JP2015054776A - Bobbin, yarn winding machine, and yarn setting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin that is simply configured and that enables yarn to be easily and reliably set to a bobbin, a yarn winding machine, and a yarn setting method for use in them.SOLUTION: A bobbin 10 is attached to a bobbin holder 22 in a winding part 2 of a yarn winding machine. The bobbin takes up the yarn in a rotating manner while being traversed by a traverse device. A slit 12 for setting the yarn L1, which is guided to a bobbin end surface 11, according to rotation of the bobbin 10 is provided on the bobbin end surface 11.

Description

  The present invention relates to a bobbin for winding a yarn while traversing the yarn, a yarn winder, and a method for hooking the yarn.

  2. Description of the Related Art Conventionally, a yarn winding machine that can switch a winding yarn from a full bobbin to an empty bobbin is known. For example, in a turret type yarn winding machine, two bobbin holders are erected in parallel so as to face each other with the rotation center of the turret disk in between, with one bobbin holder in the winding position and the other bobbin holder in the standby position. The bobbin holder is switched between the standby position and the winding position by rotating the turret board each time the bobbin at the winding position is fully wound. At the time of switching, it is possible to switch the yarn so that the yarn wound around the full bobbin moved to the standby position side is temporarily hooked and the yarn is wound around the empty bobbin moved to the winding position side. It is configured. For such yarn switching, means for once hanging the yarn on the winding position side is required.

  Here, the conventional yarn winding means of the yarn winding machine includes the following. Patent Documents 1 to 3 use a cylindrical bobbin that does not have a thread catching slit, provide a hook-shaped chuck means on the distal end side or the proximal end side of the bobbin holder, and grip the winding thread start end with this chuck means. Is disclosed.

  However, the techniques of Patent Documents 1 to 3 have a problem that the structure of the bobbin holder is complicated and the cost is high because it is necessary to separately provide a saddle type chuck means. In addition, when this chuck means is applied to a multi-cup type yarn winding machine in which a plurality of bobbins are inserted into one bobbin holder and held in series, and a plurality of yarns are simultaneously wound around each bobbin, the bobbin holder The chuck means is required at each of the end portion and the portion between the bobbin and the bobbin. Further, in the case where the yarn is gripped by the mechanism that the chuck means opens and closes, the opening and closing mechanism needs to be built in the bobbin holder, and the structure is extremely complicated. Further, when this chuck means is provided in the portion between the bobbin and the bobbin of the multi-cup type yarn winder, there is a concern that the tail thread may be caught on the chuck means when the full bobbin is removed from the bobbin holder.

  Therefore, in Patent Document 4, a cylindrical bobbin formed with a thread retaining slit extending in the circumferential direction on the outer periphery of the end is held by a bobbin holder, and when the thread is switched, the thread retaining slit on the empty bobbin side is fully wound. There is disclosed a technique for hooking a yarn by biting an intermediate portion of a crossover thread connected to the outer periphery of a bobbin.

Japanese Patent No. 4021895 Japanese Patent No. 2761943 JP 2001-39630 A JP-A-10-273268 JP 2002-96970 A

  However, the technique disclosed in Patent Document 4 has a problem that it is not easy to hook the yarn on the yarn hooking slit. In addition, the yarn that bites into the yarn hooking slit at the time of the yarn switching operation becomes the underlay of the yarn that bites into the yarn hooking slit, and it is difficult to unravel the bottom thread of the full bobbin, There was also a problem that the work of cutting the yarn ends was a manual work.

  Further, in order to allow the yarn to bite into the thread retaining slit extending in the circumferential direction, it is necessary to provide the yarn winding machine with a positioning mechanism for positioning the yarn so as to face the thread retaining slit. There was also a problem that the configuration of the machine was complicated. Further, since it is necessary to secure a space for winding the tail thread (transfer tail) in the bobbin, there is a problem that the bobbin becomes long (see Patent Document 5).

  The present invention has been made in view of the above-described problems, and has a simple configuration, and can be used for a bobbin, a yarn winder, and a bobbin that can easily and reliably hook a yarn on a bobbin. An object is to provide a method for hooking a yarn.

