JPH0558550A - Cone - Google Patents

Abstract

PURPOSE:To provide an increased taper winding cone wherein a cone edge part is prevented from being damaged at the time of packing transportation by improving reelability and further increasing a yarn amount when the cone is used in a weft yarn feed or the like of a high speed weaving machine. CONSTITUTION:A cone is increased-taper wound so that a top point of a virtual cone of circumferential surface in each winding diameter is concentrated almost to one point to flatly form a small diameter side end face. A cone is increased- tape wound so that a top point of a virtual cone of circumferential surface in each winding diameter is positioned in the vicinity of a yarn guide G to flatly form a small diameter side end face, when the cone is set to a weaving machine as a weft yarn feed. And the cone is wound at a surface angle of 9 deg. or more to a cone-shaped bobbin of 5 deg.57' or less cone angle to flatly form a small diameter side end face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cone (a package of yarn wound on a conical bobbin) which performs an incremental taper winding in which the inclination angle of the bobbin shaft is sequentially increased during the rewinding process, and particularly to an air jet loom. The present invention relates to an incremental taper winding cone suitable for weft feeding of a high-speed loom.

[0002]

2. Description of the Related Art Cups (spun tube yarns) after spinning
For example, as shown in FIG. 2, a conical bobbin B having a cone angle of 5 ° 57 ′ is rewound by a winder on an incremental taper winding cone C having a width of 6 inches, an outer diameter of 200 mm on the large diameter side, and a cone surface angle of about 7 ° and 5 °. ing. If this cone C is used for weft yarn feeding of a high-speed loom, the yarn is passed through the yarn guide G at a position about 40 cm away from the end surface of the cone C on the small diameter side and then fed to the loom side.
However, the intersection A of the extension line of the peripheral surface of the cone C exists 68 cm ahead of the thread guide G. Large diameter outer diameter 3
If it is 00 mm, the intersection of the extension lines on the cone surface is
It becomes A'further ahead. As a result, the yarn is released while rubbing the yarn on the peripheral surface of the cone C without forming ballooning as shown in FIG. Therefore, as shown in FIG. 4, the unraveling tension is large, the fluctuation is also very large, the yarn is fluffed by friction, and even the yarn breakage occurs in the ribbon generation diameter region. Therefore, in order to use this for the weft yarn feeding of the high-speed loom, it is actually rewound into a small cone having a width of 3 inches.

[0003]

Conventionally, in order to obtain a weft supply yarn for a high-speed loom, a rewinding process from a cup has to be performed twice, and the amount of yarn in a 3-inch width cone is not so large. .. On the other hand, the small diameter side end surface of the Increase taper winding cone C rewound from the cup is protruded as far as the outer layer because the yarn is wound around the conical bobbin B. Moreover, actually, in consideration of the looseness of the wound yarn, the outer layer is formed so as to protrude further from the theoretical end face. Therefore, when the diameter of the cone C becomes large to some extent, the edge portion of the end surface on the small diameter side, that is, the ear portion protrudes from the end portion of the conical bobbin B, and the cone ear portion is damaged during the package transportation.

The present invention, when used for weft yarn feeding of a high-speed loom, has a good releasing property and a large yarn amount,
It is an object of the present invention to provide an incremental taper winding cone in which the ear portion of the cone is not damaged during packaging and transportation.

[0005]

In order to achieve the above object, the cone of the present invention has an increased taper winding so that the vertices of the virtual cone of the circumferential surface at each winding diameter are concentrated at substantially one point, and the cone has a small diameter. The side end face is formed flat,
Incremental taper winding so that the apex of the virtual cone of the peripheral surface at each winding diameter is located closer to the yarn guide when set on the loom as a weft supply yarn, and the small diameter side end surface is formed flat , And cone angle 5 ° 5
Wound on a conical bobbin of 7'or less with a surface angle of 9 ° or more,
The end surface on the small diameter side is formed flat.

[0006]

[Operation] In the cone configured as above,
When it is set on a high-speed loom and unraveled, the apex of the virtual cone on its peripheral surface is always located closer to the yarn guide, and the yarn forms ballooning directly from the peripheral surface of the cone and does not rub against the peripheral surface of the cone. Be taken care of. Also, only the ears of the cone do not touch the middle plate, etc. during the package transportation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the cone of the present invention will be described with reference to FIGS. 1, 3, 4, and 5.

