JP2000007219A - Vane traversing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vane traversing device capable of yielding a properly conical package in a fine shape. SOLUTION: A vane traversing device includes two thread guide vanes 10a, 10b rotated in mutual opposition, an elliptical driven gear 14 provided at the inputs of the thread guide vanes 10a, 10b, and an elliptical power gear 16 engaged with the driven gear 14 and provided at the output of a driving motor 21, wherein the thread guide vanes 10a, 10b are pulsation rotated via gears 14, 16 to change the traversing speed in the axial direction of a conical package 2 and the gears 14, 16 are set to be engaged with each other so that the traversing speed is faster at the small diameter side 2a of the package 2 and slower at the large diameter side 2a. In this way, there are less winding amount of thread 1 at the small diameter side 2a of the package 2 and more winding amount at the large diameter side 2b, yielding a properly conical package 2 in a fine shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade traverse device for rotating two yarn guide blades in opposite directions, and more particularly to a blade traverse device used when winding a yarn as a cone-shaped package.

[0002]

2. Description of the Related Art In a blade traverse device, two superposedly arranged yarn guide blades are rotated in reverse at a constant speed to each other, and a yarn wound on a package is alternately transferred to the yarn guide blades and the yarn guide blades are guided. The yarn wound on the package is reciprocated in the axial direction by being guided by a yarn guide plate arranged along the movement locus of the blade.

As an improvement of this type of traverse device, there is known a blade traverse device described in Japanese Patent No. 2560918. This blade traverse device makes the number of the two yarn guide blades stacked vertically different, and makes their rotation speeds different by the reciprocal of the number ratio, so that the traverse speed of the forward path and the return path, that is, the forward path and the return path, This is to make the number of winds different.

[0004]

By the way, in such a blade traversing device, the yarn guide blades that substantially traverse the yarn have different rotation speeds between the upper and lower blades, but each of the blades has a constant speed. Due to rotation, the traverse speed was constant at the right and left ends of the package. Therefore, even if it is attempted to form a cone-shaped package using the blade traverse device, it is difficult to obtain an appropriate package having a good shape.

That is, when a cone-shaped package is formed, the traverse speed is increased on the small diameter side to reduce the amount of yarn winding, and on the large diameter side, the traverse speed is decreased to increase the yarn winding amount. However, in the blade traverse device, it is difficult to obtain a cone-shaped package because the traverse speed does not change between the large-diameter side and the small-diameter side of the package.

An object of the present invention, which has been made in view of the above circumstances, is to provide a blade traversing device capable of obtaining a well-shaped and appropriate cone-shaped package.

[0007]

Means for Solving the Problems (1) A blade traverse device according to the present invention created to achieve the above object comprises two yarn guide blades which are rotated in opposite directions to each other, and an input of the yarn guide blade. And an elliptical driven gear meshed with the driven gear and provided at an output portion of the drive motor. The gear pulsatingly rotates the yarn guide blades so that the traverse speed is increased. Is varied in the axial direction of the cone-shaped package, and the meshing of the gears is set such that the traverse speed is faster on the small diameter side of the package and slow on the large diameter side.

According to the present invention, the traverse speed is varied in the axial direction of the cone-shaped package by pulsatingly rotating the yarn guide blades by using the elliptical driving gear and the driven gear, and the driving and driven gears are driven. The meshing is set so that the traverse speed is fast on the small diameter side of the package and slow on the large diameter side, so the winding amount of the yarn is small on the small diameter side of the package and large on the large diameter side. Package is obtained.

(2) When the gears mesh with each other, the minimum traverse speed of the yarn guide blade is located on the path from the large diameter side to the small diameter side of the cone-shaped package, and the maximum traverse speed is increased from the small diameter side to the large diameter. It may be set so as to be located on the path toward the radial side.

In this case, the average of the traverse speed of the path from the large-diameter side to the small-diameter side of the package is lower than the average of the traverse speed of the path from the small-diameter side to the large-diameter side. The length of the yarn wound on the path from the small diameter side to the large diameter side is longer than the length of the yarn wound on the path from the small diameter side to the large diameter side. More than the number of winds in the path.
As a result, the yarn unwinding property is improved.

This point will be described in more detail with reference to FIGS.

In general, if the number of windings (the number of coils) at the time of winding is too large, the compression inside the package proceeds as the winding diameter increases, and as shown in FIG. It becomes a bulge package in which both ends of the package collapse and bulge. At present, the number of windings for preventing this and obtaining an appropriate package having the shape shown in FIG. 6B is empirically determined by the yarn count and material.