  In order to achieve the above object, the present invention is introduced to a bobbin end surface of a bobbin that is mounted on a bobbin holder in a winding unit of a yarn winding machine and rotates and winds the yarn while traversing by a traverse device. The bobbin end face is provided with a slit for hooking the tanged yarn according to the rotation of the bobbin.

  According to this, simply by guiding the yarn to the end surface of the bobbin, the yarn is hooked on the slit according to the rotation of the bobbin, so that the yarn can be hooked on the bobbin easily and reliably. In addition, since only the slit is provided on the end surface of the bobbin, the bobbin can be simplified.

  Moreover, it is preferable that the said slit is inclined and provided in the reverse direction with respect to the rotation direction of a bobbin. According to this, since the moving direction of the slit with respect to the yarn is opposite to the inclination direction of the slit, the yarn can be easily and reliably hooked by the bobbin.

  The slit preferably has an angle θ with respect to the end surface of the bobbin of 3 ° ≦ θ <90 °. According to this, the yarn can be easily and reliably hooked by the bobbin.

  In addition, the slit includes a yarn guide portion for entering and guiding the yarn guided to the end surface of the bobbin, and a yarn hooking portion provided at the bottom of the yarn guide portion for hooking the yarn. It is preferable. At this time, the slit includes an upstream side portion where the yarn guide portion is located upstream with respect to the bobbin rotation direction and a downstream side portion located downstream with respect to the bobbin rotation direction. It is good to form in V shape. According to this, since the yarn guide for guiding the yarn by entering is provided, the yarn can be easily and reliably hooked by the bobbin.

  Moreover, it is preferable that the angle θ1 of the thread hooking portion with respect to the bobbin end surface of the slit is 3 ° ≦ θ1 <90 °. The slit has an angle θ2 between the upstream side portion of the yarn guide portion and the yarn hooking portion of 0 ° ≦ θ3 <90 °, and the upstream side portion of the yarn guide portion with respect to the bobbin end surface. The angle θ3 is preferably 0 ° <θ3 <90 °. According to these angles θ1 to θ3, the yarn can be easily and reliably hooked by the bobbin.

  Further, the slit may be formed in a curved shape in which an angle formed with the yarn hooking portion decreases as an upstream side portion of the yarn guide portion moves toward the yarn hooking portion. According to this, since the drag applied to the yarn can be gradually reduced as the yarn enters, the yarn can be smoothly guided to the yarn hooking portion.

  Moreover, the present invention is a yarn winding machine equipped with the bobbin. According to this, the yarn can be easily and reliably hooked on the bobbin with a simple configuration.

  The yarn winding machine may further include a cutter device for cutting the yarn in the vicinity of the winding unit. According to this, the yarn can be cut by the cutter device, and the switching from the full bobbin to the empty bobbin can be quickly completed particularly in the turret type yarn winding machine.

  Further, the present invention is a method for hooking a yarn performed by the yarn winding machine, wherein after the yarn is guided to the bobbin end surface by a traverse device, the yarn is moved on the bobbin end surface according to the rotation of the bobbin. The yarn is slid, and the yarn enters the slit that has reached the position of the yarn by rotation of the bobbin, and is hooked. According to this, the yarn can be easily and reliably hooked on the bobbin with a simple configuration.

  Further, the present invention is characterized in that after the yarn is hooked on the slit, the yarn rotating according to the rotation of the bobbin is cut by a cutter device in the vicinity of the winding portion. According to this, the yarn can be cut with the cutter device without stopping the rotation of the bobbin, and in particular, in the turret type yarn winding machine, the switching from the full bobbin to the empty bobbin can be completed quickly. Can do.

  In addition, the present invention is such that after the yarn is hooked to the slit, the yarn is wound once or a plurality of times around the bobbin holder exposed to the outside in the axial direction of the bobbin according to the rotation of the bobbin holder, and then the yarn is wound by the traverse device. It is returned to the bobbin and wound around the bobbin while traversing the yarn according to the rotation of the bobbin. According to this, when winding the yarn around the bobbin, the yarn is wound around the bobbin holder exposed to the outside in the axial direction of the bobbin one or more times according to the rotation of the bobbin holder. The bobbin bottom thread is not stepped on the bobbin thread. Therefore, when removing the full bobbin from the bobbin holder, the tail thread does not get tangled, and it is pulled by the full bobbin that slides in the axial direction of the bobbin holder, and the tail thread can be easily pulled out from the bobbin slit. Can do. For this reason, in addition to easy removal of the full bobbin, there is no possibility that the yarn is worn, and the quality of the yarn is improved.

