JPH0524255B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a splicing device for a bundled spinning machine equipped with an air twisting nozzle for producing bundled spun yarn by injecting an air stream onto a fiber bundle.

Prior Art As a yarn splicing method in a bundling and spinning device that twists fiber bundles using an air twisting nozzle, the applicant of the present application has proposed that the yarn end on the package cage side is fed back through the air twisting nozzle, and We previously proposed a method in which the top and bottom aprons were separated and the tips of the fiber bundles were overlapped between them (Japanese Patent Application Laid-Open No. 1986-
Publication No. 59925).

Japanese Utility Model Publication No. 56-42374 discloses an air injection hole that injects air in the running direction of the thread to generate a swirling air flow, and a device that reversely feeds the ends of the thread through the air twisting nozzle. and an air injection hole that injects air in the opposite direction to produce a swirling air flow.
It is disclosed that the air twisting nozzle is formed within a single air twisting nozzle. In this device, the air injection holes for reverse yarn feeding are formed in the same nozzle, which complicates the structure of the air twisting nozzle, and furthermore, there is a risk that the air injection holes for reverse feeding may become clogged with fibers during steady spinning. There is also. Furthermore, the internal volume of the twisting nozzle is expanded by the air injection holes for reverse feeding, which tends to cause problems such as air diffusion and pressure fluctuations during steady spinning.

The present applicant has developed a yarn splicing device for a bundling and spinning device that solves the problems associated with the device described in Japanese Utility Model Publication No. 56-42374 and allows easy threading through the air twisting nozzle. We proposed a yarn splicing device for a binding and spinning machine in which a blowing nozzle is installed on the outlet side of the twisting nozzle to inject a reverse flow of air toward the inlet side of the air twisting nozzle. −
No. 130625).

Problems to be Solved by the Invention When the above-mentioned proposed device is mounted on a yarn piecing machine that runs along a spinning machine, it is possible to align the air twisting nozzle and the blowing nozzle at the yarn cutting weight with sufficiently high precision. If this is not done, it may not be possible to pass the yarn back through the air twisting nozzle using the blowing nozzle. In addition, a slit is formed in a part of the blowing nozzle to allow the yarn to come out of the blowing nozzle after passing through the air twisting nozzle. It is easy to leak from the slit and lose air energy.

In view of the above-mentioned points, the present invention enables reliable alignment with the air twisting nozzle even when adopted in a traveling type yarn splicing machine, reduces leakage of air from the slit, and securely uses less air energy. An object of the present invention is to provide a yarn splicing device for a binding and spinning device that can pass yarn back through an air twisting nozzle.

Means for Solving the Problems In the present invention, the above-mentioned object is achieved by providing an air twisting nozzle for producing a bundled spun yarn by injecting an air flow to a fiber bundle; In a yarn splicing device for a bundling and spinning device that includes a blowing nozzle that injects a reverse air flow toward the inlet side of an air twisting nozzle, the blowing nozzle has a guide portion and a It is possible to advance and retreat,
This is achieved by a splicing device of a binding and spinning device that includes a jetting section that can engage with a guide section and surround the yarn path.

Effect In the present invention, the blowing nozzle is divided into a guide part and a jetting part, and when the jetting part is engaged with the guide part, the guide part and the jetting part surround the yarn path, causing a loss of jetted air. The yarn can be passed back through the air twisting nozzle without any problems.

Moreover, by making the engagement surfaces of the guide part and the injection part a combination of a convex surface and a concave surface, the guide part and the injection part are automatically tightly fitted by moving the injection part forward toward the guide part. Therefore, by installing a guide part at a predetermined position of the spinning machine in correspondence with each air twisting nozzle and pressing the injection part against the guide part, the blowing nozzle of the present invention can be automatically air-twisted. Can be aligned with the twisting nozzle.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the drawings, which illustrate preferred embodiments of the invention.

FIG. 2 is a side view of one spindle of a spinning machine equipped with a splicing device for binding and spinning according to the present invention. In FIG. , 2, and front rollers 3, 3. An air twisting nozzle 4 is provided near the front rollers 3, 3 downstream of the front rollers 3, 3.

The front top roller 3 of the draft device is configured to be able to press against and separate from the front bottom roller 3 by a known pressure means.

The yarn Y spun by the air twisting nozzle is supported by the cradle arm 7 from the draw-off rollers 5, 5,
It is sent to a bobbin B rotated by a winding drum 6, and is traversed by a traverse guide to form a package P.

The air twisting nozzle 4 can take a steady operating position shown by a solid line in FIG. 6 and a splicing position shown by a chain line.

The air twisting nozzle shown in FIGS. 1 and 2 consists of a first nozzle 8 and a second nozzle 9,
The number of bundled fibers is increased by the first and second nozzles, and the bundled fibers are tightly wound around the core fibers at a large twist angle.

