JP2601597B2 - Spinning bobbin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning bobbin, and more particularly, to an unwound yarn or a loopless yarn when a spun yarn is unwound from a bobbin in a subsequent step, for example, a winding step. The present invention relates to a spinning bobbin in which a number of convex protrusions are formed on a side peripheral surface of a bobbin main body which is a winding surface of a spun yarn in order to prevent occurrence of quality defects such as luffing.

[0002]

2. Description of the Related Art The general structure of a conventional spinning bobbin will be described with reference to FIG. The spinning bobbin (1) has a predetermined number of circumferential grooves (3) carved in parallel on its side peripheral surface (4), and a seat (5) for fitting to a spindle of a spinning machine at a bottom end.
And the whole is molded with plastic.

[0003] In the spinning process, a predetermined amount of spun yarn (2) is wound around the side peripheral surface (4) of the bobbin (1) by using the raising / lowering movement of a ring rail (not shown). The rising and lowering strokes of the ring rail are adjusted by changing the outer shape of the heart cam incorporated in the spinning machine. In each case, the spinning bobbin (1) as shown by the two-dot chain line in FIG. The winding operation is continued while sequentially increasing the stacking position of the spun yarn (2) from the lower end to the upper end of the spun yarn. The full-length spun yarn (2) wound up with a predetermined amount of the spun yarn (2) is pulled out from the spindle of the spinning machine by a manual operation of an operator or by an automatic pipe changer and supplied to a subsequent winding process. Is done.

[0004]

In the above-mentioned winding step, contrary to the spinning step which is the preceding step, the full-pipe yarn (2) is
The spinning bobbin (1) is supplied to the winding machine by being pulled upward from the upper portion. When the conventional spinning bobbin (1) shown in FIG. 3 is used, the following trouble occurs when the spun yarn (2) is unwound.

[0005] The surface of the smooth spinning bobbin (1) and the first
Since a large tension acts on the layer or the spun yarn (2) of the second layer due to an increase in the contact area, the spun yarn (2) is cut, and the entire spun yarn (2) is not released. The unwound yarn remains in the spinning bobbin (1), and it becomes necessary to remove the remaining yarn manually by a cutting blade or by an automatic yarn removing device. For this reason, not only productivity is reduced, but also the amount of waste thread is increased.

As the spun yarn (2), not only pure cotton yarn but also
There are cotton / polyester blended yarn, hemp / polyester blended yarn, cotton / acrylic blended yarn, etc., depending on the type of spun yarn (2), immersion conditions in water for twisting, steam setting conditions,
Alternatively, it is necessary to set winding conditions and the like. If these processing conditions are incorrectly set, a sluffing phenomenon occurs in which the spun yarn (2) slips off from the spinning bobbin (1) while maintaining the laminating form due to the combined influence of these factors. , While the amount of waste yarn generated increases,
A breakage accident occurs in the winding machine.

[0007] The higher the winding speed of the spun yarn (2), the more the traveling yarn meandering during unwinding becomes a spinning bobbin (1).
Partially makes strong contact with the surface. For this reason, the spun yarn (2) is fluffed and the yarn breakage is induced. Also, in some cases, the winding package (cheese) due to the generation of static electricity
This causes problems such as poor shape.

[0008]

As a means for solving the above problems, the present invention relates to a spinning bobbin having a scale-like irregular surface formed on a side peripheral surface of a bobbin body. The side peripheral surface of the bobbin repeats a sinusoidal undulation with a predetermined amplitude along the circumferential direction along the axial direction of the bobbin, and a plurality of abutting ridges and valleys between adjacent grooves. In addition to engraving a sine wave groove,
The mesh-like area surrounded by the sine-wave grooves is formed as a convex portion that gradually rises from the engraved area of the sine-wave grooves with its center at the top.

[0009]

Further, the scaly pattern-shaped uneven surface is formed in a substantially turret pattern which is compressed in the axial direction of the bobbin body and flattened in the circumferential direction, and a boundary between adjacent turtle patterns is a valley,
The central portion of each turtle pattern is formed as a convex portion gently rising from the peripheral portion.

[0011]

[Function] By forming a scale-like uneven surface on the side peripheral surface of the spinning bobbin main body, the cross-sectional profile of each position in the axial direction of the bobbin main body varies in a variety of ways. Since the wrapping profile of the strip is also different, wheel slippage during unwinding is prevented.

In the case where the scale-like uneven surface is surrounded by a sinusoidal groove and a convex portion gently rising from the engraved area of the sinusoidal groove toward the center thereof is formed. When the yarn is unwound, it contributes to the prevention of slippage as an adjustment region of the yarn tension.

In the case of a turtle-patterned shape, by compressing in the axial direction of the bobbin main body and flattening, the axial unevenness of the bobbin main body with respect to the wound yarn increases.
Useful for preventing slippage when unwinding yarn.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific example of a spinning bobbin according to the present invention will be described with reference to FIG.

[0015] On the side peripheral surface (4) of the spinning bobbin main body (10),
A predetermined amplitude (T) along the circumferential direction with respect to the axial direction
Repeats a sinusoidal undulation at the adjacent groove (11
A plurality of sine wave grooves (11A), (11B),... Having the top and the valley abutted between A) and (11B) are engraved.
Then, the mesh-like area (12) surrounded by the two sine wave grooves (11A) and (11B) is divided into the sine wave grooves (11A) and (11B) over the section (1) with the central portion as the vertex. Is formed on a convex portion that rises gently from the engraving area of the slab.

