JP2013067484A - Spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning machine in which a spun yarn does not slack in a series of processes after formation of a package is interrupted and until the formation of the package is resumed.SOLUTION: A spinning machine 100 includes a plurality of spinning units 10 each winding a spun yarn Y to form a package P. The spinning machine includes: a driving roller 61 that comes into contact with the package P to rotate the package P in a winding direction; a cradle 62 that moves the package P to a contacting position and a spaced-apart position with respect to the driving roller 61; a reverse-rotation roller 22 that comes into contact with the package P to rotate the package P in an unwinding direction that is in an opposite direction of the winding direction; a driving section 23 that moves the reverse-rotation roller 22 to a contacting position and a spaced-apart position with respect to the package P; and a control section 40 that controls the driving section 23 to move the reverse-rotation roller 22 to the spaced-apart position with respect to the package P immediately before the package P is in the contact position with respect to the driving roller 61 by moving the package P by the cradle 62.

Description

  The present invention relates to a spinning machine technology.

  2. Description of the Related Art Conventionally, a spinning unit that produces a spun yarn by drafting a fiber bundle and twisting the drafted fiber bundle is known (for example, see Patent Document 1). The spinning unit is provided with a winding unit that winds the spun yarn to create a package. The winding unit includes a driving roller that rotates the package in the forward direction and a cradle that rotatably supports the package.

  Conventionally, a spinning machine including a plurality of spinning units is known (see, for example, Patent Document 2). The spinning machine is provided with a work carriage that travels to the spinning unit to perform the yarn splicing work when the continuous state of the spun yarn is divided by one spinning unit. The work carriage includes a braking unit that can brake the rotation of the package, a reverse rotation roller that rotates the package in the unwinding direction that is opposite to the winding direction, a guide unit that captures and guides the spun yarn, and the spun yarn And a yarn splicing portion for joining the yarn ends together.

  The spinning unit rotates the cradle when the continuous state of the spun yarn is broken, and separates the package from the drive roller. After the rotation of the package is stopped by the braking unit, the work carriage contacts the reverse rotation roller with the package to rotate the package in the unwinding direction (hereinafter, simply referred to as “reverse rotation”). The work carriage captures the spun yarn by the guide unit and guides the spun yarn to a predetermined position, and splices the yarn ends of the spun yarn by the yarn splicing unit. Thereafter, the spinning unit moves the cradle again to bring the package into contact with the driving roller. Through such a series of steps, the spinning unit can resume the creation of the package.

  However, in such a series of steps, the timing for separating the reverse rotation roller from the package is important. This is because when the reverse rotation roller is separated from the package, the package may unintentionally reverse as the reverse rotation roller moves. For this reason, when the reverse rotation roller is separated from the package immediately after the spun yarn is spliced by the yarn splicing portion, the spun yarn may be loosened due to the reverse rotation of the package unintentionally.

JP 2011-99192 A JP 2011-84854 A

  An object of the present invention is to provide a spinning machine in which spun yarn does not loosen in a series of steps from when package creation is suspended to when package creation is resumed.

  Next, means for solving this problem will be described.

  The first invention relates to a spinning machine including a plurality of spinning units for winding a spun yarn to create a package. A spinning machine according to an embodiment of the present invention includes a drive roller that contacts a package and rotates the package in a winding direction, a cradle that moves the package to a contact position and a separation position with respect to the drive roller, and a contact with the package A reversing roller that rotates the package in an unwinding direction that is opposite to the winding direction, a drive unit that moves the reversing roller to a contact position and a separation position with respect to the package, and a package that is moved by a cradle. And a control unit that controls the drive unit so that the reverse rotation roller is moved to the separation position with respect to the package immediately before the package comes into contact with the drive roller.

  The second invention relates to the spinning machine according to the first invention. The control unit of the present embodiment controls the drive unit so that the contact pressure between the reverse rotation roller and the package at the contact position is substantially constant independently of the outer diameter of the package.

  The third invention relates to a spinning machine according to the first or second invention. The drive part of this embodiment is an air actuator.

