JP2010149977A - Yarn winding device and automatic winder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic winder controlling the winding tension of a package in a constant condition. <P>SOLUTION: This automatic winder includes: a drum driving motor 53 rotating a package 30; an accumulator 61 storing a yarn before being wound into the package 30 and drawing out the stored yarn to a yarn supplying bobbin 21 side; a clearer 15 detecting a yarn defect; and a splicer device 14 performing a yarn splicing operation. The automatic winder also includes: a first tension applying section 41 arranged between the yarn supply bobbin 21 and accumulator 61; a second tension applying section 42 arranged between the accumulator 61 and package 30; and a unit control section 50 controlling the first tension applying section 41 and second tension applying section 42. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a yarn winding device, and more particularly to control of tension applied to a yarn wound on a package.

  Yarn produced by a spinning machine or the like is wound around a yarn feeding bobbin and conveyed to a yarn winding device. In the yarn winding device, the yarns of the plurality of yarn feeding bobbins conveyed to the yarn winding device are joined together by the yarn joining device to generate a package having a predetermined length. In such a yarn winding device, a configuration may be adopted in which fluctuation of the winding tension is suppressed by applying an appropriate tension by the tension control means during winding of the yarn.

Such a yarn winding device is disclosed in, for example, Patent Document 1. A winding unit, which is a yarn winding device of Patent Document 1, includes a gate tensor that meshes a pair of comb-like bodies on a yarn path in the middle of winding a yarn unwound from a yarn feeding bobbin onto a winding package. Composed.
JP-A-5-766

Further, Patent Document 2 discloses a yarn winding method and apparatus for winding a yarn unwound from a bobbin once into a container and then winding the yarn around a package.
US Pat. No. 3,314,621

  Increasing the winding speed of the package has been demanded conventionally for improving production efficiency. However, if the winding speed is increased, the load on the traveling yarn increases, and yarn breakage frequently occurs. When yarn breakage occurs, it is necessary to pull out the yarn from the package and perform splicing with the yarn on the yarn feeding bobbin side. However, when the yarn is spliced to reverse the package and catch the yarn on the package side, the suction arm The surface portion of the package is pulled by the suction force, and the twill may be disturbed.

  In addition, during the yarn joining operation, the winding operation is interrupted in order to reverse the package. Therefore, after the yarn joining operation, it is necessary to accelerate the winding speed from zero to the normal speed. Fluctuation was likely to occur. Further, when the remaining yarn of the yarn supplying bobbin decreases, the yarn unwound from the yarn supplying bobbin gets entangled with the bobbin and a large tension fluctuation occurs. This tension fluctuation affects the winding tension of the package, and the yarn The occurrence of cutting and the deterioration of the package quality were incurred.

  In this regard, the configuration of Patent Document 1 can suppress the occurrence of peak tension and reduce the frequency of yarn breakage. However, for example, the tension fluctuation that occurs at the time of replacing the yarn feeding bobbin is particularly large. Therefore, even if the tension control means is provided, if a large tension fluctuation occurs, it is difficult to satisfactorily remove the influence on the package.

  Moreover, although the structure of patent document 2 can give a fixed tension to the yarn wound around the package by the brake, the tension applied according to the winding state of the package or the yarn quality can be changed flexibly. Is not disclosed.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a yarn winding device capable of controlling the winding tension of a package to a constant state from the beginning to the end of winding of the package.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to a first aspect of the present invention, there is provided the following configuration of a yarn winding device that winds a yarn drawn from a replaceable yarn feeding bobbin around a package. That is, the yarn winding device includes a tension transmission blocking mechanism that blocks transmission of tension fluctuation generated on the yarn feeding bobbin side to prevent transmission of tension fluctuation to the package, and a yarn wound around the package. Tension control means for flexibly controlling the tension.

  Thereby, the propagation of the tension fluctuation can be blocked by the tension transmission blocking mechanism so that the tension fluctuation does not affect the winding operation on the package side. Further, since the tension is controlled by the tension control means after the tension fluctuation is blocked by the tension transmission blocking mechanism, the tension of the yarn wound around the package can be kept constant. Therefore, the influence of the tension variation on the package can be suppressed, and a package with a good winding state can be produced.

  The yarn winding device preferably includes another tension control unit that flexibly controls the tension applied to the yarn from the yarn feeding bobbin to the tension transmission blocking mechanism.

  Thereby, the tension of the yarn can be made constant throughout the winding operation. Further, since the yarn tension is flexibly controlled at two locations, a high-quality package with a good winding state can be formed.

  According to a second aspect of the present invention, there is provided the following configuration of a yarn winding device that winds a yarn drawn from a replaceable yarn feeding bobbin around a package. That is, the yarn winding device includes a winding drive unit, a yarn accumulating device, a yarn defect detecting unit, a yarn joining unit, a first tension control unit, a second tension control unit, and a control unit. . The winding drive unit rotates the package. The yarn accumulating device can store the yarn before being wound around the package, and can draw out the accumulated yarn to the yarn supplying bobbin side. The yarn defect detection unit detects a yarn defect. The yarn joining section performs a yarn joining operation. The first tension control means is disposed between the yarn supplying bobbin and the yarn accumulating device. The second tension control means is disposed between the yarn accumulating device and the package. The control unit controls the first tension control unit and the second tension control unit.

