JPH07125931A - Splicer for synthetic fiber yarn - Google Patents

Abstract

PURPOSE:To improve piecing strength by shifting the intersection of center lines of air injection holes to the slit side from the passage center, disturbing the flow of the collision stream toward the bottom of the passage, making the swirl stream in the passage a complex stream, and complicating the twisting of a filament made of synthetic fiber yarns. CONSTITUTION:A triangular socket 51 and a slit 52 connected to it are opened on the block-like main body 50 of a splicer used for piecing synthetic resin yarns such as feed yarn fed to a drawing/false-twisting machine, a passage 53 having a circular cross section is penetrated at the end of the slit 52, and a pair of air injection holes 54, 55 toward the passage 53 from both sides of the slits 52 are provided at the middle in the axial direction of the passage 53. The intersection A of center lines (a), (b) of the air injection holes 54, 55 is decentered by epsilon to the slit 52 side from the center O of the passage 53. Compressed airs from the air injection holes 54, 55 collide with each other at a point A, the flow to the bottom B is disturbed, the loosening and twisting of a filament of synthetic fiber yarns are accelerated by the complex swirl stream, and the strength of a piecing section is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a splicer used in a yarn splicing device for a synthetic fiber such as a yarn supplied to a draw false twisting machine.

[0002]

2. Description of the Related Art Filament yarn, which is a synthetic fiber, is generally subjected to a draw false twisting process, but when the packages after the draw false twisting machine are automatically doffed using an auto doffer, they are supplied to the draw false twisting machine. The unwinding of the yarn from the false twist yarn supply package also needs to be continuous. Therefore, the end tail of the false twist supply package mounted on the creel stand and unwound is joined to the start end of the preliminary false twist supply package.

If the yarns are spliced between the tails in the state of undrawn yarn, only that portion is thickened. When a yarn having such a thick portion is subjected to draw false twisting, the processing before or after the thick portion becomes uneven, resulting in a yarn defect.
Therefore, each tail is drawn in advance, the drawn parts of the tail are guided to a splicer, and twisted by an air stream to form a yarn splice.

A conventional example of this splicer will be described with reference to FIG. 5A is a sectional view and FIG. 5B is a top view. The block-shaped main body 50 is provided with a triangular receiving opening 51 and a slit 52 following it, and a passage 53 having a circular cross section is penetrated at the end of the slit 52. The passage 53 is formed from the both sides of the slit 52 in the axial center. A pair of air injection holes 54 and 55 directed to 53 are provided.

Then, due to restrictions such as the arrangement of the header 56, the intersection A of the center lines a and b of the air injection holes 54 and 55 is A.
Is on the diameter line c passing through the slit 52 of the passage 53 and is eccentric to the side opposite to the slit 52 from the center O of the diameter, or at the position of the center O. Note that the header 56
An air supply passage is appropriately provided, and an air pipe can be connected thereto.

For such a splicer, FIG.
As shown in (b), the tails T1 and T2 in which the synthetic yarn is drawn
Are introduced through the slit 51 and are aligned in the passage 53. Then, compressed air is injected from the air injection holes 54 and 55. The compressed air colliding at point A in FIG.
Directly underneath, the direction is changed to both sides, and swirl flow is generated on both left and right sides of the passage. By this swirling flow, the filaments forming the synthetic fiber are twisted and spliced together.

[0007]

Since the drawn false twisting machine also draws the synthetic fiber, a predetermined tension acts on the synthetic fiber. Therefore, if the degree of twisting at the yarn joining portion is insufficient, there is a problem that yarn breakage occurs.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a splicer for synthetic fiber capable of increasing the splicing strength. It is in.

[0009]

A splicer for synthetic fiber, which achieves the above object, has a slit for introducing a stretched tail of synthetic fiber and two tails introduced from the slit in a main body. A passage having a circular cross section that is aligned in the same direction, and a pair of air injection holes that are located on both sides of the slit and open into the passage, and the intersection of the center lines of the air injection holes is the passage that passes through the slit. The gist of the present invention is that it is located on the diametric line of the above and is eccentric to the slit side from the center of the diameter.

[0010]

[Function] The point where the compressed air from the air injection hole collides is located away from the passage, the flow is disturbed until it hits the bottom of the passage, and the swirling flow in the passage becomes a complicated flow, and the filament of the synthetic fiber The twisting of the yarn becomes complicated and the strength of the yarn splicing part increases.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a splicer of the present invention.

1 is different from FIG. 5 in that the intersection A of the center lines a and b of the air injection holes 54 and 55 is eccentric to the slit 52 side from the center O of the passage 53 having a circular cross section by ε. It is a point that is shifted to a position away from the bottom of.
Further, the slit 52 is made long because of the arrangement of the air injection holes 54 and 55. The other parts are the same as those described with reference to FIG.

The compressed air from the air injection holes 54 and 55 is A
It collides at a point and becomes a flow toward the bottom B of the passage. Since the distance from point A to point B is long, the flow to the bottom B is disturbed.
The turbulent flow is divided into left and right at the bottom B to form a swirl flow, but the swirling flow becomes a complicated flow due to the increased turbulence, and the filaments of the synthetic fiber are loosened and twisted sufficiently, and the splicing is performed. The strength of the part is improved.

Next, a yarn splicing device using the above-mentioned splicer will be described with reference to FIG. Splicer 1
Accommodates the pneumatic cylinder 3 as one drive device and the cam plate 4 in the main body case 2,
On the upper surface of the first lever 5, a pair of cutters 6, 7,
A fixed thread guide 8, a pair of clamps 9 and 10, a splicer 11, a pair of second levers 12 and 13, and a push button 14 are arranged.

