JP3584392B2 - Fluctuation control device for tension of cords - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tension fluctuation control device for cords such as yarn.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, yarns of uniform quality have been manufactured by applying a constant tension to a yarn using a weight or the like.
[0003]
However, it is now natural that the quality of the yarn is uniform, and the added value of a uniform yarn that feels artificial or has a natural natural feeling is desired. As a method for giving a functional variation, it has been generally practiced to change the yarn feed speed.
[0004]
[Problems to be solved by the invention]
In view of the above, it is an object of the present invention to provide a tension variation control device for cords, which can intentionally impart variations in appearance and function to cords such as yarn.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following technical means.
{Circle around (1)} The cord tension variation control device of the present invention includes a cord tension sensor and a braking mechanism for applying tension to the cords, and transmits the set tension to the braking mechanism for a set time only. It is characterized in that the tension of the cords is controlled to be a set value with respect to the load on the cords detected by the tension sensor.
[0006]
In the tension variation control device for cords, the tension of the cords is controlled to be a set value, and the tension set in a portion set for the cords can be set to the tension. Note that, for example, a motor or a brake can be used as the braking mechanism.
{Circle around (2)} The tension of a plurality of cords may be controlled independently.
[0007]
When configured in this way, by controlling the tension of two or more cords independently, a tension suitable for each of cords of different types and the like is given, and the quality and function of each cord are more excellent. It can be.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
As shown in FIGS. 1 to 6, in this embodiment, the tension control device for cords is incorporated in a rewinding machine for winding the yarn unwound from the yarn supplying bobbin 1 onto the winding bobbin 2. In.
[0009]
This tension variation control device includes a tension sensor S for cords and a motor as a braking mechanism M for applying tension to the cords, and transmits a preset tension (signal) to the braking mechanism for a preset time. In response to the load on the cords detected by the tension sensor S, the tension of the cords is controlled to be a set value. Although the motor M is used as the braking mechanism, for example, a brake or the like may be used instead.
[0010]
The mechanism for controlling the tension includes a yarn winding roller (tension pulley) 3 formed so as to be rotatable by a DC motor as shown in FIGS. An electrostatic capacity type tension sensor provided on a winding roller (sensor pulley) 5 for changing the direction of the tension of the yarn output from the winding roller 3 via a return pulley 4. The peripheral speed of the winding roller 3 on the output side is controlled so that the detected tension approaches the proper value corresponding to the yarn.
[0011]
A DC brushless motor is used as the motor, the rotational resistance of the DC motor is controlled by a back electromotive force, and the tension detected by the tension sensor S is fed back to the DC motor to change the rotational resistance of the motor, thereby reducing the yarn tension. adjust. A spring tensor 6 is provided on the input side to eliminate chattering of the yarn.
[0012]
Further, as shown in FIG. 5, a setting unit 7 for setting the tension and time of each set is provided, and the set tension value is transmitted from the setting unit 7 to each set of the tension sensor S and the motor collectively. I have to.
[0013]
Next, a description will be given of a use state of the cord tension variation control device of this embodiment.
[0014]
In the control device for varying the tension of the cords, the tension of the cords is controlled so as to be a set value, and the tension set at the location set for the cords can be set. Therefore, as shown in the following specific embodiment (FIG. 6), there is an advantage that variations in appearance and function can be intentionally given to cords such as yarns relatively easily.
[0015]
Further, even if a factor such as a load variation occurs in the tension variation control device of the cords, a tension (signal) set in advance is transmitted to the braking mechanism M for a preset time and detected by the tension sensor S. The tension of the cords is controlled to be the set value against the fluctuation of the load on the cords that has been set, so that the tension of the cords can be almost close to the set value regardless of the occurrence of the fluctuation factor. it can.
[0016]
That is, an unexpected load such as the yarn pulled out from the yarn supplying side bobbin 1 may be generated, and the yarn may fluctuate in tension. However, the tension of the yarn generated between the input side and the output side of the yarn may be varied. Thus, it is possible to reduce the influence of the change in the original tension after the output, and to perform the rewinding with the initially set tension.
[0017]
Therefore, there is almost no variation in the quality of the wound yarn or the like. Further, since the tension of the yarn on the side to be wound is directly controlled by the tension sensor S and the braking mechanism M, the tension of the yarn can be easily and accurately adjusted.
[0018]
Here, a specific embodiment will be described.
[0019]
FIG. 6 is a graph showing an example of a pattern for setting the tension of the yarn. When the winding of the yarn is started, first, the set tension (20 gf) is transmitted for the set time (t ₁ ), and the braking mechanism M operates so that the yarn is at the tension. Next, the set tension (50 gf) is transmitted for the set time (t ₂ ), and the braking mechanism M operates so that the yarn is at the tension. In this embodiment, the time is set from the set time (t ₁ ) to (t ₅ ), and the operation is continued until the winding is completed. When a plurality of rewinding yarns are used, different settings may be made for each yarn.
[0020]