  Thereby, the propagation of the tension fluctuation can be blocked by the yarn accumulating device so that the tension fluctuation generated at the beginning and end of winding of the yarn supplying bobbin does not affect the winding operation on the package side. Therefore, even when a large fluctuation in tension occurs on the yarn feeding bobbin side, the yarn can be continuously wound around the package while the winding tension is kept constant. Even when a yarn defect or yarn breakage occurs or when the yarn feeding bobbin is replaced, the yarn stored in the yarn accumulating device is wound around the package, and the yarn is pulled out from the yarn accumulating device to the yarn feeding bobbin side. Since the yarn joining operation can be performed, the winding operation can be continued without reversing the package. Therefore, it is possible to prevent the waste yarn at the time of yarn joining from being mixed into the package and the winding shape from being defective in the package. Furthermore, an appropriate tension can be applied to the yarn before storage in the yarn storage device by the first tension control means, and an appropriate tension can be applied to the yarn before winding onto the package by the second tension control means. . As a result, the winding tension can be controlled uniformly throughout the winding operation, and the occurrence of yarn breakage can be effectively prevented. As described above, since the yarn can be continuously wound around the package in a constant state, a high-quality package with a good winding state can be generated.

  In the yarn winding device, it is preferable that the control unit can adjust the tension applied to the yarn by the second tension control unit according to the winding speed of the package.

  As a result, even when the winding speed of the package changes, for example, when the winding speed increases, the winding work is performed while keeping the winding tension constant by controlling the tension applied to the yarn to be weakened. It can be performed.

  The yarn winding device is preferably configured as follows. That is, the yarn winding device includes a yarn storage amount detection unit for detecting the yarn storage amount of the yarn storage device. The control unit changes the winding speed of the package according to the yarn amount stored in the yarn storage device, and the tension applied to the yarn by the second tension control means according to the changed winding speed. Can be adjusted.

  As a result, even when the winding speed of the package is changed so that the amount of yarn stored in the yarn storage device becomes appropriate, the second tension control means applies tension to the yarn according to the winding speed. The amount of yarn stored in the yarn storage device can be adjusted while maintaining a constant winding tension.

  According to a third aspect of the present invention, there is provided an automatic winder comprising a plurality of the yarn winding devices.

  Thereby, an automatic winder capable of producing a high-quality package can be provided.

  Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of a winding unit 10 which is a yarn winding device according to an embodiment of the present invention.

  A winding unit 10 shown in FIG. 1 is configured to wind a yarn 20 unwound from a yarn supplying bobbin 21 around a winding bobbin 22 while traversing to form a package 30 having a predetermined length and a predetermined shape. The automatic winder according to the present embodiment includes a plurality of winding units 10 arranged side by side, and an unillustrated machine base control device arranged at one end in the arranged direction. Each winding unit 10 includes a unit frame (not shown) provided on the left and right sides in a front view, and a winding unit body 16 provided on the side of the unit frame.

  The winding unit main body 16 includes a winding unit 5, a yarn accumulating unit 6, a yarn defect detecting unit 7, a yarn joining unit 8, and a yarn supplying unit 9. The winding unit 5 includes an unillustrated cradle configured to hold the winding bobbin 22, a winding drum (traverse drum) 24 for traversing the yarn 20 and rotating the winding bobbin 22. And a second tensor 42 described later. The cradle is configured to be swingable in a direction close to or away from the take-up drum 24, whereby the package 30 is brought into contact with or separated from the take-up drum 24. As shown in FIG. 1, a spiral traverse groove 27 is formed on the outer peripheral surface of the winding drum 24, and the yarn 20 is traversed by the traverse groove 27. Further, the yarn storage section 6 includes an accumulator 61 for storing the yarn 20 before being wound around the package 30. The yarn defect detection unit 7 includes a clearer 15 for detecting a yarn defect. The yarn joining section 8 includes a splicer device (yarn joining device) 14 that performs a yarn joining operation, a lower yarn guide pipe (lower yarn catching means) 25, and an upper yarn guide pipe (upper yarn catching means) 26. . The yarn supplying unit 9 includes a yarn supplying bobbin holding unit 60 for holding the yarn supplying bobbin 21, a yarn unwinding assisting device 12, and a first tensor 41.

  The cradle is provided with a lift-up mechanism and a package brake mechanism (not shown). The lift-up mechanism can raise the cradle to separate the package 30 from the winding drum 24 when a defective yarn feeding bobbin is continuously supplied or when a machine trouble occurs. Yes. The package brake mechanism is configured to stop the rotation of the package 30 held by the cradle at the same time when the cradle is raised by the lift-up mechanism.

