JP2005225610A - Takeup system for resilient yarn, winder for resilient yarn, and yarn winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winder for a resilient yarn capable of suppressing low the residual shrinkage ratio when a roll is formed and establishing a good package shape. <P>SOLUTION: The winder for the resilient yarn is equipped with a contacting roller 18 installed downstream in the yarn advancing direction with respect to a godet roller couple and contacting with the peripheral surface of a roll 3 to be prepared while the resilient yarn Y is being taken up. A traversing device 4 is installed upstream of the contacting roller 18 about the yarn advancing direction. The resilient yarn Y put in the traverse motion by the traversing device 4 is taken up on the roll 3 being prepared through the contacting roller 18. A feed roller 27 is installed upstream of the traversing device 4 about the yarn advancing direction (between the godet roller and the traversing device 4), and the rotating speeds of the feed roller 27 and the contacting roller 18 are controlled so that the peripheral linear speed V2 of the feed roller 27 becomes higher than that V1 of the contacting roller 18. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an elastic yarn winding system and an elastic yarn winding machine for winding an elastic yarn such as polyurethane spun from a spinning machine around a bobbin and providing it as a so-called package. Or it is related with the winding method of such an elastic yarn.

  In general, an elastic yarn such as polyurethane has very large elasticity and very low rigidity. When winding such an elastic yarn, if the yarn is wound in a high tension state, the yarn is wound in a stretched state, resulting in a yarn having a high residual shrinkage rate. As a result, the quality of the rolled ball will be deteriorated, such as a poor unraveling property.

  FIG. 7A shows a configuration corresponding to FIG. In the method shown in FIG. 7A, the elastic yarn Y supplied by winding the godet roller GR2 is traversed by the traverse guide 5 of the traverse device 4 with the godet roller GR2 as a traverse fulcrum, and comes into contact with the winding ball 3. However, it is transferred to the peripheral surface of the drive roller 60 that is driven to rotate, and is wound around the winding ball 3. The driving roller 60 is rotationally driven at a constant speed while being in contact with the outer peripheral surface of the wound ball 3, and as a result, the circumferential speed (winding speed) of the wound ball 3 is kept constant.

  In Patent Document 1, in the configuration of FIG. 7A, in order to reduce the residual shrinkage by reducing the tension of the yarn (the tension at the point p1) when being wound around the bobbin B (roll ball 3), It is described that it is effective to increase the rotational speed (circumferential speed) of the godet roller GR2 compared to the winding speed. However, on the other hand, in Patent Document 1, especially when the winding speed of the winding ball 3 is high, if the speed of the godet roller GR2 is increased, the wrapping around the godet roller GR2 occurs due to the resistance of the traverse device 4 in the middle. It points out the problem.

  7A, when the winding speed increases, the air resistance (so-called windage loss) between the driving roller 60 and the godet roller GR2 increases. For this reason, at the time when the winding ball 3 is wound. The tension when pulling away from the godet roller GR2 (tension at the point p2) is considerably smaller than the tension (tension at the point p1). Accordingly, if it is attempted to reduce the tension at the time of winding around the winding ball 3 (point p1), the tension at the time of separation from the godet roller GR2 (point p2) becomes considerably small, and the wrapping around the godet roller GR2 is prevented. It will be easy to happen.

  Further, in the configuration as shown in FIG. 7A, if the winding speed is increased while the tension between the godet roller GR2 and the traverse device 4 is low, the godet roller GR2 that is the traverse fulcrum and the traverse device 4 The elastic yarn Y exhibits a large ballooning. This greatly increases the winding resistance and causes a significant reduction in productivity. Therefore, in the configuration as shown in FIG. 7A, the speed of the godet roller GR2 cannot be increased to keep the residual shrinkage rate low.

