Winding device, winding facility, and textile machine

Abstract

To provide a winding device that can suppress the fluctuation of the contact pressure while utilizing the weight of the package for the contact pressure.SOLUTION: Viewed from the axial direction of a rotating drum 40, a cradle arm 30 oscillates so that the inclination of a straight line L connecting an oscillating fulcrum U and a center V of a bobbin Bw supported by the cradle arm 30 gradually approaches the vertical direction as the diameter of a package Pw increases. From the start of thread winding until the inclination of the straight line L matches the vertical direction, a contact point S between the rotating drum 40 and the bobbin Bw or the package Pw is located in the range greater than 0 degree and less than 45 degrees when the horizontal direction is 0 degree with the center C of the rotating drum 40 as the base point.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a winding device that winds a yarn onto a bobbin to form a package, and to a winding facility and a textile machine that include the winding device. [Background technology]

[0002] For example, the yarn winding unit described in Patent Document 1 has a cradle arm (referred to as a package support frame in Patent Document 1) that can swing around a rotation axis. The cradle arm rotatably supports a bobbin (package). A winding drum is in contact with the circumferential surface of the package supported by the cradle arm, and the yarn is wound onto the package when the winding drum is rotated. As the diameter of the package increases, the cradle arm swings away from the winding drum. In addition, a contact pressure adjustment mechanism is provided on the rotation axis of the cradle arm to press the package against the winding drum with a predetermined contact pressure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-155030 Summary of the Invention [Problem to be solved by the invention]

[0004] When applying a predetermined contact pressure to a package, if the entire contact pressure is applied by the contact pressure adjustment mechanism, the output of the contact pressure adjustment mechanism must be increased, leading to increased costs. In this regard, in Patent Document 1, the package is positioned above the winding drum (see FIG. 1), and the component of the package's weight perpendicular to the contact pressure surface contributes to the contact pressure. This makes it possible to apply a predetermined contact pressure even with a contact pressure adjustment mechanism with low output. However, there was a problem in that the contact pressure increases as the package diameter and weight increase, leading to large fluctuations in the contact pressure. This problem was particularly pronounced when performing "soft winding," which involves winding the yarn while maintaining a low contact pressure.

[0005] The present invention has been made in view of the above problems, and has an object to provide a winding device that can suppress fluctuations in contact pressure while utilizing the weight of the package as contact pressure. [Means for solving the problem]

[0006] The winding device of the present invention is a winding device that winds thread onto a bobbin to form a package, and comprises: a cradle arm that swings around a swing fulcrum provided at one end and rotatably supports the bobbin at the other end; and a rotating drum that rotates while in contact with the peripheral surface of the bobbin or the package supported by the cradle arm.When viewed from the axial direction of the rotating drum, the cradle arm swings so that as the diameter of the package increases, the inclination of the line connecting the swing fulcrum and the center of the bobbin supported by the cradle arm gradually approaches the vertical direction, and from the start of winding the thread until the inclination of the line coincides with the vertical direction, the point of contact between the rotating drum and the bobbin or the package is located in a range greater than 0 degrees and less than 45 degrees, with the horizontal direction being 0 degrees, with the center of the rotating drum as the base point.

[0007] In the present invention, as the diameter of the package increases, the cradle arm swings so that the inclination of the line connecting the swing fulcrum of the cradle arm and the center of the bobbin supported by the cradle arm gradually approaches the vertical. Then, from the start of yarn winding until the inclination of the line coincides with the vertical, the contact point between the rotating drum and the bobbin or package is located in a range greater than 0 degrees and less than 45 degrees, with the horizontal direction being 0 degrees, based on the center of the rotating drum. In other words, the package remains in contact with the rotating drum above the horizontal plane passing through the center of the rotating drum, allowing the weight of the package to be used for contact pressure. Furthermore, as will be explained in detail later, the proportion of the package weight perpendicular to the contact surface can be kept to less than 1 / √2, thereby suppressing fluctuations in contact pressure.

[0008] In the present invention, it is preferable to complete the formation of the package before the inclination of the straight line coincides with the vertical direction.

[0009] If winding of the yarn continues after the inclination of the straight line exceeds the vertical, the weight of the package acts in a direction that separates the package from the rotating drum, and the weight of the package cannot be used for contact pressure. Therefore, it is preferable to finish forming the package before the inclination of the straight line coincides with the vertical.

