JP2867973B2 - Elastic yarn package and method of unwinding elastic yarn package - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic yarn package wound with an elastic yarn and an elastic yarn package formed by winding the elastic yarn with a traversing cam while traversing the elastic yarn. And a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, which is a development view of a single-cycle traverse cam, a traverse groove t1 is shown.
A line t4 connecting the two folded portions t2 and t3 located at both ends of the traversing cam T1 formed with the traverse cam T1 is an elastic yarn manufactured using a standard single-cycle traversing cam T1 formed linearly. A method of manufacturing an elastic yarn package using a package and such a standard single-cycle traverse cam T1 is known.

[0003]

An elastic yarn package manufactured by winding an elastic yarn around a bobbin b using a standard single-cycle traversing cam T1 as shown in FIG. As shown in FIG. 8, it is known that the ear height portion p1 is formed at the shoulder of P1, and in the case of the elastic yarn package, compared with the plain yarn having no elasticity, Due to the restoring force of the elastic thread itself,
This ear height is remarkable. The elastic yarn package P1 manufactured in this manner is, as shown in FIG.
The elastic yarn package P is placed on a pair of rewind drive rollers d which are arranged in parallel and positively rotated.
The elastic yarn f is unwound from 1.

[0004] When the elastic yarn package P1 having the ear portion p1 formed on the shoulder portion as described above is placed on the rewinding drive roller d and the elastic yarn f is unwound, it is shown in FIG. As described above, since the folded portion of the elastic yarn f forming the ear-height portion p1 is pressed against the rewinding drive roller d, the unwound elastic yarn f is unwound. A phenomenon occurs in which the elastic yarn located in the lower layer of the elastic yarn f slides and is wound around the elastic yarn located in the lower layer. The winding phenomenon of the elastic yarn located in the lower layer due to the unwound elastic yarn f will be described with reference to FIG. 11 which is a schematic diagram of the elastic yarn constituting the folded portion in one ear height portion p1.

F1 is an unwound elastic yarn located at the uppermost layer of the elastic yarn package P1, f2 is an elastic yarn located immediately below the unwound elastic yarn f1, and Further, f3 is an elastic yarn located in a lower layer immediately below the elastic yarn f2. The elastic yarn f2 located in a lower layer immediately below the unwound elastic yarn f1 is a folded portion t2
Is formed on the uppermost layer of the elastic yarn package P1 by pressing downward by the unwound elastic yarn f1 positioned above and pressing from the rewinding drive roller d. When the located elastic yarn f1 is unwound in the direction of the arrow (A), the unwound elastic yarn f
In this case, the elastic yarn f1 is slid more strongly, is entangled in the unwound elastic yarn f1, and is unwound together with the unwound elastic yarn f1. This phenomenon occurs because the elastic yarn itself has a restoring force that tends to shrink due to its elasticity, so that the elastic yarns f1 to f3 move in the direction of the arrow (B), that is, in the direction of the center of the elastic yarn package P1. Because it is energized,
The winding phenomenon of the elastic yarn f2 located in the lower layer due to the unwound elastic yarn f1 as described above becomes remarkable.

As described above, the unwound elastic yarn f
When the elastic yarn f2 located in the lower layer is entangled by No. 1, the unwinding tension varies,
As shown by the dotted line in FIG. 9, the elastic yarn f2 located in the lower layer wound around the unwound elastic yarn f1 is caught on the surface of the elastic yarn package P1 and the unwinding tension is reduced. Become. When weaving or knitting a knitted fabric using an elastic yarn having a variation in unwinding tension, a portion woven or knitted by an elastic yarn having a high unwinding tension is pulled, and the value of commercial value is reduced. Reduced fabrics and knits will be produced.

An object of the present invention is to solve the above-mentioned problems of the conventional elastic yarn package and to provide a method of manufacturing an elastic yarn package for manufacturing an elastic yarn package having a uniform unwinding tension.