  Further, the yarn supplying section 9 further includes a bobbin supplying device (not shown) for supplying a new yarn supplying bobbin 21 to the yarn supplying bobbin holding section 60. The bobbin supply device includes a magazine-type supply device and a tray-type supply device. In this embodiment, a magazine-type supply device is used. When all the yarns 20 are pulled out from the yarn supplying bobbin 21 set in the winding unit 10, the yarn supplying unit 9 discharges the empty bobbin held by the yarn supplying bobbin holding unit 60, and the bobbin supply device Sequentially supplies new yarn supplying bobbins 21 to the yarn supplying bobbin holding portion 60 for replacement.

  The yarn unwinding assisting device 12 lowers the regulating member 40 covering the core pipe of the yarn supplying bobbin 21 in conjunction with the yarn unwinding from the yarn supplying bobbin 21, thereby unwinding the yarn from the yarn supplying bobbin 21. Is to assist. The regulating member 40 contacts the balloon formed on the upper portion of the yarn feeding bobbin 21 by the rotation and centrifugal force of the yarn unwound from the yarn feeding bobbin 21, and applies the appropriate tension to the balloon to release the yarn. Assist the moth. An unillustrated sensor for detecting the chase portion of the yarn feeding bobbin 21 is provided in the vicinity of the restricting member 40. When this sensor detects the descent of the chase portion, the restricting member 40 is followed accordingly. For example, it can be lowered by an air cylinder (not shown).

  A yarn feeler (lower thread detection sensor) 37 capable of detecting the presence or absence of the thread 20 is provided in the vicinity of the yarn unwinding assisting device 12. The yarn feeler 37 is configured to detect the absence of the yarn 20 drawn from the yarn feeding bobbin 21 and transmit a yarn absence detection signal to the unit controller 50.

  The first tensor 41 applies a predetermined tension to the traveling yarn 20. In the present embodiment, the first tensor 41 is a gate type in which movable comb teeth are arranged with respect to fixed comb teeth. The movable comb teeth can be rotated by a rotary solenoid (not shown) so that the comb teeth are engaged or released. With this first tensor 41, a certain tension can be applied to the wound yarn and the quality of the package 30 can be improved. Details of the control of the first tensor 41 will be described later.

  When the clearer 15 detects a yarn defect, or when the yarn breakage occurs during unwinding from the yarn feeding bobbin 21, the splicer device 14 removes the lower yarn on the yarn feeding bobbin 21 and the upper yarn on the package 30 side. It is intended for splicing. As the splicer device 14, a mechanical device, a device using a fluid such as compressed air, or the like can be used.

  The clearer 15 is configured to detect a defect by monitoring the thickness of the yarn 20 with an appropriate sensor, and a signal from the sensor of the clearer 15 is processed by the analyzer 52, whereby a yarn such as a slab is obtained. Defects can be detected. The clearer 15 can also function as a sensor that detects the traveling speed of the yarn 20 and a sensor that simply detects the presence or absence of the yarn 20.

  Further, on the downstream side of the clearer 15, a waxing device 17 is disposed for waxing the running yarn. A suction unit (not shown) is provided on the downstream side of the waxing device 17. This suction part is connected to an appropriate negative pressure source, and can remove suction and removal of wax wrinkles and yarn waste.

  The accumulator 61 is configured as a yarn storage device that can store a predetermined amount of yarn. The yarn 20 conveyed from the yarn supplying bobbin 21 is stored in the accumulator 61, and then drawn out from the accumulator 61 and wound on the package 30.

  The accumulator 61 is configured so that the stored yarn 20 can be pulled out both upstream and downstream. With this configuration, the accumulator 61 can perform the yarn joining operation by pulling the yarn 20 to the yarn feeding bobbin 21 side in parallel with winding the stored yarn 20 around the package 30. The details of the structure of the accumulator 61 and the operation during the yarn splicing operation will be described later.

  The second tensor 42 is arranged on the downstream side of the accumulator 61 and controls the tension when the yarn from the accumulator 61 is wound around the package 30. As a result, the yarn pulled out from the accumulator 61 is wound around the winding bobbin 22 with an appropriate tension applied. As the second tensor 42, in the present embodiment, similarly to the first tensor 41, a gate type that arranges movable comb teeth with respect to fixed comb teeth is used. Further, the tension applied to the yarn 20 by the second tensor 42 is controlled by the unit controller 50 according to the winding speed.

  On the lower side and the upper side of the splicer device 14, a lower thread guide pipe 25 that captures and guides the lower thread on the yarn feeding bobbin 21, and an upper thread guide pipe 26 that captures and guides the upper thread on the package 30 side. , Is provided. A lower thread suction port 32 is formed at the front end of the lower thread guide pipe 25, and an upper thread suction port 34 is also formed at the front end of the upper thread guide pipe 26. Appropriate negative pressure sources are connected to the lower thread guide pipe 25 and the upper thread guide pipe 26, respectively, so that a suction flow can be applied to the lower thread suction port 32 and the upper thread suction port 34. ing.

