61 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. Further, a sensor for detecting the tension of the spun yarn 10 may be disposed between the pneumatic spinning device 9 and the yarn accumulating device 22. The sensor for detecting the tension may be omitted.

  A yarn storage device 22 is provided downstream of the first guide 61. The yarn accumulating device 22 is supported by the frame 6. The yarn storage device 22 pulls the spun yarn 10 from the pneumatic spinning device 9. The yarn storage device 22 includes a yarn storage roller 41, an electric motor 42 that rotationally drives the yarn storage roller 41, and a yarn hooking member 43. When the spun yarn 10 is wound around the outer peripheral surface of the yarn accumulating roller 41, the spun yarn 10 is temporarily stored.

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

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

  In the vicinity of the yarn storage device 22, a yarn amount detection sensor 44 and a suction unit 70 are arranged. The yarn amount detection sensor 44 is an optical sensor, and detects a storage amount of the spun yarn 10 stored in the yarn storage device 22.

  The suction unit 70 is supported by the frame 6 similarly to the yarn storage device 22. As shown in FIG. 3, a suction port 71 is formed in the suction unit 70. The suction part 70 is fixed to the frame 6. The position of the suction port 71 is also fixed. The suction port 71 is connected to a blower (not shown), and a suction flow can be generated from the suction port 71. As a result, fiber waste existing around the suction port 71 (specifically, the yarn waste that is the spun yarn 10 for which the first guide device 27 has failed to capture the yarn end, and the air spinning device 9 during yarn discharge spinning). Can be sucked. The fiber waste sucked from the suction port 71 is removed through the removal passage 74. The removal passage 74 is connected to the blower via a main duct arranged along the direction in which the spinning units 2 are arranged side by side. Each removal passage 74 and the main duct may be connected via a sub-duct provided for each predetermined number of removal passages 74. A sub blower may be provided for the sub duct. The removed fiber waste is collected in a collection unit provided downstream of the main duct.

  An opening / closing portion 73 is provided in the removal passage 74. The opening / closing part 73 has a shutter structure, and is in an open state in which the removal passage 74 is opened and a suction flow is generated in the suction port 71, and in which the removal passage 74 is closed and a suction flow is not generated in the suction port 71. The state can be switched. Specifically, the opening / closing unit 73 is switched between an open state and a closed state by moving the shutter structure by a drive unit such as an electric motor or a cylinder. The opening / closing part 73 is provided not in the suction port 71 but in the removal passage 74 on the downstream side thereof. Therefore, it is possible to prevent the fiber waste existing near the suction port 71 from being sandwiched between the opening / closing part 73 and the removal passage 74 when the opening / closing part 73 is switched from the open state to the closed state. Details of the switching timing of the open / close state of the open / close unit 73 will be described later.

  The fiber waste that is mainly removed by the suction unit 70 is yarn waste, fluff, etc. sent from the air spinning device 9. More specifically, the spun yarn 10 delivered from the pneumatic spinning device 9 is captured by a first guide device 27 described later and is spliced to the spun yarn 10 of the package 50 by the yarn splicing device 23. When the device 27 fails to capture the spun yarn 10, the spun yarn 10 becomes yarn waste. Further, there is a fluff generated during spinning in the air spinning device 9, and this fluff may be discharged from the downstream end (exit) of the air spinning device 9. The suction unit 70 also removes fiber scraps other than these (for example, fluff that has dropped from above, yarn waste thrown into the suction port 71 by the operator).

  Around the suction port 71, a suction guide part 72 for guiding fiber waste to the suction port 71 is provided. The suction guide portion 72 is a portion formed so as to extend from the suction port 71 to the upstream side in the suction flow direction (air spinning device 9 side). The suction guide portion 72 is configured such that an upper portion is open and a wall surface is formed in other portions. The suction guide portion 72 has a shape in which the interval between the wall surfaces becomes narrower (the cross-sectional area of the space becomes smaller) as it approaches the suction port 71 (as it approaches the downstream side of the suction flow).

  As shown in FIG. 1, the suction port 71 is located below the downstream end (exit) of the pneumatic spinning device 9. In other words, the suction port 71 is positioned below the fiber travel path (yarn path) between the pneumatic spinning device 9 and the yarn storage device 22. Accordingly, the fiber waste is directed to the suction port 71 from above (to be precise, obliquely upward). Since the suction guide portion 72 has a shape with an open top, it can appropriately guide the fiber waste falling from obliquely upward to the suction port 71.

