JP2010047407A - 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 improving the detection accuracy of a yarn failure by accurately calculating a yarn feed amount passing through a yarn failure detector. <P>SOLUTION: A winding unit 10 is provided with a yarn pool section 71 for storing a yarn 20 before being wound onto a package 30, and a servomotor 55 driven for feeding the yarn 20 to the yarn pool section 71. Moreover, the winding unit 10 is provided with a clearer 15 arranged on the upstream side of the yarn pool section 71 for detecting the yarn failure, and it is configured to calculate the length of thickness unevenness that passed through the clearer 15 based on the yarn feed amount on the upstream side of the yarn pool section 71. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a yarn winding device and an automatic winder, and more particularly to detection of a defective portion of 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 (automatic winder). 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, in order to calculate the length of the yarn wound around the package and the length of the yarn defect portion, the yarn feed amount (yarn feed length, yarn speed) taken up from the package is calculated. Conventionally, a yarn winding device configured to measure has been proposed. For example, Patent Literature 1 and Patent Literature 2 disclose this type of yarn winding device.
JP 2002-348043 A JP 2005-194024 A

  Patent Document 1 discloses a configuration in which a yarn winding machine that winds a yarn around a traverse bobbin includes a clearer having a running time correlator. The yarn winding machine of Patent Document 1 has a configuration in which a yarn sensor is provided at each of two measurement points. The measured values of the two yarn sensors are evaluated via the travel time correlator and the yarn speed is examined. The traverse bobbin is configured to rotate by the frictional action of the drive roller, and a pole wheel is disposed on the drive roller. Pulses generated as individual poles of the pole wheel pass through the angle sensor are fed to the travel time correlator for range submission for correct locking of the adjustment circuit.

  Patent Document 2 discloses the following configuration in an automatic winder that winds a spun yarn while measuring the speed of the running spun yarn. That is, the automatic winder disclosed in Patent Document 2 is configured to follow and rotate the package using the rotation of the traverse drum as a drive source. This automatic winder includes a light receiving element that is arranged at equal intervals in the yarn running direction, converts incident light into an electrical signal, and a projection light source that projects light onto the light receiving element by applying light to the spun yarn. Prepare. And the winding device uses the change in photocurrent accompanying the amount of fluff generated in the light receiving element when the spun yarn having countless fuzz projected on the light receiving element travels, Obtain the feed length of the running spun yarn. Specifically, the signal obtained by the light receiving element is passed through a bandpass filter, shaped into a waveform, converted into a pulse train, and then the number of pulses is counted using a counter. Based on this count value, the yarn length of the spun yarn can be obtained.

  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 to be wound, and the configuration is complicated and It was a cause of high cost.

  Further, Patent Document 1 detects the rotational motion of a winding drum (driving roller) that rotates a package (twisted bobbin) by an angle sensor, and increases the measurement accuracy by considering a signal proportional to the rotational motion. It is said. 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, even if the rotational speed of the winding drum is taken into account when measuring the yarn speed, there is a limit to the improvement in measurement accuracy, and there remains room for improvement in this respect.

  Further, in the configuration disclosed in Patent Document 2, it is also conceivable to use the traverse drum pulse signal to determine the frequency band to be removed when the noise of the detection signal of the light receiving element is removed by the band pass filter. . However, due to the difference between the rotational speed of the winding drum (traverse drum) and the actual yarn speed as described above, noise removal is not performed properly, and there is a possibility that accurate yarn feed length cannot be measured. .

  The present invention has been made in view of the above circumstances, and an object of the present invention is to accurately calculate the yarn feed amount passing through the yarn defect detector and improve the yarn defect detection accuracy, and It is to provide an automatic winder.

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, the following configuration is provided in a yarn winding device that winds a yarn around a package. That is, the yarn winding device includes a yarn pool unit, a yarn storage drive unit, and a yarn defect detector. 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 yarn defect detector is arranged on the upstream side of the yarn pool portion in order to detect a yarn defect. Then, the yarn winding device calculates the length of the thickness unevenness that has passed through the yarn defect detector based on the yarn feed amount upstream of the yarn pool section.

