JP2009007110A - Yarn winding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn winding device reduced in winding failure of a yarn around an empty bobbin when switching bobbins and capable of accurately controlling the amount of bunch winding formed after winding the yarn around the empty bobbin. <P>SOLUTION: This yarn winding device comprises a yarn thrust guide 30 for thrusting a yarn Y to a bunch winding position outside a traverse range in the axial direction of the bobbin 20 when the yarn Y reaches a full-wound package 21 through an empty bobbin 20b, a yarn fall preventing guide 31 for preventing a fall of the yarn Y from the empty bobbin 20b, from the full-wound package 21, and a yarn holding mechanism 40 for holding the yarn Y thrusted to the bunch winding position by the yarn thrust guide 30 when switching the bobbins. Further, a fixed guide 41 of the yarn holding mechanism 40 is integrally provided with the yarn fall preventing guide 31, and a movable portion 42 of the yarn holding mechanism 40 is integrally provided with the yarn thrust guide 30. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a yarn winding device configured to wind a continuously supplied yarn around a bobbin to form a package and to switch between a bobbin in which a fully wound package is formed and an empty bobbin.

  Conventionally, a yarn winding device (take-up winder) that winds a yarn continuously supplied from a spinning machine onto a bobbin is known. As shown in Patent Document 1, this yarn winding device rotates a bobbin holder on which a plurality of bobbins are mounted while traversing a plurality of supplied yarns in the axial direction of the bobbin by a traverse device. The plurality of bobbins are wound around the yarns to form a plurality of winding packages at the same time. Further, this yarn winding device has two bobbin holders each supported by a rotatable turret. When the package formed on the bobbin attached to one bobbin holder is fully wound, the bobbin formed with the fully wound package is turned into an empty bobbin attached to the other bobbin holder by rotating the turret. It is comprised so that it may switch to.

  This bobbin switching operation (bobbin change) will be described in more detail. When a fully wound package is formed on the bobbin mounted on one bobbin holder, the turret is rotated to move the fully wound package from the yarn winding position where the outer peripheral surface contacts the contact roller, and the other bobbin holder A yarn that travels toward the full package is brought into contact with the empty bobbin attached to the. Next, after the yarn gathering guide is advanced on the yarn path from the empty bobbin to the full winding package, this yarn gathering guide is moved in the axial direction of the bobbin to bring the yarn closer to the end of the empty bobbin. In this yarn shifting operation, in order to take out the yarn end of the package in the next process and to facilitate piecing with the yarn end of another package, the yarn end is placed on the end portion away from the main winding portion in the axial center portion of the bobbin. This is because a so-called bunch winding is performed.

  If the rotation of the bobbin holder with the downstream full winding package is decelerated while the yarn is continuously supplied from the spinning machine, the yarn tension between the empty bobbin and the full winding package decreases. The slack thread winds around the bunch winding position of the empty bobbin. In this state, the bobbin holder on which the empty bobbin is mounted rotates, so that formation of the bunch winding is started at the bunch winding position of the empty bobbin. Furthermore, when bunch winding is started and the yarn is wound around the empty bobbin, the yarn tension between the empty bobbin and the full package increases and the yarn is torn off, and the yarn is completely passed to the empty bobbin. It will be in the state.

JP 2002-114443 A

  In the above-described yarn winding device disclosed in Patent Document 1, after the yarn is moved to the bunch winding position at the end of the empty bobbin by the yarn moving guide, the rotation of the full winding package on the downstream side is decelerated to thereby remove the yarn from the empty bobbin. The bunch is wound around the bunch winding position. However, since the full package has a large moment of inertia, it is difficult to rapidly decelerate its rotation. For this reason, the yarn tension cannot be rapidly reduced, and a high tension state may continue for a while, which may cause a yarn winding failure around the empty bobbin. Further, even when the yarn is normally wound around the empty bobbin, the winding timing (timing at which the bunch winding is started) depends on a temporal change in the yarn tension from the start of deceleration of the full winding package. However, the temporal change in yarn tension cannot be accurately predicted and is almost impossible to manage. Therefore, it is impossible to correctly grasp the timing of winding the yarn around the empty bobbin (bunch winding start timing), and as a result, the amount of bunch winding (number of windings) cannot be accurately managed, and the bunch winding amount varies between packages. End up.

  An object of the present invention is to provide a yarn winding device capable of reducing the yarn winding defect around the empty bobbin when the bobbin is switched and accurately managing the amount of bunch winding formed after being wound around the empty bobbin. It is to be.

Means for Solving the Problems and Effects of the Invention

  According to a first aspect of the present invention, a yarn winding device includes a plurality of bobbin holders to which bobbins are respectively mounted, a traverse device for traversing the yarn wound on the bobbins, and a bobbin mounted on a bobbin holder at a yarn winding position. Switching means for switching the bobbin on which the yarn is wound up from the bobbin on which the full-winding package is formed to an empty bobbin mounted on another bobbin holder after the full-winding package is formed with respect to the empty bobbin. And when the bobbin is switched by the switching means, when the yarn reaches the full package via the empty bobbin, the empty bobbin and the full package A yarn gathering guide for bringing the intervening yarn to the bunch winding position outside the traverse range by the traverse device, and the bunching guide by the yarn gathering guide. And it is characterized in that it comprises a yarn gripping means for gripping the thread provided by, the winding position.

