JP7550038B2 - Yarn Winding Machine - Google Patents

Description

The present invention relates to a yarn winding machine.

Patent Documents 1 and 2 disclose a yarn winding machine that winds multiple threads onto multiple bobbins to form multiple packages. More specifically, the yarn winding machine has a bobbin holder and multiple traverse devices (hereinafter, traverse devices). The bobbin holder extends along a predetermined direction and holds multiple bobbins arranged in the predetermined direction. Each of the multiple traverse devices has a traverse guide for traversing the thread along the predetermined direction, and is provided corresponding to each of the multiple bobbins. The multiple bobbins are rotated simultaneously by the bobbin holder, and the multiple traverse devices traverse the multiple threads in the predetermined direction, so that the threads are wound onto the multiple bobbins at the same time. Here, in recent years, bobbin holders have been made longer so that more bobbins can be held at one time. This has led to various problems, and measures are being taken to address these problems.

The first example of the problem and the solution is shown below. The above-mentioned yarn winding machine is configured to apply contact pressure to the outer peripheral surface of the package by a contact roller extending approximately parallel to the bobbin holder to shape the package. The bobbin holder is supported at one end approximately horizontally. In this configuration, as the package thickens during yarn winding (the weight of the package increases), the bobbin holder gradually bends downward due to the weight of the package. The amount of bending of the bobbin holder is greater at the tip end in a specified direction. If this causes the parallelism between the bobbin holder and the contact roller to fluctuate, the contact pressure may vary among multiple bobbins, and the quality may vary among packages. Therefore, the yarn winding machine described in Patent Document 1 is configured to maintain the contact roller and the bobbin holder approximately parallel by a tilting mechanism (angle adjustment unit) that actively tilts the contact roller.

A second example of the problem and a solution is shown below. As shown in Patent Document 2, a slit is formed at the end of each bobbin in a specified direction, through which the thread can be threaded. Patent Document 2 also discloses a threading mechanism having a guide for threading the thread in the slit. Here, if the number of bobbins held in the bobbin holder at one time increases, the position of the slit may change significantly due to an error in the length of the bobbins, and there is a risk of threading errors occurring. Therefore, the threading mechanism is configured so that the position of the guide in the specified direction can be adjusted. This helps to prevent threading errors from occurring.

JP 2012-158436 A JP 2019-214474 A

While measures have been taken to address the above problems associated with longer bobbin holders, the change in the positional relationship between the bobbin and the range of thread movement (traverse area) associated with the drive of the traverse guide has not been viewed as a problem, and no particular measures have been required. However, the present inventors have discovered that if the bobbin holder is made even longer, problems may become apparent due to the traverse area being misaligned in a specific direction relative to the bobbin. In other words, if the above positional relationship changes due to the longer bobbin holder, the thread winding position on the bobbin in the specific direction will change. This can cause problems such as package shape distortion.

The objective of the present invention is to prevent problems in package formation caused by fluctuations in the relative position between the traverse area and the bobbin in a given direction in which the bobbin holder extends.

The yarn winding machine of the first invention is a yarn winding machine that winds multiple yarns onto multiple bobbins to form multiple packages, and is characterized by comprising: a bobbin holder that is arranged to extend in a predetermined direction and holds the multiple bobbins in a line in the predetermined direction; multiple traverse guides for traversing the multiple yarns along the predetermined direction; a traverse device that includes at least one of the multiple traverse guides and is configured to drive the at least one traverse guide; and a movement drive unit that moves the traverse device at least in the predetermined direction.

In the present invention, by moving the traverse device in at least a predetermined direction using the movement drive unit, the movement range of the yarn (traverse area) associated with the drive of the traverse guide included in the traverse device can be moved in the predetermined direction. This makes it possible to suppress fluctuations in the relative position between the traverse area and the bobbin in the predetermined direction. Therefore, it is possible to suppress problems in package formation caused by fluctuations in the relative position between the traverse area and the bobbin.

The yarn winding machine of the second invention is the same as the first invention, except that the traverse area of at least one traverse guide is fixed relative to the traverse device.

In a configuration in which the traverse area is fixed relative to the traverse device, it is particularly effective to provide a moving drive unit as in the present invention.

The yarn winding machine of the third invention is the second invention, characterized in that each of the multiple traverse guides is configured to traverse each of the multiple yarns using two blade guides that are driven to rotate in opposite directions, or is attached to an arm that is driven to swing.

Specific examples of configurations in which the traverse area is fixed relative to the traverse device include a configuration in which each traverse guide has two blade guides (blade type) or is attached to an arm (arm type). In these configurations, it is particularly effective to provide a moving drive unit as in the present invention.

The yarn winding machine of the fourth invention is characterized in that in any one of the first to third inventions, the traverse device includes all of the multiple traverse guides.

In the present invention, the traverse regions of all traverse guides can be moved by a single moving drive unit. Therefore, the structure of the yarn winding machine can be simplified compared to a configuration that requires multiple moving drive units.

The yarn winding machine of the fifth invention is any one of the first to fourth inventions, characterized in that the movement drive unit has a linear actuator configured to be able to adjust the position of the traverse device in the predetermined direction.

Since the amount of deviation between the traverse area and the bobbin in a specific direction is small, it is necessary to fine-tune the position of the traverse device. In the present invention, the position of the traverse device can be precisely adjusted compared to a configuration in which the traverse device is moved simply by propulsion force (e.g., an air cylinder, etc.).

The yarn winding machine of the sixth invention is any one of the first to fifth inventions, characterized in that the bobbin holder is supported at one end so as to extend at least in the horizontal direction, and is arranged so as to extend at least in the predetermined direction, and is equipped with a contact roller that applies contact pressure to the multiple packages, and an angle adjustment unit configured to adjust the angle of the traverse device and the contact roller relative to the horizontal direction.

In this configuration, the angle of the traverse device and the contact roller is adjusted by the angle adjustment unit, thereby suppressing the variation in contact pressure between multiple packages that occurs as the packages become thicker. However, simply adjusting the angle may cause the traverse area to shift in a predetermined direction relative to the bobbin, which may cause the package shape to collapse. In this regard, in the present invention, the movement drive unit can prevent the traverse area from shifting in a predetermined direction relative to the bobbin, effectively preventing the package shape from collapsing.

The yarn winding machine of the seventh invention is characterized in that, in the sixth invention, it includes a support member that supports the traverse device and the contact roller and is configured to be movable by the angle adjustment unit, and the movement drive unit is configured to drive the support member to move at least in the predetermined direction.

In the present invention, the movement drive unit is configured to move the support member, similar to the angle adjustment unit. Therefore, the design can be simplified compared to when the yarn winding machine is configured to move the traverse device relative to the support member.

The yarn winding machine of the eighth invention is any one of the first to seventh inventions, and is characterized in that it includes a first control unit, and the first control unit controls the movement drive unit during a winding operation in which the multiple yarns are wound onto the multiple bobbins, respectively.

In the present invention, the position of the traverse region is adjusted during the winding operation. Therefore, the shape of the package can be effectively adjusted or the shape of the package can be changed to a certain degree of freedom.

The yarn winding machine of the ninth invention is characterized in that, in any one of the first to eighth inventions, it includes a position information acquisition unit that acquires position information regarding the positions of predetermined portions of the multiple bobbins in the predetermined direction.

In the present invention, the amount of deviation in a specified direction of the traverse region caused by an error in the bobbin length can be known based on the position information. Therefore, the position information can be used to compensate for the deviation in a specified direction of the traverse region relative to the bobbin.

The yarn winding machine of the tenth invention is the ninth invention, further comprising a second control unit, which controls the movement drive unit based on the position information before the start of a winding operation for winding the multiple yarns onto the multiple bobbins, respectively.

The positional deviation of the traverse region relative to the bobbin caused by an error in the bobbin length can be known in advance before the winding operation begins. Therefore, the present invention can effectively compensate for such positional deviation.