  A fourth invention relates to a spinning machine according to any one of the first to third inventions. A spinning machine according to an embodiment of the present invention includes a work carriage that travels to a spinning unit to perform a yarn splicing operation when the continuous state of the spun yarn is divided in one spinning unit. The working carriage of this embodiment includes a reverse roller, a drive unit, a braking unit that can brake the rotation of the package, a guide unit that captures and guides the divided spun yarn, and yarn ends of the divided spun yarn. A yarn splicing section for joining together.

  A fifth invention relates to a spinning machine according to any one of the first to fourth inventions. The spinning unit of the present embodiment includes a spinning unit that twists a fiber bundle by a swirling airflow.

  As effects of the present invention, the following effects can be obtained.

  According to the first invention, since the package comes into contact with the drive roller immediately after the reversing roller is separated from the package, the package does not rotate unintentionally. This can prevent the spun yarn from loosening.

  According to the second invention, even when the outer diameters of the packages are different, the difference in contact pressure between the reverse rotation roller and the package can be reduced. As a result, the deformation of the package and the quality deterioration of the spun yarn wound around the package can be prevented.

  According to the third aspect, it is possible to control with high accuracy the timing at which the reverse rotation roller is separated from the package. Therefore, immediately after the reverse rotation roller is separated from the package, the package comes into contact with the drive roller, so that the package does not reverse unintentionally. This can prevent the spun yarn from loosening. Further, even when the outer diameters of the packages are different, the difference in contact pressure between the reverse rotation roller and the package can be reduced. As a result, the deformation of the package and the quality deterioration of the spun yarn wound around the package can be prevented.

  According to the fourth invention, since the work carriage includes the reverse rotation roller, the drive unit, the braking unit, the guide unit, and the yarn joining unit, the configuration of each spinning unit can be simplified, and thus the configuration of the spinning machine is simplified. It becomes possible.

  According to the fifth aspect of the invention, since the spinning unit includes a spinning unit that twists the fiber bundle by the swirling airflow, the production efficiency of the spun yarn in each spinning unit can be improved, and the production efficiency of the package in the spinning machine can be improved. It becomes possible to improve.

1 is a diagram illustrating an overall configuration of a spinning machine 100. FIG. The figure which shows the structure of the spinning unit 10 and the work trolley | bogie 20. FIG. The figure which shows the process of stopping rotation of the package P. FIG. The figure which shows the process of reversing the package P. FIG. The figure which shows the process of catching the cut spun yarn Y. The figure which shows the process of guiding the divided spun yarn Y. The figure which shows the process of restarting preparation of the package P. FIG. The figure which shows the structure of the drive part. The figure which shows the operation | movement aspect of the drive part. The figure which shows the structure of the spinning part 3. FIG.

  First, the overall configuration of the spinning machine 100 will be briefly described.

  FIG. 1 is a diagram illustrating an overall configuration of the spinning machine 100. Black arrows shown in the figure indicate the traveling direction of the work carriage 20. Moreover, the white arrow shown in the figure has shown the traveling direction of the doffing cart 30. FIG.

  The spinning machine 100 is mainly composed of a plurality of spinning units 10. Further, the spinning machine 100 is provided with a work carriage 20, a doffing carriage 30, and a control unit 40.

  The spinning unit 10 can produce the spun yarn Y by drafting the fiber bundle F and twisting the drafted fiber bundle F. Further, the spinning unit 10 can create the package P by winding the spun yarn Y. The detailed configuration of the spinning unit 10 will be described later.

  The work carriage 20 can travel along the rail R1 extending in the direction in which the spinning units 10 are arranged. When the continuous state of the spun yarn Y is divided by one spinning unit 10, the work carriage 20 travels to the spinning unit 10 and performs a yarn splicing operation. The detailed configuration of the work cart 20 will be described later.

  The doffing cart 30 can travel along the rail R2 that extends in the direction in which the spinning units 10 are arranged. The doffing cart 30 can travel to the spinning unit 10 and collect the package P when the package P is fully wound in one spinning unit 10. Further, the doffing cart 30 can attach a new bobbin B to the spinning unit 10. Note that the doffing cart 30 may be configured to perform only the operation of collecting the package P that has been fully wound. Further, when the operator manually collects the package P and installs a new bobbin B, the doffing cart 30 may be omitted.