  The lower thread guide pipe 25 is configured to rotate around a shaft 33 to guide the lower thread to the splicer device 14. Further, the upper thread guide pipe 26 rotates about the shaft 35 to the capturing position indicated by the chain line in FIG. As shown in FIG. 1, the upper thread suction port 34 of the upper thread guide pipe 26 faces the thread 20 near the accumulator 61 at the capturing position. In this state, the upper thread guide pipe 26 sucks and captures the thread 20 through the upper thread suction port 34, and can guide the thread 20 to the splicer device 14 by rotating to the original position.

  The take-up bobbin 22 is driven by rotating a take-up drum 24 disposed opposite to the take-up bobbin 22. The winding drum 24 is connected to an output shaft of a drum driving motor (winding driving unit) 53, and the operation of the drum driving motor 53 is controlled by a motor control unit 54. The motor control unit 54 is configured to perform control for operating and stopping the drum drive motor 53 in response to an operation signal from the unit control unit 50.

  Next, the accumulator 61 will be described with reference to FIG. FIG. 2 is a schematic cross-sectional view showing a schematic configuration of the accumulator 61. As shown in FIG. 2, the accumulator 61 includes a rotating shaft casing 70, a storage portion 71, and a yarn guide portion 72. Further, the rotary shaft casing 70 includes a cylindrical tube portion 78 that is open at the top, and a flange portion 79 that is formed at an open end of the tube portion 78.

  The reservoir 71 is disposed above the flange 79. The storage portion 71 includes a support plate 81 formed in a disc shape, a plurality of rod members 82 protruding upward from the support plate 81, and a disc shape to which tip portions of the plurality of rod members 82 are connected. Mounting plate 83. The storage portion 71 is disposed so as to form a gap between the support plate 81 and the flange portion 79, and is configured so that a winding cylinder 75 described later can rotate inside the gap. Yes.

  The plurality of rod members 82 are arranged at equal intervals on a circumference orthogonal to the vertical direction, and the storage portion 71 is configured to form a substantially cylindrical shape by these rod members 82. The yarn 20 is stored in the storage portion 71 by winding the yarn 20 around the outer peripheral portion of the substantially cylindrical storage portion 71 composed of the plurality of rod members 82.

  The yarn guide portion 72 is disposed inside the rotary shaft casing 70. In the rotary shaft casing 70, an introduction hole 80 is formed in the lower part (the end opposite to the storage part 71) of the cylindrical part 78, and the yarn 20 drawn out from the yarn feeding bobbin 21 passes through the introduction hole 80. It is guided to the yarn guide part 72.

  A rotating shaft 73 that is attached to the rotating shaft casing 70 and the storage portion 71 so as to be rotatable relative to the rotating shaft casing 70 is disposed inside the cylindrical portion 78. A servo motor (yarn storage drive unit) 55 is incorporated between the rotary shaft 73 and the cylindrical portion 78, and the rotary shaft 73 can be rotated forward and backward. A shaft hole-shaped yarn passage 74 is formed at the center of the rotating shaft 73.

  A winding cylinder (winding means) 75 formed in a cylindrical shape is fixed to one end of the rotating shaft 73 (the end opposite to the introduction hole 80). The winding cylinder 75 extends in the radial direction so as to pass through the gap between the rotating shaft casing 70 (the flange 79) and the support plate 81 while being slightly inclined upward, and a part of the tip portion thereof is rotated. It is configured to protrude slightly from the shaft casing 70. The winding cylinder 75 is configured to rotate integrally with the rotating shaft 73. Further, the inside of the winding cylinder 75 is connected to the yarn passage 74.

  In the above configuration, the yarn 20 introduced into the rotary shaft casing 70 from the introduction hole 80 of the yarn guide portion 72 passes through the inside of the yarn passage 74 and the winding cylinder 75 and is discharged from the tip of the winding cylinder 75. By doing so, it is guided to the side surface portion of the storage portion 71. Accordingly, when the servo motor 55 is driven in the forward direction, the winding cylinder 75 rotates together with the rotary shaft 73, whereby the yarn 20 is wound around the side surface portion.

  The plurality of rod members 82 arranged in the storage unit 71 are arranged so as to incline toward the inner side of the storage unit 71 from the end on the support plate 81 side toward the end on the mounting plate 83 side. Yes. By the inclination of the rod member 82, the yarn wound around the storage portion 71 moves so as to slide upward. Accordingly, when the yarn 20 is continuously wound by the winding cylinder 75 described later, the yarn wound around the inclined portion moves upward, so that the side portion constituted by the rod member 82 has The yarn 20 is stored in a spirally aligned state.

  In this embodiment, since the servo motor 55 is used as the yarn accumulating drive unit, it is possible to precisely stop or accelerate the rotation of the winding cylinder 75 or the like. As a result, the drawing amount of the yarn 20, the timing of drawing the yarn 20, and the like can be accurately controlled, and the yarn joining operation can be performed more smoothly.

