JP2746230B2 - Spinning winder and yarn end processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning winder capable of preventing floating of a yarn end until the full bobbin stops rotating and dropping to a bobbin end surface, and a method of treating such a yarn end. .

[0002]

2. Description of the Related Art This type of spinning winder will be described with reference to FIG. FIG. 7A is a side view of the spinning winder, and FIG. 7B is a front view of the spinning winder. A take-up winder (also referred to as a take-up winder) 10 includes a base frame 12, a main body frame 13 having a lifting frame 14, a turret plate 15, and a fixed frame 17 having an operation box 16 at the end, and a base frame 12. It is composed of the pivoting separators 19 and 20 attached.

[0003] The elevating box 14 which can be moved up and down supports a touch roller 14a and a traverse device 14b. The turret plate 15 can rotate around the rotation shaft 15a at every 180 ° by a driving device (not shown). The turret plate 15 is provided with two upper and lower bobbin holders 18 protruding therefrom. The upper bobbin holder 18 is at the winding position a, and the lower bobbin holder 18 is at the standby position b.

[0004] In this spinning winder 10, the yarn YE passes between the touch roller 14a and the traverse device 14b and is wound by an empty bobbin 11 at a winding position a.
When the full bobbin 11 is formed at the winding position a, the turret plate 15 rotates by 180 °, and the full bobbin 11 moves to the standby position b.
And the empty bobbin 11 is switched to the winding position b as shown in the drawing. Simultaneously with the rotation of the turret plate 15, the revolving separators 19 and 20 close as indicated by a two-dot chain line. At this time, the yarn YE is placed in the empty bobbin 1 at the winding position a.
1 is slid over the bobbin 11 at the standby position b. In this state, a thread transfer device (not shown) provided at the tips of the revolving separators 19 and 20 is operated, and the yarn reaching the full bobbin 11 is moved to the end to the extent that it does not fall down, while the yarn bobbin 11 is stopped. The yarn is moved to the empty bobbin 11 by moving the yarn. Thereafter, the full bobbin 11 at the standby position b is decelerated by an electric brake or a mechanical brake of the inverter, and eventually stops rotating.

After the above-described yarn passing, the full bobbin 11 is pushed out by the pusher 21 and a doffing operation for replacing the empty bobbin 11 with the empty bobbin 11 is performed. And the turning separator 19,
20 is opened and becomes a standby position indicated by a solid line. While the two bobbin holders 18 are switched between the winding position a and the standby position b in this manner, the yarn YE continuously supplied is supplied to the bobbin holder 18,
The bobbins 11, 18 mounted are wound up alternately.

[0006]

SUMMARY OF THE INVENTION Standby position b after thread transfer
The rotation of the full bobbin 11 is stopped while decreasing its rotation speed. Further, the full bobbin 11 remains free with the cut yarn end after the yarn transfer. When the number of rotations is high, such as during winding, this yarn end is located along the bar winding position on the package peripheral surface due to air resistance and centrifugal force. However, when the number of rotations decreases, the yarn is loosened at the lower part of the package due to its own weight. Wind generated by the bobbin 11 at the upper winding position a and wind in the factory, etc., passed through the rotating separators 19 and 20 and affected the full bobbin 11 at the lower standby position b. The yarn end 22 floats, and the end surface may drop around the end of the bobbin, which is the core of the package, or the end may be wound. In addition, in the worst case, the thread end may enter the bobbin at the time of extrusion in the worst case. If the end surface is dropped or the end is wound as described above, the yarn end will not be caught at the time of unwinding in the next process, which will cause a failure in automatic unwinding start.

Accordingly, the present invention has been completed as a result of intensive studies to solve such problems of the prior art.
It is an object of the present invention to provide a spinning winder capable of winding a yarn end of a surface layer of a full bobbin so as not to be loosened from a peripheral surface. An object of the invention described in claim 2 is to provide a yarn end processing method of a spinning winder capable of winding such a yarn end around a peripheral surface. Claim 3
According to the invention described in claim 2, in addition to the object of the invention described in claim 2, a yarn end processing method of a yarn winding machine in which the yarn end of a full bobbin is entangled with another yarn of the surface layer and fixed so that the yarn end is not unwound. It is intended to provide.

