JPS59192729A - Ending in bind spinning machinery - Google Patents

Abstract

PURPOSE:To enable secure ending and restarting of spinning, by inserting yarn end at the side of a wounding material into a spinning machinery by a pair of piecing rollers and helping the restarting of spinning when end breakge occurs in a bind spinning machinery. CONSTITUTION:When end breakage occurs in a bind spinning machinery wherein the air false twist nozzle 4 is arranged at the downstream just below a drafting part, the yarn end drawn out from the winding material P is kept by a pair of the piecing rollers 22, transported to the outlet D of the nozzle 4, inserted into the yarn path 4b in the nozzle 4 by backlashing of the rollers 22, and introduced into the space between the front rollers 3 of the drafting part. In the operation, the suction pipe 21 for yarn end is preferably used. The back rollers 1 and 1' and the middle rollers 3 and 3' of the drafting part, the fleece F is introduced into the space between the front rollers 3 and 3', and both the front rollers 3 and 3' are closed to restart spinning. At a correct time just after the restarting, the piecing rollers 22 and the front rollers 3 and 3' are rotated normally at the same peripheral speed, to help restarting of spinning.

Description

[Detailed description of the invention] Technical field The present invention relates to a yarn splicing method for a binding spinning device.

More specifically, using an air false twisting nozzle, while maintaining the continuity of the fiber bundle, false twisting is applied to it by a swirling air flow f.
In binding spinning, in which fibers with free ends on the surface are wound around a core fiber bundle to form a binding yarn, and this is wound as a package, the package side yarn end and the east end of the fiber, i.e., the unlease, are intertwined when the yarn breaks. This invention relates to a method for joining threads.

In the prior art binding spinning device, an air false twisting nozzle is provided on the downstream side of and close to the front roller located at the forefront of a draft mechanism consisting of a plurality of pairs of draft rollers. Twisted ribbon-like fiber bundles are introduced into a nozzle and heated by a swirling flow to form a grooved yarn, which has attracted attention in recent years because a high spinning speed of 100 ml or more can be obtained. However, due to its yarn structure, the yarn ends are firmly restrained by surface fibers, and the spinning speed is high, so it
It is almost impossible to splice the yarn by simply overlapping the yarn end and 7 leases, so the yarn end must first be fed back into the air false twisting nozzle, and then traced back into the draft mechanism to create a yarn splice within the draft area. It is necessary to sufficiently overlap the ends of the 7-wreath, and then, when the overlapped portion is passed through the air false twisting nozzle again, the two must be bonded together by the heating effect of the air vortex.

The length of this N receiving part does not have a big effect on the yarn splicing result. That is, if this length is too long, the centrifugal force acting on the part during heating will increase, ballooning will increase, and the contact resistance with the inner peripheral wall of the air false-twisting nozzle will be large, causing yarn breakage. Also, even if the yarn splicing is successful, the spliced knots will form a dog and reduce the quality of the yarn. On the other hand, if the overlapping portion is too short, the end of the broken yarn will not be sufficiently entangled with the seven leases, and there will be many chances of yarn breakage. Therefore, obtaining an appropriate overlap length is a major requirement for improving the success rate of yarn splicing.

Conventionally, this overlapping length has been regulated by adjusting the timing of restarting the fleece in the draft mechanism and the timing of restarting winding of the yarn.
As mentioned above, it has been extremely difficult to obtain the desired overlapping length due to the high spinning speed and the fact that the winding speed of the yarn at restart changes due to the difference in the inertial force of the packages.

In particular, if there is a delay in the yarn winding speed, the traveling speed of the yarn in the false twisting nozzle will be slow, resulting in excessive heating due to the swirling flow, which will not only prevent the desired yarn from being obtained, but also result in yarn breakage. There is also.

Object and Structure of the Invention The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has been made to solve the problems. In other words, the present invention provides a method for superimposing the draft mechanism as accurately as possible.
In a knot spinning device in which a fiber bundle spun from the front row 2 is heated by an air false twisting nozzle provided close to the front row 2 to form a bound yarn, the cut yarn end is placed in front of the exit of the air false twisting nozzle during yarn splicing. The fiber bundle is gripped by a pair of beesing rollers located at the fiber bundle, and by reversing the rotation, it passes through the air false twisting nozzle and is brought into the drafting mechanism. The piecing roller is introduced into the twisting nozzle 17, and at the same time, the piecing roller is rotated forward at a speed M synchronized with the surface speed of the front o-5 to pull out the yarn end. This is a yarn splicing method in a binding spinning device, which is characterized by generating a swirling air flow to heat and entangle the overlapping portions of yarn ends and fiber bundles.

Example The present invention will be explained in more detail below based on the drawings.

In Fig. 1, an air false twisting nozzle 4 is installed on the downstream side of the front rows 23, 3' of the draft mechanism consisting of back rollers 1, 1', middle aprons 2, 2', and front rollers 3, 3'. furthermore, the pull-out roller 5,
5', a warping drum 8 is provided. The supplied fiber bundle Ffi is drafted at a predetermined magnification between each pair of rollers of the drafting mechanism, becomes a ribbon, and is transferred to the front roller 3,
3', is subsequently introduced into the air preliminary combustion nozzle 4, is heated by the swirling flow injected from the swirling flow injection hole bored in the inner circumferential wall, and is simultaneously wound by the surface fibers. The thread is turned into a so-called binding thread Y, which is gripped by a pull-out roller 5, 5', guided to a traverse drum 8, and formed into a package P on a bobbin BJ: supported on an arm 9.