The yarn winding machine of the eleventh invention is any one of the first to tenth inventions, further comprising a third control unit, which controls the movement drive unit so as to reduce the positional deviation between the traverse region of the at least one traverse guide and the bobbin in the predetermined direction.

The present invention is particularly useful when you want to make the shape of the package symmetrical in a specific direction.

The yarn winding machine of the 12th invention is any one of the first to 11th inventions, characterized in that each bobbin held by the bobbin holder has a slit through which the yarn is hung at one end in the predetermined direction, and includes a fourth control unit, which controls the movement drive unit to move the traverse device at least to one side in the predetermined direction during a winding operation in which the multiple yarns are wound onto the multiple bobbins, respectively.

In general, the winding area of the outer circumferential surface of the bobbin where the thread is wound is closer to the other side (the side where the slit is not formed) than to one side (the side where the slit is formed) in a specific direction. In other words, the area (margin) of the outer circumferential surface of the bobbin where the thread is not wound is narrower on the other side in the specific direction. In other words, the margin is relatively wide on one side of the bobbin in the specific direction, and relatively narrow on the other side of the bobbin in the specific direction. In general, as the package becomes thicker, a force is applied to the radial inside of the package due to the tension of the thread wound on the package. This tends to cause the radial inside part of the package to bulge in the specific direction. For this reason, there is a greater risk that the thread will protrude more easily on the other side of the bobbin in the specific direction than on one side of the bobbin in the specific direction.

In the present invention, the traverse region is deliberately moved to one side in a predetermined direction during the winding operation. In this way, by allowing an increase in the amount of bulging of the end face of one side of the package in the predetermined direction (the side where the bobbin margin is wider), the amount of bulging of the end face of the package on the other side in the predetermined direction (the side where the bobbin margin is narrower) can be reduced accordingly. Therefore, the margin on the other side of the bobbin in the predetermined direction can be prevented from narrowing, reducing the risk of the thread spilling out of the bobbin, etc.

The yarn winding machine of the thirteenth invention is the twelfth invention, characterized in that the fourth control unit, during the winding operation, moves the traverse device to one side in the predetermined direction and then to the other side in the predetermined direction.

During the winding operation, the traverse device may be moved only to one side in the specified direction, but in this case, there is a risk that the radially outer portion of the package may be significantly biased to one side in the specified direction. This may cause the shape of the package to be distorted. In the present invention, it is possible to prevent the radially outer portion of the package from being biased to one side in the specified direction while preventing the margin on the other side of the bobbin in the specified direction from becoming narrow.

FIG. 2 is a side view of the spinning take-up machine according to the embodiment. FIG. 6A and 6B are explanatory diagrams showing the angle adjustment of the contact roller. 11A to 11D are reference diagrams each showing a schematic diagram of a cause of misalignment between a traverse region and a bobbin in a predetermined direction. FIG. 11 is an explanatory diagram showing an error in bobbin length. FIG. 4 is an explanatory diagram showing a movement drive unit. 5A to 5C are explanatory diagrams showing an example of control of the movement drive unit. 13A to 13D are reference drawings showing the shape of the package. 13A and 13B are explanatory views showing a yarn take-off machine according to a modified example.

Next, an embodiment of the present invention will be described. The left-right direction on the paper surface of FIG. 1 is defined as the front-rear direction. The direction in which gravity acts is defined as the up-down direction (vertical direction), and the direction perpendicular to both the front-rear direction and the up-down direction (perpendicular to the paper surface) is defined as the left-right direction.

(Outline of the spinning take-off machine)
The yarn take-up machine 1 according to the present embodiment (yarn winding machine of the present invention) will be described with reference to Fig. 1. Fig. 1 is a side view of the yarn take-up machine 1. The yarn take-up machine 1 includes a take-up section 3 that takes up a yarn Y spun from a spinning device 2, and a winding device 4 that winds the yarn Y taken up by the take-up section 3 onto multiple bobbins B.

The take-up section 3 has a first godet roller 11 and a second godet roller 12. The take-up section 3 is configured to take up the yarn Y spun from the spinning device 2 by the first godet roller 11 and the second godet roller 12 and send it to the winding device 4. The first godet roller 11 is a roller whose rotation axis direction is approximately parallel to the left-right direction. The first godet roller 11 is disposed below the spinning device 2 and above the front end of the winding device 4. The first godet roller 11 is driven to rotate by a motor (not shown). A yarn regulating guide 13 is disposed immediately above the first godet roller 11. The yarn regulating guide 13 is, for example, a known comb-tooth shaped yarn guide. The yarn regulating guide 13 is configured to regulate the distance between adjacent yarns Y to a predetermined value.

The second godet roller 12 is a roller whose rotation axis direction is approximately parallel to the left-right direction. The second godet roller 12 is disposed above and behind the first godet roller 11. The second godet roller 12 is driven to rotate by a motor (not shown). The second godet roller 12 is supported movably on a guide rail 14. The guide rail 14 extends obliquely upward and backward. The second godet roller 12 is configured to be movable along the guide rail 14 by a moving mechanism (not shown). As a result, the second godet roller 12 is movable between a position (see solid line) when the yarn Y is wound onto the bobbin B and a position (see dashed line) when the yarn threading operation is performed, in close proximity to the first godet roller 11.

(Winding device)
The configuration of the winding device 4 will be described with reference to Figs. 1 and 2. Fig. 2 is a front view of the winding device 4. The winding device 4 includes a machine base 20, a plurality of swing support guides 21, a traverse device 22, a turret 23, two bobbin holders 24, a contact roller 25, a support member 26, an angle adjustment unit 27, and a control unit 28. The winding device 4 is configured to traverse a plurality of yarns Y sent from the take-up unit 3 in the front-rear direction by the traverse device 22, while winding the plurality of yarns Y onto a plurality of bobbins B held by the bobbin holder 24 to form a plurality of packages P. Hereinafter, the operation of winding the yarns Y onto the bobbins B will be referred to as a winding operation.

As shown in FIG. 1, the machine base 20 has a machine base main body 20a arranged upright at the rear of the winding device 4, and a frame body 20b fixed to the upper part of the machine base main body 20a and extending forward. The machine base main body 20a supports a turret 23 and the like. The frame body 20b is, for example, a hollow columnar member. The frame body 20b supports a contact roller 25 extending in the front-rear direction via a support member 26 and an angle adjustment part 27 (details will be described later).

The multiple swing support point guides 21 are yarn guides that serve as fulcrums when the multiple yarns Y are traversed. The multiple swing support point guides 21 are provided corresponding to the multiple yarns Y, respectively. The multiple swing support point guides 21 are arranged along the front-to-rear direction.

The traverse device 22 is configured to traverse multiple yarns Y along the front-rear direction. The traverse device 22 has a housing 31, multiple traverse guides 32 arranged corresponding to the multiple yarns Y, and a traverse motor 33 (see FIG. 2). The traverse device 22 is a vane-type traverse device described in, for example, JP 2019-214474 A (the vane guide described in the above publication corresponds to the traverse guide 32 in this embodiment). Each of the multiple traverse guides 32 has, for example, two vane guides 34 (see FIG. 1. Only one vane guide 34 is shown in FIG. 1 corresponding to each traverse guide 32). The two vane guides 34 are configured to be rotated in opposite directions when viewed from a predetermined rotation axis direction. Each traverse guide 32 is configured to traverse each yarn Y by two vane guides 34 rotated by a traverse motor 33. In this configuration, the range of movement (traverse area) of the yarn Y in the front-rear direction associated with the driving of the multiple traverse guides 32 is fixed relative to the housing 31. In other words, the center position of the traverse area of each traverse guide 32 does not move relative to the traverse device 22. In addition, the length of the traverse area in the axial direction is constant. In this embodiment, all of the traverse guides 32 are included in the traverse device 22. The traverse motor 33 is a common driving source for the multiple traverse guides 32. The multiple traverse guides 32 are driven simultaneously at least in the front-rear direction by the traverse motor 33. As a result, the yarn Y hung on each traverse guide 32 is traversed simultaneously with each swing support point guide 21 as a support point.