  As shown in FIG. 1, the winding unit 10 includes a first storage sensor 76 disposed on the upper portion of the storage portion 71 and a second storage sensor 77 disposed on the lower portion of the storage portion 71. Yes. The two storage sensors (yarn storage amount detection means) 76 and 77 are configured by non-contact type optical sensors or the like, and each is electrically connected to the unit controller 50. The first storage sensor 76 is disposed on the upper end side of the storage unit 71 so as to detect the yarn wound around the upper end side of the rod member 82 constituting the storage unit 71, and detects the maximum storage state of the accumulator 61. The second storage sensor 77 is disposed on the lower end side of the storage portion 71 so that the yarn wound on the lower end side of the rod member 82 can be detected, and detects a shortage of yarn storage in the accumulator 61. The unit control unit 50 controls the winding speed of the yarn 20 around the storage unit 71 based on the yarn detection signal from the first storage sensor 76 and the second storage sensor 77. Thereby, the yarn storage amount of the accumulator 61 can be adjusted so as not to be excessive or insufficient.

  Note that the speed at which the yarn is wound around the storage unit 71 in the accumulator 61 (in other words, the yarn supply speed from the upstream yarn feeding bobbin 21 to the accumulator 61) is sequentially amplified when the winding of the yarn is started. Control is performed so that the speed is equal to or faster than the yarn winding speed of the package 30. Then, when a predetermined time has passed from the start of winding and the amount of yarn necessary for the yarn joining operation is stored in the accumulator 61, the drive of the servo motor 55 is controlled to store the yarn at a speed equal to the yarn winding speed of the package 30. The yarn is wound around the portion 71 and the amount of yarn stored in the accumulator 61 is maintained. Note that the amount of yarn required for the yarn joining operation is the amount of yarn drawn upstream from the accumulator 61 for the yarn joining operation in the splicer device 14 described later, and the package 30 performed in parallel with the yarn joining operation. The amount of yarn drawn from the accumulator 61 to the downstream side for winding is added. In the storage unit 71, it is preferable to always maintain a state in which yarns exceeding the necessary yarn amount are stored. In this way, by keeping the amount of yarn stored in the accumulator 61 constant, the unwinding position of the yarn drawn from the accumulator 61 to the downstream side is specified within a predetermined range, and the yarn drawing tension from the accumulator 61 is kept constant. Can be kept in.

  Next, a yarn joining operation when the clearer 15 detects a yarn defect will be described. When the clearer 15 detects a yarn defect by monitoring the yarn thickness, the clearer 15 transmits a yarn defect detection signal to the unit controller 50. Based on this yarn defect detection signal, the unit controller 50 operates a cutter (yarn cutting means) provided below the clearer 15 to cut the yarn 20. At the same time, the unit controller 50 stops the rotation of the winding cylinder 75 by stopping the servo motor 55 of the accumulator 61. Thereby, the upper thread is stopped below the introduction hole 80 of the accumulator 61.

  Then, the unit control unit 50 rotates the upper thread guide pipe 26 to the capture position around the shaft 35, sucks and captures the thread near the inlet of the accumulator 61, and rotates downward in this state to the splicer device 14. Guide the yarn. Further, the unit controller 50 guides the lower thread to the splicer device 14 by rotating the lower thread guide pipe 25 upward about the shaft 33 in a state where the lower thread is sucked and captured by the lower thread suction port 32. Then, after splicing the upper yarn and the lower yarn with the splicer device 14, the servo motor 55 is controlled again to rotate the winding cylinder 75 in the direction in which the yarn 20 is stored.

  Next, the yarn joining operation when the yarn feeding bobbin 21 is replaced will be described. When the yarn feeler 37 detects that the yarn supplied from the yarn feeding bobbin 21 has run out, the yarn feeler 37 transmits a yarn absence detection signal to the unit controller 50. The unit controller 50 that has received the yarn absence detection signal stops the supply of the yarn to the accumulator 61.

  Then, the unit controller 50 rotates the upper thread guide pipe 26 to the capturing position to suck and capture the thread near the inlet of the accumulator 61, and rotates downward in this state to guide the upper thread to the splicer device 14. When a new yarn supplying bobbin 21 is supplied by the magazine type supply device, the yarn on the new yarn supplying bobbin 21 side is guided to the splicer device 14 by the lower yarn guide pipe 25. After splicing the upper yarn and the lower yarn with the splicer device 14, the servomotor 55 is controlled again to rotate the winding cylinder 75 in the direction in which the yarn 20 is stored.

  Next, with reference to FIG. 3, the application of tension according to the winding speed by the first tensor 41 and the second tensor 42 will be described. FIG. 3 is a graph showing the relationship between the yarn speed and the current value of the tensioner for each yarn count (10, 20, 30, 60, 80, 100). The current value of the tensioner corresponds to the tension applied to the yarn. When the current value is small, it means that the tension value applied to the yarn is small. The yarn count is cotton count, and the larger the number, the thinner the yarn diameter. For example, the diameter of the yarn of the count 20 is thinner than the diameter of the yarn of the count 10 shown in FIG. 3. Similarly, the diameter of the yarn of the count 30 is thinner than the diameter of the yarn of the count 20. It has become.