  Thereby, it is possible to prevent the yarn pool portion from transmitting the variation in the yarn speed accompanying the winding operation of the package to the upstream side. Further, by controlling the driving of the yarn storage driving unit, the yarn feed amount passing through the yarn defect detector can be accurately controlled. Accordingly, since the yarn feed amount passing through the yarn defect detector is stabilized, the detection accuracy of the yarn defect detector can be improved. Accordingly, it is possible to prevent the thickness unevenness of the length to be determined as the yarn defect from being wound around the package, and to prevent the allowable length unevenness from being removed as the yarn defect. .

  In the yarn winding device, the length of the thickness unevenness that has passed through the yarn defect detector can be calculated using the yarn feed amount supplied to the yarn pool portion by driving the yarn storage driving portion. preferable.

  Thereby, since the yarn feed amount can be easily calculated based on the driving speed of the yarn accumulating drive unit, the configuration can be simplified.

  According to the second aspect of the present invention, the following configuration is provided in a yarn winding device that winds a yarn around a package. That is, the yarn winding device includes a yarn pool unit, a yarn storage drive unit, a yarn defect detector, and a yarn feed amount detector. 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 yarn defect detector is arranged on the upstream side of the yarn pool portion in order to detect a yarn defect. The yarn feed amount detector is disposed upstream of the yarn pool portion. The yarn feed amount detector measures the speed of the yarn supplied to the yarn pool unit or the feed length of the yarn by driving the yarn storage drive unit.

  Thereby, it is possible to prevent the yarn pool portion from transmitting the variation in the yarn speed accompanying the winding operation of the package to the upstream side. Further, by controlling the driving of the yarn storage driving unit, the yarn feed amount passing through the yarn defect detector can be accurately controlled. Therefore, the yarn feed amount detector can accurately measure the yarn speed on the upstream side of the yarn pool section or the feed length of the yarn that is not affected by the fluctuation of the yarn speed accompanying the winding operation. Further, the detection accuracy of the yarn defect detector can be improved with reference to an accurate yarn feed amount that is not affected by the winding operation. Accordingly, it is possible to prevent the thickness unevenness of the length to be determined as the yarn defect from being wound around the package, and to prevent the allowable length unevenness from being removed as the yarn defect. .

  It is preferable that the yarn winding device calculates the length of the thickness unevenness that has passed through the yarn defect detector based on the yarn speed or the yarn feed length detected by the yarn feed amount detector.

  Thus, the yarn defect portion can be accurately identified based on the accurate yarn speed or yarn feed length.

  In the yarn winding device, the yarn feed amount detector can be configured to measure the yarn feed length by a spatial filter method.

  Thereby, the yarn feed length can be measured with high accuracy without performing complicated calculations.

  In the yarn winding device, the yarn feed amount detector can be configured to measure the yarn speed by a two-point measuring method.

  Thereby, the yarn speed can be measured with high accuracy by comparing the detection values acquired from the two measurement points.

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

  As a result, it is possible to provide an automatic winder that can accurately detect a yarn defect and can efficiently form a high-quality package.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of a winding unit 10 according to the first embodiment.

  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 26, and an upstream yarn guide pipe 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 disposed.

  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 a sensor head 19 in which an unillustrated yarn unevenness sensor is disposed, and an analyzer (yarn defect determination unit) 52 that processes a signal from the yarn unevenness sensor. The analyzer 52 processes the signal from the yarn unevenness sensor to determine the presence or absence of yarn defects such as slabs to be removed. 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 section of the storage guide arm 75, the rotation of the storage guide arm 75 can be controlled precisely. As a result, the speed, length, timing, and the like when supplying the yarn 20 to the yarn pool section 71 can be accurately controlled, and various operations can be performed more smoothly. Accordingly, the feed length and yarn speed of the yarn passing through the clearer 15 can be accurately controlled.

  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.

  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 via a servo motor controller 56.