  According to the present invention, the yarn can be hooked on the slit according to the rotation of the bobbin simply by guiding the yarn to the end surface of the bobbin, so that the yarn can be easily and reliably hooked on the bobbin. The work efficiency of winding in is improved. In addition, since only the slit is provided on the end surface of the bobbin, the bobbin can have a simple configuration, and the bobbin and the yarn winding machine can be manufactured at low cost.

It is a perspective view which shows the whole structure of a yarn winding machine. It is a bottom view of the winding part of a yarn winding machine. It is a side view of the winding part of a yarn winding machine. It is a principal part enlarged view of the slit part of a bobbin. It is a side view which shows the yarn switching operation | movement in a yarn winding machine. It is a figure which shows operation | movement of the thread | yarn latched by the slit of a bobbin. It is a principal part enlarged view which shows the state by which the thread | yarn was wound around the bobbin holder. It is a principal part enlarged view which shows the other modification of the slit of a bobbin.

  Next, an embodiment of a yarn winding machine 100 according to the present invention will be described with reference to the drawings.

  The yarn winding machine 100 according to the present embodiment is a turret type yarn winding machine as shown in FIG. 1, and includes a casing 1 for housing various components as a main body. On the front side, a winding unit 2 having a bobbin holder 22 for winding the yarn, a traverse device 3 for traversing with a predetermined traverse width parallel to the axis of the bobbin holder 22, and a yarn to be fed A tension device 4 for applying tension, a cutter device 5 for cutting a yarn wound around the outer periphery of a full bobbin, a doffing device 6 for exchanging a full bobbin, and a yarn winder An operation panel 7 for operating 100 is disposed.

  The winding unit 2 includes a turret board 21 that is rotatably supported around a horizontal axis on the front surface of the housing 1, a pair of bobbin holders 22 that are cantilevered and supported by the turret board 21, and a pair of bobbin holders 22. A color holder 23, a bobbin 10 held by the bobbin holder 22, and an end face drop prevention collar 24 held by the color holder 23 are provided.

  The turret board 21 is provided on the front surface of the housing 1 and has a substantially horizontal rotation shaft. The turret board 21 has a winding position where the bobbin holder 22 is opposed to and close to the traverse device 3 and a standby position for doffing symmetrical to the winding position. The conversion is sequentially performed between them.

  The bobbin holder 22 is supported by the turret board 21 so as to protrude in the horizontal direction, and is provided so as to be able to rotate about the protruding direction as a rotation axis. The bobbin holder 22 sequentially converts and shifts between a winding position facing and close to the traverse device 3 by the rotation of the turret board 21 and a standby position for symmetric duffing. The package P is formed on the bobbin 10 held by the traversing operation of the yarn by the traverse in the axial direction of the traverse portion 32 and the shaft rotation of the bobbin holder 22. The package P is a package in which a thread is wound around the bobbin 10.

  As shown in FIG. 2, the bobbin 10 is a cylindrical paper or synthetic resin holder attached to the bobbin holder 22. In this embodiment, after the two bobbins 10 and 10 are mounted in series on the bobbin holder 22, the bobbin holder 22 rotates around the axis, and the yarns L <b> 1 and L <b> 2 are wound around each bobbin 10 according to the rotation. . The bobbin 10 is provided with a slit 12 on one end surface 11 of the bobbin. As will be described later, the yarns L1 and L2 guided to the end surface 11 by the traverse device 3 enter the slit 12 as the bobbin 10 rotates. It is supposed to be hung.

  As shown in FIG. 4, the slit 12 is provided so as to be inclined in the opposite direction with respect to the rotational direction (the direction of the arrow in FIG. 4) in the side view of the bobbin. The angle θ of the slit 12 with respect to the bobbin end surface 11 is 3 ° ≦ θ <90 °, and θ is 5 ° ≦ θ ≦ 60 °, and further 5 ° ≦ 5, in order to securely hook the yarn on the slit 12. It is preferable that θ ≦ 30 °.