The turret 23 is a disk-shaped member whose axial direction is approximately parallel to the front-rear direction. The turret 23 is rotatably supported by the machine body 20a. The turret 23 is driven to rotate by a turret motor (not shown). The turret 23 supports two bobbin holders 24 at one end. The turret 23 moves the two bobbin holders 24 by rotating about a rotation axis approximately parallel to the front-rear direction. The turret 23 is configured to be able to switch the positions of the two bobbin holders 24. This makes it possible to replace the bobbin B on one bobbin holder 24 while the bobbin B attached to the other bobbin holder 24 is being wound with thread. The turret 23 is also configured to be able to rotate as the amount of wound yarn Y increases during the winding operation (see the arrow in FIG. 2).

The two bobbin holders 24 are configured so that multiple bobbins B can be attached to each of them. The two bobbin holders 24 are rotatably supported by the turret 23 supported by the machine body 20a. The two bobbin holders 24 are cantilevered by the turret 23. When viewed from the front-rear direction, the two bobbin holders 24 are arranged so as to be point-symmetrical with respect to the center point of the turret 23. That is, for example, when one bobbin holder 24 is positioned at the top, the other bobbin holder 24 is positioned at the bottom. The two bobbin holders 24 extend forward from the turret 23. The axial direction (hereinafter, the specified direction) in which the two bobbin holders 24 extend is generally parallel to the front-rear direction. The specified direction fluctuates slightly during the winding operation, as described later. In each bobbin holder 24, multiple bobbins B individually provided for multiple yarns Y are attached in a line in the axial direction. In this embodiment, the number of bobbins B that can be mounted on one bobbin holder 24 is 16 (see FIG. 1), but is not limited to this. The two bobbin holders 24 are each rotated by an individual winding motor (not shown). The two bobbin holders 24 are located below the traverse device 22.

While the yarn Y is being wound around the bobbin B attached to one of the bobbin holders 24 to form the package P, the weight of the package P increases as the amount of yarn Y increases (the package P becomes thicker). As described above, the bobbin holder 24 is supported by a cantilever. Therefore, immediately after the start of the winding operation, the position of the bobbin holder 24 is maintained approximately horizontal (see FIG. 3(a)), but as the package P becomes thicker, the bobbin holder 24 bends downward due to the weight of the package P (see FIG. 3(b)). The amount of bending of the bobbin holder 24 at this time is greater toward the axial tip of the bobbin holder 24.

The contact roller 25 is disposed immediately above the upper bobbin holder 24. The axial direction of the contact roller 25 is approximately parallel to the front-rear direction. The contact roller 25 is configured to apply contact pressure to the surfaces of the multiple packages P supported by the upper bobbin holder 24, thereby arranging the shapes of the packages P.

The support member 26 is configured to support the contact roller 25 and the traverse device 22. As shown in FIG. 1 and FIG. 2, the support member 26 is attached to the frame body 20b so as to be able to swing, for example. The support member 26 has, for example, a swing shaft 41, a pair of arm portions 42, and a roller support shaft 43. The swing shaft 41 extends generally in the front-rear direction. The arm portions 42 are fixed to both ends of the swing shaft 41 in the front-rear direction. The swing shaft 41 is configured to swing the pair of arm portions 42 and the roller support shaft 43 with the extension direction of the swing shaft 41 as the swing axis direction. The swing shaft 41 is rotatably supported by a mounting member 44 attached to the front end of the frame body 20b and a slider 46 (described later) arranged near the rear end of the frame body 20b. The mounting member 44 rotatably supports the swing shaft 41. In addition, the mounting member 44 supports the swing shaft 41 so that it can swing up and down around the mounting member 44 as the swing shaft center, for example, by an axis member not shown. This allows the angle of the swing shaft 41 with respect to the horizontal direction to be adjusted by the angle adjustment unit 27 (details will be described later). The pair of arm parts 42 are fixed to both ends of the swing shaft 41 in the front-rear direction. The pair of arm parts 42 extend from the swing shaft 41 in a direction substantially perpendicular to the front-rear direction. The housing 31 of the traverse device 22 is fixed to the middle part of the pair of arm parts 42. The roller support shaft 43 is fixed to the end of the pair of arm parts 42 on the opposite side to the swing shaft 41. The roller support shaft 43 is an axis arranged substantially parallel to the swing shaft 41. The roller support shaft 43 rotatably supports the contact roller 25.

The angle adjustment unit 27 is configured to change the angle of the support member 26 with respect to the horizontal direction. The angle adjustment unit 27 has, for example, a ball screw mechanism 45. The ball screw mechanism 45 includes a slider 46 and is configured to be able to move the slider 46 in the vertical direction. The slider 46 rotatably supports the rear end of the swing shaft 41. By using such a ball screw mechanism 45 to move the rear end of the swing shaft 41 in the vertical direction, the angle of the swing shaft 41 with respect to the horizontal direction can be changed. This changes the angle of the support member 26 with respect to the horizontal direction, and as a result, the angles of the contact roller 25 and the traverse device 22 with respect to the horizontal direction change. This allows the angles of the contact roller 25 and the traverse device 22 to follow the bending of the bobbin holder 24 that accompanies the winding thickening of the package P.

The control unit 28 includes a CPU, a ROM, a RAM, etc. The control unit 28 controls each unit by the CPU according to a program stored in the ROM. Specifically, the control unit 28 controls the turret motor (not shown), the traverse motor 33, the ball screw mechanism 45, etc. The control unit 28 functions as the first control unit, the second control unit, the third control unit, and the fourth control unit of the present invention.

In the winding device 4 having the above configuration, when the upper bobbin holder 24 is rotated, the yarn Y traversed by the traverse guide 32 is wound onto the bobbin B to form a package P. While the package P is being formed, the contact roller 25 comes into contact with the surface of the package P and applies contact pressure to adjust the shape of the package P. The turret 23 is rotated in the direction of the arrow in FIG. 2 as the diameter of the package P increases (the package P becomes thicker) as the yarn Y is wound onto the bobbin B. This increases the distance between the bobbin holder 24, which is fitted with the bobbin B around which the yarn Y is wound, and the contact roller 25. The contact roller 25 can be swung around the swing shaft 41, so it swung in accordance with the movements of the bobbin holder 24 and the package P. This maintains contact between the contact roller 25 and the package P.

As described above, the posture of the bobbin holder 24 is maintained approximately horizontal immediately after the start of the winding operation (see FIG. 3(a)). As the package P becomes thicker, the bobbin holder 24 bends downward due to the weight of the package P (see FIG. 3(b)). In other words, the axial direction (predetermined direction) of the bobbin holder 24 changes with respect to the horizontal direction as time passes from the start of the winding operation. In such a situation, if the angle between the bobbin holder 24 and the contact roller 25 changes, the contact pressure by the contact roller 25 varies among the multiple packages P, resulting in variation in quality among the multiple packages P. To solve this problem, the control unit 28 controls the angle adjustment unit 27 during the winding operation to change the angle of the support member 26 with respect to the horizontal direction. This maintains the bobbin holder 24 and the contact roller 25 approximately parallel to each other. As described above, the support member 26 supports the traverse device 22 together with the contact roller 25. Therefore, even if the bobbin holder 24 is tilted from the horizontal direction, the movement direction of the yarn Y caused by the drive of the traverse guide 32 can be made to approximately match the predetermined direction. This can also prevent problems such as the winding angle (traverse angle) when the yarn Y is wound onto the bobbin B deviating from the target value.