In order to solve the above-described problem, the method disclosed in Patent Document 1 is based on a feed roller 27 installed on the downstream side of the traverse device 4 as shown in FIG. This is a method of overfeeding the bobbin B (roll ball 3) at a speed of 1 or more times. According to this method, the yarn tension (the tension at the point p2) when the elastic yarn Y is pulled away from the godet roller GR2 on the upstream side of the traverse device 4 is kept high, and the elastic yarn Y is wound around the godet roller GR2. It is possible to suppress the occurrence of ballooning and smoothly wind up. Since the tension of the elastic yarn Y separated from the feed roller 27 is instantly relaxed, the tension at the point p1 when the elastic yarn Y is wound around the winding ball 3 can be kept small. As a result, the residual shrinkage rate during winding can be reduced. 7A and 7B, only the godet roller GR2 on the downstream side in the yarn traveling direction is shown in the godet roller pair that picks up and feeds the elastic yarn spun from the spinning machine.
JP-A-6-298453

  The winding method proposed in Patent Document 1 (FIG. 7B) is excellent in that the elastic yarn Y can be smoothly wound while suppressing the residual shrinkage as described above. However, the winding method of Patent Document 1 requires that the feed roller 27 and the bobbin B (roll ball 3) be installed apart from each other, and the circumferential surface of the feed roller 27 and the circumferential surface of the roll ball 3 are separated. The free length of the elastic yarn downstream from the traverse device 4 is increased by the distance X between them. Specifically, in the configuration of FIG. 7A, the free length downstream of the traverse device is L, whereas in the configuration of FIG. 7B, L + X. Accordingly, the amount of yarn stayed when the traverse device 4 is wound while being turned at the end in the axial direction is increased, and it becomes easy to form a package having a high-pitched shape.

  In order to avoid such an ear height as much as possible, in the configuration of FIG. 7B, the circumferential surfaces of the feed roller 27 and the ball 3 are made as close as possible, and the distance X is made as small as possible. . However, in this case, since the free length increase amount X fluctuates greatly even if the distance between the feed roller 27 and the ball 3 is slightly changed, it is difficult to set the distance X accurately, and the downstream of the traverse device is difficult to set. It was difficult to stabilize the free length (L + X). As a result, the turn position when the elastic yarn Y is wound around the winding ball 3 is not stable, which causes the package to fall and the end face disturbance to increase.

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, there is provided an elastic yarn winding system configured as follows. A pair of godet rollers that picks up and feeds the elastic yarn spun from the spinning machine, and a contact roller that contacts the outer peripheral surface of the wound ball during winding of the elastic yarn, and a traverse device is provided upstream of the contact roller in the yarn traveling direction. An elastic yarn traversed by the traverse device is wound around the wound ball via the contact roller. A feed roller is provided between the godet roller pair and the traverse device, and the rotational speeds of the feed roller and the contact roller are controlled so that the peripheral speed of the feed roller is higher than the peripheral speed of the contact roller. . The yarn is traversed by the traverse device with the circumferential surface of the feed roller as the traverse fulcrum.

  As a result, the elastic yarn that had been in high tension before passing through the feed roller relaxed after passing through the feed roller, so that the elastic yarn can be wound from the contact roller to the winding ball with low tension. Residual shrinkage can be suppressed. In addition, since the free length of the elastic yarn on the downstream side of the traverse device can be shortened, the yarn stays at the axial end when the elastic yarn is wound around the wound ball can be minimized. Therefore, it is possible to avoid a state in which both ends in the axial direction of the package are thick (ear height state), and it is possible to improve the final package shape.

  ◆ According to the second aspect of the present invention, there is provided an elastic yarn winder configured as follows. An elastic yarn winding machine provided on the downstream side in the yarn traveling direction with respect to a godet roller pair that picks up and feeds an elastic yarn spun from a spinning machine, and is in contact with the outer peripheral surface of the winding ball during winding of the elastic yarn A contact roller is provided, and a traverse device is provided upstream of the contact roller in the yarn traveling direction, and the elastic yarn traversed by the traverse device is wound around the winding ball via the contact roller. A feed roller is provided on the upstream side in the yarn traveling direction of the traverse device, and the rotational speeds of the feed roller and the contact roller are controlled so that the peripheral speed of the feed roller is higher than the peripheral speed of the contact roller. . The yarn is traversed by the traverse device with the circumferential surface of the feed roller as the traverse fulcrum.

  As a result, the elastic yarn that had been in high tension before passing through the feed roller relaxed after passing through the feed roller, so that the elastic yarn can be wound from the contact roller to the winding ball with low tension. Residual shrinkage can be suppressed. In addition, since the free length of the elastic yarn on the downstream side of the traverse device can be shortened, the yarn stays at the axial end when the elastic yarn is wound around the wound ball can be minimized. Therefore, it is possible to avoid a state in which both ends in the axial direction of the package are thick (ear height state), and it is possible to improve the final package shape.