[0010] In the present invention, the cradle arm may be disposed so that the swing fulcrum is located below the center of the rotary drum.

[0011] With this arrangement, the cradle arm extends across the center of the rotating drum, so that the cradle arm and the rotating drum overlap in the vertical direction, which is advantageous in that the height of the winding device can be reduced.

[0012] In the present invention, the cradle arm may be disposed so that the swing fulcrum is located below the lower end of the rotary drum.

[0013] With this arrangement, the cradle arm and the rotary drum can overlap over a wider range in the vertical direction, further reducing the height of the winding device.

[0014] A winding facility according to the present invention is characterized in that a plurality of any one of the above winding devices are arranged in a vertical direction.

[0015] When multiple winding devices are arranged vertically, the height of the upper winding device becomes too high, making it difficult for the upper winding device to perform tasks such as collecting packages and supplying bobbins. In this regard, as described above, by using the winding device according to the present invention, it is possible to reduce the height of the winding device. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic side view of a false twisting machine according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram of the winding device at the start of winding. [Figure 3] FIG. 2 is a schematic diagram of the winding device when the winding package is completed. [Figure 4] FIG. 2 is a schematic diagram of the winding device when releasing the winding package. [Figure 5] FIG. 10 is a schematic diagram of the winding device when transferring the bobbin. [Figure 6] FIG. 2 is a schematic diagram showing a contact point between a bobbin or a winding package and a rotating drum. [Figure 7] FIG. 10 is a schematic diagram showing the proportion of the weight of the winding package that contributes to contact pressure. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] (Configuration of false twisting machine) Fig. 1 is a side view showing the schematic configuration of a false twisting machine 1 (corresponding to the textile machine of the present invention) according to this embodiment. Hereinafter, the direction perpendicular to the plane of the paper in Fig. 1 will be referred to as the machine base longitudinal direction, and the left-right direction on the plane of the paper will be referred to as the machine base width direction. The direction perpendicular to both the machine base longitudinal direction and the machine base width direction will be referred to as the vertical direction in which gravity acts. These directional terms will be used appropriately in the following explanation.

[0019] The false twisting machine 1 applies false twisting to a yarn Y made of a synthetic fiber such as polyester or nylon. The false twisting machine 1 includes a yarn supplying section 2 for supplying a plurality of yarns Y, a processing section 3 for false twisting the plurality of yarns Y supplied from the yarn supplying section 2, and a winding section 4 for winding up the plurality of yarns Y processed by the processing section 3. Each of the components of the yarn supplying section 2, the processing section 3, and the winding section 4 is arranged in a plurality of rows in the longitudinal direction of the machine.

[0020] The yarn supplying section 2 has a creel stand 7 that supports multiple yarn supply packages Ps and supplies multiple yarns Y to the processing section 3. The processing section 3 is configured to include, in order from upstream in the yarn running direction, a first feed roller 11, a twist stop guide 12, a first heating device 13, a cooling device 14, a false twist device 15, a second feed roller 16, an intertwining device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20. The winding section 4 has a winding facility 5 in which multiple winding devices 21 are arranged vertically. The winding facility 5 winds the multiple yarns Y that have been false twisted in the processing section 3 onto bobbins Bw using the multiple winding devices 21 to form winding packages Pw (corresponding to packages of the present invention).

[0021] The false twisting machine 1 has a main machine base 8 and a winding table 9 arranged at an interval in the width direction of the machine base. The main machine base 8 and the winding table 9 extend over approximately the same length in the longitudinal direction of the machine base and are arranged to face each other. The upper part of the main machine base 8 and the upper part of the winding table 9 are connected by a support frame 10. The devices that make up the processing section 3 are mainly attached to the main machine base 8 and the support frame 10. The main machine base 8, the winding table 9, and the support frame 10 form a work space 22 in which an operator can perform work such as threading on each device. The yarn path is formed so that the yarn Y mainly runs around the work space 22.

[0022] Next, we will explain each component of the processing unit 3. The first feed roller 11 is used to feed the yarn Y supplied from the yarn supplying unit 2 to the first heating device 13. The first feed roller 11 is disposed above the winding table 9.

