JPS6151048B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention patrols around a spinning machine, false twisting machine, etc. (hereinafter referred to as a spinning machine), finds a thread cutting weight, automatically stops at that location, and cuts the thread. This invention relates to an improvement in a yarn splicing method in an automatic yarn splicing machine that splices weights. More specifically, the ends of the two threads to be spliced are held parallel to each other to facilitate knotting, and the threads are held so that the threads are automatically separated from the knotter when tension is applied to the knotted threads. The feature is that the knots are applied to the rows from above.

The work process of an automatic yarn splicing machine can be roughly divided into the upper thread preparation process, which restarts spinning of the thread breakage spindle and threads it through the take-up roller and thread breakage detector, and the needle thread preparation process, which captures the bobbin thread that is the thread breakage in the package cage. , a bobbin thread preparation process in which the bobbin thread is unwound and drawn into the automatic splicing machine while reversing the package cage, a process in which the aligned upper and lower threads are tied with a knotter and spliced, and a splicing process. There is a winding process in which the temporarily retained yarn is temporarily wound into the package cage at high speed.

Among the above-mentioned operation steps, there were many factors that caused yarn tying to fail in the yarn processing immediately before and after tying the yarn with the knotter.

In other words, in the process immediately before tying the thread, when aligning the upper thread (the thread that is continuously fed from the supply device) and the lower thread (the cut end of the thread wound around the package cage), the movement of the guide This guides the thread to a convenient position for knotting, but when the guide moves the thread that is fed out at high speed from the feeding device (mainly consisting of a drive roll and a guide roll), the guide moves. The yarn tends to become slack due to frictional resistance, and it often fails to reliably feed the yarn to the knotter.

In the process immediately after tying the thread, the thread knot tied with the knotter is removed from the knotter and wound onto the package. However, depending on the direction in which the knotter is attached and the direction in which the thread knot is pulled out relative to the knotter, the thread knot that has been tied with the knotter is pulled out of the knotter. The thread did not come off smoothly from the knot, and the thread broke due to poor release of the thread from the knot after tying.

As measures to prevent the above-mentioned drawbacks, the guide for separating the knot from the knotter may be operated in accordance with the thread tying movement of the knotter, or the airflow may be blown in the direction in which the thread is separated after it has been knotted. methods have been proposed. However, these methods of separating the yarn require special equipment and have a low success rate, as the yarn may get caught in the guide or the running condition of the yarn may become unstable due to high-pressure air blown from the air blowing nozzle. There remained a problem.

Another problem is that if there is uneven tension between the upper thread and bobbin thread during the thread tying operation, the thread knot may be uneven due to unevenness of the thread knot, or the thread may be pulled out or the thread may break on the bobbin thread side, resulting in poor thread tying. There were many.

In this way, the subtle movements around the knot, from pulling the upper and lower threads together to pulling out the knot immediately before the thread tying operation, affect the knot tying rate. Improvements were needed in the operating method and in the method for drawing out the yarn after forming a knot and completing the splicing.

The present invention has been obtained in order to eliminate the drawbacks of the prior art, and it combines the needle thread sent out through a feeding device from the spinning, high-bulk processing process or the spinning process, and the thread wound around the package. The bobbin thread, which is the end thread that has been unwound, is pulled together and a knot is applied from above these two threads to perform a splicing operation. The feature is that it is configured to automatically leave.

Next, embodiments of the present invention will be described with reference to the drawings.

The automatic yarn splicing machine 1 patrols the front of the spinning machine 2, and when it detects the lighting of a yarn breakage indicator lamp 3 indicating a yarn breakage weight, it decelerates and stops in front of the yarn breakage weight, and at the same time starts a yarn splicing operation.

First, the upper thread suction nozzle 4 installed on the automatic thread splicing machine 1
is rotated to the position 4a toward the spinning nozzle 5 of the thread cutting spindle in a contracted state.

The switch operating arm 6 was pulled into the machine body in parallel with the rotation of the needle thread suction nozzle 4.
is fed out and the spinning switch 7 provided in the spinning machine 2 is pushed at the position 6a, and a solenoid valve (not shown) is actuated by this signal, and the spinning nozzle 5 is activated.
Spinning is restarted by supplying compressed air to the machine.

When spinning is restarted, since the spinning nozzle 5 has a false twisting function, a spun yarn is obtained in which surface fibers are wound regularly or irregularly around a substantially untwisted fiber bundle (upper thread 11 is obtained). At the outlet of the spinning nozzle 5, the yarn 11 spun at this time is
The upper thread suction nozzle 4 is suctioned and held by the suction port of the upper thread suction nozzle 4 facing this, and then the upper thread suction nozzle 4 rotates to the front of the knitter roller 9, and is further swung in the axial direction of this knitter roller 9 to Guide the yarn so that the yarn (thread) is positioned between the take-up roller 8 and the nip roller 9, then extend the suction nozzle 4, and then swing back the suction nozzle 4 in this state to move the yarn 11 between the take-up roller 8 and the nip roller 9. The thread is threaded through the thread breakage detector 10.

