JP2000118870A - Bobbin holder and thread strip take-up device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower a third dangerous speed to a climable low speed region and set a usage rotation speed region between the third and fourth critical speeds by axially dividing a rotation cylinder as a plurality of portions. SOLUTION: A bobbin holder 4 has a rotation cylinder 8 fixed to a driving shaft 3 and a bobbin grabbing means 9 provided on its outer periphery. The rotation cylinder 8 is axially divided as a plurality of portions. The respective divided portions 8a, 8b are mechanically and perfectly separated on the both sides of a space expanding vertically in relation to the driving shaft 3, and are independently fixed to different portions of the driving shaft 3. The bobbin grabbing means 9 is formed by alternately arranging cylindrical spacers 9a and elastic rings 9b. A pressing mechanism 11 having a spring 10 energizes a front lid 12 axially, the elastic ring 9b between the cylindrical spacers 9a is pressed axially and swelled in the outer diameter direction, and a bobbin 13 is held from inner peripheral surface side. This allows super-high-speed take-up and can improve productivity of a thread strip package.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin holder for winding a yarn at a high speed, a yarn winding device using the bobbin holder, and a method for manufacturing a yarn package using the winding device.

[0002]

2. Description of the Related Art In recent years, in order to improve productivity and reduce costs, a winding device for winding a yarn such as a synthetic fiber has a particularly high speed winding speed, for example, a high speed winding speed exceeding 6,000 m / min. Has been realized.

[0003] However, recently, there is a demand for further improvement in productivity and cost reduction, and further high-speed winding technology is being studied.

In order to achieve high-speed winding, it is necessary to rotate the bobbin holder at a high speed. However, in the conventional high-speed winding, for example, at about 6,000 m / min, secondary and tertiary danger in the bobbin holder. The operating speed range is set between the speeds. Normally, the primary critical speed is mainly governed by the vibration state or vibration energy of the tip of the drive shaft of the bobbin holder, and the secondary critical speed is mainly an annular support provided for supporting the drive shaft so as to be able to rotate at high speed. The third critical speed is mainly governed by the vibration state or vibration energy of the rotating cylinder fixed to the drive shaft and having the bobbin gripping means on the outer periphery. Therefore, in the conventional high-speed winding,
By setting the secondary critical speed as low as possible, the rotational speed is set to primary and secondary
The next critical speed can be easily overcome, the third critical speed is set as high as possible, and the usable rotational speed range from the second critical speed to the third critical speed is as wide as possible, and It is designed to be used as fast as possible.

[0005]

However, for example,
In a bobbin holder on which a bobbin having an outer diameter of 125 mm and a total length of 1,200 mm is mounted, it is no longer possible to achieve high-speed winding at a winding speed of about 8,000 m / min with the structure of the conventional device. That is, as described above, in order to achieve high-speed winding in the conventional apparatus, it is necessary to increase the third critical speed. The third critical speed Nc3 is generally Nc3∝ (D / L ² ) √ ( E / ρ)
(D, L, E, and ρ are D of the bobbin holder, respectively, outer diameter,
L: full length, E: elastic modulus, ρ: specific gravity), D, L
Is determined by the size of the bobbin to be mounted, and E and ρ are substantially constant values for the steel material used for the bobbin holder. Therefore, it is physically very difficult to raise this to realize high-speed winding.

SUMMARY OF THE INVENTION In view of the above situation, the object of the present invention is to basically reduce the tertiary dangerous speed to a low speed region capable of overcoming the tertiary dangerous speed, and to reduce the operating speed range between the tertiary and quaternary dangerous speeds. An object of the present invention is to provide a bobbin holder and a yarn winding device that can be set, and to enable ultra-high-speed winding that cannot be achieved by the related art.

[0007]

In order to solve the above-mentioned problems, a bobbin holder according to the present invention is a bobbin holder having a rotary cylinder fixed to a drive shaft and bobbin gripping means provided on the outer periphery of the rotary cylinder. The rotating cylinder is divided into a plurality of portions in the axial direction.

[0008] The divided portions of the rotating cylinder may be mechanically separated from each other or may be mechanically connected to each other. In the case of mechanical connection, it is necessary that the second moment of area of the connecting portion be smaller than the second moment of area of the divided portions located on both sides of the connecting portion. Further, the bobbin holder can be configured so that a plurality of bobbins can be mounted.

A yarn winding device according to the present invention comprises a drive source, a drive shaft rotated by the drive source, and the above-described bobbin holder.

