JP2010047406A - Yarn winding device and automatic winder with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn winding device capable of precisely measuring the length of a yarn wound onto a package. <P>SOLUTION: A winding unit 10 of an automatic winder is configured to wind the yarn of a prescribed length onto the package 30. This winding unit 10 is provided with a yarn pool section 71, a servomotor 55, and a yarn length control section 90. The yarn pool section 71 is configured to store the yarn before being wound onto the package 30. The servomotor 55 is driven for feeding the yarn to the yarn pool section 71. The yarn length control section 90 is configured to count the normal rotation pulse signal of the servomotor 55 by a feed count section 91 so that the yarn of the prescribed length is wound onto the package 30. Then, the length of the yarn wound onto the package 30 is calculated based on the count value of the normal rotation pulse signal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a yarn winding device and an automatic winder, and more particularly to control of the length of a yarn wound on a package.

  A package formed by joining yarns of a yarn feeding bobbin by a yarn winding device (automatic winder) is sent to a warper process as a subsequent process when used as a warp. In this warper process, a number of package yarns are simultaneously wound on a common beam with uniform tension. Therefore, when the yarn length varies between packages, the winding operation is performed based on the package having the shortest winding length. Therefore, in other packages, the yarn of the package having the shortest winding length is used. The yarn exceeding the length is discarded as a large amount of wasted yarn.

In order to suppress the generation of this waste yarn, there has been proposed a yarn winding device configured to perform winding work while monitoring the yarn speed and the yarn length so that the yarn length does not vary for each package. Yes. For example, Patent Document 1 discloses such a yarn winding device. The yarn winding part of the textile machine of Patent Document 1 has a device for determining the yarn length passing through the yarn sensor with high accuracy and an evaluation device for accumulating the passed yarn length. The apparatus for determining the passing yarn length with high accuracy includes a measuring head provided with two measuring points arranged one after the other in the moving direction of the passing yarn, and a traveling for processing the detected measurement value. Has a time correlator. The thread winding location is provided with a device for determining the yarn length to be removed within the range of the yarn coupling device. When the yarn is cut by detecting a yarn defect, the evaluation device is configured to subtract the removed yarn length from the yarn length derived from the yarn length that has passed through the yarn sensor. Patent Document 1 states that this can improve the maintenance of a predetermined yarn length for the traverse bobbin.
JP 2002-348044 A

  However, the configuration in which the yarn is directly sensed by the measuring head as in Patent Document 1 requires a complicated calculation (for example, by the travel time correlator) to determine the yarn speed and the yarn length to be wound. It has become a cause of complexity and high cost.

  On the other hand, in the yarn winding device, it is also conceivable to calculate the wound yarn speed and yarn length based on the rotation of a winding drum that drives the package. However, in the actual winding operation of the package, the rotational speed of the winding drum may not match the yarn speed wound on the package. For example, since the winding diameter of the cone winding package is different in the axial direction, the yarn speed actually wound varies depending on the winding position. Also, in the cheese winding package, for example, when control is performed to slip the package with respect to the winding drum in order to avoid the dangerous winding number of the ribbon winding, the rotation speed of the winding drum and the actual yarn speed There will be a gap between them. Therefore, in the case of control based on the rotation of the winding drum, it is difficult to control the yarn length with high accuracy, and waste yarns cannot be effectively suppressed.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a yarn winding device and an automatic winder having a simple configuration capable of accurately measuring the length of a yarn wound around a 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 the first aspect of the present invention, the following configuration is provided in a yarn winding device that winds a predetermined length of yarn around a package. That is, the yarn winding device includes a yarn pool unit, a yarn storage drive unit, and a count unit. The yarn pool section stores yarn before being wound around the package. The yarn storage drive unit is driven to supply yarn to the yarn pool unit. The counting unit counts a driving amount of the yarn storage driving unit. Then, the yarn length wound around the package is calculated from the count value of the driving amount.

  Thereby, by counting the drive amount of the yarn storage drive unit, the yarn length wound around the package can be measured at a stage before the yarn is actually wound around the package. Therefore, it is possible to accurately calculate the length of the yarn wound around the package without being affected by the winding operation of the package. As a result, the yarn length for each package can be accurately aligned, so that the yarn can be prevented from being unwound and the productivity of the package can be improved.

  The yarn winding device is preferably configured as follows. That is, the yarn winding device includes a yarn joining device that is arranged on the upstream side of the yarn pool portion in order to perform the yarn joining operation. The counting unit counts a driving amount of the yarn storage driving unit when the yarn is pulled out from the yarn pool unit to the upstream side during the yarn joining operation. And, before the yarn joining operation is performed, a supply count value obtained by counting the driving amount of the yarn storage driving unit driven to supply yarn to the yarn pool unit, and for the yarn joining operation, The length of the yarn wound around the package is calculated in consideration of the return count value obtained by counting the driving amount when the yarn is pulled out from the yarn pool portion to the upstream side.