  In the yarn winding device of the present invention, the traverse device traverses the bobbin mounted on the bobbin holder at the yarn winding position among the plurality of bobbin holders, whereby the traverse of the traverse device is wound on this bobbin. A package having a predetermined width corresponding to the range (trailing width) is formed.

  Thereafter, when the fully wound package is formed on the bobbin, the bobbin on which the yarn is wound is switched by the switching means from the bobbin on which the fully wound package is formed to the empty bobbin mounted on another bobbin holder. Next, the yarn gathering guide advances to the yarn path between the empty bobbin and the full package, and the yarn between the empty bobbin and the full package moves in the axial direction of the bobbin, so that the yarn moves from the traverse range. Is also moved to the bunch winding position on the outer side in the axial direction.

  Further, the yarn brought to the bunch winding position is gripped by the yarn gripping means. In this way, when the yarn is gripped between the empty bobbin and the fully wound package, the tension of this yarn suddenly decreases and slackening occurs upstream, so the yarn is immediately wound around the empty bobbin, Thread winding defects are less likely to occur. Furthermore, as soon as the thread is gripped by the thread gripping means, the thread tension decreases and the thread is wound, so the thread gripping timing is almost equal to the thread winding timing, and the bunch winding start timing is grasped. Can do. Therefore, it is possible to accurately manage the bunch winding amount, and to prevent the bunch winding amount from being varied between packages.

  The yarn winding device according to a second aspect of the present invention is the yarn winding device according to the first aspect, wherein the yarn holding guide maintains the yarn holding state for a predetermined time after the yarn is held by the yarn holding means. It is characterized by.

  When the yarn is grasped by the yarn grasping means, the yarn tension is suddenly reduced, and the yarn is immediately wound around the empty bobbin. Therefore, the bunch winding amount can be accurately managed only by maintaining the yarn shifting state of the yarn shifting guide for a predetermined time after the yarn is gripped, and the bunch winding amount varies between packages. Can be easily prevented.

  The yarn winding device according to a third aspect of the present invention is the first or second aspect of the invention, in which the yarn gripping means is fixed to the fixed portion that cannot move in the axial direction with respect to the empty bobbin; A movable portion movable in the axial direction of the empty bobbin, and the movable portion and the fixed portion cooperate when the movable portion moves in the axial direction of the empty bobbin relative to the fixed portion. And is configured to grip the yarn.

  According to this configuration, after the yarn is brought to the bunch winding position by the yarn gathering guide, the movable portion moves in the axial direction of the bobbin with respect to the fixed portion, so that the yarn brought to the bunch winding position is fixed. And the movable part.

The yarn winding device according to a fourth aspect of the present invention further includes a yarn drop prevention guide that prevents the yarn from the empty bobbin from falling from the full winding package when the bobbin is switched by the switching unit in the third aspect of the invention.
The fixed portion is provided integrally with the yarn drop prevention guide, and the movable portion is provided integrally with the yarn guide.
When the yarn gathering guide moves in the axial direction of the empty bobbin with respect to the yarn dropping prevention guide to bring the yarn closer to the bunch winding position, at the same time, the movable part also moves the empty bobbin against the fixed part. The movable portion and the fixed portion move in the axial direction and are configured to grip the yarn.

  In the present invention, the fixed portion of the yarn gripping means is provided integrally with the yarn drop prevention guide, and the movable portion of the yarn gripping means is provided integrally with the yarn guide. Then, in a state where the yarn dropping from the full-winding package is prevented by the yarn dropping prevention guide, the yarn moving guide moves in the axial direction of the bobbin, whereby the yarn is moved to the bunch winding position by the yarn moving guide, The yarn is gripped by the movable portion provided in the yarn guide and the fixed portion provided in the yarn dropping prevention guide. According to this configuration, by moving the movable portion of the yarn gripping unit integrally with the yarn guide, the yarn guide to the bunch winding position and the yarn grip can be performed simultaneously, so that the configuration can be simplified. .

  Embodiments of the present invention will be described. FIG. 1 is a schematic front view of the yarn winding device of the present embodiment.

  As shown in FIG. 1, a plurality of yarns (for example, elastic yarns) are continuously supplied from a spinning machine (not shown) through godet rollers 2 and 3 to the yarn winding device 1 of the present embodiment. The yarn winding device 1 forms a plurality of winding packages 21 by winding the plurality of yarns Y supplied from the spinning machine onto the plurality of bobbins 20 attached to the bobbin holder 13.