  The control unit 40 can control each spinning unit 10, work cart 20, and the like. For example, when the continuous state of the spun yarn Y is divided by one spinning unit 10, the control unit 40 controls the spinning unit 10 to interrupt the creation of the package P. Then, after the control unit 40 controls the work carriage 20 to perform the yarn splicing operation, the control unit 40 controls the spinning unit 10 to resume the creation of the package P.

  Next, the configuration of the spinning unit 10 and the work cart 20 will be described in detail.

  FIG. 2 is a diagram showing the configuration of the spinning unit 10 and the work carriage 20. Black arrows in the figure indicate the feeding direction of the fiber bundle F and the spun yarn Y. Also, white arrows in the figure indicate the rotation direction of the package P.

  First, the spinning unit 10 will be described. The spinning unit 10 mainly includes a sliver supply unit 1, a draft unit unit 2, a spinning unit 3, a defect detection unit 4, a tension stabilization unit 5, along the feeding direction of the fiber bundle F and the spun yarn Y. A winding unit 6.

  The sliver supply unit 1 supplies the fiber bundle F to the draft unit unit 2. The sliver supply unit 1 includes a sliver case 11 and a sliver guide (not shown). The fiber bundle F stored in the sliver case 11 is guided by the sliver guide and guided to the draft unit unit 2.

  The draft unit unit 2 drafts the fiber bundle F to make the thickness of the fiber bundle F uniform. The draft unit unit 2 includes four pairs of draft rollers 2a and 2b including a back roller pair 2a, a third roller pair 2b, a middle roller pair 2c, and a front roller pair 2d along the feeding direction of the fiber bundle F. -It has 2c and 2d. The draft roller pairs 2a, 2b, 2c, and 2d include a bottom roller that is rotated through a power mechanism and a top roller that is driven to rotate while being in contact with the bottom roller. Further, an apron band is wound around the bottom roller and the top roller constituting the middle roller pair 2c. The draft roller pairs 2a, 2b, 2c, and 2d rotate in a state where the bottom roller and the top roller hold the fiber bundle F, so that the fiber bundle F can be sent out. For this reason, the draft unit unit 2 can draft the fiber bundle F by the difference in the feeding speed between the draft roller pairs 2a, 2b, 2c, and 2d adjacent to each other.

  The spinning unit 3 manufactures the spun yarn Y by twisting the drafted fiber bundle F. The spinning unit 3 is disposed downstream of the draft unit unit 2 in the traveling direction of the spun yarn Y. For this reason, the spinning unit 3 can produce the spun yarn Y from the fiber bundle F that has been drafted moderately. The structure of the spinning unit 3 will be described later.

  The defect detection unit 4 detects a defect part of the manufactured spun yarn Y. More specifically, the defect detection unit 4 irradiates the spun yarn Y with a light emitting diode (not shown) as a light source, and detects the amount of light reflected from the spun yarn Y. The defect detection unit 4 is connected to the control unit 40 via an analyzer (not shown). For this reason, the control unit 40 can determine the presence or absence of a defect portion based on the detection signal from the defect detection unit 4. A cutter 41 that can cut the spun yarn Y is attached in the vicinity of the defect detection unit 4. The defective part of the spun yarn Y includes a case where a part of the spun yarn Y is too thick (thick yarn) or too thin (thin yarn) and a foreign matter is present in the spun yarn Y. In addition to the optical sensor according to the present embodiment, the defect detection unit 4 can employ a capacitance type sensor or the like.

  The tension stabilizing unit 5 keeps the tension applied to the spun yarn Y moderately stable. The tension stabilizing unit 5 includes an unraveling member 51 and a roller 52. The unwinding member 51 rotates with the roller 52 when the tension applied to the spun yarn Y is low, and winds the spun yarn Y around the roller 52. The unwinding member 51 rotates independently of the roller 52 when the tension applied to the spun yarn Y is high, and unwinds the spun yarn Y wound around the roller 52. For this reason, the tension stabilizing unit 5 can keep the tension applied to the spun yarn Y moderately stable. The roller 52 is rotationally driven by a motor (not shown).