  As a result, the yarn length returned from the yarn pool portion to the upstream side can be accurately calculated by counting the drive amount of the yarn storage drive portion during the yarn splicing operation. In addition, since the yarn length calculated in this manner is taken into account, the yarn length wound around the package can be calculated more accurately.

  The yarn winding device is preferably configured as follows. That is, the yarn winding device includes a yarn feeding bobbin setting unit that can be set by exchanging the yarn feeding bobbin for supplying the yarn wound around the package. When the yarn feeding bobbin is replaced, the drive amount of the yarn storage driving unit when the yarn having the necessary length is drawn from the yarn pool unit to the upstream side for the yarn joining operation is counted as the return count value. Then, the yarn length wound around the package is calculated in consideration of the return count value and the supply count value.

  Thereby, the yarn length of the package formed by joining the yarns of the plurality of yarn supplying bobbins can be accurately calculated.

  The yarn winding device is preferably configured as follows. That is, the yarn winding device includes a yarn defect detector for detecting a yarn defect upstream of the yarn pool section. When the yarn defect detector detects a yarn defect, a yarn defect length is calculated from a count value obtained by counting the drive amount of the yarn storage drive unit while the yarn defect detector detects a yarn defect. .

  Thereby, the length of the yarn defect portion detected by the yarn defect detector can be accurately calculated by counting the drive amount.

  According to the 2nd viewpoint of this invention, the automatic winder provided with two or more said yarn winding apparatuses is provided.

  As a result, it is possible to provide an automatic winder that can suppress variations in the yarn length of the packages formed by each of the yarn winding devices and can form a package that is accurately managed at a constant length.

  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 according to an embodiment of the present invention.

  A winding unit (yarn winding device) 10 shown in FIG. 1 winds a yarn 20 unwound from a yarn supplying bobbin 21 while winding it around a winding bobbin 22 to form a package 30 having a predetermined length and a predetermined shape. is there.

  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 winding unit main body 16 supported by a unit frame (not shown).

  As shown in FIG. 1, the winding unit main body 16 includes a yarn supplying portion 5, a yarn joining portion 6, a yarn defect detecting portion 7, a yarn accumulating portion 8, and a winding portion 9. . In the following description, the upstream side and the downstream side in the traveling direction of the yarn 20 may be simply referred to as “upstream side” and “downstream side”.

  The yarn supplying unit 5 includes a yarn supplying bobbin holding unit (yarn supplying bobbin setting unit) 60, a yarn unwinding assisting device 12, and a first tensor 41.

  The yarn supplying bobbin holding unit 60 is configured so that the yarn supplying bobbin 21 for supplying the yarn 20 can be replaced and set. A bobbin supply device (not shown) for supplying a new yarn supplying bobbin 21 to the yarn supplying bobbin holding unit 60 is connected to the yarn supplying bobbin holding unit 60. As this bobbin supply device, for example, a magazine type supply device or a tray type supply device can be adopted.

  When all the yarns 20 are pulled out from the yarn supplying bobbin 21 set in the yarn supplying bobbin holding unit 60 and become an empty bobbin, the yarn supplying unit 5 discharges the empty bobbin from the yarn supplying bobbin holding unit 60. The bobbin supply device can sequentially supply new yarn supplying bobbins 21 to the yarn supplying bobbin holding portion 60 from which the empty bobbins are discharged.

  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. A sensor (not shown) for detecting the chase portion of the yarn feeding bobbin 21 is provided in the vicinity of the regulating member 40. When the sensor detects that the chase portion is lowered, control is performed to lower the restricting member 40 by, for example, an air cylinder (not shown).

  In the vicinity of the yarn unwinding assisting device 12, a yarn feeler (upstream yarn detecting sensor) 37 capable of detecting the presence or absence of the yarn 20 is provided. 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. As this 1st tensor 41, the gate type thing which arrange | positions a movable comb tooth with respect to a fixed comb tooth can be used, for example. The movable comb teeth can be rotated by a rotary solenoid (not shown) so that the comb teeth are engaged or released. The first tensor is not limited to a gate type, and a disk type tensor can be used, for example.

  The yarn joining portion 6 is disposed on the downstream side of the yarn supplying portion 5. The yarn joining section 6 includes a splicer device (yarn joining device) 14 that performs a yarn joining operation, a downstream yarn guide pipe (downstream yarn catching means) 26, and an upstream yarn guide pipe (upstream yarn catching means). 25.

  The splicer device 14 detects an upstream yarn on the yarn feeding bobbin 21 side and a downstream side on the package 30 side when a clearer 15 described later detects a yarn defect or when the yarn breaker is being unwound from the yarn feeding bobbin 21. The side thread is spliced. As the splicer device 14, a mechanical device, a device using a fluid such as compressed air, or the like can be used.

  On the lower side and the upper side of the splicer device 14, an upstream yarn guide pipe 25 that catches and guides the upstream yarn on the yarn feeding bobbin 21 side, and a downstream yarn that catches and guides the downstream yarn on the package 30 side. A guide pipe 26 is provided.

