JP2024007744A - Spinning machine, package forming method and package - Google Patents

Abstract

To provide a spinning machine capable of forming bunch winding hardly untied, a forming method of a package and the package.SOLUTION: A spinning machine 1 comprises: bunch winding means 100 having an air spinning device 7, a single driving winding drum 22 and a single driving traverse guide 23; a bunch winding control device 91 which, while rotating a bobbin B by the winding drum 22, controls, by moving the traverse guide 23 in the axial direction of the bobbin B, to form a bunch winding X to an end part region Ba by winding yarn Y to the end part region Ba of the bobbin B positioned outside a package forming region A2; and loosening preventing means preventing looseness of the yarn Y while forming the bunch winding.SELECTED DRAWING: Figure 3

Description

The present invention relates to a spinning machine, a method for forming a package, and a package.

When winding yarn around an empty bobbin to form a package, a bunch winding is formed at the beginning of the winding. Regarding the yarn winding technique at the beginning of winding, a technique is known in which the yarn is traversed with a yarn guide to form a bunch winding, as described in Patent Document 1, for example. This method discloses that the thread guide is moved quickly when winding the thread in the regular winding direction, and the thread guide is moved slowly when winding the thread in the reverse winding direction.

US Patent No. 6,308,906

Bunch winding of a package is an important part of connecting the package to the next package in the subsequent process. However, defects such as bunch windings unraveling or disappearing before the package is fully wound in the yarn winding machine may result in defective packages. The causes include, for example, vibration of the package that occurs during winding of the package, or a portion of the bunch winding being sucked into the suction mouth during yarn splicing.

An object of the present invention is to provide a spinning machine, a method for forming a package, and a package that can form a bunch winding that is difficult to unravel.

A spinning machine according to one aspect of the present invention includes a spinning device that generates yarn by spinning a fiber bundle, a bunch winding forming means that includes an independently driven drum, an independently driven yarn guide member, and a drum. By moving the thread guide member in the axial direction of the bobbin while rotating the bobbin, the thread is wound around the end region of the bobbin located outside the package forming region to form a bunch winding in the end region. and a loosening prevention means for preventing the yarn from loosening during bunch winding.

According to this spinning machine, bunch winding is formed by moving the yarn guide member in the axial direction of the bobbin using the control device. Therefore, the threads overlap more reliably than in the conventional winding state (stick winding, etc.) that does not involve controlling the position of the threads. The loosening prevention means prevents the thread from loosening, so that the thread can be reliably wound around the bobbin. This forms a bunch winding that is difficult to unravel.

The spinning machine may include a yarn storage roller that stores yarn from the spinning device by winding it around the outer circumferential surface as a slack prevention means. The yarn accumulating roller can reliably prevent the yarn from becoming loose.

Bunch winding may be formed using yarn stored in advance in a yarn storage roller. For example, when an operator manually attaches a bobbin, bunch winding can be easily formed.

The spinning machine may include, as a slack prevention means, a spinning speed adjustment section that makes the spinning speed during bunch winding formation in the spinning device lower than the spinning speed during normal spinning. In recent years, the spinning speed of spinning machines has tended to increase. Even in such a case, sufficient time can be secured for bunch winding formation. As a result, overlapping yarn winding is reliably realized in bunch winding.

The spinning machine may be provided with a winding speed adjustment section that makes the winding speed during bunch winding higher than the winding speed during main winding, as a slack prevention means. In recent years, the spinning speed of spinning machines has tended to increase. Even in such a case, sufficient time can be secured for bunch winding formation. As a result, overlapping yarn winding is reliably realized. The winding speed during main winding includes a speed component in the axial direction of the bobbin (traverse speed) in addition to a speed component in the rotational direction of the bobbin, but during bunch winding, the speed component in the axial direction is small, so By increasing the winding speed during winding, yarn slack does not occur during bunch winding.

The control device may perform control to form a bunch winding using yarn stored in advance in the yarn storage roller until the remaining amount of yarn in the yarn storage roller reaches a predetermined amount. In this case, bunch winding can be completed with the yarn connected between the yarn storage roller and the package. As a result, for example, yarn splicing can be performed without pulling out the yarn from the package, and winding of the yarn can be promptly started.

The spinning machine includes a plurality of spinning units, and each of the plurality of spinning units includes a spinning device, a drum included in a bunch winding forming means, a drum drive unit that independently drives the drum, and a yarn guide member. It may have a certain traverse guide and a traverse drive unit that independently drives the traverse guide. In this case, a bunch winding that is difficult to unravel is formed in each spinning unit. Further, it is possible to omit providing a dedicated device for forming bunch winding on the spinning machine.

The spinning machine includes a cradle arm capable of holding a conical bobbin having a large-diameter end and a small-diameter end, and a control device transfers yarn from a yarn storage roller to the large-diameter end of the bobbin and the cradle arm. Control may be performed such that bunch winding is formed in the end region adjacent to the large-diameter end of the bobbin in a state where the bobbin is sandwiched between the two. In this case, a bunch winding that is difficult to unravel is formed on the conical bobbin.

The control device moves the thread guide member from the outer end of the end region of the bobbin to a position proximate to the package forming region before or during bunch winding formation, and then moves the thread guide member from the outer end of the end region of the bobbin to a position proximate to the package forming region during bunch winding formation. The thread guide member may also be moved toward. In this case, stronger overlapping yarn winding is achieved in bunch winding.

The control device changes the direction of movement of the thread guide member at least once during bunch winding between a position closer to the outside of the end area of the bobbin and a position closer to the package forming area than the position. Good too. In this case, in bunch winding, overlapping winding of the yarn is reliably realized.

A spinning machine according to another aspect of the present invention includes a spinning device that generates yarn by spinning a fiber bundle, a bunch winding forming means having an independently driven drum, an independently driven yarn guide member, and a spinning device that generates yarn by spinning a fiber bundle. By moving the thread guide member in the axial direction of the bobbin while rotating the bobbin, the thread is wound around an end region of the bobbin located outside the package forming region to form a bunch winding in the end region, and a control device for controlling the yarn to be guided into the package forming region at least once during bunch winding. According to this spinning machine, at least a portion of the bunch-wound yarn is arranged under the yarn layer of the package. Therefore, even if the bunch winding is about to unravel, the bunch winding will not completely unwind (disappear).