  The winding tension when winding the yarn around the package 30 is the sum of the tension generated by the traveling of the yarn 20 and the tension applied by the tension control means. When the yarn winding speed is changed, the tension generated by the traveling of the yarn 20 fluctuates accordingly. By adjusting the tension applied to the yarn 20 by the second tensor in accordance with the tension variation, the winding is performed. Tension can be kept constant. Specifically, for example, as shown in the graph of FIG. 3, the winding tension is made constant by controlling the tension value (current value) by the tensor so as to decrease as the winding speed increases.

  In the present embodiment, the winding tension of the package 30 can be made constant by changing the tension applied by the second tensioner 42 to the yarn 20 unwound from the accumulator 61. Specifically, when the winding speed of the yarn 20 increases, the tension generated by the traveling of the yarn 20 increases, so that the tension applied by the second tensor 42 is controlled to be reduced by the above amount. On the other hand, when the winding speed becomes slow, the tension caused by the traveling of the yarn 20 is weakened, so that the tension applied by the second tensor 42 is controlled to be increased by the above amount. As described above, the winding tension can be kept constant.

  As described above, the winding unit 10 of the present embodiment that winds the yarn 20 drawn from the replaceable yarn feeding bobbin 21 around the package 30 is configured as follows. The winding unit 10 interrupts the transmission of the tension fluctuation generated on the yarn feeding bobbin 21 side, and prevents the tension fluctuation from being transmitted to the package. A second tensioner (tension control means) 42 capable of flexibly controlling the tension of the yarn to be taken.

  With this configuration, propagation of the tension variation can be blocked by the accumulator 61 so that the tension variation does not affect the winding operation on the package 30 side. In addition, since the tension fluctuation is blocked by the accumulator 61 and the tension of the yarn wound around the package 30 is appropriately controlled by the second tensor 42, the tension of the yarn 20 wound up can be kept constant. Therefore, the influence of the tension variation on the package 30 can be suppressed, so that a package with a good winding state can be produced. Further, since the winding operation on the package 30 side can be continuously performed during the yarn splicing operation, a loss in winding time caused by the interruption of the winding operation of the package 30 can be reduced, and the production efficiency can be reduced. Can be improved.

  Further, the winding unit 10 of the present embodiment is configured as follows. The winding unit 10 includes a first tensor (another tension control unit) 41 that flexibly controls the tension applied to the yarn 20 from the yarn feeding bobbin 21 to the accumulator 61.

  With this configuration, the tension of the yarn 20 can be made constant throughout the winding operation. In addition, since the tension of the yarn is flexibly controlled at two locations, a high quality package 30 with a good winding state can be formed.

  Further, the winding unit 10 of the present embodiment is configured as follows. That is, the winding unit 10 includes a drum drive motor 53, an accumulator 61, a clearer 15, a splicer device 14, a first tensor 41, a second tensor 42, and a unit controller 50. The drum drive motor 53 rotates the package 30. The accumulator 61 can store the yarn 20 before being wound around the package 30, and can draw out the stored yarn 20 to the yarn supplying bobbin 21 side. The clearer 15 detects a yarn defect. The splicer device 14 performs a yarn splicing operation. The first tensor 41 is disposed between the yarn feeding bobbin 21 and the accumulator 61. The second tensor 42 is disposed between the accumulator 61 and the package 30. The unit controller 50 controls the first tensor 41 and the second tensor 42.

  With this configuration, the propagation of the tension fluctuation can be blocked by the accumulator 61 so that the tension fluctuation generated at the beginning or end of winding of the yarn feeding bobbin 21 does not affect the winding operation on the package 30 side. Therefore, even when a large fluctuation in tension occurs in the yarn feeding bobbin 21, the yarn 20 can be continuously wound while the winding tension is kept constant. Even when a yarn defect or yarn breakage occurs or when the yarn feeding bobbin 21 is replaced, the yarn 20 stored in the accumulator 61 is wound around the package, and the yarn 20 is transferred from the accumulator 61 to the yarn feeding bobbin 21 side. Since the yarn joining operation can be performed by pulling out, the winding operation can be continued without reversing the package 30. Furthermore, an appropriate tension can be applied to the yarn 20 before storage in the accumulator 61 by the first tensor 41, and an appropriate tension can be applied to the yarn 20 before winding on the package 30 by the second tensor 42. . Thus, the winding tension can be controlled to be constant throughout the winding operation, and the occurrence of yarn breakage can be effectively prevented. Further, after a predetermined time has elapsed from the start of winding, the package 30 rotates at a constant winding speed, and even when a yarn defect is detected, the winding is stopped (change in winding speed). Because there is no tension variation. As described above, since the winding operation of the package 30 can be continuously performed in a constant state, the high-quality package 30 having a good winding state can be generated.

  Further, the automatic winder of the present embodiment is configured such that the unit controller 50 can adjust the tension applied to the yarn 20 by the second tensor 42 according to the winding speed of the package 30.

  With this configuration, even when the winding speed of the package 30 changes, for example, when the winding speed increases, the tension applied to the yarn 20 is controlled to be weakened, so that the winding tension is kept constant. Winding work can be performed.