However, the inventors of the present application have found that even with the above configuration, as the bobbin holder 24 becomes longer, new problems are becoming apparent. Below, a specific description will be given with reference to Figs. 4(a)-(d) and 5. Fig. 4(a) is an explanatory diagram showing the positional relationship between the bobbin B before the start of the winding operation and the movement area (traverse area R) of the yarn Y accompanying the driving of the traverse guide 32. Fig. 4(b) is an explanatory diagram showing the positional relationship between the bobbin B and the traverse area R after a predetermined time has elapsed since the start of the winding operation. Fig. 4(c) is a diagram showing the above positional relationship in Fig. 4(a) more typically. Fig. 4(d) is a diagram showing the above positional relationship in Fig. 4(b) more typically. Fig. 5 is an explanatory diagram regarding the error in the length of the bobbin B attached to the bobbin holder 24. In Figs. 4(a)-(d), the side facing the front is one side in the specified direction. Also, the side facing the rear is the other side in the specified direction.

First, the problem caused by the bending of the bobbin holder 24 as described above will be described. Before the start of the winding operation, the bobbin B and the traverse region R have a predetermined positional relationship in the front-rear direction (see FIG. 4(a)). As a result, immediately after the start of the winding operation, the yarn Y is wound in a predetermined region on the outer circumferential surface of the bobbin B in the predetermined direction. However, when the package P becomes thicker and the bobbin holder 24 bends (when the predetermined direction is tilted relative to the front-rear direction), even if the angles of the contact roller 25 and the traverse device 22 are adjusted, the traverse region R gradually shifts to the other side in the predetermined direction relative to the bobbin B. The inventors of the present application have found that this causes the shape of the package P to unintentionally become distorted to the other side in the predetermined direction (see FIG. 4(b)).

This phenomenon will be described more diagrammatically with reference to Figs. 4(c) and (d). A simple example will be given below. Assume that the above-mentioned oscillating shaft 41 is arranged along the line segment L1. Assume that a predetermined point on the front end of the oscillating shaft 41 is the point P1a. Assume that a predetermined point on the rear end of the oscillating shaft 41 is the rear end of the line segment L1, and the point on the rear end of the line segment L1 is the point P1b. Assume also that the bobbin holder 24 is arranged along the line segment L2 arranged below the line segment L1. Assume that a predetermined point on the front end (tip end) of the bobbin holder 24 is the point P2a. Assume that a predetermined point on the rear end (base end) of the bobbin holder 24 is the point P2b. For the sake of simplicity, assume that the length of the line segment L1 and the length of the line segment L2 are the same. Before winding begins (see Fig. 4(c)), the positions of the line segments L1 and L2 are the same in the front-rear direction. Also, the predetermined direction is parallel to the front-rear direction. In this case, the positions of points P1a and P2a coincide in the predetermined direction (see the two-dot chain line in FIG. 4(c)). Next, when the package P becomes thicker and the bobbin holder 24 bends, the line segment L2 can be considered to have rotated downward by a predetermined angle around point P2b. At this time, the predetermined direction is tilted by a predetermined angle with respect to the front-to-rear direction. In this state, when focusing on the predetermined direction, point P2a is shifted to one side with respect to point P1a (see the two-dot chain line in FIG. 4(d)). In this case, even if the angle of line segment L1 is changed according to the change in the angle of line segment L2, the position of line segment L1 in the predetermined direction cannot be made to coincide with the position of line segment L2 in the predetermined direction by that alone. Even if line segment L1 is rotated around point P1a or around point P1b, such a positional shift cannot be eliminated.

Although detailed illustration is omitted, depending on the orientation of the bobbin B attached to the bobbin holder 24, a more serious problem may occur. Generally, in the axial direction of the bobbin B, a slit S is formed at one end of the bobbin B through which the thread Y is wound (see the broken lines in Figs. 4(a) and (b)). Generally, the traverse region R is set so as to be closer to the side where the slit S is not formed in the axial direction of the bobbin B. In other words, on the side of the bobbin B where the slit S is not formed, the margin where the thread is not wound is narrow. Furthermore, generally, as the package P becomes thicker, a force is applied to the radially inward direction of the package P due to the tension of the thread Y wound around the package P. This causes the radially inner portion of the package P to bulge in a predetermined direction. For this reason, when the bobbin B is attached to the bobbin holder 24 so that the slit S is located on one side in the predetermined direction, there is a greater risk that the thread Y will easily protrude from the bobbin B on the other side of the predetermined direction of the bobbin B.

Next, a problem caused by an error in the axial length of the bobbin B mounted on the bobbin holder 24 will be described. Generally, the error in the axial length of each bobbin B is small. However, if the bobbin holder 24 is lengthened and the number of bobbins B mounted on the bobbin holder 24 at one time increases, the error becomes larger accordingly. For example, assume that a relatively short bobbin B (bobbin B1) is mounted on the bobbin holder 24 as shown in the upper part of the page of FIG. 5, and that a relatively long bobbin B (bobbin B2) is mounted on the bobbin holder 24 as shown in the lower part of the page of FIG. 5. In this case, the difference dLt between the total length (total length) of the multiple bobbins B1 and the total length of the multiple bobbins B2 increases as the number of bobbins B mounted on the bobbin holder 24 at one time increases. In such a case, the positional relationship between the bobbin B and the traverse region R (see FIGS. 4(a) and (b)) in a predetermined direction cannot be properly maintained, and there is a risk of a problem occurring in the formation of the package P.

To prevent problems with the formation of the package P caused by fluctuations in the relative position between the traverse region R and the bobbin B in a specific direction, the winding device 4 of the yarn take-up machine 1 of this embodiment has a movement drive unit 50 as described below.

(Movement drive unit)
The configuration of the movement drive unit 50 will be described with reference to FIG. 6. In FIG. 6, the components housed in the machine body 20a are also shown. The movement drive unit 50 is for moving the entire traverse device 22 at least in a predetermined direction. An example of the movement drive unit 50 will be described below. The movement drive unit 50 has, for example, a ball screw mechanism 51 (the linear actuator of the present invention). The ball screw mechanism 51 is configured to be able to adjust the position of the traverse device 22 in a predetermined direction. The ball screw mechanism 51 is connected to the rear end of the swing shaft 41 of the support member 26. The ball screw mechanism 51 has a movement motor 52, a screw shaft 53, and a slider 54.

The moving motor 52 is configured to rotate the screw shaft 53. The moving motor 52 is, for example, a known servo motor or stepping motor. The screw shaft 53 is fixed to the rotating shaft of the moving motor 52. The moving motor 52 is connected to the slider 46 of the angle adjustment unit 27 described above, for example, by a connecting member 55. This fixes the position of the moving motor 52 relative to the slider 46. Therefore, the moving motor 52 can move in accordance with the up and down movement of the slider 46 (i.e., in accordance with the change in angle of the oscillation shaft 41). The moving motor 52 is electrically connected to the control unit 28 and is driven and controlled by the control unit.

The screw shaft 53 rotates to move the slider 54 in at least a predetermined direction. The extension direction of the screw shaft 53 is approximately parallel to the extension direction of the swing shaft 41 of the support member 26 described above. A male screw is formed on the screw shaft 53. The screw shaft 53 is screwed with the slider 54. The slider 54 moves the support member 26 in at least a predetermined direction by moving in the extension direction of the screw shaft 53. A female screw is formed on the slider 54. The slider 54 is screwed with the screw shaft 53. The slider 54 is attached to the rear end of the swing shaft 41 of the support member 26. This allows the slider 54 to move in accordance with the angular change of the swing shaft 41. As described above, the ball screw mechanism 51 as a whole follows the angular change of the swing shaft 41 (i.e., the angular change of the support member 26). This prevents excessive force from being applied to the ball screw mechanism 51.

Furthermore, the winding device 4 is configured as follows to allow the support member 26 to move at least in a predetermined direction. First, the slider 46 of the angle adjustment unit 27 supports the rear end of the oscillating shaft 41 so that it can slide in a predetermined direction. As a specific example, the slider 46 is formed with a through hole 46a that penetrates in the axial direction of the oscillating shaft 41, and the oscillating shaft 41 is inserted through the through hole 46a. Similarly, the above-mentioned mounting member 44 (see FIG. 1, etc.) supports the front end of the oscillating shaft 41 so that it can slide in a predetermined direction.