Yet another aspect of the present invention may be a method for forming a package in which a spinning device winds a yarn produced by spinning a fiber bundle. This package forming method includes a package forming process in which a bobbin is rotated by an independently driven drum and the yarn is wound around a package forming area to form a package, and a bunch winding forming process is performed before the package forming process. While the bobbin is rotated by a drum, a singly driven yarn guide member is moved in the axial direction of the bobbin, thereby winding the yarn around the end area of the bobbin located outside the package forming area and bunching the yarn around the end area. A bunch winding forming step of forming a winding. In the bunch winding forming step, the yarn is prevented from loosening during bunch winding formation. This package formation method also forms a bunch winding that is difficult to unravel.

Yet another aspect of the present invention may be a package formed on a conically shaped bobbin having a large diameter end and a small diameter end. This package has a bunch winding formed by traversing the yarn in an end region having a predetermined width located between the package forming region and the large-diameter end.

According to some aspects of the present invention, it is possible to form a bunch winding that is difficult to unravel.

FIG. 1 is a front view of a spinning machine according to one embodiment. FIG. 2 is a side view of the spinning unit and doffing truck shown in FIG. 1. FIG. 3 is a block diagram showing the functional configuration of the spinning machine shown in FIG. 1. FIG. 4 is a side view showing the yarn storage device. FIG. 5 is a diagram showing a traverse device. FIGS. 6(a), 6(b), and 6(c) are diagrams showing an example of the winding order of yarn in forming bunch winding. 7(a), FIG. 7(b), and FIG. 7(c) are diagrams showing other examples of the winding order of yarn in forming bunch winding. 8(a), FIG. 8(b), FIG. 8(c), and FIG. 8(d) are diagrams showing still other examples of the winding order of yarn in forming bunch winding. FIG. 9 is a side view illustrating a bunch winding operation by the doffing truck shown in FIG. 1. FIG. FIG. 10 is a diagram showing a bunch winding forming means having a bunch winding roller and a yarn guide member of a doffing truck.

Hereinafter, embodiments will be described in detail with reference to the drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals, and redundant explanations will be omitted. The dimensional proportions in the drawings do not necessarily correspond to those in the description. In the description, words indicating directions such as "top", "bottom", "left", "right", "front", and "back" are words of convenience based on the state shown in the drawings.

As shown in FIGS. 1 and 2, the spinning machine 1 includes a plurality of spinning units 2, a yarn splicing truck 3, a doffing truck 4, a first end frame 5A, a second end frame 5B, and a bobbin. It includes a stocker 50 and a package conveyor 80. The plurality of spinning units 2 are arranged in one direction (the left-right direction in FIG. 1, the longitudinal direction of the spinning machine 1). Each spinning unit 2 generates yarn Y and performs a winding operation to wind the yarn Y onto a bobbin B to form a package P.

The first end frame 5A houses a recovery device for recovering fiber waste, thread waste, etc. generated in the spinning unit 2. The first end frame 5A is arranged at one end in the arrangement direction of the plurality of spinning units 2. The second end frame 5B accommodates an air supply section that adjusts the air pressure of compressed air (air) supplied to the spinning machine 1 and supplies air to each part of the spinning machine 1. The second end frame 5B may house a drive motor or the like for supplying power to each part of the spinning unit 2. The second end frame 5B is arranged at the other end in the arrangement direction of the plurality of spinning units 2.

The second end frame 5B is provided with a machine control device 5C, a display screen 5D, and an input key 5E. The machine control device 5C centrally manages and controls each part of the spinning machine 1. The display screen 5D can display information regarding the settings of the spinning unit 2, and the like. The operator can perform setting work for the spinning unit 2 by performing appropriate operations using the input keys 5E.

As shown in FIG. 2, each spinning unit 2 includes, in order from the upstream side in the running direction of the yarn Y, a draft device 6, an air spinning device (spinning device) 7, a yarn monitoring device 8, and a tension sensor 9. , a yarn storage device 11, a waxing device 12, a traverse device 26, and a winding device 13. The unit controller 10 is provided for each of a predetermined number (one or more) of spinning units 2, and controls the operation of the spinning units 2.

The draft device 6 drafts the sliver S. The air spinning device 7 generates a yarn Y by twisting the fiber bundle F generated by drafting the sliver S by the drafting device 6 using a swirling air flow.

The yarn monitoring device 8 monitors information on the traveling yarn Y between the air spinning device 7 and the yarn storage device 11, and detects the presence or absence of yarn defects based on the monitored information. When the yarn monitoring device 8 detects a yarn defect, it transmits a yarn defect detection signal to the unit controller 10 . The tension sensor 9 measures the tension of the running yarn Y between the air spinning device 7 and the yarn storage device 11 and sends a tension measurement signal to the unit controller 10. When the unit controller 10 determines that there is an abnormality based on the detection result of at least one of the yarn monitoring device 8 and the tension sensor 9, the yarn Y is cut in the spinning unit 2. Specifically, the supply of air to the air spinning device 7 is stopped, the production of the yarn Y is interrupted, and the yarn Y is cut. Alternatively, the thread Y may be cut by a separately provided cutter.

The yarn storage device 11 stores the yarn Y between the air spinning device 7 and the winding device 13. The yarn storage device 11 includes a yarn storage roller 60 (see FIG. 4) that stores the yarn Y by winding the yarn Y around its outer peripheral surface. The yarn storage device 11 has the function of stably drawing out the yarn Y from the air spinning device 7, and retains the yarn Y sent out from the air spinning device 7 during the yarn splicing operation by the yarn splicing cart 3 to prevent the yarn Y from becoming slack. It also has a function of preventing tension fluctuations of the yarn Y on the downstream side of the yarn storage device 11 from being transmitted to the air spinning device 7.

The yarn accumulating device 11 will be described in detail with reference to FIG. 4. As shown in FIG. 4, the yarn storage device 11 includes a yarn storage roller 60, a yarn hooking member 61, an upstream guide 62, a downstream guide 63, a yarn storage amount sensor 64, and an electric motor 65. It is equipped with

The yarn storage roller 60 stores a certain amount of yarn Y by winding it around its outer peripheral surface. The yarn storage roller 60 is rotationally driven by an electric motor 65. The operation of the electric motor 65 is controlled by the unit controller 10. The yarn Y wound around the outer peripheral surface of the yarn accumulating roller 60 is wound so as to tighten the yarn accumulating roller 60 as the yarn accumulating roller 60 rotates, thereby pulling the yarn Y on the upstream side of the yarn accumulating device 11. . That is, by rotating the yarn accumulating roller 60 with the yarn Y wound around its outer peripheral surface at a predetermined rotational speed, the yarn accumulating device 11 applies a predetermined tension to the yarn Y and removes the yarn Y from the air spinning device 7. It is pulled out at a predetermined speed and sent downstream at a predetermined speed.

