JPS5976933A - Method for ending in bundle binding spinning frame - Google Patents

Abstract

PURPOSE:To carry out the ending of bundle bound spun yarn, surely, by overlapping the ends of the yarn retracted from the package while continuing the normal drafting operation without opening the nip of the front roller. CONSTITUTION:In the case of end breakage, the broken end is cleaned by removing the scrap, passed through the take-up rollers 5, 5' and the false-twisting air nozzle 4 by the aid of the suction nozzle, and allowed to stand near the outlet of the front roller. A fiber bundle A is supplied to the back rollers 1, 1' and drafted at the drafting parts 1-3 under normal condition. The bundle discharged from the front roller 3, 3' is sucked into the pneumatic clearer 13 and at the sametime, the broken end is introduced laterally into the nip part of the front rollers 1, 1'. When the introduced bundle is overlapped with the above broken end, the yarn and the fiber bundle are cut at the openings of the suction nozzle 10 and the pneumatic clearer 13, and the operation of the nozzle 4 and the winding part are started.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn splicing method in a binding spinning device. More specifically, using an air false twisting nozzle, while maintaining the continuity of the fiber bundle, false twist is applied to it, and the fibers having free ends on the surface are wound around the core fiber bundle to form a binding thread. In binding spinning MVc, the present invention relates to a so-called splicing method of splicing yarn in which a broken yarn end is intertwined with a fiber bundle tip i4, that is, a fleece, and gold.

Since yarn is spun at a high speed of 100 m/min or more in bundle spinning, if a yarn breakage occurs, it is impossible to fold the broken yarn end into the spun fleece as in the case of a Su/Gui W spinning machine. This is extremely difficult, and even if the paternal lines are connected, there will be some slack at the seam, making it difficult to wind it neatly into a package.

Therefore, the common thread splicing method currently in practical use is a knot method in which 7 leases are heated to form a thread, and then tied together with the end of the broken thread using a knock. This is undesirable because it may cause quality defects to the product during the knitting and weaving process.

The splicing method is, for example, as disclosed in U.S. Pat. No. 53-35033, in which the broken yarn ends on the package side are fed back through an air false twisting nozzle, and then passed through the upper and lower front rollers of a drafting device. There is a method of gripping it in between and overlapping it with the tip of the 7 lease on the supply side. However, this method only works if the tip of the fiber bundle has already reached the front roller when the thread breaks.

For example, when fibers are wrapped around a roller or the like in a draft area and removed by appropriate means, which often occurs in practice, the tip of the fiber bundle is separated between, for example, the back roller and the middle roller. If the yarn end is in the middle, the front roller will grip the yarn end and restart operation at normal speed, since the rotation speed of the front roller will be much higher (approximately 20 times) than that of the middle roller. Before the tip of the fiber bundle reaches the front roller, the prepared package side yarn end passes through the front roller and cannot be overlapped. Avoid this drawback/hime70 controlleratehatsu)y
- It is not impossible to grasp the yarn end on the side side or restart the operation of the front rollers a little later than that of the middle rollers, but in this case, due to transient phenomena at the beginning of operation, the middle rollers and the front rollers may In the beginning, normal drafting is not carried out between the yarns, and a fiber bundle that is thicker than specified is spun out, and this overlaps with the yarn end, resulting in an irregular system with a thick joint.

The present invention has been made in view of the drawbacks of the prior art, and it is possible to connect the yarn without opening the gripping point of the 70 roller when piecing the yarn.
The aim is to perform yarn splicing that creates a good seam by overlapping the fiber bundle tip and the package side yarn end while maintaining conditions for normal drafting without changing the timing of the zero-knot roller operation. be.

That is, in the present invention, an air false twisting nozzle is arranged facing the front roller provided on the most downstream side of the drafting device, so that #jI! is spun from the front row 2. In a binding spinning device that applies a string bundle vortex to a fiber bundle to form a binding yarn, when splicing the yarn, an end portion of the yarn unwound from the package is inserted into the air false twisting nozzle and guided to the front drawer, On the other hand, the strand bundle is properly drafted by the front ml draft device and continuously discharged from the front roller.
The package side yarn end portion is inserted between the top roller and the bottom roller from the top roller free end side of the front roller, and is overlapped with the fiber bundle being spun at the gripping point of the front roller. It is an object of the present invention to provide a yarn arranging method for a binding and spinning device, characterized in that generation of air vortices is restarted in the air spool nozzle until the end portion finishes passing through the gripping point. .

