JPH0681227A - Apparatus for setting roving distance in fine spinning frame for production of particular yarn - Google Patents

Abstract

PURPOSE:To provide an apparatus having simple structure and capable of keeping a definite distance between a pair of fleeces delivered from a front roller in spinning. CONSTITUTION:A trumpet 7 is placed at the upstream side of a back roller 5. Two rovings R1 and R2 moving from the back roller 5 to the second roller 4 are made to contact with the opposite sides of a restriction part of a restriction member 9 placed between the back roller 5 and the second roller 4. The distance between the rovings R1 and R2 delivered from the back roller 5 is expanded in such a manner as to contact with the restriction part 9a at the opposite sides at a position corresponding to the restriction member 9. After contacting with the member, the rovings R1 and R2 are guided through the second roller 4 to a front roller 5 while keeping the distance W equal to the width of the restriction part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method in which two rovings are simultaneously drafted in the same drafting area of a spinning machine into two fleeces, which are spun from a front roller and then twisted into one yarn. The present invention relates to a roving interval setting device in a spinning machine for producing a special yarn for spinning a yarn.

[0002]

2. Description of the Related Art Conventionally, two rovings are simultaneously drafted in the same drafting area of a ring spinning machine into two fleeces,
A method is known in which the fleece is spun from a front roller and then twisted into a single yarn to produce a special yarn which is a double-yarn-shaped single yarn. This special yarn is also called silospan (trade name) yarn, has a higher yarn strength than ordinary ring yarn, and is almost comparable to conventional twin yarns. In addition, the generation of fluff is less than that of ordinary ring yarn.

Conventionally, as a device for manufacturing this kind of special yarn, as shown in FIG. 9, a back roller 3 of a ring spinning machine is used.
There is a one in which a two-mouth trumpet 32 is provided upstream of No. 1 and the interval between the two rovings R1 and R2 supplied to the back roller 31 is set. In this device, two rovings R1,
R2 is supplied to the back roller 31 with a predetermined width from the two-mouth trumpet 32. The rovings R1 and R2 are back rollers 31.
Between the apron 33 and the apron 33 and between the apron 33 and the front roller 34 to form fleeces F1 and F2.
Then, after being sent out from the front roller 34, it is twisted into one yarn to form a yarn Y, which is wound on a bobbin B via a snell wire 35 and a traveler 36.

Further, in order to set the interval between the fleece fleeces F1 and F2 sent out from the front roller 34 to a predetermined interval, a collector having two narrow grooves for running the fleece is provided between the front roller 34 and the apron 33. Some have been proposed. (For example, the actual Kaisho 61-108
371).

[0005]

It is known that the quality and characteristics of this type of special yarn vary depending on the distance X between the two fleeces F1 and F2 fed from the front roller 34 during spinning shown in FIG. Has been. Further, when the distances L1 and L2 between the intersecting twist point P of the two fleeces F1 and F2 and the nip points of the respective fleeces F1 and F2 of the front roller 34 change, the twist structure of the yarn changes. When the distance X changes, the distances L1 and L2 also change. Therefore, it is important to keep the distance X between the two fleeces F1 and F2 constant in order to spin a good quality yarn.

However, when the interval between the rovings R1 and R2 supplied to the back roller 31 is set by using the two-trumpet 32, the outlet of the trumpet 32 and the roving R are provided.
The rovings R1 and R2 can freely move by the amount of play with the R1 and R2. As a result, the interval X changes during spinning, and there is a problem that a yarn with stable yarn quality cannot be spun.

On the other hand, when a collector having two narrow grooves for running the fleece is provided, the fleeces F1 and F2 are fed to the front roller 34 in a state where movement in the width direction is completely restricted by the narrow grooves. Be done. Therefore, the distance X and the distances L1 and L2 are kept constant. However, in the case where the collector is provided, the flat fleeces F1 and F2 are crushed when passing through the narrow grooves, generating flies and disturbing the parallelism of the fibers forming the fleece. In addition, the cotton wool generated when the fleece is squeezed accumulates near the entrance of the collector and grows, and the grown cotton wool is caught in the fleece and mixed into the spun yarn to form a slab, which causes thread breakage. There is a problem of becoming.

