JP2013067483A - Spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning machine capable of reliably stopping rotation of a package by adjusting a contacting time of the package and a braking section.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 braking section 21 making contact with the rotating package P to brake rotation of the package P; a driving section 22 driving the braking section 21 so that the braking section comes into contact with or separates from the package P; and a control section 40 controlling the driving section 22 to adjust a contacting time of the package P and the braking section 22 by transmitting a control signal to the driving section 22.

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 defect detection unit that can detect a defect part of the spun yarn and a winding unit that winds the spun yarn to create a 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 is provided with a braking portion that can brake the rotation of the package, a guide portion that captures and guides the spun yarn, and a yarn splicing portion that joins the yarn ends of the spun yarn.

  When the defect detection unit detects a defect part of the spun yarn, the spinning unit cuts the spun yarn and interrupts the creation of the package. Then, when the work carriage arrives at the spinning unit, the work truck contacts the package to stop the rotation of the package. Thereafter, the work carriage captures the spun yarn by the guide portion and guides it to a predetermined position, and after removing the defective portion by the yarn splicing portion, splics the yarn ends of the spun yarn together. Through such a series of steps, the spinning unit can resume the creation of the package.

  However, if the package has a large moment of inertia, such as when the outer diameter of the package is increased due to the wound spun yarn, the rotation of the package is stopped even if the braking unit is in contact with the package for a predetermined time. There were cases where it was not possible. In addition, when the work carriage arrives at the spinning unit in a short time, the rotation speed of the package cannot be stopped even if the brake is brought into contact with the package for a predetermined time because the rotation speed of the package has not decreased. was there.

  Note that the work cart uses the reverse rotation roller to rotate (reverse) the package in the unwinding direction so that the guide unit can capture the spun yarn wound around the package. In addition, since the unwinding direction is the direction opposite to the winding direction of the package, this rotation may be referred to as “reverse rotation” in this specification. Further, the rotation in the winding direction of the package may be simply referred to as “rotation”. If the rotation of the package cannot be stopped, the reverse rotation roller comes into contact with the package that continues to rotate in the winding direction (forward direction) and tries to reverse the package. In this case, the quality of the spun yarn wound around the package may deteriorate. Furthermore, if the rotation of the package could not be stopped, the package could not be reversed even if the reverse rotation roller was used, and the guide portion could not catch the spun yarn wound around the package.

JP 2011-99192 A JP 2011-84854 A

  The present invention has been made to solve such problems, and an object of the present invention is to provide a spinning machine that can reliably stop the rotation of the package by adjusting the contact time between the package and the braking portion. .

  Next, means for solving this problem will be described.

  1st invention is a spinning machine provided with two or more spinning units which wind up spun yarn and produces a package, Comprising: A braking part, a drive part, and a control part are provided. The braking unit can contact the rotating package and brake the rotation of the package. The driving unit can drive the braking unit so as to be in contact with or separated from the package. The control unit transmits a control signal to the driving unit to control the driving unit so as to adjust a contact time between the package and the braking unit.

  2nd invention is a spinning machine which concerns on 1st invention, Comprising: The said control part adjusts the said contact time based on the outer diameter of the said package.

  3rd invention is a spinning machine which concerns on 1st or 2nd invention, Comprising: The said control part adjusts the said contact time based on the running speed of the spun yarn guide | induced to the said package.

  A fourth invention is a spinning machine according to any one of the first to third inventions, and when a continuous state of spun yarn is divided by one spinning unit, the spun unit travels to the spinning unit to perform yarn splicing. A work trolley for performing work is provided. The control unit adjusts the contact time based on a time from when the continuous state of the spun yarn is divided until the work carriage arrives at the spinning unit.

  A fifth invention is a spinning machine according to any one of the first to fourth inventions, and includes an input unit that can input the contact time and a storage unit that can store the input contact time. . The said control part controls the said drive part so that it may become the said contact time memorize | stored in the said memory | storage part.

  A sixth invention is a spinning machine according to any one of the first to fifth inventions, and includes a reverse rotation roller that contacts the package and rotates the package in the unwinding direction. The reverse rotation roller contacts the package after the contact time has elapsed and rotates the package in the unwinding direction.

  A seventh invention is a spinning machine according to any one of the first to sixth inventions, wherein the control unit performs braking until the rotation of the package stops after the braking unit contacts the package. The drive unit is controlled with a time equal to or longer than the time as the contact time.