  With this configuration, when the servo motor 55 drives the storage guide arm 75 in the forward direction, the storage guide arm 75 rotates as described above, and the yarn 20 is stored in the yarn pool portion 71. Therefore, if the rotation angle of the servo motor 55 (the rotation angle of the storage guide arm 75) is known, the yarn length wound around the yarn pool portion 71 can be calculated using the diameter of the yarn winding portion of the yarn pool portion 71. it can. In the present embodiment, by utilizing this fact, the yarn feed amount supplied to the yarn pool section 71 can be accurately calculated based on the pulse signal output when the servo motor 55 rotates. More specifically, as the yarn feed amount, the feed length of the yarn conveyed within a predetermined time, the yarn conveyance speed, and the like are calculated.

  During the operation of the winding unit 10, the disturbance control is performed by the winding unit 9, so that there is a difference between the actual yarn speed wound around the package 30 and the rotational speed of the winding drum 24. May occur. However, in this embodiment, the yarn speed upstream of the yarn pool section 71 is determined by the rotational speed of the servo motor 55. For example, even when disturb control is performed in the winding section 9, it is downstream of the yarn pool section 71. The fluctuation of the yarn speed generated on the side does not reach the upstream side.

  Further, the accumulator 61 has a configuration in which the yarn 20 is wound around the same portion of the yarn pool portion 71 by the storage guide arm 75 and stored in a spiral shape, so that the winding length of the yarn 20 per one rotation of the storage guide arm 75 is stored. The length (supply length) can always be constant. Further, since the yarn 20 is wound around the yarn pool portion 71 while forming a simple spiral, there is no risk of unwinding failure due to yarn overlap (ribbon winding), and it is not necessary to perform disturb control or the like during storage. Accordingly, the yarn speed upstream of the yarn pool portion 71 is exactly proportional to the rotational speed of the storage guide arm 75. As a result, by controlling the rotational speed of the storage guide arm 75 by the servo motor control unit 56, the yarn speed upstream of the yarn pool unit 71 can be controlled with high accuracy.

  Next, the yarn defect detection of the clearer 15 will be described. The sensor head 19 provided in the clearer 15 is provided with an unillustrated yarn unevenness sensor for detecting the yarn thickness. The yarn unevenness sensor is for detecting unevenness in the thickness of the yarn, and the presence or absence of a yarn defect is determined from the detection value of the yarn unevenness sensor. A signal detected by the yarn unevenness sensor is transmitted to the analyzer 52.

  The analyzer 52 includes a CPU (not shown) that functions as a control unit and a signal processing unit. When the detection value input from the yarn unevenness sensor satisfies a predetermined condition, the analyzer 52 determines that there is a yarn defect and transmits a yarn defect detection signal to the unit controller 50. For example, it is determined as a slab or the like when a portion that is 150% of the average thickness of the yarn continues for 3 mm or more.

  A procedure for detecting a yarn unevenness defect by the analyzer 52 will be described using the above-described slab detection as an example. When a signal (defect occurrence signal) in which the thickness of the yarn is 150% or more of the average thickness of the yarn is detected by the detection of the sensor head 19 provided in the clearer 15, the defect occurrence signal is sent to the analyzer 52. Receiving the defect occurrence signal, the analyzer 52 counts the pulse signal transmitted from the servo motor 55 to monitor the rotation angle of the storage guide arm 75 from when the defect occurrence signal is received. When the rotation angle of the storage guide arm 75 while receiving the defect occurrence signal becomes equal to or greater than a predetermined rotation angle corresponding to the yarn length of 3 mm, the analyzer 52 determines that slab has occurred. Then, the analyzer 52 transmits a yarn defect detection signal to the unit controller 50.

  Here, the fluctuation of the yarn speed that occurs when the yarn is actually taken up by the winding unit 9 is blocked by the yarn pool unit 71 as described above, and passes through the clearer 15 on the upstream side of the yarn pool unit 71. The yarn speed) can be accurately controlled by the servo motor controller 56. Therefore, for example, when there is no excess or deficiency in the amount of yarn stored in the yarn pool section 71, the servo motor 55 is controlled so that the yarn 20 runs at a constant speed suitable for yarn defect detection by the clearer 15. It is also possible. As a result, the presence or absence of a yarn defect by the clearer 15 can be accurately determined. Therefore, the quality of the package 30 can be ensured even if the margin is expected to be large and the determination condition of the yarn defect is not set more strictly than necessary, so that the removal of allowable yarn unevenness is suppressed and the production efficiency is improved. be able to.