  In addition, the slit 12 is provided at the bottom of the yarn guide portion 121 to guide the yarn guided to the bobbin end surface 11 by the traverse device 3 and to guide the yarn. A thread retaining portion 122. In the present embodiment, the entire length of the slit 12 is 65 mm along the inclination direction (θ).

  The yarn guide portion 121 has a function of causing the yarn L1 to enter inside thereof and guiding the yarn L1 to the yarn hooking portion 122. The thread guide portion 121 is formed by notching the end surfaces of the bobbins 10 and 10 in the axial direction, and includes an upstream side portion 121a positioned upstream with respect to the bobbin rotation direction in a side view, It is formed in a V shape including a downstream side portion 121b positioned on the downstream side with respect to the rotation direction. In order to make it easier for the yarn to enter, the opening width in the rotational direction of the yarn guide portion 121 is preferably formed to 20 to 100 mm.

  Further, the thread guide portion 121 is notched across the entire thickness direction of the cylindrical bobbin 10 (from the outer peripheral surface to the inner peripheral surface). That is, the ring-shaped bobbin end surface 11 is cut out between the upstream side portion 121a and the downstream side portion 121b. The upstream side portion 121a is a straight side having an angle θ3 with respect to the bobbin end surface 11 of 0 ° <θ3 <90 °, and θ3 is 15 ° ≦ θ3 ≦ 70 ° in order to reliably guide the yarn L1. Furthermore, it is preferable that 30 ° ≦ θ3 ≦ 50 °. On the other hand, the downstream side portion 121b is a linear side whose angle θ4 with respect to the bobbin end surface 11 is 0 ° <θ4 <90 °, and θ4 is 3 ° ≦ θ4 ≦ in order to reliably guide the yarn L1. It is preferable that 60 °, more preferably 5 ° ≦ θ4 ≦ 30 °.

  The yarn hooking portion 122 has a function of pinching and hooking the yarn L1. The yarn hooking portion 122 is formed by cutting the bobbin from the bottom of the yarn guide portion 121 to the inside of the bobbin 10 in the axial direction. In order to securely hang the yarn, it is preferable that the entire length of the yarn hooking portion 122 is 5 to 30 mm.

  Further, the thread retaining portion 122 is cut over the entire thickness direction (from the outer peripheral surface to the inner peripheral surface) of the cylindrical bobbin 10. The yarn hooking portion 122 is formed in a state in which the notches are in close contact so that the yarn L1 can be securely clamped. Moreover, it is preferable that the angle θ1 with respect to the bobbin end surface 11 of the yarn hooking portion 122 is 3 ° ≦ θ1 <90 °. The angle θ2 formed by the upstream side portion 121a of the yarn guide portion 121 and the yarn hooking portion 122 is 0 ° ≦ θ2 <90 °, and 5 ° ≦ θ2 ≦ 70 °, and further 5 ° ≦ θ2 ≦ 50 °. Is preferred.

  The collar holder 23 is provided at an intermediate position in the circumferential direction of the turret board 21 in the two bobbin holders 22 and prevents the yarns L1 and L2 wound around the bobbin 10 from being traversed from falling from the end surface of the bobbin 10. The end face drop prevention collar 24 is supported.

  The traverse device 3 includes a contact pressure roller 31 for contacting the bobbin 10, a first traverse portion 32 a and a second traverse portion 32 b for winding the yarns L 1 and L 2 (hereinafter, two are collectively referred to as “traverse portion”). 32 ”) and a cam box 33 that supports the contact roller 31 and the traverse portion 32.

  The cam box 33 is formed in a substantially rectangular parallelepiped shape and is arranged in parallel with the bobbin holder 22. The cam box 33 rotatably supports the contact roller 31 and holds a cam mechanism for the traverse portion 32 to traverse each of the yarns L1 and L2. The cam box 33 has substantially the same length as the length from the proximal end to the distal end of the bobbin holder 22.

  The traverse portion 32 is provided on the upper side of the cam box 33 and on the bobbin holder 22 side. The traverse portion 32 includes a first traverse portion 32a configured to reciprocate between an intermediate portion and a distal end portion in the longitudinal direction of the cam box 33, and an intermediate portion and a proximal end portion in the longitudinal direction of the cam box 33. And a second traverse portion 32b configured to reciprocate between them.