  The yarn winding device 1 includes a machine frame 10, a disk-shaped turret 12 rotatably provided on the machine frame 10, and two bobbin holders 13 supported by the turret 12 and mounted with a plurality of bobbins 20. (13a, 13b), the traverse device 14 traversing the yarn Y wound around the bobbin 20, and the bobbin 20 mounted on the bobbin holder 13 at the winding position P1 (or the package 21 formed on the outer periphery of the bobbin 20) ) And a yarn passing device 16 for passing the yarn Y between the two bobbin holders 13.

  2 is a view taken along the line II-II in FIG. The disc-shaped turret 12 is rotatably provided on the machine casing 10 in a posture parallel to the vertical plane of the machine casing 10. Two bobbin holders 13 (13a, 13b) extending in the horizontal direction orthogonal to the turret 12 are provided so as to be rotatable at two positions symmetrical to each other with respect to the rotation center of the turret 12. Further, these two bobbin holders 13 rotate integrally with the turret 12. As shown in FIG. 2, a plurality (eight in the present embodiment) of bobbins 20 are mounted in each bobbin holder 13 side by side in the axial direction of the bobbin holder 13.

  The turret 12 is rotationally driven by a motor (not shown). As the turret 12 rotates, the two bobbin holders 13 come into contact with the contact roller 15 and the upper yarn winding position P1 where the yarn Y is wound around the bobbin 20, and the rotation center of the yarn winding position P1 and the turret 12 Can be moved over a lower standby position P2 which is a point-symmetrical position with respect to.

  When the fully wound package 21 is formed on the bobbin 20 attached to the bobbin holder 13 (the bobbin holder 13a in FIG. 1) at the yarn winding position P1, the turret 12 is moved in the arrow direction (counterclockwise direction) in FIG. The bobbin holder 13a that rotates and is positioned at the yarn winding position P1 and the bobbin holder 13b that is positioned at the standby position P2 are switched. That is, the bobbin 20 on which the yarn Y is wound is switched from the bobbin 20a on which the full package 21 of one bobbin holder 13a is formed to the empty bobbin 20b mounted on the other bobbin holder 13b at the standby position P2. The turret 12 that performs this bobbin switching corresponds to the switching means of the present invention.

  When the bobbin is switched by the turret 12, the bobbin holder 13 at the standby position P2 is once rotated 90 degrees further in the direction of the arrow than the yarn winding position P1, as shown in FIG. It has moved 270 degrees from P2) and moved to the yarn passing position P3. Then, after the yarn Y is delivered from the full winding package 21 to the empty bobbin 20b at the yarn delivery position P3 by the yarn delivery device 16 described later, the bobbin holder 13b on which the empty bobbin 20b is mounted moves to the yarn winding position P1. The winding of the yarn around the empty bobbin 20b is started.

  The two bobbin holders 13 supported by the turret 12 are each driven to rotate by a motor (not shown). Then, when the bobbin holder 13 at the yarn winding position P1 rotates, the plurality of yarns Y are wound around the plurality of bobbins 20 mounted on the bobbin holder 13, respectively.

  A lift box 17 that is long in the axial direction of the bobbin holder 13 is provided at a portion above the turret 12 of the machine frame 10 so as to be movable up and down. The elevating box 17 supports a traverse device 14 and a contact roller 15.

  The traverse device 14 includes a plurality of traverse guides 14a corresponding to the plurality of bobbins 20 mounted on the bobbin holder 13 at the yarn winding position P1. The traverse device 14 then moves the plurality of traverse guides 14a to a predetermined traverse range with respect to the axial direction of the bobbin holder 13 (in the direction perpendicular to the plane of FIG. 1) while the plurality of yarns Y are respectively hung on the plurality of traverse guides 14a. It is comprised so that it may reciprocate with. Thereby, it is possible to simultaneously form a plurality of packages 21 by winding the plurality of yarns Y around the corresponding bobbins 20 while traversing them.

  The contact roller 15 is rotatably supported by the lift box 17 in a state parallel to the bobbin holder 13. The contact roller 15 adjusts the shape of the package 21 by rotating while applying a predetermined contact pressure to the package 21 when winding the yarn around the bobbin 20.

  Next, the yarn passing device 16 will be described in detail. 3 is a perspective view of the contact roller 15, the two bobbin holders 13, and the yarn passing device 16. FIG. 4 is a perspective view of the contact roller 15, the two bobbin holders 13, and the yarn passing device 16 from above. It is a front view.

  As shown in FIGS. 1 to 4, when the bobbin is switched by the turret 12, the yarn passing device 16 places the yarn Y into the bunch winding position at the axial end of the empty bobbin 20 b in order to form the bunch winding 22 on the empty bobbin 20 b. And a yarn drop prevention guide 31 for preventing the yarn Y from the empty bobbin 20b from falling from the full package 21.