  The downstream-side yarn guide pipe 26 is rotatable about a shaft 35 between a catching position for catching the downstream-side yarn and a guide position for guiding the captured downstream-side yarn to the splicer device 14. It is configured. The upstream yarn guide pipe 25 rotates around the shaft 33 between a capture position for capturing the upstream yarn and a guide position for guiding the captured upstream yarn to the splicer device 14. It is configured to be movable.

  A suction port 32 is formed at the tip of the upstream yarn guide pipe 25, and similarly, a suction port 34 is formed at the tip of the downstream yarn guide pipe 26. Appropriate negative pressure sources are connected to the upstream yarn guide pipe 25 and the downstream yarn guide pipe 26, respectively, and a suction flow can be applied to the suction port 32 and the suction port 34.

  The yarn defect detecting unit 7 is disposed on the downstream side of the yarn joining unit 6. The yarn defect detector 7 includes a clearer (yarn defect detector) 15 that monitors the thickness of the traveling yarn 20.

  The clearer 15 includes an appropriate sensor, and a signal from the sensor is processed by the analyzer 52 so that a yarn defect such as a slab 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.

  In the vicinity of the clearer 15, a cutter (yarn cutting means) 18 for cutting the yarn when the clearer 15 detects a yarn defect is disposed. Further, on the downstream side of the clearer 15, a waxing device 17 for waxing the running yarn is disposed. Furthermore, a suction part (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 yarn storage unit 8 is disposed on the downstream side of the yarn defect detection unit 7. Further, the yarn storage unit 8 includes an accumulator (yarn storage device) 61 that can store the yarn 20 unwound from the yarn supplying bobbin 21 in the yarn pool unit 71. The yarn 20 unwound 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 to both the upstream side and the downstream side simultaneously. With this configuration, the yarn joining operation can be performed by drawing the yarn 20 to the yarn feeding bobbin 21 side in parallel with winding the stored yarn 20 around the package 30. Details of the configuration of the accumulator 61 will be described later.

  The winding unit 9 is disposed on the downstream side of the yarn storage unit 8. The winding unit 9 includes a cradle 23 configured to hold the winding bobbin 22, a winding drum (traverse drum) 24 for traversing the yarn 20 and rotating the winding bobbin 22, A second tensor 42.

  The cradle 23 is configured to be swingable in a direction close to or away from the take-up drum 24, thereby absorbing an increase in the diameter of the package 30 accompanying the take-up of the yarn 20. 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.

  The second tensor 42 is arranged on the downstream side of the accumulator 61 and controls the tension generated when the yarn 20 is unwound from the accumulator 61. 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, similarly to the first tensor 41, a gate type or a disk type in which movable comb teeth are arranged with respect to fixed comb teeth can be used.

  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 drive motor 53, and the operation of the drum drive 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.

  In addition, when the number of rotations of the winding drum 24 and the package 30 is an integral multiple or a fraction of an integer during winding of the package 30, the traverse cycle and the winding cycle of the package 30 are synchronously wound. A so-called ribbon winding occurs in which yarns gather and overlap at the same location. In the package 30 in which the ribbon winding is generated, the yarns are easily entangled with each other, and there is a problem that yarn breakage occurs when the yarn is unwound in a later process. In consideration of this point, the unit control unit 50 (motor control unit 54) of the present embodiment rapidly increases / decreases the rotation of the winding drum 24 in the vicinity of the ribbon winding generation diameter to thereby reduce the package 30 and the winding drum 24. Slip is generated between them and the yarn path of the traversing yarn is dispersed and wound up (disturb control). As a result, the ribbon winding can be broken and the package 30 having excellent unwinding properties can be formed.

  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 yarn pool 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 yarn pool portion 71 is disposed above the collar portion 79. The thread pool 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 to which tip portions of the plurality of rod members 82 are connected. And a mounting plate 83 having a shape. Further, the yarn pool 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 storage guide arm 75 described later can rotate inside the gap. ing.

  The support plate 81 is arranged horizontally, and a plurality of rod members 82 are arranged on the upper surface of the support plate 81 at equal intervals on the circumference. The yarn pool portion 71 is configured to form a substantially cylindrical shape by these rod members 82. The yarn 20 is stored in the yarn pool portion 71 by winding the yarn 20 around the outer periphery of the yarn pool portion 71.

  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 a lower portion (an end portion opposite to the yarn pool portion 71) of the cylindrical portion 78, and the yarn 20 drawn from the yarn feeding bobbin 21 is introduced into the introduction hole 80. Is guided to the yarn guide 72.