  A pulse signal from a servo motor 55 is input to the analyzer 52 via a servo motor control unit 56. The analyzer 52 calculates the continuous length of the thickness unevenness of the yarn 20 based on the pulse signal of the servo motor 55. Thereby, for example, even if the rotational speed of the storage guide arm 75 changes in order to adjust the storage amount of the yarn in the yarn pool section 71, the detection accuracy of the yarn defect by the clearer 15 can be appropriately maintained.

  Next, the operation of each part when the clearer detects a yarn defect will be described. Based on the yarn defect detection signal of the clearer 15, the unit controller 50 stops the servo motor 55 of the accumulator 61 and stops the storage guide arm 75 from rotating. 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 controller 50 places the servo motor 55 in the neutral (free) state, and sucks and captures the downstream yarn located below the introduction hole 80 of the accumulator 61 by the downstream yarn guide pipe 26. Then, the downstream yarn guide pipe 26 is rotated to the guide position in a state where the yarn end of the downstream yarn is captured. Since the servo motor 55 is in the neutral state, when the downstream side yarn guide pipe 26 rotates downward, the storage guide arm 75 rotates in the direction of unwinding the yarn, and the yarn is drawn upstream of the accumulator 61. Thereby, even when the yarn defect portion is wound around the yarn pool portion 71, the yarn defect can be pulled back from the yarn pool portion 71 to the upstream side again. Then, 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.

  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 includes the yarn pool unit 71, the servo motor 55, and the clearer 15. 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 clearer 15 is disposed on the upstream side of the yarn pool portion 71 in order to detect a yarn defect. Then, the winding unit 10 calculates the length of the thickness unevenness that has passed through the clearer 15 based on the yarn feed amount (yarn speed) upstream from the yarn pool section 71.

  As a result, the yarn pool portion 71 can prevent the yarn speed variation associated with the winding operation of the package 30 from being transmitted to the upstream side. Further, by controlling the drive of the servomotor 55, the yarn feed amount passing through the clearer 15 can be accurately controlled. Therefore, since the yarn feed amount passing through the clearer 15 is stabilized, the detection accuracy of the clearer 15 can be improved. This prevents the uneven thickness of the length to be determined as the yarn defect from being wound around the package 30 and prevents the uneven thickness of the allowable length from being removed as the yarn defect. it can.

  Further, the winding unit 10 of the present embodiment calculates the length of the thickness unevenness that has passed through the clearer 15 using the yarn feed amount supplied to the yarn pool section 71 by driving the servo motor 55.

  Thereby, since the length of the yarn defect portion can be easily calculated based on the driving speed of the servo motor 55, the simplification of the configuration can be realized.

  In the present embodiment, the feed length or the yarn speed of the yarn traveling on the upstream side of the accumulator 61 can be directly calculated from the number of rotations of the servo motor 55. Therefore, in this embodiment, a yarn feed amount detector as shown in the second and third embodiments described later is not provided. Therefore, the configuration for detecting the yarn speed can be simplified, and the manufacturing cost can be reduced.

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

  The automatic winder having this configuration can accurately detect a yarn defect and can efficiently form a high-quality package.

  Next, a yarn winding device having a configuration including a yarn feed amount detector for detecting the yarn feed length or yarn speed at a predetermined position will be described. The second embodiment shown below measures the yarn feed length using the spatial filter method, and the third embodiment measures the yarn speed using the two-point measurement method.

  A second embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a front view showing a schematic configuration of the winding unit 10a of the second embodiment. FIG. 4 is a schematic diagram showing how the yarn feed length is detected in the winding unit 10a. Since the second embodiment is the same as the first embodiment except for the configuration of the yarn feed amount detector, the explanation will focus on the portion of the yarn feed amount detector, and the other portions will be explained here. Is omitted.

  As shown in FIG. 3, the winding unit body 16 of the winding unit 10 a according to this embodiment includes a yarn feed amount detector 101 for detecting the speed of the yarn 20. The yarn feed amount detector 101 includes a detection head 115 and a yarn feed amount calculation unit 111. The detection head 115 is disposed upstream of the clearer 15 and downstream of the splicer device 14. The detection head 115 is disposed in the vicinity of the clearer 15 and is configured to be able to measure the yarn feed amount immediately before passing through the clearer 15.