[0023] The twist stop guide 12 is intended to prevent the twist imparted to the yarn Y by the false twist device 15, which will be described later, from propagating upstream in the yarn running direction of the twist stop guide 12. The twist stop guide 12 is disposed downstream in the yarn running direction of the first feed roller 11 and upstream in the yarn running direction of the first heating device 13.

[0024] The first heating device 13 is for heating the yarn Y fed from the first feed roller 11, and is installed on the support frame .

[0025] The cooling device 14 is for cooling the yarn Y heated by the first heating device 13. The cooling device 14 is arranged downstream of the first heating device 13 in the yarn running direction and upstream of the false twist device 15 in the yarn running direction.

[0026] The false twisting device 15 is a device for imparting twist to the yarn Y. The false twisting device 15 is disposed immediately downstream of the cooling device 14 in the yarn running direction.

[0027] The second feed roller 16 is a roller that feeds the yarn Y, which has been twisted by the false twist device 15, toward the intertwining device 17. The second feed roller 16 is disposed on the main machine base 8 downstream of the false twist device 15 in the yarn running direction. The conveyance speed of the yarn Y by the second feed roller 16 is faster than the conveyance speed of the yarn Y by the first feed roller 11. Therefore, the yarn Y is stretched between the first feed roller 11 and the second feed roller 16.

[0028] The intertwining device 17 is a device that intertwines the yarn Y by the jetting action of air. The intertwining device 17 is disposed below the second feed roller 16 on the main machine base 8.

[0029] The third feed roller 18 is a roller that sends the yarn Y, which has been entangled by the entangling device 17, toward the second heating device 19. The third feed roller 18 is disposed below the entangling device 17 on the main machine base 8. The conveying speed of the yarn Y by the third feed roller 18 is slower than the conveying speed of the yarn Y by the second feed roller 16. Therefore, the yarn Y is relaxed between the second feed roller 16 and the third feed roller 18.

[0030] The second heating device 19 is a device for heating the yarn Y fed from the third feed roller 18. The second heating device 19 is disposed below the third feed roller 18 on the main machine base 8.

[0031] The fourth feed roller 20 is a roller that feeds the yarn Y that has been heat-treated by the second heating device 19 toward the winding device 21. The fourth feed roller 20 is disposed below the winding table 9. The conveying speed of the yarn Y by the fourth feed roller 20 is slower than the conveying speed of the yarn Y by the third feed roller 18. Therefore, the yarn Y is relaxed between the third feed roller 18 and the fourth feed roller 20.

[0032] In the processing section 3 configured as described above, the yarn Y drawn between the first feed roller 11 and the second feed roller 16 is twisted by the false twist device 15. The twist formed by the false twist device 15 propagates up to the twist stop guide 12, but does not propagate upstream of the twist stop guide 12 in the yarn running direction. The yarn Y, which has been drawn and twisted, is heated and heat-set by the first heating device 13, and then cooled by the cooling device 14. The yarn Y is untwisted downstream from the false twist device 15, but the heat-set maintains the wavy false-twisted state of each filament.

[0033] The yarn Y that has been false twisted by the false twist device 15 is entangled by the entangling device 17 while being relaxed between the second feed roller 16 and the third feed roller 18, and is then guided downstream in the yarn running direction. Furthermore, the yarn Y is heat-set by the second heating device 19 while being relaxed between the third feed roller 18 and the fourth feed roller 20. Finally, the yarn Y sent from the fourth feed roller 20 is wound by the winding device 21 to form a winding package Pw.

[0034] The winding section 4 has a plurality of winding devices 21. The winding devices 21 are devices for winding the yarn Y fed from the fourth feed roller 20 onto a bobbin Bw to form a winding package Pw. The winding section 4 of this embodiment has a configuration in which the plurality of winding devices 21 are arranged in four vertical rows, that is, four winding devices 21 are lined up vertically. However, the number of winding devices 21 lined up vertically is not limited to four.

[0035] (Details of the winding device) The winding device 21 will be described in detail with reference to Figs. 2 to 5. Fig. 2 is a schematic diagram of the winding device 21 at the start of winding. Fig. 3 is a schematic diagram of the winding device 21 when the winding package Pw is completed. Fig. 4 is a schematic diagram of the winding device 21 when the winding package Pw is released. Fig. 5 is a schematic diagram of the winding device 21 when the bobbin Bw is handed over.