On the other hand, FIGS. 7 (a) and 7 (b) illustrate the number of winds from the viewpoint of ease of unwinding. FIG. 7A shows a package having a small number of windings, and the curvature R of the yarn is small at the unwinding point where the yarn separates from the package surface. On the other hand, the package shown in FIG. 7B is a package having a large number of winds, and has a large curvature R at the unwinding point.

When these are compared, FIG.
In the case of (a), since the yarn is easily released from the package surface, the rising of the unwinding balloon is good, the frictional contact with the yarn wound below is small, and the lower yarn is hard to move. In the case of FIG. 7 (b) having a large curvature R, there is a lot of frictional contact with the yarn wound below, so that not only the rise of the unwinding balloon is bad, but also the unwound yarn rotates due to friction with the package surface. The lower layer yarn moves in the unwinding direction because it moves and entrains the fluff or the like of the lower layer yarn.

[0015] The lower layer yarn thus moved is coupled with the fact that the coil is easily loosened because the package has a tapered cone winding, a large number of windings, and a small twill angle.
It is easy to cause entanglement with the unwound yarn. Here, FIG.
When the angle θ is increased as much as possible, the curvature R is reduced, so that the unwinding property is improved. Although the angle θ can be increased by adjusting the number of winds, the number of winds is restricted in order to obtain a package having a proper shape as described above.

When the unwinding point moves from the large-diameter side to the small-diameter side, that is, when the unwinding point moves in the same direction as the yarn drawing-out direction, the smaller the number of windings, the larger the angle θ, and When the unwinding point moves from the small-diameter side to the large-diameter side contrary to the drawing direction, the angle θ increases as the number of winds increases. Therefore, when winding, the number of winds in the path from the large-diameter side to the small-diameter side is larger than the number of winds in the path from the small-diameter side to the large-diameter side.

Considering the above-mentioned circumstances in view of the above circumstances, according to the above-mentioned invention, the package number can be changed by changing the ratio of the number of winds in the forward path and the return path without changing the total number of winds in the round trip. Can be wound while maintaining the shape of the yarn properly and with improved yarn unwinding properties.

(3) The above-mentioned blade traversing device is
A sensor for detecting the rotation speed of the package; and a control unit for adjusting the rotation speed of the drive motor in accordance with the output of the sensor. The control unit determines the relationship between the rotation of the package and the rotation of the yarn guide blade. It may be maintained regardless of the rotational speed of the package.

In this way, when the package is driven to rotate in contact with the friction drum, even if there is a slip between the friction drum and the package at the time of starting rotation after piecing, the package is controlled by the sensor and the control unit. Since the relationship between the rotation of the yarn guide blade and the rotation of the yarn guide blade is maintained, an appropriate package without turbulence can be formed.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram showing a blade traverse device according to the present embodiment used as a traverse mechanism of an automatic winder.

The automatic winder rewinds the yarn 1 unwound from a yarn supplying bobbin (not shown) into a cone-shaped package 2 while cutting and removing defective portions of the yarn 1.
The left and right ends of the bobbin 3 of the cone-shaped package 2 are rotatably supported by a bobbin holder 4, and are driven to rotate in contact by a friction drum 5. Both ends of the friction drum 5 are supported by bearings 6.
It is rotationally driven by a winding motor 7, a belt 8, and the like.
In the vicinity of the friction drum 5, a blade traverse device 9 for traversing the yarn 1 wound on the package 2 is arranged.

The blade traverse device 9 includes two yarn guide blades 10 that are rotated in opposite directions by a gear mechanism (not shown).
a, 10b, and a yarn guide plate 12 having a guide portion 11 formed in a mountain shape along the movement trajectory of the yarn guide blades 10a, 10b. 1, the yarn guide blade 10a,
The yarns are alternately delivered to 10b and guided by the guide portion 11 of the yarn guide plate 12 to traverse. Yarn guide blade 10
The rotation shafts 13a and 13b of the motors a and 10b are slightly displaced from each other, and are reversely rotated at the same speed by a known gear mechanism (not shown).

An elliptical driven gear 14 is provided at the input portion of the gear mechanism of the thread guide blades 10a and 10b so that its rotary shaft 15 is eccentric. The driven gear 14 is meshed with an elliptical driving gear 16 with its rotary shaft 17 eccentric. The elliptical shapes of the driven and driven gears 14 and 16 are formed so as to always mesh. The driving gear 16 is driven to rotate by a drive motor 21 via a power transmission mechanism 20 including a pulley 18 and a belt 19. The power transmission mechanism 20 may be a sprocket and a chain, a gear train, or the like.

