JP2006052043A - Splicer nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a splicer nozzle capable of reliably splicing carbon filament yarns and chemical synthetic filament yarns of small fiber surface resistance, and yarns of high rigidity compared with spun yarns consisting of staple fibers. <P>SOLUTION: The splicer nozzle 2 comprises a pair of air ejection ports 11, 12, an air flow passage 20 to connect the ejection ports 11, 12, and an air feed port 10 which is opened in an inner wall face of the air flow passage 20. The air flow passage 20 consists of a first air flow passage 20f and a second air flow passage 20s from a center air flow passage 20m in the vicinity of a part forming the air feed port 10 to the ejection ports 11, 12, the opening sectional area thereof are continuously increased, and each inner wall face is formed of a smooth continuous surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique of a splicer nozzle that joins yarns of yarns made of fiber bundles with each other by an air flow.

  2. Description of the Related Art Conventionally, a technique of a splicer nozzle that links yarns by tying fibers of a fiber bundle by an air flow is known.

The splicer nozzle disclosed in Patent Document 1 mainly includes two members (a lower yarn joining member and an upper yarn joining member). In a state where these two members are combined, a yarn joining hole (air flow path) is set in which a portion where the yarn ends of the pair of yarns are aligned and overlapped is set. The shape of the yarn joining hole is cylindrical (cylindrical inner wall surface shape), and a hole (supply port) for ejecting air is formed in the yarn joining hole.
When the air supplied from the hole to the air flow path is ejected from both end sides of the air flow path in which the stacked yarn end portions are accommodated (set), The yarn fibers are entangled with each other, and the yarns are connected.
JP 2004-27463 A

Compared with spun yarn made of staple fiber, etc., when the resistance of the surface of the fiber constituting the yarn is small, such as carbon filament yarn or synthetic filament yarn, or when the stiffness of the yarn is high, the conventional splicer nozzle Then, it was difficult to connect the yarns together. In the case of such a yarn, there is a defect that the yarn is easily disconnected when pulled, and the yarn is incompletely connected.
In other words, in the air flow obtained with a conventional splicer nozzle, it is necessary to entangle the fibers with small surface resistance to the extent that the yarns can be entangled with each other as much as possible or to entangle the fibers with high rigidity. It was insufficient.

  In other words, the problem to be solved is a carbon filament yarn having a low fiber surface resistance compared to a spun yarn made of staple fibers, a filament yarn of chemical synthesis, or a yarn having high rigidity. This is the point that secures the yarn connection.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in claim 1,
Provided with an air flow path for inserting a yarn overlap portion in which yarns made of fiber bundles are overlapped on each yarn end side,
By splicing the fibers of both yarns by the air flow flowing into the air flow path, a splicer nozzle that connects the yarns,
Spouts are formed at both ends of the air flow path, and an air supply port is formed in the inner wall surface of the air flow path.
The air flow path is formed so as to increase the size of the opening cross-sectional area in a region extending from the periphery of the supply port formation region to at least one of the jet ports.

In claim 2,
The supply port is formed to open at the center of the air flow path,
The shape of the part from the periphery of the formation part of the supply port to each of the jet ports is formed symmetrically with the periphery of the formation part.

In claim 3,
In the air flow path, the shape of the portion extending from the vicinity of the supply port formation region to at least one of the jet ports is a truncated cone shape whose cross-sectional area expands in this direction.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, by using sonic high-speed air, the fibers constituting the yarn can be vigorously shaken in a random direction in the air flow path, and the fibers of both yarns are intertwined in a complicated manner. Yarn splicing is ensured.

  In the second aspect, in addition to the effect of the first aspect, the fibers of both yarns are intricately entangled at two locations, and the yarn joining of both yarns is further ensured.

  In the third aspect, in addition to the effect of the first or second aspect, the air flow path can be easily formed, and the cost is not increased.