  In the present embodiment, the automatic winder includes the plurality of winding units 10. With this configuration, a high-quality package can be produced, and an automatic winder with high production efficiency can be provided.

  In the embodiment described above, the winding speed is not changed after a predetermined time has elapsed from the start of winding, and the winding is performed in a constant state (rated speed). It can also be set as the structure which changes a winding speed at the time of a joining operation | work. Hereinafter, a configuration in which the unit control unit 50 controls the winding speed according to the storage amount of the yarn 20 when the yarn defect is detected will be described with reference to FIG. FIG. 4 is a flowchart showing control of the winding drum 24 and the second tensor 42 when adjusting the amount of yarn stored in the accumulator 61 when detecting yarn defects.

  In the following description of the flowchart, “sufficient yarn amount” means a yarn storage amount sufficient to perform the yarn joining operation at the time of yarn defect detection and bobbin replacement, and the maximum storage state of the accumulator 61 is indicated. This is the yarn amount detected by the first storage sensor 76 to be detected. In the following description of the flowchart, “the state in which the yarn amount is not sufficiently stored” refers to a state in which the yarn is not sufficiently stored to perform the yarn joining operation at the time of yarn defect removal and bobbin replacement. The state where the first storage sensor 76 does not detect the yarn.

  When the flow of FIG. 4 is started, the unit controller 50 checks whether or not a sufficient yarn amount is stored in the accumulator 61 based on the detection values of the storage sensors 76 and 77 (S101). When it is determined that the yarn amount is not sufficiently stored, the unit controller 50 controls the drum drive motor 53 so that the rotation speed of the winding drum 24 is slower (lower speed) than the rated speed ( S102). Further, the tension on the yarn by the second tensor 42 is increased according to the rotation speed of the winding drum 24 so that the winding tension is constant (S103).

  When the yarn defect portion is removed and the yarn joining operation is performed, and the yarn defect removing operation is completed (S104), it is next checked whether or not a sufficient yarn amount is stored in the accumulator 61 by the storage sensors 76 and 77 (S105). . When a sufficient yarn amount is stored, the unit controller 50 controls the drum drive motor 53 to return the rotational speed to the speed before the yarn defect is detected (S106). Then, the second tensor 42 is controlled so as to apply a tension according to the rotational speed of the drum drive motor 53 (S107), and the flow ends.

  On the other hand, if it is determined in S101 that the yarn amount is sufficiently stored, the yarn defect removal operation (S108) is performed as it is without performing the rotation speed of the winding drum 24 and the tension control of the second tensor 42. When the process shifts and the yarn defect removal operation is completed, the flow at the time of finding the yarn defect is terminated.

  As described above, the automatic winder having the configuration shown in FIG. 4 includes the first storage sensor 76 and the second storage sensor 77 for detecting the yarn amount stored in the accumulator 61. Further, the unit control unit 50 controls the winding speed of the package 30 according to the yarn amount, and adjusts the tension applied to the yarn 20 by the second tensor 42 according to the winding speed of the package 30.

  With this configuration, the winding speed of the package 30 can be changed so that the amount of yarn stored in the accumulator 61 is appropriate. Further, when a yarn defect or yarn breakage occurs or when the yarn feeding bobbin 21 is replaced and the amount of yarn stored in the accumulator 61 is small, the winding speed is reduced so that the yarn storage amount does not become zero. Control is also possible. Further, since the second tensioner 42 applies a tension corresponding to the winding speed to the yarn 20, the yarn storage amount of the accumulator 61 can be adjusted while maintaining a constant winding tension.

  Moreover, it can replace with the structure of the said embodiment, and can also comprise so that a winding speed may be reduced automatically at the time of a yarn defect detection and a yarn splicing operation. In this configuration, when a yarn defect is detected, the unit controller 50 controls the drum drive motor 53 to reduce the winding speed and controls the second tensioner 42 to increase the tension on the yarn 20. . Then, after the yarn defect is removed and the yarn joining operation is performed, the rotational speed of the winding drum 24 is returned to the original, and the application of tension by the second tensor 42 is weakened according to the rotational speed of the winding drum 24. Thereby, even when the storage amount of the yarn 20 is small, the yarn 20 can be continuously wound around the package 30.

  Further, when a new yarn feeding bobbin 21 is supplied, the winding speed can be similarly reduced. Specifically, when the yarn feeler 37 detects that the yarn has run out, the unit controller 50 reduces the winding speed, and the tension on the yarn 20 by the second tensor 42 is adjusted in accordance with the decrease in the winding speed. Control to strengthen. In this state, the newly supplied yarn of the yarn supplying bobbin 21 and the yarn joining operation are performed. After the yarn splicing operation is completed, the rotational speed of the winding drum 24 is returned to the original as in the case where the yarn defect is detected, and the tension applied by the second tensor 42 is weakened according to the rotational speed of the winding drum 24. .

  Although the preferred embodiment of the present invention has been described above, the above configuration can be further modified as follows.