The first lever 5 has a chuck urged in the closing direction at its tip and can hold a thread, and can move in the g direction by a swinging motion. The two cutters 6, 7 and the thread guide 8 are the first lever 5 and the splicer 1.
1 between the first lever 5 and the two tails T1 and T2 gripped by the first lever 5 so as to be able to be introduced into the splicer 11 in opposite directions. The yarn guide 8 has two guide grooves 27, 28, and cutters 6, 7 composed of a fixed blade and a movable blade are arranged along the guide grooves 27, 28. The clamps 9 and 10 rotatably support the arms 41 and 42 having L-shaped bent portions 39 and 40 that press the threads against the vertical V grooves 37 and 38 on both side surfaces of the housing 36 of the splicer 11, and are normally closed. It is biased in the direction, and when closed, tails T1, T2
Is pressed against the V grooves 37 and 38 and clamped.

The second levers 12 and 13 are provided in a state in which the plates holding the thread are urged in the closing direction by a pressing spring, and can be moved in two steps of the e direction and the f direction by the swinging operation. Has become. The splicer 11 is similar to that described in FIG. 1, and the compressed air source is connected via the valve switch 72a or 72b. And the valve switch 7
2b is for generating a weak air flow, and the valve switch 72b is for generating a strong air flow.

The above-described first lever 5, cutter 6,
7, the clamps 9 and 10, the second levers 12 and 13, and the valve switch 72a or 72b are one pneumatic cylinder 3
The cam plates 4 that travel and move in the above order operate in a predetermined order.

The operation of such a yarn splicing device will be described with reference to FIGS. 3 and 4. First, FIG. 2 shows the first set state performed manually. The two tails T1 and T2 are connected to the first lever 5
Grip it with the tip of the. One tail T1 is put into the guide groove 27 of the yarn guide 8 and further splicer 11
It is put inside and is sandwiched by the tip of the second lever 13. The other tail T2H is put into the guide groove 28 of the yarn guide 8, and further put into the splicer 11 to be aligned in parallel, and is sandwiched by the tip of the second lever 12 to be in the state shown in the drawing. Then, when the push button 14 is pressed, yarn joining is automatically performed as follows.

In FIG. 3 (a), first, the clamp 10 is closed as shown by the arrow a, and the tail T is connected to the housing 36.
Stop T1 and T2 from slipping. Next, when the push button 14 is continuously pressed, the first lever 5 swings as shown by an arrow b in FIG. 3B, and the tails T1 and T2 extending from the clamp 10 to the first lever 5 are pulled and extended. Then, in FIG. 3 (c), the cutters 6 and 7 are closed as indicated by the arrow c, and the stretched portion E reaching the clamp 10 is stretched.
1, E2 is cut into a predetermined length. Then, in FIG. 4A, the clamp 10 opens as shown by the arrow d, and the second lever 1
2 and 13 oscillate in the first stage as indicated by arrow e, and the extended portions E1 and E2 are drawn into the splicer 11. However, the terminals 16 and 17 are not drawn in completely, as shown in the figure.
Stop while protruding on both sides. Then, the weak air flow in the splicer 11 is twisted so that it does not reach a predetermined value, and is temporarily fixed. Then, as shown in FIG. 4B, the second levers 12 and 13 swing in the second stage as shown by the arrow f, and the terminal is embedded in the temporarily fixed portion. Then, a predetermined twisting is applied with a strong air flow in the splicer 11 to obtain a yarn splicing portion having a desired strength.

After that, when the push button 14 is released,
It returns to the state of FIG. Then, the spliced yarn is manually ejected from the splicer 11 and the tails T1 and T2 are detached from the second levers 12 and 13 to complete the splicing.
In this way, except for the first and last setting work,
A series of yarn splicing operations are automatically performed by simply pushing and releasing the push button 14.

When a yarn having such a strong yarn splicing portion is processed by a draw false twisting machine, unevenness in the stretch false twisting process before and after the yarn splicing portion is reduced.

[0022]

The splicer for synthetic fiber of the present invention shifts the intersection of the center lines of the air injection holes from the center of the passage to the slit side, disturbs the flow of the collision flow toward the bottom of the passage, and swirls the flow in the passage. Since the filaments of the synthetic fiber are twisted in a complicated manner by increasing the strength of the yarn splicing portion, it is possible to form a yarn splicing portion with less yarn breakage. Further, since the yarn splicing portion is firmly formed, the occurrence of unevenness in the drawing false twisting process before and after the yarn splicing portion is reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a splicer of the present invention.

FIG. 2 is a top view of a yarn splicing device in which the splicer of the present invention is used.

FIG. 3 is an operation diagram of the yarn splicing device.

FIG. 4 is an operation diagram of the yarn splicing device.

FIG. 5 is a diagram showing a conventional splicer.

[Explanation of symbols]

 11 Splicer 50 Main body 52 Slit 53 Passage 54,55 Air injection hole a, b Center line of air injection hole c Diameter line passing through slit of passage A Intersection of center line of air injection hole O Center of passage

Claims (1)

[Claims] 1. A slit for introducing a stretched tail of a synthetic fiber into a main body, and a slit 2 introduced through the slit.
A passage having a circular cross section that aligns the tails of the book in the opposite direction, and a pair of air injection holes that are located on both sides of the slit and open into the passage, and the intersection of the center lines of the air injection holes is On the diameter line of the passage through the slit,
A splicer for synthetic fiber, wherein the splicer is located eccentrically to the slit side from the center of the diameter.