  The winding unit 6 winds the spun yarn Y and creates a package P. The winding unit 6 includes a driving roller 61 and a cradle 62. The drive roller 61 is driven to rotate by a motor (not shown), and rotates the bobbin B that is gripped by the cradle 62 so as to be rotatable. Thereby, the winding unit 6 can create the package P by winding the spun yarn Y while traversing the spun yarn Y by a traverse device (not shown).

  Next, the work cart 20 will be described. The work carriage 20 mainly includes a braking unit 21, a reverse rotation roller 22, a driving unit 23, a guide unit 24, and a yarn joining unit 25.

  The braking unit 21 can contact the package P and brake the rotation of the package P (see FIG. 3). In the present embodiment, the braking unit 21 includes a plate 21a that contacts the outer peripheral surface of the package P, and an arm 21b that supports the plate 21a. However, the braking part 21 is not limited in terms of shape, configuration, or the like as long as it can contact the package P and brake the rotation of the package P.

  The reverse rotation roller 22 contacts the package P and rotates (reverses) the package P in the unwinding direction that is opposite to the winding direction (see FIGS. 4, 5, and 6). More specifically, the reverse rotation roller 22 contacts the package P and reverses the package P after the plate 21a of the braking portion 21 is separated from the outer peripheral surface of the package P.

  The drive unit 23 rotates the reverse rotation roller 22 (see FIGS. 5 and 6). In this embodiment, the drive part 23 rotates the reverse rotation roller 22 using the electric motor 23a mentioned later. Further, the drive unit 23 can move the reverse rotation roller 22 in contact with or away from the package P (see FIGS. 4 and 7). In this embodiment, the drive part 23 moves the reverse rotation roller 22 using the air actuator 23d mentioned later. The drive unit 23 is driven based on a control signal from the control unit 40. That is, the control unit 40 can control the drive unit 23.

  The guide unit 24 can capture the cut spun yarn Y and guide it to a predetermined position (see FIGS. 5 and 6). The guide unit 24 can capture the spun yarn Y on the package P side and guide it to a predetermined position, and can guide the spun yarn Y spun from the spun unit 3 side and guide it to a predetermined position. And a second guide portion 24b. In addition, the operation | movement aspect of the 1st guide part 24a and the 2nd guide part 24b is mentioned later.

  The yarn joining portion 25 joins the yarn ends of the divided spun yarn Y (see FIG. 6). More specifically, the yarn joining section 25 joins the yarn end of the spun yarn Y guided by the first guide portion 24a and the yarn end of the spun yarn Y guided by the second guide portion 24b. Here, “the cut spun yarn Y” is a concept including the spun yarn Y cut by the cutter 41 and the spun yarn Y cut by applying an abnormal tension. The yarn splicing unit 25 may employ a mechanical splicer device or the like in addition to an air splicer device that splices the yarn ends of the spun yarn Y by a swirling airflow.

  As described above, since the work carriage 20 includes the braking unit 21, the reverse rotation roller 22, the driving unit 23, the guide unit 24, and the yarn joining unit 25, the configuration of each spinning unit 10 can be simplified. The configuration can be simplified.

  Next, a series of steps from when the spinning unit 10 interrupts the creation of the package P to when the creation of the package P is resumed will be described.

  FIG. 3 is a diagram illustrating a process of stopping the rotation of the package P. FIG. 4 is a diagram illustrating a process of reversing the package P. FIG. 5 is a diagram illustrating a process of capturing the cut spun yarn Y. FIG. 6 is a diagram showing a process of guiding the cut spun yarn Y. FIG. 7 is a diagram illustrating a process of restarting the creation of the package P. Black arrows in the figure indicate the operation directions of the members constituting the spinning unit 10 and the work carriage 20. Also, white arrows in the figure indicate the rotation direction of the package P.

  The spinning unit 10 cuts the spun yarn Y using the cutter 41 when the defect detecting unit 4 detects the defective portion of the spun yarn Y. Accordingly, one end of the divided spun yarn Y (spun yarn Y downstream from the cutter 41) is wound around the package P. Further, the other end of the cut spun yarn Y (the spun yarn Y upstream of the cutter 41) is sucked and held in a suction port provided in the vicinity of the cutter 41.