  ◆ According to the third aspect of the present invention, there is provided an elastic yarn winder configured as follows. A contact roller that contacts the outer peripheral surface of the wound ball during winding of the elastic yarn is provided, and a traverse device is provided on the upstream side of the contact roller in the yarn traveling direction, and the elastic yarn traversed by the traverse device is the contact roller. It is made to wind up by the said ball. A feed roller is provided on the upstream side in the yarn traveling direction of the traverse device. The feed roller is disposed away from the traverse device so that the free length of the yarn between the feed roller and the traverse device is not less than 3 times and not more than 5 times the traverse width in the traverse device. . The rotation speeds of the feed roller and the contact roller are controlled so that the peripheral speed of the feed roller is higher than the peripheral speed of the contact roller. The yarn is traversed by the traverse device with the circumferential surface of the feed roller as the traverse fulcrum.

  As a result, the elastic yarn that had been in high tension before passing through the feed roller relaxed after passing through the feed roller, so that the elastic yarn can be wound from the contact roller to the winding ball with low tension. Residual shrinkage can be suppressed. In addition, since the free length of the elastic yarn on the downstream side of the traverse device can be shortened, the yarn stays at the axial end when the elastic yarn is wound around the wound ball can be minimized. Therefore, it is possible to avoid a state in which both ends in the axial direction of the package are thick (ear height state), and it is possible to improve the final package shape. Furthermore, it is possible to suppress the occurrence of air resistance and ballooning between the feed roller and the traverse device, and to make the winding smooth.

  The elastic yarn winder further includes a support member that is movable in a direction approaching and separating from the winding ball, and the position of the contact roller relative to the support member can be changed on the support member. It is preferable that the traverse device is supported by being fixed with respect to the support member.

  Accordingly, a driving means for positively moving the support member is provided, and the support member can be actively retracted as the winding ball is thickened. Therefore, the resistance generated when the support member is displaced ( For example, the influence of the sliding resistance) on the contact pressure of the contact roller can be reduced. Therefore, even if the contact pressure of the contact roller with respect to the wound ball is set to be small, the resistance generated when the support member is displaced does not cause a large variation in the contact pressure. Therefore, a winder suitable not only for high contact pressure but also for applications that require low contact pressure can be provided.

  ◆ According to the fourth aspect of the present invention, the following elastic yarn winding method is provided. The elastic yarn spun from the spinning machine is taken out and sent out by a pair of godet rollers, the elastic yarn from the pair of godet rollers is traversed by a traverse device, and the elastic yarn traversed by the traverse device is passed through a contact roller. And wind it up on a ball. A feed roller is provided between the godet roller pair and the traverse device, and the peripheral speed of the feed roller is set to be higher than the peripheral speed of the contact roller, and the elastic yarn from the godet roller pair is overfeeded by the feed roller. The state is sent to the contact roller.

  As a result, the elastic yarn that had been in high tension before passing through the feed roller relaxed after passing through the feed roller, so that the elastic yarn can be wound from the contact roller to the winding ball with low tension. Residual shrinkage can be suppressed. In addition, since the free length of the elastic yarn on the downstream side of the traverse device can be shortened, the yarn stays at the axial end when the elastic yarn is wound around the wound ball can be minimized. Therefore, it is possible to avoid a state in which both ends in the axial direction of the package are thick (ear height state), and it is possible to improve the final package shape.

  The above-described elastic yarn winding method is suitable for high-speed winding in which the elastic yarn winding speed is 900 meters per minute or more.

  That is, in the high-speed winding as described above, the residual shrinkage of the residual yarn can be particularly suppressed and the package shape can be improved.

  Next, embodiments of the invention will be described. FIG. 1 is a schematic front view of an elastic yarn winding system according to an embodiment of the present invention. FIG. 2 is an overall front view of the elastic yarn winding machine according to the embodiment of the present invention. FIG. 3A is an enlarged front view of the main part showing the configuration of the slide box, and FIG. 3B is a view taken along line xx in FIG. FIG. 4 is a control system diagram of the elastic yarn winding machine. FIG. 5 is a view showing a state in which the arm tilts in accordance with the winding thickness of the wound ball.