[0008]

According to a first aspect of the present invention, there is provided a bobbin holder which is switchable between a winding position and a standby position. A yarn winding machine in which yarn transfer is automatically performed from a full bobbin at a position to an empty bobbin at a winding position, wherein the yarn is about to hang down by the time when rotation of the full bobbin stops after yarn transfer. A nozzle for sucking the end is provided, and the nozzle is configured so that the sucked yarn end can be pulled out while rotating the full bobbin against the suction. The yarn end that hangs down and floats is sucked from the nozzle, but since the full bobbin is in the middle of rotation to stop, it is pulled out against the suction of the nozzle,
It is wound while being pressed against the yarn layer surface. This operation is repeated when the yarn end tries to hang down, and the yarn end winds around the yarn layer surface and is caught by several bobbin rotations. Further, according to the second aspect of the present invention, the yarn end is switched from a full bobbin to an empty bobbin, and the yarn end that is going to hang down before the full bobbin rotating while swinging the cut yarn end stops. Is provided with a predetermined suction force, and a step of drawing out the yarn end once sucked together with the rotation of the full bobbin and winding the yarn end against the suction force is provided, and by repeating this step several times, the full bobbin is removed. The yarn end is stuck to the yarn layer surface without falling from the bobbin end surface. According to such a process,
Since the winding of the yarn end around the peripheral surface forming the surface of the yarn layer is performed under the suction force, the yarn end is stuck to the surface of the yarn layer in several repetitions. According to a third aspect of the present invention, in addition to the second aspect, the full bobbin is reversely rotated after the step,
In addition to capturing the yarn end stuck to the surface of the yarn layer, a step of adding twist to the captured yarn end to entangle it with another yarn on the surface of the yarn layer to prevent the yarn end from unraveling is added. Then, the step of preventing the yarn end from being unraveled is performed continuously with the yarn end catching step.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view of a portion related to yarn end processing taken out of a spinning winder, FIG. 2 is a longitudinal sectional view of a nozzle of the spinning winder, and FIG. FIG. Since the basic structure of the spinning winder is the same as that described with reference to FIG. 7, the parts that perform the same operations are denoted by the same reference numerals and description thereof is omitted.

First, the structure of the spinning winder will be described, and then the yarn end processing method will be described. 1 differs from FIG. 7 in the structure of the revolving separator 19. The point that the revolving separator 19 has the partial separator 1 and the nozzles 2 are mounted on the partial separator 1 at a predetermined mounting pitch P is different from the conventional one. A yarn end process is performed in which the yarn end is wound around the package peripheral surface (yarn layer surface) so that the yarn end does not float at these different portions.

The revolving separator main body 19a has a boss 23, and the boss 23 is inserted into the shaft 24. The shaft 24 is fixed at both ends by brackets 25 as shown. Reference numeral 19b denotes reinforcing plates at both ends of the revolving separator main body 19a. A drive cylinder 26 is mounted between the turning separator main body 19a and the main body frame 12, and the turning separator main body 19a is rotatable between a retracted position indicated by a solid line and an operating position indicated by a two-dot chain line.

A rectangular notch 19 is formed in a portion of substantially the entire length excluding both ends of the revolving separator main body 19a and near the shaft 24.
c is provided. The partial separator 1 is fitted so as to fill the notch 19c without a gap, and the partial separator 1 is inserted into the shaft 24 at the boss portion 26. The revolving separator body 19a and the partial separator 1
And a drive cylinder 28 is mounted between them. Therefore, a parent-child relationship is formed in which the partial separator 1 further turns by the angle β with respect to the turning separator body 19a after the turning separator body 19a turns by the angle α to reach the operating position. Note that the revolving separator main body 19a and the partial separator 1 jointly function as a partition plate,
The swung yarn end is guided along the partition plate.

A nozzle 2 is provided above the partial separator 1.
Are attached at a predetermined pitch P. The mounting pitch P matches the length of the bobbin 11, and the nozzles 2 corresponding to the number of the bobbins 11 are provided. The mounting position of the nozzle 2 is such that when the revolving separator body 19a revolves by the angle α and the partial separator 1 revolves by the angle β, the tip of the nozzle 2 is just wound around the thread end of the full bobbin 11. It faces a part (a part of the distance L from the end, near the side of the full bobbin 11).