As the cone C, a cone bobbin B having a cone angle of 5 ° 57 'for 6 inches, which is widely used at present, is adopted as it is, and an incremental taper winding is made at a steeper angle than the conventional one. Are formed by performing. That is, the amount of increase in the cone surface angle that increases with an increase in the winding diameter is made larger than that of the conventional one, and the cone surface angle is finally set to a steeper angle than 9 ° 15 ′. Figure 1
As shown in, the extension line of the cone surface (apex of the virtual cone)
In order for each of the winding diameters to be concentrated at or near the position of the yarn guide G of the loom or the like, the cone surface angle must be set to such a large angle. In addition to the vertices of the virtual cone on the surface of the cone being concentrated at one point, it is also possible that they are dispersed in front of the yarn guide G. This is not preferable because it reduces the yarn amount. Also in the cone of the present invention, the apex of the virtual cone on the surface of the cone deviates to the cone C side at the beginning of winding, but this does not have any adverse effect.

The cone C is wound up so that the end surface on the smaller diameter side becomes flatter. Even if the steep-angled increment taper winding described above is performed by doing this, the cones are packed in several stacks through the middle plate, or directly on the pallet as widely adopted in Europe and the United States. When shipping by stacking palletizing corn, the ears of the corn are no longer damaged as they were in the past. The corn winder of the present invention has been separately filed (Japanese Patent Application No. 3-180360), but the invention is not limited thereto.

When the corn C having such a shape is unraveled on the loom at a high speed, a clear difference in fluffing on the corn surface is observed as compared with the conventional corn. In a traditional cone,
The thread rubs the cone surface, as shown by the solid line in Figure 2,
Unraveled with almost no ballooning. Especially, in the vicinity of the ribbon generation diameter, the fluffing caused by this friction causes a large fluctuation in tension, which is the main cause of the weft thread breakage and the cone sluffing breakage, and as shown in FIG. 4, the thread breakage occurs many times. However, in the cone C of the present invention, as shown by the solid line in FIG. 1, the yarn is unraveled by directly forming ballooning from the surface of the cone C, and the unraveling tension is as shown in FIG. It does not fluctuate abnormally even in the winding diameter region near the cone outer diameter of 245 mm corresponding to the generation diameter. The average tension value level is also higher than that of the conventional cone shown in FIG.
It has dropped significantly. From this knowledge, it can be said that it is sufficient to concentrate the outer layer portion at a point where the apex of the virtual cone on the cone surface is closer to the yarn guide than the initial ribbon generation diameter. The data shown in FIGS. 3 and 4 are obtained when a cotton card yarn of Ne40 was wound up on a traverse drum having a number of 2.5 wands and unwound at 1200 m / min.

Here, the distance from the small-diameter side end surface of the cone C to the thread guide G is 350 mm, and the unraveling speed is 600 to
The relationship between the plucking tensions of the conventional cone and the cone of the present invention when plucked at a rate of 1200 m / mim was examined. The result is as shown in FIG. 5. In the conventional cone, the leaching tension increases dramatically as the leaching speed increases, but in the cone of the present invention, the leaching tension simply increases in proportion. I just do it. Moreover, 1
Even the pour speed of 200 m / mim is smaller than the plow speed of 800 m / mim of the conventional cone.

[0012]

Since the present invention is constructed as described above, it has the following effects.

That is, as compared with the conventional cone, the fuzz on the surface of the cone is significantly reduced, and even in the ribbon generation area, the abnormal fluctuation of the plucking tension does not occur, and the average plucking tension is significantly increased. It fell, and there was almost no thread breakage when unraveling. They are more noticeable as the crushing speed of the corn increases. Therefore, a cone having a large amount of yarn obtained by rewinding a spun yarn with a winder can be used as it is for weft yarn feeding of a high-speed loom without a rewinding process. In addition, it is possible to prevent damage to the ears of the cone during transportation of the package.

Further, the twisting is reduced even when wound with a winder. The hardness distribution on the cone surface becomes uniform. Various effects such as less deformation after steam setting to prevent chattering occur.

[0015]

[Brief description of drawings]

FIG. 1 is a side view of a cone of the present invention.

FIG. 2 is a side view of a conventional cone.

FIG. 3 is a graph showing the relationship between the cone outer diameter and the plucking tension when plucking the cone of the present invention.

FIG. 4 is a graph showing a relationship between a cone outer diameter and a plucking tension when practicing a conventional cone.

FIG. 5 is a graph showing the relationship between the defusing speed and the defusing tension of the cone of the present invention and the conventional cone.

[Explanation of symbols]

 A Apex of the virtual cone on the peripheral surface of the cone B Cone-shaped bobbin C Cone G Thread guide

Claims (3)

[Claims] 1. A cone in which an apex of an imaginary cone on a peripheral surface in each winding diameter is wound by an increased taper so that the vertices are concentrated at substantially one point, and a small-diameter side end surface is formed flat. 2. When set on a loom as a weft supply yarn,
A cone in which the apex of the virtual cone on the peripheral surface at each winding diameter is positioned so as to be located closer to the yarn guide, and the small diameter side end surface is formed flat. 3. A cone having a cone-shaped bobbin having a cone angle of 5 ° or less and 57 ° or less and having a surface angle of 9 ° or greater and having a flat end surface on the small diameter side.