  FIG. 1 shows an overall view of an elastic yarn winding system. The elastic yarn winding system includes a spinning machine S, a pair of godet rollers GR that takes out and feeds the elastic yarn Y spun from the spinning machine S, and an elastic yarn winding machine M. The godet roller pair GR is provided on the upstream side godet roller GR1 for taking the elastic yarn Y from the spinning machine S and determining the quality of the elastic yarn Y, and on the downstream side in the yarn traveling direction of the godet roller GR1, and the yarn traveling direction. And a downstream side godet roller GR2 for changing.

  FIG. 2 shows the entire configuration of the elastic yarn winding machine M, which is for winding the elastic yarn Y fed from the godet roller pair GR (downstream godet roller GR2). . The body frame 7 provided in the elastic yarn winding machine M is provided with a slide box 1 as a support member so as to be movable up and down. The machine body frame 7 is provided with a rotatable turret plate 2, and the turret plate 2 is configured to be rotatable around a rotation shaft 6 by a rotation driving device (not shown). A fixed frame 8 is provided on the front surface of the body frame 7, and an operation panel 9 is provided on the fixed frame 8.

  Two bobbin holders 11 and 12 project from the turret plate 2 and are rotatable. The two bobbin holders 11 and 12 are arranged at positions where the phases are different from each other by 180 ° with respect to the rotating shaft 6, one bobbin holder 11 is located at the upper winding position, and the other bobbin holder 12 is located at the lower standby position. ing. The positions of the two bobbin holders 11 and 12 can be exchanged by the rotation of the turret plate 2 by the rotation driving device. Bobbins B are attached to the bobbin holders 11 and 12.

  As shown in FIG. 2, a feed roller 27 is supported on the slide box 1 with its relative position to the slide box 1 fixed. The feed roller 27 is rotated by the driving force of the drive motor so as to send elastic yarn (hereinafter simply referred to as “yarn”) Y continuously supplied from the upper godet roller 61 to the lower traverse device 4. It is composed.

  A traverse device 4 is supported on the slide box 1 with its relative position to the slide box 1 fixed. As shown in FIG. 2 and FIG. 3A, a traverse guide 5 is provided in the traverse device 4, and this traverse guide 5 is engaged with the yarn Y as shown in FIG. By reciprocating as indicated by the white arrow in the traverse range of w, the yarn Y is traversed with the peripheral surface of the feed roller 27 as the traverse fulcrum.

  On the other hand, the slide box 1 supports the contact roller 18 so that the relative position to the slide box 1 can be changed. Specifically, the arm 13 is disposed substantially horizontally, and a midway portion thereof is pivotally supported by the slide box 1 so that the arm 13 can swing, and the contact roller 18 can be rotated on one end side of the arm 13. I support it. As the arm 13 swings up and down, the contact roller 18 moves in the direction close to the bobbin B at the winding position (downward) and the direction away from the bobbin B (upward). The relative position with respect to can be changed.

  An air cylinder 14 as a contact pressure adjusting means is connected between the arm 13 that supports the contact roller 18 and the slide box 1. The air cylinder 14 is configured to support a part of the weight of the contact roller 18, whereby the contact roller 18 has a small contact pressure corresponding to the remaining weight obtained by subtracting the support from its own weight. To contact the outer peripheral surface of the ball 3. As described above, if the weight of the contact roller 18 is used as it is as the contact pressure to the ball 3, the contact pressure is too large. The adjustment is done. However, when it is desired to set the contact pressure to a certain extent, the air cylinder 14 may be removed, or the air cylinder 14 may be configured to press the contact roller 18 against the bobbin B side. In this way, the contact roller 18 that has contacted the outer circumferential surface of the wound ball 3 rotates following the rotation of the wound ball 3.

  The contact roller 18 is located immediately downstream of the traverse guide 5 of the traverse device 4 (downstream of the yarn path). Then, the yarn Y traversed by the traveling traverse guide 5 is inherited to the peripheral surface of the contact roller 18, and the yarn is applied to the outer periphery of the winding ball 3 rotating further downstream by the driven rotation of the contact roller 18. Hand over.