The thread hooking member 61 is configured to be able to engage (hook) the thread Y. The thread hooking member 61 rotates integrally with the thread accumulating roller 60 while being engaged with the thread Y, thereby winding the thread Y around the outer peripheral surface of the thread accumulating roller 60 . The thread hooking member 61 is provided at the downstream end of the thread storage roller 60 and is rotatable relative to the thread storage roller 60. A magnetic force acts on the thread hooking member 61 to resist relative rotation with respect to the thread storage roller 60. Therefore, when the tension of the yarn Y is not higher than a predetermined value, the thread hooking member 61 rotates integrally with the yarn storage roller 60, and the yarn Y is wound around the yarn storage roller 60 (stored). In a state where a predetermined tension or more is generated in the yarn Y, the yarn hooking member 61 rotates relative to the yarn accumulating roller 60, and the yarn Y is unwound from the yarn accumulating roller 60.

The upstream guide 62 is arranged upstream of the yarn storage roller 60. The upstream guide 62 is a guide member that appropriately guides the yarn Y to the outer circumferential surface of the yarn storage roller 60, and the twist of the yarn Y propagating from the air spinning device 7 is higher than that of the upstream guide 62. It also serves as a stopper to prevent twisting from being transmitted to the downstream side. The downstream guide 63 is arranged downstream of the yarn storage roller 60. The downstream guide 63 is a guide member that guides the yarn Y unwound from the yarn storage roller 60 to the winding device 14.

The yarn storage amount sensor 64 detects the storage amount (state) of the yarn Y stored on the yarn storage roller 60 in a non-contact manner. In this embodiment, the yarn storage amount sensor 64 detects the amount of yarn Y stored in a part of the yarn storage roller 60. The yarn storage amount sensor 64 outputs a binary value (signal) of ON/OFF. The yarn storage amount sensor 64 outputs an ON signal when the yarn Y is detected on the yarn storage roller 60, and outputs an OFF signal when the yarn Y is not detected. The yarn storage amount sensor 64 transmits the detection result to the unit controller 10 (see FIG. 1).

As shown in FIGS. 1 and 2, the waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding device 13.

The traverse device 26 will be described in detail with reference to FIG. 5. As shown in FIG. 5, the traverse device 26 traverses the yarn Y with a predetermined width against the rotating winding bobbin B or package P. The traverse device 26 traverses the yarn Y to be wound into one package P. The traverse device 26 is, for example, a belt-type traverse device. The traverse device 26 includes a traverse drive section 26a, a drive pulley 26b, driven pulleys 26c and 26d, a drive belt 26e, and a traverse guide (thread guide member) 23.

The traverse drive unit 26a is, for example, a stepping motor or a servo motor. The traverse drive section 26a rotationally drives the drive pulley 26b. The operation of the traverse drive section 26a is controlled by the unit controller 10. The drive pulley 26b is rotationally driven in forward and reverse directions by the traverse drive section 26a. The driven pulleys 26c and 26d are provided on both sides of the traverse range. The drive belt 26e is stretched around a drive pulley 26b and driven pulleys 26c and 26d. The traverse guide 23 can guide the yarn Y and is fixed to the drive belt 26e. The traverse guide 23 traverses the yarn Y according to the movement of the drive belt 26e.

In the traverse device 26, the traverse guide 23 fixed to the drive belt 26e is reciprocated in the axial direction of the winding drum 22 by rotating the drive pulley 26b in forward and reverse directions by driving the traverse drive unit 26a. As a result, the traverse guide 23 traverses the yarn Y with a predetermined width with respect to the rotating winding bobbin B or package P. In the traverse device 26, the traverse speed (moving speed of the traverse guide 23) is changed by changing the rotational speed of the traverse drive section 26a.

Returning to FIGS. 1 and 2, the winding device 13 winds the yarn Y onto the bobbin B to form the package P. In the following description, an empty bobbin B on which the thread Y is not wound (unwound) may be referred to as an "empty bobbin B0." In this embodiment, the empty bobbin B0 is configured as a cylinder. When the empty bobbin B0 is viewed from the front, it is formed in a shape that widens from one end toward the other end in the axial direction.

The winding device 13 includes a cradle arm 21, a bobbin holder 28, and a winding drum (drum) 22. The cradle arm 21 is swingably supported by a support shaft 24, and brings the surface (outer peripheral surface) of the bobbin B or the surface of the package P into contact with the surface of the winding drum 22 with appropriate pressure. The bobbin holder 28 is provided on the cradle arm 21 and can hold both ends of the bobbin B. A bobbin B is rotatably attached to the bobbin holder 28. The winding drum 22 contacts the surface of the bobbin B or the surface of the package P attached to the bobbin holder 28 and rotates the bobbin B or package P.

The winding drum 22 is rotationally driven by a drum driving section 27 (see FIG. 5). The drum drive section 27 is, for example, a brushless motor. The drum drive section 27 drives one winding drum 22. That is, the drum driving section 27 rotates one package P. As a result, in each spinning unit 2, the winding bobbin B or package P is independently rotated in the winding direction. The operation of the drum drive section 27 is controlled by the unit controller 10. Each spinning unit 2 is individually provided with a drum driving section 27, so that the rotational drive of the winding drum 22 can be controlled for each spinning unit 2.

As shown in FIG. 5, the spinning unit 2 determines the number of rotations per unit time (hereinafter simply referred to as "rotation number") of the drum driving section 27, that is, the number of rotations per unit time of the winding drum 22 (package P). The rotation sensor 25 detects the rotation speed (hereinafter simply referred to as "rotation speed"). The rotation sensor 25 transmits the detection result to the unit controller 10 (see FIG. 1).

Returning to FIG. 1, the spinning unit 2 (specifically, the unit controller 10) outputs a request signal when the package P becomes full. The spinning unit 2 determines that the package P is fully wound when a specified amount (specified length) of yarn Y is wound onto the bobbin B, and outputs a request signal. Note that the spinning unit 2 may output the request signal a predetermined time before the package P becomes full.

When the yarn Y is cut in a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn splicing cart 3 performs a yarn splicing operation on the spinning unit 2 concerned. The yarn splicing cart 3 travels on the running path R1. The travel path R1 extends along the direction in which the plurality of spinning units 2 are arranged. The yarn splicing cart 3 includes a suction pipe 31, a yarn splicing device 32, and a suction mouth 33. The suction pipe 31 is rotatably supported, captures the yarn Y from the air spinning device 7, and guides it to the yarn splicing device 32. The suction mouth 33 is rotatably supported, captures the yarn Y from the winding device 13, and guides it to the yarn splicing device 32. The yarn splicing device 32 splices the guided yarns Y together. The yarn splicing device 32 is a splicer that uses compressed air, a peacer that passes the yarn Y from the package P through the air spinning device 7, a knotter that splices the yarn Y mechanically, or the like.

