JPH0717670A - Ending nozzle for pneumatic ending device - Google Patents

Abstract

PURPOSE:To provide an ending nozzle for a pneumatic ending device capable of improving strength and appearance of a joint by providing a pair of air injection holes for generating a turning air flow toward an opposite direction to each other of a thread guide and diagonally relating the thread guide. CONSTITUTION:Each thread end YB, YP for ending, after opened in an opening nozzle, is drawn out by a thread handier lever and positioned in an ending nozzle 1 in a condition that an opened part is piled up. Here, fiber point ends fb, fp of each thread end YB, YP are provided in the outside of respective both opening end parts 8, 9 of the ending nozzle 1, and a length of a part piled to each other is made longer than a length L of the ending nozzle 1. When pressure air is injected from pressure air injection holes 5, 6, in the ending nozzle 1, turning air flows Ab, Ap in an opposite direction to each other toward both the opening end parts 8, 9 from a nozzle central side are generated, and each thread end YB, YP, by the turning air flow, is integrally formed by generating intertwining a single fiber, firmly wood and connected to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn joining nozzle of a pneumatic yarn joining device.

[0002]

2. Description of the Related Art Conventionally, in a pneumatic yarn splicing apparatus, a single fiber is separated by untwisting and defibrating by injecting a high-speed air flow in a direction to untwist the yarns of two spliced yarn ends. In this state, the yarn ends are superposed and blown with pressured air to twist them, and at the same time, the entanglement of the single fibers is caused to integrate the yarn ends to perform the yarn splicing, one example of which is shown in FIG. Will be described below.

In FIG. 4, a pneumatic yarn splicing device 41 has a pair of cylindrical defibrating nozzles 43 and 44 arranged above and below a yarn splicing nozzle block 42, and clamp devices 45 and 46 and a yarn shifting device on both sides thereof. A lever 47 etc. is attached.
The winding side yarn end YP and the yarn supplying side yarn end YB to be spliced together are
The yarn joining nozzle 4 in which the compressed air jet holes 48 of the yarn joining nozzle block 42 are opened by suction members (not shown), respectively.
After being guided into the fiber 9 and supported by the clamp devices 45 and 46, the length from the position of the yarn joining nozzle 49 to the tip is trimmed by a yarn cutting device (not shown). Next, the defibrating nozzles 43 and 44 start sucking the yarn ends YP and YB, and the yarn ends are sucked into the defibrating nozzles 43 and 44 to loosen the twist of the yarn from the thin compressed air injection holes 43a and 44a. The yarn ends YP and YB are violently rotationally vibrated by the high-speed airflow blown into the yarn and untwisted and defibrated. The disentangled yarn ends YP and YB are attached to the yarn shifting lever 47.
Is pulled out from the defibrating nozzle and transferred to the yarn joining nozzle 49 in the yarn joining nozzle block 42, where air is jetted from the compressed air jet holes 48 for twisting and at the same time envelop of single fibers is spliced.

In the above pneumatic yarn splicing device 41, the length of the yarn splicing nozzle 49 is shorter than the length of the overlapping portion of the yarn ends YP and YB, that is, the joint portion, and is perpendicular to the yarn path. The swirling airflow generated by the compressed air injection from the provided compressed air injection holes 48 is diffused outside the nozzle, and vibrations caused by ballooning of the parent yarn on both sides of the yarn joining nozzle 49 during yarn joining cause the fibers at the yarn ends YP and YB. There is a risk that the tip of the seam will be separated from the parent yarn at both ends of the seam to form so-called corners, impairing the appearance and strength of the seam.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a yarn joining nozzle of a pneumatic yarn joining device capable of improving the appearance and strength of a joint. To do.

[0006]

Means for Solving the Problems A pair of compressed air injection holes for generating a swirling airflow are provided obliquely with respect to the yarn path in directions opposite to each other.

[0007]

When the compressed air is jetted by the pair of compressed air jet holes obliquely provided with respect to the yarn path, a swirling air current is generated from the inner side of the yarn joining nozzle toward both ends of the yarn path. The fibers are strongly wound and spliced together while forming an envelope, and the pair of compressed air injection holes are provided obliquely with respect to the yarn path, so that the swirling airflow has a strong straight traveling property, and along the yarn path. It extends to the outside of the nozzle and extends over the entire joint portion, whereby the tip of the fiber at the joint yarn end is spirally wound in the longitudinal direction of the master yarn.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the embodiment will be described with reference to the drawings.
The overall construction of the pneumatic yarn splicing device provided with the yarn splicing nozzle of the present invention is the same as that of the conventional example shown in FIG. 4, and therefore its explanation is omitted, and only the yarn splicing nozzle will be explained below.