An air pipe 3 for suction and an air pipe 4 for twisting are commonly connected to each nozzle 2. The details of the nozzle 2 are shown in FIG. The suction nozzle 2 has a structure in which a suction nozzle portion 6 and a swirling nozzle portion 7 are provided for a center hole 5. Suction nozzle part 6
Are provided diagonally toward the suction direction of the center hole 5, and suction in the direction of arrow A is performed by an accompanying flow accompanying the ejection of air from the suction nozzle unit 6. Further, the suction nozzle 2 has a storage section 8 for storing the sucked yarn so that it can be pulled out again. Although air passes through the storage section 8, the yarn ends in the storage section 8 are stored without being entangled. The storage section 8 may be provided as a rear end opening section of the nozzle 2 shown.

The swirling nozzle portion 7 has four ejection holes 31 which pass through the balloon controller ring 33 of FIG. 2 and tangential to the center hole 5 as shown in FIG. This spout 3
1 to form a swirling spiral airflow B
And twisting is applied to the sucked yarn end.

Each of the common parts of the air pipes 3 and 4 in FIG.
Therefore, by adjusting the amount of the variable aperture C, the suction force and the twisting force on the yarn can be adjusted.

Next, a yarn end processing method using the spinning winder having the above-described configuration will be described with reference to FIG. FIG. 4 shows a yarn end processing step of pulling a yarn end that is going to float by its own weight and falling to the surface of the yarn layer before the full bobbin stops.

In FIG. 4, as shown in FIG. 4A, the turret plate 15 is rotated by 180 degrees in the direction of the arrow shown in the figure, the full bobbin 11 is at the standby position b, and the empty bobbin 11 is newly at the winding position a. come. At this point, the yarn YE is still wound on the full bobbin 11. Next, as shown in FIG. 4 (b), the revolving separators 19 and 20 become the operating position, and the full bobbin 11
While forming a rod winding at the end of the thread, the thread is passed over the slit of the empty bobbin 11 and winding on the empty bobbin 11 is started. Initially, the full bobbin 11 rotates at a high speed, so that the yarn end is swung with a length that balances air resistance and centrifugal force, and does not fall off the end surface of the full bobbin. However, the yarn end is not completely stuck, and the partial separator is integrated with the revolving separator main body to smoothly guide the yarn end so that the yarn end does not hit and be shaved. Next, as shown in FIG. 4 (c), when the rotation speed of the full bobbin 11 in the direction of the arrow X (winding direction) is reduced while the revolving separators 19 and 20 are closed, the lower peripheral portion of the package peripheral surface is reduced. As a result, the yarn end 22 tries to fall under its own weight and becomes loose. At this time, if wind due to the high-speed rotation of the bobbin 11 at the winding position a is generated so as to pass through the revolving separators 19 and 20, or if there is wind in the factory, the yarn end 22 tends to float. Prior to the timing when the floating starts, the partial separator 1 is turned as shown in the figure, and the nozzle 2 faces the bar-wound portion of the yarn end 22. Simultaneously with the rotation of the partial separator 1, the solenoid valve V of the air pipe 3 of the nozzle 2
Is fully opened, and the suction of the yarn end starts.

Then, as shown in FIG. 4 (d), the yarn end 22 that is going to hang down is sucked in advance by the nozzle 2. Since the full bobbin 11 continues to rotate as it is, the yarn end 22 sucked by the nozzle 2 is pulled out against the suction force, and the yarn end 22 is wound again with tension applied to the surface layer. This state is shown in FIG. This FIG. 4 (c) and FIG.
By repeating the state of (e) for several rotations, the yarn end is wound and stuck in a state where tension is applied to the yarn layer surface of the full bobbin. The solenoid valve V of the air pipe 3 is closed after a few seconds by a timer or the like.
By then, the winding of the yarn end around the surface has been completed. By winding the yarn end, the yarn end at the same position (bar winding position) of the full bobbin 11 can be secured, and work after unwinding the yarn end (such as unwinding) can be easily performed.