  The suction port 71 is provided such that its axial direction is along the fiber travel path. Specifically, the axial direction of the suction port 71 and the fiber travel path are substantially parallel. In other words, the axial direction of the suction port 71 is close to parallel rather than perpendicular to the fiber travel path. The suction port 71 is configured not to suck the spun yarn 10 from the radial direction but from the longitudinal direction. The suction port 71 is configured to suck the yarn waste that has fallen by hitting the suction guide portion 72 and the frame 6 or the like.

  The fiber traveling path on the upstream side of the yarn storage device 22 (specifically, on the upstream side of the first guide 61) is substantially horizontal with respect to the installation surface of the spinning machine. The fiber travel path on the downstream side of the yarn storage device 22 (specifically, on the downstream side of the second guide 62) is formed so as to face obliquely upward. Therefore, the fiber travel path during winding of the spun yarn 10 is largely bent (90 ° or more) by the yarn storage device 22.

  The suction unit 70 is disposed between the pneumatic spinning device 9 and the yarn accumulating device 22 and further closer to the yarn accumulating device 22 than the central position between the pneumatic spinning device 9 and the yarn accumulating device 22. . That is, the suction part 70 is provided in the vicinity of the location where the fiber travel path is largely bent.

  In this layout, among the draft device 7, the air spinning device 9, the yarn storage device 22, the yarn monitoring device 25, and the winding device 26, the device that is disposed farthest from the worker passage 4 in plan view is the yarn storage device 22. It is. Therefore, since the vicinity of the yarn storage device 22 is difficult to visually confirm, it is difficult to confirm the accumulation state of the fiber waste. In the present embodiment, since the suction portion 70 is provided in the vicinity of the yarn accumulating device 22, fiber waste that is difficult to visually confirm can be automatically removed.

  Above the suction part 70, both a substantially horizontal fiber travel path from the draft device 7 to the yarn storage device 22 and an oblique fiber travel path from the yarn storage device 22 to the winding device 26 are positioned. doing. Therefore, the amount of fiber waste falling from above tends to increase. By providing the suction portion 70 at this position, not only the fiber waste from the pneumatic spinning device 9 but also fiber waste generated in other portions can be removed.

  A second guide 62 that restricts the movement 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. The yarn splicing device 23 is not limited to the splicer device, and for example, a mechanical knotter or the like can be employed. The yarn splicing device 23 is independent of the pneumatic spinning device 9. Therefore, the yarn joining device 23 is different from the configuration in which the upstream fiber bundle and the downstream yarn end are guided to the spinning device and the yarn joining is performed in the spinning device.

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

  The root portion of the first guide device 27 is rotatably supported, and the first guide device 27 can rotate in the vertical direction with this root portion as a rotation center. The first guide device 27 is formed in a hollow shape and is connected to a blower (not shown), and can generate a suction air flow. The first guide device 27 can capture the yarn end of the first yarn by rotating downward (see FIG. 6). The first guide device 27 can guide the first yarn to the yarn joining device 23 by rotating upward after capturing the first yarn. The first guide device 27 may or may not have a twisting function.

  A root portion of the second guide device 28 is rotatably supported, and the second guide device 28 can rotate in the vertical direction with the root portion as a rotation center. The second guide device 28 is also formed in a hollow shape and is connected to a blower (not shown), and can generate a suction air flow. The second guide device 28 can capture the yarn end of the second yarn by rotating upward (see the chain line in FIG. 1). The second guide device 28 can guide the second yarn to the yarn joining device 23 by rotating downward after capturing the second yarn.

  By driving the yarn joining device 23 in a state where the first yarn and the second yarn are guided to the yarn joining device 23, the first yarn (spun yarn 10 generated by normal spinning) and the second yarn are joined. Then, the spun yarn 10 is brought into a continuous state between the air spinning device 9 and the package 50. 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 light transmission 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 a light transmission type sensor, and may monitor the thickness of the spun yarn 10 with a capacitance type sensor, for example. You may monitor the foreign material contained in the spun yarn 10 as a yarn defect. The yarn monitoring device 25 may monitor whether yarn breakage has occurred. The cutter 24 may be provided in the yarn monitoring device 25. The spun yarn 10 may be cut by omitting the cutter 24 and stopping the spinning by the pneumatic spinning device 9. When the spinning is interrupted due to yarn breakage and / or yarn cutting, the rotation of the yarn accumulating roller 41 is decelerated and stopped after the spinning by the pneumatic spinning device 9 is stopped.