  The first traverse part 32a conveys the conveyed yarn L1 while being in contact with the cam mechanism held by the cam box 33, and traverses so that the bobbin 10 is evenly wound by reciprocating motion. 1st package P is formed. Similarly, the second traverse portion 32b conveys the yarn L2 while being in contact with it, and reciprocates on the proximal end side of the cam box 33 so that the bobbin 10 can be wound evenly. To form the second package P. Therefore, in one bobbin holder 22, it is possible to perform winding by arranging the packages P of the plurality of yarns L1 and L2 in series. Note that the reciprocating motion of the traverse portion 32 by the cam mechanism is linked to the rotational motion of the bobbin holder 22.

  The contact pressure roller 31 is a roller member that is disposed on the winding portion side of the cam box 33 and below the traverse portion 32 and has a rotation shaft in the longitudinal direction of the cam box 33. The contact roller 31 is provided in parallel to the bobbin holder 22 and is configured to cover substantially the entire longitudinal direction of the cam box 33. Thereby, the contact pressure roller 31 can simultaneously contact and pressure both packages P formed on the bobbin 10.

  The tension device 4 applies tension necessary for winding to the yarns L1 and L2. The tension device 4 includes a dancer arm. When the cam box 33 is gently rotated in a direction away from the rotation axis of the bobbin holder 22 as the diameter of the package P increases, the current of the potentiometer provided on the rotation axis is increased. The value changes, and the dancer arm is raised according to this current value. This gradually reduces the tension and prevents the bulge phenomenon of the package P.

  The cutter device 5 is a device that cuts the bottom thread of the full bobbin, and is provided below the traverse device 3. The cutter device 5 includes two arm portions 51 whose base ends are supported by an axis parallel to the rotation axis of the bobbin holder 22, a horizontal beam 52 that connects the two arm portions 51, and each arm portion 51. A cutter holding portion 53 provided at the tip to extend perpendicularly from the arm portion 51 toward the winding portion 2 side, and a cutter portion 54 extending from the tip of each cutter holding portion 53 in parallel with the axial direction of the bobbin holder. I have. At the time of winding, the arm portion 51 is lowered, and the arm portion 51 is rotated at the time of cutting the yarn, so that the cutter portion 54 is positioned near the upper side of the yarns L1 and L2 (hereinafter referred to as “yarn cutting position”). Raise to. The cutter unit 54 cuts the yarns L1 and L2 that are sandwiched between the slits 12 and lifted as the bobbin rotates.

  The doffing device 6 includes a cylinder that can expand and contract in the front direction of the housing 1. The operator manually extends the cylinder toward the front surface of the housing 1 to push out the full bobbin and remove it from the yarn winding machine 100.

  Next, an example of the operation of the yarn winding machine 100 will be described with reference to FIGS. In the following description, the description will be made paying attention to the fact that the yarn L1 is wound around the bobbin 10.

  When the bobbin 10 at the winding position becomes a full bobbin (see FIG. 5A), the traverse device 3 is retracted to the standby position, and the turret board 21 starts to rotate (see FIG. 5B). When the full bobbin reaches the standby position, a position detection sensor (not shown) provided outside the turret board 21 detects the rotational position of the turret board 21, and the turret board 21 stops and the empty bobbin stops. 10 reaches the winding position, and the traverse device 3 returns to the winding position (see FIG. 5C).

  Next, when the traverse unit 32 of the traverse device 3 enters the detection area of the sensor 8 provided at the tip of the cam box 33, the cam mechanism inside the cam box 33 is shifted to the back side of the bobbin holder 22 by an unillustrated air cylinder. Simultaneously with the movement, the cutter device 5 starts to rise, and the cutter unit 54 rises to the yarn cutting position (see FIG. 5D).

  At this time, the yarn L1 is guided to the bobbin end surface 11 by the traverse portion 32 shifted to the back side of the bobbin holder 22 (see FIG. 6A), and is positioned on the near side with respect to the traverse portion 32 and the traverse portion 32. It contacts the bobbin end face 11 while forming a twill angle with the end face fall prevention collar 24.

