JPH08175758A - Yarn end processing method and winder provided with yarn end processing device - Google Patents

Abstract

PURPOSE: To surely fix the yarn end of a winding yarn body by rotating the yarn winding body in the inverse direction of the yarn winding direction so as to capture the yarn end of the yarn winding body and continuing the inverse rotation by a necessary quantity, while applying twist to the captured yarn end. CONSTITUTION: After a solenoid valve(V) is opened, air is sucked from the end of a suction nozzle 1A, and compressed air is made to flow in a twisting nozzle 1B, a package(P) is gently rotated clockwise, inverse of the winding direction. This inverse rotation captures the yarn end YE existing on the surface of a winding rod SW part, in the suction nozzle 1A. When the release by inverse rotation is conitnued, the tip of the captured yarn end YE reaches the center of the nozzle 1B from a yarn guide port 1b by suction of the twistitng nozzle 1B so as to be applied strong twist by receiving action of turning air flow. The applied twist is transmitted to the upper reaches, filaments on the surface thread part of the package(P) are twined around, all the yarn ends YE captured by the suction nozzle 1A are drawn out, and the yarn end YE is fixed to the winding rod SW part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn end treatment of a wound body such as a package or a winding bobbin used in a textile machine. In particular, the present invention relates to a yarn end treatment for preventing an adverse effect caused by the natural unwinding of the yarn end at the end of winding by fixing the yarn end to the wound yarn body. Furthermore,
The present invention relates to a yarn end treatment method suitable for adopting a yarn end treatment method according to another invention of the present invention to an automatic machine, and a winding machine equipped with the yarn end treatment device.

[0002]

2. Description of the Related Art For example, in a chemical fiber spinning winder, a continuously wound yarn is wound up, and a fully wound package is conveyed to the next step or shipped as a product. . In order to prevent the yarn of the outermost layer from unraveling during the transportation of the package, the yarn end at the end of winding is wound around the outermost layer of the package to perform yarn knotting. Otherwise, the unconstrained yarn end will be caught in the outside air flow, for example, it will be entangled with the adjacent rotary shaft and will be unwound unnecessarily, or it will be tangled with other machine parts during transportation, which will cause trouble. is there.

In a spun yarn composed of short fibers, since the fluffs of the yarns are entangled with each other, the yarn end is less likely to be naturally unwound even if it is not subjected to an active yarn end treatment such as filament yarn. . However, since the entanglement of fluff just by pressing the yarn end on the surface of the wound body is weak and lacks in certainty, the above-mentioned accidents frequently occur during rolling of the package or conveyance of the package.

As a method of winding the yarn end around the outermost layer of the wound body for knotting, several alternatives have been conventionally proposed because of the complexity of the operation and mechanism and the low processing efficiency.

The first conventional method is a processing method in which the yarn end is fixed at a predetermined position with an adhesive or an adhesive tape.
In the second conventional method, the surface of the package where the yarn end is present is covered with a fluid nozzle having a groove along the winding direction, and compressed air is blown onto the package surface including the yarn end, This is a treatment method in which the ends are entangled with the surface layer yarn.

[0006]

The first method of fixing the thread end with an adhesive or an adhesive tape is to apply an extra substance such as an adhesive or an adhesive tape to the thread end for fixing the thread end. It is necessary and there is a problem in terms of maintenance. Damage to the surface layer of the wound body is also great. The second method of blowing compressed air to entangle the yarn ends with the surface yarns is a simpler mechanism than the yarn knotting method or the first method described above, but the fluid nozzle is pressed directly against the package surface. However, since strong compressed air is blown onto the package surface from the nozzle, it is unavoidable that the package shape and surface yarn layer are disturbed, and it is difficult to find the yarn end pressed into the surface layer of the wound body, and the yarn end It is inferior in terms of unwindability.

The present inventor has proposed the following method, which is different from the present invention, as a yarn end treatment method that solves the above-mentioned drawbacks of the prior art. This is a method in which twist is applied to the yarn end of the surface layer of the wound body, the filament or fluff in the surface layer is entangled by the rotation of the entire yarn end by twisting, and the yarn end is wound around the filament or fluff and fixed. Further, in order to carry out this method, the yarn end treating device comprises a twisting nozzle for imparting twist to the yarn end of the wound body by a swirling flow.

