JPH058939A - Extension assist device for automatic winder - Google Patents

Abstract

PURPOSE:To suppress generation of thread breakage or the like at the time of ending winding so that coping with high speed rewinding can be attained by providing the first balloon restricting member of lowering down a restricting position with extension of a feed thread bobbin and the second balloon restricting member having a contraction arranged in the vicinity of a bobbin top part. CONSTITUTION:The second balloon restricting member 36 is a cylindrical body of small diameter with the upper end fixed to a mouth port 20 or the like to position a contraction 36a, provided in the lower end, in an almost fixed distance L2 from a top part of a bobbin 8, and this distance L2 is set to a range of suppressing a rise of winding end tension by reducing a contracting effect with the periphery of the top part of the bobbin 8 not in contact with a running thread. The first balloon restricting member 35 is a cylindrical body of large diameter extendable/contractable to store the second balloon restricting member 36 in the inside, and a lift bed 24 is mounted to a suitable part of the member 35 and constituted so that the bed can be lowered down with extension of a feed thread bobbin. A thread Y, drawn up while a balloon is restricted by the first balloon restricting member 35, becomes a stable small balloon via the contraction 36a to reach the upper mouth port 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unwinding assisting device for controlling a balloon to prevent yarn breakage, which is used, for example, when a yarn feeding bobbin produced by a ring spinning machine is rewound by an automatic winder.

[0002]

2. Description of the Related Art In an automatic winder, a large number of winding units are arranged in parallel, and the equipment arrangement of one of the winding units will be described with reference to FIG. Winding unit 1
Is rotatably supported by a support shaft 3 of a side frame 2, and the unit 1 is also mounted on a suction pipe 4 and appropriately fixed during operation of the automatic winder. The winding unit 1 has a yarn supplying bobbin supplying device 5 at the lower part.
The bobbin supplying device 5 has an inclination toward the front surface of the machine base, receives a new yarn supplying bobbin 7 from a bobbin supplying conveyor 6 provided on the rear surface of the machine base, and a yarn of a yarn supplying bobbin 13 appropriately positioned at a winding position. Is wound on the package P, and the core tube 8 after the winding is completed is discharged to the bobbin discharging conveyor 9.
The yarn supplying bobbins 7 and 13 and the bobbin 8 are inserted into a tray 10 and conveyed. This tray 10 is a disk-shaped base 1
A peg 12 protruding from the center of the base 1 is formed, and the peg 12 is formed with an air flow passage that extends to the upper passage and extends to the lower surface of the pedestal 11. A winding position is formed at an appropriate position of the bobbin supplying device 5, and the yarn of the yarn supplying bobbin 13 is unwound and pulled out and wound into the package P at the position. A compressed air conduit connected to a pressure source (not shown) is provided below the bobbin supply device 5 for the yarn supplying bobbin 13 at the winding position, and a compressed air injection nozzle 14 is positioned at the tip of this compressed air conduit to face the internal passage of the tray 10. .. The yarn end 15 of the new yarn feeding bobbin 7 is inserted into the bobbin center hole. Above the yarn supplying bobbin 13 at the winding position, a balloon breaker 16 formed of a cylinder on the same axis as the yarn supplying bobbin 13 and having upper and lower ends opened is fixedly installed on the winding unit 1 by a supporting member (not shown). There is. Reference numeral 17 is a relay pipe, which is supported so as to be rotatable around a hollow shaft 18. The tip thereof is the suction opening 19 of the yarn end 15, the hollow shaft 18 is connected to a suction device (not shown), the relay pipe 17 is swung, and the suction opening 18 approaches the top of the new yarn feeding bobbin 7 in the winding position. When it does, it is designed to perform a suction action. 30 is a yarn splicing device, 3
1 is a suction mouth that sucks the end of the package.
32 is a slab catcher and 33 is a traverse drum.

In the winding unit 1 described above, as shown in the figure, the balloon 16a of the yarn unwound from the yarn supplying bobbin 13 is restricted by the balloon breaker 16. Then, it is wound into the package P via the slab catcher 32 and the traverse drum 33. The balloon breaker 16 is restricted to an appropriate one so that the balloon 16a does not spread too much, so that the yarn feeding bobbin 13 does not break. However, since the balloon breaker 16 is fixed to the machine base, as the unwinding of the yarn supplying bobbin 13 progresses, the chess 13a, which is the unwinding portion of the yarn, moves from the balloon breaker 1 to the balloon breaker 1.
6 The distance L to the lower end becomes longer, and the balloon breaker 16
Work worsens. As a result, yarn breakage may occur near the end of the unwinding of the yarn supplying bobbin 13.