  As shown in FIG. 4, the detection head 115 includes a light source 121, a diffusion lens 122, a slit 123, and a light receiver 124 as main components. A gap is formed between the light source 121 and the diffusion lens 122 on the light emitting side, and the slit 123 and the light receiver 124 on the light receiving side. The yarn 20 unwound from the yarn feeding bobbin 21 travels toward the accumulator 61 so as to pass through this gap.

  The slit 123 is for preventing unnecessary scattered light and the like from entering the light receiver 124. The slits 123 are formed with a plurality of openings 131 arranged at a predetermined pitch.

,
The light receiver 124 is constituted by a plurality of light receiving elements 125 arranged at a predetermined pitch along the traveling path of the yarn 20. The light receiving element 125 has a light source conversion characteristic and is configured to be able to detect the shade of the running yarn 20.

  With this configuration, the light from the light source 121 is diffused by the diffusing lens 122 and applied to the traveling yarn 20. The uneven thickness of the traveling yarn is shaded and reflected on the light receiving element 125 through the slit 123, and the detection signal of the light receiving element 125 is transmitted to the yarn feed amount calculation unit 111.

  The yarn feed amount calculation unit 111 is configured as a microcomputer that includes a CPU and a storage unit, and receives a detection signal from the light receiving element 125. Further, the yarn feed amount calculation unit 111 is configured to receive a pulse signal from the servo motor 55 of the accumulator 61 via the servo motor control unit 56. Furthermore, the yarn feed amount calculation unit 111 includes a bandpass filter (not shown). This band pass filter is for removing noise from the detection signal obtained by the light receiving element 125.

  The bandpass filter sets a specific frequency band while referring to the pulse signal from the servo motor 55, and performs noise removal by attenuating the frequency band in the other range. In this way, noise removal is performed in consideration of the pulse signal of the servo motor 55 (that is, a signal indicating the speed at which the yarn 20 is supplied to the yarn pool section 71), so that the yarn is based on an appropriate frequency component of the waveform. Can be measured with high accuracy.

  The yarn feed amount calculation unit 111 performs noise removal by the band pass filter, and then performs waveform shaping to convert the pulse train. The number of pulses of the converted pulse train is counted by a counter (not shown) provided in the yarn feed amount calculation unit 111. The yarn feed amount calculation unit 111 calculates the yarn feed length based on the obtained number of pulses and the arrangement pitch of the openings 131. The calculated yarn feed length is input to the analyzer 52 of the clearer 15 and is used for determining a yarn defect. The yarn feed amount calculation unit 111 can easily detect the average yarn speed by measuring the feed length of the yarn.

  As described in the first embodiment, the traveling speed of the yarn 20 itself can be directly obtained from the rotational speed of the servo motor 55. However, for example, when winding a highly stretchable yarn, and the clearer 15 and the accumulator 61 are arranged at a considerable distance from each other, the yarn 20 is somewhat stretched between the clearer 15 and the accumulator 61. There is. In this case, a slight deviation occurs between the speed at which the yarn 20 is wound around the yarn pool portion 71 and the speed at which the yarn 20 passes through the clearer 15, which causes a decrease in yarn defect detection accuracy in the clearer 15.

  In this regard, by disposing the detection head 115 of the yarn feed amount detector 101 in the vicinity of the clearer 15 as in this embodiment, the yarn speed passing through the clearer 15 can be accurately determined while eliminating the influence of yarn expansion and contraction. Can be sought. Further, the yarn feed amount calculation unit 111 of the yarn feed amount detector 101 receives a pulse signal from the servo motor 55 as an auxiliary signal, and noise is removed based on this auxiliary signal. The accuracy of the measured value is also good. Therefore, by determining the yarn defect with the analyzer 52 using the yarn speed measured by the yarn feed amount detector 101, the yarn defect can be detected with high accuracy even with a highly stretchable yarn.