  The yarn in contact with the bobbin end surface 11 slides on the bobbin end surface 11 as the bobbin 10 rotates, and after the slit 12 reaches the position of the yarn L1 by the rotation of the bobbin 10, the bobbin end surface 11 Enters the yarn guide part 121 composed of the upstream side part 121a and the downstream side part 121b (see FIG. 6B).

  The yarn L1 that has entered the yarn guide portion 121 is guided toward the inside in the axial direction of the bobbin 10 between the upstream side portion 121a and the downstream side portion 121b as the bobbin 10 rotates (FIG. 6 ( c)).

  Then, the yarn L1 is guided to the yarn hooking portion 122 provided at the bottom of the yarn guide portion 121, then enters the yarn hooking portion 122 as it is, and is held by the yarn hooking portion 122. It is latched (see FIG. 6 (d)).

  Next, when the yarn L1 is hooked on the yarn hooking portion 122, a portion extending from the end surface drop prevention collar 24 to the yarn hooking portion 122 is rotated by the bobbin holder 22 (FIG. 3). (Rotation around the counterclockwise in FIG. 5), the thread is lifted up to the thread cutting position and hits the cutter portion 54 to be cut (see FIG. 5E).

  Next, the cutter unit 54 is lowered to the standby position, and the yarn L1 moves outward in the axial direction of the bobbin 10 as the traverse unit 32 shifted to the back side of the bobbin holder 22 further moves in the back side direction. The bobbin holder 22 is guided onto the exposed bobbin holder 22 and wound around the bobbin holder 22 one or more times as the bobbin holder 22 rotates. The number of windings around the bobbin holder 22 is preferably 3 times or less in consideration of ease of pulling out the tail thread as will be described later.

  Next, the traverse unit 32 returns to the normal traverse position. Along with this, the yarn L1 that has fallen from the bobbin end surface 11 and wound around the peripheral surface of the bobbin holder 22 once or a plurality of times is led to the traverse part 32 and rides on the bobbin 10 again. It is wound around the bobbin 10 according to the rotation of 10.

  When winding the yarn around the bobbin 10 in this way, for example, as shown in FIG. 7, if the yarn is wound once or a plurality of times around the bobbin holder 22 exposed to the outside in the axial direction of the bobbin 10 as the bobbin holder 22 rotates. The winding start portions of the yarns L1 and L2, that is, the tail yarn of the full bobbin 10 is not stepped on the yarn on the bobbin 10. Therefore, when the full bobbin 10 is removed from the bobbin holder 22, the tail thread does not get tangled and is pulled by the full bobbin 10 that is slid in the axial direction of the bobbin holder 22. It can be easily pulled out from the slit 12. For this reason, in addition to the easy removal of the full bobbin 10, there is no possibility that the yarns L1, L2 are worn, and the quality of the yarn is improved.

  The fully-wound bobbin moved to the standby position is pushed out of the bobbin holder 22 by manually operating the cylinder of the doffing device 6 after the bobbin holder 22 stops rotating, and then replaced with an empty bobbin 10. .

  In the above embodiment, the bobbin has a cylindrical shape, but is not limited thereto. For example, a triangular cylindrical shape, a square cylindrical shape, a hexagonal cylindrical shape, an octagonal cylindrical shape, or the like may be used.

  Moreover, although the slit 12 was provided in one bobbin end surface 11, you may provide in both the bobbin end surfaces 11. FIG.

  Moreover, although the slit 12 was formed so that it might incline in the reverse direction with respect to the rotation direction of the bobbin 10, you may form it so that it may incline in the orthogonal or forward direction with respect to the rotation direction.

  Moreover, although the slit 12 was formed in the state which closely_contact | adhered the notch of the thread | yarn latching part 122, you may provide a clearance gap in a notch. However, in order to securely hook the yarn, it is preferable to form the cutout width to be smaller than the diameter of the yarn.

  Further, when winding the yarn around the bobbin, the yarn is wound once or a plurality of times around the bobbin holder 22 exposed to the outside in the axial direction of the bobbin 10 as the bobbin holder 22 rotates. After the yarn is hooked, the yarn may be wound around the bobbin 10 while traversing the yarn.