In the movement drive unit 50 having the above configuration, when the screw shaft 53 is rotated by the movement motor 52, the slider 54 moves in the extension direction of the screw shaft 53 (see the arrow in Figure 6). As a result, the entire support member 26 including the oscillating shaft 41 moves integrally with the slider 54 in the extension direction of the oscillating shaft 41. As a result, the entire traverse device 22 attached to the support member 26 moves at least in a predetermined direction. When the extension direction of the screw shaft 53 and the extension direction of the oscillating shaft 41 are approximately parallel to the axial direction (predetermined direction) of the bobbin holder 24, the traverse device 22 moves along the predetermined direction. In this embodiment, the contact roller 25 also moves at least in the predetermined direction in conjunction with the movement of the support member 26.

(Position control of traverse area)
Next, the control of the movement drive unit 50 by the control unit 28 (i.e., the position control of the traverse region R described above) will be described with reference to Figures 7(a)-(c) and Figures 8(a)-(d). Figures 7(a)-(c) are explanatory diagrams showing an example of control of the movement drive unit 50 by the control unit 28 (more specifically, the movement of the traverse region R). Figure 8(a) is a side view of the package P. Figure 8(b) is a cross-sectional view of the package P shown in Figure 8(a). Figure 8(c) is a cross-sectional view of the package P according to a second control example (1) described below. Figure 8(d) is a cross-sectional view of the package P according to a second control example (2) described below.

First, the control performed before starting winding of the yarn Y onto the multiple bobbins B (before starting the winding operation) will be described. Before starting the winding operation, the control unit 28 controls the movement drive unit 50 based on information on the total length of the multiple bobbins B to adjust the position of the traverse region R at least in a predetermined direction (see FIG. 7(a)). An example of the adjustment method is as follows. Before starting the winding operation, the control unit 28 acquires information on the total length of the multiple bobbins B by some means or method. The information may be input to the control unit 28 by, for example, an operator. Alternatively, for example, information on the total length of the multiple bobbins B may be sent to the control unit 28 from a host computer electrically connected to the control unit 28. Based on such information on the total length, the control unit 28 can acquire position information in a predetermined direction of a predetermined portion of the multiple bobbins B (for example, the front end surface of the bobbin B arranged at the frontmost side). In this case, the control unit 28 corresponds to the position information acquisition unit of the present invention. Alternatively, the winding device 4 may have a sensor (not shown) that detects the position of a predetermined portion of the multiple bobbins B in a predetermined direction. The sensor may transmit information about the position to the control unit 28. In this case, the sensor corresponds to the position information acquisition unit of the present invention.

After acquiring information on the total lengths of the multiple bobbins B, the control unit 28 derives the adjustment amount of the traverse region R based on the information. The adjustment amount may be, for example, a value obtained by dividing the difference between the total length and the reference length by 2. Based on the information on the adjustment amount, the control unit 28 controls the movement drive unit 50 to move the traverse device 22 before the start of the winding operation to adjust the position of the traverse region R at least in a predetermined direction. This makes it possible to optimize the position of the traverse region R in a predetermined direction for the bobbin B attached to the center of the bobbin holder 24 in the front-to-rear direction. The control unit 28 stores the position of the traverse region R optimized in this way as the position (reference position) of the traverse region R at the start of the winding operation. In this case, the traverse region R may be slightly shifted in a predetermined direction with respect to the bobbin B arranged at the frontmost side and the bobbin B arranged at the rearmost side. However, compared to the case where no adjustment is performed at all, for example, the positional deviation in a predetermined direction between the bobbin B arranged at the frontmost side and the traverse region R can be reduced by half. In this way, from an overall perspective, it is possible to suppress extreme misalignment between the traverse region R and the bobbin B before the start of the winding operation. In this way, the movement drive unit 50 is controlled to reduce the misalignment in a predetermined direction between the traverse region R and the bobbin B before the start of the winding operation. Note that the specific timing of the position adjustment of the traverse region R before the start of the winding operation as described above may be, for example, immediately before the yarn Y is hung on the slit S of each bobbin B. Alternatively, the position adjustment may be performed, for example, between the completion of threading the yarn on the slit S and the start of the winding operation.

Next, the position control of the traverse region R in a predetermined direction during the winding operation will be described. The control unit 28 moves the traverse region R during the winding operation relative to the position of the traverse region R at the start of the winding operation (the reference position described above). This position control is performed, for example, simultaneously with the control of the angle adjustment of the contact roller 25 during the winding operation. Two control examples will be described below. Roughly speaking, the first control example (see FIG. 7(b)) is a control example in which the positional relationship between the traverse region R and the bobbin B in a predetermined direction is maintained approximately the same. The second control example (see FIG. 7(c)) is a control example in which the traverse region R is gradually moved toward the slit S in a predetermined direction during the winding operation.

The first and second control examples share the same control procedure. First, the control unit 28 acquires target information regarding the target position (or the movement amount of the support member 26) in a predetermined direction of the traverse region R, taking into account the deflection of the bobbin holder 24 due to the thickening of the package P and the angle adjustment of the support member 26 relative to the deflection. The information may be stored in advance in the RAM of the control unit 28 as a table in which time and position (or the movement amount) are associated. Alternatively, the information may be derived based on a predetermined formula or the like, using the detection results of a sensor (not shown) that detects information regarding the deflection amount of the bobbin holder 24 and the detection results of a sensor (not shown) that detects information regarding the angle of the support member 26. Based on such target information, the control unit 28 appropriately controls the movement drive unit 50, thereby controlling the position of the traverse region R in a predetermined direction during the winding operation.

The specific contents of the target information described above are different between the first control example and the second control example. In the first control example, the target information is determined so that the positional relationship in a predetermined direction between the traverse region R of a certain traverse guide 32 and the bobbin B corresponding to the traverse guide 32 does not change over time (i.e., the relative position in the predetermined direction does not change over time). In other words, the movement drive unit 50 is controlled to reduce the positional deviation in the predetermined direction between the traverse region R and the bobbin B during the winding operation as well as before the start of the winding operation. This suppresses deformation of the package P in the predetermined direction (see FIG. 7(b)). More specifically, for example, as shown in FIG. 8(a), the shape of the end face E1 on one side of the predetermined direction of the package P and the shape of the end face E2 on the other side of the predetermined direction can be made symmetrical in the predetermined direction.

On the other hand, in the second control example, the target information is set so that the traverse region R is gradually shifted at least to one side in the predetermined direction (the side where the slit S is formed) relative to the bobbin B (see the solid arrow in FIG. 7(c)). As a result, the outer peripheral surface of the package P is intentionally shifted slightly to one side in the predetermined direction (see FIG. 7(c)).

Before describing the second control example in more detail, the purpose of implementing the second control example will be described. As described above, generally, as the package P becomes thicker, the radially inner portion of the package P tends to bulge in a predetermined direction. That is, a compressive force caused by the yarn tension in the radially outer portion of the package P acts on the radially intermediate portion (middle layer portion) of the yarn layer, causing a bulge. This causes the end faces E1 and E2 to bulge in a predetermined direction (see FIG. 8(a) etc.). For example, when the positional relationship between the bobbin B and the traverse region R is maintained constant in a predetermined direction from the start to the end of the winding operation (see the two-dot chain line in the package P in FIG. 8(b)), the end faces E1 and E2 bulge to the same extent in the predetermined direction (see FIGS. 8(a) and (b)). In this case, when the length of the traverse region R in the predetermined direction is Lr, the size of the bulge in the predetermined direction (the amount of bulging of the end faces E1 and E2) is dLr, and the length of the yarn layer of the package P in the predetermined direction is Lr2, "Lr2 = Lr + 2 x dLr". As shown in the cross-sectional view of FIG. 8(b) (cross-sectional view of the package P shown in FIG. 8(a)), the radial middle part (middle layer part) of the yarn layer tends to bulge the most in the predetermined direction. Because of the occurrence of such a bulge, when the bobbin B is attached to the bobbin holder 24 so that the slit S is disposed on one side in the predetermined direction, there is a high risk that the yarn Y is likely to protrude from the bobbin B on the other side of the bobbin B in the predetermined direction. Or, even if a serious problem such as the yarn Y protruding from the bobbin B does not occur, if the margin part of the other end of the bobbin B in the predetermined direction is narrow, the following problem may also occur. Generally, the completed packages P are transported while being placed on a tray (not shown) on which the packages P can be placed. Here, the placement surface (not shown) of the tray is formed with a plurality of holes (not shown) into which the ends of the bobbins B on the other side of the predetermined direction can be inserted. In other words, the packages P placed on the tray are transported with the axial direction of each bobbin B approximately parallel to the vertical direction and the end faces of the packages P approximately parallel to the horizontal direction. If each bobbin B is firmly inserted into each hole, the packages P are transported stably. However, if the margin is narrow, the bobbins B are not firmly inserted into the holes, and the packages P are likely to fall over. Also, if the bobbins B are not firmly inserted into the holes, the packages P may shift horizontally on the placement surface during transportation and come into contact with adjacent packages P, resulting in damage to the packages P.

