JPS59199821A - Yarn connection in bind-spinning frame - Google Patents

Abstract

PURPOSE:When the flase tiwsting air nozzle and the piecing rollers are restored to the normal positions, the piecing roller is made to rotate by a certain rotation number to allow the yarn end left in the air nozzle to move into the drafting region. CONSTITUTION:When the false twisting nozzle 4 in which the yarn end is inserted is allowed to come back from the threading position to the normal spinning position, the yarn between the inlet of the nozzle 4 and the yarn end holding tube 28 comes into contact with the side end surface of the front top roller 3'. At this point of time, the piecing roller 22 is allowed to rotate forward by a few revolutions to give the inserted yarn end tension so that the yarn is put along the periphery of the side end surface of the roller 3' in the low side of the roller 3' and inserted into the space between the bottom roller 3 and the top roller 3'.

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 swirling air flow.
A fiber core having a free end on the surface is wound around a fiber bundle to form a binding yarn.In binding spinning, in which this is wound as a package, when the yarn breaks, the package side yarn end and the fiber bundle tip, that is, the fleece, are intertwined. This invention relates to a splicing method for joining.

In a prior art binding spinning device, an air false twist nozzle is provided on the downstream side of and close to a front roller located at the forefront of a draft mechanism consisting of a plurality of pairs of draft rollers, and the air false twist nozzle is installed from the front roller. A non-twisted ribbon-like fiber bundle (fleece) is introduced into a nozzle, heated there by a swirling flow, and made into yarn as it is, which has attracted attention in recent years because it can achieve high spinning speeds of 100 m/min or more. However, due to the yarn structure, the yarn ends are firmly restrained by the surface fibers, and the spinning speed is high, so it is not possible to join the yarn by simply overlapping the yarn ends and 7 wreaths as in a conventional ring spinning machine. (It is almost impossible to do this.) Be sure to insert the yarn end into the air false twist nozzle once, and then trace the yarn end back into the draft mechanism so that it overlaps sufficiently with the lease end within the draft area. is needed.

Conventionally, regarding the insertion of the yarn ends into the air false-twisting nozzle, for example, Japanese Patent Laid-Open No. 53-35033 discloses that an oblique injection hole is provided in the inner circumferential wall of the air false-twisting nozzle to generate an air flow that sends the yarn ends back. A method is disclosed in which the yarn ends are all drilled, and all the air is injected from the injection hole with the yarn ends looking into the nozzle outlet, the yarn ends are sucked into the nozzles, guided to the entrance side, and then gripped by a front roller. has been done. However, as a practical matter, the suction force generated by the small-diameter reverse injection hole drilled in the inner wall of the small-diameter nozzle is extremely small, and a small amount of thread fuzz, etc. caught can create a large resistance, causing thread insertion to fail. There are many things. Therefore, in order to insert the yarn end by suction, it is necessary to insert a suction tube connected to a strong suction source into the inlet of the air false twisting nozzle all at once.

The inventors have used an air false twist nozzle as a means to do this with front rollers. Regular spinning position of i1 side and 70
It is movable between three threading positions that are laterally offset from the controller roller, and when splicing the thread, the front roller is separated from the bottom roller, and the air holder that grips the end of the broken thread is moved. A pair of piecing rollers and an air false twisting nozzle are moved to the threading position in front of the outlet of the twisting nozzle to generate a spatial sound in front of the inlet, and then the cut yarn end of the package side is inserted into the outlet of the nozzle. At the same time, the end of the yarn of a predetermined length is introduced into the suction and gripping tube at the entrance side, and the yarn is inserted into the air false twisting nozzle, and then the air false twisting nozzle and the piecing roller are returned to the normal spinning position. Accordingly, we proposed a method to move the thread end inserted into the draft area.

In this method, when the air false-twisting nozzle returns, the inserted yarn end may come into contact with the draft mechanism, especially the side of the front top roller in the open state, and the transfer into the draft area may not be carried out smoothly. There was fear. If the front top roller is separated from the bottom roller by a large distance in order to solve this problem, disadvantages such as the operation mechanism thereof occupying a large space and the difficulty in setting the thread splicing timing arise.

Object and Structure of the Invention The present invention provides a complete method for reliably transferring the broken yarn end inserted through the air false-twisting nozzle into the draft area in yarn splicing using the air false-twisting nozzle according to the above-mentioned novel proposal. It is something to do.

That is, in the present invention, when returning the air false twist nozzle and the beading roller to the normal spinning position, the beading roller is rotated in the normal direction a certain number of times to apply tension to the thread end held by the suction tube. This is a yarn splicing method for a binding spinning device, which is characterized by inserting the yarn end between separated front rollers.