Japanese Unexamined Patent Publication (Kokai) No. 61-1783 discloses an unwinding assisting device for dealing with yarn breakage at the end of unwinding.
The one disclosed in Japanese Patent Publication No. 73 is known. The unwinding assisting device 21 will be described with reference to FIG. A rotary screw shaft 22 is erected on the side of the yarn supplying bobbin 13 and the balloon breaker 16 at the winding position, and the rotary screw shaft 22 is rotated by a motor 23 such as a pulse motor fixed to the upper support plate 2a. It is like this. An elevating table 24 is screwed into the rotary screw shaft 22, and a guide shaft 2 erected parallel to the rotary screw shaft 22 in a through hole 24 a formed in the elevating table 24.
5 is fitted. With such a structure, the elevating table 24 moves up and down as the rotary screw shaft 22 rotates. Further, a balloon breaker 16 fitted from above the core tube 8 is attached to the lift table 24. A sensor mounting plate 26 is provided on the lift table 24 so that the vertical position thereof can be adjusted, and a sensor such as a photoelectric sensor for detecting the upper end of the chess (oblique portion) 13a of the yarn feeding bobbin 13 is provided on the sensor mounting plate 26. 27 is provided, and the motor 23 is controlled by the signal of the sensor 27. That is, the balloon breaker 16 is a chess 1
The sensor 27 drives the motor 23 to lower the elevating table 24 so that it is located at a predetermined position above 3a.

In the unwinding assisting device 21 described above, the balloon breaker 16 descends together with the unwinding of the yarn, and the distance L1 from the lower end of the balloon breaker 16 to the chess 13a maintains an appropriate value. Therefore, even near the end of winding, the balloon is kept in a restricted state and yarn breakage or the like is prevented.

[0006]

In the unwinding assisting device of FIG. 6 described in the prior art, as shown in FIG. 5 (a), the amplitude and average value of the unwinding tension are 1 from the beginning of winding. / 2
Until then, it didn't change much. However, the amplitude and the average value gradually start to increase from around 1/2. Then, when it exceeds 3/4, the amplitude and the average value rapidly increase. in this way,
The large fluctuations in the amplitude and the average value of the unwinding tension mean that the balloon is not sufficiently restricted.
That is, there is a problem that the balloon breaker that descends is not sufficient to limit the balloon at the end of winding.

The present invention was created by experimentally pursuing the cause of such problems of the prior art, and its purpose is to unwind using a descending balloon breaker. It is an object of the present invention to provide an auxiliary device that surely limits the balloon near the end of winding.

[0008]

In order to achieve the above object, an unwinding assisting device for an automatic winder according to the present invention includes a first balloon restricting member whose restricting position is lowered together with unwinding of a yarn feeding bobbin, and a bobbin top. And a second balloon regulating member having a diaphragm arranged in proximity.

[0009]

The first balloon regulating member regulates the balloon in the unwinding portion, and the second balloon regulating member stabilizes the upper balloon.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the main parts and operation of the unwinding device of the present invention.

In FIG. 1, the point different from FIG. 7 is the configuration of the balloon regulating member. The balloon regulating member of the present invention,
First balloon regulating member 35 and second balloon regulating member 3
It consists of 6.

The second balloon regulating member 36 is a small-diameter cylindrical body, the upper end of which is fixed to the base 20 and the like, and the lower end of which is the diaphragm 3.
6a is provided. The diaphragm 36a is located at a substantially constant distance L2 from the top of the bobbin 8. This distance L2
Is set in a range in which the effect of the squeezing is reduced to suppress the increase in tension at the end of winding, and the outer circumference of the top of the bobbin does not come into contact with the running yarn. That is, if it is too large, the effect of drawing is reduced, and if it is too small, the running yarn contacts the outer circumference of the top of the bobbin. Specifically, it is preferably set in the range of 10 to 100 mm. The first balloon restricting member 35 is a large-diameter cylindrical body, the second balloon restricting member 36 can be housed inside, and it can expand and contract in a two-step telescope shape. The elevating table 24 of FIG. 7 is attached to an appropriate place of the first balloon regulating member 35 so that it can be lowered together with the unwinding of the yarn feeding bobbin, but the position of the diaphragm 36a of the second balloon regulating member 36 does not change. .. That is, the yarn Y that is pulled up while the balloon is regulated by the first balloon regulating member 35 passes through the squeeze 36 b of the second balloon regulating member 36 to become a stable small balloon and reaches the upper mouth hole 20.