  In order to detect the swing position of the arm 13, a roll thickness detection sensor 15 as a roll thickness detection means is fixed to the slide box 1. The winding thickness detection sensor 15 can detect the winding thickness of the winding ball 3 by detecting the displacement of the contact roller 18 in contact with the outer periphery of the winding ball 3 whose diameter is being increased by winding the yarn Y. I am doing so. As shown in FIG. 4, the roll thickness detection sensor 15 is electrically connected to a controller 30 described later.

  Further, as shown in FIG. 3A, a rotation sensor 16 for detecting the rotation speed of the contact roller 18 is fixed to the arm 13 and rotates in contact with the outer periphery of the ball 3. By examining the rotational speed of 18, the outer peripheral speed of the wound ball 3 can be detected. The rotation sensor 16 as the rotation speed detecting means is also electrically connected to the controller 30 shown in FIG.

  As shown in FIG. 3A, the slide box 1 is guided by rails (supporting member guide means) 17 and 17 arranged in the vertical direction, and is movable up and down along the rails 17 and 17. Yes. The slide box 1 moves closer to the winding ball 3 by moving downward, and moves away from the winding ball 3 by moving upward. Although most of the weight of the slide box 1 is supported by an air cylinder (not shown), the vertical movement of the slide box 1 is driven by a ball screw mechanism described later. In the present embodiment, the weight of the slide box 1 itself is completely supported by the air cylinder and the ball screw mechanism, and the weight does not act as a contact pressure with respect to the wound ball 3 except for the contact roller 18. However, the air cylinder may be omitted, and the weight of the slide box 1 may be supported only by the ball screw mechanism (driving means).

  The ball screw mechanism will be described. As shown in FIG. 3A, screw rods 19 are arranged in the vertical direction at the side position of the slide box 1 and are rotatably supported on the machine body frame 7 side. The lower end of the screw rod 19 is connected to the output shaft of the lifting drive motor 20, and the screw rod 19 is driven to rotate by the lifting drive motor 20. A ball nut 21 is fixed to the side of the slide box 1 and screwed into the screw rod 19, and the slide box 1 is moved up and down by the rotational drive of the screw rod 19 by the elevating drive motor 20. ing. The raising / lowering drive motor 20 is electrically connected to the controller 30 shown in FIG. 4 and its drive is controlled. The above-described screw rod 19, ball nut 21, and lift drive motor 20 constitute a ball screw mechanism.

  Here, a description will be given of the positional relationship between the downstream side godet roller GR2, the feed roller 27, the traverse device 4, and the contact roller 18. As shown in FIG. 3A, the feed roller 27 is located upstream of the traverse device 4 in the yarn traveling direction and downstream of the downstream godet roller GR2. That is, the feed roller 27 is located between the downstream godet roller GR 2 and the traverse device 4. The traverse device 4 is located upstream of the contact roller 18 in the yarn traveling direction. 3B, the distance q between the traverse guide (the point of engagement with the yarn in the traverse device 4) 5 and the point where the yarn on the circumferential surface of the feed roller 27 is separated is the traverse of the traverse device 4. It is about 4 times the width w.

  As shown in FIG. 4, a motor 29 is provided to drive the feed roller 27. The feed roller 27 is provided with a rotation sensor 31.

  A motor 22 is provided to drive the traverse cam of the traverse device 4. As the traverse device 4, a known rotary traverse device using rotating blades may be used, or another device may be used.

  Further, motors (bobbin driving means) 23 and 24 for respectively driving the two bobbin holders 11 and 12 are provided, and a rotation sensor 25 is provided for the bobbin holder 11 at the winding position.

  These motors (20, 29, 22, 23, 24) are all electrically connected to the controller 30, and their driving is controlled. The sensors (15, 16, 31, 25) are also electrically connected to the controller 30 so that information such as the rotation speed can be sent to the controller 30 as an electrical signal.

  The controller 30 illustrated in FIG. 4 is configured as a known microcomputer, and includes a CPU as a calculation device, and storage means such as a ROM, a RAM, and an external storage device. The controller 30 controls the bobbin holder drive motor 23, the lift drive motor 20, and the like based on signals detected by the winding thickness detection sensor 15, the rotation sensor 16, the bobbin holder rotation sensor 25, and the like.