In this regard, by implementing the second control example during the winding operation, it is possible to reduce the bulge of the end face E2 on the other side of the specified direction of the package P. In the second control example, during the winding operation, the control unit 28 (1) moves the traverse device 22 only to one side in the specified direction, or (2) moves the traverse device 22 to one side in the specified direction and then moves it to the other side in the specified direction.

First, the control of (1) above will be described. Immediately after the start of the winding operation or after a predetermined time has elapsed since the start of the winding operation, the control unit 28 controls the movement drive unit 50 to gradually move the traverse device 22 to one side in the predetermined direction (see the solid arrow in FIG. 7(c)). The amount of movement of the traverse device 22 at this time is greater than, for example, the amount of movement of the traverse device 22 in the first control example. More specifically, the traverse region R immediately before the end of the winding operation is shifted a predetermined amount to one side in the predetermined direction with respect to the traverse region R at the start of the winding operation. The predetermined amount may be, for example, the above-mentioned dLr (see the two-dot chain line in the package P in FIG. 8(c)), or may be another value. By such control, it is possible to shift the position of the intermediate layer in the predetermined direction to one side. As a result, the amount of bulge of the end face E1 is increased, and the amount of bulge of the end face E2 is suppressed (see FIG. 8(c)). Therefore, the bobbin B can be firmly inserted into the hole of the tray, and the package P can be transported stably.

Next, the control of (2) above will be described. In the control of (1) above, there is a risk that the radially outer portion of the package P may be significantly biased to one side in the predetermined direction, which may cause the shape of the package P to be distorted. In addition, if the traverse region R moves too far to one side in the predetermined direction, the yarn layer of the package P may protrude from the end face of the bobbin B to one side in the predetermined direction. Therefore, the control of (2) above may be performed instead of the control of (1) above. For example, the control unit 28 first controls the movement drive unit 50 immediately after the start of the winding operation or after a predetermined time has elapsed since the start of the winding operation to gradually move the traverse device 22 to one side in the predetermined direction (see the solid arrow in FIG. 7(c)). After that, the control unit 28 gradually moves the traverse device 22 to the other side in the predetermined direction (see the dashed arrow in FIG. 7(c)). For example, the control unit 28 controls the movement drive unit 50 so that the traverse region R when the weight of the package P is approximately half the target weight is shifted dLr to one side in the predetermined direction from the traverse region R at the start of the winding operation (see the two-dot chain line in the package P in FIG. 8(d)). After that, the control unit 28 controls the movement drive unit 50 so that the position of the traverse region R in the predetermined direction when the weight of the package P reaches the target weight is approximately the same as the position of the traverse region R in the predetermined direction at the start of the winding operation (see the two-dot chain line in FIG. 8(d)). This suppresses the amount of bulging of the end face E2, and suppresses the radially outer portion of the package P from being biased to one side in the predetermined direction compared to the control in (1) above. With such control, ideally, it is most preferable that the amount of bulging of the end face E1 in the predetermined direction is 2×dLr, and the amount of bulging of the end face E2 in the predetermined direction is zero, as shown in FIG. 8(d). However, this is not limited to the above, and by reducing the amount of expansion, it is possible to prevent the margin at the other end of the bobbin B in the specified direction from becoming narrower.

As described above, by moving the traverse device 22 in at least a predetermined direction using the movement drive unit 50, the movement range (traverse region R) of the yarn Y associated with the drive of the traverse guide 32 included in the traverse device 22 can be moved in the predetermined direction. This makes it possible to suppress fluctuations in the relative position between the traverse region R and the bobbin B in the predetermined direction. Therefore, it is possible to suppress problems in the formation of the package P caused by fluctuations in the relative position between the traverse region R and the bobbin B.

In addition, in a configuration in which the traverse region R is fixed to the traverse device 22 (specifically, a blade-type traverse device) as in this embodiment, the provision of the movement drive unit 50 is particularly effective.

The traverse device 22 also includes all of the multiple traverse guides 32. This allows the traverse regions R of all of the traverse guides 32 to be moved by a single movement drive unit 50. Therefore, the structure of the spinning take-up machine 1 can be simplified compared to a configuration that requires multiple movement drive units (not shown).

The movement drive unit 50 also has a ball screw mechanism 51 that can adjust the position of the traverse device 22 in a predetermined direction. This allows the position of the traverse device 22 to be adjusted more precisely than in a configuration in which the traverse device 22 is moved by a propulsive force, such as an air cylinder (not shown).

In addition, by adjusting the angles of the traverse device 22 and the contact roller 25 with the angle adjustment unit 27, the variation in contact pressure between the packages P due to the thickening of the winding of the multiple packages P is suppressed. However, simply adjusting the angle may cause the traverse region R to shift in a predetermined direction relative to the bobbin B, which may cause the shape of the package P to be distorted. In this regard, in this embodiment, the movement drive unit 50 can prevent the traverse region R from shifting in a predetermined direction relative to the bobbin B, effectively preventing the shape of the package P from being distorted.

The movement drive unit 50 is configured to move the support member 26, similar to the angle adjustment unit 27. Therefore, the design can be simplified compared to when the spinning take-up machine 1 is configured to move the traverse device 22 relative to the support member 26.

In addition, the position of the traverse region R is adjusted during the winding operation. Therefore, the shape of the package P can be effectively adjusted or the shape of the package P can be freely changed to a certain extent.

The spinning take-up machine 1 also has a position information acquisition unit (control unit 28 or a sensor not shown). This makes it possible to know the amount of deviation in a specified direction of the traverse region R caused by an error in the length of the bobbin B based on the position information. Therefore, the position information can be used to compensate for the deviation in a specified direction of the traverse region R relative to the bobbin B.

In addition, the positional deviation of the traverse region R relative to the bobbin B caused by an error in the length of the bobbin B can be known in advance by the position information acquisition unit before the start of the winding operation. The control unit 28 controls the movement drive unit 50 before the start of the winding operation based on the positional information. Therefore, the above-mentioned positional deviation can be effectively compensated for.

As the first control example by the control unit 28, the control unit 28 controls the movement drive unit 50 to reduce the positional deviation between the traverse region R and the bobbin B in a predetermined direction. This type of control is particularly effective when it is desired to make the shape of the package P symmetrical in a predetermined direction.

As a second example of control by the control unit 28, the traverse region R is deliberately moved to one side in a predetermined direction during the winding operation. In this way, by allowing an increase in the amount of bulging of the end face E1 on one side of the package P in the predetermined direction (the side on which the bobbin B has a wider margin), the amount of bulging of the end face E2 on the other side of the package P in the predetermined direction (the side on which the bobbin B has a narrower margin) can be reduced accordingly. This makes it possible to prevent the margin on the other side of the bobbin B in the predetermined direction from narrowing, thereby reducing the risk of the yarn Y protruding from the bobbin B, for example.

