JP2933201B2 - Fluff control device in automatic winder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for suppressing the generation of fluff when a spun yarn is rewound in an automatic one-ider.

[0002]

2. Description of the Related Art Soft and cross-welded soft and
The applicant has been developing an automatic winder having a device for twisting a spun yarn with two hollow nip rollers and for fuzzing the spun yarn. This automatic winder is equipped with an inverter on the motor side that drives the traverse drum for winding and winding the yarn, and adjusts the rotation speed of the traverse drum to the yarn speed sent by the nip roller driven by another motor. In addition, yarn breakage due to a change in yarn tension is prevented.

[0003]

In the above automatic winder, installation of an inverter causes an increase in cost. In addition, at the beginning of operation due to thread breakage or the like, the traverse drum driving motor and the nip roller driving motor do not synchronize, so after the traverse drum starts rotating, it takes 5 to 7 seconds until it reaches a steady speed. Each nip roller is separated to make it inoperative. For this reason, the length of the yarn that advances without being fluffed reaches 10 to 20 m. Furthermore, at the beginning of operation when the motors are not synchronized, the traverse drum driving motor cannot be changed in speed, so that the ribbon breaker cannot be operated.

An object of the present invention is to enable the rotation speed of the nip roller to be synchronized with or freely changed to the rotation speed of the traverse drum.

[0005]

According to the present invention, there is provided an automatic winder comprising a pair of nip rollers provided on a yarn path and a nip between the nip rollers for suppressing the fluff by winding. The nip roller is driven via a rotational force transmitting mechanism provided between the package driving drum and the nip roller and transmitting a rotational speed according to the yarn tension.

[0006] The rotational force transmitting mechanism includes a pulley capable of changing the position, a belt stretched between the pulley and the pulley of the driving drum, a speed change pulley mounted on the nip roller and capable of changing the working radius. The pulley is constituted by a belt stretched between the pulley and the position-changeable pulley, and the operation radius is changed by changing the position of the position-changeable pulley.

[0007] A position-changeable pulley is supported at the other end of a swinging lever having an intermediate portion rotatably supported by a base shaft and a notch formed at one end, and a thread tension is applied to the notch. And an eccentric pin provided eccentrically to the axis of the dial that rotates in conjunction with.

[0008]

In the fluff suppressing device in the automatic winder configured as described above, when the dial rotates according to the thread tension and the pin rotates around the axis, the swing lever rotates around the base axis, The position of the position changeable pulley changes. Then, the working radius of the speed change pulley changes, and the speed of the belt stretched between the speed change pulley and the position changeable pulley changes. Therefore, the rotation speed of the nip roller is changed according to the tension of the yarn traveling by the winding package driving drum.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fluff suppressing device in an automatic winder according to the present invention will be described with reference to FIGS.

The fluff suppressing device is an automatic winder shown in FIG. 1, that is, a yarn feeding package 1 on which a spun yarn is wound.
Between the slab catcher 3 and the tensor 6 in the automatic winder which winds up the yarn Y from the winding package 8 through the balloon breaker (not shown), the tensor 2, the slab catcher 3, the tensor 6, and the traverse drum 7 in this order. And two nip rollers 5 and its rotational force transmission mechanism.

Each of the nip rollers 5 is the same as that under development described above, and is a hollow member made of soft rubber or the like. These are pressed against each other during operation with the rotating shafts crossing each other. The yarn Y is passed through the nip portion of each nip roller 5 at 45 degrees to each rotation axis.

The rotation shaft 11 of the lower nip roller 5 is
As will be described later, the nip roller is driven from a nip roller drive shaft 12 that is driven to be depolarized (having no nip roller drive motor as in the past) via a pulley 13, a belt 14, and a pulley 15, and the upper nip roller 5 Further, it is driven from the rotating shaft 11 via a belt 16 and a pulley 17.

When the upper and lower nip rollers 5 rotate, the spun yarn Y is false-twisted and the fluff is twisted, so that the spun yarn Y is turned down, and at the same time, a feed force is applied.

Next, with reference to FIG. 3 to FIG. 5, a mechanism for transmitting the rotational force of the nip roller 5 will be described.

The nip roller drive shaft 12 is supported on a frame F of an automatic winder via a bearing 18.
A fixed portion 19a constituting the speed change pulley 19 is fixed to an end of the drive shaft 12. Further, the other sliding portion 19 constituting the speed change pulley 19 is attached to the drive shaft 12.
b is inserted and is pressed against the fixed portion 19a by the coil spring 20. The speed change pulley 19 exists on the back side of the frame F, and the nip roller 5 and the like exist on the front side.

A fixed portion 19a constituting the speed change pulley 19
The thickness of each of the opposing surfaces of the sliding portion 19b decreases linearly toward the opposite surface toward the circumference from the center. Therefore, between the fixed portion 19a and the sliding portion 19b,
A V-shaped gap is formed and serves as a guide groove for the trapezoidal belt 27 described later.