According to the present invention, it is possible to securely fix the yarn end of the wound body with a simple mechanism without requiring any extra substance, without directly contacting the package with the fluid nozzle or compressed air, Moreover, it is an object of the present invention to provide a yarn end processing method suitable for adopting the above-described yarn end processing method in an automatic machine, in which the yarn end can be easily taken out when the wound body is used.

[0009]

A yarn end treating method according to the first aspect of the present invention rotates a wound yarn body in a direction opposite to a winding direction to suck and catch the yarn end of the wound yarn body, and to catch the yarn end. The reversal is continued for a predetermined amount while applying twist to the formed yarn end.

In the yarn end treatment method according to the second aspect of the present invention, in the above yarn end treatment method, the surface layer of the wound body is wound with a bar before performing the yarn end treatment. A yarn winding machine according to the third aspect of the present invention includes a nozzle that sucks a yarn end of a wound body,
A yarn end processing device including a twisting nozzle for imparting twist to the sucked yarn end by a swirling flow is provided.

[0011]

According to the first aspect of the present invention, the wound yarn body is rotated in the direction opposite to the winding direction, the wound yarn body is unwound so that the yarn end can be caught, and twist is imparted to the caught yarn end. It acts so as to entangle the surface layer yarn portion of the wound body at the yarn end. By the reversal of the wound body that continues even after the completion of the fastening of the yarn end, the yarn end that has been sucked and unwound acts in reverse to be wound around the peripheral surface of the wound yarn body.

The second aspect of the present invention acts so that the yarn end is entangled with the bar-wound portion as a waste yarn, which is applied before performing the above-mentioned yarn end treatment. Further, the winding machine of the third aspect of the present invention can perform the yarn end processing subsequent to the end of the winding of the yarn.

[0013]

1 and 2 schematically show a yarn end treating method of the present invention and a yarn end treating apparatus used in the method for easy understanding.

FIG. 1 shows a package P, which is a wound yarn body wound by a filament winder, and a yarn end treatment device 1 for treating the yarn end YE. Thread end processing device 1
Is a suction nozzle 1A that captures a yarn end by suction using compressed air, and a yarn introduction port 1b that is opened in the middle of the air flow path of the suction nozzle 1A, and twists that impart strong twist to the yarn by the swirling airflow. And a hanging nozzle 1B. Each nozzle has a compressor 2 through a variable throttle C and a solenoid valve V.
The suction force and the twisting force can be adjusted by adjusting the diaphragm amount of the variable diaphragm C.
The package P is provided with a bar winding SW that winds the yarn for a predetermined length without traversing on one end side of the outer periphery of the package P at the end of winding with a winder. Secure to the SW part. Therefore, the suction nozzle 1A is arranged near the surface layer of the package P at a position corresponding to the bar-winding SW portion. Reference numerals 1c and 1d in FIG. 1 denote an exhaust port of the suction nozzle 1A and an exhaust port of the twisting nozzle 1B.

A well-known nozzle can be used as the twisting nozzle 1B. 7 and 8 are sectional views of the twisting nozzle 1B. As shown in the drawing, twist nozzle 1B
Has a plurality of air injection pipes 31 opened substantially tangentially to the nozzle body 32, and the cross-sectional shape of the nozzle body 32 is a conical shape that widens toward the exhaust port 1d.
On the yarn introduction port 1b side of the nozzle body 32, a balloon control ring 33 having a diameter smaller than the inner diameter of the nozzle body 32 is provided.
Is provided. In such a configuration, when compressed air is supplied from the injection pipe 31 into the nozzle body 32, a swirling spiral flow that flows toward the exhaust port 1d side is generated in the nozzle body 32, and the yarn end is swirled by this air flow. , The thread end is pulled out positively.

With reference to FIG. 2, a specific method of thread end treatment and its mechanism will be described. First, as shown in FIG. 2 (a), the solenoid valve V is opened to suck air from the tip of the suction nozzle 1A and allow compressed air to flow into the twisting nozzle 1B.
Gently rotate in a clockwise direction opposite to the winding direction. By this inversion, the yarn end YE existing on the surface of the bar-winding SW portion of the package P is captured in the suction nozzle 1A.

