JPS6215338A - Device for removing residual yarn of spindle in doffing - Google Patents

Abstract

PURPOSE:To make yarn, etc., in an easily releasable state by centrifugal force, by setting a radiated protrusion with short brush length between a yarn end cutting tooth part of a spindle base part and a spindle wharve. CONSTITUTION:The spindle base part 2 is equipped with the yarn end cutting tooth part 9 to cut the yarn end 8 during doffing and below the tooth part, the protrusion 10 is radiately set to catch yarn. When the yarn end 8 is hitched by the protrusion 10 and caught, the yarn end is cut simultaneously with change of the doffing bobbin 6, the empty bobbin 3 can be subjected to bunch winding round the empty bobbin 3, the cut yarn end is separated and released by centrifugal force by the following normal spinning rotation and the yarn end is torn from the tip and scattered.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a spindle residual yarn removing device during doffing of a ring spinning machine.

2. Prior Art When doffing is performed on a conventional ring spinning machine, the thread tail connected to the doffed bobbin is cut off by, for example, a thread tail cutting tooth, and the end is wrapped several times around the lower part of the thread tail cutting tooth. By holding the bobbin there, the traveler rotates to automatically wind the next empty bobbin. If you do this, each time you doff, the ends of the thread will accumulate and
Automatic doffing work cannot be performed continuously unless the accumulated bundles of thread tails (residual threads) are removed after every several doffing operations, which hinders automation.

For this reason, various attempts have been made in the past.

For example, in Japanese Utility Model Application No. 55-151756 (Fig. 6), a cloth with a long pile or a protrusion that has a similar effect to this cloth is added to the inside of the bobbin, and is used for doffing. The yarn left unwound on the spindle was removed by pulling it out with a bobbin having the cloth or protrusions on the inside.

Simply doffing using a bobbin with cloth or protrusions added to the inside does not necessarily mean that the end of the thread from the previous doffing will be moored to the desired position on the spindle.
The remaining yarn accumulates near the base of the spindle, and it cannot be said that the cloth or protrusions inside the bobbin will reliably remove the remaining yarn during doffing.

In the case of this device, if a cloth or the like is attached to the bobbin itself, the next process such as steam setting may be repeated several times, which is not desirable in terms of durability. As shown in Fig. 7) and Utility Model Publication No. 39-22923, a cylindrical body made of a soft material such as rubber or synthetic resin is fitted into the spindle in the space created near the spindle base depending on the fitted state of the bobbin, and the cylindrical body is In some cases, a notch is provided in the upper part of the body to guide the thread ends, and the accumulated thread ends are cut off with a knife or the like at an appropriate time to be removed. However, the thread ends must always be removed by an operator, making it unsuitable for automation.

Furthermore, in the case of U.S. Pat. No. 3,518,823 (Figure 8), the spindle base and the inside of the bobbin are processed to capture the thread, and the end of the thread cut by the cutter after doffing is held and moored. The next time you doff the yarn, be sure to catch the end of the yarn (there is no guarantee, and it can be said that the only thing that can be done is to prevent the end of the yarn from slipping out).

As described above, in the prior art, it was necessary to attach or attach a member for anchoring the yarn end to the inside of the bobbin and to the spindle where the bobbin fits.

Problems to be Solved by the Invention In the prior art as described above, it is sufficient if the thread connected to the end of the doffing chicken is successfully moored to the thread end mooring part of the spindle, but there is no guarantee that the thread will be captured reliably. , pasting cloth, etc. to the inside of the bobbin is not desirable in terms of bobbin management, as the cloth may wear out or fall off, both during bobbin processing and from the subsequent work process. Processing the spindle, especially pasting fluffy cloth on the thin upper part of the spindle, is also not a good idea from the standpoint of reliability.

Therefore, the mooring at the part where the bobbin fits is sometimes stopped, and a knurling is cut in the lower part of the yarn tail cutting tooth near the bobbin base, so that the cut yarn tail end is caught there. However, in this case, the end of the thread cannot be caught until it is wound several times, and if the end of the thread has been doffed several times, the accumulated end of the thread must be cut off with another blade, or the end of the thread cannot be captured after winding around a few turns. In this case, a separate holding plate was required.

Means for Solving the Problems Therefore, in the present invention, processing for catching the thread tail is eliminated on both the bobbin and the spindle into which the bobbin is fitted, so that the thread tail cutting tooth section is not processed. At the bottom, a radial projection with a short pile was provided to hook the ends of threads, making it easier for threads to be removed by centrifugal force.