  A winding device 26 is disposed downstream of the yarn storage device 22. The winding device 26 is provided at a position higher than the upstream end of the draft device 7. The winding device 26 includes a cradle arm 52 and a winding drum 53. The fiber travel path from the yarn storage device 22 to the winding device 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 be rotated with its root portion as the 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 device 26 can form the package 50 by winding the spun yarn 10 around the winding tube 51 while traversing.

  Next, the flow of the yarn splicing will be described together with the timing for switching the open / close state of the open / close portion 73. 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. The processing shown below is performed by the unit controller, but at least part of the processing may be performed by another device (for example, a machine control device).

  FIG. 4 shows whether air is ejected from the first nozzle 33 (ON or OFF), whether air is ejected from the second nozzle 36 (ON or OFF), and whether the draft condition is a normal draft condition. The start draft condition (draft condition during yarn discharge spinning) and whether the opening / closing part 73 is in the open state or the closed state are described. The horizontal axis in FIG. 4 is time. FIG. 4 shows a processing flow from when the spun yarn 10 is in a divided state during the winding operation, spinning is stopped, cleaning operation, yarn splicing, etc. are performed, and the winding operation is started again. Has been.

  During the winding operation, since normal spinning is performed, air is injected from the first nozzle 33 as described above, but air is not injected from the second nozzle 36. Since normal spinning is performed, draft is performed under normal draft conditions. Since there is a low possibility that the main removal target of the suction part 70 exists in the vicinity of the suction port 71, the opening / closing part 73 is in a closed state. In this embodiment, in order to save energy required for the generation of suction flow, the opening / closing part 73 is in a closed state during the winding operation, but by opening and closing the opening / closing unit 73 during the winding operation, the fiber waste May be removed.

  When the spun yarn 10 is in a divided state during winding of the package 50 (specifically, when the yarn breakage occurs or when the spun yarn 10 is cut by the cutter 24), the winding device 26 uses the package 50. , The draft device 7 stops drafting the fiber bundle 8, and the pneumatic spinning device 9 stops spinning. The first guide 61 moves to a position away from the yarn storage device 22.

  Thereafter, as shown in FIG. 5, after the nozzle block 30 and the hollow guide shaft 34 of the pneumatic spinning device 9 are separated from each other, the air spinning device 9 is cleaned by injecting air from the first nozzle 33. . By performing the cleaning operation, fluff may be discharged from the air spinning device 9, and the opening / closing part 73 is switched from the closed state to the open state in order to remove this. In the present embodiment, the opening / closing part 73 is switched from the closed state to the opened state simultaneously with the detection of the yarn breakage and / or the cutting of the spun yarn 10. However, if the opening / closing part 73 is switched to the opened state at the start of the cleaning operation. good. Even if the cleaning operation is not performed, the fluff generated at this timing can be removed by opening the opening / closing portion 73 at least temporarily after the spinning is stopped and before the start of the yarn discharge spinning.

  After completion of the cleaning operation (stop of air injection from the first nozzle 33), the nozzle block 30 of the pneumatic spinning device 9 and the hollow guide shaft body 34 are brought close to each other and returned to their original positions. Thereafter, yarn spinning is started. Along with this, the injection of air from the second nozzle 36 is started. Furthermore, the draft device 7 resumes the draft under the start draft condition. In order to prevent the suction flow generated by the suction unit 70 from affecting the yarn discharge spinning, the opening / closing unit 73 is switched from the open state to the closed state before the start of the yarn discharge spinning.

  As shown in FIG. 6, the second guide device 28 captures the second yarn by rotating upward before or after the start of yarn discharge spinning. Thereafter, the second guide device 28 rotates downward while capturing the second yarn, thereby guiding the second yarn to a position where the yarn joining device 23 can perform the yarn joining.

  Before the start of yarn discharge spinning, the first guide device 27 rotates downward to move to a position where the first yarn can be captured. Then, when the pneumatic spinning device 9 generates the first yarn by the yarn discharging spinning, the first yarn is sucked and captured by the first guide device 27 as shown in FIG. When the first guide device 27 catches the first yarn, even if the first guide device 27 cannot catch the yarn end of the first yarn sent from the pneumatic spinning device 9, the first yarn When the first guide device 27 captures the midway portion, the yarn end of the first yarn may be captured by the first guide device 27 as a result.

