JPH0315562Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to spinning machines, yarn twisting machines, etc., for use in spinning machines, yarn twisting machines, etc. The present invention relates to an improvement in a tail yarn processing device that clamps and automatically releases the ends of the wound yarn, including the portion stretched between them.

[Conventional technology]

In spinning machines, yarn twisting machines, etc., when automatically replacing a full bobbin using an auto-doffer device, in order to ensure automatic winding of thread onto the bobbin, there is a number of It is necessary to firmly fix the wrapped tail thread so that it does not move. If the tail thread moves due to a slight force at the tail thread winding section, when the ring rail rises to the bobbin thread winding start position, the end of the thread may become loose, causing the traveler's posture. It is easy to break the thread and cause thread breakage at the start of operation.

The biggest reason why it is difficult to firmly fix the tail thread to the tail thread at the spindle base is the presence of the tail thread wound around the tail thread. In other words, the tail thread at the tail end of the spindle base is wound around the knurling surface several times to prevent it from moving, but the crossover thread that connects the bobbin to the end thread is not cut until the next doffing operation. Therefore, each time the doffing is repeated, a new piece of string is wrapped around the string several times.

When a new tail thread is wound on top of the remaining tail thread that was previously wrapped, the effect of fixing the position of the tail thread by the knurling surface etc. disappears, and the tail thread moves with a slight external force and loosens. begins to occur.

Conventionally, in order to eliminate such inconveniences, the remaining tail threads have been periodically removed manually using a cutter or the like when the machine is stopped. However, in this conventional method, the work is complicated and labor-intensive, and the work requires a great deal of time, so there is a problem that the operating efficiency of the machine is deteriorated.

Therefore, in order to solve the problems of the prior art, to securely fix the tail thread to the spindle base, and to reliably dispose of the tail thread remaining during machine operation, the present inventor first fixed the tail thread to the spindle base. An upper slit ring is fixed to the upper slit ring, and a cylindrical body having a lower slit ring thereunder and whose lower part expands by centrifugal force is fitted so as to be slidable in the axial direction of the base of the spindle, and further the cylindrical body is expanded. The lower end of the opening can come into contact with a guide surface fixed to the spindle base, and the upper slit ring and the lower slit ring are pressed to form a tail thread holding part, and the lower part of the cylinder body is moved by the centrifugal force of the spindle. We proposed a tail thread processing device in which, when expanded, the cylindrical body slides downward in the axial direction of the spindle base, releasing the pressed state between the upper slit ring and the lower slit ring (Japanese Patent Application No. 130632/1988). No. Specification).

[Problem that the invention attempts to solve]

However, when such a device is used, as the lower part of the cylindrical body is repeatedly expanded and restored, fatigue occurs in the lower part of the cylindrical body, and the restoring force when the spindle is stationary weakens, causing the lower slit ring to The pressing force may decrease, making it impossible to securely fix the tail thread with the tail thread clamping part.

The present invention was developed against the background of the above-mentioned technical problem, and even after long-term use, the restoring force of the lower part of the cylindrical body does not decrease, and the strong tail thread (crossover thread) at the tail thread clamping part is maintained. ) The purpose is to provide a tail thread processing device that can maintain a fixing effect, and in cases where the remaining threads of the tail thread are not released from the tail thread clamping part during adjustment when the tail thread processing device is newly installed. ,
It is an object of the present invention to provide a tail thread processing device that can easily remove the tail thread remaining and improve the effect of fixing the tail thread (crossover thread) to the tail thread holding part.

[Means to solve the problem]

In the present invention, an upper slit ring is fixed to the spindle base, and a cylindrical body having a lower slit ring at the upper end and whose lower part expands due to centrifugal force is fitted under the upper slit ring so as to be slidable in the axial direction of the spindle base. The expanded lower end of the cylindrical body can be brought into contact with a guide surface fixed to the spindle base, and the upper slit ring and the lower slit ring are pressed to form a tail thread clamping part, and the spindle is centrifugally When the lower part of the cylindrical body is expanded by force, the cylindrical body slides downward in the axial direction of the spindle base, thereby releasing the pressed state between the upper slit ring and the lower slit ring, The lower part of the cylindrical body is divided by a plurality of slits, and a spring is provided for actively restoring the lower part of the cylindrical body from the expanded state to the original state when the spindle is stationary. This company provides tail yarn processing devices for spinning machines, yarn twisting machines, etc.