When the yarn splicing cart 3 performs the yarn splicing operation, the package P is rotated in the anti-winding direction (reverse rotation). At this time, the cradle arm 21 is moved by an air cylinder (not shown) so that the package P is separated from the winding drum 22, and the package P is moved by a reverse rotation roller (not shown) provided on the yarn splicing cart 3. It can be rotated backwards. Alternatively, the reverse rotation roller of the yarn splicing cart 3 may be omitted, and the package P may be reversely rotated by the winding drum 22 of each spinning unit 2.

The doffing truck 4 is a work truck that is movably provided with respect to the plurality of spinning units 2. The doffing cart 4 performs a discharging process for discharging the bobbin B or package P that has already been attached in the spinning unit 2 from the spinning unit 2, and a discharging process for discharging the bobbin B or package P that has already been attached in the spinning unit 2. ), a bobbin set process is performed in which an empty bobbin B0 is supplied from the magazine 41, which will be described later, and the yarn Y is started to be wound (details will be described later).

For example, when the package P is fully wound in the first spinning unit 2, the doffing cart 4 runs on the running path R2 to the first spinning unit 2, stops, and discharges the package P according to a control signal from the machine control device 5C. Perform processing and bobbin set processing. The travel path R2 extends along the arrangement direction of the plurality of spinning units 2 (parallel to the travel path R1).

The bobbin stocker 50 is arranged at one end in the arrangement direction of the plurality of spinning units 2 (the end where the first end frame 5A is arranged). The bobbin stocker 50 stores a plurality of empty bobbins B0, and also takes out a part of the stored empty bobbins B0 and supplies it to the doffing truck 4 by a delivery mechanism 70. A supply position SP is provided on the front side of the bobbin stocker 50, where the doffing cart 4 receives the bobbin B from the bobbin stocker 50. The doffing truck 4 can travel on the travel path R2 and stop at the supply position SP at an appropriate timing when the number of empty bobbins B0 stored in the magazine 41 is not a full number. After receiving the bobbin B at the supply position SP, the doffing cart 4 moves to the spinning unit 2 that requests the bobbin B. If there is no spinning unit 2 requesting the bobbin B, the doffing cart 4 waits at an appropriate position.

The doffing truck 4 includes a housing 40, a magazine 41, a bobbin mounting mechanism 42, a cradle operating arm 43, a suction pipe 44, and a control section 46. The magazine 41, the bobbin mounting mechanism 42, the cradle operating arm 43, the suction pipe 44, and the control section 46 are housed in the housing 40.

The magazine 41 stores the bobbins B supplied from the bobbin stocker 50. The magazine 41 stores a plurality of bobbins B. A supply mechanism 47 that supplies the empty bobbin B0 to the bobbin mounting mechanism 42 is provided at the lower end of the magazine 41. The supply mechanism 47 includes a shutter, an air cylinder, and the like. The supply mechanism 47 supplies the empty bobbins B0 one by one to the bobbin mounting mechanism 42. The operation of the supply mechanism 47 is controlled by the control section 46.

The bobbin mounting mechanism 42 is a device that grips and moves the empty bobbin B0. The bobbin mounting mechanism 42 is configured to be swingable about the swing shaft 111, and is configured to be able to grip the empty bobbin B0 with the bobbin gripping portion 52. The bobbin mounting mechanism 42 is capable of moving the empty bobbin B0 from the supply mechanism 47 to a position between the bobbin holders 28. After moving the empty bobbin B0 to the bobbin holder 28, the bobbin mounting mechanism 42 returns to the original position. The bobbin mounting mechanism 42 may be configured to be able to move the empty bobbin B0 from a position between the bobbin holders 28 to a predetermined position (for example, the origin position of the bobbin mounting mechanism 42).

The bobbin mounting mechanism 42 includes a bunch winding roller 53 for performing bunch winding (see FIG. 9). Note that when the bobbin mounting mechanism 42 performs bunch winding without the bunch winding roller 53, the empty bobbin B0 may be rotated by the winding drum 22 of the spinning unit 2.

As shown in FIG. 5, the bobbin B has, for example, a conical shape. The bobbin B includes a large diameter end Bc and a small diameter end Bb at both ends in the axial direction. In this embodiment, a bunch winding region A1 is set in the large diameter end region Ba near the large diameter end Bc, and a package forming region A2 is set between the bunch winding region A1 and the small diameter end Bb. It is set. The bunch winding region A1 has a predetermined width in the axial direction. Bunch winding refers to winding the yarn Y several times (for example, about 5 times) around the empty bobbin B0 (specifically, the bunch winding region A1) outside the package forming region A2 (see FIG. 5). . The bunch winding X is formed in an area separate from the package P, and is usually connected by only one thread Y. By forming the bunch winding, the beginning of the winding of the yarn Y can also be pulled out from the completed package P in the subsequent process. When forming bunch winding using the winding device 13 of the spinning unit 2, the empty bobbin B0 is rotated by the winding drum 22 with the traverse guide 23 positioned in the bunch winding area A1.

The cradle operating arm 43 is an arm that operates the cradle arm 21. The cradle operating arm 43 operates the cradle arm 21 to open the bobbin holder 28 (separating one bobbin holder 28 from the other bobbin holder 28) in order to remove the package P or the empty bobbin B0 from the winding device 13. The cradle operating arm 43 operates the cradle arm 21 to mount the empty bobbin B0 between the bobbin holders 28, and closes the bobbin holders 28 (brings one bobbin holder 28 close to the other bobbin holder 28). The suction pipe 44 is a device that captures and guides the yarn Y. The suction pipe 44 captures the yarn Y sent out from the air spinning device 7 by suctioning it with a suction section, and guides the captured yarn Y to the empty bobbin B0.

The package conveyor 80 is a conveyance device that conveys the packages P discharged from the spinning unit 2 by the doffing truck 4. The package conveyor 80 is provided between the spinning unit 2 and the doffing truck 4. The doffing truck 4 may be provided with a passage space for the packages P, and a running path R2 for the doffing truck 4 may be provided between the spinning unit 2 and the package conveyor 80. The package conveyor 80 extends along the direction in which the plurality of spinning units 2 are arranged. The direction in which the packages P are conveyed by the package conveyor 80 is perpendicular to the direction in which the packages P are discharged from the spinning unit 2 (orthogonal to each other). The package conveyor 80 is a conveyor belt whose endless belt is driven by a drive roller (not shown).