  If the opening / closing part 73 is always open, when the first guide device 27 fails to catch the yarn end of the first yarn, the yarn end is sucked into the suction unit 70, and the first guide device 27. May not be able to be caught even if the middle part of the first yarn is sucked. That is, by always opening and closing the opening / closing part 73, the probability that the first guide device 27 succeeds in capturing the first yarn is reduced. In the present embodiment, the opening / closing part 73 is in a closed state at the start of yarn discharge spinning, and the opening / closing part 73 is opened after a certain period of time has elapsed (for example, before the first guide device 27 rotates upward). Switch to state. Thereby, the fall of the success probability of the 1st thread | yarn by the 1st guide apparatus 27 can be prevented. The start time of yarn discharge spinning is, for example, the time when air starts to be ejected from the second nozzle 36 or the time when the back roller 16 starts to be driven in the draft direction.

  Thereafter, after air is injected from the first nozzle 33, the first guide device 27 rotates upward while sucking the first yarn, so that the first yarn can be spliced by the splicing device 23. To guide. Thereby, as shown in FIG. 7, the first yarn and the second yarn are guided to the yarn joining device 23. When the first guide device 27 fails to capture the first yarn, the draft of the draft device 7 and the spinning of the pneumatic spinning device 9 are stopped, and the first spinning device 9 sent out by the pneumatic spinning device 9 as shown in FIG. The yarn is sucked and removed by the suction unit 70.

  After the first yarn and the second yarn are guided to the yarn joining device 23, the first guide 61 moves so as to approach the yarn accumulating device 22, so that the first guide 61 captures the spun yarn 10 and The spun yarn 10 is guided to the vicinity of the yarn storage device 22. Thereafter, normal spinning is started. Specifically, after the yarn end is guided by the first guide device 27 and the second guide device 28, normal spinning is started. That is, the injection of air from the second nozzle 36 is stopped, and the draft condition is changed from the start draft condition to the normal draft condition. When the draft condition is changed, yarn breakage may occur. To make it easier to suck the spun yarn 10 when the yarn breakage occurs, the opening / closing part 73 is open at the time of changing the draft condition. And after change of draft conditions, the opening-and-closing part 73 is switched from an open state to a closed state. Thereafter, the winding operation is resumed when the yarn joining by the yarn joining device 23 is completed.

  Next, a modification of the above embodiment will be described. In the description of this modification, the same or similar members as those of the above-described embodiment may be denoted by the same reference numerals in the drawings, and description thereof may be omitted.

  In this modification, the arrangement of the cutter 24 and the yarn monitoring device 25 is different from that in the above embodiment. Specifically, in the spinning unit 2 of the above embodiment, the cutter 24 and the yarn monitoring device 25 are disposed between the yarn storage device 22 and the winding device 26 (specifically, between the yarn joining device 23 and the winding device 26). Between). On the other hand, in the spinning unit 2 of the present modification, the cutter 24 and the yarn monitoring device 25 are arranged between the pneumatic spinning device 9 and the yarn storage device 22.

  In this modified example, there is a possibility that the fiber scrap of the pneumatic spinning device 9 enters the monitoring space of the yarn monitoring device 25. In this case, a defect or the like of the spun yarn 10 cannot be accurately detected. However, since the suction unit 70 is provided, the yarn monitoring device 25 can appropriately monitor the spun yarn 10.

  You may arrange | position a thread | yarn monitoring apparatus to both the position shown by the said embodiment, and the position shown by this modification. In this case, a yarn defect of the spun yarn 10 is detected by a yarn monitoring device (first yarn monitoring device) disposed between the pneumatic spinning device 9 and the yarn storage device 22, and between the yarn joining device 23 and the winding device 26. A yarn monitoring device (second yarn monitoring device) arranged in the yarn splicing device may inspect the quality of the yarn splicing.