Continuing unwinding by reversal, FIG. 2 (b)
As described above, the tip Ye of the captured yarn end YE reaches the center of the twisting nozzle 1B from the yarn introduction port 1b by the suction force of the twisting nozzle 1B, and is subjected to the action of the swirling air flow to impart a strong twist. To be done. The twist applied to the yarn end YE propagates upstream because a certain tension is exerted by the action of the twisting nozzle 1B. Thread end YE with strong twist
Is a yarn end YE in a certain range L in contact with the package P
The part has a return torque due to strong twist. As shown in FIG. 2C, a rolling force is generated on the entire yarn end YE on the surface of the package, and the filament f, which is the surface yarn portion of the package P, is entangled, and the yarn end YE is fixed to the bar-winding SW portion. To be done. In this embodiment, the twisting nozzle 1B is set to rotate clockwise so that the yarn end YE rolls toward the center of the package P. In this case, even if the thread entanglement in the winding SW portion fails, even if the thread wraps off the winding SW portion, the yarn end YE does not come off from the package P and has an advantage of being entangled in the surface layer of the package P. .

Since the yarn end YE is already fixed to the bar-winding SW portion of the package P, the unwinding of the yarn end YE is wound around the surface of the package P by continuing the reverse rotation as shown in FIG. Turn to. The suction force of the suction nozzle 1A is weaker than the engagement force of the yarn end YE entwining the filament f. Then, as shown in FIG. 2 (e), all the yarn ends YE captured by the suction nozzle 1A are pulled out and wound around the outer periphery of the package P, and the yarn end processing is completed. The number of entangled filaments may be one or several. Further, in some cases, the entire yarn is entangled, and in some cases, two yarns are entangled.

A microscopic examination of the situation in which the yarn end YE to which the strong twist is applied entangles the filament f is as follows. The yarn end YE pressed against the surface layer of the package P by a suction force rotates around the yarn axis at a fixed position, and the rotation causes the filament f on the surface layer to be entangled and wound up.
Moreover, as shown in FIG. 3, the shape of the yarn end YE, which is twisted in the axial direction and in the radial direction and has a generally solid spiral shape, promotes the above-mentioned entanglement, and finally the state of FIG. Becomes FIG. 4 shows a state in which the yarn end YE is entangled with the filament f on the surface layer of the package P, that is, a state in which the S twist and the Z twist are entangled separately in the front and rear. The existence of the yarn end YE entwined with the filament f can be confirmed at a glance from its form. Further, as described above, since the both ends of the target filament f are fixed, S
When the yarn end YE which is entangled in the mixed state of Z is pulled, the twists of both sides cancel each other out. Therefore, with this type of yarn end treatment, 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 twisting nozzle 1B used in this example is a high speed rotation of about 300,000 twists / minute, the entanglement operation is actually performed in an instant. The form after the yarn end treatment differs depending on the suction force of the suction nozzle 1A, the twisting force of the twisting nozzle 1B, etc., but as shown in FIG. 5, the state further advances from the state shown in FIG. In many cases, the whole has a entangled form in which a twist occurs. In this configuration, the yarn end YE is strongly entangled, and when the yarn end YE is pulled for unwinding, single yarn breakage may occur, but it is easier to confirm the treated yarn end YE. There are the following three methods for achieving the state shown in FIG. The first method is a method of continuously applying twist for a certain period of time, the second method is a method of reversing the package after entanglement, and the third method is a method of using the yarn end treating device 1 itself instead of reversing. It is a method of moving to the upstream side of the end.

The suction force of the suction nozzle 1A can catch the yarn end YE of the package P by adjusting the variable diaphragm C,
Moreover, the yarn end YE is favorably introduced from the suction nozzle 1A to the twisting nozzle 1B. Further, the twisting of the yarn end YE to which the strong twist has been applied in the yarn axis direction needs to be a tension that allows it freely.

The above is the case of filament yarn, but the operation is also the same for spun yarn. However, the object to be entangled is not the filament f but the fluff h as the surface yarn portion of the wound body. In the yarn end processing device 1, when the yarn end YE of the spun yarn is subjected to strong twist in the same direction as the yarn twisting direction, the rotating yarn end YE entangles the surrounding fluff h,
The fastening of the thread end is completed. FIG. 6 schematically shows an example of the processing state when the spun yarn is subjected to the yarn end treatment.