According to this configuration, when the drive motor 21 is rotated at a constant speed, the driven gear 1
4 rotates in a pulsating manner. Here, the pulsating rotation is
This means that the angular velocity of the driven gear 14 changes during one rotation. Specifically, the angular velocity of the driven gear 14 is shown in FIG.
As shown in FIG.
4 when the short-diameter portion 14b meshes with the short-diameter portion 14b of the driven gear 14, and becomes minimum when the short-diameter portion 16b of the driving gear 16 meshes with the long-diameter portion 14a of the driven gear 14.

When the driven gear 14 pulsates and rotates, the yarn guide blades 10a and 10b pulsate and rotate in opposite directions at the same speed, and the traverse speed of the yarn 1 fluctuates along the axial direction of the package 2. become. Specifically, the gear ratio is set so that one reciprocating traverse in which the yarn 1 travels from the small-diameter end 2a to the large-diameter end 2b of the package 2 and returns to the small-diameter end 2a corresponds to one rotation of the driven gear 14. Is set so that a maximum traverse speed and a minimum traverse speed are generated once during one reciprocating traverse of the yarn 1.

More specifically, in the present embodiment, as shown in FIG.
When the long diameter portion 16a of the driving gear 16 meshes with the short diameter portion 14b of the driven gear 14, the traverse speed is maximized, and the yarn 1 is positioned at the large diameter end 2b of the package 2. The meshing of the driven gear 14 and the driving gear 16 is set such that the short diameter portion 16b of the driving gear 16 meshes with the long diameter portion 14a of the driven gear 14 to minimize the traverse speed. Thereby, the twill angle θ of the package 2
In the figure, the small-diameter end 2a is maximum and the large-diameter end 2b is minimum.

According to the present embodiment having the above configuration,
By using the elliptical driving gear 16 and the driven gear 14, the yarn guide blades 10 a and 10 b are pulsated and rotated to change the traverse speed in the axial direction of the cone-shaped package 2, and the driving gear 16 and the driven gear 14 Since the meshing is set so that the traverse speed is high at the small-diameter end 2a of the package 2 and slow at the large-diameter end 2b, the winding amount of the yarn 1 is small at the small-diameter side of the package 2 and large at the large-diameter side. Thus, an appropriate cone-shaped package 2 having a good shape can be obtained.

As shown in FIG. 2, in the blade traverse device 9, when the yarn 1 is traversed from the small-diameter end 2a to the large-diameter end 2b, the traverse speed gradually decreases, From the radial end 2b to the small diameter end 2
The traverse speed gradually increases when the traverse is performed, but since the rate of change of the traverse speed is the same, the pattern of the twill angle of the yarn 1 wound from the small-diameter end 2a to the large-diameter end 2b is the same. The pattern of the twill angle of the yarn 1 wound from the large-diameter end 2b to the small-diameter end 2a becomes the same.

Therefore, when unwinding the yarn 1 of the cone-shaped package 2 that has been wound up in the next step, the small-diameter end 2
The pattern of the twill angle of the yarn 1 unwound from the large diameter end 2b to the small diameter end 2a is identical to the pattern of the twill angle unwound from the large diameter end 2b to the small diameter end 2a. However, the unwinding property is deteriorated. That is, in order to improve the unwinding property, the twill angle of the yarn 1 when unwinding from the small-diameter end 2a to the large-diameter end 2b is unwound from the large-diameter end 2b to the small-diameter end 2a. It is desired to make the overall angle smaller than the helix angle of the yarn 1 when the yarn is wound. However, in the above embodiment, the helix angle pattern from the small-diameter end 2a to the large-diameter end 2b and the large-diameter end 2b Since the trajectory pattern from the end to the small diameter side end 2a is the same, there is room for improvement in improving the unwinding property.

This can be described as follows using an average of the traverse speeds in an easy-to-understand and virtual manner. That is, in the previous embodiment, the traverse speed is actually the package 2 as shown by the helix angle θ in FIG.
However, since the maximum traverse speed is the small-diameter end 2a and the minimum traverse speed is the large-diameter end 2b, the maximum traverse speed is changed from the small-diameter end 2a to the large-diameter end 2b. The average traverse speed and the average traverse speed from the large-diameter end 2b to the small-diameter end 2a are the same.