When this device is used, the tension of the yarn can be freely changed by gradually reducing the winding tension in a winder or the like. That is, if the upper layer of the winding bobbin 2 is loosely wound, it is possible to avoid excessively tight winding, and it is easy to unwind. Therefore, the graph of FIG. A pattern in which the tension is gradually reduced can also be used.
(Embodiment 2)
Next, the second embodiment will be described focusing on differences from the first embodiment.
[0021]
As shown in FIGS. 7 to 9, in this embodiment, the fluctuation control device for the tension of the cords (yarns) is adjusted by combining a plurality of (two) yarns from the yarn supply side bobbin 1 into one winding bobbin. It is applied to a yarn winding machine that winds up to 2.
[0022]
The physical properties of the yarn (fiber) differ depending on the material and the thickness. For example, when the silk yarn and the polyester yarn are combined into one, it is preferable to apply a tension according to the properties of each yarn. This yarn winding machine is provided with a capacitance type tension sensor S for each yarn and a braking mechanism M (motor) for applying tension to the yarn, and the tension of each yarn detected by the tension sensor S at the time of winding is set to a set value. Each motor is controlled with respect to the fluctuation of the load on the yarn so as to maintain the load.
[0023]
The tension fluctuation control device is capable of independently controlling the tensions of a plurality of yarns, giving a tension appropriate to each of different types of yarns, giving variations to each yarn, and improving the quality and function of each yarn. It can be excellent.
[0024]
For example, when two or more yarns having different colors and types are wound as one yarn as a plurality of yarns, a yarn having a new texture can be obtained. In addition, when a yarn that easily dyes and a yarn that hardly dyes are combined or various colors are mixed, a yarn with a deep color can be obtained.
[0025]
As shown in FIG. 8, the yarn with the smaller tension set for the two yarns was slacker than the yarn with the larger tension set so as to be exposed to the outside, and these alternately appeared at regular intervals. Note that three or more yarns can be combined and combined.
[0026]
Next, specific examples will be described.
[0027]
As shown in FIG. 9, the tension (signal) was transmitted at intervals of 0.1 seconds, and the setting of the tension of the two yarns was changed alternately, and the color of the combined yarn was changed at regular intervals. .
[0028]
In the conjugated yarn (partially shown) shown in FIG. 8, the left side of the figure has the yarn A slackened and exposed to the outside, while the yarn B is inside. Therefore, the color of the yarn A is mainly visible after the yarn is combined. In the center of the figure where the thread tension is reversed between the thread A and the thread B, the thread B is slack and exposed to the outside, whereas the thread A is inside. Therefore, the color of the yarn B is mainly visible after the yarn is combined. Further, in the right side of the drawing in which the tension of the yarn is reversed between the yarn A and the yarn B, the yarn A is slackened and exposed to the outside, whereas the yarn B is inside. Therefore, the color of the yarn A is mainly visible after the yarn is combined.
(Embodiment 3)
Next, a third embodiment will be described focusing on differences from the above embodiment.
[0029]
As shown in FIG. 10, in this embodiment, the fluctuation control device for the tension of cords (yarns) is applied to a false twisting machine that falsely twists a yarn from a yarn supplying bobbin 1 and winds the yarn around a winding bobbin 2. ing.
[0030]
This false twisting machine draws a yarn from the yarn supplying side bobbin 1 by a feed roller 8 and performs a fluctuation control so that the tension of the cords is set to a set value with respect to the load on the cords detected by the tension sensor S. Then, the yarn is twisted and returned, and the yarn is wound on the winding bobbin 2 via the roller 10.
[0031]
According to this false twisting machine, there is an advantage that the yarn can be intentionally made to have a natural irregular feeling by incorporating a random element in the way of setting the tension.
[0032]
【The invention's effect】
The present invention is configured as described above and has the following effects.
[0033]
Since the tension set in the location set for the cords can be set to the tension set for the cords such as yarn, a variation control device for the tension of cords that can intentionally give variations in appearance and function to cords such as yarns is provided. Can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a rewinding machine according to a first embodiment in which a tension control device for cords of the present invention is incorporated.
FIG. 2 is a perspective view illustrating a tension control device for cords shown in FIG. 1;
FIG. 3 is a front view for explaining a tension variation control device for cords shown in FIG. 1;
FIG. 4 is a side view illustrating the tension control device for cords shown in FIG. 1;
FIG. 5 is a view for explaining a setting unit of the tension control device for cords shown in FIG. 1;
FIG. 6 is a graph showing an example of a pattern for setting the tension of the yarn of the rewinding machine of FIG. 1;
FIG. 7 is a diagram illustrating a yarn winding machine according to a second embodiment to which the tension control device for cords of the present invention is applied.
FIG. 8 is a diagram illustrating the structure of a yarn that has been twined by the twining machine of FIG. 7;
FIG. 9 is a graph showing an example of a pattern for setting the tension of the yarn by the yarn winding machine of FIG. 7;
FIG. 10 is a diagram illustrating a false twisting machine according to a third embodiment to which the tension variation control device for cords of the present invention is applied.
[Explanation of symbols]
S tension sensor M braking mechanism

Claims (2)

A tension sensor for cords and a braking mechanism for applying tension to the cords are provided, and the set tension is transmitted to the braking mechanism for a set time within a set time, and the cords are subjected to a load on the cords detected by the tension sensor. A tension control device for controlling the tension of cords, wherein the tension of the cords is controlled to a set value. 2. The tension variation control device for cords according to claim 1, wherein the tension of a plurality of cords can be controlled independently.

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