  FIG. 5 is a partially enlarged plan view of the yarn shifting guide 30, and FIG. 6 is a partially enlarged plan view of the yarn dropping prevention guide 31. As shown in FIGS. 2 to 6, both the yarn gathering guide 30 and the yarn dropping prevention guide 31 are long plate-like members extending in the axial direction of the bobbin 20 (bobbin holder 13). The yarn drop prevention guides 31 are arranged so as to overlap each other. Further, as shown in FIG. 1, the yarn shifting guide 30 and the yarn dropping prevention guide 31 are attached to the distal end portion of a swing arm 32 that is swingably provided on the machine frame 10.

  FIG. 7 is a diagram showing a state when the full package 21 and the empty bobbin 20b are switched. When the full-winding package 21 is formed on the bobbin 20a of one bobbin holder 13a at the yarn winding position P1 as shown in FIG. 7A, the turret 12 is moved in the direction of the arrow (reverse direction) as shown in FIG. The bobbin holder 13b mounted with the empty bobbin 20b that has been waiting at the standby position P2 reaches the yarn winding position P1 after rotating 180 degrees in the clockwise direction), and the yarn Y contacts the empty bobbin 20b. . Thereafter, the turret 12 further rotates 90 degrees in the direction of the arrow, and as shown in FIG. 7C, the bobbin holder 13b moves from the yarn winding position P1 to the yarn passing position P3.

  Here, as shown in FIG. 7C, when the yarn Y reaches the full package 21 via the empty bobbin 20b, the yarn guide 30 and the yarn drop prevention guide of the yarn passing device 16 are used. 31 swings integrally with the swing arm 32. The yarn gathering guide 30 and the yarn dropping prevention guide 31 are retracted from the empty bobbin 20b (the position indicated by the two-dot chain line in FIG. 7C), and between the empty bobbin 20b and the fully wound package 21 from the retracted position. It is possible to move across the advance position (solid line position in FIG. 7C) that has advanced to the yarn path Y2. When the yarn guide 30 and the yarn drop prevention guide 31 are in the retracted position, the yarn path Y2 ′ between the empty bobbin 20b and the full package 21 is on a common tangent line between the empty bobbin 20b and the full package 21. However, when the yarn gathering guide 30 and the yarn dropping prevention guide 31 advance to the advance position, the yarn path Y2 ′ is pushed up to the vicinity of the yarn path Y1 between the contact roller 15 and the empty bobbin 20b, and FIG. ) To the yarn path Y2.

  As shown in FIG. 7C, the bobbin holder 13 is moved not to the yarn winding position P1 but to the yarn passing position P3 rotated 90 degrees further in the arrow direction from the yarn winding position P1. This is for increasing the contact length (winding angle) of the yarn Y to the empty bobbin 20b when the yarn 30 and the yarn drop prevention guide 31 are advanced to the advanced position so that the yarn Y can easily be wound around the empty bobbin 20b. .

  The yarn guide 30 is connected to the swing arm 32 so as to be relatively movable (slidable) in the longitudinal direction, that is, in the axial direction of the bobbin 20 (bobbin holder 13) with respect to the yarn drop prevention guide 31. That is, the yarn guide 30 can be moved relative to the bobbin 20 attached to the bobbin holder 13 in the axial direction. As shown in FIG. 2, the yarn guide 30 is connected to a rod 33 a of a fluid pressure cylinder 33 fixed to the upper surface of the yarn drop prevention guide 31 via a connecting member 34. Then, as the rod 33a of the fluid pressure cylinder 33 advances and retracts, the yarn guide 30 is driven in the axial direction of the bobbin 20 (left and right in FIG. 2) with respect to the yarn drop prevention guide 31. As the driving means for driving the yarn guide 30 in the axial direction of the bobbin 20, it is possible to adopt known driving means such as a stepping motor in addition to the fluid pressure cylinder 33.

  As shown in FIGS. 2 to 5, a plurality of V-shaped cutout shapes respectively corresponding to the plurality of bobbins 20 mounted on the bobbin holder 13 are provided at the tip end portion (the portion facing the empty bobbin 20) of the yarn guide 30. The engaging portion 30a is formed. Further, as shown in FIGS. 3 and 7C, the engaging portion 30a of the yarn guide 30 is not limited to the yarn path Y2 from the empty bobbin 20b to the fully wound package 21, but also from the contact roller 15 to the empty bobbin 20b. Advance to Y1 leading to Y. That is, in the engaging portion 30a, the yarn portion of the yarn path Y2 is engaged with the inner portion thereof, and the yarn portion of the yarn path Y1 is also accommodated.

  The yarn pressure guide 33 is driven in the axial direction of the bobbin 20 with respect to the yarn drop prevention guide 31 by the fluid pressure cylinder 33, whereby the yarn portion of the yarn path Y1 and the yarn path Y2 for each of the plurality of yarns Y. Is moved to the bunch winding position outside the traverse range T (see FIG. 4) of the traverse device 14 (traverse guide 14a) in the axial direction. In this state, when the bobbin holder 13 to which the empty bobbin 20b is mounted rotates, a rod-like bunch winding 22 is formed at each end of the plurality of empty bobbins 20b mounted to the bobbin holder 13.