[0036] The winding device 21 includes a cradle arm 30, a rotating drum 40, a package storage unit 50, and a stocker 60. The winding device 21 winds the yarn Y onto an empty bobbin Bw attached to the cradle arm 30 to form a winding package Pw. Empty bobbins Bw on which the yarn Y is not wound are supplied from the stocker 60, and completed winding packages Pw are temporarily stored in the package storage unit 50. The supply of empty bobbins Bw to the stocker 60 and the collection of winding packages Pw from the package storage unit 50 are appropriately performed by an operator or an automatically operating robot device.

[0037] The cradle arm 30 is a long member for rotatably supporting the bobbin Bw. A pair of cradle arms 30 are arranged facing each other in the longitudinal direction of the machine base. The pair of cradle arms 30 sandwich and support the bobbin Bw (winding package Pw), and can also release the supported winding package Pw.

[0038] The cradle arm 30 is swingable about a swing shaft 31 provided at its lower end (corresponding to one end of the present invention), and rotatably supports the bobbin Bw at its upper end (corresponding to the other end of the present invention). The swing shaft 31 is parallel to the longitudinal direction of the machine base. Therefore, the cradle arm 30 swings about the swing shaft 31 in a plane perpendicular to the longitudinal direction of the machine base, i.e., within the plane of the paper in Figures 2 to 5.

[0039] An air cylinder 32 is connected to the cradle arm 30, which urges the cradle arm 30 counterclockwise in Figures 2 to 5 around the swing shaft 31. When the cradle arm 30 is urged counterclockwise by the air cylinder 32, the winding package Pw supported by the cradle arm 30 is pressed against the rotating drum 40, and contact pressure is applied to the winding package Pw.

[0040] The air cylinder 32 not only biases the cradle arm 30 counterclockwise, but also has the function of moving the cradle arm 30 to a release position (the position of the cradle arm 30 shown in FIG. 4). The release position is a position of the cradle arm 30 where the cradle arm 30 releases the winding package Pw, thereby enabling the winding package Pw to be sent to the package storage section 50. Note that in this embodiment, contact pressure is applied to the winding package Pw by the air cylinder 32, but contact pressure may be applied to the winding package Pw by other configurations.

[0041] The rotating drum 40 rotates while in contact with the circumferential surface of the bobbin Bw or winding package Pw supported by the cradle arm 30. The rotating drum 40 is driven to rotate by a motor 41, thereby rotating the bobbin Bw or winding package Pw in contact with the rotating drum 40. However, instead of driving the rotating drum 40 to rotate, the bobbin Bw may be directly driven to rotate.

[0042] The package storage unit 50 is disposed on one side of the cradle arm 30 in the width direction of the machine base and temporarily stores completed winding packages Pw. In this embodiment, the package storage unit 50 can store a maximum of two winding packages Pw, but the number of winding packages Pw that can be stored can be changed as appropriate. The package storage unit 50 is inclined downward from the other side to one side in the width direction of the machine base, and a stopper (not shown) is provided at the bottom end to prevent the winding package Pw from falling. Therefore, a winding package Pw released from the cradle arm 30 in the release position rolls along the inclination from the other side to one side of the package storage unit 50 and is stored in order from one side of the package storage unit 50.

[0043] The stocker 60 is disposed on the other side of the cradle arm 30 in the width direction of the machine base, and stores empty bobbins Bw. The stocker 60 of this embodiment can store a maximum of three bobbins Bw, but the number of bobbins Bw that can be stored can be changed as appropriate. The stocker 60 is inclined downward from the other side to one side in the width direction of the machine base. A stocker arm 61 extending downward from the stocker 60 is disposed at one end of the stocker 60.