Accordingly, assuming that the yarn 1 is wound at the average traverse speed, the helix angle is virtually represented, as shown in FIG. 4, from the small-diameter end 2a to the large-diameter end 2b. Twill angle of the yarn 1a to be wound and the large diameter side end 2b
And the yarn 1b wound around the small diameter side end 2a has the same twill angle. Considering that the yarn 1 of the package 2 is unwound, as shown in FIG.
When the yarn 1b wound around the small-diameter end 2a is unwound from the small-diameter end 2a to the large-diameter end 2b (in a direction in which unwinding is difficult), the twill angle of the yarn 1b and the small-diameter end 2a From the large-diameter end 2b to the small-diameter end 2a (the direction in which the yarn 1a is wound around the large-diameter end 2b).
Since the helix angle of a becomes the same, the unwinding property of the former yarn 1b deteriorates. In order to improve the unwinding property of the yarn 1b, the twill angle of the former yarn 1b may be reduced as shown by the one-dot chain line 26.

Therefore, the present inventor has shown in FIG.
The maximum traverse speed is increased from the small diameter end 2a to the large diameter end 2a.
b, and the engagement position between the driven gear 14 and the driving gear 16 is set such that the minimum traverse speed is shifted along the path from the large-diameter end 2b to the small-diameter end 2a. Was invented. In the case of this embodiment, the driving gear 16 and the driven gear 14 are, as shown in FIG. 5, at the small-diameter end 2 a immediately before the long diameter portion 16 a of the driving gear 16 and immediately before the short diameter portion 14 b of the driven gear 14. At the large-diameter end 2b, the portion immediately before the short-diameter portion 16b of the driving gear 16 and the portion immediately before the long-diameter portion 14a of the driven gear 14 are meshed.

By setting the meshing of the gears 14 and 16 in this manner, the average of the traverse speed from the small-diameter end 2a to the large-diameter end 2b (indicated by a broken line 23 in FIG. 5) is increased. The average of the traverse speed from the end 2b to the small diameter side end 2a (indicated by the dashed line 24 in FIG. 5) is
Be faster. Therefore, those average traverse speeds 23, 2
Assuming that the yarn 1 has been wound up at 4, the yarns 1 a, 1
b, the small-diameter end 2a to the large-diameter end 2b
As shown by the broken line 25 in FIG. 5, the yarn 1a wound around the yarn 1a has a larger twill angle, a shorter yarn length, a reduced number of windings, and a yarn 1b wound from the larger diameter end 2b to the smaller diameter end 2a. As shown by the one-dot chain line 26 in FIG. 5, the twill angle becomes smaller, the yarn length becomes longer, and the number of winds increases.

In the package 2, the yarn 1a (indicated by a broken line 25 in FIG. 5) wound from the small-diameter end 2a to the large-diameter end 2b is unwound from the large-diameter end 2b to the small-diameter end 2a. The yarn 1b (indicated by the dashed-dotted line 26 in FIG. 5) wound from the large-diameter end 2b to the small-diameter end 2a is unwound from the small-diameter end 2a to the large-diameter end 2b. become. Accordingly, in the package 2, as shown in FIG. 3, when the yarn 1a is unwound from the large-diameter end 2b to the small-diameter end 2a which is easy to unwind, the twill angle of the yarn 1a is indicated by a broken line 25 (dashed line 25 in FIG. 5). ), And the unwinding property further increases,
When the yarn 1b is unwound from the small-diameter end 2a, which is difficult to unwind, to the large-diameter end 2b, the helix angle of the yarn 1b becomes smaller as indicated by a dashed line 26 (corresponding to the dashed line 26 in FIG. 5). Good shuttability.

Also in this embodiment, as shown in FIG. 5, the maximum traverse speed is set between the small-diameter end 2a and the central portion 2c of the package 2, and the minimum traverse speed is set to the minimum. Since it is set between the large-diameter end 2b and the center 2c, similarly to the previous embodiment shown in FIG. 2, the helix angle θ of the small-diameter end 2a is smaller than the helix angle θ of the large-diameter end 2b. And the winding amount of the small-diameter side yarn 1 becomes smaller than the winding amount of the large-diameter side yarn 1, so that an appropriate cone-shaped package 2 having a good shape can be obtained. That is, in the present embodiment, in addition to the effect of being able to obtain an appropriate cone-shaped package 2 having a good shape similarly to the previous embodiment, it is possible to obtain the package 2 having a good unwinding property. It can also be effective.