As this spring, an annular spring fitted to the outer periphery of the lower part of the cylindrical body or a plate spring provided at the lower part of the cylindrical body can be used. In order to improve the effect of fixing the tail thread (crossover thread) to the tail thread holding part, a predetermined number of radial grooves directed toward the outer circumference may be carved on the upper surface of the lower slit ring.

[Effect]

The tail thread processing device of the present invention not only uses the elasticity of the cylinder itself to restore the lower part of the cylinder from the expanded state to its original state when the spindle is stationary.
Because it also utilizes the force of a separate spring,
The lower part of the barrel body is actively restored to its original state, and as a result, the tail thread (crossing thread)
is securely and firmly fixed.

Additionally, the materials that make up the cylindrical body, such as plastic and metal, can lose their elasticity due to fatigue when used for a long period of time, but the tail thread processing device of this invention uses a spring. For,
Even after long-term use, the lower part of the cylinder does not lose its restoring force.

Furthermore, by carving outward radial grooves on the upper surface of the lower slit ring, the remaining yarn from the tail thread is caught in the tail thread pinching part of the spindle where the main tail thread processing device is newly installed. If the remaining thread is not released from the end, for example, by inserting a hook-shaped jig or the like from the outside into this radial groove to catch and remove the remaining thread, the remaining thread can be easily removed and the thread can be removed. When winding the thread around the bobbin, the tail thread at the beginning of winding of the thread is wedged into the upper part of the edge of the radial groove, thereby further improving the effect of fixing the tail thread to the tail thread holding part.

〔Example〕

Hereinafter, the apparatus of the present invention will be explained with reference to the drawings.

FIG. 1 is a side sectional view showing an example of the device of the present invention, in which a blade holder 4 equipped with a cutting blade 3 is fixedly installed above the base of a spindle 2 on which a bobbin 1 is mounted. In this embodiment, the blade holder 4 and the upper slit ring 5 are used together, but the blade holder 4
An upper slit ring 5 may be separately fixed below. Upper slit ring 5 (cutter holder 4)
A cylindrical body 8 having a lower slit ring 6 at its upper end and whose lower part 7 expands due to centrifugal force is fitted under the cylindrical body 8 so as to be slidable in the axial direction of the spindle base 2.

The lower end 9 of the expanded portion (lower portion) 7 of the cylindrical body 8 is arranged so that a lower fixed guide surface 10' fixed to the spindle base 2 can come into contact with it.

By pressing the upper slit ring 5 (blade holder 4) and the lower slit ring 6, the tail thread clamping part 11 is formed, and when the spindle rotates and the lower part 7 of the cylinder body 8 expands due to centrifugal force, The lower end 9 comes into contact with the fixed guide surface 10 and acts to slide the cylinder 8 downward in the axial direction of the spindle base (in the direction of arrow A), releasing the pressed state between the upper slit ring 5 and the lower slit ring 6.

In addition, the code Y indicates the yarn wound around the bobbin 1, the code 12 indicates the jump yarn from the tail thread holding part 11 to the bobbin 1, and the code 12' indicates the tail threads (7th to 8th) which are the jump threads 12 after cutting. (see figure), reference numeral 16 is an annular coil spring fitted in a groove 17 on the outer periphery of the lower end 9 of the lower part 7 of the cylindrical body 8, and reference numeral 18 is a cover.

As shown in FIGS. 2 and 3, the cylindrical body 8 is
The upper end constitutes the lower slit ring 6, and the lower part 7 constitutes the lower slit ring 6.
is divided by a plurality of slits 13 and is expanded by centrifugal force. The shape of the lower end 9 of the lower part 7 is not limited to the rectangular shape shown, but can be any shape such as a circle or an ellipse.

Further, the cylindrical body 8 can be made of any material such as metal or plastic as long as its lower part 7 and lower end 9 can be expanded by centrifugal force.