One of the subsequent operations is fixing the yarn end. This method of fixing the yarn end includes a processing method of fixing the yarn end to a predetermined position with an adhesive or an adhesive tape, and a fluid nozzle having a groove along a winding direction on a bobbin surface where a yarn end exists. There is a treatment method in which compressed air is blown onto the surface of a bobbin including the yarn end and the yarn end is entangled with the surface yarn. In the former method, in order to fix the yarn end with an adhesive or an adhesive tape, it is necessary to apply an extra substance such as an adhesive or an adhesive tape to the yarn end, which makes maintenance difficult and difficult. The damage is great. In the latter method, on the other hand, the fluid nozzle is pressed directly against the package surface, and strong compressed air is blown from the fluid nozzle onto the package surface. However, it is difficult to find the yarn end pushed into the surface of the wound yarn, and the yarn end is inferior in terms of unwinding. However, a yarn end fixing process for preventing the yarn end from floating can be performed after the above-described yarn end floating prevention step while solving these disadvantages.

The yarn end fixing process will be described with reference to FIG. In FIG. 5, the nozzle 2 is enlarged for easy understanding of the yarn end fixing process. When the operation of FIG. 4 is completed, the operation proceeds to the operation shown in FIG. After the rotation of the full bobbin 11 is stopped as shown in FIG.
Rotate slowly in the direction. At this time, the solenoid valves V of the pipes 3 and 4 in FIG. 1 of the nozzle 2 are fully opened, suction of the yarn end is started, and compressed air is caused to flow into the swirling nozzle portion. First, the yarn end 22 is captured again from the surface layer. Since the yarn end 22 is stuck at a predetermined position (bar winding position), there is no failure to catch the yarn end. After that, the yarn end 22 captured in FIG. 5B has a strong torque within the swirl nozzle portion, and therefore has a return torque in a certain range L. FIG. 5 (c)
As described above, the entire yarn end 22 generates a rolling force on the surface layer of the package P and entangles and traps the filament which is the surface yarn portion. In the illustrated example, the rotation direction of the twisting swirl nozzle portion is set clockwise so that the yarn end 22 rolls toward the center in the width direction of the package P. By doing so, the yarn end 22 does not come off the surface layer of the package P, and is easily entangled. As shown in FIG. 5D, the yarn end 22 is wound around the surface layer of the package P by continuing the reverse rotation. The variable throttle C in FIG. 1 is adjusted so that the suction force of the suction nozzle portion is weaker than the binding force of the yarn end 22 entangled with the filament. As shown in FIG. 5E, all the yarn ends 22 captured by the nozzle 2 are pulled out and wound on the surface layer of the package P to complete the yarn end processing.

FIG. 6 is an enlarged plan view of a main part showing the mode of the yarn end processing of FIG. With reference to FIG. 6, a description will be given of a mode of the yarn end processing for preventing unraveling. When the yarn ends are entangled with the surface layer of the package, the number of entangled filaments may be one or several. Also, if the whole yarn is entangled,
Sometimes it is entangled with two yarns. The following is a microscopic examination of the situation in which the yarn end 22 to which the strong twist is imparted entangles the filament f. The yarn end 22 wound around the surface of the full bobbin by the suction force rotates around the yarn axis at a fixed position, and the rotation causes the filament f of the surface to be entangled and wound up. Moreover, as shown in FIG. 6 (a), the form of the yarn end 22 which is twisted and shrunk in the axial direction and the radial direction and which is formed into a hard spiral overall promotes the entanglement, and finally, as shown in FIG. ). FIG. 6B shows a state in which the yarn end 22 is entangled with the filament f on the surface layer of the full bobbin, that is, a state in which the S twist and the Z twist are separated and entangled. The yarn end 22 entangled with the filament f can be confirmed from its form at a glance. S
When the tangled yarn ends 22 are pulled in the mixed state of Z, both twists cancel each other.

Therefore, in the case of the yarn end treatment that is difficult to unwind in this mode, the yarn end can be unwound without causing a single yarn break of the filament f. Since the twisting force of the air flow of the swirling nozzle portion of the nozzle used in this example is a high-speed rotation of about 300,000 twists / minute, the entanglement operation is actually performed instantaneously. The form after the yarn end processing differs depending on the twisting force and the like of the swirling nozzle portion. However, as shown in FIG. 6C, the whole proceeds further from the state of FIG. It often exhibits a entangled form as it occurs. In this configuration, the yarn end 22 is strongly entangled, and when the yarn end 22 is pulled for unwinding, a single yarn break may occur. However, it is easier to confirm the processed yarn end 22. Note that there are the following three methods for achieving the state shown in FIG. The first method is a method in which twisting is continuously applied for a certain period of time, the second method is a method in which the package is reversed after entanglement, and the third method is to use the yarn end processing device itself instead of the reverse rotation. It is a method of moving to the upstream side of.