[0008]

According to the present invention, in order to achieve the above-mentioned object, firstly, a bulge portion higher than an ear height portion formed on a shoulder portion of a package is provided near a center portion of the package. Or at the center of the package, and secondly, a drive for rewinding the elastic yarn package.
Place the roller on the roller and remove the elastic yarn from the elastic yarn package.
The method for unwinding an elastic yarn package for unwinding
Elastic yarn package, formed on the shoulder of the package
The bulge that is higher than the ear height to the center of the package.
Or in the center of the package
Is what it is.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, FIG. 1 is a development view of a double cycle traversing cam used in the method of manufacturing an elastic yarn package of the present invention. FIG. 1 shows an elastic yarn package manufactured using the traversing cam. An embodiment of the present invention will be described with reference to FIG. 2 which is a partial front view and FIG. 3 which is a partial front view of the elastic yarn package mounted on a rewinding drive roller.

The double cycle traversing cam T2 used in the method of manufacturing the elastic yarn package of the present invention performs two reciprocating traverses by one rotation of the traverse cam T2. The traverse groove t5 forms one cycle having a narrow width w1, and the traverse groove t6 forms one cycle wider than the traverse width w1. Therefore, as shown in FIG. 2, the elastic yarn package P2 manufactured by such a double cycle traversing cam T2.
The ear height portion p2 formed by the traverse groove t6 having a wide traverse width w2 and located at the shoulder of the elastic yarn package P2.
And an ear height portion p3 formed by the traverse groove t5 having a narrow traverse width w1 and located inside the shoulder of the elastic yarn package P2. Further, since the elastic yarn reaches the shoulder only once in two cycles from the shape of the traverse cam T2 of the double cycle, the yarn density of the shoulder is located inside the shoulder. The height of the ear portion p2 formed on the shoulder portion of the elastic yarn package P2 is half of that of the other portion such as the ear height portion p3, so that the height is formed inside the shoulder portion of the elastic yarn package P2. It becomes lower than the ear height p3.

The ear height p2 formed on the shoulder of the elastic yarn package P2 and the elastic yarn package P2 as described above.
When the elastic yarn package P2 having the lug portion p3 formed on the inner side of the shoulder of the elastic yarn package P2 is placed on the rewinding drive roller d as shown in FIG. The lug portion p3 formed on the inner side abuts against the rewinding drive roller d, and the lug portion p2 formed on the shoulder of the elastic yarn package P2 does not contact the rewinding drive roller d. become. Therefore, the elastic yarn f unwound at the folded portion t2 as described above.
Since there is no pressing by the rewinding drive roller d against the elastic yarn f2 located below the elastic yarn f1, the unraveled elastic yarn f1 is moved to the elastic yarn f2 located below the unraveled elastic yarn f. It is possible to prevent the elastic yarn f <b> 2 located in the lower layer from being entangled and to be entangled.
The unwinding tension of the elastic yarn from No. 2 is substantially constant. Note that the lug height p2 formed on the shoulder of the elastic yarn package P2 abuts on the rewinding drive roller d, similarly to the lug height p3 formed inside the shoulder of the elastic yarn package P2. Also in this case, the pressing is dispersed by the drive roller d for rewinding to the elastic yarn f2 located below the unraveled elastic yarn f1. The winding of the elastic yarn f2 is considerably prevented.

The difference between the narrow traverse width w1 and the wide traverse width w2 is preferably about 8 mm, for example. If the difference in the traverse width is about 8 mm, the ear height p3 formed inside is formed at a position about 4 mm inside from the shoulder of the elastic yarn package P2. Further, in order to prevent the elastic yarn located in the lower layer from being entangled during the unwinding as described above, the ear-height portion p3 formed on the inner side is inwardly about 4 mm or more from the shoulder of the elastic yarn package P2. Preferably, it is formed at the position where it enters.

Next, FIG. 4 is a development view of a single-cycle traversing cam used in the method of manufacturing an elastic yarn package of the present invention. FIG. 4 shows a part of an elastic yarn package manufactured using the traversing cam. Another embodiment of the present invention will be described with reference to FIG. 5 which is a front view and FIG. 6 which is a partial front view of the elastic yarn package mounted on a rewind drive roller.

In the traversing cam T3 shown in FIG. 4, the traversing groove t7 forms a sine curve with respect to a straight line t10 connecting two folded portions t8 and t9 located at both ends. It is configured. That is, the traverse groove t7
Is gradually separated from the straight line t10 from the center point t10 ′ of the straight line t10 connecting the two folded portions t8 and t9 toward the folded portions t8 and t9, and then approaches the straight line t10 again. It is configured.