1 and 2 show a yarn joining nozzle 1 according to an embodiment of the present invention. In the drawing, the yarn splicing nozzle 1 is formed in a cylindrical shape by penetrating the side wall surfaces 3 and 4 at the center of the nozzle block 2, and a pair of two compressed air jet holes 5 are provided in the tangential direction of the inner circumferential surface of the yarn splicing nozzle 1. , 6 are provided, and a slit 7 for inserting a yarn into the yarn joining nozzle 1 is provided with a nozzle block 2 over the entire upper longitudinal direction of the yarn joining nozzle 1.
Is formed by cutting out.

The compressed air injection holes 5 and 6 are shown in FIG.
Each of them is provided obliquely from the center side of the yarn splicing nozzle 1 toward the respective opening ends 8 and 9 with a middle inclination angle θ. The inclination angle θ is about 3 to 30 °. In addition, each compressed air injection hole 5,
A compressed air supply pipe (not shown) is communicated with the cavities 10 and 11 behind 6 and by supplying compressed air to the cavities 10 and 11 from the compressed air supply pipe, the compressed air injection holes 5 and 6 into the yarn splicing nozzle 1. It is possible to inject compressed air. The opening positions of the compressed air injection holes 5 and 6 are the distance L from the corresponding nozzle side wall surfaces 3 and 4.
Is the length of the yarn splicing nozzle 1, that is, the distance d between the side wall surfaces 3 and 4.
On the other hand, it is necessary to set it to one-third to one-fourth, and to displace the compressed air injected from the compressed air injection holes 5 and 6 so as not to collide with each other.

Next, the operation will be described based on the embodiments.

When the yarn ends YB and YP to be spliced are disentangled by the disentanglement nozzles 43 and 44 shown in FIG.
P is located in the yarn splicing nozzle 1 with the defibrated portions overlapped as shown in FIG. 3, and the yarn ends Y overlapped at this time
The fiber tips fb and fp of B and YP are outside the open ends 8 and 9 of the yarn joining nozzle 1, respectively, and the length Ls of the overlapped portion is longer than the length L of the yarn joining nozzle 1. ing.

In this state, when the compressed air is injected from the compressed air injection holes 5 and 6, in the yarn splicing nozzle 1, swirling air flows Ab and Ap which are opposite to each other from the center side of the nozzle toward both opening ends 8 and 9. , The respective yarn ends YB, Y
The P is entangled with the single fibers to be integrated, and is strongly wound and spliced with each other.

Further, the swirling air flow Ab, which accompanies the compressed air injection,
Since the compressed air injection holes 5 and 6 are provided so as to be inclined toward the opening ends 8 and 9 with respect to the yarn path C, the Ap has a strong straightness, and the swirling airflows Ab and Ap are , Open end 8,
Even if it goes out of the yarn splicing nozzle 1 from 9, it is not immediately diffused, is extended along the yarn path C while maintaining the turning state to some extent, and extends over the entire length LS of the above-mentioned overlapped portion which becomes the seam S. The yarn ends YB and Y on both sides of the seam S
The monofilaments fb and fp of P are spirally wound around the parent yarn Y.

The yarn splicing nozzle of the pneumatic yarn splicing device of the present invention is of course also effective for single yarns, but is especially effective for twin yarns that are difficult to untwist and tend to have corners at both ends of the joint. is there.

[0016]

The yarn joining nozzle of the pneumatic yarn joining device of the present invention is
As described above, since a pair of compressed air injection holes that generate a swirling air flow are provided in the directions opposite to each other and obliquely with respect to the yarn path, the seam yarn ends are entangled with each other while the single fibers are entangled with each other. While being tightly wound, the swirling airflow has a strong straightness and spreads over the entire seam outside the nozzle, so that the monofilaments at each yarn end can be neatly wrapped in a spiral shape without forming corners in the parent yarn, The strength and appearance of can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a yarn joining nozzle according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing a yarn joining nozzle according to an embodiment of the present invention.

FIG. 3 is an enlarged plan view showing yarn joining by the yarn joining nozzle of the embodiment of the present invention.

FIG. 4 is a side sectional view showing a pneumatic yarn splicing device.

[Explanation of symbols]

 1 Yarn splicing nozzle 5,6 Pneumatic injection hole 8,9 Opening end θ Inclined angle Ab, Ap Swirling air flow YB, YP Yarn end

Claims (1)

[Claims] 1. A yarn splicing device of a pneumatic yarn splicing device, characterized in that a pair of compressed air injection holes for generating a swirling airflow are provided in directions opposite to each other and obliquely with respect to the yarn passage. nozzle.