When performing automatic doffing, the spinning machine frame starts to stop and the ring rail is lowered. Traveler then
The thread tail hooked on the thread tail is pulled below the thread tail cutting tooth, and the thread tail is hooked on the radial protrusion provided at that position. On the other hand, when the thread tail is captured in this way and the doffing bobbin, which has become a groove, is pulled upward, the thread tail remains captured by the protrusion and is pulled, causing the thread tail cutting teeth to The thread tail is guided to the bottom of the tooth and cut at the corner of the tooth.

Until now, when the thread is wrapped around the protrusion more than a few times, more precisely once or more, the cut tail end of the thread is held down by the thread that connects to the traveler that overlaps with the winding delay, and the thread winding does not loosen. This is convenient for catching the tail end of the thread as it is wound one after another on top of this, but this winding several times actually accumulates the tail end of the thread in that area, which must be removed. However, in the present invention, it was found that the end of the thread can be caught and captured by the protrusion even if the thread is less than - wound.
This winding was made less than -, so that when winding of the empty bobbin was started, the tail end of the thread was discharged to the outside by centrifugal force.

When the spinning rotation becomes normal, the tail end of the yarn, which had been captured by the protrusion, is released from the restraint of the protrusion and flutters in the direction of rotation, and its tip is gradually or all at once torn off and scattered. The scattered fibers are collected by a fiber duct device such as a plow cleaner.

However, the thread tail that is swung around and gradually scattered also moves along the circumferential surface of the thread tail cutting tooth part due to the spinning rotation and is guided to the bottom of the thread, where it is bent and flutters with the spinning rotation.

Then, the thread end winds up just below the cutting tooth. Therefore, in the present invention, a smooth circumferential surface is provided directly below the thread tail cutting tooth and above the radial projection for capturing the thread tail,
The end of the yarn, which has become more easily wrapped as described above, can be easily pulled out with less resistance during the next doffing operation.

Function As described above, the present invention provides a radial projection for catching the yarn between the yarn end cutting tooth and the spindle warb, but when doffing is performed, the ring rail is temporarily lowered. As the thread tail connects to the doffing bobbin via the ring and the traveler, as it descends, it passes through the thread tail cutting tooth section at the spindle base, and further reaches the peripheral surface of the radial protrusion of the lower thread tail catcher. At this time, the spindle is also rotating, so the dragged thread tail is guided to the bottom of the thread tail cutting tooth, reaches the radial protrusion of the thread tail capturer, and the amount of winding around the protrusion is at the thread tail. The brakes are applied to stop the machine so that the windings do not intersect and the windings end in less than a turn.

After the spinning frame has stopped in this way, when the doffing bobbin is pulled out, the end of the thread that has reached the protrusion is caught and captured by the protrusion and is pulled in the direction in which the doffing bobbin is pulled up. If the doffing bobbin is pulled up further in this way, the yarn will break when the shearing force at the end cutting teeth or the tensile stress of the fibers themselves exceeds a limit. This breaking point is usually performed at the yarn end cutting tooth, but the location varies depending on the material of the fiber material. The doffing bobbin whose thread end has been cut off in this way is removed and replaced with a new, empty bobbin. At this time, one end of the cut end, the ring, and the end of the thread connected to the traveler remain captured by the protrusion.

Next, an empty bobbin is inserted into the spindle, and automatic winding begins. However, when winding the yarn around the bobbin for the first time, the left end of the yarn is oriented in such a way that it catches on the protrusion. The yarn that is captured and spun at the start of operation moves to the ring and traveler as the ring rail rises.
After that, the spun yarn is wound onto an empty bobbin, and the spun yarn is wound onto the yarn connected to the tail end of the yarn.

In this way, the end of the yarn cut during the previous doffing, which was held down by the spun yarn on the one hand and captured by the protrusion on the other hand, is released when the normal spinning rotation begins, and the end of the yarn that was captured by the projection is centrifuged by the rotation. It will be released and swung around by the force.

When the fibers are swung around in this way, the tips of the fibers are gradually or all at once scattered or torn off due to air resistance. These scattered fibers are sucked up by a separate fiber duct device such as a plow cleaner to clean the surrounding area.

In this way, the yarn tails are scattered and torn off, but the yarn tails that are not scattered and torn off by being swung around by the spinning rotation, and remain untorn, flutter around in the spinning rotation and are attached to the teeth of the yarn tail cutting teeth. The thread is caught, bent, and wrapped around the smooth circumferential surface just below the cutting tooth of the end of the thread.