When using the wound body which has been subjected to the yarn end treatment, the yarn end YE is pulled and unwound. In the case of a filament yarn, as already described, the entanglement of the wound yarn end YE is unraveled by pulling the yarn end YE, or the partially entangled filament f is broken and unwound. In the case of spun yarn, the fluff h that has been caught can be broken by pulling and easily unwound.

Next, a specific example in which the yarn end treating apparatus of the present invention is mounted on a take-up winder 10 as a winding machine will be described with reference to FIGS. 9 to 12.

The take-up winder 10 shown in FIGS. 9 and 10 is called a turret type, and is a type in which the full bobbin 11 and the empty bobbin 11 are automatically switched. A body frame 13 provided on the base frame 12 is provided with a lift box 14 that can be lifted and lowered, a rotatable turret plate 15, and a fixed frame 17 having an operation box 16 at its tip. A touch roller 14a and a traverse device 14b are respectively supported on the elevating box 14, and the touch roller 14a is in pressure contact with the thread layer of the bobbin 11 mounted on the spindle 18 at the winding position. The turret plate 15 is rotatably supported by a driving device (not shown) about a rotation shaft. The turret plate 15 rotatably supports two spindles 18 and 18 so that when one spindle 18 is in a winding position, the other spindle 18 is in a standby position. is there. Both spindles 18, 18 are independently driven by a motor M. The empty bobbin 11 in which the yarn end YE of the fully wound package P in the standby position is in the winding position
The swirling separator 19 is swingably supported around the shaft 19a in order to prevent the swirling separator 19 from being caught in the shaft b. Further, a thread hooking device 20 is attached to a lever 20b that swings around a shaft 20a in order to manually thread the thread before starting continuous operation.

The bobbin 11 (eight in this example) mounted on the spindle 18 at the winding position is made to wind the yarn, and the turret plate 115 is rotated 180 times each time the bobbin 11 is fully wound.
In order to ship the package P, which has been fully wound, is pushed by the pusher 21 and taken out from the spindle 18, and is then shipped as a product, for example, by a transfer robot or the like. Will be transported to the packaging area. In this way, the bobbin 1 in which the continuously supplied yarns are mounted on the two spindles 18
Take up alternately with 1.

In the above structure, FIG. 11 and FIG.
As shown in the drawing, the yarn end processing devices 1 according to the present invention are arranged in a space surrounded by the base frame 12 in a number corresponding to the number of bobbins 11. This yarn end processing device 1 is
When the bobbin is replaced by rotating the turret plate 15, the opening 1a of the suction nozzle 1A is switched between a working position facing the package P side and a standby position facing in the opposite direction so that the suction nozzle 1A does not interfere with the full package P. For freedom, it is supported by a bracket 23 rotatable about an axis 22 parallel to the spindle 18. The motor 1m provided on the fixed frame 17 side rotates the bracket 23 for switching.

The winding of the yarn by the winder 10 proceeds while the yarn end processing device 1 is in the standby position. When the bobbin 11 is fully wound, the turret plate 15 is rotated 180 degrees as described above.
The bobbin is exchanged between the full bobbin and the empty bobbin by rotating the bobbin completely, and the unwound traverse SW portion is applied to the outer circumference of the full package P over a predetermined length in association with the yarn passing action from the full bobbin to the empty bobbin. When the bobbin replacement is completed, the yarn end processing device 1 receives it and swings to the operating position, and the solenoid valve V is opened to prepare for suction and twisting. Almost at the same time, the full package P side is gently rotated in the clockwise direction opposite to the winding direction by driving the motor M.
Details of the yarn end processing by the reverse rotation are as described in FIG. When the yarn end processing is completed, the rotation is stopped when the rotation is reversed about 2 to 3 times, the rotation is stopped, the yarn end processing device 1 is returned to the standby position side, and the full package P after the yarn end processing is completed is taken out from the spindle 18 and carried out. To do.