  A rotating shaft 73 is disposed inside the cylindrical portion 78, and the rotating shaft 73 is supported so as to be rotatable relative to the rotating shaft casing 70 and the yarn pool portion 71. A servomotor (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 storage guide arm (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 storage guide arm 75 extends in the radial direction so as to pass through the gap between the rotary 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 a rotary shaft. It is configured to protrude slightly from the casing 70. The storage guide arm 75 is configured to rotate integrally with the rotation shaft 73. The interior of the storage guide arm 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 storage guide arm 75 and is discharged from the tip of the storage guide arm 75. As a result, the yarn pool portion 71 is guided to the side surface portion. Accordingly, when the servo motor 55 is driven in the forward direction, the storage guide arm 75 rotates together with the rotary shaft 73, whereby the yarn 20 is wound around the side surface portion. Further, when returning the yarn 20 from the accumulator 61 to the upstream side, the servo motor 55 is set in a neutral (free rotation) state, and the downstream yarn guide pipe 26 rotates downward with the downstream yarn end sucked and captured. As a result, the yarn 20 is pulled out upstream. At this time, the storage guide arm 75 rotates in the direction of pulling out the yarn together with the rotary shaft 73 as the yarn 20 is pulled out, and the servo motor 55 is in a direction opposite to the driving direction for winding the yarn 20 around the yarn pool portion 71. It is rotated backward.

  Each of the plurality of rod members 82 arranged in the yarn pool portion 71 is arranged so as to incline inwardly of the yarn pool portion 71 from the end portion on the support plate 81 side toward the end portion on the attachment plate 83 side. Yes. Since a constant tension is applied to the yarn 20 by the first tensioner 41, the yarn wound around the yarn pool portion 71 naturally moves so as to slide upward due to the inclination of the rod member 82. Accordingly, when the yarn 20 is continuously wound by the storage guide arm 75, the yarn wound around the inclined portion moves upward, so that the side portion constituted by the rod member 82 has no yarn. 20 is stored in a state of being arranged in a spiral.

  In the present embodiment, since the servo motor 55 is used as the yarn storage drive unit of the storage guide arm 75, the rotation of the storage guide arm 75 can be stopped or accelerated / decelerated accurately. This makes it possible to accurately control the supply length and timing when supplying the yarn 20 to the yarn pool section 71, the return length and timing when returning the yarn 20 from the yarn pool section 71 to the upstream side, and various operations. Can be done more smoothly.

  As shown in FIG. 1, the winding unit 10 includes a first storage sensor 76 disposed on the upper portion of the yarn pool portion 71 and a second storage sensor 77 disposed on the lower portion of the yarn pool 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 yarn pool portion 71 so as to detect the yarn wound around the upper end side of the rod member 82 constituting the yarn pool portion 71, and detects the maximum storage state of the accumulator 61. . The second storage sensor 77 is arranged on the downstream side of the yarn pool portion 71 so as to detect the yarn wound on the lower end side of the rod member 82, and detects the shortage of yarn storage in the accumulator 61. The unit control unit 50 controls the rotation speed of the servo motor 55 (the supply speed of the yarn 20 to the yarn pool unit 71) based on the yarn detection signals 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.

  The speed at which the yarn 20 is wound around the yarn pool portion 71 in the accumulator 61 (in other words, the yarn supply speed to the yarn pool portion 71) is increased with time at the time when the winding of the yarn is started. The speed is controlled to be equal to or higher than the yarn winding speed. When a predetermined amount of time has elapsed from the start of winding and the amount of yarn necessary for the yarn splicing operation is stored in the accumulator 61, the yarn is wound around the yarn pool portion 71 at a speed equal to the yarn winding speed of the package 30. Control is performed to maintain the amount of yarn stored. 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 yarn pool portion 71, it is preferable to always maintain a state in which yarns exceeding the necessary yarn amount are stored.

  The yarn 20 unwound from the yarn pool portion 71 of the accumulator 61 is wound on the package 30 driven by the winding drum 24. At this time, the tension applied to the yarn 20 by the second tensor 42 is controlled by the unit controller 50 according to the winding speed.

  Next, the unit controller 50 will be described. The unit controller 50 is configured as a microcomputer that includes a CPU and a storage unit. As shown in FIG. 1, the unit control unit 50 is connected to the yarn feeding unit 5, the yarn joining unit 6, the yarn defect detecting unit 7, the yarn storage unit 8, the winding unit 9, and the like of the winding unit body 16. Control the entire winding operation. Further, an unillustrated setter for performing various settings is connected to the unit controller 50.

  As shown in FIG. 1, the unit controller 50 is electrically connected to a servo motor 55. The unit controller 50 also includes a yarn length controller 90 that controls the length of the yarn wound around the package 30 by controlling the drive of the servo motor 55. The yarn length control unit (counting unit) 90 includes a supply count unit 91, a return count unit 92, a supply length calculation unit 93, and a comparison unit 94 as main components.

  When the servo motor 55 rotates in a direction to supply the yarn 20 to the yarn pool unit 71, the supply count unit 91 counts the positive rotation pulse signal (drive amount) from the servo motor 55 and updates the supply count value. .