As mentioned above, the thread tail that is caught on the protrusion and connected to the doffing bobbin is broken during the doffing operation, but as mentioned above, the thread tail is not always broken at the thread tail cutting tooth part depending on the material of the fiber material. For this reason, the length of the thread tail connected to the empty bobbin may be longer than the circumferential length of the spindle base. Therefore, even if a new empty bobbin is replaced and the thread is dislodged from the protrusion and swung around, the thread tail that gets caught in the teeth of the thread tail cutting tooth and bent is wound onto the smooth peripheral surface directly under the thread tail cutting tooth, there is little frictional resistance. Therefore, I made sure to remove this thread tail and remaining thread the next time I doffed it.

Embodiment An embodiment of the present invention will be explained with reference to FIGS. 1 to 5. (
1) is a spindle rail, (2) is a spindle rail (
1), the bobbin (3) fits into the base of the spindle (2), and rotation is transmitted by the tape (5) hung on the spindle warb (4). Further, (6) is a doffing bobbin in which spun yarn is wound around the bobbin (3) to form a groove, and the top of the bobbin is gripped by a gripping tool (7) for doffing.

On the other hand, the spindle base (2) has thread tail cutting teeth (9) that cut the thread tail (8) during doffing, and furthermore, radial protrusions (10) are provided at the bottom to capture the thread. It is being This protrusion (10) may be, for example, a short-pile plush, or a synthetic resin protrusion (10) may be formed on the fabric and adhered to the spindle base (2). Furthermore, radial projections (10) may be carved on the spindle base (2) itself.

In short, it is sufficient that the protrusion (10) is generated in a direction that is ejected during normal rotation of the spindle base (2) and caught by tension in the circumferential direction during doffing. In addition, in order to ensure the removal of thread ends and residual threads, the thread end cutting teeth (9
) and the projection (10) is provided with a smooth peripheral surface (16).

In addition, (11) is a ring rail, (12) is a ring, (
13) is a traveler, and the thread (15) passing through the Snell wire (14) is wound onto the bobbin (3) via the traveler (13).

Now, as shown in Fig. 1, the bobbin (3) is grooved and becomes the doffing bobbin (6), and when you want to doff it, first turn over the lappet and snell wire (14), and then attach the ring rail (11) to the doffing bobbin (6). descend. Up until now, when this happens, the layers of thread (15) wound around the bobbin (3), the so-called doffs, are held down on the outside to prevent them from collapsing, and at the end of the winding, preparations for the next doffing are started. In other words, the thread (15) is moved to the bobbin (3) by the descending action of the ring rail (11).
The thread passes through the circumferential surface of the lower thread tail cutting tooth (9) and descends to the upper part of the spindle warb (4) further below. At this position, the thread end (8) forms a loop around the protrusion (10) on the spindle base (2) and is hooked thereon.

At this time, since the protrusion (10) is radial, the thread tail (8) is hooked and captured by the protrusion (10). Now for doffing, grab the top of the doffing bobbin (6) with the gripper (7) and pull it upwards. The thread connected to the lifting bobbin (6) is guided to the bottom of the thread (9a) without sliding around the thread end cutting tooth (9) in an attempt to obtain the shortest distance.
Further, due to the upward pulling action, the thread tail (8) is cut near the thread tail cutting tooth (9) (FIG. 3).

After this, the gripper (7) moves upward and is removed from the spindle (2) to complete doffing.

Next, a replacement empty bobbin (3) is brought in using the gripper (7) and inserted into the spindle (2) from above. After the doffing bobbin (6) is replaced with the empty bobbin (3) in this way, the automatic winding operation begins.

That is, as shown in FIG. 2, the tail end (8) that was cut during the previous doffing is caught in the direction in which it is caught by the radial projections (10). When performing automatic winding now, as the end of the thread (8) is captured by the protrusion (10) as described above, the ring rail (11) is raised and the thread is wound onto the empty bobbin (3) for punch winding. I can do it. This is because the protrusion (10) is still acting on the thread end (8) in the direction of catching in the circumferential direction, and punch winding is started without being unraveled.

Once punch winding is completed in this way, normal spinning rotation occurs thereafter. At this time, as shown in Fig. 4, the end of the yarn tail (8) held by the punch winding (the yarn end cut during the previous doffing) is captured by the protrusion (10), but the spinning rotation is normal. Then, the thread end (8) is displaced from the grip of the protrusion (10) as shown by the phantom line, and is ejected from the spindle base (2) due to the centrifugal force caused by the rotation.