[0044] The stocker arm 61 can swing about a swing shaft 62 provided at its lower end, and can support at its upper end the bobbin Bw located at one side of the multiple bobbins Bw stored in the stocker 60. The swing shaft 62 is parallel to the longitudinal direction of the machine base. Therefore, the stocker arm 61 swings about the swing shaft 62 in a plane perpendicular to the longitudinal direction of the machine base, i.e., within the plane of the paper in FIGS. 2 to 5. An air cylinder 63 is connected to the stocker arm 61, which swings the stocker arm 61 between the standby position shown in FIGS. 2 to 4 and the delivery position shown in FIG. 5. Note that the drive source for swinging the stocker arm 61 may be configured other than the air cylinder 63.

[0045] (Series of operations of the winding device) A series of operations of the winding device 21 from the start of winding onto one bobbin Bw to the start of winding onto the next bobbin Bw will be described with reference to FIGS.

[0046] 2, when winding of the yarn Y begins, the cradle arm 30 is urged toward the rotating drum 40 by the air cylinder 32. As a result, the cradle arm 30 swings downward about the swing shaft 31 toward the rotating drum 40, and the bobbin Bw comes into contact with the rotating drum 40. Thereafter, while the yarn Y is being wound around the bobbin Bw to form the winding package Pw, the cradle arm 30 remains urged toward the rotating drum 40 by the air cylinder 32. As a result, the winding package Pw is pressed against the rotating drum 40, and contact pressure is applied to the winding package Pw.

[0047] As the winding of the yarn Y progresses and the diameter of the winding package Pw increases, the cradle arm 30 gradually rises (swings clockwise in FIG. 2) away from the rotating drum 40. However, until the winding package Pw is completed as shown in FIG. 3, the cradle arm 30 does not exceed the vertical plane and tilt to one side in the machine width direction.

[0048] When the winding package Pw is completed, the yarn Y is cut by a cutter (not shown), and then the cradle arm 30 is swung to the release position by the air cylinder 32, as shown in Fig. 4. When the cradle arm 30 is in the release position, it releases the winding package Pw, so that the winding package Pw is removed from the cradle arm 30 and stored in the package storage section 50.

[0049] Next, as shown in Fig. 5, while the cradle arm 30 is maintained in the release position, the stocker arm 61 is swung from the standby position to the delivery position by the air cylinder 63. As a result, the bobbin Bw supported by the stocker arm 61 is delivered to the cradle arm 30, which is in the release position. After the delivery of the bobbin Bw is completed, the air cylinder 32 urges the cradle arm 30 toward the rotating drum 40, and the air cylinder 63 returns the stocker arm 61 from the delivery position to the standby position. As a result, the yarn Y can be wound onto a new bobbin Bw, as shown in Fig. 2.

[0050] (Configuration to suppress fluctuations in contact pressure) In this embodiment, as shown in Fig. 3, the winding package Pw is brought into contact with the circumferential surface of the rotating drum 40 from diagonally above the rotating drum 40. This allows the component of the weight of the winding package Pw that is perpendicular to the contact pressure surface to be used as contact pressure, making it possible to apply a predetermined contact pressure even with a low-output air cylinder 32. However, as the diameter of the winding package Pw increases, the contact pressure resulting from the weight of the winding package Pw increases, which has led to a problem of increased fluctuations in the contact pressure.

[0051] A configuration for suppressing fluctuations in contact pressure will be described with reference to Fig. 6. Fig. 6 is a schematic diagram showing the contact points between the bobbin Bw or winding package Pw and the rotating drum 40. The following description will be based on the state as seen from the axial direction of the rotating drum 40 (the longitudinal direction of the machine base) as shown in Fig. 6. The meanings of the symbols in Fig. 6 are as follows: C: Center of the rotating drum 40 U: swing fulcrum of the cradle arm 30 (center of the swing shaft 31 of the cradle arm 30) V: Center of the bobbin Bw supported by the cradle arm 30 L: A straight line connecting the swing fulcrum U of the cradle arm 30 and the center V of the bobbin Bw supported by the cradle arm 30 S: Contact point between the bobbin Bw or the winding package Pw and the rotating drum 40 S1: Contact point between the bobbin Bw and the rotating drum 40 at the start of winding S2: Point of contact between the winding package Pw and the rotating drum 40 when the inclination of the straight line L coincides with the vertical direction The dashed dotted line in FIG. 6 indicates the state at the start of winding, and the solid line indicates the state when the line L coincides with the vertical direction.