  When the servo motor 55 rotates in the direction to draw the yarn 20 upstream from the yarn pool unit 71, the return count unit 92 counts the reverse rotation pulse signal (drive amount) from the servo motor 55 and calculates the return count value. Update. The drive amount here indicates the drive amount by which the servo motor 55 is driven in the reverse direction by drawing the yarn to the upstream side of the yarn pool portion 71. The driving amount is not limited to the case where the servo motor 55 is passively driven by drawing the yarn. For example, when the servo motor 55 is spontaneously reversely rotated when the yarn is drawn from the yarn pool portion 71 to the upstream side, the return count portion 92 also counts the drive amount that spontaneously reversely rotates. become.

  Based on the supply count value and the return count value, the supply length calculation unit 93 accumulates the accumulated length of the yarn length supplied to the yarn pool unit 71 up to the present time (however, the yarn length returned to the upstream side again after supply) (Hereinafter referred to as “supply yarn length cumulative value”).

  The comparison unit 94 determines whether or not the yarn 20 having a length sufficient to fill the package 30 is stored in the yarn pool unit 71 side. In the unit controller 50, a set winding length that is a yarn length to be wound in order to complete the package 30 is set in advance by the setting device or the like. The comparison unit 94 determines whether or not the package 30 is fully wound when it is assumed that all the yarns 20 currently stored in the yarn pool unit 71 are wound on the package 30. Is compared with the set winding length. When the package 30 is fully wound by winding the yarn 20 stored in the yarn pool portion 71 at this time, the unit control unit 50 causes all the yarns 20 in the yarn pool portion 71 to be wound around the package 30. Wait until it is judged full.

  Next, winding of the yarn by the winding unit 10 having the above configuration will be described. First, as a preparatory work, a new empty winding bobbin 22 is set in the cradle 23 of the winding unit main body 16 in a state where the yarn is not stored in the yarn pool portion 71. In addition, the yarn supplying bobbin 21 is set in the yarn supplying bobbin holding portion 60, and the yarn 20 is pulled out from the yarn supplying bobbin 21 and attached to the winding bobbin 22.

  Thereafter, when the unit control unit 50 is instructed to start winding, the unit control unit 50 first resets the supply count value and the return count value to zero. Thereafter, the unit controller 50 sequentially starts driving the accumulator 61 and the winding drum 24.

  When the servo motor 55 of the accumulator 61 starts winding the yarn around the yarn pool unit 71, a signal indicating the rotation state of the servo motor 55 is input to the unit control unit 50. The supply count unit 91 adds a supply count value based on a pulse signal that is output every time the servo motor 55 rotates a predetermined angle in the forward direction. The yarn 20 stored in the yarn pool section 71 is eventually drawn further downstream, and taken up by the package 30 driven by the take-up drum 24.

  If, for example, the clearer 15 detects a yarn defect during the winding, the unit controller 50 cuts the yarn 20 with the cutter 18 and sets the servo motor 55 of the accumulator 61 to neutral (free), and sets the downstream yarn end to the yarn end. It is captured by the downstream yarn guide pipe 26. Then, the yarn 20 is pulled upstream by rotating the downstream yarn guide pipe 26 downward. As a result, the storage amount of the yarn 20 in the accumulator 61 (yarn pool portion 71) is reduced. The return count unit 92 adds the return count value based on the pulse signal output every time the servo motor 55 is rotated (driven) by a predetermined angle in the reverse direction.

  The yarn 20 unwound from the yarn pool section 71 to the upstream side by the downstream yarn guide pipe 26 is guided to the splicer device 14 to cut out the defective portion of the yarn and to connect the yarn 20 on the yarn supplying bobbin 21 side and the yarn splicing. Is done. Details of the control at the time of yarn defect detection will be described later.

  When the yarn feeler 37 detects that all the yarns of the yarn feeding bobbin 21 have been unwound during winding, the unit controller 50 sets the servo motor 55 of the accumulator 61 to neutral (free) and guides the downstream yarn. The thread 26 is pulled out upstream by the pipe 26. The return count unit 92 adds the return count value based on the pulse signal that is output each time the servo motor 55 is rotated by a predetermined angle in the reverse direction, as in the case of detecting the yarn defect. The yarn 20 unwound upstream from the yarn pool portion 71 is drawn out to the splicer device 14 by the downstream yarn guide pipe 26, and the yarn 20 and the yarn splicing of the yarn feeding bobbin 21 newly set in the yarn feeding bobbin holding portion 60. Is done. Details of the control at the time of replacing the yarn feeding bobbin will be described later.

  The supply length calculation unit 93 subtracts the return count value from the supply count value and multiplies the result by a predetermined constant, thereby obtaining the cumulative value of the yarn length supplied to the yarn pool unit 71 up to the present time (the supply value) (Thread length cumulative value) is calculated. Here, all of the yarn 20 supplied to the yarn pool section 71 is wound around the package 30 as long as the yarn 20 is not pulled out upstream. Accordingly, the accumulated yarn length accumulated value at the present time corresponds to a value obtained by adding the length of the yarn to be wound in the near future to the length already wound on the package 30.