First, a splicer 1 as an embodiment of the present invention will be described with reference to FIGS. The splicer 1 includes a splicer nozzle 2 that is an embodiment of the present invention.
In the first to third embodiments described below, the arrangement and arrangement of the yarns to be yarn-connected and the portions and directions for fixing the yarns are different, and the configurations of the splicer 1 and the splicer nozzle 2 are the same. It is.

  Here, the yarn to be spliced by the splicer 1 may be a yarn in which fibers are bundled, regardless of whether it is a spun yarn of staple fibers or a yarn in which filaments are aligned. .

First, the configuration of the splicer 1 will be described with reference to FIG.
The splicer 1 is a device that joins yarns made of fiber bundles by entwining fibers constituting both yarns by an air flow. The splicer 1 is provided with a splicer nozzle 2 in which an air flow path 20 is formed, and clamp devices 3 and 3 that fix the yarn with a thread interposed therebetween.

As shown in FIG. 1, in Example 1, two yarns 4 and 5 to be connected are overlapped with each other in opposite directions, and the overlapped yarn overlapped portion is a splicer nozzle 2. Is inserted into the air flow path 20 formed.
Further, the yarn overlapping portions are fixed by being sandwiched by indenters 31 and 32 provided in the respective clamp devices 3 on both outer sides of the air flow path 20. In other words, the yarns 4 and 5 are fixed at two locations where the yarn overlaps, and a portion between the fixed locations is arranged in the air flow path 20.

The splicer nozzle 2 is formed with a pair of air outlets 11 and 12 opened, and the air flow path 20 is formed so as to connect the outlets 11 and 12. A supply port 10 for supplying air into the air flow path 20 is formed at the center of the air flow path 20. Air is supplied to the supply port 10 from a compressor (not shown).
For this reason, by driving the compressor, an air flow is generated from the supply port 10 toward the ejection port 11, and an air flow is generated from the supply port 10 toward the ejection port 12.
Here, the air flow path 20 includes a central air flow path 20m around the site where the supply port 10 is formed, a first air flow path 20f extending from the central air flow path 20m to the ejection port 11, and jetting from the central air flow path 20m. A second air flow path 20 s leading to the outlet 12.

The first air flow path 20f and the second air flow path 20s have symmetrical inner wall shapes and are tapered from the ejection port 11 or the ejection port 12 toward the supply port 10, respectively.
As will be described in detail later, when air is supplied into the air flow path 20, shock waves are generated in the first air flow path 20f and the second air flow path 20s due to the inner wall surface shape of these flow paths. Will occur. In the yarn overlap portion of the yarns 4 and 5 located at the location (generation surface) where the shock wave is generated, the fibers constituting the yarns 4 and 5 are vibrated vigorously in random directions due to the pressure difference across the shock wave front. .

For this reason, as shown in FIG. 2, the yarn overlapping portions of the yarns 4 and 5 arranged in the air flow path 20 are in two places, the first air flow path 20f and the second air flow path 20s. The fibers are intertwined and joined together.
In FIG. 2, the portions where the fibers are entangled with each other due to the shock wave are the entangled portions 41 and 42.

As shown in FIG. 3, the place where the thread to be threaded is fixed by the clamp device 3 is not the thread overlapping part, but the root side of each thread 4, 5 (opposite to the end where thread joining is performed). It may be.
In this case, the fixing of the yarn in the yarn overlapping portion is slower than in the case where both ends of the yarn overlapping portion are fixed (FIG. 1), and the vibration of the yarn by the shock wave is performed more flexibly.

As shown in FIG. 4, the two yarns 4 and 5 are overlapped in the forward direction with each yarn end portion to form a yarn overlapping portion inserted into the air flow path 20, and the root side (yarn joining portion) of the yarn overlapping portion is formed. It is good also as what is fixed with the clamp apparatus 3 in one place (opposite the edge part which performs).
In this case, as indicated by a two-dot chain line in the figure, when the yarns 4 and 5 are pulled in the opposite direction, the portion that becomes a joint with respect to the extending direction of the yarns 4 and 5 faces in the lateral direction. However, the connection between the threads 4 and 5 is stronger than that shown in FIG.
Even in the case of the arrangement configuration in which the yarns 4 and 5 are arranged in the forward direction as in the third embodiment, both ends of the yarn overlapping portion are fixed as in the first embodiment with respect to the fixing portion of the yarn overlapping portion. It is good to do.