When yarn breakage occurs during spinning, the arm 9 supporting the pan cage P separates the package P from the drum 8 and supports it by a push-up mechanism (not shown), while the draft mechanism only supports the back rollers 1 and 1'. It is immediately stopped and the other rollers hl continue to rotate, so the fiber bundle F is cut between the back rollers 1, 1' and the middle aprons 2, 2' and is held in the state shown in Figure 2. .

On the other hand, the yarn end wound into the package P is pulled out from the package surface by a package driving row 220 attached to the yarn splicing device and a yarn end pickup mechanism (not shown) as shown in FIG. The upper air false twisting nozzle 4 is transferred to the front surface of the outlet 4b of the upper air false twisting nozzle 4, which is transferred to the movable beasing roller 22. The piecing roller 22 is now separably engaged with a portion of the air false-twisting nozzle 4, and their relative positions are fixed such that the gripped yarn ends are directed toward the outlet 4b of the air false-twisting nozzle 4. At this time, the front dog roller 3 is separated from the bottom roller 3 by appropriate means and is on standby.

As shown in FIG. 4, the beesing roller 22 includes a drive roller 22a connected to a drive motor 23, and a suppression roller 22b rotatably supported by an L-shaped member 25 rotatably supported by a pin 24. The pressure roller 22b is separated from the drive roller 22a by a renoid 26, and both rollers 22a, 2 are separated by a spring 27.
2b is pressed to grip the thread.

The piecing roller 22 that has engaged with the air false twisting nozzle 4 first rotates in reverse and transfers the gripped yarn end to the outlet 4b of the air false twisting nozzle 4.
Insert it inside. At this time, as shown in FIG. 5, the yarn end suction tube 2 is inserted into the inlet 4a from between the front rollers 3 and 3'.
1 enters and faces the opposite direction, sucks the yarn end in cooperation with the reversal of the beathing roller 22, and holds it after passing between the front rows 23 and 3'.

The length of the yarn to be suctioned and held by the suction tube depends on the number of reverse rotations of the beading roller 22. be determined accurately.

In order to overlap the broken yarn end held in the yarn end suction tube 21 by retracing the air in the air false twisting nozzle 4 with the tip of the fiber bundle, first restart the back rollers 1 and 1'. After moving the bundle forward, this is the front roller 3, 3'
The front roller 3.3' is brought into contact with the timing required to reach the action area of the yarn end and grips the yarn end. At the same time, the bearing row 222 is applied to the front roller 3,
When the yarn end suction tube 2 is rotated forward according to the surface speed of
The ends of the strands held at 1 are superimposed on the fiber bundle in the gripping area of the front rollers 3, 3' and are fed together into the air false twisting nozzle 4. If no swirling air flow is generated in the air false-twisting nozzle 4, the two will not be entangled, and the fiber bundle discharged from the outlet 4b of the air false-twisting nozzle 4 will have a size of ), but when a swirling air flow is applied, both are heated, entangled, and spliced. Therefore, if the yarn length held in the yarn end suction tube is 7, and a swirling air flow is generated in the air false twisting nozzle 4 at that timing, the yarn end and the fiber bundle will overlap by a predetermined length. −
The yarn splicing drive roller 20 also rotates forward at the regular winding speed to drive and rotate the package P to wind the yarn, but the inertial force of the package I) is large and the superposition thereof is not always constant. However, there is a slight delay before the surface speed of the package P reaches the normal winding speed, but the thread end is pulled out by normal rotation of the crow 22, so that an accurate winding speed can always be obtained. Package P is constant rotation drive low 2
20 is also moved back, and the driving of the package P is transferred to the twisting drum 8, and at the same time, the yarn threader returns to its normal state, resulting in the normal spinning state shown in FIG. Furthermore, when restarting spinning, the yarn is rotated in the normal direction to accumulate a predetermined length in the yarn end suction tube and draw it out, allowing the air to completely pass through the false twisting nozzle, so that the tension in the yarn in the adding area may not be excessively relaxed. Since there is no heat, the swirling air flow can perform appropriate heating, and since the consumption time of the stored yarn length can be accurately predicted, the swirling air flow can be applied to the 1 tatami area between the fiber bundle and the yarn end at an appropriate timing. It becomes possible to make it act. As a result, the 11 tatami length of both yarns at the joint will be constant, and it is expected that the success rate of yarn splicing and the hemostasis of the resulting overlapping of yarns will be achieved.

[Brief explanation of the drawing]

Figure 1 is a side view of the binding spinning device showing the spinning state;
Figure 3 is a side view of the binding spinning device showing the yarn breakage state; Figure 3 is a side view of the binding spinning device showing the displacement of the yarn end by the piecing roller; Figure 4 is a front view showing the structure of the sewing row 2; The figure is a side view showing the position of the yarn end suction tube. 3.3'... Front roller, 4... Air false twisting nozzle, 21... Yarn end suction tube, 22...
... Beething roller. %Applicant Toyota Industries Corporation Patent Application Agent Patent Attorney Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Akira Yamaguchi 208-: 4S3 Figure

Claims (1)

[Claims] ■ In a binding spinning device that heats the fiber bundle spun from the 70 controller on the most downstream side of the draft mechanism using an air false twisting nozzle installed close to the front roller to form a binding yarn, yarn breakage occurs when the yarn is strangled. The yarn end is gripped by a pair of beasing rollers located in front of the outlet of the air false twisting nozzle, and by reversing the rotation, the yarn end is passed through the air false twisting nozzle and brought into the draft mechanism, and then overlapped with the fiber bundle. At the same time, the beading roller is rotated forward at a speed synchronized with the surface speed of the front roller to pull out the yarn end, and then spun at a predetermined timing. A method for splicing yarn in a binding spinning device, characterized in that a swirling air flow is generated in an air false twisting nozzle to heat and join the overlapping portion of the yarn end and the fiber bundle.