  The comparison unit 94 compares the accumulated supply yarn length value obtained by the supply length calculation unit 93 with a predetermined set winding length. If the accumulated value of the supplied yarn length is equal to or greater than the set winding length, the supply of the yarn 20 to the yarn pool portion 71 is no longer necessary, and the drive of the servo motor 55 is stopped. Thereafter, the unit control unit 50 continues to drive the winding drum 24 until all the yarns 20 stored in the yarn pool unit 71 are wound on the package 30. Thereafter, a doffing operation for removing the full package 30 from the cradle 23 is performed by using a doffing device (not shown) or the like.

  The unit control unit 50 controls the servo motor 55 as described above to adjust the yarn length stored in the yarn pool unit 71, and finally controls the yarn length wound around the package 30. Here, as described above, the storage (supply) of the yarn 20 to the yarn pool portion 71 is performed by rotating the storage guide arm 75 and winding the yarn 20 around the side surface portion of the yarn pool portion 71. Therefore, the length of the yarn to be stored can be accurately and easily calculated based on the rotation angle of the storage guide arm 75 and the diameter of the yarn winding portion of the yarn pool portion 71.

  In addition, the yarn length control unit 90 does not directly calculate the winding length in the winding unit 9, but calculates the accumulated yarn length accumulated value in the yarn storage unit 8 at the previous stage. Therefore, it is possible to accurately determine whether or not a predetermined length of yarn has been wound around the package 30 by eliminating the influence of errors caused by the winding operation such as slippage of the package 30 due to the disturb control.

  Further, when the yarn 20 on the yarn pool portion 71 side needs to be pulled out to the splicer device 14 for the yarn splicing operation, the pulling length counts the angle (number of times) at which the servo motor 55 is rotated in the reverse direction. Can be calculated accurately. Specifically, the length of the yarn returned (drawn) upstream from the yarn pool portion 71 is accurately and easily calculated based on the reverse rotation angle of the storage guide arm 75 and the diameter of the yarn winding portion of the yarn pool portion 71. can do. Accordingly, in determining whether or not a predetermined length of yarn has been wound around the package 30, the influence of the yarn joining operation that occurs in the winding process of the yarn 20 can be accurately taken into consideration.

  In addition, since the winding unit 10 of the present embodiment has a configuration in which a constant yarn length is stored in the yarn pool portion 71 of the yarn storage portion 8, the accumulated yarn length accumulated value in the yarn storage portion 8 immediately becomes the package 30. It is not the length of the yarn wound on the wire. However, by calculating the supply yarn length cumulative value in consideration of the storage amount when the winding of the package 30 is started and the storage amount when the winding of the package 30 is finished, The yarn length actually wound around the package 30 can be easily calculated.

  Next, control 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 the yarn defect detection signal, the unit controller 50 stops the servo motor 55 of the accumulator 61 and stops the rotation of the storage guide arm 75. Further, the unit controller 50 drives the cutter 18 to cut the yarn 20. As a result, the yarn downstream from the cut portion is stopped below the introduction hole 80 of the accumulator 61. If the yarn 20 is stopped below the introduction hole 80 of the accumulator, the yarn 20 may be controlled to be cut by the cutter 18 simultaneously with the rotation stop control of the storage guide arm 75.

  The unit control unit 50 calculates the yarn length of the portion having the yarn defect based on the angle (number of times) of the storage guide arm 75 rotating in the forward direction from the time when the clearer 15 detects the yarn defect. Can do. That is, the forward rotation pulse signal from when the detection signal from the clearer 15 is received until the defect is not detected is counted, and the yarn length of the yarn defect portion is calculated based on this count value.

  Next, the unit controller 50 sucks and captures the downstream yarn located below the introduction hole 80 of the accumulator 61 by the downstream yarn guide pipe 26, and causes the downstream yarn guide pipe 26 to be below the splicer device 14. Rotate to the guide position. As a result, the yarn 20 having the yarn defect portion is pulled out from the yarn pool portion 71 by the downstream yarn guide pipe 26. Then, the return count unit 92 adds the return count value based on the pulse signal of the servo motor 55 that reverses when the yarn 20 is pulled out. At this time, the yarn length obtained by adding the yarn length having the yarn defect portion and the length necessary for the yarn splicing operation is unwound from the yarn pool portion 71 and drawn to the upstream side. As the yarn length necessary for the yarn joining operation, a value set in advance based on the positional relationship between the accumulator 61 and the splicer device 14 can be used.

  The unit controller 50 sucks and captures the upstream yarn by the upstream yarn guide pipe 25 and rotates the upstream yarn guide pipe 25 to the guide position above the splicer device 14. When the upstream yarn guide pipe 25 and the downstream yarn guide pipe 26 guide the upstream yarn end and the downstream yarn end to the splicer device 14, the splicer device 14 starts the yarn splicing operation. The yarn end portion of the downstream yarn including the yarn defect is cut and removed by the cutter of the splicer device 14.

