JP3329955B2 - Hollow spindle of covering machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow spindle of a covering machine for producing a covering yarn in which an elastic yarn such as polyurethane is used as a core yarn and a covering yarn such as nylon is wound.

[0002]

2. Description of the Related Art At present, in the case of women's pantyhose, a support type in which a stocking portion is knitted with a covering thread excellent in stretchability and durability is mainly used.

[0003] The knitting structure generally includes a covering yarn wound around a core yarn of an elastic yarn such as polyurethane, a filament yarn of a thermoplastic synthetic fiber such as nylon as a covering yarn, and a drawn yarn such as nylon. The so-called "cross knitting" is alternately knitted, but there is also a so-called "zokki knitting" in which all yarns are knitted with the covering yarn.
The latter has the advantage of being softer than the former, and has recently become widespread in the pantyhose industry. In the case of the latter pantyhose,
There is a drawback that elasticity is large not only in the horizontal direction but also in the vertical direction, and an excessive tightening force is felt when worn. For this reason,
It has been devised so that it can be worn with an appropriate fit, and recently there has been a tendency to make the core yarn and the covering yarn thinner, resulting in increased transparency.

[0004] Further, although the detailed description is omitted, the yarn used in the knitting when the covering yarn is manufactured by a covering machine whose basic structure is known in Japanese Patent Publication No. 56-20372 is used. While it was manufactured with a total draft ratio of 3.2 to 3.3, from experience so far, the Zocchi knitting was set to 3.0 or less, so that it was worn without feeling excessive tightening force. I found

[0005]

However, in the above-described covering machine, when the draft ratio is small and the draft ratio is low, the tension of the core yarn is weaker than the case where the yarn used for the knitting is manufactured. If the tension is low, the diameter of the balloon becomes large, so that the length of the balloon becomes long, and the portion in contact with the inner peripheral surface of the spindle becomes long due to the viscosity of the oil agent. Therefore, as the time elapses, even if the amount of the oil agent attached to the inner peripheral surface is small, the oil becomes frictional resistance to the running of the yarn, and the running speed of the core yarn downstream of the spindle becomes irregular. Therefore, the winding of the cover yarn is also uneven, and the quality of the covering yarn is remarkably deteriorated. Further, the oil agent adhering to the elastic yarn has a very high viscosity, and even a very small amount thereof has an adverse effect on the running of the yarn, requiring frequent cleaning, which is also a problem in terms of productivity.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a pantyhose that is soft, does not have excessive tightening force, and is excellent in transparency and durability. In a covering machine, even if the draft ratio is 3.0 or less with a fine core yarn, the covering yarn can be manufactured with high productivity.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a hollow spindle of a covering machine for producing a coated elastic yarn, wherein a relatively coarse spiral wire is inserted into substantially the entire hollow portion of the spindle. The balloon formed on the core yarn passing through the hollow portion is configured not to contact the peripheral surface of the hollow portion.

[0008]

In the covering machine employing the hollow spindle having the above-described structure, even if the fine yarn of about 15 denier is reduced to a draft ratio of 3.0 or less, the core yarn directly contacts the inner peripheral surface. Since only a very small portion of the wire is in contact with the wire, the highly viscous oil agent does not adhere to the helical wire, so that the running of the core yarn having a low tension does not become irregular.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic view of a double covering machine for manufacturing a covering yarn in which a synthetic fiber such as nylon is wound around a core yarn of an elastic yarn made of polyurethane or the like as a covering yarn. Is drawn out of the bobbin 1 by the delivery roller 2 and is fed upward, and is provided with a first draft roller 3, a hollow first spindle 4, a first centering guide 5, a hollow second spindle 6, a second centering guide 7, and a 2 The roll passes through the draft roller 8 and the traverse guide rod 9 sequentially and is wound on a winding drum 11 by a winding roller 10, and is unwound from a first bobbin 12 mounted on a first spindle 4 to a core yarn A in the middle thereof. The first cover yarn to be wound and the second cover yarn unwound from the second bobbin 13 attached to the second spindle 6 are wound and covered. To have. Endless belts 14 and 15 are wound around the first spindle 4 and the second spindle 6, respectively. The first spindle 4 and the second spindle 6 rotate at high speed together with the mounted first bobbin 12 and the second bobbin 13, respectively. Is relatively coarse (pitch: 8 to 15 m) as shown in FIG.
The spiral wire 16 of m) is inserted. The spiral wire 16 is wound at a pitch shorter than the balloon length formed on the traveling core yarn A as shown in FIG. It is wound by.

In the covering machine having the above construction, the core yarn A is stretched between the first draft roller 3 and the second draft roller 8, and the draft ratio is determined by adjusting the covering yarn used for the cross-knitting. Draft ratio for production 3.2
Although it is set to 3.0 or lower, which is lower than ~ 3.3,
The tension on the yarn is considerably reduced. Since the core yarn A travels inside the hollow spindles 4 and 6 by forming a balloon under the influence of airflow and misalignment, the core yarn A comes into contact with the spiral wire 16 inserted into the hollow spindles 4 and 6. At this time, the core yarn A
Since it comes into contact with the helical wire 16, the spindles 4, 6
Does not come into direct contact with the inner peripheral surface, and is hardly affected by highly viscous oil adhering to the inner peripheral surface despite low tension, so that traveling is stable.

[0011]

According to the present invention, a relatively coarse spiral wire is inserted into a hollow spindle to produce a covering yarn that can be used for knitting. Even if the ratio is reduced, it is possible to stabilize traveling, and it is possible to produce an even and high quality covering yarn. Also, in cleaning the inside of the spindle, the oil agent can be removed only by replacing the spiral wire, and the time can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a double covering machine embodying the present invention.

FIG. 2 is a component diagram showing an example of a spiral wire mounted on a spindle of a covering machine embodying the present invention.

FIG. 3 is a sectional view of a main part showing a state of a core yarn in a spindle of the present invention.

FIG. 4 is a sectional view showing a state of a core yarn in a conventional spindle.

[Explanation of symbols] A core thread B, C coated thread 4, 6 spindle 16 spiral wire

Claims (1)

(57) [Claims] 1. A hollow spindle of a covering machine for producing a coated elastic yarn, wherein a relatively coarse spiral wire is inserted into substantially the entire length of the hollow portion of the spindle, so that a core yarn passing through the hollow portion of the spindle. A hollow spindle of a covering machine, wherein a balloon generated in the hollow spindle does not contact the peripheral surface of the hollow portion.