Next, a spinning method carried out in each spinning unit 2 of the spinning machine 1 will be explained. The spinning method includes forming a bunch winding on bobbin B. In the example described below, bunch winding is formed by the winding drum 22 of the spinning unit 2. As shown in FIG. 3, the spinning machine 1 includes an air spinning device 7, a bunch winding forming means 100 having an independently driven winding drum 22 and an independently driven traverse guide 23, and a winding drum 22 that allows a bobbin B to be By moving the traverse guide 23 in the axial direction of the bobbin B while rotating the A bunch winding control device (control device) 91 that controls the winding of the yarn Y around the side end region Ba) to form a bunch winding X in the end region Ba, and a bunch winding control device (control device) 91 that controls the winding of the yarn Y around the side end region Ba) to form a bunch winding X in the end region Ba; and a loosening prevention means for preventing. In this embodiment, "single drive" refers to one drive unit driving only one target object. Further, in this embodiment, the traverse guide 23 moves within a bunch winding region A1 of 1 mm or more and 5 mm or less.

The spinning machine 1 includes a cradle arm 21 that holds a conical bobbin B. In the spinning machine 1, a bunch winding X is formed in the large-diameter end region Ba of the bobbin B with the yarn Y from the yarn storage roller 60 being sandwiched between the large-diameter end Bc and the cradle arm 21. Ru. The thread Y is sandwiched between the large-diameter end Bc of the bobbin B and a bobbin holder 28 provided on the cradle arm 21.

As shown in FIG. 3, each spinning unit 2 includes bunch winding forming means 100. The bunch winding forming means 100 includes, for example, a winding drum 22, a drum driving section 27 that independently drives the winding drum 22, a traverse guide 23 that is a yarn guide member, and a traverse guide 23 that independently drives the traverse guide 23. It has a traverse drive section 26a.

Conventionally, in a spinning machine, bunch winding has been performed using a yarn guide member provided on the doffing carriage 4 whose position with respect to the axial direction of the bobbin B does not change. In this embodiment, in each spinning unit 2 of the spinning machine 1, the position of the traverse guide 23 moves in the axial direction of the bobbin B during bunch winding. As a result, overlapping winding is realized in which the thread Y wound around the end region Ba on the large diameter side and the thread Y overlap at one or a plurality of locations (that is, at least a plurality of locations). In each spinning unit 2 of the spinning machine 1, in order to secure time for forming a bunch winding, the unit controller controls the winding speed when forming a bunch winding to be lower than the winding speed when winding the package P. 10 is performed.

Each spinning unit 2 includes, for example, a yarn storage roller 60 as a slack prevention means. For example, if the rotation speed of the bobbin B during bunch winding is lower than the rotation speed of the bobbin B during main winding, and the air spinning device 7 continues to generate yarn Y, the air spinning device 7 There is a risk that the thread Y may become loose between the bobbin B and the bobbin B. However, since the yarn accumulating roller 60 stores the yarn Y to prevent the yarn Y from becoming slack during bunch winding, bunch winding can be formed without the yarn Y being slack. As a result, the quality of bunch winding can be improved.

Each spinning unit 2 is equipped with a spinning speed adjustment section 92, as a slack prevention means, that makes the spinning speed during bunch winding formation in the air spinning device 7 lower than the spinning speed during normal spinning (when winding the package P). You can. The spinning speed adjustment section 92 adjusts the spinning speed by, for example, controlling a drive motor (not shown) that rotates each pair of rollers included in the draft device 6 and changing the rotational speeds thereof. Specifically, the spinning speed adjustment section 92 controls the rotational speed of the front roller pair, which is the most downstream pair of rollers in the yarn running direction, provided in the draft device 6, to be lower than during normal spinning. Further, the spinning speed adjustment section 92 may control the operating speed of a drawing device that draws out the yarn Y from the air spinning device 7. Specifically, the spinning speed adjustment section 92 may control the rotational speed of the yarn storage roller 60 to be lower than that during normal spinning. When the spinning machine 1 uses a known delivery roller pair instead of the yarn storage roller 60 to pull out the yarn Y from the air spinning device 7, the spinning speed adjustment unit 92 adjusts the rotational speed of the delivery roller pair to a level higher than that during normal spinning. It may be controlled to be lower.

Each spinning unit 2 may be provided with a winding speed adjusting section 93 as a slack prevention means that makes the winding speed during bunch winding a little higher than the winding speed during main winding. The main winding is winding performed after the bunch winding is formed, and is an operation for forming the package P by winding the yarn Y around the bobbin B. The winding speed adjustment section 93 adjusts the winding speed by, for example, controlling the drum drive section 27 to change the rotational speed of the winding drum 22.
Note that "increasing the winding speed a little higher" means increasing the winding speed by about 10% than the winding speed during the formation of the main winding.

The bunch winding control device 91, the spinning speed adjustment section 92, and the winding speed adjustment section 93 may be included in the unit controller 10 as shown in FIG. 3, or at least one of them may be included in the unit controller 10. It may be provided separately.

Next, the process of forming bunch winding in the spinning unit 2 (bunch winding forming method, winding order of yarn Y) will be explained. The empty bobbin B0 is guided to the winding device 13 by the doffing truck 4. The suction pipe 44 guides the yarn Y sent out from the air spinning device 7 to the empty bobbin B0. The empty bobbin B0 may be guided first to the winding device 13, or the empty bobbin B0 and the yarn Y may be guided simultaneously. Thereafter, the thread Y is sandwiched between the large diameter end Bc and the bobbin holder 28. The bunch winding control device 91 moves the traverse guide 23 in the axial direction of the bobbin B while rotating the empty bobbin B0 with the winding drum 22. At this time, the traverse guide 23 may reciprocate in the axial range (bunch winding region A1) corresponding to the end region Ba on the large diameter side, but does not reciprocate, and instead The direction of movement may be changed at least once during bunch winding so that an overlap occurs. Bunch winding is formed by traversing the thread Y.

The process of forming bunch winding will be described in more detail with reference to FIGS. 6 to 8. As shown in FIG. 6(a), the bunch winding control device 91 is configured to arrange the yarn Y at a position close to the package forming area A2 from the large diameter end Bc of the bobbin B before forming the bunch winding, for example. , moves the traverse guide 23. Subsequently, as shown in FIG. 6(b), the bunch winding control device 91 starts bunch winding and, during the bunch winding, toward the large diameter side end Bc (as indicated by the arrow in FIG. 6(b)). direction) to move the traverse guide 23. Thereafter, as shown in FIG. 6(c), the winding state changes from bunch winding to regular winding. In the states shown in FIGS. 6(a) to 6(c), the bobbin B is rotationally driven in the winding direction by the winding drum 22. Through this process of forming bunch winding, stronger overlapping winding of the yarn Y is realized.