As described above, the control unit 28 may move the traverse device 22 to one side in the predetermined direction and then to the other side in the predetermined direction during the winding operation. This makes it possible to prevent the margin on the other side of the bobbin B in the predetermined direction from narrowing, while preventing the radially outer portion of the package P from being biased to one side in the predetermined direction.

Next, we will explain modified versions of the above embodiment. However, parts that have the same configuration as the above embodiment will be given the same reference numerals and their explanations will be omitted as appropriate.

(1) The moving drive unit 50 (see FIG. 6) may be provided in a spinning take-up machine 1a as shown in FIG. 9(a). In the spinning take-up machine 1a, two winding devices 4A and 4B having the same function as the winding device 4 of the spinning take-up machine 1 are arranged approximately symmetrically in the left-right direction. For example, the winding device 4A has the same structure as the winding device 4 described above. The winding device 4B has a structure approximately symmetrical in the left-right direction to the winding device 4A. The winding device 4A has a bobbin holder 24A, and the winding device 4B has a bobbin holder 24B. The bobbin holders 24A and 24B are both supported by a cantilever at their rear ends. Also, as shown in FIG. 9(b), a plurality of bobbins B (bobbins BA) attached to the bobbin holder 24A and a plurality of bobbins (bobbins BB) attached to the bobbin holder 24B are arranged in opposite directions to each other in the front-rear direction. That is, the slit S of the bobbin BA is located on the front side, and the slit S of the bobbin BB is located on the rear side. In this configuration, the bobbin holder 24A and the bobbin holder 24B are rotated in opposite directions to each other, so that the winding direction of the yarn Y wound around the bobbin BA and the winding direction of the yarn Y wound around the bobbin BB can be made the same. This allows the above-mentioned package P to be formed by both the winding device 4A and the winding device 4B. Here, if the movement drive unit 50 (see FIG. 6) is not provided, when the bobbin holders 24A and 24B are bent downward as the package P becomes thicker, the following problem may occur due to the fact that the orientation of the bobbin BA and the orientation of the bobbin BB are opposite to each other. That is, in the winding device 4A, the package P may be distorted in a predetermined direction toward the side opposite to the slit S. On the other hand, in the winding device 4B, the package P may be distorted in a predetermined direction toward the slit S side. In this way, there is a risk that packages P of different shapes will be formed by the winding device 4A and the winding device 4B. In this regard, the above-mentioned problem can be avoided by providing the movement drive unit 50 to both the winding device 4A and the winding device 4B of the yarn take-off machine 1a. The above-mentioned first control example may be implemented in the yarn take-off machine 1a. Alternatively, the second control example may be implemented. When the second control example is implemented in the yarn take-off machine 1a, the movement amount of the traverse region R by the movement drive unit 50 may be made different between the winding device 4A and the winding device 4B, taking into consideration that the orientations of the bobbins BA and BB are opposite to each other.

(2) In the above embodiment, the movement drive unit 50 has a ball screw mechanism 51, but this is not limited to the above. For example, the movement drive unit 50 may have a rack and pinion mechanism (not shown). Alternatively, the movement drive unit 50 may be configured to move the traverse device 22 by the pressure of a fluid, such as an air cylinder (not shown).

(3) In the above embodiment, the winding device 4 has an angle adjustment unit 27, but this is not limited to the above. Even in a configuration in which the winding device 4 does not have an angle adjustment unit 27, the positional relationship between the traverse region R and the bobbin B may shift due to the bobbin holder 24 bending as the package P becomes thicker. In such a configuration, it is effective to move the traverse device 22 at least in a predetermined direction using the movement drive unit 50.

(4) In the above embodiments, the bobbin holder 24 is supported at one end, but this is not limited to the above. The bobbin holder 24 may be supported at both ends (i.e., the bobbin holder 24 may be prevented from bending as the package P becomes thicker). Even in this configuration, the positional relationship between the traverse region R and the bobbin B in a specified direction may be shifted due to an error in the overall length of the multiple bobbins B. In this configuration, it is effective to move the traverse device 22 at least in a specified direction by the movement drive unit 50.

(5) In the above embodiment, the control unit 28 controls the movement drive unit 50 to move the traverse device 22 both before the start of the winding operation and during the winding operation, but this is not limited to the above. The control unit 28 may control the movement drive unit 50 only at one of the timings before the start of the winding operation and during the winding operation.

(6) In the above embodiments, the control unit 28 controls the movement drive unit 50 based on various information, but this is not limited to the above. For example, the positional deviation in a predetermined direction between the traverse region R and the bobbin B caused by an error in the overall length of the multiple bobbins B may be compensated for via the operator, as shown below. That is, the operator may obtain information regarding the overall length of the multiple bobbins B in advance by some method. Based on this information, the operator may derive information regarding the amount of movement of the traverse device 22 by the movement drive unit 50, and input this information to an operation unit (not shown). Based on the information input to the operation unit, the movement drive unit 50 may move the traverse device 22.

(7) In the above embodiment, the angle adjustment unit 27 moves the rear end of the support member 26 in the up-down direction, but this is not limited to this. For example, the position of the rear end of the support member 26 in the up-down direction may be fixed, and the angle adjustment unit 27 may be configured to move the front end of the support member 26 in the up-down direction. Alternatively, both the front end and the rear end of the support member 26 may be configured to be individually movable in the up-down direction. Also, the support member 26 is supported by the frame body 20b so that it can swing, but this is not limited to this. The support member 26 may be configured to be linearly moved in a direction perpendicular to the front-rear direction, for example.

(8) In the above embodiment, the traverse device 22 is attached to the support member 26. In other words, when the support member 26 is moved by the movement drive unit 50, the traverse device 22 also moves integrally with the support member 26. However, the traverse device 22 does not necessarily have to be configured to move integrally with the support member 26. In other words, for example, the support member 26 may have a rail member (not shown), and the traverse device 22 may be configured to be movable relative to the support member 26 along the rail. In addition, a movement drive unit (not shown) configured to move the traverse device 22 relative to the support member 26 may be provided.

(9) In the above embodiment, all the traverse guides 32 belonging to the winding device 4 are included in the traverse device 22. In other words, in the above embodiment, all the traverse guides 32 are driven by the traverse motor 33, which is a common driving source. However, this is not limited to this. For example, the same number of traverse devices (not shown) as the number of traverse guides 32 may be provided. In other words, the multiple traverse devices may individually drive the multiple traverse guides 32 by the traverse motors (not shown) provided in each of them. Alternatively, for example, multiple traverse devices each having multiple traverse guides 32 may be provided. In this case, each traverse device may have a traverse motor (not shown). In this configuration in which multiple traverse devices are provided, a movement drive unit (not shown) that individually moves and drives each traverse device in a predetermined direction may be provided. Alternatively, it is not necessary that all of the multiple traverse devices are moved in a predetermined direction. Only some of the multiple traverse devices may be moved and driven by the movement drive unit.

(10) In the above embodiment, the traverse device 22 is a blade-type traverse device. However, the type of the traverse device 22 is not limited to this. For example, the traverse device 22 may be an arm-type traverse device having an arm 61 (illustrated in FIG. 9) for swinging the traverse guide 32 and a motor (not shown) for swinging the arm. In other words, the traverse guide 32 may be attached to the tip of the arm 61 that is driven to swing, and may be configured to traverse the yarn Y by swinging. Even in such a configuration, the traverse region R is fixed to the housing 31. Alternatively, the traverse device 22 may have an endless belt (not shown) to which the traverse guide 32 is fixed, a motor (not shown) for driving the endless belt back and forth, and a plurality of pulleys (not shown) around which the endless belt is wound. In this configuration, it is possible to change the position (and/or length) of the traverse region R in a predetermined direction during the winding operation, but the entire traverse device 22 may also be moved by the movement drive unit 50.

(11) In the above embodiments, the traverse region R is fixed to the housing 31 (i.e., fixed to the traverse device 22), but this is not limited to the above. For example, a movement drive unit may be provided that moves the center position of the traverse region R in a predetermined direction relative to the housing 31.