Next, the automatic thread splicing machine 1 is moved while the needle thread suction nozzle 4 remains extended and the needle thread 11 is sucked.
pull it into the. 4b shows a state in which the upper thread suction nozzle 4 has completed this operation.

During the splicing operation, the thread is temporarily stagnant at the knotter position, but the needle thread 11 is still fed during this time, so it is necessary to temporarily store it.

The reservoir 12 serves this purpose and is connected to a vacuum source (not shown) and operates to draw the needle thread 11 into it.

When this reservoir 12 rotates obliquely forward while approaching the center of the thread path in place of the backward movement of the upper thread suction nozzle 4, the upper thread 11 is guided to the suction port of the reservoir 12 (at a position away from the thread path). The needle thread is moved forward, then laterally moved to the thread path side, and inserted into the guide portion of the guide plate in front of the suction port, thereby allowing the needle thread to pass in front of the suction port.

On the other hand, the lower thread suction nozzle 13 is also the upper thread suction nozzle 4.
The operation is started at the same time as the spinning restart operation, and the operation for taking out the bobbin thread, which is the yarn cut end, from the package 14 is performed.

First, the cradle gripper 15 rotates toward the cradle arm 16 of the yarn cutting weight to the position 15a, and the cradle arm 16 in the winding state is rotated.
Grasp the tip of the package 14 and lower it a certain distance from the gripped position to the position 15b.
Push down to position a to separate RT drum 17 and package 14. Then, the package 14
The surfaces that were in contact with the RT drum 17 remain at a constant distance regardless of the size of the package 14.

Next, the drive roller 18 is brought into rotational contact with the package 14 separated from the RT drum 17, and the drive roller 18 drives the package 14 in the reverse direction.

The lower end of the lower thread suction nozzle 13 is pivotably supported, and a vacuum is applied to suck the lower thread from a suction port provided at the tip of the lower thread suction nozzle, and suction is applied to the surface of the package 14. It has a structure that moves laterally along the package, or it has a slit-shaped suction port that is equal to the width of the package.

When the bobbin thread suction nozzle 13 is rotated at a certain angle toward the package 14 at the same time as the package 14 is driven in reverse, the suction port of the bobbin thread suction nozzle 13 forms a substantially constant gap from the upper surface of the package 14. While holding the thread, the bobbin thread 20, which is a thread break, on the surface of the package 14 is searched for and captured by suction.

When the bobbin thread suction nozzle 13 suctions and captures the bobbin thread 20, which is a broken thread on the surface of the package cage 14,
A detector 19 provided on the bobbin thread suction nozzle 13 detects capture of the bobbin thread, and in response to this signal, the bobbin thread suction nozzle 13 retreats into the automatic thread splicing machine 1 and draws in the bobbin thread 20.

When the upper thread 11 and the lower thread 20 have been drawn into the automatic thread splicing machine 1 as described above, the lower thread scoop 21 shown in FIG. While unwinding the bobbin thread 20 from the package 14, scoop it up so that the thread path runs parallel to the running position of the needle thread 11 while maintaining a constant distance (20a in Fig. 3 is the bobbin thread suction nozzle 13). (indicates thread path during suction).

In this case, as shown in FIG. 3, the upper thread 11 and the lower thread 2
The thread spacing of 0 is regulated by the chevron-shaped guide portion 23 that matches the opening of the knotter 22, but since the upper thread 11 runs at the end point of the locus of rotation of the bobbin thread scoop 21, the thread spacing between the bobbin thread scoops 21 is designed to provide almost no contact resistance to the upper thread.

Next, the knotter 22 descends downward to the position where the upper thread 11 and the lower thread 20 are aligned, and at the end point of the descent, the thread knotting part (not shown) of the knotter 22 rotates, and the threads 11, 20 of the two threads are tied together. The thread is tied.

After the thread tying operation, the knotter 22 and the bobbin thread scooper 21 immediately return to their original positions, and the drive roller 18
The state of low reverse rotation is switched to high speed normal rotation, and the spliced yarn is wound onto the package 14. When the upper and lower threads are tied together, the upper thread 11 and the lower thread 20, which have been pulled together, continue to run even after being introduced into the knotter 22 until just before the knotter 22 descends and the thread knotting part rotates. This is necessary to equalize the thread tension in the threads and increase the success rate of thread tying.