A groove 17 is bored in the outer periphery of the lower end 9 of the lower part 7 of the cylinder 8, and an annular coil spring 16 is inserted into the groove 17.
When the spindle is stationary, the lower part 7 of the cylinder 8 is fitted.
And the lower end 9 is actively restored from the expanded state to the original state (FIG. 2). Instead of providing the annular coil spring 16, a leaf spring 16' may be embedded or bonded to the lower part 7 of the cylindrical body 8, as shown in FIG. type of spring,
The shape is arbitrary, as long as the lower part 7 and lower end 9 of the cylinder body 8 can be returned from the expanded state to the original state when the spindle is stopped and the centrifugal force ceases to work. good.

The strength of the springs 16, 16', the material of the cylinder 8,
By appropriately selecting the thickness of the lower part 7, the number and shape of the slits 13, etc., the cylindrical body 8 is slid downward at a desired spindle rotation speed, and the pressed state between the upper slit ring 5 and the lower slit ring 6 is adjusted. can be made to be released.

The cover 18 prevents fluff, etc. from entering the fixed guide during operation when the cylinder body 8 is pulled down by the rotational centrifugal force of the spindle, and the remaining yarn from the tail yarn is released and removed from the tail yarn clamping part. It may be constructed integrally with the lower slit ring 6.

Further, the ends of both slit rings 5, 6 may not be in the widened shape as shown in the figure, but may be in a flat shape.

Next, the operation of the device of the present invention when the device shown in FIG. 1 is used will be explained with reference to FIGS. 4 to 8.

Note that the same parts as in FIG. 1 are given the same numbers as in FIG. 1, and the explanation thereof will be omitted.

First, FIG. 4 shows the state immediately before starting winding onto the bobbin 1 in a spinning machine, a yarn twisting machine, etc. The cylinder body 8 is pushed upward and the upper slit ring 5
The lower slit ring 6 is pressed to form a tail thread holding portion 11. The yarn Y from a roller section (not shown) of a spinning machine, a twisting machine, etc. passes through a traveler 15 fitted to a ring 14, and its end touches the tail yarn clamping section 11 within about half to one turn. It is wrapped around and held in place.

Next, when winding is started, the ring 14 rises to the winding position of the bobbin 1 as shown in FIG. A crossover thread 12 is formed between the bobbin 1 and the bobbin 1. The ring rail 15 and the ring 4 reciprocate within the end thread winding position range of the bobbin 1,
When the winding of the yarn Y is started on the bobbin 1 as shown in the figure, and then the rotational speed of the spindle 2 is increased to a predetermined rotational speed as shown in FIG. It expands due to the force, and the lower end 9 comes into contact with the fixed guide surface 10.

Then, the movement of the lower end 9 is restrained by the fixed guide surface 10, so when further centrifugal force is applied, the cylinder 8 is automatically pulled down (in the direction of arrow A) and the tail thread is pulled down. The crossover thread 12 held by the holding part 11 is released and removed from the tail thread holding part 11 by the centrifugal force of rotation of the spindle 2, and becomes a tail thread 12'.

At this time, since the upper end of the fixed guide and the lower surface of the lower slit ring 6 are in close contact with each other and covered by the cover 18, there is no possibility that fluff or the like will enter into the fixed guide.

When the yarn Y is fully loaded on the bobbin 1, the ring rail 15 and the ring 14 are quickly lowered to the position of the tail yarn clamping part 11 again as shown in FIG.
The thread at the end of winding is held by the tail thread holding part 11 within one rotation, and the spindle is stopped. In this case, the previous tail string 12' has been completely released and removed from the tail string holding part 11, and as the rotational speed of the spindle 2 decreases, the force of the spring 16 actively moves the lower part of the cylinder body 8. 7 returns to its original state from the expanded state, and the tip 9 reaches the lower fixed guide surface 10'.
Since the cylindrical body 8 is pushed upward by contacting with the cylindrical member 8, and the tail thread clamping portion 11 returns to the pressed state, the end portion of the finished thread Y can be clamped extremely reliably.

Next, after the rotation of the spindle has stopped, the full bobbin is pulled up by an automatic transfer.

At this time, the end portion of the yarn Y formed when the ring 14 is lowered to the position of the tail thread holding portion 11 is pressed against the cutting blade 3 under tension and cut.