A base shaft 21 is fixed to the frame F above the nip roller drive shaft 12, and an intermediate portion of a swing lever 22 is rotatably supported on the base shaft 21. .

A shaft 23 protrudes from one end of the swing lever 22, and a position-changeable pulley 24 is mounted on the shaft 23.
Are rotatably supported via bearings 25. The pulley 24 has a trapezoidal belt 26 extending between the transmission pulley 19 and a round belt 27 extending between a pulley (not shown) fixed to the shaft of the traverse drum 7.
Are provided side by side on the periphery.

The other end of the swing lever 22 has a notch 21a with which a pin 30 of a dial 29 described below is engaged.
Are formed (see FIG. 4).

A dial shaft 28 is rotatably supported on the frame F at a position between the nip roller drive shaft 12 and the base shaft 21. A dial 29 is fixed to the dial shaft 28. Further, an eccentric pin 30 eccentric from the shaft center is protruded from the shaft end of the dial shaft 28 in the axial direction.

In the fluff suppressing device of the automatic winder configured as described above, when the dial 29 is turned according to the magnitude of the tension of the traveling yarn Y and the eccentric pin 30 is rotated around the axis of the dial shaft 28, the swing The moving lever 22 rotates around the base shaft 21, and the position-changeable pulley 24 is displaced up or down with respect to the speed change pulley 19. Due to the displacement of the pulley 24, the trapezoidal belt 26 is tensioned or relaxed. As a result, the sliding portion 19b is pressed by the trapezoidal belt 26, or the pressure is released and the sliding portion 19b is separated from the fixed portion 19a or returns to the fixed portion 19a side, and the action radius of the trapezoidal belt 26 to the speed change pulley 19 increases or decreases. . Therefore, the speed of the trapezoidal belt 26 increases or decreases. Therefore, by rotating the dial shaft 28 according to the yarn tension of the traveling yarn Y, the rotation speed of the nip roller 5 is changed.

The above-mentioned rotation operation of the dial 29 is performed by touching the tension of the traveling yarn Y with the hand and visually checking the operation. However, the operation can be linked with the tension of the traveling yarn Y.

That is, as shown in FIG. 5, an L-shaped sensor lever 31 is fixed to the dial 29, and its free end is placed on the running yarn Y between the nip roller 5 and the tensor 6. , And the traveling lever Y
The spring that urges the dial lightly against the dial 29
By being provided inside, it can be linked.

Alternatively, the tension of the traveling yarn Y may be measured by an electric sensor or the like, and the dial 29 may be rotated by a step motor or manually according to the result.

[0025]

Since the present invention is configured as described above, it has the following effects.

That is, the rotational speed of the nip roller can be tuned or freely changed to the rotational speed of the take-up package driving drum without using an expensive inverter or the like. In particular, when the rotation operation of the dial is linked to the yarn tension, the yarn can always be run with an appropriate tension. Further, a driving source for the nip roller is not required.

[Brief description of the drawings]

FIG. 1 is a perspective view of an automatic winder incorporating a fluff suppressing device of the present invention.

FIG. 2 is a perspective view of a nip roller constituting the fluff suppressing device of the present invention.

FIG. 3 is a cross-sectional view of a rotational force transmission mechanism constituting the fluff suppressing device of the present invention, as viewed from the front.

FIG. 4 is a side view of a main member of a rotational force transmission mechanism constituting the fluff suppressing device of the present invention.

FIG. 5 is a perspective view showing a relationship between a thread, a dial, and a sensor lever.

[Explanation of symbols]

 Reference Signs List 5 nip roller 7 traverse drum 12 nip roller drive shaft 19 speed change pulley 21 base shaft 22 swing lever 22a notch 24 position changeable pulley 26 trapezoidal belt 27 round belt 28 dial shaft 29 dial 30 eccentric pin 31 sensor lever

Claims (3)

(57) [Claims] 1. An automatic winder having a pair of nip rollers provided in a yarn path and nipping the yarn between the nip rollers to suppress fluff , a yarn provided between a take-up package driving drum and a nip roller. Rotation according to tension
A hair-tone suppressing device in an automatic winder that drives a nip roller via a rotational force transmitting mechanism that transmits speed . 2. A pulley having a position changeable, a belt stretched between the pulley and a pulley of a driving drum,
A speed change pulley attached to the nip roller and capable of changing the action radius, and a belt stretched between the pulley and the position changeable pulley constitute a rotational force transmission mechanism, and the action radius can be changed in position. The fluff suppressing device in the automatic winder according to claim 1, wherein the device is changed by changing a position of the pulley. 3. A pulley whose position can be changed is supported at the other end of a swinging lever having an intermediate portion rotatably supported by a base shaft and a notch formed at one end. 3. The fluff suppressing device for an automatic winder according to claim 2, wherein an eccentric pin provided eccentrically on an axis of the dial that rotates in conjunction with the engagement is engaged.