The first nozzle 8 includes a thread passage 8a;
An annular air storage chamber 8b is formed around the air storage chamber 8b, and an air injection hole 8c is formed which connects the air storage chamber 8b to the yarn passage.

Similarly, the second nozzle 9 includes a yarn passage 9a, an annular air storage chamber 9b formed around the yarn passage 9a, and an air injection hole 9c connected from the air storage chamber 9b to the yarn passage.
is formed.

Note that in the illustrated air twisting nozzle 4, the yarn passages 8a, 9a of the first nozzle 8 and the second nozzle 9 are located in a straight line;
may intersect at an angle.

The blowing nozzle of the present invention consists of a guide section 11 and an injection section 12.

The guide portion 11 is provided integrally with the upper surface of the second nozzle of the air twisting nozzle 4, or is attached to the frame of the spinning machine. The guide part 11 of this embodiment is the third
As shown in the figure, it has a fan shape, and a thread passage wall 11a with an arcuate cross section is formed at the main part of the fan. The yarn passage wall 11a is inclined from the top to the bottom as shown in FIG.

The injection part 12 is mounted on the yarn splicing machine, and is advanced toward the guide part 11 by a moving member (not shown) such as an air cylinder and engages with the guide part (as shown in FIGS. 1 and 3). state), and is designed to retreat from the guide section. In addition, the injection part 12 is configured so that it can swing slightly when engaging with the guide part 11, and is automatically aligned by the engaging surfaces of the guide part 11 and the injection part 12. It is preferable that the assembly accuracy of the injection part 11 and the injection part 12 is not required to be excessively strict. A spinning machine is usually equipped with a large number of spindles, and the present invention has a great advantage in that assembly precision does not have to be excessively strict as described above.

The lower surface of the injection part 12 may be in contact with the second nozzle 9, but may also be left with a slight gap. The tip of the injection part 12 has a concave surface that engages with the fan shape of the guide part.

A substantially cylindrical nozzle body 13 is embedded in the center near the tip of the injection part 12, and a thread passage wall 13a having an arcuate cross section is formed in the nozzle body. The yarn passage wall 13a is inclined from the top to the bottom as shown in FIG.

When the guide section 11 and the injection section 12 are engaged as shown in FIG. 1, the guide section 11 and the thread passage walls 11a and 13a of the nozzle body 13 form a frustoconical thread passage. The diameter of the lower part of the yarn passage is made to be approximately the same as the diameter of the yarn passage 9a of the second nozzle,
As will be described later, it is preferable that the air stream be smoothly injected from the blowing nozzle to the air twisting nozzle 4. However, since the yarn passage wall 11a fixed to the air twisting nozzle 4 must not obstruct the discharge of air from the yarn passage 9a during steady operation, it is preferable that the yarn passage wall 11a not protrude above the yarn passage 9a.

An arc-shaped air storage chamber 12b is formed around the nozzle body, and compressed air holes 12a are formed in the air storage chamber 12b.
Compressed air is supplied from Also,
A downwardly inclined injection hole 13b is formed between the air storage chamber 12b and the yarn passage wall 13a. Here, the injection hole 13b is positioned and inclined so that its extension line (dashed line in FIG. 1) reaches the yarn passage 9a of the first nozzle 9 of the air twisting nozzle 4, so that the air injected from the injection hole 13b is Preferably, the flow enters the air twisting nozzle 4.

During steady operation, the injection part 12 of the blow nozzle is separated from the guide part 11. In this state, the fiber bundle (fleece) F is drafted to a predetermined magnification by a drafting device consisting of cross rollers 1, 1, middle aprons 2, 2, and front rollers 3, 3 to form a ribbon-shaped fiber bundle. is twisted and untwisted by an air twisting nozzle 4 to produce a bundled spun yarn Y, which is then passed through draw-off rollers 5, 5 and a winding drum 6, and supported on a cradle arm 7, as shown in FIG. The package P is wound onto the bobbin B that has been prepared.

When the spun yarn Y is cut during spinning, the cradle arm 7 supporting the package P is pushed up by a push-up mechanism (not shown) to separate the package P from the drum 6. On the other hand, the draft mechanism's cross rollers 1, 1 immediately stop, the other rollers continue to rotate, and the fiber bundle F is transferred to the cross rollers 1, 1.
1 and middle apron 2, cut between 2.

Next, stop the thread splicing machine in front of the thread cutting weight,
Next, the package P is removed by operating a yarn end pick-up mechanism (not shown) while reversing the package drive roller (not shown) mounted on the yarn splicing machine.
The end of the yarn wound in is pulled out and gripped by the piecing rollers 10, 10' (FIG. 1), and the piecing rollers 10, 10' are positioned directly downstream (directly above) the final outlet of the air twisting nozzle 4. .