Next, the configuration of the splicer nozzle 2 will be described in more detail with reference to FIGS.
As shown in FIG. 5, the splicer nozzle 2 can rotate the second nozzle divided piece 7 with respect to the first nozzle divided piece 6 and the second nozzle divided piece 7 and the first nozzle divided piece 6 on the fixed side. And a supporting mechanism.
Here, in the state where the first nozzle divided piece 6 and the second nozzle divided piece 7 are combined, grooves (described later) formed in the first nozzle divided piece 6 and the second nozzle divided piece 7 are combined, In this configuration, the air flow path 20 is formed. The reason why the air channel 20 can be opened and closed in this manner is to facilitate the insertion of the yarns 4 and 5 into the air channel 20.
In addition, the rotation support mechanism for the second nozzle divided piece 7 described above includes a holder frame 8 fixed to the second nozzle divided piece 7 and a holder frame 8 that is rotatably supported by the first nozzle divided piece 6. And a holder shaft insertion hole 6 a formed in the first nozzle divided piece 6.

The parts involved in the formation of the air flow path 20 in the first nozzle divided piece 6 and the second nozzle divided piece 7 will be described with reference to FIGS.
When the second nozzle divided piece 7 is closed with respect to the first nozzle divided piece 6, the first nozzle divided piece 6 is applied to the first nozzle divided piece 6 as a surface where the first nozzle divided piece 6 and the second nozzle divided piece 7 are in contact with each other. Contact surfaces 6 b and 6 c are formed, and contact surfaces 7 b and 7 c are formed on the second nozzle divided piece 7. And when the 1st nozzle division piece 6 and the 2nd nozzle division piece 7 close, the contact surface 6b and the contact surface 7b contact | abut, and the contact surface 6c and the winning surface 7c contact | abut.

The contact surfaces 6b and 6c are surfaces located on the same plane, and between the contact surfaces 6b and 6c, a first groove 6f and a central groove 6m, which are part of the inner wall surface of the air flow path 20, are provided. The second groove 6s is formed by piercing the first nozzle divided piece 6 inward from the contact surfaces 6b and 6c. The grooves 6f, 6m, and 6s are continuous, and the contact surfaces 6b and 6c are divided by the grooves 6f, 6m, and 6s.
Similarly, the abutting surfaces 7b and 7c are surfaces located on the same plane, and the first groove 7f that is a part of the inner wall surface of the air flow path 20 and the center between the abutting surfaces 7b and 7c. A groove 7m and a second groove 7s are formed by piercing the second nozzle divided piece 7 inward from the contact surfaces 7b and 7c. The grooves 7, 7m, 7s are also continuous, and the contact surfaces 7b, 7c are divided by these grooves 7f, 7m, 7s.

The grooves 6f, 6m, and 6s and the grooves 7f, 7m, and 7s are formed at positions that face each other when the second nozzle divided piece 7 is closed with respect to the first nozzle divided piece 6, respectively. That is, the first groove 6f and the first groove 7f face each other, the central groove 6m and the central groove 7m face each other, and the second groove 6s and the second groove 7s face each other.
When this is closed, the air flow path 20 is formed as a space surrounded by the grooves 6f, 6m, and 6s and the grooves 7f, 7m, and 7s.