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

FIG. 1 shows a unit of a binding spinning device to which the present invention is applied, which includes back rollers i, t', middle rollers 2,
2' (and aprons 2a and 2'a wrapped around it)
An air false twisting nozzle 4 having a fiber bundle passage 4a is provided on the downstream side of a draft roller group consisting of front rollers 3 and 31, and a pull-out roller 5.5' and a winding drum 6 are further arranged.

The sliver A supplied from the left in the figure is drafted to a predetermined magnification by each draft roller group, and then introduced into the fiber bundle 1 width 4a of the air false twisting nozzle 4, and is introduced into the passage 4a.
Under the effect of a vortex flow caused by high-pressure air injected from the injection hole 4b, it is heated and becomes a binding thread on the pull-out rollers 5, 5.
After being drawn out by ', the package P is wound onto a bobbin that rotates in contact with the drum 6.

If thread breakage occurs, at least backrow 21.1
° stops immediately and interrupts the supply to the fiber bundle. Then, if necessary, fibers remaining in the drafting device, such as fibers wrapped around the rollers, are cleaned, and the drafting device is maintained in a state where normal drafting operation is possible.

On the other hand, the thread end on the package side is package P? drum 6
The unwinding row 27 separates from and reverses the winding row 27, and the yarn guiding nozzle 120 cooperates with the yarn guiding nozzle 120 to suction the surface of the package. It is conveyed to the outlet of the false twisting nozzle 4. If necessary, the air false twisting nozzle 4 is displaced from its normal position to facilitate the threading operation described below.

For example, in FIG. 2, the air false twisting nozzle 4 is.

In combination with the long hole 87 provided in the body and the bin 9 provided in the support bracket (not shown), the spinner is tilted forward from the spinning position, and the inlet is separated from the front rollers 3, 3' for sufficient operation. It has been removed to free up space.

Next, the suction nozzle 10 approaches the inlet of the air false twisting nozzle 4, and by fully applying suction to the fiber bundle passage, the yarn guide nozzle 12 at the outlet (thereby suctioning the held yarn end, The yarn is fed back into the fiber bundle path through the fiber bundle passage. The chestnut thread after the reverse feeding process is passed through the thread guiding nozzle 1.
The slit (slit) provided along the yarn path of No. 2) is removed. The suction nozzle 10 moves while sucking the yarn end, and waits at a position diagonally rearward of the free end side of the top roller 3 of the front rollers 3, 31, where it is not gripped by the two rollers 3t31, as shown in FIG. During this time, the air false twisting nozzle 4 returns to its normal position.

At this time, the predetermined length is controlled by the number of revolutions of the unwinding roller 7 or the thread (not shown) provided in the middle of the suction vibrator 11 connected to the suction nozzle 10. Secured.

All rollers of the drafting device then resume rotation.

The fiber bundle drafted to a predetermined magnification is transferred to the front roller 3
, 3' are suctioned and discharged from the gripping points to the pneumatic clearer 13 provided immediately in front of the gripping points.

As the suction nozzle 10 moves in the direction of the arrow, the package-side yarn end, which had been waiting in the full direction of the -470 controllers 3 and 31, is held between the front rollers 3 and 3' and moved forward, and at the same time, the package P is moved forward. It is released from the rewinding roller 7, contacts the winding drum 6, and starts winding.
Further, the drawer row 25 also returns to its normal position.

The length of the yarn end portion is adjusted so that as the suction nozzle 10 moves, it is gradually guided by the center VC of the front roller and escapes from the suction nozzle 10 when it overlaps with the fiber bundle passing through 5, and the length is adjusted in accordance with the timing. When the air vortex is resumed in the air false twisting nozzle 4, the fiber bundle that had been suctioned and discharged to the pneumatic clearer 13 is sucked into the air false twisting nozzle 4 and heated together with the yarn. .