As shown in FIG. 5, the elastic yarn package P3 manufactured by the traverse cam T3 as described above has a barrel portion having a central portion p4 formed in the shape of the barrel that is most inflated. The elastic yarn package P3 having such a shape
Is placed on the rewinding drive roller d as shown in FIG. 6, the central part p4 of the body of the elastic yarn package P3 abuts on the rewinding drive roller d, and the elastic yarn package P3 Will not come into contact with the rewind drive roller d. Accordingly, at the folded portion t2, there is no pressing by the rewinding drive roller d against the elastic yarn f2 located below the unwound elastic yarn f1 at the folded portion t2, so that the unwound elastic yarn f1
Is the elastic yarn f located below the unwound elastic yarn f.
2, the elastic yarn f2 located in the lower layer can be prevented from being entangled, so that the unwinding tension of the elastic yarn from the elastic yarn package P2 is substantially constant. The elastic yarn package P3 manufactured by the traverse cam T3 as described above also has a shoulder at the center part p of the trunk.
An ear height portion p5 lower than the bulging portion of No. 4 is formed.

As described above, the package P is higher than the ear heights p2 and p5 formed on the shoulders of the packages P2 and P3.
2, near the center of P3 or package P2, P
A bulge portion such as an ear height portion p3 or a trunk portion p4 projecting higher than the ear height portions p2 and p5 is formed in a central portion of the elastic thread packages P2 and P5. d, the unraveled elastic yarn located on the uppermost layer slides on the elastic yarn located on the lower layer of the unwound elastic yarn, and the elastic layer located on the lower layer It is possible to prevent the yarn from being entangled, so that the unwinding tension of the elastic yarn from the elastic yarn packages P2 and P3 is substantially constant.

[0017]

Since the present invention is configured as described above, the following effects can be obtained.

It is possible to prevent the unraveled elastic yarn located at the uppermost layer from sliding on the unraveled elastic yarn located below the unraveled elastic yarn, thereby preventing the elastic yarn located at the lower layer from being involved. Therefore, the unwinding tension of the elastic yarn from the elastic yarn package can be made substantially constant.

An elastic yarn package having a small variation in unwinding tension can be manufactured by a simple method using a traverse cam.

[Brief description of the drawings]

FIG. 1 is a development view of a double-cycle traversing cam used in a method of manufacturing an elastic yarn package according to the present invention.

FIG. 2 is a partial front view of an elastic yarn package manufactured by the traverse cam shown in FIG.

FIG. 3 is a partial front view showing a state in which the elastic yarn package shown in FIG. 2 is placed on a rewind drive roller.

FIG. 4 is a development view of a single-cycle traversing cam used in another method of manufacturing an elastic yarn package according to the present invention.

FIG. 5 is a partial front view of an elastic yarn package manufactured by the traverse cam shown in FIG. 4;

FIG. 6 is a partial front view showing a state in which the elastic yarn package shown in FIG. 5 is placed on a rewind drive roller.

FIG. 7 is a development view of a single-cycle traverse cam used in a conventional method for manufacturing an elastic yarn package.

FIG. 8 is a front view of an elastic yarn package manufactured by the traversing cam shown in FIG. 7;

FIG. 9 is a side view showing a state in which the elastic yarn is unwound from the elastic yarn package placed on the rewind drive roller.

FIG. 10 is a partial front view showing a state in which the elastic yarn package shown in FIG. 7 is placed on a drive roller for rewinding.

FIG. 11 is a schematic diagram of an elastic yarn constituting a folded portion in one ear height portion.

[Explanation of symbols]

 P2, P3 ... Elastic yarn package T2, T3 ... Twilling cam d ... Rewinding drive roller f ...・ Elastic thread p2, p3 ... ear height

Claims (2)

(57) [Claims] 1. An elastic yarn package characterized in that a bulge portion higher than an ear height portion formed on a shoulder portion of a package is formed near a center portion of the package or at a center portion of the package. 2. A drive roller for rewinding an elastic yarn package.
And unwind the elastic yarn from the elastic yarn package.
The method for unwinding an elastic yarn package, comprising:
Ear height formed on the shoulder of the package as a package
The bulge that is higher than the part is closer to the center of the package,
Alternatively, use the one formed in the center of the package.
And a method for unwinding an elastic yarn package.