As described above, the air flow path 20 is configured by connecting the first air flow path 20f, the central air flow path 20m, and the second air flow path 20s in this order. Both ends of the air flow path 20 are the ejection ports 11 and 12. Here, the spout 11 is located at the end of the first air flow path 20f, and the spout 12 is located at the end of the second air flow path 20s.
The first air flow path 20f and the second air flow path 20s have the same shape and are arranged symmetrically with the central air flow path 20m interposed therebetween. The first air flow path 20f has an elliptic frustum shape that widens toward the outlet 11 from the central air flow path 20m. Similarly, the second air flow path 20s also faces the outlet 12 from the central air flow path 20m. It has an elliptical frustum shape that spreads out at the end. The central air flow path 20m in which the supply port 10 is opened has a cylindrical shape.

As shown in FIG. 1, the first air flow path 20f is formed as a region surrounded by a plane formed by combining the surface of the first groove 6f and the surface of the second groove 7f. The surface of the first groove 6f and the surface of the second groove 7f correspond to two surfaces obtained by dividing the side surface of the elliptical frustum that coincides with the inner wall surface of the first air flow path 20f just in half. Since the longitudinal direction of this elliptical frustum coincides with the pressure contact direction between the first nozzle divided piece 6 and the second nozzle divided piece 7, the cross-sectional shapes of the first groove 6f and the second groove 7f are U-shaped. is there.
Similarly, the second air flow path 20s is formed as a region surrounded by a surface formed by combining the surface of the first groove 6s and the surface of the second groove 7s. The surface of the groove 7s also corresponds to two surfaces obtained by dividing the side surface of the elliptical frustum just in half.
The central air flow path 20m is formed as a region surrounded by a plane formed by combining the surface of the central groove 6m and the surface of the central groove 7m. The surface of the central groove 6m and the surface of the central groove 7m correspond to two surfaces obtained by dividing the cylindrical side surface coinciding with the inner wall surface of the central air flow path 20m just in half.

As shown in FIGS. 1 and 6, the supply port 10 is open to the surface of a central groove 6 m which is one groove forming the central air flow path 20 m.
Here, an air supply path 21 whose diameter changes in two stages is formed from the lower surface (outer surface on the side opposite to the central groove 6m) of the first nozzle split piece 6 where the central groove 6m is formed, to supply air. The channel 21 and the air channel 20 are connected through the supply port 10 and communicate with each other. An air pipe 22 is attached to the air supply path 21, and air can be supplied from the compressor (not shown) through the air pipe 22.

The configuration of the air flow path 20 that generates a shock wave will be described.
The air flow path 20 has a shape in which a first flow path 20f and a second flow path 20s are connected to both ends of a central air flow path 20m located around the formation site of the supply port 10, respectively.
Here, the central air flow path 20m has a cylindrical shape, the first flow path 20f and the second flow path 20s have a frustum shape (more specifically, an elliptic frustum shape), and are formed at both ends of the central air flow path 20m. The end surfaces on the small diameter side of the first flow path 20f and the second flow path 20s are connected. The cross-sectional areas of the first flow path 20f and the second flow path 20s are uniformly increased from the central air flow path 20m toward the jet outlets 11 and 12, respectively, and the opening cross-sectional area is equal to the jet outlets 11 and 12. Is the largest.

  In the air flow path 20, as described above, the air supplied from the supply port 10 is ejected from the ejection port 11 via the first flow path 20f from the central air flow path 20m where the supply port 10 is opened, and the center. From the air flow path 20m, it ejects from the jet outlet 12 through the second flow path 20s. That is, in the air flow path 20, roughly divided, two air flows, an air flow toward the ejection port 11 and an air flow toward the ejection port 12 are formed.

The air flow supplied from the supply port 10 into the air flow path 20 is high-speed air having a sonic velocity. This high-speed air flow has a passage cross-sectional area that is enlarged as it goes toward the jet outlet 11 in the first flow path 20f having a truncated cone shape (or toward the jet outlet 12 in the second flow path 20s). As the pressure drops, the flow rate increases.
On the other hand, the pressure of the air outside the jet nozzles 11 and 12 is atmospheric pressure.
For this reason, a shock wave is generated between the high-speed air flow and the outside air of the ejection ports 11 and 12 in the first flow path 20f and the second flow path 20s. Before and after the shock wave front, the pressure and the flow velocity are increased discontinuously and rapidly, and vibration is generated in the fibers in the yarn overlap portion straddling the shock wave front. Then, the fibers of both the yarns 4 and 5 are intertwined randomly by causing the fibers to swing by this vibration.
Note that if the nozzle shape (the first flow path 20f and the second flow path 20s in the present embodiment) is a rubber nozzle shape, the speed of sound can be exceeded, and high-speed air exceeding the speed of sound can also be used.