The present invention has been made in view of the above problems, and an object thereof is a special structure capable of keeping a constant interval between two fleeces fed from a front roller during spinning with a simple structure. An object of the present invention is to provide a roving interval setting device in a spinning machine for yarn production.

[0009]

In order to achieve the above object, in the present invention, two rovings are simultaneously drafted in the same draft area of a spinning machine into two fleeces, which are spun from a front roller. In a spinning machine for producing a special yarn, which is twisted and twisted into one yarn after being taken out, a trumpet is provided upstream of the back roller, and the back roller and the second roller are provided between the back roller and the second roller. A regulating member having a regulating portion that comes into contact with the two roving yarns moving toward each other only on opposite sides thereof is provided.

It is preferable that the regulating member is detachably attached to the supporting member.

[0011]

[Function] 2 supplied from the trumpet to the back roller
The roving of the book is sent out from the back roller in a state in which the interval is narrower than the interval of the restriction portion of the restriction member. The spacing between the two roving yarns sent from the back roller is widened so that the opposing sides of the two roving yarns are in contact with the regulating portion at positions corresponding to the regulating member. After that, the two roving yarns are guided to the front roller through the second roller in a state where the distance between the two roving yarns is kept at the distance of the regulating portion, and then fed out from the front roller as fleece. Since the two roving yarns pass through the position corresponding to the regulating member in a state where only one side of the roving yarn is in contact with the regulating portion of the regulating member, unlike the case where the two roving yarns pass through the groove, no cotton wool is generated due to ironing.

When the regulating member is detachable, when changing the setting of the roving interval, it is possible to easily change the setting of the roving interval by replacing the regulating member with a regulating member having a different interval.

[0013]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. The structure of the spinning machine is basically the same as that of a known spinning machine, and the structure of the roving interval setting device is different.

As shown in FIG. 1, the draft part 1 includes a front roller 2 and a second roller 4 having an apron 3.
And a back roller 5. A traverse bar 6 is provided behind the back bottom roller 5a along the back bottom roller 5a. A trumpet 7 is fixed to the traverse bar 6 for each weight so that the outlet portion 7a of the trumpet 7 corresponds to the inlet portion of the back roller 5 and is integrally movable. In the trumpet 7, the diameter of the outlet portion 7a is equal to the thickness of two rovings R1 and R2 (shown in FIG. 2) plus α.
It is formed to the size of. The traverse bar 6 is reciprocated by a drive mechanism (not shown) so that each trumpet 7 makes a traverse motion within a range of about ± 3 mm in the axial direction (longitudinal direction of the spinning machine stand) with the center of the back roller 5 as an origin. It has become so.

A support member 8 is fixed to the traverse bar 6 so that it can move integrally. The support member 8 is formed such that its base end is fixed to a position corresponding to each trumpet 7 and its front end is located between the back bottom roller 5a and the second bottom roller 4a. A flange portion 8a is formed near the tip of the support member 8. Support member 8
A regulating member 9 is detachably fixed to the tip of the. The regulating member 9 is formed in a columnar shape, and a fitting hole formed in the bottom of the regulating member 9 is fitted to the tip of the supporting member 8. Control member 9
Is fixed so as to extend in a state orthogonal to the back roller 5 and orthogonally to the traveling direction of the roving yarn. Then, the outer peripheral surface of the regulating member 9 extends from the back roller 5 to the second roller 4
The two roving yarns R1 and R2 that move toward each other constitute a regulating portion 9a that comes into contact with each other on the sides facing each other.

Next, the operation of the device configured as described above will be described. As shown in FIG. 2, the two rovings R1 and R2 supplied to the trumpet 7 are supplied to the back roller 5 from the same outlet portion 7a. That is, two rovings R1 and R
2 is the interval (diameter) of the restriction portion 9a of the restriction member 9
It is fed from the back roller 5 in a narrower state. The two rovings R1 and R2 sent from the back roller 5 are
The interval is widened so that the sides facing each other at the position corresponding to the regulating member 9 come into contact with the regulating portion 9a. After that, it is guided to the front roller 5 via the second roller 4 in a state in which the distance W between the two rovings R1 and R2 is maintained at the distance of the regulating portion 9a.