  An eighth invention is the spinning machine according to the sixth invention, wherein the work carriage captures the spun yarn, the drive unit, the reverse rotation roller, and the divided spun yarn at a predetermined position. And a yarn joining portion that joins the ends of the spun yarn that has been split.

  A ninth invention is a spinning machine according to any one of the first to eighth inventions, wherein the spinning unit 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 contact time between the package and the braking portion can be adjusted, it is possible to reliably stop the rotation of the package.

  According to the second invention, since the contact time can be adjusted based on the outer diameter of the package, the rotation of the package can be reliably stopped.

  According to the third aspect, since the contact time can be adjusted based on the traveling speed of the spun yarn guided to the package, it is possible to reliably stop the rotation of the package.

  According to the fourth aspect of the present invention, the contact time can be adjusted based on the time from when the continuous state of the spun yarn is divided until the work carriage arrives at the spinning unit. Can be reliably stopped. As a result, the yarn splicing work by the work cart can be performed reliably.

  According to the fifth aspect of the invention, since the control unit can control the drive unit so that the contact time stored in the storage unit is reached, the contact time is arbitrarily changed, and the braking unit is brought into contact with the package with the optimum contact time. It becomes possible to make it.

  According to the sixth aspect, since the reverse rotation roller contacts the package and reverses the package after the contact time has elapsed, the reverse rotation roller can be prevented from contacting the rotating package. As a result, it is possible to prevent the reverse rotation roller from deteriorating the quality of the spun yarn wound around the package.

  According to the seventh aspect, since the contact time is equal to or longer than the braking time, the rotation of the package can be stopped more reliably. When the contact time is equal to the braking time, it is possible to prevent the braking unit from continuing to contact the package even after the rotation of the package is stopped, so that the operating efficiency of the spinning machine can be improved.

  According to the eighth invention, since the work carriage includes the braking unit, the driving unit, the reverse rotation roller, the guide unit, and the yarn joining unit, the configuration of each spinning unit can be simplified, and thus the spinning machine The configuration can be simplified.

  According to the ninth aspect of the invention, since the spinning unit includes the 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 operation | movement aspect at the time of stopping rotation of the package P. FIG. The figure which shows the operation | movement aspect at the time of reversing the package P. FIG. The figure which shows the operation | movement aspect at the time of catching the divided spun yarn Y. The figure which shows the operation | movement aspect at the time of guiding the divided spun yarn Y. 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 on the downstream side of the draft unit unit 2. 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 rotates the bobbin B gripped by the cradle 62 so as to be freely rotatable. The winding unit 6 traverses the spun yarn Y by a traverse device (not shown). Thus, the winding unit 6 can create the package P by winding the spun yarn Y while traversing.

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

  The braking unit 21 can contact the rotating package P and brake the rotation of the package P. 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 drive unit 22 can drive the braking unit 21 so as to be in contact with or separated from the package P. If it demonstrates in detail, the drive part 22 can drive the plate 21a of the braking part 21 so that contact or separation is possible for the outer peripheral surface of the package P (refer FIG.3 and FIG.4). The drive unit 22 is configured by an electric motor or the like. The driving unit 22 drives the braking unit 21 based on a control signal from the control unit 40.

  The reverse rotation roller 23 comes into contact with the package P and rotates (reverses) the package P in the unwinding direction that is opposite to the winding direction. More specifically, the reverse rotation roller 23 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 (see FIGS. 4, 5 and 6). . In the present embodiment, the reverse rotation roller 23 is driven by an electric motor (servo motor or the like) of a drive unit (not shown). Further, the reverse rotation roller 23 can be brought into contact with or separated from the outer peripheral surface of the package P when an air actuator (not shown) rotates the arm 23b. The reverse roller 23 is driven based on a control signal from the control unit 40.

  The guide unit 24 can capture and guide the spun yarn Y from which the continuous state is divided to a predetermined position. The guide unit 24 captures the spun yarn Y on the package P side and guides it to a predetermined position, and the first guide unit 24a can capture the spun yarn Y spun from the spinning unit 3 and guide it to the predetermined position. And two guide portions 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 section 25 joins the yarn ends of the spun yarn Y whose continuous state is divided. More specifically, the yarn joining portion 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 (see FIG. 6). . Here, the “spun yarn Y from which the continuous state is divided” 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 driving unit 22, the reverse rotation roller 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, an operation mode when stopping the rotation of the package P will be described in detail.