  Next, the raising / lowering control of the slide box 1 in a winding process (at the time of formation of the winding ball 3) is demonstrated. This control is a control for raising the slide box 1 in accordance with the winding thickness of the winding ball 3 in the winding process.

  Specifically, the raising control of the slide box 1 according to the winding thickness is performed as follows. FIG. 3A shows a state where the winding of the yarn Y onto the bobbin B has already progressed to some extent, and the wound ball 3 is formed on the bobbin B. Then, it is assumed that the winding is further advanced from the state of FIG. 3A and the state shown in FIG. 5 is reached. The radius of the ball 3 is r in FIG. 3A, but increases by dr in the state of FIG. 5 to r + dr. Although the radius increment dr shown in FIG. 5 is exaggerated for convenience of explanation, it is actually a very small amount.

  As a result, the contact roller 18 that comes into contact with the outer periphery of the wound ball 3 rises relative to the slide box 1 by this winding thickness, and the arm 13 moves upward as shown by the small white arrow in FIG. Tilt.

  The roll thickness detection sensor 15 that detects this tilting (displacement of the contact roller 18) sends a signal to the controller 30, and the controller 30 drives the lifting drive motor 20 from the state shown in FIG. Control is performed so that the contact roller 18 is lowered relatively and the relative position of the contact roller 18 with respect to the slide box 1 is returned to the same relative position as that in the state of FIG.

  In this way, the relative position of the contact roller 18 with respect to the slide box 1 is detected by the roll thickness detection sensor 15, and when the relative rise of the contact roller 18 is detected, the slide box 1 is raised to move the contact roller 18. Control for returning the relative position to the slide box 1 is performed. With this control, the slide box 1 gradually rises in accordance with the winding thickness of the ball 3 in the winding process, and the distance L between the traverse guide 5 of the traverse device 4 and the peripheral surface of the contact roller 18. (Shown in FIGS. 3 (a) and 3 (b)) is kept constant.

  As described above, the contact pressure of the contact roller 18 against the wound ball 3 is determined by the weight of the contact roller 18 and the air cylinder 14 that supports it. Therefore, even if a guide resistance (for example, sliding resistance) is generated between the slide box 1 and the rail 17 when the slide box 1 is raised, the weight of the slide box 1 itself is used in this embodiment. Is not used as the contact pressure of the contact roller 18 with respect to the ball 3, the sliding resistance does not affect the contact pressure of the contact roller 18. Further, even if some rotational resistance is generated at the swing fulcrum of the arm 13 when the contact roller 18 is vertically displaced, this rotational resistance is compared with the resistance at the time of sliding of the slide box 1 described above. Is extremely small and does not significantly affect the contact pressure of the contact roller 18. Therefore, the winding unevenness of the package can be reduced, and a good winding package can be provided.

  In the present embodiment, the controller 30 shown in FIG. 4 detects the rotation speed of the contact roller 18 with the rotation sensor 16, and the motor 23 that drives the bobbin holder 11 so that the rotation speed detected by the rotation sensor 16 is constant. The drive control is performed. Specifically, if the detection value of the rotation sensor 16 falls below a predetermined value corresponding to the winding speed, the rotation speed of the motor 23 is increased. Conversely, if the detection value exceeds the predetermined value, the rotation speed of the motor 23 is increased. Control to decrease. As shown in FIG. 4, a bobbin holder rotation sensor 25 for detecting the rotation speed of the bobbin holder 11 is provided at an appropriate position. The detection value of the bobbin holder rotation sensor 25 is a feedback of the rotation speed of the motor 23. Used for control.

  At the same time as the above control, the controller 30 detects the rotational speed of the feed roller 27 with the rotation sensor 31, and calculates the peripheral speed V2 of the feed roller 27 from the obtained rotational speed. Further, the rotation speed of the contact roller 18 is detected by the rotation sensor 16, and the peripheral speed V1 of the contact roller 18 (FIG. 3A) is calculated from the obtained rotation speed. The rotational speed of the feed roller 27 and the rotational speed of the contact roller 18 (rotational speed of the bobbin holder 11) are controlled so that the peripheral speed V2 of the feed roller is higher than the peripheral speed V1 of the contact roller 18. In this embodiment, a predetermined coefficient k is set in advance (where k> 1, for example, k = 2, etc.), and the rotation speed of the feed roller drive motor 29 is controlled so that V2 = k × V1. . However, the configuration may be such that the bobbin holder drive motor 23 is controlled so that V1 becomes a predetermined peripheral speed, and the feed roller drive motor 29 is controlled so that V2 becomes a predetermined peripheral speed exceeding V1.