[0052] In this embodiment, the swing fulcrum U of the cradle arm 30 is located below the center C of the rotating drum 40, and further below the lower end of the rotating drum 40. On the other hand, the center V of the bobbin Bw is located above the center C of the rotating drum 40. Therefore, the winding package Pw contacts the rotating drum 40 from above, and the component of the weight of the winding package Pw in a direction perpendicular to the contact pressure surface (the tangent at the contact point S1 or the contact point S2) can be used as contact pressure. Furthermore, due to the positional relationship described above, the cradle arm 30 swings so that the slope of the line L gradually approaches the vertical as the diameter of the winding package Pw increases.

[0053] If the contact point S were near the upper end of the rotating drum 40, most of the weight of the winding package Pw would act as contact pressure. Therefore, as the winding of the yarn Y progresses and the weight of the winding package Pw increases, the contact pressure increases significantly. As a result, there have been problems, such as the inability to properly perform soft winding, which involves winding the yarn Y while maintaining a low contact pressure.

[0054] Therefore, in this embodiment, from the start of winding of the yarn Y until the inclination of the line L coincides with the vertical direction, the point of contact S between the bobbin Bw or winding package Pw and the rotating drum 40 is located in a range greater than 0 degrees and less than 45 degrees (the range indicated by the arrow in FIG. 6 ), with the horizontal direction being 0 degrees, relative to the center C of the rotating drum 40. In other words, from the start of winding of the yarn Y until the inclination of the line L coincides with the vertical direction, the point of contact S between the winding package Pw and the rotating drum 40 changes from point of contact S1 to point of contact S2, but does not deviate from the above range during that time. In reality, winding is not continued to the state indicated by the solid line in FIG. 6 , and the formation of the winding package Pw is completed before the inclination of the line L coincides with the vertical direction (see FIG. 3 ).

[0055] By keeping the contact point S between the winding package Pw and the rotating drum 40 within a range greater than 0 degrees and less than 45 degrees from the center C of the rotating drum 40 as the base point while the yarn Y is being wound, the contribution of the weight of the winding package Pw to the contact pressure can be kept below a certain level. This will be explained in detail below.

[0056] FIG. 7 is a schematic diagram showing the proportion of the weight W of the winding package Pw that contributes to contact pressure. More specifically, this diagram illustrates a case where the contact point S between the winding package Pw and the rotating drum 40 is at a 45-degree angle relative to the center C of the rotating drum 40. As shown in FIG. 7, if the contact point S between the winding package Pw and the rotating drum 40 is at a 45-degree angle relative to the center C of the rotating drum 40, the component of the weight W of the winding package Pw that is perpendicular to the contact pressure surface, i.e., the component that contributes to contact pressure, is W / √2. Therefore, if the contact point S between the winding package Pw and the rotating drum 40 is less than 45 degrees relative to the center C of the rotating drum 40, the component of the weight W of the winding package Pw that contributes to contact pressure can be kept below W / √2. This makes it possible to suppress fluctuations in contact pressure that accompany changes in the weight W of the winding package Pw.

[0057] (effect) In the winding device 21 of this embodiment, as the diameter of the winding package Pw increases, the inclination of the line L connecting the swing fulcrum U of the cradle arm 30 and the center V of the bobbin Bw supported by the cradle arm 30 gradually approaches the vertical. From the time winding of the yarn Y begins until the inclination of the line L coincides with the vertical, the contact point S between the rotating drum 40 and the bobbin or winding package Pw is located in a range greater than 0 degrees and less than 45 degrees, with the horizontal direction being 0 degrees, and the center C of the rotating drum 40 being the base point. In other words, the winding package Pw remains in contact with the rotating drum 40 above the horizontal plane passing through the center C of the rotating drum 40, allowing the weight W of the winding package Pw to be used for contact pressure. Furthermore, the proportion of the weight W of the winding package Pw in the direction perpendicular to the contact pressure surface can be kept to less than 1 / √2, thereby suppressing fluctuations in contact pressure.

[0058] In this embodiment, the formation of the winding package Pw is completed before the inclination of the straight line L coincides with the vertical direction. If winding of the yarn Y continues after the inclination of the straight line L exceeds the vertical direction, the weight W of the winding package Pw acts in a direction that separates the winding package Pw from the rotating drum 40, and the weight W of the winding package Pw cannot be used for contact pressure. Therefore, it is preferable to complete the formation of the winding package Pw before the inclination of the straight line L coincides with the vertical direction.