By repeating the above operations, pipe replacement work can be performed automatically.

As shown in FIGS. 9 and 10, if radial grooves 19 are formed on the upper surface of the lower slit ring 6 toward the outer circumference, spinning machines, twisting machines, etc. that employ this tail yarn processing device can be used. If newly installed,
Or, when the spindle base of a conventional spinning machine, a yarn twisting machine, etc. is changed to a main yarn processing device, the yarn holding portion 11 is cut off during adjustment before production operation.
Gradually reduce the number of times the tail thread is wound around the tail thread holding part 11 to 1 turn or less so that the remaining thread (not shown) of the previous tail thread 12' remaining on the tail thread 12' is automatically released. If the remaining tail thread is not released from the tail thread holding part 11 at the adjustment stage, a hook-shaped jig (not shown) with a hook-shaped tip (not shown) is slid along the radial groove 19. The remaining threads can be removed by removing the threads. In addition, since the end of the yarn Y is wedged into the edge upper part 19' of the radial groove 19 when it is wound around the tail thread clamping part 11, the effect of fixing the tail thread to the tail thread clamping part 11 is further improved.

Furthermore, the number of radial grooves 19 carved is three in this embodiment, but is not limited to this and may be any number, but usually about two to six is appropriate.

In addition, in this figure 9 and figure 10,
The lower slit ring 6 and the cover 18 are integrally molded.

[Effect of idea]

According to the present invention, even after long-term use, the restoring force of the lower part of the cylinder from the expanded state does not decrease, and the lower part of the cylinder can be actively restored from the expanded state to the original state. , it is possible to securely hold the tail string, and it is possible to automatically perform tube change operations without failure.

In addition, by carving a predetermined number of radial grooves toward the outer circumference on the upper surface of this lower slit ring,
The residual thread of the tail thread can be easily removed, and the effect of fixing the tail thread to the tail thread holding part can also be improved.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing an example of the device of the present invention, Figs. 2 and 3 are side views showing an example of a cylindrical body that can be used in the device of the present invention, and Figs. FIG. 9 is a side view including a partial sectional view for explaining the action; FIG. 9 is a side view including a partial sectional view showing another example of a cylinder body that can be used in the device of the present invention; 9 is a plan view showing another example of the cylinder shown in FIG. 9. FIG. 1; bobbin, 2; spindle, 4; flange portion, 5; upper slit ring, 6; lower slit ring, 7; lower part of cylinder, 8; cylinder, 9; lower end of lower part of cylinder, 10; fixed guide surface, 10'; Lower fixed guide surface, 13; slit, 16, 16'; spring, 19; radial groove, 19'; edge portion.

Claims (1)

[Claims for Utility Model Registration] (1) An upper slit ring is fixed to the spindle base, and a cylindrical body having a lower slit ring at the upper end and whose lower part expands due to centrifugal force is attached below the upper slit ring to the spindle base shaft. The expanded lower end of the cylindrical body can be brought into contact with a guide surface fixed to the spindle base, and the upper slit ring and the lower slit ring are pressed to release the tail thread clamping part. At the same time, when the lower part of the cylinder expands due to the centrifugal force of the spindle, the cylinder slides downward in the axial direction of the spindle base, releasing the pressed state between the upper slit ring and the lower slit ring. In the tail thread processing device, the lower part of the cylindrical body is divided by a plurality of slits, and
A tail yarn processing device for a spinning machine, a yarn twisting machine, etc., characterized in that a spring is provided for actively restoring the lower part of the cylindrical body from the expanded state to the original state when the spindle is stationary. (2) The tail yarn processing device for a spinning machine, a yarn twisting machine, etc. according to claim 1, wherein the spring is an annular spring fitted to the lower outer periphery of the cylindrical body. (3) The tail yarn processing device for a spinning machine, a yarn twisting machine, etc. according to claim 1, wherein the spring is a plate spring provided at a lower part of the cylindrical body. (4) A predetermined number of radial grooves directed toward the outer circumference are carved on the upper surface of the lower slit ring.
3. A tail yarn processing device for a spinning machine, a yarn twisting machine, etc. according to any one of Item 3.