The rovings R1 and R2 are drafted between the back roller 5 and the second roller 4 and between the second roller 4 and the front roller 2 into fleeces F1 and F2. And the fleece F sent from the front roller 2
1, F2 are twisted together into a yarn Y, which is wound on the bobbin B via the snell wire 10 and the traveler 11.

Since the two rovings R1 and R2 pass through the position corresponding to the regulating member 9 with only one side contacting the regulating portion 9a of the regulating member 9, unlike the case of passing through the groove, the ironing occurs. There is no fly dust. Further, since the regulating member 9 extends so as to intersect with the traveling direction of the roving yarns R1 and R2 in a state of being orthogonal to the back roller 5, there is no place where the cotton wool or the like is deposited. Therefore, unlike when using a collector,
The grown piled cotton wool is not caught in the rovings R1 and R2.

The diameter of the regulating member 9, that is, the distance W between the rovings R1 and R2 supplied to the second roller 4 is changed in steps of 2 mm, and the single yarn strength and fluff of the yarn obtained by spinning are shown in FIGS. 4 shows. However, the spinning conditions of the yarn are as follows. Raw material: cotton (combed yarn), count: Ne30,
Ring diameter: 36φ, Spindle speed: 12000rp
m.

As is apparent from FIG. 3, the single yarn tenacity is improved as the distance W is increased. Further, as is clear from FIG. 4, the occurrence of fluff decreases as the distance W increases. That is, it is confirmed that the regulation of the spacing between the rovings R1 and R2 by the regulation member 9 is performed accurately and stably. The data at the position S in FIGS. 3 and 4 is the data of the yarn obtained by spinning using one roving yarn without providing the regulating member 9, and the interval 0 mm means that the regulating member 9 is provided. Without 2
The data of the yarn obtained by spinning using a roving of a book is shown.

In the apparatus of this embodiment, the rovings R1 and R2 contact only the predetermined portions of the top roller and the apron 3 so that the rubber of the top roller and the apron 3 is worn in a short period of time and the replacement cycle thereof is shortened. In order to prevent this, the trumpet 7 performs a traverse movement. But,
Since the regulating member 9 also moves in the same direction as the trumpet 7, both rovings R1 and R supplied to the second roller 4 are fed.
The interval W of 2 is always held at a predetermined value determined by the diameter of the regulating portion 9a.

Further, since the regulating member 9 is detachably fixed to the supporting member 8, when the spacing W between the two rovings R1 and R2 is changed by changing the spinning conditions, the regulating member having a predetermined diameter is used. Replacing with 9 becomes extremely easy.

Further, since the regulating member 9 is formed in a rod shape, the manufacturing cost is lower than that of a collector having a narrow groove or a guide portion continuous with the narrow groove. (Second Embodiment) Next, a second embodiment will be described with reference to FIG.
In this embodiment, the attachment state of the regulating member 9 is different from that of the above-described embodiment, and the other configurations are the same. A roving plate 12 is disposed between the second roller 4 and the back roller 5 at a predetermined position to prevent dripping of the coarse yarn. The lower end of the regulating member 9 is fitted in a fitting hole (not shown) formed in the roving plate 12, and is fixed so as to extend in a state orthogonal to the back roller 5 and orthogonal to the traveling direction of the roving yarn. ing.

Also in the apparatus of this embodiment, the two roving yarns sent out from the back roller 5 are set to a predetermined distance W by the regulating member 9 in the same manner as in the above-mentioned embodiment, and the second roller 4 is set. Sent to. In this embodiment, since the roving plate 12 is fixed at a predetermined position, the regulating portion 9
When the traverse width of the trumpet 7 is larger than the diameter of a, it is difficult to maintain the distance between the two rovings R1 and R2 at a predetermined value. That is, in the case of this embodiment, when the distance between the two roving yarns is set relatively wide, or when the trumpet 7 is used.
Suitable for spinning machines that do not traverse.

(Third Embodiment) Next, a third embodiment will be described with reference to FIG. This embodiment differs from both of the above embodiments in that the set value of the interval between the two rovings can be changed without replacing the regulating member 9. That is, a pair of regulating members 9 having a substantially L shape are rotatably supported at their base ends with respect to the support shaft 13 protruding from the tip of the supporting member 8. Both regulating members 9 are fixed by tightening with a nut 14.