As another example, as shown in FIGS. 7(a) to 7(c), the bunch winding control device 91 controls the position p1 of the end region Ba on the large diameter side of the bobbin B during formation of bunch winding, for example. The moving direction of the traverse guide 23 may be changed at least once between the position p2 and the position p2, which is closer to the package forming area A2 than the end area Ba. In the example in the middle of bunch winding shown in FIG. 7(b), the traverse guide 23 is moved in the direction approaching the package forming area A2 from the bobbin holder 28 (referred to as the main winding direction), and the traverse guide 23 is moved 2 to 3 times in the main winding direction. The circumferential thread Y is wound, but in the third and fourth turns, the traverse guide 23 is moved in a direction away from the package forming area A2 (referred to as the reverse main winding direction), and the thread Y returns to the bobbin holder 28. There is. Thereafter, as shown in FIG. 7(c), the winding state changes from bunch winding to regular winding. In the states shown in FIGS. 7(a) to 7(c), the bobbin B is rotationally driven in the winding direction by the winding drum 22. The stack winding of the yarn Y is also reliably realized by such a bunch winding formation process.

Another example is the winding order shown in FIGS. 8(a) to 8(d). The bunch winding control device 91 moves the traverse guide 23 in the axial direction of the bobbin B while rotating the bobbin B with the winding drum 22, thereby moving the large diameter side of the bobbin B located outside the package forming area A2. The yarn Y is wound around the end region Ba to form a bunch winding X in the end region Ba (see FIG. 8(a)), and the yarn Y is wrapped in the package forming region A2 at least once during the bunch winding formation. The traverse guide 23 is controlled so as to be guided (see FIGS. 8(b) and 8(c)). The unit controller 10 rotates the bobbin B with the winding drum 22 and moves the traverse guide 23 in the axial direction of the bobbin B to wind the yarn Y around the package forming area A2 to form the package P (package forming process). According to this spinning machine 1, at least a portion Yp of the bunch-wound yarn Y is arranged under the yarn layer of the package P. In other words, the border crossing part Xp (the part consisting of the above-mentioned part Yp) which is a part of the bunch winding X is arranged under the yarn layer of the package P. Therefore, even if the bunch winding X is about to unravel, the bunch winding X will not completely unwind (disappear). Note that in this spinning machine 1, the slack prevention means may be omitted.

In each of the above-described examples of the bunch winding forming process, "one bobbin revolution" is an index indicating how many times the traverse guide 23 makes one revolution in the axial direction with respect to the range of the bunch winding area A1 as a reference. The number of round trips per trip is important. The "number of reciprocations per revolution of the bobbin" can also be referred to as the moving speed of the thread guide member. In this embodiment, the moving speed of the thread guide member may be within the range of, for example, 0.05 reciprocation/rotation to 2.0 reciprocation/rotation, or may be within the range of 0.1 reciprocation/rotation to 1 reciprocation/rotation. It may be within the range.

According to the spinning machine 1 of this embodiment, the bunch winding control device 91 moves the traverse guide 23 in the axial direction of the bobbin B, thereby forming the bunch winding X. The bunch winding X is formed by traversing the yarn Y. Therefore, the threads Y and Y overlap each other more reliably than in a conventional winding state (bar winding, etc.) that does not involve controlling the position of the threads. The slack prevention means prevents the yarn Y from loosening during bunch winding, so the yarn Y can be reliably wound around the bobbin B. As a result, a bunch winding X that is difficult to unravel is formed.

Even if the yarn Y is continuously supplied from the air spinning device 7 during bunch winding, the yarn storage roller 60 as a slack prevention means prevents the yarn Y from flowing between the air spinning device 7 and the bobbin B. You can definitely prevent it from loosening.

The spinning speed adjustment section 92 as a slack prevention means can also ensure sufficient time for bunch winding X. As a result, in bunch winding, overlapping winding of the yarn Y is reliably realized.

Furthermore, in recent years, the spinning speed of spinning machines has tended to increase. Even in such a case, the winding speed adjustment section 93 serving as a slack prevention means can ensure sufficient time for forming bunch winding. As a result, overlapping winding of the thread Y is reliably realized. The winding speed during main winding includes a speed component in the axial direction of bobbin B (traverse speed of the traverse guide 23) in addition to a speed component in the rotational direction of bobbin B, but during bunch winding, the speed in the axial direction Since the component is small, by slightly increasing the winding speed during bunch winding, the yarn Y does not become slack during bunch winding.

The bunch winding forming means 100 includes a winding drum 22, a drum drive unit 27 that independently drives the winding drum 22, a traverse guide 23 that is a yarn guide member, and a traverse drive that independently drives the traverse guide 23. It has a section 26a. As a result, in each spinning unit 2, a bunch winding X that is difficult to unravel is formed. Furthermore, each spinning unit 2 can also form the bunch winding X without waiting for the doffing cart 4 to arrive, as in the conventional case.

With the yarn Y sandwiched between the large diameter end Bc of the bobbin B and the cradle arm 21, a bunch winding X is formed in the end region Ba adjacent to the large diameter end Bc of the bobbin B. As a result, a bunch winding X that is difficult to unravel is formed on the conical bobbin B.

Although the embodiments have been described above, one aspect of the present invention is not necessarily limited to the embodiments described above, and various changes can be made without departing from the gist thereof.

For example, as shown in FIG. 9, the process of forming bunch winding may be performed by the doffing truck 4 using a bunch winding roller 53. For example, in a certain spinning unit 2, the doffing cart 4 discharges the package P by the discharge process, and when the empty bobbin B0 is not attached between the bobbin holders 28, the doffing cart 4 executes the bobbin set process. First, the suction pipe 44 is extended upward. The suction pipe 44 captures the yarn end of the yarn Y discharged from the air spinning device 7 by sucking it in.

Next, the suction pipe 44 is moved downward while the yarn Y is being captured by suction. At this time, the unit controller 10 controls the yarn accumulating device 11 so that the yarn Y being sucked by the suction pipe 44 is wound around the yarn accumulating device 11. Since the suction force of the suction pipe 44 is small and does not overcome the resistance torque of the yarn storage device 11, the yarn Y is stored in the yarn storage device 11. After moving the suction pipe 44 downward, the suction pipe 44 is kept waiting at the standby position. As a result, the yarn Y is guided to form a predetermined yarn path between the tip of the suction pipe 44 and the yarn storage device 11.

