JPS6114062B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn winding device, and more particularly to a yarn winding device that winds yarn continuously supplied at a constant speed into a pirn shape at a predetermined constant tension. Regarding.

For example, a yarn winding device that winds yarn that is continuously supplied at a constant speed is disclosed in U.S. Patent No.
The one described in the specification of No. 3931938 is known.

This yarn winding device is provided with a force transducer that is periodically vibrated by a vibrator in a direction perpendicular to the running direction of the yarn, between the yarn supply roller and the traverse fulcrum guide. This force transducer is brought into contact with the running thread intermittently to detect the tension of the thread. The force transducer has a strain gauge, and the strain in the strain gauge that occurs when the force transducer contacts the yarn is extracted as a tension signal. The yarn winding speed is controlled so that the magnitude of the tension signal is approximately constant.

However, in such conventional yarn winding devices, since the force transducer, which is a tension detector, is actively vibrated by a vibrator, distortion of the strain gauge due to this vibration is superimposed on the tension signal as noise. However, there is a drawback that it is difficult to detect the tension of the yarn with high precision, in other words, it is difficult to wind the yarn with a constant tension with high precision. Another drawback was that the lead wires of the strain gauge were easily damaged by vibration, and the life of the force transducer, which was a tension detector, was short.

Also, in the above-mentioned US Patent No. 3931938,
As a yarn winding device that winds the yarn in a so-called cheese shape with no taper on the end surface, the yarn during traverse movement is installed in the traverse space between the yarn traverse fulcrum guide and the traverse mechanism. A yarn winding device is described in which a force transducer is provided so that the yarn is intermittently in contact. The yarn winding speed is controlled so that the magnitude of the tension signal obtained from the force transducer is approximately constant.

This yarn winding device attempts to control the winding speed by detecting tension using the traversing motion of the yarn. However, in such conventional technology, the traverse device 15 of the winder used
Generally, as the winding diameter of the thread 18 wound around the spindle 22 increases, it moves toward the traversing fulcrum guide 11 side. 13
The contact angle of the yarn Y in contact with the yarn Y increases. Therefore, if the tension of the thread is constant, the tension signal of the force transducer 12 will increase as the winding diameter of the thread increases. Since the tension signal is controlled to be constant, as the winding diameter of the yarn increases, the tension of the yarn decreases, which has the disadvantage that a predetermined tension cannot be maintained. Was.

Further, since the yarn is wound while being traversed, the winding tension of the yarn is low near the center of the traverse and highest at both ends of the traverse. Then, the tension of the yarn is detected by the detection guide 1 of the force transducer 12 at both ends where the winding tension is highest.
Since the method involves bringing the yarn into contact with the detection guides 3 and 14, the yarn has the disadvantage that the portion of the yarn that comes into contact with the detection guide is squeezed and the quality of the yarn is periodically damaged.

On the other hand, JP-A-50-89646 discloses a yarn winding device for winding yarn into a pirn shape, in which a dancer arm type tension detector is provided between a yarn supply roller and a winding mechanism. A yarn winding device is described in which the yarn winding speed is controlled based on a tension signal obtained from this tension detector.

However, such conventional yarn winding devices
Since the yarn is run with a large bend by the dancer arm, the yarn is easily strained and damaged.
Therefore, it is not suitable for high-speed winding. Furthermore, since the tension loss in the tension detector is extremely large, there is also the drawback that low tension winding is difficult.

The purpose of the present invention is to solve the above-mentioned drawbacks of the conventional yarn winding device, and to maintain the yarn tension at a predetermined constant tension with high precision, at high speed, and without causing almost any damage to the yarn. An object of the present invention is to provide a yarn winding device capable of winding a yarn.