  As described above, the winding unit 10 a according to the second embodiment includes the yarn pool unit 71, the servo motor 55, the clearer 15, and the yarn feed amount detector 101. 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 clearer 15 is arranged on the upstream side of the yarn pool portion 71 in order to detect a yarn defect. The yarn feed amount detector 101 is disposed on the upstream side of the yarn pool portion 71. The yarn feed amount detector 101 measures the speed of the yarn supplied to the yarn pool section 71 or the feed length of the yarn by driving the servo motor 55.

  As a result, the yarn pool portion 71 can prevent the yarn speed variation associated with the winding operation of the package 30 from being transmitted to the upstream side. Further, by controlling the drive of the servomotor 55, the yarn feed amount passing through the clearer 15 can be accurately controlled. Therefore, the yarn feed amount detector 101 can accurately measure the yarn speed on the upstream side of the yarn pool section 71 or the feed length of the yarn that is not affected by the fluctuation of the yarn speed accompanying the winding operation. Further, the detection accuracy of the clearer 15 can be improved with reference to an accurate yarn feed amount (yarn speed) that is not affected by the winding operation. Accordingly, it is possible to prevent the thickness unevenness of the length to be determined as the yarn defect from being wound around the package, and to prevent the allowable length unevenness from being removed as the yarn defect. .

  The winding unit 10a of the second embodiment calculates the length of the thickness unevenness that has passed through the clearer 15 based on the yarn speed or the yarn feed length detected by the yarn feed amount detector 101.

  Thus, the yarn defect portion can be accurately identified based on the accurate yarn speed or yarn feed length.

  In the winding unit 10a of the second embodiment, the yarn feed amount detector 101 measures the yarn feed length by the spatial filter method.

  As a result, the yarn feed length (yarn length) can be measured with high accuracy without performing complicated calculations.

  Next, a third embodiment in which the yarn speed is measured using the two-point measurement method will be described with reference to FIG. FIG. 5 is a schematic diagram showing how the yarn speed is detected in the third embodiment. In the present embodiment, as in the second embodiment, the configuration other than the yarn feed amount detector is the same as that in the first embodiment. Therefore, here, the description will focus on the yarn feed amount detector. The description of other parts is omitted.

  The yarn feed amount detector 201 provided in the winding unit 10b of the present embodiment includes a detection head 215 and a yarn feed amount calculation unit 211. The detection head 215 is disposed upstream of the clearer 15 and downstream of the splicer device 14 as in the second embodiment. The detection head 215 is disposed in the vicinity of the clearer 15 and is configured to be able to measure the yarn speed immediately before passing through the clearer 15.

  As shown in FIG. 5, the detection head 215 includes a first yarn unevenness sensor 221 and a second yarn unevenness sensor 222. The first yarn unevenness sensor 221 and the second yarn unevenness sensor 222 are arranged side by side along the travel path of the yarn 20, and the first yarn unevenness sensor 221 is arranged downstream of the second yarn unevenness sensor 222.

  The first yarn unevenness sensor 221 and the second yarn unevenness sensor 222 are electrically connected to a yarn feed amount calculation unit 211, and the yarn feed amount calculation unit 211 is configured as a microcomputer having a CPU. The yarn feed amount calculation unit 211 is configured to receive a pulse signal of the servo motor 55 via the servo motor control unit 56.

  The CPU of the yarn feed amount calculation unit 211 samples an analog waveform measured by the first yarn unevenness sensor 221 and the second yarn unevenness sensor 222 based on a predetermined sampling frequency.

  Since the two yarn unevenness sensors 221 and 222 measure the same yarn, the same waveform is observed. However, since the first yarn unevenness sensor 221 is disposed on the downstream side of the second yarn unevenness sensor 222, the waveform detected by the first yarn unevenness sensor 221 is delayed with respect to the waveform detected by the second yarn unevenness sensor 222. . The yarn feed amount calculation unit 211 estimates the delay time based on the two waveforms by a known cross-correlation method. The yarn speed can be estimated based on the delay time and the arrangement interval of the yarn unevenness sensors 221 and 222.