  Next, the spinning unit 10 rotates the cradle 62 to separate the package P from the drive roller 61 (see the black arrow in FIG. 3). As a result, the package P continues to rotate due to the inertial force (see the white arrow in FIG. 3). The work carriage 20 travels to the spinning unit 10 immediately after the cutter 41 cuts the spun yarn Y.

  Next, the work carriage 20 stops the rotation of the package P using the braking unit 21. Specifically, the work carriage 20 rotates the arm 21b to bring the plate 21a into contact with the outer peripheral surface of the package P (see the black arrow in FIG. 3). In this way, the work carriage 20 stops the rotation of the package P due to the friction between the package P and the plate 21a.

  Next, the work carriage 20 reverses the package P using the reverse rotation roller 22. This is because the first guide portion 24a can capture the spun yarn Y wound around the package P. First, the work carriage 20 rotates the arm 21b to separate the plate 21a from the outer peripheral surface of the package P (see the black arrow in FIG. 4). Thereafter, the work cart 20 brings the reverse roller 22 into contact with the package P to reversely rotate the package P. More specifically, the work carriage 20 moves the reverse rotation roller 22 from a separation position that is a position away from the package P to a contact position that is a position in contact with the package P (see black arrows in FIG. 4). Then, the work carriage 20 rotates the reverse rotation roller 22 to reverse the package P (see the white arrow in FIG. 4). The detailed description of the drive unit 23 will be described later.

  The control unit 40 controls the drive unit 23 so that the contact pressure between the reverse rotation roller 22 and the package P becomes substantially constant independently of the outer diameter of the package P. By doing so, even when the outer diameter of the package P is different, the difference in the contact pressure between the reverse rotation roller 22 and the package P is reduced. Thereby, the deformation | transformation of the package P and the quality deterioration of the spun yarn Y wound around the package P can be prevented.

  Next, the work carriage 20 captures the spun yarn Y that has been cut using the guide 24 and guides it to a predetermined position. More specifically, the first guide portion 24a rotates downward (downstream in the yarn traveling direction) from the standby position, and captures the spun yarn Y wound around the package P (shown in black in FIG. 5). See arrow). Then, the first guide portion 24a rotates upward while sucking and holding the spun yarn Y, and guides the spun yarn Y to a predetermined position (see the black arrow in FIG. 6). Further, the second guide portion 24b rotates upward from the standby position (upstream in the yarn traveling direction) and captures the spun yarn Y spun from the spinning portion 3 (black arrow in FIG. 5). reference). Then, the second guide portion 24b rotates downward in a state where the spun yarn Y is sucked and held, and guides the spun yarn Y to a predetermined position (see black arrows in FIG. 6).

  Next, the work carriage 20 joins the yarn end of the spun yarn Y guided to the predetermined position by the first guide portion 24a and the yarn end of the spun yarn Y guided to the predetermined position by the second guide portion 24b. .

  Thereafter, the spinning unit 10 resumes the creation of the package P. The spinning unit 10 rotates the cradle 62 to move the package P in the direction approaching the drive roller 61 (see the black arrow in FIG. 7). At this time, the work carriage 20 moves the reverse rotation roller 22 from the contact position to the separation position to separate the reverse rotation roller 22 from the package P (see the black arrow in FIG. 7). For this reason, the reverse rotation roller 22 is separated from the package P immediately before the package P contacts the driving roller 61. That is, the control unit 40 controls the driving unit 23 to separate the reverse rotation roller 22 from the package P immediately before the package P is moved by the cradle 62 and the package P and the driving roller 61 come into contact with each other.

  With this configuration, in the spinning machine 100, since the package P comes into contact with the drive roller 61 immediately after the reversing roller 22 is separated from the package P, the package P does not rotate unintentionally. Thereby, it can prevent that the spun yarn Y loosens.

  Next, the structure and operation mode of the drive unit 23 will be described in detail.