The method of processing the yarn end using the nozzle 2 has been described above. In a preferred embodiment, the distance between the position of the tip opening of the nozzle 2 and the surface of the full bobbin 11 may be adjusted. The twisting force of the air flow at the swirling nozzle portion of the nozzle is preferably 300,000 twists / minute as described above,
Even in the range of 400,000 twists / minute, the above object can be achieved. Furthermore, although the cheese-shaped full bobbin has been described above, a pan-shaped winding bobbin or the like may be employed in the yarn end treatment of the present invention. The means for twisting the yarn end is not limited to the nozzle 2 described above, but may be another twisting device such as a belt-type nip twister. The fixing step for preventing the yarn ends from being unraveled can be continuously performed.

[0025]

As described above, according to the first aspect of the present invention, the yarn end which is going to hang down before the rotation of the full bobbin stops after the yarn transfer is sucked by the nozzle. Since the yarn end is pulled out while being opposed to the suction, and wound around the bar winding position on the surface layer and pulled, it is possible to prevent the yarn end, which tends to float as the full bobbin rotation decreases, from dropping onto the bobbin end surface, and the like. It can be ensured that it always exists at a predetermined position on the surface layer (for example, at a bar winding position). The second aspect of the invention is the same as the effect of the first aspect of the invention, in which the step of winding the yarn end onto the surface layer and pulling the yarn end several times is performed to wind the yarn end at a predetermined position as described above. Is easily done. The invention according to claim 3 is the invention according to claim 2.
In addition to the effect of the invention described, by performing the reverse rotation of the full bobbin and twisting the yarn end following the winding of the yarn end, the yarn end fixed to the surface layer of the full bobbin can be reliably fixed. In use, the yarn end can be easily taken out.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a main part showing one embodiment of a spinning winder of the present invention.

FIG. 2 is a longitudinal sectional view of a nozzle of the spinning winder of the present invention.

FIG. 3 is a sectional view of a swirl nozzle portion of the nozzle.

FIG. 4 is a schematic diagram illustrating a yarn end treatment method of the present invention, particularly a step of winding the yarn end.

FIG. 5 is a schematic diagram illustrating a yarn end treatment method of the present invention, particularly a step of fixing the yarn end.

FIG. 6 is an enlarged plan view of a main part showing a state of a yarn end process for tangling a yarn end.

FIG. 7 is a view showing a conventional spinning winder;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Partial separator 2 Nozzle 3 Air piping 4 Air piping 6 Suction nozzle part 7 Revolving nozzle part 8 Storage part 10 Spinning winder 11 Bobbin (full bobbin or empty bobbin) 18 Bobbin holder 19 Revolving separator 19a Revolving separator main body 19b Notch 22 Thread end a Winding position b Standby position

Claims (3)

(57) [Claims] 1. A spinning winder having two bobbin holders that can be switched between a winding position and a standby position, and automatically performing yarn transfer from a full bobbin at a standby position to an empty bobbin at a winding position. A nozzle is provided for sucking a yarn end that is going to hang down by the time when the rotation of the full bobbin after the yarn transfer is stopped, and the nozzle is configured such that the sucked yarn end is rotated with the rotation of the full bobbin. A spinning winder characterized in that it can be pulled out against suction. 2. A thread is switched from a full bobbin to an empty bobbin, and a predetermined suction is performed on a yarn end that is going to hang down until the full bobbin rotating while swinging the cut yarn end stops. A step of sucking out the yarn end once sucked with the rotation of the full bobbin and winding it while countering the suction force is provided several times, and by repeating this step several times, the yarn end of the full bobbin becomes A method of treating a yarn end of a spinning winder so as to be stuck on a layer surface. 3. After the above step, the full bobbin is rotated in the reverse direction to catch the yarn end stuck on the surface of the yarn layer, twist the captured yarn end and entangle it with another yarn on the surface of the yarn layer. 3. The yarn end treatment method for a spinning winder according to claim 2.