  FIG. 3 is a diagram illustrating an operation mode when the rotation of the package P is stopped. 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 and the driving roller 61 (see the black arrow in FIG. 3). As a result, the package P continues to rotate in the winding direction due to 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. More specifically, the drive unit 22 of the work carriage 20 rotates the arm 21b from the standby position to the operating position 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.

  The work carriage 20 needs to reverse the package P so that the first guide portion 24a can capture the spun yarn Y wound around the package P. Accordingly, the drive unit 22 of the work carriage 20 rotates the arm 21b from the operating position to the standby position to separate the plate 21a from the outer peripheral surface of the package P (see the black arrow in FIG. 4). In other words, the spinning machine 100 can adjust the contact time between the package P and the plate 21a by the control unit 40 controlling the drive unit 22.

  With this configuration, the spinning machine 100 can adjust the contact time between the package P and the plate 21a (braking portion 21), and thus can reliably stop the rotation of the package P. Details of the method for adjusting the contact time will be described later.

  The spinning machine 100 can adjust the contact time between the package P and the plate 21a based on the outer diameter of the package P. Thus, even when the outer diameter of the package P is large, that is, when the inertia moment of the package P is large, the braking unit 21 can reliably stop the rotation of the package P.

  Each spinning unit 10 constituting the spinning machine 100 includes an angle sensor (not shown) that can detect the tilt angle α (see FIG. 2) of the cradle 62. The tilt angle α of the cradle 62 has a correlation with the outer diameter of the package P. Therefore, the angle sensor can indirectly detect the outer diameter of the package P by detecting the tilt angle α of the cradle 62. The angle sensor may be an incremental sensor or the like in addition to a so-called absolute sensor or the like.

  More specifically, since the moment of inertia of the package P is large when the outer diameter of the package P is large, the control unit 40 controls the drive unit 22 so that the contact time between the package P and the plate 21a becomes long. When the outer diameter of the package P is small, since the moment of inertia of the package P is small, the control unit 40 controls the drive unit 22 so that the contact time between the package P and the plate 21a is shortened. With such a configuration, the spinning machine 100 according to this embodiment can adjust the contact time between the package P and the plate 21a based on the outer diameter of the package P, and thus can reliably stop the rotation of the package P. It becomes.

  Further, since the contact time can be shortened when the outer diameter of the package P is small, it is not necessary to keep the plate 21a in contact with the package P after the rotation of the package P is stopped. Thereby, since the spinning machine 100 can perform the yarn splicing operation by rotating the package P immediately after stopping the rotation of the package P, the operating efficiency of the spinning machine 100 can be improved. Furthermore, since the work cart 20 can resume the winding operation in a certain spinning unit 10 in a short time, it immediately travels to another spinning unit 10 and stops the rotation of the package P for the yarn splicing operation. Operation can be performed. Thereby, the operation efficiency of the spinning machine 100 as a whole is improved.

  When the contact time is controlled based on the outer diameter of the package P, the control unit 40 may adjust the contact time every time based on the outer diameter of the package P when the plate 21a is brought into contact with the package P. Further, a different contact time is set in advance in the control unit 40 for each predetermined range of the outer diameter of the package P, and the control unit 40 controls the drive unit 22 so that the set contact time is reached. Anyway.

  Furthermore, as another embodiment, the spinning machine 100 may adjust the contact time between the package P and the plate 21a based on the traveling speed of the spun yarn Y guided to the package P. In the spinning unit 10, since the spinning speed (speed at which the spinning unit 3 manufactures the spun yarn Y) is set in advance, the traveling speed of the spun yarn Y guided to the package P can be recognized. However, each spinning unit 10 may be provided with a speed sensor that can detect the traveling speed of the spun yarn Y. The spinning machine 100 includes the traveling speed of the spun yarn Y, the elapsed time from the start of winding of the package P, the winding conditions of the package P (the diameter of the bobbin B, the rotational speed of the bobbin B, the traverse speed of the traverse device, etc. ), The outer diameter of the package P may be recognized, and the contact time between the package P and the plate 21a may be controlled. When the traveling speed of the spun yarn Y is slow, the speed at which the outer diameter of the package P becomes large is also slow. Further, when the traveling speed of the spun yarn Y is fast, the speed at which the outer diameter of the package P becomes large is also fast.

  With such a configuration, the spinning machine 100 according to another embodiment can adjust the contact time between the package P and the plate 21a based on the traveling speed of the spun yarn Y guided to the package P, so that the rotation of the package P is ensured. It becomes possible to stop.