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 close to and downstream of the 70 controllers 3, 3' of a drafting device consisting of back rollers 1, 1', middle aprons 2, 2', and front rollers 3, 3'. Pull-out rollers 5, 5' and a traversing citram 8 are provided at the length of ``i''L.The supplied fiber bundle F receives a predetermined draft i between each pair of rollers of the draft mechanism and is shaped into a ribbon. and front roller 3
, 3' and introduced into the air false twisting nozzle 4;
The traversing domme 8 is heated by the swirling flow emitted from the injection hole inside the domme, and at the same time is wound by the surface fibers to form a so-called binding yarn Y, which is gripped by the pull-out rollers 5 and 5'.
A package P is formed on a bobbin B which is guided by a bobbin B and supported by an arm 9.

In the binding spinning apparatus to which the present invention is applied, the air false twisting nozzle 4 is constructed so as to be able to take two positions relative to the front rollers 3, 3', as shown in FIG. That is, the air false twisting nozzle 4 is placed at the nip point of the front roller 3.3'.
The normal spinning position A where the inlets 4a of the front rollers are close to each other and facing each other, and the threading position outside the area of the front rollers 3, 3' which has changed parallel to the axial direction of the front rollers 3, 3' from the AQ position. B
It is. A yarn end suction tube 21 is installed in the air false-twisting nozzle 4a on the upstream side along the axial direction of the air false-twisting nozzle 4 at the B position so as to be releasable.

Next, the yarn splicing operation of the binding and spinning device will be explained.

As shown in FIG. 3A, when yarn breakage occurs during spinning, the arm 9 supporting the package Pi is separated from the package PF drum 8 by a push-up mechanism (not shown) and supported, while the draft mechanism only supports the back rollers 1 and 1'. is immediately stopped and the other rollers continue to rotate, so the fiber bundle F is connected to the back rollers 1, 1', middle apron 2,
2' and held in the state shown in FIG. 3A.

The yarn end caught in the package P is pulled out from the package surface by the reverse rotation of the package drive roller 20 of the yarn piecing device and the yarn end pickup mechanism (not shown), and is pulled out from the package surface by the third
As shown in Figure B, the yarn is delivered to and held by a displaceable beading roller 22 attached to the yarn splicing device. The beathing roller 22 receives the package side yarn end at the outlet 4 of the air false twisting nozzle 4 at the passing position C and the normal spinning position AK.
(b) is movable between the yarn end supply positions near the front, and is separably engaged with a part of the air false twisting nozzle 4 at this position, and together with the normal spinning position A and the threading position B. It is designed so that it can be moved from time to time.

The piecing roller 22, which has received the yarn end, is displaced to a position in front of the outlet of the air false-twisting nozzle 4 and engaged with it, as shown by the dotted line in FIG. The nozzle 4 is displaced to the threading position B. This displacement of the air false twisting nozzle 4 causes the nozzle 40 inlet 4a to
As shown in FIG. 3C, the front surface is separated from the surfaces of the front rollers 3, 3' and faces the yarn end suction tube 21 through a free space.

Due to the engagement between the beading roller 22 and the air false twisting nozzle 4, the axis of the yarn end gripped by the beading roller 22 is in a position pointing exactly toward the outlet 4b of the air false twisting nozzle. Suitable for introducing yarn ends into the twisting nozzle.

In this state, the yarn end suction tube 21 is advanced from the standby position and brought into contact with the inlet 4a of the air false twisting nozzle as shown in FIG. 22 is reversed and the yarn end is fed into the yarn path from the outlet 4b of the air false twist nozzle. The suction of the yarn end suction tube 21 and the beading roller 22
When a predetermined length of yarn end is inserted into the air false twisting nozzle 4 by active feeding from the beading roller 22, the beading roller 22 stops rotating. At this time, the feeding length is controlled so that an excessive length of yarn is not sucked into the yarn end suction tube 21.

In this state, the yarn end suction tube 21 begins to retreat to the standby position while exposing a portion of the yarn end suctioned between its tip and the air false twist nozzle inlet 4a (FIG. 3E). At this time, l having a suction action that was waiting in the direction perpendicular to the yarn axis
The yarn end gripping tube 28 with a diameter of J.
Uke is taken from 1. As mentioned above, since the length of the yarn being sucked into the yarn end suction tube 21 is controlled so as not to become too long, the suction force against the yarn end by the yarn end suction tube 21 gradually weakens as the suction tube 21 retreats. Even with the yarn end gripping tube 28 having only a relatively weak suction effect, the yarn end can be smoothly transferred and held in a straight line within the tube. The yarn end gripping tube 28 is made to have a smaller diameter than the yarn end suction tube 21 in order to convey the yarn end to a narrow space within the draft mechanism as will be described later.

When the transfer of the yarn end to the yarn end is completed, the yarn length necessary for the yarn splicing operation described later is transferred by the beathing roller 22 to the yarn end gripping tube 28.
further supplied within.