Further, the injection part 12 of the blowing nozzle of the present invention is advanced so that its tip end surface engages with the tip end surface of the guide part 11, as shown in FIG.

Next, when the blowing nozzle and the air twisting nozzle 4 are moved together with the piecing rollers 10, 10' in the axial direction of the front rollers 3, 3 and removed from the yarn path during steady operation, the blowing nozzle and the air twisting nozzle 4 are moved below the air twisting nozzle 4, i.e. , a space is created on the entrance side. Through this space, a yarn end suction means 14 having a known structure is positioned on the inlet side of the air twisting nozzle 4.

The piecing rollers 10, 10' are rotated in the opposite direction to let out the seed yarn, and an air stream is ejected from the jetting part 12 of the blowing nozzle.
The seed yarn sent from the air twisting nozzle 4 is fed into the air twisting nozzle 4 and sucked by the yarn end suction means 14. As a result, the air flow injected from the injection part 12 flows into the yarn passage of the air twisting nozzle, and the end of the yarn formed on the package P is passed from the final outlet of the air twisting nozzle 4 to the air twisting nozzle 4. It can be smoothly guided towards the entrance.

After leading the yarn end to the inlet of the air twisting nozzle 4,
The yarn end suction means 14 is retreated from the air twisting nozzle 4. Next, the air twisting nozzle 4 integrated with the blowing air nozzle injection part 12 is returned to the normal operating position, and the yarn end suction means 14 is moved to the front top roller 3.
position it below.

In this state, a signal to start the rotation of the cross crawlers is sent, and first the clutches of the cross crawlers 1 and 1 are engaged to start rotating, and the fiber bundle F is moved between the middle aprons 2 and 2.
forward to the action area of the front rollers 3, 3.
reach.

Before the fiber bundle F reaches the front rollers 3, 3, first, the piecing rollers 10, 10' are separated, the package P is rotated in the normal direction, and the yarn end suction tube 1
The yarn end in 4 is advanced through the air twisting nozzle 4.

At the same time or with a slight delay, the lever of the front top roller 3 is operated to lower it, the front top roller 3 is pressed by the front bottom roller 3, and the yarn end is gripped by the front roller,
The yarn is actively sent to the air twisting nozzle 4, and the tension of the yarn end passing through the air twisting nozzle 4 is adjusted to a predetermined tension.

Furthermore, at the same time or with a slight delay, air is injected into the air twisting nozzle 4 to generate a swirling flow, and the yarn end of the seed yarn overlapped with the front rollers 3 is spliced to the fiber bundle.

After threading the yarn through the air twisting nozzle, the injection section is retracted at an appropriate time.

In the above embodiment, the guide part 11 is formed to have a fan-shaped cross section, and the fan-shaped guide part 11 is provided in the injection part 12.
However, conversely, the fourth
As shown in the figure, the injection part 12 may be formed with a convex surface, and the guide part 11 may be formed with a concave surface that engages with the convex surface.

Furthermore, although the air twisting nozzle in the above-described embodiment was of a so-called two-nozzle type, the present invention is also applicable to a one-nozzle as shown in FIG.

Effects of the Invention In the present invention, the blowing nozzle is divided into a guide part and a jetting part, and when the jetting part is engaged with the guide part, the guide part and the jetting part surround the yarn path, and the jetting air is lost. The yarn can be passed back through the air twisting nozzle without any trouble.

Moreover, by making the engagement surfaces of the guide part and the injection part a combination of a convex surface and a concave surface, the guide part and the injection part are automatically tightly fitted by moving the injection part forward toward the guide part. Therefore, by installing a guide part at a predetermined position of the spinning machine in correspondence with each air twisting nozzle and pressing the injection part against the guide part, the blowing nozzle of the present invention can be automatically air-twisted. Can be aligned with the twisting nozzle.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of one embodiment of the present invention, and FIG.
The figure is a side view of one spindle of a spinning machine embodying the present invention.
The figure is a sectional view of FIG. 1, FIG. 4 is a sectional view similar to FIG. 3 of another embodiment, FIG. 5 is a sectional view of yet another embodiment, and FIG. It is a front view explaining the threading procedure of. 4... Air twisting nozzle, 8... First nozzle, 9... Second nozzle, 11... Guide part, 12... Injection part.

Claims (1)

[Claims] 1. An air twisting nozzle that injects an air flow onto a fiber bundle to produce a bound spun yarn, and an air flow that is arranged on the outlet side of the air twisting nozzle and that flows backward toward the inlet side of the air twisting nozzle. In a yarn splicing device for a bundling and spinning device, the blowing nozzle includes a blowing nozzle that injects a blowing air nozzle, the blowing nozzle is movable forward and backward with respect to the guide portion, and engages with the guide portion to surround the yarn path. A yarn splicing device for a binding and spinning device, characterized in that it comprises a jetting section.