  FIG. 8 is a diagram illustrating the structure of the drive unit 23. FIG. 9 is a diagram illustrating an operation mode of the drive unit 23. Black arrows in the figure indicate the operating directions of the members constituting the drive unit 23.

  The drive unit 23 mainly includes an electric motor 23a, an arm 23b, a sub arm 23c, an air actuator 23d, and a lever 23e.

  The electric motor 23a is attached to one end of the arm 23b. In the present embodiment, the electric motor 23a is a servo motor. However, the electric motor 23a may be a stepping motor or the like, and the type is not limited.

  The arm 23b is attached so as to be rotatable about a rotation axis SH1. The arm 23b includes a first pulley 23ba and a second pulley 23bb. The first pulley 23ba is rotated by the electric motor 23a. The second pulley 23bb is rotated by a belt 23bc wound around the second pulley 23bb and the first pulley 23ba.

  The sub arm 23c is attached so as to be rotatable about a rotation axis SH2. The sub arm 23c includes a third pulley 23ca and a fourth pulley 23cb. The third pulley 23ca is attached to a second pulley 23bb built in the arm 23b. The fourth pulley 23cb is rotated by a belt 23cc wound around the fourth pulley 23cb and the third pulley 23ca. A reverse rotation roller 22 is attached to the rotation shaft of the fourth pulley 23cb.

  The air actuator 23d includes a cylinder 23da, a piston 23db, and a rod 23dc. When air sent from an air supply source (not shown) is supplied to the cylinder 23da, the piston 23db is slid in a direction approaching the package P (see FIG. 9B). Thereby, the rod 23dc attached to the piston 23db slides together with the piston 23db, and rotates the lever 23e away from the package P (see FIG. 9B). As a result, the reverse rotation roller 22 moves to a separation position that is a position away from the package P (see FIG. 9B). Further, when the air in the cylinder 23da is sucked into the negative pressure pipe (not shown), the piston 23db is slid away from the package P (see FIG. 9A). Thereby, the rod 23dc attached to the piston 23db slides together with the piston 23db, and rotates the lever 23e in a direction approaching the package P (see FIG. 9A). As a result, the reverse rotation roller 22 moves to a contact position that is a position in contact with the package P (see FIG. 9A). That is, the air actuator 23d is a reciprocating air actuator.

  The lever 23e is attached to be rotatable about the pin P1 of the rod 23dc constituting the air actuator 23d. The lever 23e is attached so as to be rotatable about a pin P2 provided on the sub arm 23c. In other words, the lever 23e has one end (first end) of the lever 23e attached to the rod 23dc, and the other end (second end) of the lever 23e attached to the sub arm 23c.

  Below, the operation | movement aspect of the drive part 23 is demonstrated. 9A shows a state where the reverse rotation roller 22 is in contact with the package P, and FIG. 9B shows a state where the reverse rotation roller 22 is separated from the package P.

  First, the operation | movement aspect at the time of making the reverse rotation roller 22 contact the package P is demonstrated using FIG. 9A.

  The control unit 40 transmits a control signal to an electromagnetic valve or the like (not shown) to suck out the air in the cylinder 23da. As a result, the piston 23db is slid, and the rod 23dc attached to the piston 23db moves in a direction to retract into the cylinder 23da. Accordingly, the air actuator 23d rotates the lever 23e attached to the rod 23dc.

  Then, the lever 23e rotates the sub arm 23c around the rotation axis SH2 and rotates the arm 23b around the rotation axis SH1. More specifically, since the sub arm 23c is pivotably mounted about the rotation axis SH2, the sub arm 23c rotates with the rotation of the lever 23e. Further, since the arm 23b is attached so as to be rotatable about the rotation axis SH1 together with the sub arm 23c, the arm 23b rotates with the rotation of the lever 23e. In this way, the driving unit 23 can move the reverse rotation roller 22 to bring the reverse rotation roller 22 into contact with the package P.

  Thereafter, the control unit 40 transmits a control signal to a relay or the like (not shown) to energize the electric motor 23a. Thereby, the rotation of the reverse rotation roller 22 is started, and the rotation of the package P in contact with the reverse rotation roller 22 is also started.

  Next, the operation | movement aspect at the time of separating the reverse rotation roller 22 from the package P is demonstrated using FIG. 9B.