[0059] In this embodiment, the cradle arm 30 is disposed so that the swing fulcrum U is located below the center C of the rotating drum 40. With this arrangement, the cradle arm 30 extends so as to straddle the center C of the rotating drum 40 in the vertical direction, so that the cradle arm 30 and the rotating drum 40 can overlap in the vertical direction. This allows the height of the winding device 21 to be reduced. This configuration is particularly advantageous in that, when multiple winding devices 21 are arranged vertically as in this embodiment, the height of the upper winding device 21 can be reduced. Reducing the height of the upper winding device 21 makes it easier to perform tasks such as retrieving winding packages Pw from the package storage unit 50 and supplying bobbins Bw to the stocker 60.

[0060] In this embodiment, the cradle arm 30 is disposed so that the swing fulcrum U is located below the lower end of the rotating drum 40. Such an arrangement allows the cradle arm 30 and the rotating drum 40 to overlap over a wider range in the vertical direction, further reducing the height of the winding device 21.

[0061] (Other embodiments) Modifications of the present invention will now be described.

[0062] In the above embodiment, the swing fulcrum U of the cradle arm 30 is located below the center C of the rotating drum 40. However, the swing fulcrum U of the cradle arm 30 may be located above the center C of the rotating drum 40.

[0063] In the above embodiment, the package storage unit 50 is arranged on one side of the cradle arm 30 and the stocker 60 is arranged on the other side of the cradle arm 30 in the width direction of the machine base. However, such an arrangement is not essential, and the package storage unit 50 and the stocker 60 may be arranged on the same side of the cradle arm 30 in the width direction of the machine base. Furthermore, the specific configurations of the package storage unit 50 and the stocker 60 are not limited to those described in the above embodiment and can be changed as appropriate.

[0064] In the above embodiment, the winding device 21 is applied to the false twisting machine 1. However, the winding device 21 may also be applied to other textile machines.

[0065] In the above embodiment, a configuration is adopted in which a plurality of winding devices 21 are arranged side by side in the vertical direction. However, a configuration in which only one winding device 21 is provided may also be adopted. [Explanation of symbols]

[0066] 1: False twisting machine (textile machinery) 5: Winding equipment 21: Winding device 30: Cradle arm 40: Rotating drum Y: Thread Bw: bobbin Pw: Winding package (package)

Claims

1. A winding device that winds a yarn around a bobbin to form a package, a cradle arm that swings around a swing fulcrum provided at one end and rotatably supports the bobbin at the other end; a rotating drum that rotates while contacting the peripheral surface of the bobbin or the package supported by the cradle arm; an air cylinder that applies contact pressure to the package by pressing the package against the rotating drum; Equipped with When viewed from the axial direction of the rotary drum, the cradle arm swings such that the inclination of a line connecting the swing fulcrum and the center of the bobbin supported by the cradle arm gradually approaches a vertical direction as the diameter of the package increases; A winding device characterized in that, from the time when winding of the yarn begins until the inclination of the straight line coincides with the vertical direction, the point of contact between the rotating drum and the bobbin or the package is located in a range greater than 0 degrees and less than 45 degrees, with the horizontal direction being 0 degrees and the center of the rotating drum as the base point.

2. 2. The winding device according to claim 1, wherein the formation of the package is completed before the inclination of the straight line coincides with the vertical direction.

3. 2. The winding device according to claim 1, wherein the cradle arm is disposed so that the swing fulcrum is positioned below the center of the rotary drum.

4. A winding device as described in Claim 2, characterized in that the cradle arm is positioned so that the oscillating fulcrum is located below the center of the rotating drum.

5. 4. The winding device according to claim 3, wherein the cradle arm is disposed so that the swing fulcrum is positioned below the lower end of the rotary drum.

6. A winding device as described in Claim 4, characterized in that the cradle arm is positioned so that the oscillating fulcrum is located below the lower end of the rotating drum.

7. A winding facility comprising a plurality of winding devices according to any one of claims 1 to 6 arranged in a vertical direction.

8. A textile machine comprising the winding facility according to claim 7.

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