When changing the set distance between the two roving yarns in the regulating member 9, the distance between the pair of regulating members 9 is adjusted to a desired value in a state where the nut 14 is loosened, and in that state, the nut 1
Tighten 4. Therefore, in the configuration of this embodiment, the regulating portion 9
The setting interval of the roving can be changed according to the change of the spinning condition without preparing a large number of regulating members 9 having different widths of a, that is, diameters.

The present invention is not limited to the above-mentioned embodiments. For example, the regulating member 9 may be replaced by both rovings R1 and R2.
It may be arranged in an obliquely intersecting state instead of in an orthogonal state. The cross section of the regulating member 9 is not limited to a circle, but a triangle,
Other shapes such as a polygon such as a quadrangle or an ellipse may be used.
Further, the regulation member 9 is not limited to the rod-shaped member, and may have a flat shape as shown in FIG. That is, the regulation member 9 does not regulate the position of each roving by sandwiching each roving, but may have a shape that regulates the passage position of the roving only on one side thereof. Further, the trumpet 7 is not limited to one having one outlet, and a two-trumpet may be used, or two independent trumpets may be provided for each weight. In this case, 2 supplied from the trumpet 7 to the back roller 5
The interval between the roving threads R1 and R2 of the book needs to be narrower than the interval between the restriction portions 9a of the restriction member 9. Further, when the regulation member 9 is provided so as to be movable integrally with the trumpet 7, the regulation member 9
The support member 7 and the support member 7 may be integrally formed. In addition, in the configuration in which the regulating member 9 is fixed to the roving plate 12,
The roving plate 12 may be synchronized with the traverse bar 6 and traversed with the same width as the traverse bar 6. Further, in each of the above-mentioned embodiments, the three-wire type draft part has been described, but the four-wire type draft roller having an increased number of draft rollers may be used. In that case, the regulating member 9 may not be arranged immediately downstream of the back roller, but may be arranged between the second roller and the third roller.

[0028]

As described above in detail, according to the present invention, since the interval between the two fleeces fed from the front roller can be kept constant during spinning, the quality of the spun special yarn is stable. To do. Further, it is possible to prevent the generation of slabs due to the mixing of the grown piled cotton wool into the spun yarns and the yarn breakage due to the slabs. Further, the structure is simpler and the manufacturing cost is lower than that of the conventional device.

When the regulating member is detachable, the setting of the roving interval can be easily changed by replacing the regulating member with a regulating member having a different interval.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a draft part including a roving interval setting device according to a first embodiment.

FIG. 2 is a schematic front view showing a state at the time of spinning in which the top roller is also omitted.

FIG. 3 is a graph showing the relationship between the single yarn strength of spun yarn and the roving interval.

FIG. 4 is a graph showing the relationship between the number of fluffs of spun yarn and the roving interval.

FIG. 5 is a sectional view of a draft part including a roving interval setting device of a second embodiment.

FIG. 6 is a perspective view showing a regulating member of a third embodiment.

FIG. 7 is a perspective view showing a restricting member of a modified example.

FIG. 8 is a schematic front view showing a state of the fleece sent out from the front roller.

FIG. 9 is a schematic perspective view showing a conventional device.

[Explanation of symbols]

2 ... Front roller, 4 ... Second roller, 5 ... Back roller, 6 ... Traverse bar, 7 ... Trumpet, 8 ...
Support member, 9 ... Regulator member, 9a ... Regulator portion, F1, F2 ...
Fleece, R1, R2 ... roving.

Claims (2)

[Claims] 1. A two-ply fleece is produced by simultaneously drafting two rovings in the same drafting area of a spinning machine. The fleece is spun from a front roller and then twisted into a single yarn to spun the yarn. In the spinning machine for producing special yarn to be output, a trumpet is provided upstream of the back roller, and between the back roller and the second roller, two roving yarns moving from the back roller toward the second roller are opposite to each other. Device for setting a roving interval in a spinning machine for producing special yarn, which is provided with a restricting member having a restricting portion that comes into contact only at the position. 2. The roving interval setting device in a spinning machine for producing special yarn according to claim 1, wherein the regulating member is detachably attached to the supporting member.