  Since the above-described yarn joining operation is performed in parallel with the winding operation of the yarn 20 onto the package 30, the yarn defect can be removed without stopping and reversing the winding drum 24. When the yarn splicing operation is completed, the servo motor 55 starts normal rotation and resumes the supply of the yarn to the accumulator 61. Thereby, the update of the supply count value is resumed. The supply length calculation unit 93 calculates the supply yarn length accumulated value as needed in consideration of the supply count value and the return count value.

  Next, control 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.

  Next, the unit control unit 50 sets the servo motor 55 to neutral (free) and controls the downstream yarn guide pipe 26 to draw out the yarn having a length necessary for the yarn joining operation from the accumulator 61 to the upstream side. The length required for the yarn joining operation is set in advance in consideration of the positional relationship from the accumulator 61 to the splicer device 14 so as to include the yarn removed by the yarn joining operation. Then, when the yarn 20 is drawn upstream, the servo motor 55 is reversed, and the return count unit 92 adds the return count value based on the pulse signal indicating the reverse rotation of the servo motor 55.

  The empty yarn supplying bobbin 21 is discharged from the yarn supplying bobbin holding unit 60, and a new yarn supplying bobbin 21 is supplied to the yarn supplying bobbin holding unit 60. Thereafter, as in the case where a yarn defect is detected, the downstream yarn on the accumulator 61 side is captured by the downstream yarn guide pipe 26 and pulled out to the splicer device 14, and the upstream yarn from the new yarn supplying bobbin 21 is drawn. It is captured by the upstream yarn guide pipe 25 and pulled out to the splicer device 14. Then, after splicing the downstream yarn and the upstream yarn by the splicer device 14, the servo motor 55 is controlled to rotate the storage guide arm 75 again in the direction in which the yarn 20 is stored. Thereby, the update of the supply count value is resumed. The supply length calculation unit 93 calculates the supply yarn length accumulated value as needed in consideration of the supply count value and the return count value.

  It is preferable to control the supply speed of the yarn 20 to the yarn pool section 71 to be higher than the winding speed of the package 30 at least immediately after the completion of the yarn splicing operation. Thereby, the storage amount of the yarn pool part 71 decreased during the yarn splicing operation can be quickly recovered.

  As described above, the winding unit 10 of the present embodiment is configured to wind a yarn having a predetermined length around the package 30. The winding unit 10 includes a yarn pool unit 71, a servo motor 55, and a yarn length control unit 90. The yarn pool unit 71 stores the yarn 20 before being wound around the package 30. The servo motor 55 is driven to supply the yarn 20 to the yarn pool portion 71. The yarn length control unit 90 counts the forward rotation pulse signal of the servo motor 55. Then, the yarn length wound around the package is calculated from the count value of the forward rotation pulse signal.

  Thus, by counting the positive rotation pulse signal of the servo motor 55, the yarn length wound around the package 30 can be measured at a stage before the yarn is actually wound around the package 30. Therefore, even when the package 30 slips by performing disturb control in the winding operation as in this embodiment, the length of the yarn wound around the package 30 is accurately calculated without being affected by the slip. can do. As a result, the yarn lengths for each package 30 can be accurately aligned. Therefore, when the yarns 20 of the package 30 are used as warp yarns in a warper process as a post process, for example, they are discarded as parts where the yarn lengths are not uniform. It is possible to reduce the amount of wasted yarn and improve the productivity of a series of processes.

  Further, the winding unit 10 of the present embodiment includes a splicer device 14 disposed on the upstream side of the yarn pool portion 71 in order to perform the yarn splicing operation. The yarn length control unit 90 counts the reverse rotation pulse signal of the servo motor 55 when the yarn is pulled out from the yarn pool unit 71 to the upstream side during the yarn joining operation. Then, before the yarn splicing operation is performed, a supply count value obtained by counting the positive rotation pulse signal of the servo motor 55 that is driven to supply the yarn 20 to the yarn pool section 71, and for the yarn splicing operation The yarn length wound around the package 30 is calculated in consideration of the return count value obtained by counting the reverse rotation pulse signal when the yarn is drawn from the yarn pool section 71 to the upstream side.

  Thereby, the yarn length returned from the yarn pool part 71 to the upstream side can be accurately calculated by counting the reverse rotation pulse signal of the servo motor 55 during the yarn joining operation. In addition, since the yarn length calculated in this manner is taken into consideration, the yarn length wound around the package 30 can be calculated more accurately.

  Further, the winding unit 10 of the present embodiment includes a yarn supplying bobbin holding portion 60 that can be set by exchanging the yarn supplying bobbin 21 for supplying the yarn 20 wound around the package 30. When the yarn feeding bobbin 21 is replaced, the reverse rotation pulse signal of the servo motor 55 when the yarn having a necessary length is pulled out from the yarn pool portion 71 for the yarn joining operation is counted as a return count value. Then, the yarn length wound around the package 30 is calculated in consideration of the return count value and the supply count value.