  As described above, the pneumatic spinning machine of the present embodiment includes the draft device 7, the pneumatic spinning device 9, the yarn storage device 22, the suction unit 70, the winding device 26, the yarn joining device 23, A first guide device 27 and a second guide device 28 are provided. The draft device 7 drafts the sliver 15 with a draft roller to form a fiber bundle 8. The pneumatic spinning device 9 generates the spun yarn 10 by performing normal spinning in which the fiber bundle 8 drafted by the draft device 7 is twisted by a swirling air flow. The yarn storage device 22 pulls out the spun yarn 10 generated by the pneumatic spinning device 9. In the suction unit 70, a suction port 71 is formed in the fiber travel path between the pneumatic spinning device 9 and the yarn storage device 22. The winding device 26 is disposed at a position higher than the upstream end of the fiber travel path of the draft device 7, and forms the package 50 by winding the spun yarn 10 drawn out by the yarn storage device 22. The yarn joining device 23 performs yarn joining. The first guide device 27 captures the yarn end from the pneumatic spinning device 9 and guides it to the yarn joining device 23. The second guide device 28 captures the yarn end from the package 50 and guides it to the yarn joining device 23.

  Thereby, the fiber waste existing around the suction port 71 can be removed by the suction unit 70. Accordingly, it is possible to prevent the occurrence of yarn defects due to the above-described fiber waste being entangled with the spun yarn 10.

  In the pneumatic spinning machine of this embodiment, the pneumatic spinning device 9 includes a fiber guide 31, a nozzle block 30, and a hollow guide shaft body 34. The fiber guide 31 guides the fiber bundle 8. In the nozzle block 30, the fiber bundle 8 guided by the fiber guide 31 is introduced, and a spinning chamber 32 and a first nozzle 33 through which air for generating a swirling air flow passes are formed in the spinning chamber 32. . In the hollow guide shaft body 34, the fiber bundle 8 that has passed through the nozzle block 30 is introduced, and a yarn passage 35 and a second nozzle 36 through which air injected at least during yarn discharge spinning passes are formed. During the yarn spinning, the draft device 7 is driven in the draft direction, and air is injected from at least the second nozzle 36, whereby the fiber bundle 8 drafted by the draft device 7 is fed from the fiber guide 31 to the pneumatic spinning device 9. Captured inside.

  Even in an air spinning machine that performs yarn discharge spinning with the nozzle structure described above, fiber waste can be effectively removed by the suction unit 70.

  In the pneumatic spinning machine of the present embodiment, the suction part 70 includes an opening / closing part 73 provided in the suction port 71 or the removal passage 74 through which the suction flow flows. The open / close unit 73 opens the suction port 71 or the removal passage 74 to generate a suction flow at the suction port 71, and closes the suction port 71 or the removal passage 74 to close the suction port 71 so as not to generate a suction flow. The state can be switched.

  Thereby, since generation | occurrence | production and a stop of a suction flow are controllable, energy consumption can be suppressed, removing a fiber waste at a required timing.

  In the pneumatic spinning machine of this embodiment, the opening / closing part 73 is opened at least once after the normal spinning is stopped by the pneumatic spinning device 9 and before the start of the yarn spinning.

  Thereby, the fiber waste generated from the stop of normal spinning to the start of yarn discharge spinning can be removed by the suction unit 70.

  In the pneumatic spinning machine of this embodiment, the pneumatic spinning device 9 is configured to be able to contact and separate the nozzle block 30 and the hollow guide shaft 34. At least temporarily after the spun yarn 10 is in a divided state and before the start of yarn discharge spinning, a cleaning operation is performed in which air is injected from the first nozzle 33 with the nozzle block 30 and the hollow guide shaft 34 separated. At the same time, the opening / closing part 73 is opened at least temporarily during the cleaning operation.

  Thereby, the fiber waste generated by the cleaning operation of the air spinning device 9 can be removed by the suction unit 70.

  In the pneumatic spinning machine of the present embodiment, the opening / closing part 73 is closed after the cleaning operation is completed and before the start of yarn discharge spinning.

  Thereby, it is possible to prevent the suction flow generated by the suction unit 70 from affecting the yarn discharging spinning, and the yarn discharging spinning can be performed with high accuracy.

  In the pneumatic spinning machine of the present embodiment, the opening / closing part 73 is in a closed state at the start of yarn discharge spinning.

  Thereby, it is possible to prevent the suction flow generated by the suction unit 70 from interfering with the capturing operation by the first guide device 27, and the first guiding device can reliably perform the capturing operation.