Before and after the shock wave front, the pressure and the flow velocity are increased discontinuously and rapidly, and vibration is generated in the fibers in the yarn overlap portion straddling the shock wave front. Then, the fibers of both the yarns 4 and 5 are intertwined randomly by causing the fibers to swing by this vibration. It is the entanglement part 41 * 42 in FIG.
Thus, since the fiber is swung in a random direction, the pattern of the fiber entanglement is complicated, and it is difficult for the yarns 4 and 5 to be disconnected in any direction.

The configuration of the inner wall surface of the air flow path that generates such a shock wave is not limited to the side shape of the truncated cone as in the first flow path 20f and the second flow path 20s of the present embodiment.
First, in order to generate a shock wave, it is necessary to increase the cross-sectional area of the air flow path toward the jet outlet, and to generate a pressure drop in the air flow toward the downstream.
In particular, if the inner wall surface of the air flow path is a discontinuous surface, pressure loss or a shock wave is generated at the discontinuous position. Therefore, it is preferable that the inner wall surface is formed as a continuous surface.
Further, in order to ensure the effect of pressure reduction due to the expansion of the cross-sectional area of the air flow path, diffusion of the air discharged from these jet outlets 11 and 12 is provided around the jet outlets 11 and 12 outside the air flow path. It is desirable that space is secured.

The splicer nozzle of the present invention will be summarized.
The splicer nozzle according to the first invention is provided with an air flow passage for inserting a yarn overlap portion in which yarns made of fiber bundles are overlapped on each yarn end side, and by an air flow flowing into the air flow passage, It is a nozzle of a splicer that connects yarns by entwining the fibers of both yarns.
In the splicer nozzle, jet ports are formed at both ends of the air flow path, and an air supply port is formed in the inner wall surface of the air flow path.
The air flow path is formed so as to increase the size of the opening cross-sectional area in a region extending from the periphery of the supply port formation region to at least one of the ejection ports.

In the present embodiment, the splicer nozzle 2 is mainly configured by combining the first nozzle divided piece 6 and the second nozzle divided piece 7. The grooves 6f, 6m, and 6s formed in the first nozzle divided piece 6 and the grooves 7f, 7m, and 7s formed in the second nozzle divided piece 7 are combined to form the air flow path 20. Jet ports 11 and 12 are formed at both ends of the air flow path 20. The air flow path 20 is configured by combining a central air flow path 20m, a first air flow path 20f, and a second air flow path 20s. An air supply port 10 is opened in the central air flow path 20 m located at the center of the air flow path 20.
And this air flow path 20 is the part from the central air flow path 20m located around the formation part of the supply port 10 to the jet outlet 11 and the jet outlet 12, that is, the first air flow path 20f and the second air flow path 20s. Is formed in a truncated cone shape. Therefore, the first air flow path 20f and the second air flow path 20s continuously increase in size of the opening cross-sectional area, and the inner wall surface is a smooth continuous surface.

In addition, the shape of the air flow path in which the size of the opening cross-sectional area increases is not limited to the truncated cone shape of the present embodiment. The curvature of the inner wall surface may change to a streamline shape in the axial direction of the air flow path, and the opening shape of the cross-sectional area is not limited to a circle or an ellipse, but may be a polygon.
In addition, in the present embodiment, the air flow path in which the size of the opening cross-sectional area increases includes the first air flow path 20f and the second air flow path 20s, but only one is provided. It may be a configuration.