  Thereby, the yarn length of the package 30 formed by joining the yarns of the yarn feeding bobbin 21 can be accurately calculated.

  Further, the winding unit 10 of the present embodiment includes a clearer 15 for detecting a yarn defect on the upstream side of the yarn pool unit 71. When the clearer 15 detects a yarn defect, the yarn length control unit 90 calculates the yarn defect length from the count value obtained by counting the positive rotation pulse signals of the servo motor 55 while the clearer 15 detects the yarn defect. To do.

  Thereby, the length of the yarn defect part detected by the clearer 15 can be accurately calculated by counting the forward rotation pulse signal. Therefore, the yarn length necessary for removing the yarn defect can be accurately calculated.

  Further, the automatic winder of this embodiment includes a plurality of the winding units 10.

  The automatic winder having this configuration can suppress the variation in the yarn length of the package 30 formed by each of the winding units 10 and can form the package 30 that is accurately managed at a constant length.

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

  The servo motor 55 of the above embodiment is configured to be controlled by the unit controller 50, but is not limited to this configuration. For example, as shown in FIG. 3, the winding unit 10 may include a servo motor control unit 150 for controlling the servo motor 55, and the servo motor control unit 150 may include the yarn length control unit 90. .

  In the above embodiment, the supply count value is added based on the forward rotation pulse signal of the servo motor 55, the return count value is added based on the reverse rotation pulse signal, and finally the return count value is subtracted from the supply count value. It is configured. However, the supply count value can be changed to be subtracted when the reverse rotation pulse signal is input from the servo motor 55.

  In the above-described embodiment, the cumulative supply yarn length value is calculated based on the supply count value and the return count value that are added based on the signal from the servo motor 55, and is compared with the set winding length. It is configured. However, instead of this, a value corresponding to the set winding length is set as an appropriate variable at the start of winding to an empty winding bobbin, and the variable is set based on the forward rotation pulse signal from the servomotor 55. Can be configured to count down. In this case, the comparison unit compares the value of the variable with zero. When the yarn is returned from the yarn pool section 71 to the upstream side by the yarn joining operation or the like, the variable is counted up on the basis of the reverse pulse signal from the servo motor 55, thereby returning the yarn to the upstream side. The length can be taken into account.

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. The front view which showed the schematic structure of the winding unit of a modification.

Explanation of symbols

10 Winding unit (yarn winding device)
14 Splicer device (yarn splicing device)
15 Clearer (Thread defect detector)
20 Yarn 21 Yarn feeding bobbin 30 Package 50 Unit control unit 55 Servo motor (yarn storage drive unit)
60 Yarn supply bobbin holding part (yarn supply bobbin set part)
61 Accumulator 71 Thread pool section 90 Thread length control section (count section)

Claims (5)

In a yarn winding device that winds a predetermined length of yarn around a package,
A yarn pool section for storing yarn before being wound around the package;
A yarn storage drive unit that is driven to supply the yarn to the yarn pool unit;
A counting unit that counts the driving amount of the yarn storage driving unit;
With
The yarn winding device, wherein the length of the yarn wound around the package is calculated from the count value of the driving amount. The yarn winding device according to claim 1,
A yarn joining device disposed upstream of the yarn pool portion for performing the yarn joining operation;
The counting unit counts a driving amount of the yarn storage driving unit when the yarn is pulled out from the yarn pool unit to the upstream side during the yarn joining operation,
Before the yarn joining operation is performed, a supply count value obtained by counting the drive amount of the yarn storage driving unit that is driven to supply yarn to the yarn pool unit, and the yarn joining operation for the yarn joining operation. The yarn winding device is characterized in that the yarn length wound around the package is calculated in consideration of the return count value obtained by counting the driving amount when the yarn is drawn upstream from the pool portion. The yarn winding device according to claim 2,
A yarn feeding bobbin set portion that can be set by exchanging a yarn feeding bobbin for supplying yarn wound around the package;
At the time of replacing the yarn feeding bobbin, the driving amount of the yarn storage driving unit when pulling out a yarn of a necessary length from the yarn pool unit for the yarn joining operation to the upstream side is counted as the return count value,
The yarn winding device, wherein the yarn length wound around the package is calculated in consideration of the return count value and the supply count value. A yarn winding device according to any one of claims 1 to 3,
A yarn defect detector for detecting a yarn defect upstream of the yarn pool section;
When the yarn defect detector detects a yarn defect, a yarn defect length is calculated from a count value obtained by counting the drive amount of the yarn storage drive unit while the yarn defect detector detects a yarn defect. A yarn winding device characterized by that.   An automatic winder comprising a plurality of the yarn winding devices according to any one of claims 1 to 4.

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