In this yarn winding device, the operating speed range of the bobbin holder is set between the third and fourth critical speeds. At this time, it is preferable that the third critical speed of the bobbin holder is set to less than 6,000 rpm.

[0011] A method of manufacturing a yarn package according to the present invention is characterized in that the yarn is wound on a bobbin mounted on a bobbin holder using such a winding device to form a package. Become.

In the present invention as described above, the rotary cylinder of the bobbin holder has a structure divided in mass in the axial direction, so that the third order of the bobbin holder is mainly governed by the vibration state or vibration energy of the rotary cylinder. Dangerous speed is greatly reduced. As a result, the tertiary critical speed can be set in a low-speed region where the vehicle can easily get over at the time of high-speed winding, for example, a low-speed region of less than 6,000 rpm, and the speed region between the tertiary and fourth critical speeds is actually used It becomes possible to be an area. The fourth-order critical speed is mainly governed by the vibration state or vibration energy at the root of the drive shaft. However, the fourth-order critical speed is usually in an extremely high region, for example, a high region of 30,000 rpm or more. As a speed range, it becomes possible to an extremely high speed range,
Ultra high speed winding is realized.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with preferred embodiments.

FIG. 1 shows a yarn winding device provided with a bobbin holder according to one embodiment of the present invention, FIG. 2 shows its basic characteristics, and FIG. 3 shows its detailed characteristics of the critical speed. I have. 4 shows an example of a conventional device for comparison, FIG. 5 shows its basic characteristics, and FIG. 6 shows its detailed characteristics of the critical speed.

In FIG. 1, reference numeral 1 denotes an entire yarn winding device. The winding device 1 includes a motor 2 as a drive source.
And a drive shaft 3 connected to the output shaft 2 a of the motor 2, and a bobbin holder 4 rotated by the drive shaft 3. The motor 2 is incorporated in the housing 5 and has a rotor 2b and a stator 2c.

The drive shaft 3 is rotatably supported by bearings 7a, 7b, 7c inside an annular support 6 fixed to the housing 5.

The bobbin holder 4 has a rotating cylinder 8 fixed to the drive shaft 3 and bobbin gripping means 9 provided on the outer periphery of the rotating cylinder 8. The rotating cylinder 8 is divided into a plurality in the axial direction, and is divided into two in this embodiment. The divided portions 8a and 8b of the rotary cylinder 8 are completely separated mechanically completely by a space extending perpendicularly to the drive shaft 3, and the divided portions 8a and 8b are independently driven by the drive shaft 3 respectively. The different parts are fixed.

The bobbin gripping means 9 comprises cylindrical spacers 9a and elastic rings 9b alternately arranged. By pressing the front lid 12 in the axial direction by the pressing mechanism 11 having the spring 10, the elastic ring 9 b between the cylindrical spacers 9 a is pressed in the axial direction and swells in the outer diameter direction. It can be held from the inner peripheral surface side. In the present embodiment, a plurality of bobbins 13 are arranged and mounted in the axial direction.
Eight bobbins having a length of 25 mm and a length of 150 mm are arranged in the axial direction, and the total length is about 1,200 mm.

Reference numeral 14 denotes a roller bale holder having a built-in roller bale (not shown) which is brought into pressure contact with the outer peripheral surface of the bobbin 13 or the outer peripheral surface of the yarn (or the yarn package) being wound on the bobbin 13. Is shown. The roller bale holder 14 is retracted in the radial direction of the bobbin holder 4 together with the moving body 15 as the package becomes thicker.

On the other hand, the conventional winding device shown in FIG. 4 for comparison is substantially shown in FIG. 1 except that it has a bobbin holder 22 having a rotating cylinder 21 that is not divided in the axial direction. It has the same configuration as the winding device. Therefore, the remaining portions in FIG. 4 are denoted by the same reference numerals as in FIG.

FIGS. 2 and 5, and FIGS. 3 and 6 show a comparison of characteristics between the winding device according to the present invention shown in FIG. 1 and the conventional winding device shown in FIG. The dimensional conditions for comparison are shown in FIG.
And FIG. 4 (unit: mm).