  The control unit 40 transmits a control signal to a relay or the like (not shown) to cut off the power supply of the electric motor 23a. As a result, the rotation of the reverse rotation roller 22 is stopped, and the rotation of the package P that has been rotating in contact with the reverse rotation roller 22 is also stopped.

  Thereafter, the control unit 40 transmits a control signal to an electromagnetic valve (not shown) or the like to supply air to the cylinder 23da. As a result, the piston 23db is slid, and the rod 23dc attached to the piston 23db moves in the direction of advancement from the cylinder 23da. Accordingly, the air actuator 23d rotates the lever 23e attached to the rod 23dc.

  Then, the lever 23e rotates the sub arm 23c around the rotation axis SH2 and rotates the arm 23b around the rotation axis SH1. More specifically, since the sub arm 23c is pivotably mounted about the rotation axis SH2, the sub arm 23c rotates with the rotation of the lever 23e. Further, since the arm 23b is attached so as to be rotatable about the rotation axis SH1 together with the sub arm 23c, the arm 23b rotates with the rotation of the lever 23e. In this way, the drive unit 23 can move the reverse rotation roller 22 to separate the reverse rotation roller 22 from the package P.

  Thus, the drive unit 23 in the present embodiment is characterized in that the reverse rotation roller 22 is moved using the air actuator 23d.

  With such a configuration, the spinning machine 100 can control the timing at which the reverse rotation roller 22 is separated from the package P with high accuracy. Therefore, immediately after the reverse rotation roller 22 is separated from the package P, the package P can be brought into contact with the drive roller 61, so that the package P does not reverse unintentionally. Thereby, it can prevent that the spun yarn Y loosens.

  Further, the configuration in which the reverse rotation roller 22 is moved using the air actuator 23d has other advantages. That is, even when the outer diameter of the package P is different, the difference in the contact pressure between the reverse rotation roller 22 and the package P can be reduced. Thereby, the deformation | transformation of the package P and the quality deterioration of the spun yarn Y wound around the package P can be prevented.

  Next, other characteristic points of the spinning machine 100 according to the present embodiment will be described.

  In the spinning machine 100, the spinning unit 3 constituting the spinning unit 10 is a so-called pneumatic spinning device that twists the fiber bundle F by a swirling airflow.

  FIG. 10 is a diagram showing the structure of the spinning unit 3. Black arrows in the figure indicate the feeding direction of the fiber bundle F and the spun yarn Y. White arrows shown in the figure indicate the flow direction of the supplied air.

  The spinning unit 3 forms a swirling airflow in the spinning chamber SC by the airflow ejected from the nozzle block 33, and twists the fiber bundle F by the swirling airflow. The spinning chamber SC is divided into a space SC1 formed between the fiber guide 31 and the spindle 32, and a space SC2 formed between the spindle 32 and the nozzle block 33.

  In the space SC1, the fibers constituting the fiber bundle F are inverted at the rear end portion by the swirling airflow (see the two-dot chain line in FIG. 10). In the space SC2, the rear end portion of the inverted fiber is rotated by the swirling airflow (see the two-dot chain line in FIG. 10). Then, the fibers rotated by the swirling airflow are wound around the fibers in the center part one after another. In this way, the spinning unit 3 can twist the fiber bundle F and spin the spun yarn Y.

  The spinning unit 3 includes a needle 31n in the fiber guide 31. The needle 31n guides the fiber bundle F to the fiber passage 32h and prevents the twist of the fiber bundle F from being transmitted to the upstream side. However, the spinning unit 3 may have a configuration in which the fiber guide 31 does not include the needle 31n.

  Thus, since the spinning unit 10 includes the spinning unit 3 that twists the fiber bundle F by the swirling airflow, the production efficiency of the spun yarn Y in each spinning unit 10 can be improved. As a result, the package P in the spinning machine 100 can be improved. Production efficiency can be improved.

  As mentioned above, although the spinning machine 100 which concerns on one Embodiment of this invention was demonstrated, this invention is not restricted to the said embodiment, For example, said structure can be changed into the following structures.