The convex portion (12) is intermittent when the first or second layer of spun yarn (2) wound directly on the spinning bobbin (10) separates from the side peripheral surface (4). , The rising angle of the spun yarn (2) is increased, and the unwinding resistance is reduced to maintain a smooth unwinding state.

On the other hand, by forming a projection (12) on the yarn winding surface of the spinning bobbin (10), the first layer or the second layer is formed.
Contrary to the spun yarn (2) in the layer, a large frictional resistance due to an increase in the surface area of the spinning bobbin (10) acts on the sluff, which is a lump of the multiply wound spun yarn (2). Is prevented.

Further, the spun yarn (2) is a spinning bobbin (10)
Unwound so that it is pulled upward from
The projections (12) are only in point contact, and the damage to the yarn and the generation of static electricity are greatly reduced as compared with the case where the conventional surface contact type spinning bobbin (1) is used.

The width of the wave of the convex portion (12) is as shown in FIG.
As shown in (1), the width may be alternately formed in the circumferential direction, or the width may be the same without forming the width. Also, in the axial direction, the convex part (1
2) may be formed, or the width may be the same without widening or narrowing.

Next, another embodiment of the present invention will be described with reference to FIG.

In this embodiment, a substantially tortoiseshell pattern (20) compressed in the axial direction of the bobbin body (10) and flattened in the circumferential direction is provided on the side peripheral surface (4) of the bobbin body (10). None, the boundary of the adjacent turtle pattern is a valley (20A), and the center of each turtle pattern is formed as a convex part (20B) that rises gently from the peripheral part.

As shown in FIG. 2B, each of the turtle patterns may be alternately repeated long and short in the circumferential direction, or may be a plurality of (3 to 6) equally divided shapes in the circumferential direction.

In the case of the above-mentioned tortoiseshell pattern (20), since the bobbin main body (10) is compressed in the axial direction, the bobbin main body (10) has more irregularities in the axial direction, which is advantageous for preventing wheel slippage. Become. In addition, it is easier to manufacture the mold with the turtle pattern (20) than the sinusoidal groove shown in FIG.

The present invention is not limited to the above-described sinusoidal grooves and crevices, but the desired object can be achieved by forming a scale-like uneven surface.

[0025]

By using the spinning bobbin according to the present invention, damage to the spun yarn at the time of unwinding and generation of static electricity are suppressed, and a reduction in the amount of waste yarn generated and an improvement in yarn quality are remarkable. Effect is exhibited. Furthermore, the area of contact of the yarn wound on the bobbin with the bobbin surface is in contact with the yarn at portions other than the intersection of the scale-like raised portion and the valley portion, but becomes non-contact at the intersection of the valley portion. As a result, the contact area of the yarn with the bobbin surface is smaller than before, and the yarn is wound along a smooth uneven surface in a scale-like pattern. Since the contact resistance to the yarn layer and the bobbin is reduced and the tension of the yarn during unwinding is also reduced, fluffing of the yarn and breakage of the yarn are prevented. In addition, since the side peripheral surface of the bobbin main body is formed of a scale-like smooth uneven surface, there is an advantage that the resistance for removing the remaining yarn is reduced and the remaining yarn is easily removed.

[Brief description of the drawings]

FIG. 1A is a front view of a spinning bobbin according to the present invention. FIG. 1B is an enlarged front view of a circled portion in FIG. Enlarged cross-sectional view along C

FIG. 2A is an enlarged cross-sectional view showing another example of the spinning bobbin according to the present invention. FIG. 2B is a development view of an uneven surface pattern on the peripheral side surface of the spinning bobbin in FIG. (A) Longitudinal sectional view along line CC in the figure

FIG. 3 is a front view of a conventional spinning bobbin.

[Explanation of symbols]

 2 Spinning yarn 4 Side surface of spinning bobbin 10 Spinning bobbin 11A, 11B Sinusoidal groove 12 Convex 20 Substantially turtle pattern 20A Valley 20B Convex

Claims (2)

(57) [Claims] 1. A spinning bobbin having a scale-like uneven surface formed on a side peripheral surface of a bobbin body, wherein the scale-like uneven surface is formed along the circumferential direction on the side circumferential surface of the bobbin body. A plurality of sinusoidal grooves having a predetermined amplitude with respect to the axial direction are repeated, and a plurality of sinusoidal grooves in which the tops and the valleys are abutted between adjacent grooves are engraved.
A spinning bobbin, wherein a mesh-like area surrounded by the sine wave grooves is formed as a convex portion that gradually rises from the engraved area of the sine wave groove with its center at the top. 2. A spinning bobbin having a scale-like irregular surface formed on a side peripheral surface of a bobbin body, wherein the scale-like irregular surface is compressed in the axial direction of the bobbin body and flattened in the circumferential direction. A spinning bobbin characterized by a substantially turtle pattern, a boundary between adjacent turtle patterns being a valley, and a central part of each turtle pattern being formed as a convex part gently rising from a peripheral part.