As shown in FIGS. 2 and 3, in the winding device according to the present invention shown in FIG. 1, the primary critical speed mainly governed by the vibration state or vibration energy at the tip of the drive shaft 3 (Nc1) appears at a rotational speed (spindle rotational speed) of about 1,100 rpm, and is mainly governed by the vibration state or vibration energy of the annular support 6.
The next critical speed (Nc2) appears at a rotational speed of about 3,250 rpm, and is mainly determined by the vibration state or vibration energy of the rotating cylinder 8 fixed to the drive shaft 3 and having the bobbin gripping means 9 on the outer periphery. The critical speed (Nc3) appears at a rotational speed of about 5,750 rpm, and mainly depends on the drive shaft 3
A fourth-order critical speed (Nc4) governed by the vibration state or vibration energy on the root side of appears at a rotational speed of about 30,500 rpm. That is, the third critical speed (about 21,000 rpm shown in FIG. 5) in the conventional device is greatly reduced to about 5,750 rpm.

Therefore, in the case of a high-speed winding exceeding 6,000 m / min, it is possible to easily and quickly get over to the third critical speed, and to use the rotating speed range (winding). Use range) is the fourth critical speed (Nc
It is greatly increased up to the part immediately before the rising part of 4). In the illustrated example, the upper limit of the operating rotational speed range is about 10,000 m / min (mechanical max) at the winding speed of the yarn.
It is possible to achieve ultra-high-speed winding, which could not be achieved with the conventional device.

On the other hand, as shown in FIGS. 5 and 6, in the conventional winding device shown in FIG. 4, the primary critical speed (Nc
1) appears at a rotational speed of about 1,150 rpm, a secondary critical speed (Nc2) appears at a rotational speed of about 3,450 rpm, and a tertiary critical speed (Nc3) at about 21,000 rpm
It appears in the number of revolutions. The winding use range is between the second and third critical speeds, and the maximum winding speed of the yarn in the illustrated example is at most about 7,000 m / min as the mechanical maximum speed (mechanical max). It is suppressed.

As described above, in the yarn winding device according to the present invention shown in FIG. 1, the rotary cylinder 8 of the bobbin holder 4 is divided into the portions 8a and 8b in the axial direction, so that the rigidity of the entire rotary cylinder is increased. Is reduced, the critical speed (the third-order critical speed Nc3) of the bobbin holder 4 as a whole is greatly reduced, and the winding use range can be set between the third- and fourth-order critical speeds. The practically possible winding speed is greatly increased, and an ultra-high speed winding of 9,000 m / min or more is possible.

In the apparatus shown in FIG. 1, the space between the divided rotary cylinders 8a and 8b (the portion 5 mm in the figure) is further expanded and fixed to the drive shaft to reduce the third critical speed (Nc3). It can be even lower. By dividing the rotating cylinder, the rigidity of the entire rotating cylinder is
It is controlled by the shaft connecting the divided rotating cylinders. In other words, the rigidity of the entire rotating cylinder can be further reduced by fixing the divided rotating cylinders to the shaft at intervals and increasing the portion having a low second moment of area. As described above, the tertiary critical speed is governed by the vibration state or vibration energy of the rotating cylinder. Therefore, Nc3 can be reduced by reducing the rigidity of the rotating cylinder as a whole.

Here, if the gap between the divided rotary cylinders is too large, the bobbin gripping means 9 falls into the gap and cannot grip the bobbin. Therefore, as shown in FIG. 7, the outer peripheral end of the rotating cylinder 31b on the motor 2 side is extended, or the outer peripheral rear end of the rotating cylinder 41a on the opposite motor 2 side is extended as shown in FIG. It is also preferable to reduce the gap in the above to prevent the bobbin gripping means from dropping into the gap, reduce the rigidity of the entire rotating cylinder, and reduce Nc3. The remaining portions in FIGS. 7 and 8 are substantially the same as those in the device shown in FIG.

In the present invention, dividing the rotating cylinder into a plurality of portions in the axial direction means that the rotating cylinder is not only mechanically divided as described above but also mechanically connected to each other. This also includes mass division. To divide by mass mechanically coupled to each other,
For example, as shown in FIG.
c, and although they are mechanically connected to each other, the rotating cylinder 51 is substantially divided into portions 51a and 51b in the axial direction, and a reduced diameter portion 51c having a smaller second moment of area than both sides is provided. It means to provide a part. By doing so, it is possible to obtain the same performance as the device shown in FIG. 1 with respect to the third critical speed. The remaining parts in FIG. 9 are substantially the same as those in the apparatus shown in FIG. 1, and thus are denoted by the same reference numerals as in FIG.

