JPH0545698B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double twister yarn splicing method and apparatus.

[Prior Art] Among spinning machines, a double twister (double twister) is known as a device used in a yarn twisting process.

As shown in FIG. 8, a conventional double twister of this type has a spindle 1 that rotates at high speed and a tensioner 2 that applies an appropriate tension to the yarn Y. It is designed to support the top.

Then, the yarn Y of the yarn supply package 3 is introduced into the spindle 1 via the tensor 2 and the shaft hole 4, guided radially outward, and further folded upward to be twisted, and the twisted yarn is transferred to the Snell wire. 5, thread guide roller 6, feed roller 7
The paper is then wound onto a paper tube 9 (take-up package 10) which is rotated in contact with a rotating drum 8.

[Problems to be Solved by the Invention] In the conventional double twister, when yarn breakage occurs, the operator passes the yarn end on the yarn feeding side through the spindle 1, and then passes the bobbin yarn to the yarn end on the winding package 10 side. (needle thread).

However, in recent years, automatic splicing has been desired in order to save manpower, reduce work effort, or improve efficiency.

As a countermeasure to this problem, it is conceivable to provide a known splicer (yarn splicing device) provided in an automatic winder in the middle of the yarn path and supply the broken yarn end to this splicer.

However, in this case, if the splicer 1 fails to splice the yarn, the end of the yarn will wrap around the bottom of the spindle 1, and even if you try threading again, the success rate will be very low, and it will take a lot of time to re-splice the yarn. Not only will it hang, but it will also be more likely to generate thread waste.

In view of the above-mentioned circumstances, the present invention was devised to provide a double twister yarn splicing method and apparatus that can promptly deal with failures in yarn splicing.

[Means and effects for solving the problem] The present invention provides a method for holding the thread end after threading the bobbin thread through the spindle when thread breakage occurs in the process of winding up the twisted thread led out from the spindle side. While doing so, the thread is spliced with the end of the upper thread, and if the splicing fails, the splicing is performed again using the retained bobbin thread. The present invention also includes a thread splicing mechanism that splices the upper thread and the bobbin thread, and a yarn end of the bobbin thread that has been threaded, which is held and supplied to the thread splicing mechanism, and is held until the thread splicing by the thread splicing mechanism is successful. It is equipped with a thread end holding mechanism that continues to hold the bobbin thread.

With this configuration, when the yarn splicing fails, the yarn splicing mechanism performs the yarn splicing again using the threaded bobbin thread held by the yarn end holding mechanism.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

First, an embodiment of a double twister yarn splicing device according to the present invention will be described with reference to FIG.

This yarn splicing device is mainly composed of a yarn splicing mechanism 11 that splices the upper thread and the bobbin thread, and a yarn end holding mechanism 12 that holds the threaded bobbin thread in order to supply it to the yarn splicing mechanism 11. It is provided at a position where it can engage with the twisted yarn being wound up.

The yarn splicing mechanism 11, like a known splicer,
It has two untwisting nozzles 13 and 14 that untwist the yarn ends by air force, and a twisting nozzle 15 that twists the untwisted yarn ends together, and these are supported by the main body board 16. has been done.

The twisting nozzle 15 is slidably provided in a nozzle window 17 formed in the center of the main body panel 16 and has a rectangular shape when viewed from the front. and the twisting position R.
It is designed to be able to reciprocate between a thread splicing success/failure detection position S which is further protruded.

The untwisting nozzles 13 and 14 are arranged at both ends (up and down) of the twisting nozzle 15, and are fitted and fixed into nozzle holes 18 formed in the main body plate 16.

The main body plate 16 is made of a circular plate with a predetermined thickness, and is 180 mm with respect to the case 19 that houses it.
It is formed so that it can be rotated by a certain degree. That is, this yarn splicing mechanism 11 is configured such that the untwisting nozzles 13 and 14 can be switched upside down with the twisting nozzle 15 as the center.

On the other hand, the yarn end holding mechanism 12 includes a clamp 20 that pinches and holds the yarn end, and a yarn splicing mechanism 11 attached to the clamp 20.
In this embodiment, these are provided near the top and bottom of the yarn splicing mechanism 11, respectively, so that the held yarn end can be supplied to the yarn splicing mechanism 11. It's summery.

The clamp 20 includes a pair of rollers 22 that can be moved toward and away from each other.
The tip end in the axial direction is pointed in a conical shape, so that the thread end can be appropriately introduced from the axial direction. Also, gears 23 that mesh with each other are provided on the base end side.
is installed and rotated,
The pinched yarn can be sent to the untwisting nozzle 13 side.

In addition, the yarn splicing device includes a drive control device for operating the untwisting nozzles 13, 14 and the twisting nozzle 15, rotating the main body plate 16, rotating the roller 22, and operating the cutter 21 at predetermined timings. (not shown) is provided.

Next, an embodiment of the double twister yarn splicing method according to the present invention will be described as the function of the above structure with reference to FIGS. 2 to 6 and 7.

If a yarn breakage occurs during the twisting of the double twister, the yarn end on the yarn feeding side is passed through the spindle (FIG. 7, ST1) and then pulled out upward.

Then, as shown in FIG. 2, the threaded lower thread 24 is held between the lower clamps 20. In addition, the thread end on the winding side (needle thread 25) can also be clamped in the upper clamp 20 in the same way (ST2). Then, the ends of the held threads are cut with the respective cutters 21.

Next, as shown in FIG.
4 is activated, the roller 22 is rotated to let out the cut bobbin threads 24 and 25, and sucked into the nearby untwisting nozzles 13 and 14, respectively (ST3). Therefore, this suction length is determined by the amount of rotation of the roller 22. The tip sides of the sucked-in lower thread 24 and upper thread 25 are each untwisted by air force.