  With this configuration, the elastic yarn Y, which has been in a high tension before passing through the feed roller 27, relaxes after passing through the feed roller 27. Therefore, the contact roller 18 is moved from the contact roller 18 to the winding ball 3 with low tension. It can be wound up, and the residual shrinkage of the yarn Y can be suppressed. Since the free length at which the yarn is fed at a low tension upstream from the traverse guide 5 can be set to the distance q from the feed roller 27 to the traverse guide 5, not the distance from the downstream godet roller GR2 to the traverse guide 5. Compared with the conventional configuration (FIG. 7B), windage loss on the upstream side of the traverse guide 5 can be reduced, and yarn ballooning on the upstream side of the traverse guide 5 can be reduced. Further, since the free length of the yarn Y on the downstream side of the traverse device 4 can be set to only the distance L from the traverse guide 5 to the peripheral surface of the contact roller 18, the axis when the yarn Y is wound around the winding ball 3. The stay of the yarn Y at the directional end can be minimized. Therefore, it is possible to avoid a state in which both ends in the axial direction of the package are thick (ear height state), and it is possible to improve the final package shape.

  Furthermore, in this embodiment, the free length (free length; distance q shown in FIG. 3B) of the yarn between the feed roller 27 and the traverse device 4 is four times the traverse width w in the traverse device 4. (Ie, q≈4 × w). Accordingly, since the free length q at a low tension can be shortened, air resistance and ballooning are prevented from occurring between the feed roller 27 and the traverse device 4 even when the yarn Y is wound at a high speed, thereby smoothly winding the yarn Y. It can be.

  In addition, when the free length q of the yarn between the feed roller 27 and the traverse device 4 becomes larger than 5 times the traverse width w, the tension of the yarn Y when wound around the winding ball 3 is larger. The tension at the part pulled away from the feed roller 27 part is greatly reduced by the air resistance (windage loss), and if the tension at the time of winding onto the winding ball 3 is to be lowered, the tension at the time of separating from the feed roller 27 Is not preferable in that the yarn Y can be wound around the feed roller 27. On the other hand, if the free length q is less than 3 times the traverse width w, the distance from the traverse fulcrum to the winding ball 3 will open too much at the traverse stroke end and the center, and the yarn tension fluctuation will be too large. It is not preferable. After all, the free length q of the yarn Y is preferably 3 × w ≦ q ≦ 5 × w.

  In the above-described embodiment, the air cylinder that supports a part of the weight of the slide box (support member) 1 is omitted, and the weight of the slide box 1 is supported only by the ball screw mechanism (drive means) as described above. You may comprise. However, from the viewpoint of reducing the load acting on the ball screw mechanism, it is preferable to provide means for supporting a part of the weight of the slide box 1, such as an air cylinder.

  In addition, the contact roller 18 may be actively driven. However, when the contact roller 18 is used for the purpose of low contact pressure, the configuration in which the contact roller 18 is driven and rotated as in the above-described embodiment is preferable. . When driving the contact roller 18, the rotation speed on the contact roller 18 side may be controlled so as to satisfy the above-described condition (V1 <V2).

  The elastic yarn winder of the above embodiment is mainly intended to wind up the elastic yarn Y with a low contact pressure. In this case, the elastic yarn winder exhibits a great effect, but with a high contact pressure. You may use when using. Further, as shown in another embodiment of FIG. 6, the contact roller 18 may be supported by the slide box 1 as a support member so that the relative position with respect to the slide box 1 cannot be changed. In this case, it is preferable that the contact roller 18 is positively driven and the bobbin holder 11 is driven to rotate. Further, although a change in arrangement is required, the downstream godet roller GR2 may be omitted in FIG.