By using the winding device shown in each of the above embodiments to wind the yarn, it has not been possible to achieve the prior art.
Ultra-high speed winding of 000 m / min or more becomes possible, and a desired yarn package can be manufactured with high productivity and low cost.

Although the above embodiments have described the case where the rotary cylinder is divided into two parts in the axial direction, the present invention includes a case where the rotary cylinder is divided into three or more parts, thereby further reducing the third order. It is also possible to reduce the critical speed of the vehicle. In addition, the number of divisions is determined according to the diameter and length of the rotating cylinder, whereby the optimum tertiary critical speed that can be easily overcome in ultra-high-speed winding can be set.

Although the present invention has been described with respect to the winding of the yarn, the present invention is not limited to the yarn, but can be applied to other linear bodies, for example, high-speed winding of a steel wire.

Further, in FIG. 2, the primary and secondary critical speeds in the winding device according to the present invention shown in FIG. 1 and the one in the conventional winding device shown in FIG.
The reason why the second and second critical speeds are slightly deviated is that the position and length of the fitting portion between the drive shaft 3 and the rotary cylinder are slightly different.

[0033]

As described above, according to the present invention,
The rotary cylinder of the bobbin holder is divided in the axial direction, so that the third critical speed in the yarn winding device can be reduced to the number of rotations that can be easily overcome, and the operating speed range is reduced to three.
Since it can be set between the next and fourth critical speeds,
It becomes possible to achieve an ultra-high-speed winding of, for example, about 8,000 m / min, which exceeds 6,000 m / min, which cannot be achieved by the prior art, so that a desired yarn package can be produced with high productivity and low productivity. It can be manufactured at a low cost.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a yarn winding device according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram of the device of FIG.

FIG. 3 is a more detailed characteristic diagram of the apparatus of FIG. 1;

FIG. 4 is a partial cross-sectional view of a conventional yarn winding device shown for comparison.

FIG. 5 is a characteristic diagram of the device of FIG.

FIG. 6 is a more detailed block diagram of the apparatus of FIG. 4;

FIG. 7 is a partial cross-sectional view of a yarn winding device according to another embodiment of the present invention.

FIG. 8 is a partial sectional view of a yarn winding device according to still another embodiment of the present invention.

FIG. 9 is a partial sectional view of a yarn winding device according to still another embodiment of the present invention.

[Explanation of symbols]

 1: yarn winding device 2: motor 2a: output shaft 3: drive shaft 4: bobbin holder 5: housing 6: annular support 7a: bearing 7b: bearing 7c: bearing 8: rotating cylinder 8a: rotating cylinder is divided 8b: divided portion of rotating cylinder 9: bobbin gripping means 9a: cylindrical spacer 9b: elastic ring 10: spring 11: pressing mechanism 12: front lid 13: bobbin 14: roller bail holder 15: moving body 31: rotating Cylinder 31a: Divided part of rotating cylinder 31b: Divided part of rotating cylinder 41: Rotating cylinder 41a: Divided part of rotating cylinder 41b: Divided part of rotating cylinder 51: Rotating cylinder 51a: Rotating cylinder Divided portion 51b: Divided portion of rotating cylinder 51c: Reduced diameter portion

Claims (9)

[Claims] 1. A bobbin holder having a rotary cylinder fixed to a drive shaft and bobbin gripping means provided on an outer periphery of the rotary cylinder, wherein the rotary cylinder is divided into a plurality of portions in an axial direction. A unique bobbin holder. 2. The bobbin holder according to claim 1, wherein said divided portions are mechanically separated from each other. 3. The bobbin holder according to claim 1, wherein said divided portions are mechanically connected to each other. 4. The bobbin holder according to claim 3, wherein the second moment of area of the connecting portion is smaller than the second moment of area of the divided portions located on both sides of the connecting portion. 5. The bobbin holder according to claim 1, wherein a plurality of bobbins can be mounted. 6. A yarn winding device comprising: a drive source; a drive shaft rotated by the drive source; and the bobbin holder according to claim 1. 7. The yarn winding device according to claim 6, wherein the use rotational speed range of the bobbin holder is set between a third order and a fourth order critical speed. 8. The bobbin holder has a third critical speed of 6,
8. The method according to claim 6, wherein the setting is less than 000 rpm.
The yarn winding device according to 1. 9. A yarn package, wherein a yarn is wound on a bobbin mounted on a bobbin holder by using the winding device according to any one of claims 6 to 8, thereby forming a package. Manufacturing method.