  Furthermore, as another embodiment, the spinning machine 100 includes the package P and the plate P based on the time from when the continuous state of the spun yarn Y is divided at a certain spinning unit 10 until the work carriage 20 arrives at the spinning unit 10. The contact time of 21a may be adjusted. More specifically, when the work carriage 20 arrives at the spinning unit 10 in a short time after the continuous splitting of the spun yarn Y, the rotational speed of the package P may not decrease. In such a case, the control unit 40 controls the drive unit 22 so that the contact time between the package P and the plate 21a becomes long. On the other hand, if it takes more than a predetermined time for the work carriage 20 to arrive at the spinning unit 10 after the continuous splitting of the spun yarn Y, the package P is separated from the drive roller 61 by the passage of time. There is a case where the rotation speed of P is lowered or the rotation of the package P is stopped. In such a case, the control unit 40 controls the drive unit 22 so that the contact time between the package P and the plate 21a is shortened.

  In such a case, the control unit 40 needs to measure the time from when the work cart 20 starts to travel until it arrives at the target spinning unit 10. For example, the control unit 40 may measure the time from when the cutter 41 cuts the spun yarn Y until the work carriage 20 arrives at the target spinning unit 10.

  With such a configuration, the spinning machine 100 according to the another embodiment enables the contact between the package P and the plate 21a based on the time until the work carriage 20 arrives at the spinning unit 10 after the continuous state of the spun yarn Y is divided. Since the time can be adjusted, the rotation of the package P can be surely stopped. Further, when the rotational speed of the package P has already decreased when the work carriage 20 arrives at the spinning unit 10, the contact time between the package P and the plate 21a can be shortened. It is not necessary to keep the plate 21a in contact with the package P even after the rotation of the plate is stopped. Thereby, since the spinning machine 100 can perform the yarn splicing operation by rotating the package P immediately after stopping the rotation of the package P, the operating efficiency of the spinning machine 100 can be improved. Furthermore, since the work cart 20 can resume the winding operation in a certain spinning unit 10 in a short time, it immediately travels to another spinning unit 10 and stops the rotation of the package P for the yarn splicing operation. Operation can be performed. Thereby, the operation efficiency of the spinning machine 100 as a whole is improved.

  The contact time between the package P and the plate 21a is equal to or longer than the braking time from when the plate 21a contacts the package P until the rotation of the package P stops.

  Thus, since the spinning machine 100 according to the present embodiment sets the contact time to be equal to or longer than the braking time, the rotation of the package P can be stopped more reliably.

  In addition, the spinning machine 100 includes an input unit 40A through which an operator can input a contact time, and a storage unit 40B that can store the input contact time (see FIG. 1).

  Accordingly, the spinning machine 100 according to the present embodiment can optimize the drive unit 22 by arbitrarily changing the contact time because the control unit 40 can control the drive unit 22 so that the contact time is stored in the storage unit 40B. Is possible.

  Next, an operation mode when the cut spun yarn Y is captured and guided to a predetermined position will be described in detail.

  FIG. 4 is a diagram illustrating an operation mode when the package P is reversed. FIG. 5 is a diagram showing an operation mode when the cut spun yarn Y is captured. FIG. 6 is a diagram illustrating an operation mode when guiding the cut spun yarn Y. 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 work carriage 20 needs to reverse the package P so that the first guide portion 24a can capture the spun yarn Y wound around the package P. For this reason, the work carriage 20 reverses the package P using the reverse rotation roller 23 after stopping the rotation of the package P by the plate 21a as described above. More specifically, an air actuator (not shown) provided on the work carriage 20 rotates the arm 23b to bring the reverse rotation roller 23 into contact with the outer peripheral surface of the package P (see the black arrow in FIG. 4). ). Then, the reverse rotation roller 23 is driven by a drive unit (not shown) provided on the work carriage 20 to reverse the package P (see white arrows in FIG. 4).

  With such a configuration, the spinning machine 100 according to the present embodiment causes the reversing roller 23 to contact the package P after the contact time elapses and reverse the package P, so that the spun yarn Y wound around the package P is rotated. The spun yarn Y can be unwound from the package P without deteriorating the quality.

  Next, the work carriage 20 captures the divided spun yarn Y and guides it to a predetermined position. More specifically, the first guide portion 24a rotates downward from the standby position, and captures the spun yarn Y wound around the package P (see the black arrow in FIG. 5). 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 and captures the spun yarn Y spun from the spinning portion 3 (see the black arrow in FIG. 5). 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).