In this case, the tip may be gradually broken off and scattered by rotation, or it may be broken off all at once.

Therefore, it is necessary to clean it with a fiber duct device such as a plow cleaner so as not to adversely affect other yarns.

If the thread tail (8) below the punch winding is completely released in this way, it is convenient because there will be no thread waste remaining during the next doffing, but the thread tail will be bent at the thread cutting tooth (9),
Even if it is wound around the smooth circumferential surface (16), it can be removed from the doffing bobbin (6) without resistance during the next doffing.

In addition, when providing the radial projections (10), the radial projections (10) may be formed on a fabric made of synthetic resin material and attached to the spindle base (2), or radially planted plush, preferably with even hair. It may also be configured by planting it on the fabric and attaching it to the spindle base (2).

Regarding the smooth circumferential surface (16), the cut point of the thread tail (8) of the previous cut that was held down by punch winding is not necessarily located at the bottom of the thread tail cutting tooth (9), and may vary depending on the thread conditions. may be cut at the top. Therefore, in such a case, after automatically winding the thread onto a new empty bobbin (3),

The thread end (8) overlaps the smooth circumferential surface (16) directly below the cutting tooth (9) by more than one turn. This smooth peripheral surface (16
) is small in diameter, this overlap will increase, and the end of the thread (8) may not be cut during the next doffing, and thread waste may remain there.

Therefore, in the present invention, the outer circumferential diameter of this smooth circumferential surface (16) is made the same as the height of the thread catching protrusion (10). By doing this, there is no possibility that the thread ends (8) will collect at the small diameter, as in the case where the diameter is small and groove-like, and the thread remaining on the spindle can be reliably removed. Doffing work can be performed continuously.

In addition, the spindle base (2) itself is engraved with radial thread hooking protrusions with extremely short piles, so that the thread tail (8) is released when the spindle rotates, and the thread tail (8) is released when the spindle rotates at low speed or at a stop. I tried to catch the hook.

Effects of the Invention Since the present invention has the above-described structure, the thread tail is caught and captured by the projections, so that the thread tail can be cut at the same time as the doffing bobbin is replaced, and the thread tail is caught by the radial projections. This allows the empty bobbin to be punch-wound, and with the subsequent normal spinning rotation, the cut yarn ends are released from the protrusions due to centrifugal force, and the yarn ends are torn off from the tip and scattered, so that the next time doffing is not possible. When , there is no yarn left at the base of the spindle, and automatic doffing can be performed continuously.

Furthermore, since the protrusions provided at the base of the spindle have short hair, there is relatively little air resistance during spinning rotation, allowing smooth spinning operations.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the doffing operation by the device of the present invention.
Figure 2 is a side view of the doffing device according to the present invention, showing the state in which a newly replaced empty bobbin is punch-wound. be. Fig. 3 is a perspective view showing the relationship between the end of the thread just before doffing and the protrusion provided on the spindle base, and Fig. 4 shows the end of the thread when a new empty bobbin has been replaced and punch winding has been performed on it. FIG. 5 is a perspective view showing the relationship between the projection and the projection, and FIG. 5 is a cross-sectional view of the projection. Furthermore, FIGS. 6 to 8 show conventional techniques, in which FIG. 6 shows a type in which a fluff-like material is attached to the inside of the bobbin, and FIG. 7 shows a type in which the thread tail is caught at the base of the spindle. FIG. 8 shows a device in which thread catching protrusions are provided on the inside of the bobbin and at the base of the spindle. 2 Niss spindle base 10: Radial protrusion 4 Niss spindle warb 13 Nis labeler 6: Doffing bobbin
15: Thread 8: Thread tail 16: Smooth peripheral surface 9: Thread tail cutting tooth part

Claims (4)

[Claims] (1) A spindle residual yarn removal device during doffing, characterized in that a radial protrusion with short hair is provided between the yarn end cutting tooth at the spindle base and the spindle warb. (2) The spindle residual thread removal device during doffing according to claim 1, wherein the protrusion is formed on a synthetic resin fabric and is attached to the spindle base. (3) A radial protrusion with short hair is provided between the yarn end cutting tooth at the spindle base and the spindle warb, and
A spindle residual yarn removal device during doffing, characterized in that a smooth circumferential surface is provided between the yarn end cutting tooth and the projection. (4) The spindle residual yarn removing device during doffing according to claim 3, wherein the smooth circumferential surface is at the same height as the yarn catching protrusion.