Before or after moving the suction pipe 44, the cradle arm 21 is operated by the cradle operating arm 43 to separate one bobbin holder 28 from the other bobbin holder 28. The empty bobbin B0 stocked in the magazine 41 is delivered to the supply mechanism 47, and the empty bobbin B0 is gripped by the bobbin grip part 52 of the bobbin mounting mechanism 42 at the position of the supply mechanism 47 (the origin position of the bobbin mounting mechanism 42).

Subsequently, as shown in FIG. 9, the bobbin mounting mechanism 42 is advanced from the doffing truck 4 side, and the empty bobbin B0 is supplied to the bobbin holder 28. That is, the empty bobbin B0 and the yarn Y are simultaneously supplied to a position between the pair of bobbin holders 28. However, the empty bobbin B0 may be supplied first, or the yarn Y may be supplied first to the position between the pair of bobbin holders 28. In this state, the thread Y is arranged in the end area Ba of the empty bobbin B0 so as to cross the empty bobbin B0. Therefore, in this state, by operating the cradle arm 21 using the cradle operating arm 43 so as to bring one bobbin holder 28 closer to the other bobbin holder 28, the empty bobbin B0 is attached to the bobbin holder 28, and the thread Y is transferred to the empty bobbin B0. It is sandwiched and fixed between the end region Ba and the bobbin holder 28.

Then, a cutter (not shown) included in the bobbin mounting mechanism 42 cuts the thread Y at a position between the empty bobbin B0 and the suction pipe 44. The empty bobbin B0 is released from being held by the bobbin gripping section 52. The bunch winding roller 53 is brought into contact with the empty bobbin B0, and the empty bobbin B0 is rotated by the bunch winding roller 53 in the winding direction. As a result, a bunch winding X is formed in the end region Ba of the empty bobbin B0. Thereafter, the bobbin mounting mechanism 42 retreats to the doffing truck 4 side, and the bobbin setting process is completed. Upon completion of the bobbin setting process, the unit controller 10 rotates the cradle arm 21 so that the empty bobbin B0 comes into contact with the winding drum 22. As a result, winding tension is applied to the yarn Y, the yarn Y is gradually unwound from the yarn storage device 11, and the package P is immediately wound in the spinning unit 2 without interruption after the bobbin setting process is completed. The operation begins.

As shown in FIG. 10, an air cylinder 96 and a thread guide member 95 are attached to the tip of an arm member 53a that holds the bunch winding roller 53 via a suitable bracket 53b. A cutout 95a is formed at the tip of the thread guide member 95, and the thread guide member 95 is configured to be able to guide the thread Y through the cutout 95a. The air cylinder 96 can move the arm member 53a in the axial direction of the bobbin B by an air source (drive source) not shown. Thereby, during bunch winding formation, while the bobbin B is rotated by the bunch winding roller 53, the thread Y can be moved in the axial direction of the bobbin B by the thread guide member 95. In this modification, a bunch winding forming means 200 is constituted by an independently driven bunch winding roller (drum) 53, an independently driven yarn guide member 95, and an air cylinder 96. The doffing truck 4 equipped with the bunch winding forming means 200 can also form a bunch winding X that is difficult to unravel, as in the above embodiment. In this case, the traverse guide 23 of the spinning unit 2 may be configured to be movable only within the package forming area A2.

Even if the doffing cart 4 is equipped with the bunch winding forming means 200, each spinning unit 2 may also be equipped with the bunch winding forming means 200. Depending on the current situation of the spinning machine 1, which bunch winding forming means 200 is used to form the bunch winding may be determined.

Furthermore, as another modification, another device (a device different from the doffing cart 4 ) and a winding drum 22 of each spinning unit 2 may be employed.

The bunch winding X may be formed using the yarn Y stored in the yarn storage roller 60 in advance. For example, when an operator manually attaches the bobbin B to the cradle arm 21, the bunch winding X can be easily formed. More specifically, for example, when a fully rolled package P is attached to the cradle arm 21, the operator removes the package P from the cradle arm 21 and places the package P at an appropriate location (for example, on the package conveyor 80). put Then, the operator attaches the bobbin B to the cradle arm 21, pulls out the yarn Y from the yarn storage roller 60, and sandwiches the yarn Y between the bobbin B and the cradle arm 21 (more specifically, the bobbin holder 28). Thereafter, by operating an appropriate operation button of the spinning unit 2, the winding drum 22 and the traverse guide 23 start operating, and a bunch winding X is formed on the bobbin B. In this way, a winding start process is performed in which the thread Y is started to be wound around the attached empty bobbin B0.

In that case, the bunch winding X may be formed using the yarn Y previously stored in the yarn storage roller 60 until the remaining amount of yarn Y in the yarn storage roller 60 reaches a predetermined amount. In this case, the bunch winding X can be completed with the yarn Y connected between the yarn storage roller 60 and the package P. As a result, for example, without pulling out the yarn Y from the package P, the yarn splicing device 32 can splice the yarn and promptly start winding the yarn Y. Therefore, since the spinning unit 2 does not require the doffing truck 4, there is no time spent waiting for the doffing truck 4 in the spinning unit 2. As a result, the package P can be efficiently wound in the spinning machine 1.

The bunch winding forming means may include a bobbin drive unit that independently drives the bobbin instead of the drum drive unit 27.

In the embodiment described above, the traverse device 26 was a belt-type traverse device. As the traverse device, a traverse device other than a belt type (for example, an arm type traverse device) may be used.

In the embodiment described above, the draft device 6 is provided with a plurality of roller pairs as an example. However, the front roller pair (the roller pair disposed closest to the air spinning device 7 on the transport path of the fiber bundle F) may be configured as a part of another device. For example, the spinning unit 2 may include a supply device that supplies the fiber bundle F drafted by the draft device 6 to the air spinning device 7, and the front roller pair may be included as part of the supply device. The front roller pair may be included in the draft device 6 that drafts the sliver S or the supply device that supplies the fiber bundle F to the air spinning device 7, or may be provided independently without being included in other devices. good.

A combing roller may be provided instead of the draft device 6, and the air spinning device 7 may generate the yarn Y by twisting the fiber bundle supplied from the combing roller.

Instead of the above configuration, the air spinning device may include a pair of air jet nozzles that twist the fiber bundle in opposite directions.

In the spinning unit 2, an open-end spinning device (rotor-type spinning device) may be provided instead of the draft device 6 and the air spinning device 7. The open-end spinning device is a device that separates the fibers of the sliver S using combing rollers or airflow, transports the separated fibers into a rotor rotating at high speed by the airflow, and converges the fibers on the inner wall of the rotor. Yarn Y is produced by pulling out the converged fibers from the open-end spinning device.