  Thereafter, the yarn joining portion 25 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. . In this way, the spinning machine 100 can resume the creation of the package P. Although not described in detail, the spun yarn Y is wound around the roller 52 of the tension stabilizing unit 5 again by the operations of the tension stabilizing unit 5 and the second guide unit 24b.

  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. 7 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 injecting air from the nozzle holes formed in the nozzle block 33 into the spinning chamber SC, 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. 7). 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. 7). 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.

  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. In addition, the spinning unit 3 is not limited to the configuration in which the fiber bundle F is twisted by the nozzle holes that generate the unidirectional swirling airflow, and various spinning methods can be applied. For example, the spinning unit 3 may include a pair of nozzles that generate swirling airflows whose directions are opposite to each other, and the fiber bundle F may be simultaneously twisted in opposite directions.

  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 embodiment, the timing for bringing the package P and the plate 21a into contact is before the yarn splicing operation. For example, when the package P is fully wound, the plate 21a is brought into contact with the package P. Also good. In this case, the rotation of the package P may be stopped by the plate 21 a of the work cart 20, and the braking unit 21, the drive unit 22, and the reverse rotation roller 23 are provided in the doffing cart 30 and provided in the doffing cart 30. The rotation of the package P may be stopped by the plate 21a. Since the spinning unit 10 can wind up packages P having different full winding diameters, the contact time between the package P and the plate 21a may be controlled based on a preset full winding diameter of the package P. . When the package P is fully wound, it is not necessary to rotate the package P in the unwinding direction, so that the reverse rotation roller 23 is not brought into contact with the package P.

  In the above-described embodiment, the package P is rotated in the unwinding direction by the reverse rotation roller 23. However, when the package P is reversely rotated by another means, the reverse rotation roller 23 can be omitted.

  In the above embodiment, the brake unit 21, the drive unit 22, and the reverse rotation roller 23 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.

  The method of detecting the outer diameter of the package P is not limited to the above-described plurality of embodiments. For example, by measuring the length of the spun yarn Y wound around the package P by the defect detection unit 4, The outer diameter of the package P may be estimated based on the thickness (count) and the winding condition of the package P (the traverse speed of the traversing device, the diameter of the bobbin B, etc.).

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 Work cart 21 Braking part 22 Drive part 23 Reverse rotation roller 24 Guide part 24a First guide part 24b Second guide Section 25 Yarn splicing section 30 Doffing cart 40 Control section 40A Input section 40B Storage section 100 Spinning machine F Fiber bundle P Package Y Spinning yarn

Claims (9)

A spinning machine comprising a plurality of spinning units for winding a spun yarn to create a package,
A braking part capable of braking the rotation of the package in contact with the rotating package;
A drive unit capable of driving the braking unit in contact with or away from the package; and
A spinning machine comprising: a control unit that transmits a control signal to the driving unit to control the driving unit so as to adjust a contact time between the package and the braking unit.   The spinning machine according to claim 1, wherein the control unit adjusts the contact time based on an outer diameter of the package.   The spinning machine according to claim 1 or 2, wherein the control unit adjusts the contact time based on a traveling speed of a spun yarn guided to the package. 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 divided by one spinning unit;
The said control part adjusts the said contact time based on the time after the continuous state of a spun yarn is divided | segmented until the said work trolley arrives at the said spinning unit, The said contact time is characterized by the above-mentioned. The spinning machine according to any one of the above. An input unit capable of inputting the contact time;
A storage unit capable of storing the input contact time;
The spinning machine according to any one of claims 1 to 4, wherein the control unit controls the driving unit so as to be the contact time stored in the storage unit. Comprising a reverse roller for contacting the package and rotating the package in the unwinding direction;
The spinning machine according to any one of claims 1 to 5, wherein the reverse rotation roller contacts the package after the contact time has elapsed and rotates the package in the unwinding direction.   The control unit controls the driving unit using a time equal to or longer than a braking time from when the braking unit comes into contact with the package until the rotation of the package stops as the contact time. The spinning machine according to any one of claims 1 to 6.   The work carriage includes the braking unit, the driving unit, the reverse rotation roller, a guide unit that captures the divided spun yarn and guides it to a predetermined position, and the yarn ends of the divided spun yarn. The spinning machine according to claim 6, further comprising a yarn splicing section to be combined.   The spinning machine according to any one of claims 1 to 8, wherein the spinning unit includes a spinning unit that twists a fiber bundle by a swirling airflow.

Images