FIG. 2 is a view showing an example of a combination of a first balloon regulating member and a second balloon regulating member suitable for a long bobbin. The second balloon restricting member 37 is a cylindrical body having a smaller diameter than that of FIG. 1, and has a diaphragm 37a located at a substantially constant distance L2 from the top of the bobbin 8. The first balloon restricting member 38 includes a medium diameter tubular body 39 and a large diameter tubular body 40. The second balloon restricting member 37 can be housed in the medium-diameter tubular body 39, the medium-diameter tubular body 39 can be housed in the large-diameter tubular body 40, and can be expanded and contracted in a three-step telescope shape. Also,
A ring 40a having the same diameter as the inner diameter of the medium diameter tubular body 39 is provided at the lower end of the large diameter tubular body 40 so that the balloon from the yarn supplying bobbin 13 does not spread too much. The elevating table 24 of FIG. 7 is attached to the proper position of the large-diameter cylindrical body 40 so that it can be lowered together with the unwinding of the yarn feeding bobbin, but the position of the diaphragm 37a of the second balloon regulating member 37 does not change. The three-stage telescope-like one is suitable for the long bobbin shown in the figure because the length when shortened becomes short.

Next, the operation of the above-described unwinding assisting device will be described with reference to FIG. 1 showing a state near the end of winding. In the case of the conventional balloon guide shown in FIG.
The thread A unwound from the lower end of the chess 13a of No. 3 is the cylindrical body 1
After exiting from No. 6, the balloon becomes a shape A before reaching the mouth hole 20. Further, the unwinding tension of the yarn unwound from the lower end of the chess 13a becomes high. On the other hand, the yarn B unwound from the upper end of the chess 13a becomes a balloon of shape B before it reaches the mouth hole 20 after exiting from the tubular body 16. Further, the unwinding tension of the yarn unwound from the upper end of the chess 13a becomes low. The balloons of shape A and shape B are generated alternately. This state is
As a result, it becomes remarkable as the winding end of the yarn supplying bobbin 13 is approached. As a result, as shown in FIG. 5B, the amplitude and the average value of the unwinding tension sharply increase from around 3/4 from the winding start. .. However, in FIG. 1 in which the first balloon restricting member 35 and the second balloon restricting member 36 are combined, the yarn A unwound from the lower end of the chess 13a and the yarn B unwound from the upper end of the chess 13a are also Second balloon restriction member 36
There is no such difference in the balloon shape after exiting the aperture 36a. As a result, as shown in FIG. 5 (a), the amplitude and the average value of the unwinding tension gradually increase from around 3/4 from the beginning of winding, but are significantly larger than those in FIG. 5 (b). You can see that it has been improved.

FIG. 3 is a perspective view showing another embodiment of the second balloon regulating member. The first balloon regulating member 41 is provided with a long hole 43. This first balloon regulating member 4
A disk-shaped second balloon restricting member 42 having a diaphragm 42a is loosely inserted in the first unit 1 and is fixed to a proper position of the winding unit by a support rod 44 protruding from the long hole 43. Thus, although the second balloon regulating member has at least the diaphragm, it does not have to be a tubular body.

FIG. 4 is a perspective view showing another embodiment of the first balun regulating member. A large number of opening / closing rings 45, each having a semicircular ring attached to the tips of a pair of turning arms, are arranged in the vertical direction.
The opening and closing ring 45 is closed in sequence as a is lowered. As described above, the first Barun regulating member does not necessarily have to be a descending tubular body.

[0017]

The unwinding assisting device for the automatic winder according to the present invention comprises the first balloon restricting member that descends together with the unwinding of the yarn supplying bobbin, and the second balloon restricting member having the throttle disposed near the top of the bobbin. It is to have, first
Since the balloon regulating member regulates the balloon at the time of unwinding, and the second balloon regulating member stabilizes the upper balloon, the synergistic effect of the first and second balloon regulating members causes the yarn breakage at the end of winding. It is possible to suppress high-speed winding and cope with high-speed winding.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part and an operation of an unwinding assisting device of the present invention.

FIG. 2 is a cross-sectional view showing another combination example of the first balloon regulating member and the second balloon regulating member.

FIG. 3 is a perspective view showing another embodiment of the second balloon regulating member.

FIG. 4 is a perspective view showing another embodiment of the first balloon regulating member.

FIG. 5 is a graph showing changes in unwinding tension with time.

FIG. 6 is a device layout diagram of a winding unit.

FIG. 7 is a diagram showing a conventional unwinding assisting device.

FIG. 8 is an operation diagram of a conventional unwinding assisting device.

[Explanation of symbols]

 8 bobbin 13 yarn feeding bobbin 35, 37, 41 first balloon regulating member 36, 38, 42 second balloon regulating member 36a, 38a, 42a throttle

Claims (1)

Claim: What is claimed is: 1. A first balloon restricting member whose restricting position is lowered together with the unwinding of the yarn supplying bobbin, and a second balloon restricting member having a diaphragm disposed near the top of the bobbin. Unwinding assist device for automatic winder.