This twist is propagated from the front rollers 3 and 31 to the fiber bundle and the yarn end, which are spun by weight, and the two are interlaced and joined.

5 to 7 show two types of air false twisting nozzles suitable for carrying out the yarn splicing method of the present invention. A slit 20 along the fiber bundle path is cut in the back of these nozzles, and the slit 20 is cut along the fiber bundle path 4a during the splicing operation.
is exposed to the outside along its entire length.

That is, the air false twisting nozzle 4 shown in FIG. 5 is provided with a removable cover 21 along the slit 20, which is removed when splicing the yarn.

In the example shown in Fig. 6.7, the fiber bundle passage 4ai is made rotatable with respect to the nozzle body 4C, and during yarn splicing, the nozzle body 4C is provided with a slit 20a and a slit provided in the fiber bundle passage 4a. ) 20b to open the fiber bundle passage 4a to the outside.

(Figure 6) Figure 7 shows the state during normal spinning.

In the yarn splicing method using the improved air false twist nozzle, as shown in FIG. The thread can be further passed through the slit of the air false twisting nozzle 4 to convey the end portion of the thread to one surface of the front rollers 3, 3I (Z position). Therefore, in this case, the yarn guiding nozzle 12 in the example described in AL is not required, and of course, there is no need for receiving or passing the yarn ends at the outlet or inlet of the air false twisting nozzle. Furthermore, although it depends on the shape of the air false twist nozzle used, displacement of the nozzle 4 for threading is in principle unnecessary.

According to the yarn splicing method of the present invention, the yarn end portion is inserted from the side of the front roller toward the gripping point into the fiber bundle being drafted at a regular draft magnification and being discharged, so that the two are always overlapped. The length of the yarn end portion to be prepared can also be controlled.

The time it takes for the part to pass through the front roller can be predicted, and based on this, the total air vortex flow f in the air false twisting nozzle is:
By causing this to occur, it is possible to perform a yarn splicing having a seam portion having a suitable overlapping length and having an even thickness.

Moreover, automation of the process is also possible, and in particular, by using an air false twisting nozzle provided with a slit, it is possible to greatly simplify the apparatus.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of an example of a binding and spinning device a to which the method of the present invention is applied, Fig. 2 is a side view showing the splicing operation of the present invention, and Fig. 3 is a package side yarn end portion in the splicing operation. FIG. 4 is a side view showing another yarn splicing operation of the present invention, and FIGS. 5 to 7 are views of an air false twist nozzle suitable for performing the yarn splicing operation shown in FIG. 4. FIG. 3 is a cross-sectional view showing the structure. 1.11...back roller, 2.2'...middle roller. 2a+2'a...middle apron, 3.3'-゛°front roller. 4... Air false twist nozzle, 5.5'... Pull-out roller. 6... Winding drum, 4a... Fiber bundle passage. 4))...Injection hole +4c...Nozzle body, 7...
Rewinding roller, 12... Thread guiding nozzle, 8... Long hole, 9... Pin, 10... Suction nozzle, 11...
・Suction pipe, 13...Pneumatic Kuryara, 2
0...Slit. 21...Cover, 20a, 20b...Slit,
P...Package. Patent Applicant Toyota Industries Corporation Patent Attorney Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Akiyuki Yamaguchi (Figure 1) 181 Figure 4゛ 1 Figure 5 'i' = 61 pu)

Claims (1)

[Claims] 1 Binding spinning in which an air false twisting nozzle is arranged facing the front roller provided on the most downstream side of the drafting device, and an air vortex is applied to the fiber bundle spun from the front roller to form a binding yarn. In the device, when splicing the yarn, the end portion of the yarn unwound from the package is inserted into the air false twisting nozzle and guided to the front roller, while the strand bundle is properly drafted by the drafting device and continuous from the front roller. The yarn end portion on the package side is inserted between the top roller and the bottom roller from the free end side of the top roller of the front roller, and the fibers being spun are overlap with the bundle, and then restart the generation of air vortices in the air false twisting nozzle until the end of the yarn has passed through the gripping point. .