On the other hand, the thread knotting part of the knotter 22 rotates to complete the thread knotting, and then the knotter returns to its original position and connects the package 1.
It takes an extremely short time until the thread 4 shifts to high-speed forward rotation, but the needle thread 11 sent out from the thread supply device during this time has a length ranging from 1 to several meters.
Take-up roller 8 and knotter 2 that constitute the yarn supply device
2, the yarn becomes slack.

If the needle thread 11 becomes slack, it will cause trouble in tying the thread. Therefore, as shown in FIG. 2, the upper thread 11 is sucked by the reservoir 12 and the slack of the upper thread 11 is absorbed into the reservoir 12, while the package 14 is wound at a higher speed than the normal winding speed. be.

When the winding of the package 14 begins, the thread-tied knot is pulled out in a downward direction so as to be removed from the knot 22. Therefore, the knot is knot 2
2, it is more smoothly detached and wound up into the package 14.

On the other hand, the reservoir 12 is provided with a thread detector 24, as shown in FIG. Then, the yarn detector 24 generates a signal of this condition.

The contact between the drive roller 18 and the package 14 is broken by the signal, and by contacting the RT drum 17, the package 14 shifts from the high-speed winding state to the normal winding state and completes the yarn splicing. be.

Yarn splicing is performed through the series of operations described above, and when this operation is completed, the automatic yarn splicing machine 1
automatically starts and goes around the spinning machine 2 along the rail to perform the yarn splicing operation at the next yarn cutting weight.

In the present invention, (A) the bobbin thread 20 is
While unwinding at a low speed, the lower thread 20, which is running at a low speed, is guided so as to be attached to the upper thread 11, and these two threads do not come into contact with each other until immediately before the tying operation, so that the lower thread 20, which is running at a low speed, is connected to the upper thread 11, which is running at a high speed. The needle thread 11 is guided so as not to be dragged, thereby eliminating the cause of thread slack due to frictional resistance of the needle thread 11.

(B) A knot 22 is inserted from above the upper thread 11 and the lower thread 20, which are aligned so as not to contact each other as described above.
The thread tying part is brought close to the upper thread and the lower thread to act on it, and is moved upward after the thread tying is completed.

With the above configuration, according to the present invention (A), the difference in tension between the upper and lower yarns when tying the yarn with the knotter 22 is reduced, and failures such as poor yarn tying and yarn breakage can be prevented.

Also, it is important to quickly remove the yarn knot formed by the knotter 22 from the knotter 22 for a successful yarn splicing, but since the knotter 22 is operated as described in (B),
4, the thread knot formed in the knot 22 is pulled out naturally, and the knot 22 is smoothly wound.
depart from. Furthermore, by attaching the knot 22 facing downward, there is no accumulation of flies and thread waste in the thread tying section, and the thread tying success rate is dramatically improved.

As described above, according to the present invention, it is possible to prevent the occurrence of troubles in the automatic yarn splicing machine, so that the automatic operation of the spinning machine can be carried out smoothly.

The present invention can be effectively implemented in an automatic splicing device of a spinning machine such as a pneumatic spinning machine, but it can also be implemented in a false twisting machine for processing multifilament or other high-bulk textured yarns. can.

[Brief explanation of the drawing]

Figure 1 is a side view showing the automatic yarn splicing machine according to the present invention facing a spinning machine, Figure 2 is an explanatory diagram of the operating state of the reservoir, and Figure 3 is the operation of the bobbin thread scooping guide. It is a front view showing a state. 1... automatic yarn splicing machine, 2... spinning machine, 3... thread breakage indicator lamp, 4... upper thread suction nozzle, 5... spinning nozzle, 6... switch operating arm, 7... manual spinning switch, 8... Take-up roller, 9... Knit roller, 10... Thread breakage detector, 11... Upper thread, 12... Reservoir, 13... Lower thread suction nozzle, 14... Package cage, 15... Cradle gripper , 16...cradle arm, 17...
RT drum, 18... drive roller, 19... bobbin thread detector, 20... bobbin thread, 21... bobbin thread scoop, 2
2...Notch, 23...Chevron guide, 24...Thread detector.

Claims (1)

[Claims] 1. In an automatic splicing machine of a spinning machine, the spun needle thread is held in a spun state, and the bobbin thread pulled out from the package is unwound at low speed and aligned parallel to the needle thread by a bobbin thread scooping guide. At the same time or after this, the knot was moved downward from above the aligned threads toward the aligned threads, and after introducing both the upper and lower threads into the knot, the knot was activated to tie both threads together. An automatic yarn splicing method for a spinning machine, characterized in that the yarn knot remaining in the knot is actively removed from the knot by restarting winding onto the package cage.