  In the pneumatic spinning machine of the present embodiment, the draft device 7 performs drafting under the start draft condition during yarn discharge spinning, and then performs drafting under the normal draft condition. After the draft condition is changed from the start draft condition to the normal draft condition, the opening / closing part 73 is switched from the open state to the closed state.

  Thereby, even if the yarn breakage occurs when the draft condition is changed, the spun yarn 10 with the yarn breakage can be removed by the suction unit 70.

  In the pneumatic spinning machine of the present embodiment, the upstream end of the fiber travel path of the draft device 7 is disposed closer to the worker passage 4 than the downstream end of the fiber travel path of the air spinning device 9. The yarn storage device 22 is disposed on the opposite side of the worker passage 4 with the pneumatic spinning device 9 interposed therebetween.

  As a result, even if the pneumatic spinning device 9 and the yarn storage device 22 are arranged at positions away from the operator passage 4 and it is difficult to visually check the accumulation state of the fiber waste, the suction portion 70 automatically removes the fiber waste. Can be removed.

  The pneumatic spinning machine of this embodiment includes a yarn monitoring device 25 that is disposed between the pneumatic spinning device 9 and the yarn storage device 22 in the fiber travel path and monitors the spun yarn 10. The suction port 71 is disposed below the fiber travel path between the yarn monitoring device 25 and the yarn storage device 22.

  Thereby, generation | occurrence | production of the monitoring failure by the yarn monitoring apparatus 25 detecting fiber waste can be prevented. Since the suction port 71 is disposed below the fiber travel path, the suction port 71 can be disposed while preventing interference with the fiber travel path. Further, the spun yarn 10 (thread waste) that has failed to be captured by the first guide device 27 and has fallen downward due to gravity is easily sucked by the suction portion 70.

  The pneumatic spinning machine according to the modified example includes a yarn monitoring device 25 that is disposed between the yarn accumulating device 22 and the winding device 26 in the fiber traveling path and monitors the spun yarn 10.

  As a result, the suction unit 70 removes the fiber waste, so that the yarn waste is less likely to get entangled with the spun yarn 10 and the number of yarn defects is reduced. Therefore, the number of yarn defects detected by the yarn monitoring device 25 can be reduced. Since the suction port 71 is disposed below the fiber travel path, the suction port 71 can be disposed while preventing interference with the fiber travel path. Further, the spun yarn 10 (thread waste) that has failed to be captured by the first guide device 27 and has fallen downward due to gravity is easily sucked by the suction portion 70.

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

  In the above embodiment, the suction port 71 is disposed closer to the yarn storage device 22 than the pneumatic spinning device 9, but may be disposed closer to the pneumatic spinning device 9. The suction port 71 may be disposed at both a position closer to the yarn accumulating device 22 than the pneumatic spinning device 9 and a position closer to the pneumatic spinning device 9. The suction unit 70 is not limited to the configuration supported by the same frame 6 as the yarn storage device 22, and may be configured to be supported by another member.

  In the above embodiment, the opening / closing part 73 is provided in the removal passage 74, but may be provided in the suction port 71.

  In the above-described embodiment, the spun yarn 10 generated by the pneumatic spinning device 9 is pulled out by the yarn accumulating device 22. However, instead of the yarn accumulating device 22, a delivery roller and a nip roller may be provided to pull out the spun yarn 10. good. In this case, the delivery roller and the nip roller correspond to the yarn drawing device. Alternatively, a delivery roller and a nip roller may be provided between the air spinning device 9 and the yarn storage device 22. Also in this case, the delivery roller and the nip roller correspond to the yarn drawing device. In this case, a pneumatic slack tube may be provided as the yarn storage device 22 instead of the yarn storage roller 41.

  In the above embodiment, the fiber travel path is largely bent by the yarn accumulating device 22, but each device is arranged so that the fiber travel path from the upstream end of the draft device 7 to the winding device 26 is not significantly bent. May be. In this case, for example, the fiber travel path of the draft device 7 is provided substantially perpendicular to the installation surface of the spinning unit 2.

  In the above embodiment, the first guide device 27, the second guide device 28, and the yarn joining device 23 are provided in each spinning unit 2, but the first guide device 27, the second guide device 28, Alternatively, the yarn splicing device 23 may be provided on a movable carriage and shared by a predetermined number of spinning units 2.