When the untwisting is completed, as shown in FIG. 4, with the clamps 20 holding the lower thread 24 and upper thread 25, turn the main body board 16 180 degrees clockwise in the figure.
Rotate degrees. The untwisting nozzle 14, which has loosened the lower thread 24, is now positioned upward, and the untwisting nozzle 13, which has loosened the upper thread 25, is positioned below, and the untwisted portions of each thread are pulled out and straightened. They overlap at the position of the central nozzle window 17.

Here, as shown in FIG. 5, the twisting nozzle 15, which is in the standby position Q, is advanced to the twisting position R, and the untwisted yarn is twisted to perform yarn splicing (ST4).

Once the thread splicing is complete, as shown in Figure 6,
By further protruding the twisting nozzle 15 to the yarn splicing success/failure detection position S and engaging the yarn held by the clamp 20, the sensor function is used to detect whether or not the yarn splicing is successful. ST5).

If thread splicing fails (ST6), main panel 16
rotates 180 degrees counterclockwise in FIGS. 3 to 5, returns to the original position, and applies the suction force of the untwisting nozzles 13 and 14 to remove the failed portion.
Then, the roller 22 is rotated again to perform the above operations (ST3 to ST5) of letting out the lower thread 24 and the upper thread 25, untwisting, and splicing the threads.

Furthermore, when the thread splicing is successful, the rollers 22 that were in contact with each other separate and release the thread clamp (ST7).
Restart twisting by double twister.

In this way, since the yarn splicing mechanism 11 having the untwisting nozzles 13, 14 and the twisting nozzle 15 and the yarn end holding mechanisms 12 arranged above and below it are provided, it is possible to splice the yarn when a yarn breakage occurs. This can be done automatically, and when thread splicing fails, the thread end holding mechanism 12 holds the bobbin thread 24, so the thread end does not wrap around the lower part of the spindle, and there is no need to perform threading. Therefore, the time for resplicing can be significantly shortened, and no yarn waste is generated. That is, even if a yarn splicing fails, it can be dealt with quickly, contributing to improving the efficiency of the yarn twisting process.

In particular, in this embodiment, after the yarn ends are clamped, they are fed out to the untwisting nozzles 13 and 14,
Furthermore, since the yarn loosened by the rotational movement of the untwisting nozzles 13 and 14 is supplied to the twisting nozzle 15, there is no need to separately provide means for supplying the held yarn end to the yarn splicing mechanism 11. With no,
Since the threads can be fed in a straight line, splicing can be carried out extremely reliably.

Also, in the double twister's yarn twisting operation, the spindle is rotated at high speed and then the twisted yarn is wound up, so in order to check whether the yarn splicing was successful or not, it is necessary to run the yarn once like an automatic winder. It is difficult to detect, and even if it turns out that the yarn splicing has failed, it will still take time to re-splice the yarn. On the other hand, in this embodiment, success or failure is detected by projecting the twisting nozzle 15 while the yarn is clamped, so it can be confirmed very reliably and easily.

In this embodiment, the means for transferring the lower thread 24 and upper thread 25 to the clamp 20 is omitted, but this can be easily handled by providing a suction mouth that captures the threaded lower thread 24. Alternatively, the thread may be clamped by the operator's hand.

Further, the thread end holding mechanism 12 of this embodiment
4 and the upper thread 25, but the lower thread 2
Even if configured to clamp only 4,
This provides the above-mentioned effect of eliminating the need for threading and significantly shortening the time required for re-splicing. However, in this case, a separate means for supplying the upper thread 25 to the thread splicing mechanism is required.

Further, the yarn splicing device of the present invention may be attached to the double twister, for example, between the Snell wire 5 and the yarn guide roller 6 in FIG.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are achieved.

(1) When a yarn splicing fails, the yarn splicing operation is performed again after threading, so there is no need to rethread the yarn when splicing again, improving the efficiency of splicing and twisting. achieved.

(2) Equipped with a thread splicing mechanism that joins the upper thread and bobbin thread, and a thread end holding mechanism that holds the threaded bobbin thread to be supplied to the thread splicing mechanism, so that the bobbin thread does not reach the spindle when thread splicing fails. There is no twisting, and the yarn can be re-spliced quickly.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of a double twister yarn splicing device according to the present invention, and FIG. 2 is a side sectional view showing an embodiment of a double twister yarn splicing method according to the present invention. Figures 3 to 5 are perspective views showing the action of the yarn end holding mechanism, and Figure 6 is a side view showing the action of the yarn splicing mechanism. FIG. 7 is a flowchart showing an embodiment of the double twister yarn splicing method of the present invention, and FIG. 8 is a side sectional view of the double twister for explaining the conventional problems. be. In the figure, 11 is a yarn splicing mechanism, 12 is a yarn end holding mechanism,
24 is a lower thread, and 25 is an upper thread.

Claims (1)

[Scope of Claims] 1. When thread breakage occurs during the process of winding up the twisted thread led out from the spindle side, after threading the bobbin thread through the spindle, while holding the thread end, connect the thread end with the upper thread. A double twister yarn splicing method characterized by splicing the yarn, and when the splicing fails, splicing the yarn again using the retained bobbin thread. 2. A thread splicing mechanism that splices the upper thread and the bobbin thread; and a thread splicing mechanism that holds the thread end of the bobbin thread after threading and supplies it to the thread splicing mechanism, and that continues to hold the thread end of the bobbin thread until the thread splicing by the thread splicing mechanism is successful. A double twister yarn splicing device characterized by comprising a yarn end holding mechanism that continues to hold the yarn end.