  In addition to the configuration of the above embodiment, the rotation of the winding drum 24 may be stopped when a certain condition is satisfied. For example, when yarn defect detection by the clearer 15 occurs three times in succession, it is possible to assume that a defective yarn feeding bobbin has been supplied and stop winding.

  In the above-described embodiment, the first tensor 41 and the second tensor 42 for controlling the tension are gate-type. However, instead of this configuration, a disk-type tensor is used, etc. The configuration can be changed as appropriate. Further, instead of the first tensor 41 of the above-described embodiment, tension control between the yarn feeding bobbin 21 and the accumulator 61 may be performed by the yarn unwinding assist device 12. Further, in place of the above-described embodiment, the control of the tensor is appropriately changed within the scope of the present invention, such as controlling the first tensor 41 and the second tensor 42 in cooperation during the yarn splicing operation such as when detecting a yarn defect. can do.

  Moreover, in the said embodiment, although the yarn amount currently stored by the accumulator 61 is detected using the two storage sensors 76 and 77, the detection methods of the yarn amount, such as using three or more storage sensors, are used, for example. It can be changed as appropriate.

  In the above-described embodiment, the yarn storage amount of the accumulator 61 is detected using the two storage sensors 76 and 77 as the yarn storage amount detection means, and the unit controller 50 controls the drum drive motor 53 according to the detected yarn storage amount. Although the (winding drive unit) is controlled, a monitoring unit that monitors the occurrence frequency of yarn defect removal may be provided as the yarn accumulation amount detection means, and the drum drive motor 53 may be controlled based on the monitoring result. For example, when the monitoring unit detects that the yarn defect removal operation has occurred a plurality of times in a predetermined period, the unit controller 50 winds the package 30 around the accumulator 61 while the yarn defect removal operation is completed. It is determined that there is no yarn storage amount corresponding to the yarn length to be taken. The unit controller 50 that determines that there is no yarn storage amount controls the drum drive motor 53 at a low speed. This also enables the winding operation to be performed while appropriately maintaining the yarn storage amount of the accumulator 61. Further, the monitoring unit can control the drum drive motor 53 in consideration of not only the yarn defect removal but also the occurrence timing of the yarn feeding bobbin replacement operation and the yarn defect removal.

  Moreover, although the winding unit 10 of the said embodiment is the structure which supplies the yarn feeding bobbin 21 with a magazine type supply apparatus, it is not necessarily limited to this structure. For example, a configuration in which the yarn feeding bobbin 21 is supplied to the winding unit 10 by conveying a tray on which the yarn feeding bobbin 21 is set along an appropriate path may be used.

The front view which showed the schematic structure of the winding unit which concerns on one Embodiment of this invention. The schematic cross section which showed the mode of the accumulator of this embodiment. A graph showing the relationship between winding speed and tension applied by a tensioner for each yarn count. The flowchart which showed control of the 2nd tensor in the case of adjusting a winding speed with the yarn quantity stored in an accumulator at the time of a yarn defect detection.

Explanation of symbols

10 Winding unit 14 Splicer device 15 Clearer (yarn defect detector)
21 Yarn feeding bobbin 30 Package 41 First tensioner (first tension control means)
42 Second tensioner (second tension control means)
50 Unit control unit 53 Drum drive motor (winding drive unit)
55 Servo motor 61 Accumulator (yarn storage device)

Claims (6)

In a yarn winding device for winding a yarn drawn from a replaceable yarn feeding bobbin into a package,
A tension transmission blocking mechanism that blocks transmission of tension fluctuation generated on the yarn feeding bobbin side and prevents transmission of tension fluctuation to the package;
A yarn winding device comprising: tension control means for flexibly controlling the tension of the yarn wound around the package. The yarn winding device according to claim 1,
A yarn winding device comprising: another tension control means for flexibly controlling a tension applied to the yarn from the yarn feeding bobbin to the tension transmission blocking mechanism. In a yarn winding device for winding a yarn drawn from a replaceable yarn feeding bobbin into a package,
A winding drive for rotating the package;
A yarn storage device capable of storing the yarn before being wound around the package, and drawing out the stored yarn to the yarn feeding bobbin side;
A yarn defect detector for detecting a yarn defect;
A yarn joining section for performing the yarn joining operation;
First tension control means disposed between the yarn feeding bobbin and the yarn accumulating device;
Second tension control means disposed between the yarn storage device and the package;
A control unit for controlling the first tension control unit and the second tension control unit;
A yarn winding device comprising: The yarn winding device according to claim 3,
The yarn winding device, wherein the control unit can adjust a tension applied to the yarn by the second tension control unit according to a winding speed of the package. The yarn winding device according to claim 4,
A yarn storage amount detecting means for detecting a yarn storage amount of the yarn storage device;
The control unit changes the winding speed of the package according to the amount of yarn stored in the yarn storage device, and the tension applied to the yarn by the second tension control unit according to the changed winding speed. A yarn winding device characterized in that the yarn winding device can be adjusted.   An automatic winder comprising a plurality of yarn winding devices according to any one of claims 1 to 5.

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