In the spinning unit 2, the yarn storage device 11 had the function of pulling out the yarn Y from the air spinning device 7, but the yarn Y may be pulled out from the air spinning device 7 by a delivery roller and a nip roller. When the delivery roller and nip roller pull out the yarn Y from the air spinning device 7, the yarn storage device 11 may be replaced with a slack tube or a mechanical compensator that absorbs the slack of the yarn Y using a suction air flow. In this case, a slack tube, a mechanical compensator, or the like corresponds to the slack prevention means.

In the spinning unit 2, instead of connecting two yarn ends by the yarn splicing device 32, the yarn Y from the package P is inserted into the air spinning device 7, and the drafting operation of the drafting device 6 and the spinning of the air spinning device 7 are performed. By starting the operation, the yarn Y from the air spinning device 7 and the yarn Y of the package P may be connected (pieced).

In the spinning machine 1, each device is arranged so that the yarn Y supplied on the upper side is wound on the lower side in the machine height direction. However, each device may also be arranged so that the yarn supplied on the lower side is wound on the upper side.

In the spinning machine 1, at least one of the bottom rollers of the draft device 6 is driven by the power from the second end frame 5 (that is, commonly used by the plurality of spinning units 2). However, each part of the spinning unit 2 (eg, draft device, air spinning device, winding device, etc.) may be driven independently for each spinning unit 2.

When forming bunch winding X using the yarn guide member 95 of the doffing truck 4, the traverse guide 23 of the spinning unit 2 may be driven in common to a plurality of spinning units 2.

The tension sensor 9 may be arranged upstream of the yarn monitoring device 8 in the running direction of the yarn Y. The unit controller 10 may be provided for each spinning unit 2. In the spinning unit 2, the waxing device 12, the tension sensor 9, and the yarn monitoring device 8 may be omitted. If wax is not applied to the yarn Y, only the wax may be removed from the waxing device 12 without omitting the waxing device 12.

In FIG. 1, the spinning machine 1 is illustrated as winding up a cone-shaped package P, but it is also possible to wind up a cylindrical (cheese-shaped) package. In the case of a cone-shaped package, slack in the yarn Y occurs due to the traverse of the yarn Y, but the slack can be absorbed by the yarn storage device 11. The materials and shapes of each structure are not limited to the materials and shapes described above, but various materials and shapes can be employed.

1... Spinning machine, 2... Spinning unit, 4... Doffing truck, 6... Draft device, 7... Air spinning device (spinning device), 22... Winding drum (drum), 23... Traverse guide (yarn guide member), 26a...Traverse drive section, 27...Drum drive section, 60...Yarn storage roller (looseness prevention means), 91...Bunch winding control device (control device), 92...Spinning speed adjustment section, 93...Winding speed adjustment section, 95 ... Yarn guide member, 96 ... Air cylinder, 100 ... Bunch winding forming means, 200 ... Bunch winding forming means, B ... Bobbin, B0 ... Empty bobbin, Ba ... End region, Bc ... Large diameter side end, P ... Package ,Y...thread.

Claims (13)

a spinning device that generates yarn by spinning fiber bundles;
a bunch winding forming means having an independently driven drum and an independently driven thread guide member;
By moving the thread guide member in the axial direction of the bobbin while the bobbin is rotated by the drum, the thread is wound around the end region of the bobbin located outside the package forming region. a control device configured to form a bunch winding;
A spinning machine, comprising: a loosening prevention means for preventing the yarn from loosening during bunch winding. 2. The spinning machine according to claim 1, wherein the slack prevention means includes a yarn storage roller that stores the yarn from the spinning device by winding it around its outer peripheral surface. The spinning machine according to claim 1 or 2, wherein the bunch winding is formed using yarn stored in advance in a yarn storage roller. 2. The spinning machine according to claim 1, wherein the slack prevention means includes a spinning speed adjustment section that makes the spinning speed during forming the bunch winding in the spinning device lower than the spinning speed during normal spinning. The spinning machine according to claim 1, wherein the slack prevention means includes a winding speed adjustment section that makes the winding speed during the bunch winding higher than the winding speed during the main winding. 4. The control device according to claim 3, wherein the control device performs control to form the bunch winding using the yarn stored in advance in the yarn storage roller until the remaining amount of yarn in the yarn storage roller reaches a predetermined amount. The described spinning machine. Equipped with multiple spinning units,
Each of the plurality of spinning units includes:
The spinning device;
The drum, a drum drive unit that independently drives the drum, a traverse guide that is the yarn guide member, and a traverse drive unit that independently drives the traverse guide, which are included in the bunch winding forming means; The spinning machine according to any one of claims 1 to 6, comprising: a cradle arm capable of holding the conical bobbin having a large diameter end and a small diameter end;
The control device controls the control device to control the end region of the bobbin adjacent to the large-diameter end in a state where the thread from the thread storage roller is sandwiched between the large-diameter end of the bobbin and the cradle arm. The spinning machine according to any one of claims 1 to 7, wherein the spinning machine is controlled so that the bunch winding is formed. The control device moves the thread guide member from an outer end of the end region of the bobbin to a position close to the package forming region before or during the bunch winding formation, and then moves the thread guide member to a position close to the package forming region. Spinning machine according to any one of the preceding claims, characterized in that the thread guide member is moved towards the outer end of the end region. The control device is configured to rotate the thread guide member at least once between a position near the outside of the end region of the bobbin and a position closer to the package forming region than the end region of the bobbin during the bunch winding. The spinning machine according to any one of claims 1 to 8, wherein the spinning machine changes the direction of movement. a spinning device that generates yarn by spinning fiber bundles;
a bunch winding forming means having an independently driven drum and an independently driven thread guide member;
By moving the thread guide member in the axial direction of the bobbin while the bobbin is rotated by the drum, the thread is wound around the end region of the bobbin located outside the package forming region. A spinning machine, comprising: a control device configured to form a bunch winding and to guide yarn into the package forming region at least once during the formation of the bunch winding. A method for forming a package in which a spinning device winds yarn produced by spinning a fiber bundle, the method comprising:
a package forming step of forming the package by winding yarn around a package forming area while rotating a bobbin with an independently driven drum;
A bunch winding forming step is performed before the package forming step, in which a thread guide member that is independently driven is moved in the axial direction of the bobbin while the bobbin is rotated by the drum. the step of forming a bunch winding by winding a thread around an end region of the bobbin located on the outside to form a bunch winding in the end region;
In the bunch winding formation step, the package forming method prevents the yarn from loosening during the bunch winding formation. A package formed on a conical bobbin having a large diameter end and a small diameter end,
A package having a bunch winding formed by traversing a thread in an end region having a predetermined width located between a package forming region and the large-diameter end.

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