  The thread drop prevention guide 31 is fixedly connected to the swing arm 32. That is, unlike the above-described yarn moving guide 30, the bobbin 20 cannot move in the axial direction. As shown in FIGS. 2 to 4 and FIG. 6, the tip of the yarn drop prevention guide 31 (the portion facing the empty bobbin 20) corresponds to each of the plurality of bobbins 20 attached to the bobbin holder 13. A plurality of notches 31a are formed. Each notch 31a has a shape cut out at right angles to the outer edge of the tip of the yarn drop prevention guide 31 on one side in the longitudinal direction of the guide (on the right side in FIG. 6), while the other side is the tip. The cutout shape is gently inclined with respect to the outer edge.

  As shown in FIGS. 3 and 7C, when the bobbin switching is performed, when the yarn drop prevention guide 31 advances together with the yarn guide guide 30 to the yarn path Y2 from the empty bobbin 20b to the full package 21, this yarn path The yarn portion Y2 engages with the engagement portion 30a of the yarn guide 30, and also engages with the notch 31a of the yarn drop prevention guide 31. This prevents the yarn Y traveling from the empty bobbin 20b to the full winding package 21 from dropping from the end surface of the full winding package 21 until the yarn drop prevention guide 31 returns to the retracted position.

  By the way, in the yarn passing device 16 of the present embodiment, the yarn Y is wound around the empty bobbin 20b after the yarn Y is moved to the bunch winding position of the empty bobbin 20b by the yarn moving guide 30. A thread gripping mechanism 40 (thread gripping means) that grips and reduces thread tension is provided.

  FIG. 8A is a partially enlarged plan view of the yarn passing device 16 in a state before yarn gathering, and FIG. 8B is an orientation of the yarn gathering guide 30 and the yarn dropping prevention guide 31 of FIG. FIG. FIG. 9A is a partially enlarged plan view of the yarn passing device 16 in the yarn shifting state, and FIG. 9B is a direction in which the yarn shifting guide 30 and the yarn dropping prevention guide 31 of FIG. FIG. 8 and 9, an arrow A indicates the traveling direction of the yarn Y.

  As shown in FIGS. 6 to 9, the thread gripping mechanism 40 is provided integrally with the thread drop prevention guide 31 and is fixed to the empty bobbin 20b and cannot move in the axial direction thereof. It is provided integrally with the yarn gathering guide 30 and has a movable part 42 that can move in the axial direction of the empty bobbin 20 b with respect to the empty bobbin 20 b and the fixed guide 41 together with the yarn gathering guide 30. A plurality of fixed guides 41 and movable portions 42 are provided corresponding to the plurality of bobbins 20, similarly to the plurality of notches 31 a of the yarn drop prevention guide 31 and the plurality of engaging portions 30 a of the yarn guide 30.

  The fixed guide 41 includes a base portion 41a extending along the yarn drop prevention guide 31, and a guide portion 41b that is bifurcated from one end of the base portion 41a and extends downwardly with respect to the base portion 41a. The fixed guide 41 has a bifurcated guide portion 41b facing a notch 31a formed in the yarn drop prevention guide 31 and a base portion 41a at the tip of the plate-like yarn drop prevention guide 31. The back surface (the surface facing the yarn guide 30) is fixed with two screws.

  The movable part 42 consists of a leaf spring bent in a U shape. Then, in a state where the U-shaped open side faces the engaging portion 30a of the yarn gathering guide 30, one end of the leaf spring is the surface of the yarn gathering guide 30 (opposite surface to the yarn dropping prevention guide 31). It is fixed with two screws.

  As shown in FIGS. 8A and 8B, a state immediately after the yarn gathering guide 30 and the yarn dropping prevention guide 31 have advanced to the yarn path Y2 between the empty bobbin 20b and the fully wound package 21 (yarn gathering). In the previous state), the engagement portion 30a of the yarn guide 30 and the cutout portion 31a of the yarn drop prevention guide 31 are in substantially the same position in the axial direction of the bobbin 20, and engage with the engagement portion 30a and the cutout portion 31a. The thread Y to be performed is in a state substantially orthogonal to the axial direction of the bobbin 20. In addition, the movable portion 42 provided in the yarn shifting guide 30 and the fixed guide 41 provided in the yarn dropping prevention guide 31 are located on opposite sides of the engaging portion 30a and the notch portion 31a.

  From this state, as shown in FIG. 9, when the yarn guide 30 is driven in the axial direction of the bobbin 20 (direction of arrow B in FIG. 9) by the fluid pressure cylinder 33 (see FIG. 2), the yarn guide 30 The yarn Y engaged with the engaging portion 30a is moved to the bunch winding position at the bobbin end by the yarn moving guide 30 while being engaged with the notch 31a of the yarn dropping prevention guide 31. At this time, the movable portion 42 provided integrally with the yarn guide 30 also moves in the axial direction of the bobbin 20 with respect to the fixed guide 41. Then, the movable part 42 made of a leaf spring presses the thread Y by the spring biasing force while pushing the thread Y between the engaging part 30a and the notch part 31a into the bifurcated guide part 41b of the fixed guide 41, The thread Y is gripped (clamped) in cooperation with the guide portion 41b.