In order to achieve the above object, the present invention is capable of tapering both ends of a package by sequentially decreasing the winding width as the winding diameter increases, using yarn that is continuously supplied at a constant speed and under a predetermined constant tension. This yarn winding device includes a spindle drive type winding machine, a traverse fulcrum guide provided on the yarn feeding side of the winding machine, and a traverse fulcrum guide provided on the yarn feeding side of the winding machine. A tension detector is provided on the yarn feeding side of the guide and in an area where the yarn travels in a substantially straight line, and is of a type that generates a signal proportional to the tension based on the pressure of the yarn in contact with the yarn; a swinging guide that swings periodically to bring the yarn into intermittently contact with the tension detector; and a control that controls the rotational speed of the winding spindle of the winding machine in response to a signal from the tension detector. It has a vessel,
The yarn winding device is characterized in that the tension of the yarn oscillated by the oscillating guide is intermittently detected by the tension detector.

To explain one embodiment of the present invention, in FIG. 1 (schematic front view) and FIG. 2 (side view of essential parts in FIG. A pair of Godet rollers 3 are provided only for the yarn 2A, and are provided to prevent the yarn 2A from shaking.
4 is a rotating guide (swinging guide) that periodically swings the running thread 2A; 6 is a rotating guide when the thread 2A periodically swings by the rotating guide 4 contacts the detection guide 5; , is a tension detector that generates a tension signal corresponding to the tension of the yarn 2A.

The rotating guide 4 is rotated by a motor 9 in the direction of the arrow, that is, in the same direction as the running direction of the yarn 2A, and as shown in FIG. It is designed so that it can be swung.

10A and 10B are winding spindles, and on these winding spindles 10A and 10B are packages tapered at both ends, that is, pirns 12A and 12A, 12A and 12A, 12A and 10B, in which the winding width gradually decreases as the winding diameter increases.
2B is being formed. 11 is a motor that drives the take-up spindles 10A and 10B. That is, this winder is of a spindle drive type.
The take-up spindles 10A, 10B and the motor 11 are mounted on a slide base (not shown), and are reciprocated in the direction of the arrow by known means. The width of this reciprocating motion is
As the winding of A and 2B progresses, the winding spindle 10 decreases sequentially.
As mentioned above, on A and 10B, there are pirns 12A and 12A, in which the winding width gradually decreases as the winding diameter increases.
12B can be obtained. That is, yarn 2
Relatively speaking, A and 2B are performing a traversing motion in which the winding width sequentially decreases as the winding diameter increases. 8A and 8B are traverse fulcrum guides that serve as fulcrums for this traverse motion.

13 is a controller. This controller 13 is connected between the tension detector 6 and the motor 11,
A tension setter 14 that generates a predetermined winding tension for the yarns 2A and 2B, and electric power that supplies control power to the motor 11 and controls the rotational speed of the winding spindles 10A and 10B driven by the motor 11. It has a controller 15.

Next, the operation of such a yarn winding device will be explained.
B passes through the traverse fulcrum guides 8A and 8B and is wound onto the winding spindles 10A and 10B while being traversed, but on the yarn feeding side of one of the traverse fulcrum guides 8A, there is a rotating guide provided there. When the blade 7 of 4 is at the position shown by the solid line, the thread 2A is pushed as shown by the solid line, and when the blade 7 is rotated 90 degrees and is at the position shown by the dotted line, the thread 2A becomes straight as shown by the dotted line, and the thread 2A is pushed as shown by the dotted line. As the thread 2A rotates, the thread 2A is swung. When the thread 2A is swung in this manner, the thread 2A comes into contact with the detection guide 5 of the tension detector 6 intermittently as the thread 2A swings, so that the pressure of this contact causes the tension sensor to 6 is yarn 2A
generates a tension signal corresponding to the tension of This tension signal is compared with a reference signal by the tension setting device 14, and the power controller 15 generates control power based on the difference signal, and this control power is supplied to the motor 11 to rotate the take-up spindles 10A and 10B. The speed is controlled all at once, and the yarns 2A and 2B are wound with a predetermined constant tension.