With the above configuration, when high-speed sonic air is supplied from the supply port, a shock wave is generated in a portion of the air flow path from the vicinity of the formation portion of the supply port to the jet port.
For this reason, by using high-speed sonic air, the fibers constituting the yarn can be vigorously shaken in a random direction within the air flow path, and the fibers of both yarns are intertwined in a complicated manner, and the yarn connection is It will be certain.

The splicer nozzle according to the second aspect of the present invention has the following configuration in the first aspect of the invention.
The supply port is formed so as to open at the center of the air flow path, and the shape of the portion from the periphery of the formation portion of the supply port to each of the ejection ports is formed symmetrically across the periphery of the formation portion. It is what is done.

  In the present embodiment, the shapes of the first air flow path 20f and the second air flow path 20s from the central air flow path 20m located around the formation area of the supply port 10 to the jet outlet 11 and the jet outlet 12 are the same. The center air flow path 20m is formed symmetrically.

With the configuration described above, shock waves are generated both in the region from the vicinity of the supply port formation region to each of the jet ports, that is, in two locations in the air flow path.
For this reason, the fibers of both yarns are intricately entangled at two places, and the yarn joining of both yarns is further ensured.

A splicer nozzle according to a third aspect of the present invention has the following configuration in the first or second aspect.
In the air flow path, the shape of the portion extending from the vicinity of the supply port formation region to at least one of the jet ports is a truncated cone shape whose cross-sectional area expands in this direction.

  For this reason, formation of an air flow path is easy, and a cost increase is not caused.

(Example 1) which is a figure which shows the arrangement | positioning in the case where the ends of both yarns are arranged in the reverse direction by the splicer and the yarns are joined together in a state where both ends of the yarn overlapping portion are fixed. (Example 1) which is a figure which shows the entanglement part of the fiber by a shock wave. (Example 2) which is a figure which shows the arrangement | positioning in the case where the end part of both yarns was arranged in the reverse direction by the splicer, and the yarns were joined together in a state where the yarns were fixed. (Example 3) which is a figure which shows the arrangement | positioning in the case where the end part of both yarns is arranged in the same direction by the splicer, and the yarns are joined together in a state where the root side of the yarn overlapping portion is fixed. It is a perspective view of a splicer nozzle. It is a three-plane figure which shows a 1st nozzle division | segmentation piece, (a) A figure is a top view, (b) A figure is a side view, (c) A figure is AA sectional drawing of (a) figure. It is a two-sided view and a three-sided view showing the second nozzle divided piece, where (a) is a plan view, (b) is a rear view, (c) is a side view, and (d) is B in FIG. It is -B sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Splicer 2 Splicer nozzle 4 * 5 Yarn 10 Supply port 11.12 Spout 20 Air flow path 20m Central air flow path (around supply port formation part)
20f First air flow path (site extending from the vicinity of the supply port forming portion to one of the jet ports)
20s second air flow path (part extending from the vicinity of the supply port formation part to one of the jet outlets)

Claims (3)

Provided with an air flow path for inserting a yarn overlap portion in which yarns made of fiber bundles are overlapped on each yarn end side,
By splicing the fibers of both yarns by the air flow flowing into the air flow path, a splicer nozzle that connects the yarns,
Spouts are formed at both ends of the air flow path, and an air supply port is formed in the inner wall surface of the air flow path.
The air flow path is formed so that the size of the opening cross-sectional area is increased at a portion from the periphery of the supply port formation region to at least one of the ejection ports.
Splicer nozzle characterized by that. The supply port is formed to open at the center of the air flow path,
The shape of the part from the periphery of the formation part of the supply port to each of the ejection ports is formed symmetrically with the periphery of the formation part in between.
The splicer nozzle according to claim 1. The air channel has a frustoconical shape in which the cross-sectional area in this direction is increased in the shape of the part extending from the periphery of the forming part of the supply port to at least one of the ejection ports.
The splicer nozzle according to claim 1 or 2, wherein the splicer nozzle is provided.

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