(12) The present invention is not limited to the above-described yarn take-up machines 1 and 1a, but can also be applied to a yarn winding machine that winds multiple yarns Y onto multiple bobbins B arranged in a predetermined direction.

1. Yarn take-up machine (yarn winding machine)
22 Traverse device 24 Bobbin holder 25 Contact roller 26 Support member 27 Angle adjustment unit 28 Control unit (position information acquisition unit, first control unit, second control unit, third control unit, fourth control unit)
32 traverse guide 34 blade guide 50 movement drive unit 51 ball screw mechanism (linear actuator)
61 Arm B Bobbin P Package R Traverse area S Slit Y Thread

Claims (18)

A yarn winding machine that winds a plurality of yarns onto a plurality of bobbins to form a plurality of packages,
a bobbin holder that is disposed to extend in a predetermined direction and that holds the plurality of bobbins in a line in the predetermined direction;
a plurality of traverse guides for traversing the plurality of yarns along the predetermined direction,
a traverse device including at least one of the plurality of traverse guides and configured to drive the at least one traverse guide;
a movement drive unit that moves the traverse device at least in the predetermined direction ,
The bobbin holder is cantilevered so as to extend at least in a horizontal direction,
a contact roller arranged to extend at least in the predetermined direction and applying contact pressure to the plurality of packages;
an angle adjustment unit configured to adjust the angles of the traverse device and the contact roller with respect to a horizontal direction;
a support member configured to support the traverse device and the contact roller and to be movable by the angle adjustment unit;
The yarn winding machine , wherein the movement drive unit is configured to drive and move the support member at least in the predetermined direction. A control unit is provided,
The control unit is
acquiring target information regarding a target position or a movement amount of the support member in the predetermined direction of a traverse region of the at least one traverse guide, the target information taking into account a deflection of the bobbin holder due to winding thickening of the package and an angle adjustment of the support member with respect to the deflection;
The yarn winding machine according to claim 1 , wherein the movement drive unit is controlled based on the target information. A yarn winding machine that winds a plurality of yarns onto a plurality of bobbins to form a plurality of packages,
a bobbin holder that is disposed to extend in a predetermined direction and that holds the plurality of bobbins in a line in the predetermined direction;
a plurality of traverse guides for traversing the plurality of yarns along the predetermined direction,
a traverse device including at least one of the plurality of traverse guides and configured to drive the at least one traverse guide;
A movement drive unit that moves the traverse device at least in the predetermined direction;
a position information acquiring unit that acquires position information regarding positions of predetermined portions of the plurality of bobbins in the predetermined direction. A second control unit is provided,
The yarn winding machine according to claim 3 , wherein the second control unit controls the movement drive unit based on the position information before a winding operation for winding the plurality of yarns onto the plurality of bobbins is started. The bobbin holder is cantilevered so as to extend at least in a horizontal direction,
a contact roller arranged to extend at least in the predetermined direction and applying contact pressure to the plurality of packages;
The yarn winding machine according to claim 3 or 4, further comprising an angle adjustment unit configured to adjust angles of the traverse device and the contact roller with respect to a horizontal direction. a support member configured to support the traverse device and the contact roller and to be movable by the angle adjustment unit;
The yarn winding machine according to claim 5 , wherein the movement drive unit is configured to drive the support member to move at least in the predetermined direction. A third control unit is provided,
The third control unit is
The yarn winding machine according to any one of claims 1 to 6, characterized in that the movement drive unit is controlled so as to reduce a positional deviation in the predetermined direction between a traverse region of the at least one traverse guide and the bobbin. A yarn winding machine that winds a plurality of yarns onto a plurality of bobbins to form a plurality of packages,
a bobbin holder that is disposed to extend in a predetermined direction and that holds the plurality of bobbins in a line in the predetermined direction;
a plurality of traverse guides for traversing the plurality of yarns along the predetermined direction,
a traverse device including at least one of the plurality of traverse guides and configured to drive the at least one traverse guide;
A movement drive unit that moves the traverse device at least in the predetermined direction;
A third control unit,
The third control unit is
the yarn winding machine, characterized in that the movement drive unit is controlled so as to reduce a positional deviation in the predetermined direction between a traverse region of the at least one traverse guide and the bobbin. The bobbin holder is cantilevered so as to extend at least in a horizontal direction,
a contact roller arranged to extend at least in the predetermined direction and applying contact pressure to the plurality of packages;
The yarn winding machine according to claim 8 , further comprising an angle adjustment unit configured to adjust angles of the traverse device and the contact roller with respect to a horizontal direction. Each bobbin held by the bobbin holder has a slit formed at one end in the predetermined direction through which the thread is wound,
A fourth control unit is provided,
The fourth control unit is
The yarn winding machine according to any one of claims 1 to 9, characterized in that, during a winding operation in which the plurality of yarns are wound onto the plurality of bobbins, respectively, the movement drive unit is controlled to move the traverse device at least to one side in the predetermined direction. The fourth control unit is
The yarn winding machine according to claim 10 , wherein during the winding operation, the traverse device is moved to the one side in the predetermined direction and then moved to the other side in the predetermined direction. A yarn winding machine that winds a plurality of yarns onto a plurality of bobbins to form a plurality of packages,
a bobbin holder that is disposed to extend in a predetermined direction and that holds the plurality of bobbins in a line in the predetermined direction;
a plurality of traverse guides for traversing the plurality of yarns along the predetermined direction,
a traverse device including at least one of the plurality of traverse guides and configured to drive the at least one traverse guide;
a movement drive unit that moves the traverse device at least in the predetermined direction,
Each bobbin held by the bobbin holder has a slit formed at one end in the predetermined direction through which the thread is wound,
A fourth control unit is provided,
The fourth control unit is
the movement drive unit is controlled to move the traverse device only to the one side in the predetermined direction during a winding operation in which the plurality of yarns are wound around the plurality of bobbins, respectively. A yarn winding machine that winds a plurality of yarns onto a plurality of bobbins to form a plurality of packages,
a bobbin holder that is disposed to extend in a predetermined direction and that holds the plurality of bobbins in a line in the predetermined direction;
a plurality of traverse guides for traversing the plurality of yarns along the predetermined direction,
a traverse device including at least one of the plurality of traverse guides and configured to drive the at least one traverse guide;
a movement drive unit that moves the traverse device at least in the predetermined direction,
Each bobbin held by the bobbin holder has a slit formed at one end in the predetermined direction through which the thread is wound,
A fourth control unit is provided,
The fourth control unit is
During a winding operation in which the plurality of yarns are wound around the plurality of bobbins, respectively, the movement drive unit is controlled to move the traverse device at least to the one side in the predetermined direction;
During the winding operation,
controlling the movement drive unit to move the traverse device toward the one side in the predetermined direction so that a traverse area of each of the at least one traverse guide when the weight of each of the plurality of packages becomes half of a target weight is shifted toward the one side in the predetermined direction from the traverse area at the start of the winding operation;
The yarn winding machine is characterized in that it then controls the movement drive unit to move the traverse device to the other side in the specified direction so that the position of the traverse area in the specified direction when the weight of each of the multiple packages reaches the target weight coincides with the position of the traverse area in the specified direction at the start of the winding operation. The yarn winding machine according to any one of claims 1 to 13 , characterized in that a traverse region of the at least one traverse guide is fixed with respect to the traverse device. Each of the plurality of traverse guides is
The yarn winding machine according to claim 14, characterized in that each of the plurality of yarns is configured to be traversed by two blade guides that are driven to rotate in opposite directions to each other, or is attached to an arm that is driven to swing. The yarn winding machine according to any one of claims 1 to 15 , wherein the traverse device includes all of the plurality of traverse guides. The yarn winding machine according to any one of claims 1 to 16 , wherein the movement drive unit includes a linear actuator configured to be able to adjust the position of the traverse device in the predetermined direction. A first control unit is provided,
The yarn winding machine according to any one of claims 1 to 17 , wherein the first control unit controls the movement drive unit during a winding operation in which the plurality of yarns are wound onto the plurality of bobbins, respectively.

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