2 Spinning unit 7 Draft device 9 Pneumatic spinning device 22 Yarn storage device (yarn drawing device)
26 Winding device 70 Suction part 71 Suction port 72 Suction guide part 73 Opening / closing part 74 Removal passage

Claims (11)

A draft device that drafts a sliver with a draft roller to form a fiber bundle;
An air spinning device for producing a spun yarn by performing normal spinning for twisting the fiber bundle drafted by the draft device by a swirling air flow;
A yarn drawing device for drawing out the spun yarn generated by the pneumatic spinning device;
A suction part in which a suction port is formed with respect to a fiber traveling path between the pneumatic spinning device and the yarn drawing device;
A winding device that is disposed at a position higher than the upstream end of the fiber travel path of the draft device, and winds up the spun yarn drawn by the yarn drawing device to form a package;
A yarn joining device for performing yarn joining;
A first guide device for capturing a yarn end from the pneumatic spinning device and guiding the yarn end to the yarn joining device;
A second guide device for capturing a yarn end from the package and guiding the yarn end to the yarn joining device;
An air spinning machine characterized by comprising: The pneumatic spinning machine according to claim 1,
The pneumatic spinning device is
A fiber guide for guiding the fiber bundle;
A nozzle block in which the fiber bundle guided by the fiber guide is introduced, a spinning chamber and a first nozzle through which air for generating a swirling air flow passes are formed;
A hollow guide shaft body in which the fiber bundle that has passed through the nozzle block is introduced, and a second passage is formed through which a yarn passage and air that is injected at the time of spinning out the yarn pass.
With
An air spinning machine characterized in that, during yarn spinning, the draft device is driven in the draft direction and air is injected from at least the second nozzle. The pneumatic spinning machine according to claim 2,
The suction part includes an opening / closing part provided in the suction port or a removal passage through which a suction flow flows,
The open / close section opens the suction port or the removal passage to generate a suction flow in the suction port, and closes the suction port or the removal passage to close the suction port so that no suction flow is generated. A pneumatic spinning machine characterized by being able to switch between states. The pneumatic spinning machine according to claim 3, wherein
An air spinning machine characterized in that the opening / closing part is opened at least once after the normal spinning by the pneumatic spinning device is stopped and before the start of yarn discharge spinning. The pneumatic spinning machine according to claim 4, wherein
The pneumatic spinning device is configured to be able to contact and separate the nozzle block and the hollow guide shaft body,
A cleaning operation is performed in which air is injected from the first nozzle in a state where the nozzle block and the hollow guide shaft body are separated from each other at least once after the spun yarn is in a divided state and before the start of yarn discharge spinning. The pneumatic spinning machine is characterized in that the opening / closing section is opened at least temporarily during the cleaning operation. The pneumatic spinning machine according to claim 5, wherein
An air spinning machine characterized in that the opening / closing portion is switched to a closed state after the cleaning operation is completed and before the start of yarn discharge spinning. The pneumatic spinning machine according to any one of claims 3 to 6,
An air spinning machine characterized in that the opening / closing portion is in a closed state at the start of yarn discharge spinning. The pneumatic spinning machine according to any one of claims 3 to 7,
The draft device performs drafting under start draft conditions during yarn discharge spinning, and then performs drafting under normal draft conditions,
An air spinning machine characterized in that after the draft condition is changed from the start draft condition to the normal draft condition, the opening / closing part is switched from an open state to a closed state. The pneumatic spinning machine according to any one of claims 1 to 8,
The upstream end of the fiber travel path of the draft device is disposed closer to the operator passage than the downstream end of the fiber travel path of the pneumatic spinning device,
The pneumatic spinning machine, wherein the yarn drawing device is disposed on the opposite side of the worker passage with the pneumatic spinning device interposed therebetween. The pneumatic spinning machine according to any one of claims 1 to 9,
In a fiber traveling path, the yarn traveling device is disposed between the pneumatic spinning device and the yarn drawing device, and includes a yarn monitoring device that monitors the spun yarn,
The pneumatic spinning machine according to claim 1, wherein the suction port is disposed below a fiber travel path between the yarn monitoring device and the yarn drawing device. The pneumatic spinning machine according to any one of claims 1 to 9,
In a fiber traveling path, the yarn traveling device is disposed between the yarn drawing device and the winding device, and includes a yarn monitoring device that monitors the spun yarn,
The pneumatic spinning machine according to claim 1, wherein the suction port is disposed below a fiber traveling path between the pneumatic spinning device and the yarn drawing device.

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