  In addition to the type in which the support member (slide box 1) rises according to the roll thickness of the ball 3, as in the above embodiment, the support member is fixed and the bobbin B side is in accordance with the roll thickness. It can also be applied to a moving type (where the turret plate 2 rotates as the roll becomes thicker and the bobbin B retracts from the contact roller 18). The present invention is extremely effective when the winding speed of the elastic yarn (the peripheral speed of the contact roller 18) is 900 m / min or more.

1 is a schematic front view of an elastic yarn winding system according to an embodiment of the present invention. 1 is an overall front view of an elastic yarn winder according to an embodiment of the present invention. FIG. 3A is an enlarged front view of the main part showing the configuration of the slide box, and FIG. 3B is a view taken along the line xx of FIG. The control system figure of the winding machine for elastic yarns. The figure which showed a mode that an arm tilted according to the winding thickness of a roll ball. The principal part enlarged front view which shows another embodiment of the winding machine for elastic yarns. The schematic diagram which shows the 1st example and 2nd example of the conventional winding machine.

Explanation of symbols

4 Traverse device 5 Traverse guide 18 Contact roller 27 Feed roller M Elastic yarn winder q Free length of yarn between feed roller and traverse device V1 Peripheral velocity of feed roller V2 Peripheral velocity of contact roller w Traverse width Y Elastic yarn

Claims (6)

A pair of godet rollers that picks up and feeds the elastic yarn spun from the spinning machine, and a contact roller that contacts the outer peripheral surface of the wound ball during winding of the elastic yarn, and a traverse device is provided upstream of the contact roller in the yarn traveling direction. In an elastic yarn winding system in which an elastic yarn traversed by the traverse device is wound around the winding ball via the contact roller,
A feed roller is provided between the godet roller pair and the traverse device, and the rotational speeds of the feed roller and the contact roller are controlled so that the peripheral speed of the feed roller is higher than the peripheral speed of the contact roller. A winding system for elastic yarns. An elastic yarn winding machine provided on the downstream side in the yarn traveling direction with respect to a godet roller pair that picks up and feeds an elastic yarn spun from a spinning machine, and is in contact with the outer peripheral surface of the winding ball during winding of the elastic yarn A contact roller is provided, and a traverse device is provided upstream of the contact roller in the yarn traveling direction, and the elastic yarn traversed by the traverse device is wound around the winding ball through the contact roller. In
A feed roller is provided on the upstream side in the yarn traveling direction of the traverse device, and the rotational speeds of the feed roller and the contact roller are controlled so that the peripheral speed of the feed roller is higher than the peripheral speed of the contact roller. An elastic yarn winder. A contact roller that contacts the outer peripheral surface of the wound ball during winding of the elastic yarn is provided, and a traverse device is provided on the upstream side of the contact roller in the yarn traveling direction, and the elastic yarn traversed by the traverse device is the contact roller. In an elastic yarn winder that is wound around the winding ball via
A feed roller is provided on the upstream side of the traverse device in the yarn traveling direction,
The feed roller is disposed away from the traverse device so that the free length of the yarn between the feed roller and the traverse device is not less than 3 times and not more than 5 times the traverse width in the traverse device,
The elastic yarn winder is characterized in that the rotational speeds of the feed roller and the contact roller are controlled so that the peripheral speed of the feed roller is higher than the peripheral speed of the contact roller. An elastic yarn winder according to claim 2 or claim 3,
A support member that is movable in a direction approaching and separating from the wound ball is further provided, and the contact roller is supported by the support member so that the position of the contact roller can be changed, and the traverse device is the support member. A winder for elastic yarn, wherein the winder is fixed and supported with respect to the elastic yarn. The elastic yarn spun from the spinning machine is taken out and sent out by a pair of godet rollers, the elastic yarn from the pair of godet rollers is traversed by a traverse device, and the elastic yarn traversed by the traverse device is passed through a contact roller. In the winding method of the elastic yarn that is wound around the winding ball,
A feed roller is provided between the godet roller pair and the traverse device, and the peripheral speed of the feed roller is set to be higher than the peripheral speed of the contact roller, and the elastic yarn from the godet roller pair is overfeeded by the feed roller. A method for winding an elastic yarn, wherein the elastic yarn is fed to the contact roller in a state.   6. The elastic yarn winding method according to claim 5, wherein a winding speed of the elastic yarn is 900 meters per minute or more.

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