JPH0736945Y2 - Winder winding tension control device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winder winding tension control device for rewinding a spun tube yarn into a winding package.

[0002]

2. Description of the Related Art The winding tension of a yarn by a winder is considerably large due to the occurrence of large ballooning when the spun tube yarn is unwound. By the way, the tubular balloon controller is gradually lowered from the position surrounding the upper part of the bobbin as the winding progresses, so that the size of the ballooning during the winding is constantly maintained below a certain value, and as a result, the winding tension is reduced. This has already been proposed by the applicant.

[0003]

[Problems to be Solved by the Invention] The tension control by the above-mentioned balloon controller has produced favorable results.
Nevertheless, when the remaining amount of the spun tube yarn becomes small, the winding tension increases, which causes yarn breakage during winding and winding streaks in the winding package. In particular, the winding tension increases in proportion to the square of the winding speed, which is one of the obstacles to increase the speed of the winder.

An object of the present invention is to provide a winding tension control device for a winder which can suppress an increase in winding tension even when the residual yarn amount of the yarn supplying package becomes small.

[0005]

In order to achieve the above object, a cylindrical balloon controller that gradually descends from a position surrounding the upper portion of the bobbin according to the remaining yarn amount of the yarn supplying package, and an additional tension are applied. A tensor that applies controllable tension to the yarn being wound, a sensor that detects when the remaining yarn amount has decreased to a predetermined amount, and a tensor that receives the detection signal.
The control device is configured to gradually reduce the applied tension .

[0006]

[Operation] In the winding tension control device for the winder configured as described above, the balloon controller is gradually lowered to keep the yarn ballooning small until the remaining yarn amount of the yarn supplying package reaches about 30%. Leaning and winding tension are kept at a substantially constant value. When the winding progresses and the remaining yarn amount of the yarn supplying package reaches about 30%, the sensor operates to generate a detection signal, and the pressure of the tensor is gradually reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A winder winding tension control device of the present invention will be described with reference to FIGS.

The winding tension control device for this winder is
Balloon controller 1 arranged at a position surrounding the head of bobbin B of spun tube yarn, and yarn Y unwound from bobbin B
A tensor 2 that applies tension to the tensor, a sensor 3 that detects the progress of unwinding of the yarn Y, and a control voltage shown by the solid line in FIG. 3 are sent to the actuator 4 of the tensor 2 in response to a command from the sensor 3. .

As shown in FIG. 1, the balloon controller 1 has a substantially cylindrical shape, the inner diameter of the lower opening facing the head of the bobbin B is slightly larger than the outer diameter of the bobbin B, and the inner diameter of the upper opening is lower. It is of a smaller size, and is fixed to the tip of an operating rod 5a of an actuator 5 such as an air cylinder via a mounting rod 6. When the upper opening is narrowed in this manner, even if a small ballooning occurs in the balloon controller 1, almost no ballooning occurs after exiting the upper opening.

As shown in FIG. 2, the tensor 2 comprises a fixed portion 2a in which a plurality of protruding walls are erected at equal intervals and a swinging portion 2b having a plurality of finger portions which mesh with the protruding walls. Tension is applied by bending the thread passing through the zigzag. In addition, the fixed portion 2a of the swinging portion 2b
The yarn tension applied to the yarn Y can be changed by changing the degree of proximity to the yarn, that is, the bending degree of the yarn path. A base portion of the swinging portion 2b is swingably supported by the support shaft 7, and a rod 8 extending toward the actuator 4 is swingably attached to a portion extending to the opposite side of the support shaft 7. In addition to this, there is a tensor composed of rotating disks facing each other, but the type is not limited as long as the thread tension can be adjusted.

The sensor 3 is composed of a phototransistor or the like for detecting the reflected light of the light emitted toward the head of the spun tube yarn, and is attached to the balloon controller 1. In this case, when the yarn Y is unwound and the peripheral surface of the bobbin B is renewed and exposed, the amount of light received by the sensor 3 changes and the sensor 3
From this, a signal is output to the actuator 5 each time, the operation rod 5a is extended for a predetermined length, and the balloon controller 1 and the sensor 3 are also sequentially lowered as shown by the alternate long and short dash line in FIG. In this operation, the remaining amount of spun tube yarn is 30%.
However, even if the balloon controller 1 is lowered, the tension control is not performed thereafter. Therefore, the actuator 5 does not operate, and the signal output from the sensor 3 is sent to the actuator 4. In addition to this, a sensor may be provided on the operation rod 5a of the actuator 5, and the detected object may be placed at a position corresponding to the remaining amount of the spun yarn of 30%.

The actuator 4 is composed of a rotary solenoid or the like, and has a rotating shaft 4a on which a rod mounting plate 9 is attached.
Is fixed, and the rod 8 is rotatably attached to the rod mounting plate 9. A voltage as shown in FIG. 3 is applied to the actuator 4 during winding of the yarn. The higher the voltage is, the larger the rotation angle of the rotary shaft 4a is, and the larger the tension of the yarn Y applied by the tensor 2 is. .

Referring to FIG. The vertical axis represents the voltage applied to the actuator 4, and the horizontal axis represents the winding time when winding the spun tube yarn wound on one bobbin B into the winding package. High voltage of the first part (2
4V) is for compensating for the low tension during low speed operation at the beginning of winding. The next flat part is the reference voltage (20
V), and is set to continue until the time t ₃₀ when the remaining amount of the spun yarn is 30%. As described above, a signal is sent from the sensor 3 to the actuator 4 at this point. When this signal is sent, the voltage applied to the actuator 4 gradually decreases to a predetermined value (3 V) for a predetermined time (several tens of seconds) as preset, as shown in C.

FIG. 4 is a graph showing the relationship between the winding tension and the winding time in the winder equipped with the balloon controller 1. The solid line indicates that the remaining amount of spun tube yarn is 30%.
Gradually lowering the predetermined time the voltage across the actuator 4 to a predetermined value at the time point t ₃₀ became, is due to the tension control device of the invention for gradually decreasing the winding tension by the sensor 3. The case where such tension control is not performed is indicated by the alternate long and short dash line, and this difference is significant. That is, the yarn winding speed is 1500 m / min
The maximum winding tension is significantly reduced from the conventional 30 g to 25 g of the present invention, and the difference increases as the winding speed of the yarn increases.

[0015]

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

That is, even if the remaining amount of spun tube yarn becomes small,
The increase in winding tension can be suppressed to a minimum, and the occurrence of yarn breakage during winding and the occurrence of winding streaks in the winding package are reduced. These effects are more remarkable as the winding speed is higher.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a winding tension control device for a winder according to the present invention.

FIG. 2 is a perspective view of a tensor.

FIG. 3 is a graph showing the relationship between the voltage of the tensor actuator and the winding time.

FIG. 4 is a graph showing the relationship between winding tension and winding time.

[Explanation of symbols]

 1 Balloon Controller 2 Tensor 3 Sensor 4 Actuator B Bobbin

Claims (1)

[Scope of utility model registration request] 1. A cylindrical balloon control which gradually descends from a position surrounding the upper portion of the bobbin according to the remaining yarn amount of the yarn supplying package.
A roller , a tensor that applies tension to the yarn being wound with controllable tension, and the amount of remaining yarn is reduced to a specified amount.
A winding tension control device for a winder, which comprises a sensor for detecting the fact that the winder is wound and a control device for gradually reducing the additional tension of the tensor in response to the detection signal.