  Here, since the yarn Y is continuously supplied from the spinning machine, when the yarn Y is gripped between the movable portion 42 and the guide portion 41b of the fixed guide 41, the yarn Y on the upstream side from the gripping position. The tension of the yarn decreases rapidly and the yarn Y loosens instantly. Therefore, the yarn Y is wound around the empty bobbin 20b and the formation of the bunch winding 22 on the empty bobbin 20b is started by the rotation of the bobbin holder 13b. In this way, as soon as the yarn Y is gripped, the yarn Y is wound around the empty bobbin 20b, so the timing at which the yarn Y is gripped is almost equal to the timing at which the bunch winding starts. Therefore, the bunch winding amount can be accurately managed only by setting the time for maintaining the yarn-feeding state by the yarn-feeding guide 30 after gripping the yarn Y.

  Next, the electrical configuration of the yarn winding device 1 will be briefly described. As shown in FIG. 1, a control device 50 that controls the overall operation of the yarn winding device 1 is provided in the machine casing 10. The control device 50 includes a CPU (Central Processing Unit) which is an arithmetic processing unit, a ROM (Read-Only Memory) in which a program executed by the CPU and data used in the program are stored, and data when the program is executed. It is composed of a RAM (Random Access Memory) for temporary storage. The control device 50 includes a motor that rotationally drives the turret 12, a motor that rotationally drives the bobbin holder 13, a traverse device 14, based on a command input by an operator from an operation box 51 provided in the machine casing 10. The operation of each part of the yarn winding device 1 such as the contact roller 15 and the fluid pressure cylinder 33 of the yarn passing device 16 is controlled.

Next, a series of operations when the bobbin is switched by the yarn winding device 1 will be described.
As shown in FIG. 7A, when the full-winding package 21 is formed on the bobbin 20a of the bobbin holder 13a at the yarn winding position P1, the arrow direction (counterclockwise direction) is formed as shown in FIG. ), The turret 12 is rotated 180 degrees, the bobbin holder 13b located at the standby position P2 is moved to the yarn winding position P1, and the yarn Y is brought into contact with the empty bobbin 20b attached to the bobbin holder 13b.

  Further, the turret 12 is rotated 90 degrees in the direction of the arrow, and as shown in FIG. 7C, the bobbin holder 13 to which the empty bobbin 20b is attached is moved to the yarn passing position P3. Then, the yarn guide 30 and the yarn drop prevention guide 31 of the yarn passing device 16 are moved from the retracted position indicated by the two-dot chain line to the advanced position indicated by the solid line, and the leading ends of both guides 30 and 31 are moved to the empty bobbin 20b. Advancing to the yarn path Y2 that reaches the full package 21 via the route. Then, in a state where the yarn portion of the yarn path Y2 is engaged with the engaging portion 30a of the yarn guide 30 and the notch portion 31a of the yarn dropping prevention guide 31, this yarn portion is pushed up, and the yarn portion of the yarn path Y2 contacts the yarn portion Y2. It approaches to the vicinity of the yarn path Y1 from the roller 15 to the empty bobbin 20b. Thereby, the yarn contacts almost the entire circumference of the outer peripheral surface of the empty bobbin 20b. At this time, as shown in FIG. 3, the engagement portion 30a of the yarn guide 30 engages the yarn portion of the yarn path Y2 with the inner portion thereof, and also accommodates the yarn portion of the yarn path Y1. .

  In the state before the yarn gathering, as shown in FIG. 8, the engaging portion 30a of the yarn gathering guide 30 and the notch portion 31a of the yarn dropping prevention guide 31 are in substantially the same position in the axial direction of the bobbin 20, and The yarn Y engaged with the portion 30a and the notch portion 31a runs in a direction substantially orthogonal to the axial direction of the bobbin 20. From this state, the yarn pressure guide 30 is driven in the axial direction of the bobbin 20 (in the direction of arrow B in FIG. 9) with respect to the yarn drop prevention guide 31 by the fluid pressure cylinder 33. Then, as shown in FIGS. 9A and 9B, the yarn guide guide 30 accommodates the yarn portion of the yarn path Y2 engaged with the engaging portion 30a and the engaging portion 30a. The yarn portion of the existing yarn path Y1 is brought closer to the bunch winding position at the axial end of the bobbin 20 further outside the traverse range T of the traverse device 14 (traverse guide 14a).