  In the above-described embodiment, the package P is rotated in the unwinding direction by the reverse rotation roller 22, but the reverse rotation roller 22 can be omitted when the package P is reversely rotated by another means.

  In the above embodiment, the brake unit 21, the reverse roller 22, the drive unit 23, the guide unit 24, and the yarn joining unit 25 are provided in the work carriage 20, but may be provided in each spinning unit 10. Alternatively, the driving unit of the draft unit 2 and the driving unit of the winding unit 6 may be provided independently by each spinning unit 10 so that the winding operation can be performed independently by each spinning unit 10.

  In the above embodiment, the control unit 40 controls the plurality of spinning units 10, the work cart 20, and the doffing cart 30, but each spinning unit 10 is provided with a unit control unit that individually controls each spinning unit 10. Also good. In this case, the control unit 40 controls the plurality of spinning units 10.

  In the above embodiment, the spun yarn Y is cut by the cutter 41. However, by stopping the supply of air to the spinning unit 3, the production of the spun yarn Y by the spinning unit 3 is interrupted. You may make it cut | disconnect.

  In the above embodiment, the reverse roller 22 is moved by the air actuator 23d, but the reverse roller 22 may be moved by an electric motor or a cam mechanism.

  In the above embodiment, the air actuator 23d is a reciprocating air actuator, but the reverse rotation roller 22 may be moved by a single acting air actuator and a biasing member such as a spring. For example, the reverse rotation roller 22 is moved to the contact position using a single-acting air actuator, and the reverse rotation roller 22 is moved to the separation position using a biasing member such as a spring. The biasing force of the biasing member such as a spring changes depending on the displacement of the biasing member, so that the difference in contact pressure between the reverse rotation roller 22 and the package P increases depending on the outer diameter of the package P. Therefore, the air actuator 23d is preferably a backward-acting air actuator.

  In FIG. 1, the spinning machine 100 is illustrated as including one work carriage 20 and one doffing carriage 30, but a plurality of operations may be performed depending on the number of spinning units 10 included in the spinning machine 100. A bogie 20 and / or a plurality of doffing carts 30 may be provided in the spinning machine 100.

DESCRIPTION OF SYMBOLS 1 Sliver supply part 2 Draft unit part 3 Spinning part 4 Defect detection part 5 Tension stabilization part 6 Winding part 10 Spinning unit 20 Working carriage 21 Braking part 22 Reverse rotation roller 23 Drive part 23a Electric motor 23b Arm 23c Sub arm 23d Air actuator 23e Lever 24 guide section 24a first guide section 24b second guide section 25 yarn joining section 30 doffing carriage 40 control section 100 spinning machine F fiber bundle P package Y spun yarn

Claims (5)

In a spinning machine equipped with a plurality of spinning units for winding a spun yarn to create a package,
A drive roller that contacts the package and rotates the package in the winding direction;
A cradle that moves the package to a contact position and a separation position with respect to the drive roller;
A reversing roller that contacts the package and rotates the package in an unwinding direction opposite to the winding direction;
A drive unit that moves the reverse rotation roller to a contact position and a separation position with respect to the package;
A control unit that controls the drive unit to move the reverse rotation roller to a separation position with respect to the package immediately before the package is moved to the contact position with respect to the drive roller by moving the package by the cradle; A spinning machine characterized by comprising:   The said control part controls the said drive part so that the contact pressure of the said reverse rotation roller and the said package in the said contact position may become substantially constant independently of the outer diameter of the said package. The spinning machine according to 1.   The spinning machine according to claim 1 or 2, wherein the driving unit is an air actuator. Comprising a work carriage that travels to the spinning unit to perform the yarn splicing operation when the continuous state of the spun yarn is interrupted in one spinning unit;
The working carriage includes the reverse roller, the driving unit, a braking unit that can brake rotation of the package, a guide unit that captures and guides the divided spun yarn, and yarn ends of the divided spun yarn. The spinning machine according to any one of claims 1 to 3, further comprising: a yarn joining portion that joins together.   The spinning machine according to any one of claims 1 to 4, wherein the spinning unit includes a spinning unit that twists a fiber bundle by a swirling airflow.

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