In this embodiment, two take-up spindles 10A, 10B are driven by a common motor 1.
1. The tension detector 6 detects the yarn 2A supplied to the take-up spindle 10A.
only for the other winding spindle 10
It is not provided for the yarn 2B supplied to yarn B. In other words, when there are multiple take-up spindles whose rotational speeds are controlled in response to a signal from one tension detector, the tension of one of the multiple yarns wound on the multiple take-up spindles is detected. This makes it possible to wind other yarns whose tension is not detected at the same time and under substantially the same conditions. The reason why the tension detector used in the present invention is able to wind the yarn whose tension is detected by installing a tension detector under almost the same conditions as the yarn whose tension is not detected is as follows.
This is because almost no tension loss is caused to the running yarn.

In the above embodiment, an example was described in which the tension detector was provided on the yarn feeding side of the rotating guide, but the positions of the tension detector and the rotating guide may be reversed.

In addition, although the description has been made of a motor whose rotational speed is controlled by directly receiving electric power from a controller, the motor of the yarn winding device of the present invention may be a variable speed motor such as an eddy current joint or a mechanical continuously variable transmission. When such a motor is used, the power from the controller is used to control the excitation current of the eddy current joint or the pilot motor that changes the speed change ratio of the continuously variable transmission. shall refer to.

As explained above, the yarn winding device of the present invention packages yarn continuously supplied at a constant speed with a predetermined constant tension and by sequentially decreasing the winding width as the winding diameter increases. A spindle drive type winder,
A traverse fulcrum guide provided on the yarn feeding side of this winding machine,
A tension detector is provided on the yarn feeding side of the traverse fulcrum guide in an area where the yarn travels in a substantially straight line, and is of a type that generates a signal proportional to the tension based on the pressure of the yarn in contact with the yarn. A swing guide that periodically swings the yarn and makes the thread intermittently contact a tension detector, and a control that controls the rotational speed of the winding spindle of the winding machine in response to signals from the tension detector. A tension detector is used to intermittently detect the tension of the yarn oscillated by the oscillating guide. Therefore, the tension of the yarn can be detected with high precision, and the yarn can be wound at high speed while maintaining a predetermined constant tension with high precision. In addition, the tension detector does not strain the yarn so much that it causes almost no damage to the yarn. Furthermore, since the tension loss in the tension detector is small, even when winding a large number of yarns at the same time, it is not necessary to detect the tension of all the yarns, and so-called representative weight control becomes possible.

The above-mentioned effects of the present invention include a swing guide that periodically swings the thread and brings the thread into contact with the tension detector intermittently, and rotates in the same direction as the running direction of the thread. This becomes even more noticeable when a rotating guide is used.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing an embodiment of the yarn winding device of the present invention, and FIG. 2 is a side view of the main part of FIG. 1. 1A, 1B: Godet roller, 2A, 2B: Yarn, 3: Anti-vibration guide, 4: Rotating guide (oscillating guide), 5: Detection guide of tension detector, 6: Tension detector, 7: Blade of rotating guide , 8A, 8B: Traverse fulcrum guide, 9: Rotating guide motor, 10A,
10B: Winding spindle, 11: Motor, 12
A, 12B: Pan, 13: Controller, 14: Tension setting device, 15: Power controller.

Claims (1)

[Claims] 1. A yarn winding device that winds yarn continuously supplied at a constant speed at a predetermined constant tension and in a tapered shape at both ends of a package by sequentially decreasing the winding width as the winding diameter increases. This yarn winding device includes a spindle drive type winding machine, a traversing fulcrum guide provided on the yarn feeding side of the winding machine, and a traversing fulcrum guide provided on the yarn feeding side of the traversing fulcrum guide. A tension detector is installed in an area where the yarn runs in a substantially straight line and generates a signal proportional to the tension due to the pressure of the yarn in contact with the yarn, and the yarn is periodically vibrated to generate a signal proportional to the tension. a swinging guide that contacts the tension detector intermittently; and a controller that receives a signal from the tension detector and controls the rotational speed of the winding spindle of the winding machine; A yarn winding device characterized in that the tension of the oscillated yarn is intermittently detected by the tension detector.