In the above embodiment, the yarn end treating apparatus 1 having the suction nozzle 1A and the twisting nozzle 1B has been described. However, if the nozzle 1B has a twisting amount enough to capture the yarn end YE existing on the surface layer of the wound body and the tension necessary to propagate the twist to the upstream can be given to the yarn end YE, the twisting is performed. The yarn end processing device 1 can be configured with only the hanging nozzle 1B. Further, the distance between the position of the tip opening 1a of the suction nozzle 1A and the surface of the package P may be adjusted. A sensor may be provided in the middle of the air flow path of the suction nozzle 1A to detect that the end yarn has been captured, and the detection of this sensor may be used as a trigger for opening the solenoid valve V of the twisting nozzle or stopping the reverse rotation. . It is also possible to use only the variable diaphragm C that sets the twisting force. The twisting force of the air flow of the twisting nozzle 1B is preferably about 300,000 twists / minute as in the above embodiment, but the above-described action is achieved even in the range of about 100,000 to 400,000 twists / minute rotation. it can.
In the case of spun yarn, it may be slightly lower. Further, although the cheese-shaped package P has been described as an example of the wound body in the above-described embodiment, the present invention may be applied to the yarn end treatment of various wound bodies such as a pan-shaped winding bobbin. The means for twisting the yarn end is not limited to the nozzle described in the embodiment, but may be another twisting device such as a belt type nip twister.

[0030]

According to the first aspect of the present invention, only by rotating the wound body in the direction opposite to the winding direction, the yarn end is captured, the yarn end is fixed to the surface layer of the wound body, and the captured yarn end. Since the pulling out of the yarns is automatically performed in order, the yarn end treatment operation is extremely easy,
An automatic machine adopting the yarn end processing method can be easily constructed.

When the wound body is rod-wound before the yarn end treatment as in the second aspect of the present invention, the yarn end entangles the filament of the rod-wound portion, resulting in breakage of a single yarn. However, it suffices to unwind only the part wound around the waste thread.

When the yarn end treating device is incorporated in the winding machine as in the third aspect of the invention, the yarn end treatment can be performed immediately after the winding is completed, and the obstacle due to the natural unwinding of the yarn end is completely eliminated. It can be lost in Moreover, since the yarn end processing device is composed of a pneumatic nozzle having no moving part, the overall structure is simple.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a yarn end processing device for a package according to the present invention.

2 (a) to (e) are schematic diagrams for explaining the yarn end treatment method of the present invention.

FIG. 3 is an enlarged plan view of an essential part for explaining the operation of the present invention.

FIG. 4 is an enlarged plan view of an essential part showing a mode after yarn end processing according to the present invention.

FIG. 5 is an enlarged plan view of a main part showing another embodiment after the yarn end processing according to the present invention.

FIG. 6 is an enlarged plan view of an essential part showing one mode after the processing when the yarn end processing of the spun yarn is performed by the yarn end processing method according to the present invention.

FIG. 7 is a vertical cross-sectional view of a twisting nozzle as a yarn end treatment device according to the present invention.

FIG. 8 is a cross-sectional view of essential parts of a twisting nozzle as a yarn end treating device according to the present invention.

FIG. 9 is a front view showing the winder.

FIG. 10 is a side view showing the winder.

FIG. 11 is a front view of a main part of the winding machine of the present invention.

FIG. 12 is a plan view of an essential part corresponding to FIG.

[Explanation of symbols]

 1 yarn end processing device 1A suction nozzle 1a suction nozzle tip opening 1B twisting nozzle 1b yarn introduction port 1d exhaust port 2 pump C variable throttle f filament h fluff L fixed range M spindle drive motor P package V solenoid valve YE yarn end Ye yarn End tip

Claims (3)

[Claims] 1. A yarn end process for rotating a wound yarn body in a direction opposite to a winding direction to capture a yarn end of the wound yarn body and continuing the reversal by a predetermined amount while imparting twist to the captured yarn end. Method. 2. The yarn end treatment method according to claim 1,
A yarn end treatment method in which the surface layer of a wound body is wound with a bar before performing the yarn end treatment. 3. A winding machine provided with a yarn end processing device comprising a nozzle for sucking a yarn end of a wound yarn body and a twisting nozzle for imparting strong twist to the sucked yarn end by a swirling flow.