In the draft mechanism, the troughs 0o-23' of the front rollers 3, 3' are connected to two lever mechanisms (not shown).
Although it can freely come into contact with and separate from the tom roller 3, by this point it has been separated from the bottom roller 3 as shown in FIG. 3B by a push-up mechanism attached to the yarn splicing device.

The air false twisting nozzle 4, through which the yarn end has been inserted, returns to the normal spinning position A together with the beading roller 22, but at this time, the yarn end gripping tube 28 is also synchronized with the air false twisting nozzle 4, and the yarn end is passed through the front roller 3. , 3' and moves to a position where it can be gripped by the rollers. This state is shown in Figures 4A to 4C.

Figure 4A shows that the air false twisting nozzle 4 inserted through the yarn end is still B.
When it moves to the left and returns to position A, the yarn between the inlet 4a and the yarn end gripping tube 28 comes into contact with the side end surface of the 70-ton toner roller 3', as shown in FIG. 4B. Inner rollers 3, 3 whose movement was blocked and separated
′ may not be inserted properly into the space between. Therefore, in the present invention, at this point, the beathing roller 22 is rotated in the normal direction a few times to apply tension to the end of the inserted thread. Due to this tension, the yarn enters the lower side of the front top roller 3' along the circumference of the side end surface of the front top roller 3', and is inserted into the space between it and the bottom roller 3 as shown in FIG. 4C.

Next, the pack rollers 1 and 1' restart operation, and the lever of the front top roller 3' is operated at the timing when the fiber bundle tip reaches the front roller 3 via the middle aprons 2 and 2', and the front roller 3.3 is moved. 'The yarn end and the fiber bundle tip are overlapped and gripped between them, and at the same time, the supply of high-pressure air to the air false twisting nozzle 4 is restarted, and the beading roller 22 is rotated in the normal direction in accordance with the regular spinning speed. . As a result, the fiber bundle tip and yarn end are heated and combined within the nozzle, and then pulled out from the nozzle. This beesing roller 22
Since the package P is rotated while being accelerated by the package drive roller 20 prior to normal rotation of the package P, the yarn whose spinning has been restarted is wound around the package P. When the rotation of the package P reaches a specified speed, the package P is brought into contact with the traversing citram 8 from the drive roller, and at the same time, the beading roller 22 releases its grip on the yarn and returns to the normal spinning state. Thereafter, each beading roller 22, package drive roller, yarn end gripping tube 28, etc. return to their original positions in preparation for the next yarn breakage.

Effects of the Invention According to the present invention, the air false-twisting nozzle is configured to be movable between two positions, the regular spinning position and the threading position, and when the air false-twisting nozzle returns to the regular spinning position, the air false-twisting nozzle is also displaced at the same time. The beading roller is slightly rotated in the forward direction to apply appropriate tension to the thread end, which overcomes the interference of the side end surface of the front dog roller and allows the thread end to be inserted between the separated front rollers. It becomes possible. This dramatically improves the splicing efficiency of the binding and spinning device.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the spinning state of the binding and spinning device, Fig. 2 is a plan view showing the transfer position of the air false twisting nozzle, the yarn end suction tube, and the yarn end gripping tube, and Figs. 3A to 3E are 4A to 4C are perspective views showing the procedure for inserting the yarn end into the 70 controller as the air false twisting nozzle returns. 3.3'... Front roller, 4... Air false twist nozzle, 21... Yarn end suction tube, 22... Beasing roller, 28... Yarn end gripping tube. Patent Applicant Toyota Industries Manufacturing Co., Ltd. Patent Application Agent Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Akira Yamaguchi Figure 3A Figure 3B p Figure 3E To-Y Figure 4A Figure 4B 8 Figure 4C

Claims (1)

[Claims] 1. When performing yarn splicing in a binding spinning device in which a fiber bundle spun from a 70 roller on the most downstream side of a draft device is heated by an air false twisting nozzle installed close to the front roller to form a binding yarn, , the front dot roller is separated from all the bottom rollers, and the package side broken yarn end is gripped by a pair of beading rollers, and the beading rollers and the air false twisting nozzle are all displaced from their normal spinning positions. The thread is inserted into the air false twisting nozzle by creating a space in front of the inlet part thereof, and then inserting the cut thread end into the outlet part of the nozzle and simultaneously introducing the thread end into the suction gripping tube on the inlet part side. death,
Next, the air false twist nozzle and the beading roller are returned to the regular spinning position, and at the same time, the piecing roller is rotated in the forward direction a certain number of times to apply tension to the threaded yarn end, so that the yarn end is transferred to the separated spinning roller. Yarn splicing method in a binding spinning device characterized by inserting yarn between