  At the same time, the movable portion 42 made of a leaf spring provided in the yarn shifting guide 30 is in the axial direction of the bobbin 20 with respect to the fixed guide 41 provided in the yarn dropping prevention guide 31 (in the direction of arrow B in FIG. 9). ) Then, the movable portion 42 pushes the yarn Y between the engaging portion 30a of the yarn guide 30 and the cutout portion 31a of the yarn dropping prevention guide 31 into the bifurcated guide portion 41b of the fixed guide 41, and guide portion 41b. The thread Y is gripped in cooperation with.

  When the yarn Y is gripped by the movable portion 42 and the fixed guide 41 in this way, the yarn tension is rapidly reduced, and the yarn Y is immediately wound around the bunch winding position of the empty bobbin 20b, and further, the bobbin holder 13 is rotated. Formation of the bunch winding 22 on the empty bobbin 20b is started. In addition, since the yarn Y is wound around the empty bobbin 20b almost simultaneously with the gripping of the yarn Y, the amount (number of windings) of the bunch winding 22 is the duration of the yarn shifting state of the yarn shifting guide 30 after the yarn Y is gripped. Will be almost dependent on. Therefore, by maintaining the yarn gathering state of the yarn gathering guide 30 for a predetermined time set in advance, the amount of the bunch winding 22 can be accurately managed. Specifically, the duration of the yarn gathering state is stored in advance in the storage unit of the control device 50, and the control device 50 controls the fluid pressure cylinder 33 according to the stored time, whereby the yarn gathering state. The yarn shifting state of the guide 30 is continued for a predetermined time.

  When the formation of the bunch winding 22 on the empty bobbin 20b is started, a large tension acts on the yarn portion of the yarn path Y2 between the empty bobbin 20b and the full winding package 21, and the yarn Y is torn off by the tension. To be cut. As a result, the yarn is delivered from the full package 21 to the empty bobbin 20b.

  When the yarn Y is grasped by the yarn grasping mechanism 40, the yarn Y is immediately wound around the empty bobbin 20b, and as soon as the formation of the bunch winding 22 is started, the yarn between the empty bobbin 20b and the fully wound package 21 Since Y is cut, no trouble is caused even if the yarn Y is held by the yarn holding mechanism 40 while the yarn holding state by the yarn holding guide 30 is maintained.

  When a predetermined amount of time elapses after the thread gripping mechanism 40 (the movable portion 42 and the fixed guide 41) grips the thread Y, a desired amount of the bunch winding 22 is formed on the empty bobbin 20b. By driving the yarn guide 30 to the axial direction opposite side of the bobbin 20 (opposite to the arrow B in FIG. 9) by the fluid pressure cylinder 33, the yarn guide 30 is returned to the original position as shown in FIG. . At this time, the holding state of the yarn Y by the yarn holding mechanism 40 (the movable portion 42 and the fixed guide 41) is also released. Further, the yarn guide 30 and the yarn drop prevention guide 31 are retracted to the retracted position of the two-dot chain line in FIG. Then, the movement restriction on the axial direction of the bobbin 20 of the yarn Y by the engaging portion 30a of the yarn moving guide 30 is released, so that the yarn Y is moved in the axial direction within the traverse range T by the traverse guide 14a of the traverse device 14. It is traversed.

  Further, by rotating the turret 12 in the direction opposite to the arrow direction in FIG. 7 (clockwise direction), the bobbin holder 13 on which the empty bobbin 20b is mounted is moved from the yarn passing position P3 to the yarn winding position P1. The outer peripheral surface of the empty bobbin 20b is brought into contact with the contact roller 15. As a result, the yarn Y is wound up while traversing within the traverse range T by the traverse guide 14a in a state where contact pressure is applied to the yarn layer by the contact roller 15, and the package 21 is formed on the bobbin 20. .

  In the yarn winding device described above, the yarn holding guide 30 moves the yarn Y from the empty bobbin 20b toward the full winding package 21 to the bunch winding position, and then the yarn Y is held by the yarn holding mechanism 40. As a result, the yarn tension is suddenly reduced and the yarn Y is immediately wound around the empty bobbin 20b, so that the yarn winding defect is less likely to occur. Further, when the yarn Y is gripped by the yarn gripping mechanism 40, the yarn Y is immediately wound around the empty bobbin 20b, so that the timing of starting the bunch winding can be grasped. Therefore, after the yarn Y is gripped by the yarn gripping mechanism 40, the amount of the bunch winding 22 can be accurately managed only by maintaining the yarn gathering state by the yarn gathering guide 30 for a predetermined time. It is possible to easily prevent the bunch winding amount from being varied between the packages 21.

  The thread gripping mechanism 40 is configured to grip the thread Y by the cooperation of a fixed guide 41 and a movable portion 42 that can move in the axial direction of the bobbin 20 with respect to the fixed guide 41. Further, the fixed guide 41 is provided integrally with the yarn drop prevention guide 31, while the movable portion 42 is provided integrally with the yarn guide 30. Accordingly, the yarn gathering guide 30 moves in the axial direction of the bobbin 20 in a state where the yarn dropping from the full winding package 21 is prevented by the yarn dropping prevention guide 31, so that the yarn Y is bunch-wound by the yarn gathering guide 30. The yarn Y is gripped by the movable portion 42 provided in the yarn gathering guide 30 and the fixed guide 41 provided in the yarn dropping prevention guide 31 while being moved to the position. According to this configuration, since the movable portion 42 of the yarn gripping mechanism 40 is moved integrally with the yarn guide guide 30, the yarn guide to the bunch winding position and the subsequent gripping of the yarn Y can be performed simultaneously. , The configuration can be simplified.