  In the winding unit 10b of this embodiment, it is conceivable to wind a highly elastic yarn. However, the yarn speed at which the yarn is supplied to the yarn pool portion 71 in the accumulator 61, and the yarn feed amount detector 201 are set. There should be no significant deviation from the passing yarn speed. Using this, the yarn feed amount calculation unit 211 finally determines the measured value of the yarn speed passing through the yarn feed amount detector 201 while referring to the yarn speed obtained from the pulse signal of the servomotor 55. decide.

  As described above, in the winding unit 10b of the third embodiment, the yarn feed amount detector 201 measures the yarn speed by the two-point measurement method.

  Accordingly, the yarn speed can be measured with high accuracy while comparing the detection values of the first yarn unevenness sensor 221 and the second yarn unevenness sensor 222 by the two-point measurement method. Further, a more accurate yarn speed can be detected by referring to the pulse signal from the servomotor 55 when finally determining the measured value of the yarn speed.

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

  In the second embodiment and the third embodiment, the detection head of the yarn feed amount detector is disposed on the upstream side of the clearer 15, but the present invention is not limited to this configuration. For example, the detection head can be changed to be arranged on the downstream side of the clearer 15. However, in order to accurately measure the speed of the yarn passing through the clearer 15, it is preferable to arrange the detection head in the vicinity of the clearer 15.

  Further, the yarn feed amount calculation unit 111 of the second embodiment and the yarn feed amount calculation unit 211 of the third embodiment may be configured to be provided on the unit control unit 50 side.

  In the second embodiment and the third embodiment, the yarn feed amount detector is arranged separately from the clearer 15, but instead of this configuration, the clearer 15 can be changed so as to also serve as the yarn feed amount detector. . In short, if at least one of the yarn defect detector and the yarn feed amount detector uses the pulse signal of the servo motor 55 as an auxiliary signal, the accuracy of the detection result can be improved.

  In the first to third embodiments, the servo motor 55 is controlled by the servo motor control unit 56, but is not limited to this configuration. For example, the servo motor 55 may be directly controlled by the unit controller 50. Further, the pulse signal of the servo motor 55 can be changed so as to be directly input to the clearer 15 or the yarn feed amount detectors 101 and 201 without going through the servo motor control unit 56.

The front view which showed the schematic structure of the winding unit of 1st Embodiment. The schematic cross section which showed the mode of the accumulator of a winding unit. The front view which showed the schematic structure of the winding unit of 2nd Embodiment. The schematic diagram which showed the mode of the thread feed length detection in 2nd Embodiment. The schematic diagram which showed the mode of the yarn speed detection in the winding unit of 3rd Embodiment.

Explanation of symbols

10 Winding unit (yarn winding 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)
61 Accumulator 71 Thread pool

Claims (7)

In a yarn winding device that winds a 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 yarn defect detector disposed upstream of the yarn pool portion to detect yarn defects;
With
A yarn winding device, wherein the length of thickness unevenness that has passed through the yarn defect detector is calculated based on a yarn feed amount upstream of the yarn pool section. The yarn winding device according to claim 1,
A yarn winding device, wherein the length of thickness unevenness that has passed through the yarn defect detector is calculated using a yarn feed amount supplied to the yarn pool portion by driving of the yarn storage drive portion. In a yarn winding device that winds a 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 yarn defect detector disposed upstream of the yarn pool portion to detect yarn defects;
A yarn feed amount detector disposed upstream of the yarn pool section;
With
The yarn winding device is characterized in that the yarn feed amount detector measures the speed of the yarn supplied to the yarn pool section or the feed length of the yarn by driving the yarn storage drive section. The yarn winding device according to claim 3,
A yarn winding device, wherein the length of thickness unevenness that has passed through the yarn defect detector is calculated based on the yarn speed or the yarn feed length detected by the yarn feed amount detector. The yarn winding device according to claim 3 or 4,
The yarn winding device is characterized in that the yarn feed amount detector measures the feed length of the yarn by a spatial filter method. The yarn winding device according to claim 3 or 4,
The yarn winding device is characterized in that the yarn feed amount detector measures a yarn speed by a two-point measuring method.   An automatic winder comprising a plurality of the yarn winding devices according to any one of claims 1 to 6.

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