Further, as shown in FIG. 1, a sensor 27 for detecting the rotational speed of the package 2 is arranged near the bobbin holder 4 of the package 2, and
7, a control unit 28 for adjusting the rotation speed of the drive motor 21 in accordance with the output of the control unit 7 is provided, and the control unit 28 determines the relationship between the rotation of the package 2 and the rotation of the yarn guide blades 10a and 10b by the rotation speed of the package 2. Alternatively, a predetermined relationship may be maintained.

In this way, when the automatic winder temporarily stops the friction drum 5 and the package 2 at the time of cutting and removing the defective portion of the yarn 1, connects the yarn 1, and then restarts the stopped friction drum 5, the friction is reduced. A slip occurs between the drum 5 and the package 2 and the package 2
Even if the rotation of the package does not increase, the relationship between the rotation of the package 2 and the rotation of the yarn guide blades 10a and 10b is maintained in a predetermined relationship by the sensor 27 and the control unit 28. 2 can be formed.

That is, in an ordinary automatic winder, a traverse drum (not shown) provided with traverse grooves is brought into contact with the package 2 and is driven to rotate. If a slip occurs between the traverse drum and the package 2 when the traverse drum is restarted, the traverse occurs because only the traverse is performed without the rotation of the package 2 increasing. .

In the present embodiment, on the other hand, the rotation of the package 2 and the rotation of the yarn guide blades 10a and 10b are always maintained in a predetermined relationship by the sensor 27 and the control unit 28. Even if slippage occurs between the friction drum 5 and the package 2, an appropriate package 2 without turbulence can be formed.

[0041]

As described above, according to the blade traverse device of the present invention, the following excellent effects can be exhibited.

(1) According to the blade traversing device of the first aspect, an appropriate cone-shaped package having a good shape can be obtained.

(2) According to the blade traversing device of the second aspect, a cone-shaped package excellent in unwinding property can be obtained.

(3) According to the blade traversing device of the third aspect, a cone-shaped package without turbulence at the time of splicing can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic view of a blade traverse device according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a driving and driven gear of the blade traverse device, an instantaneous state of a yarn wound around a package, and a traverse speed.

FIG. 3 is an explanatory diagram showing a state of unwinding a yarn wound around a package.

FIG. 4 is an explanatory diagram showing the relationship between the driving and driven gears of the blade traverse device, the average state of the yarn wound around the package, and the traverse speed.

FIG. 5 is an explanatory diagram showing the relationship between the driving and driven gears of the blade traverse device according to the second embodiment of the present invention, the average state of the yarn wound around the package, and the traverse speed.

FIG. 6 is an explanatory diagram showing the relationship between the number of winds and collapse of the package (bulge). FIG. 6 (a) is an explanatory diagram of a bulge package having an excessive number of winds, and FIG. It is explanatory drawing of the package whose number is proper.

FIG. 7 is an explanatory diagram showing a relationship between the number of winds and the unwinding property of the yarn, and FIG. 7A is an explanatory diagram showing a state where the yarn is unwound from a package having a small number of winds. (b) is an explanatory view showing a state where the yarn is unwound from a package having a large number of winds.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thread 2 Package 2a Small-diameter end 2b Large-diameter end 10a Thread guide blade 10b Thread guide blade 14 Follower gear 16 Drive gear 21 Drive motor 27 Sensor 28 Control unit

Claims (3)

[Claims] 1. A yarn guide blade which is rotated in the opposite direction to each other, an elliptical driven gear provided at an input portion of the yarn guide blade, and an output portion of a drive motor meshed with the driven gear. And a pulsating rotation of the yarn guide blade by the gear to change the traverse speed in the axial direction of the cone-shaped package, and the traverse speed is faster on the small diameter side of the package and on the large diameter side. The meshing of the gears is set so as to be delayed by the blade traverse device. 2. The meshing of the gears is such that the minimum traverse speed by the yarn guide blade is located on a path from the large diameter side to the small diameter side of the cone-shaped package, and the maximum traverse speed is from the small diameter side to the large diameter side. The blade traverse device according to claim 1, wherein the blade traverse device is set so as to be located on a path to which the blade goes. 3. A sensor for detecting the rotation speed of the package, and a control unit for adjusting the rotation speed of the drive motor in accordance with the output of the sensor, the control unit controlling the rotation of the package and controlling the rotation of the yarn guide blade. 2. The blade traverse device according to claim 1, wherein the relationship with rotation is maintained regardless of the rotation speed of the package.