  In addition, the following various modifications can be made to the above-described embodiment without departing from the spirit of the present invention. In addition, in the following description, what has the same structure as the said embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description suitably.

  In the above embodiment, the fixed guide 41 and the movable portion 42 of the yarn gripping mechanism 40 are integrally provided in the yarn dropping prevention guide 31 and the yarn shifting guide 30, respectively, but the fixed guide 41 and the movable portion 42 are The movable part 42 may be provided separately from the yarn dropping prevention guide 31 and the yarn gathering guide 30 and configured to be movable in the axial direction of the bobbin 20 independently of the sliding movement of the yarn gathering guide 30.

  In the embodiment, in order to increase the winding angle of the yarn Y around the empty bobbin 20b, the empty bobbin 20b is positioned at the yarn passing position P3 which is further rotated 90 degrees from the yarn winding position P1. Yarn passing to the empty bobbin 20b is performed. However, if the yarn winding failure to the empty bobbin 20b is relatively difficult to occur due to various conditions such as the type of yarn Y to be wound and the yarn tension, the empty bobbin 20b is positioned at the yarn winding position P1 and the standby Yarn passing may be performed in a state where the full-winding package 21 is located at the position P2.

It is a schematic front view of the yarn winding device according to the embodiment of the present invention. It is the II-II arrow directional view of FIG. It is a perspective view of a contact roller, a bobbin holder, and a yarn passing device. FIG. 4 is a front view of the contact roller, bobbin holder, and yarn passing device of FIG. 3 as viewed obliquely from above. It is a partially expanded plan view of the yarn guide. It is a partially expanded plan view of the thread drop prevention guide. It is a figure which shows the state at the time of switching of a full winding package and an empty bobbin, (a) shows the state just before switching, (b) in the middle of switching, and (c) shows the state during thread passing. (A) is a partially enlarged plan view of the yarn passing device in a state before yarn gathering, and (b) is a view of the yarn gathering guide and yarn dropping prevention guide of (a) viewed from the upper side of the paper in a direction parallel to the paper surface. FIG. (A) is a partially enlarged plan view of the yarn passing device in the yarn shifting state, and (b) is a view of the yarn shifting guide and the yarn dropping prevention guide of (a) as viewed from the upper side of the drawing in a direction parallel to the drawing. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thread winding device 12 Turret 13 Bobbin holder 14 Traverse device 20 Bobbin 21 Package 30 Thread guide 31 Thread drop prevention guide 40 Thread gripping mechanism 41 Fixed guide 42 Movable part Y Thread

Claims (4)

A plurality of bobbin holders each mounted with a bobbin;
A traverse device that traverses the yarn wound around the bobbin;
A bobbin mounted on a bobbin holder at a yarn winding position winds up a thread to form a fully wound package, and then attaches the bobbin on which the thread is wound from the bobbin formed with the fully wound package to another bobbin holder Switching means for switching to the empty bobbin,
The empty bobbin is configured to be movable in the axial direction, and when the bobbin is switched by the switching means, when the yarn reaches the full package via the empty bobbin, the empty bobbin and the empty bobbin A yarn gathering guide for bringing the yarn between the full winding package to the bunch winding position outside the traverse range by the traverse device in the axial direction;
Thread gripping means for gripping the thread brought to the bunch winding position by the thread gathering guide;
A yarn winding device comprising:   2. The yarn winding device according to claim 1, wherein the yarn gathering guide maintains a yarn gathering state for a predetermined time after the yarn is grasped by the yarn grasping unit. The thread gripping means is
A fixed portion that is immovable in the axial direction with respect to the empty bobbin, and a movable portion that is movable in the axial direction of the empty bobbin with respect to the fixed portion,
When the movable part moves in the axial direction of the empty bobbin with respect to the fixed part, the movable part and the fixed part cooperate to grip the yarn. The yarn winding device according to claim 1 or 2. A thread drop prevention guide for preventing the thread from the empty bobbin from falling from the full winding package when the bobbin is switched by the switching means;
The fixed portion is provided integrally with the yarn drop prevention guide, and the movable portion is provided integrally with the yarn guide.
When the yarn gathering guide moves in the axial direction of the empty bobbin with respect to the yarn dropping prevention guide to bring the yarn closer to the bunch winding position, at the same time, the movable part also moves the empty bobbin against the fixed part. The yarn winding device according to claim 3, wherein the yarn winding device is configured to move in an axial direction so that the movable portion and the fixed portion grip a yarn.

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