  Moreover, the slit 12 is not limited to the above-mentioned thing. For example, in the slit 12, the upstream side portion 121 a and the yarn hooking portion 122 may be flush with each other, or as shown in FIG. It may be the same surface. In addition, as shown in FIG. 7B, the slit 12 is a curve in which the angle formed between the upstream side portion 121 a and the downstream side portion 121 b toward the yarn hooking portion 122 decreases sharply as it goes to the yarn hooking portion 122. It may be formed in a shape. Further, as shown in FIG. 7C, the slit 12 may be provided with a yarn hooking portion 122 starting from the bobbin end surface 11 without being provided with the yarn guiding portion 121.

  Further, although the plurality of bobbins 10 are mounted in series on one bobbin holder 22, one bobbin 10 may be mounted on one bobbin holder 22.

  Further, although the bobbin 10 is applied to a turret type yarn winding machine, the bobbin 10 may be applied to other yarn winding machines.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

DESCRIPTION OF SYMBOLS 10 ... Bobbin 11 ... Bobbin end surface 12 ... Slit 121 ... Yarn guide part 121a ... Upstream side part 121b ... Downstream side part 122 ... Yarn latching part 2 ... Winding part 22 ... Bobbin holder 3 ... Traverse device 100 ... Yarn winding Lapping machine L1, L2 ... Yarn

Claims (13)

In a bobbin that is mounted on a bobbin holder in a winding unit of a yarn winding machine and rotates and winds the yarn while traversing by a traverse device,
A bobbin characterized in that a slit is provided on the bobbin end surface for latching the yarn guided to the bobbin end surface according to the rotation of the bobbin.   The bobbin according to claim 1, wherein the slit is provided to be inclined in a direction opposite to a rotation direction of the bobbin.   The bobbin according to claim 1, wherein the slit has an angle θ with respect to the bobbin end surface of 3 ° ≦ θ <90 °.   The slit includes a yarn guide portion for guiding and guiding a yarn guided to an end surface of the bobbin, and a yarn hooking portion provided at a bottom portion of the yarn guide portion for hooking the yarn. The bobbin according to any one of claims 1 to 3.   The slit has a V-shape including an upstream side portion where the thread guide portion is located upstream with respect to the bobbin rotation direction and a downstream side portion located downstream with respect to the bobbin rotation direction. The bobbin according to claim 4 formed.   The bobbin according to claim 5, wherein the slit has an angle θ <b> 1 with respect to a bobbin end surface of the yarn hooking portion of 3 ° ≦ θ1 <90 °.   The slit has an angle θ2 between the upstream side portion of the yarn guide portion and the yarn hooking portion of 0 ° ≦ θ2 <90 °, and an angle θ3 of the upstream side portion of the yarn guide portion with respect to the bobbin end surface. The bobbin according to claim 6, wherein 0 ° <θ3 <90 °.   8. The slit according to any one of claims 5 to 7, wherein the slit is formed in a curved shape in which an angle formed with the yarn hooking portion gradually decreases as an upstream side portion of the yarn guide portion moves toward the yarn hooking portion. The bobbin according to crab.   A yarn winder equipped with the bobbin according to any one of claims 1 to 8.   The yarn winding machine according to claim 9, further comprising a cutter device for cutting the yarn in the vicinity of the winding unit. A yarn hooking method performed by the yarn winder according to claim 9 or 10,
After the yarn is guided to the end surface of the bobbin by the traverse device, the yarn is slid on the end surface of the bobbin according to the rotation of the bobbin, and the yarn enters the slit that has reached the position of the yarn by the rotation of the bobbin. A method for hanging a yarn, characterized by hanging.   The method for hooking a yarn according to claim 12, wherein after the yarn is hooked on the slit of the bobbin, the yarn rotating according to the rotation of the bobbin is cut by a cutter device in the vicinity of the winding portion.   After the yarn is hooked on the slit of the bobbin, the yarn is wound around the bobbin holder exposed to the outside in the axial direction of the bobbin one or more times according to the rotation of the bobbin holder, and then the yarn is wound by the traverse device. The method for hooking a yarn according to claim 11 or 12, wherein the yarn is wound on the bobbin while returning to the bobbin and traversing the yarn according to the rotation of the bobbin.