JPH09263358A - Yarn tension adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply state tension to yarn without napping it by providing a simple structure comprising a friction plate mounted on a rotation shaft connected to the end of a roller and a brake plate mounted opposite to the friction plate and by pressing the brake plate on the friction plate to produce friction resistance. SOLUTION: Yarn 20 is guided by an entry guide 2 to a roller 9 and is wound around the roller 9 one turn and then is wound around a coiling roller via an exit guide 3. When the coiling roller winds the yarn 20, the roller 9 is rotated at the same speed as the coiling speed of the yarn 20. The valve of an air supply hole 17 is closed and air is supplied to a pressure room 18 from the air supply hole 16 to increase the pressure in the pressure room 18, whereby a thin plate 14 is deformed. When a brake plate 11 is pressed on a friction plate 10, the speed of the roller 9 is decreased to increase the friction force between the roller 9 and the thread 20, whereby tension is applied to the yarn. The thread 20 is wound spirally around the tapered portion of the roller 9 to prevent the wound yarn 20 from being rubbed each other when the tension is applied, which prevents the rough surface and napping of the yarn 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn tension adjustment used for imparting tension to a traveling yarn in a drawing process, a false twisting process, a winding process, a warping / weaving process, etc. in the production of fibers. It relates to the device.

[0002]

2. Description of the Related Art When a yarn of undrawn yarn or drawn yarn wound on a drum or bobbin is preliminarily stretched or rewound during a fiber manufacturing process, a certain tension is applied to the yarn. A yarn tension adjusting device is used to do this.

Conventionally, as this type of yarn tension adjusting device, a tensioner washer type or ring washer type yarn tension adjusting device has been used, and the yarn is inserted between the rings or urged by a weight. There was one that was passed between the washers to give a constant tension.

Further, as another yarn tension adjusting device, as shown in FIGS. 5A and 5B, a cylindrical main post 32 and a plurality of auxiliary posts 33 are provided on a plate 31, and a yarn guide is provided. There has been a threaded yarn 35 which is passed through the hook 34 to be hooked on the main post 32 and the auxiliary post 33 as shown in FIG. 3 (b) so as to run (see Japanese Utility Model Publication No. 47-12036).

In this state, for example, when the yarn 35 is wound around the winding roller 36 and the yarn 35 is run to the right in the drawing, the yarn 35 is frictional force with the main post 32 and the two auxiliary posts 33. It was supposed to be tensioned by.

Further, the plate 21 is provided with a large number of mounting holes 31a for the auxiliary posts 33 so that the tension can be adjusted by changing the mounting position of the auxiliary posts 33 or changing the hooking method of the thread 35. It was.

[0007]

However, when a thread tension adjusting device of a tensor washer type or a ring washer type is used for a yarn having a high yarn speed such as a new synthetic fiber, there is a problem that surface roughness and fluffing are likely to occur. there were.

On the other hand, in the yarn tension adjusting device shown in FIGS. 5 (a) and 5 (b), there is the inconvenience that the auxiliary post 33 must be replaced in order to change the tension, and moreover, delicate adjustment cannot be performed. .

Further, since the tension of the yarn 35 changes during traveling, it is required to reduce unevenness of the tension when passing through the yarn tension adjusting device, as shown in FIG.
It is difficult for the yarn tension adjusting device shown in (b) to adjust the unevenness of the tension in response to the change in the tension of the yarn 35. That is, since the auxiliary post 33 for adjusting the tension of the yarn 35 is fixed to the plate 31, it is not possible to follow the change in the tension, and it is not possible to constantly apply a constant tension to the yarn 35.

In addition, since the yarn 35 is wound around each of the plurality of posts of the main post 32 and the auxiliary post 33, there is a problem that the surface of the yarn 35 is easily roughened or fluffed.

Further, when it is used as a tension adjusting device of a warper, it is necessary to apply a constant tension to the yarns 35 of several hundreds, and the directions of the yarns 35 passing through the tension adjusting device also vary. Therefore, adjusting the tensions of all the yarns 35 to a constant level is a very complicated work, and when using the yarns 35 having different yarn types and yarn counts, it is necessary to adjust the tension depending on the new yarn 35. In order to be able to apply the tension, it is necessary to manually change the settings of all the tension adjusting devices, which requires a lot of labor and time.

Further, in the case of running ultrafine fibers which have been widely used in recent years, it is necessary to run while maintaining a low tension constant, but as described above, the conventional yarn tension adjusting device provides a constant low tension. There is also a problem that thread breakage easily occurs because it is difficult to keep.

An object of the present invention is to have a relatively simple structure, which can apply a stable tension to a yarn without causing fluffing, and a tension of a tension adjusting device provided in large numbers like a warper. An object of the present invention is to provide a yarn tension adjusting device in which the setting of can be easily and collectively changed.

[0014]

In view of the above-mentioned problems, the present invention is to adjust the yarn tension by winding the yarn around the outer circumference of the roller and applying a tension to the yarn by the frictional force between them. In the device, a rotating shaft having a friction plate at an end is connected to the roller, and a brake plate is arranged at a position facing the friction plate, and the brake plate is pressed against the friction plate. The feature is that tension is applied to the yarn by generating frictional resistance.

According to the present invention, the brake plate is attached to a deformable thin plate to correspond to the pressurizing chamber, and the thin plate is attached to the pressurizing chamber according to the gas pressure ejected from the gas supply hole. By deforming and pressing the brake plate provided on the thin plate against the friction plate to generate frictional resistance, tension is applied to the yarn.

Further, according to the present invention, the rotor is composed of two discs and a plurality of pins arranged at equal intervals on the periphery of the discs, and one of the discs is inclined and eccentric to form a cage. It was done.

[0017]

In the yarn tension adjusting device according to the present invention, the yarn is wound around one roller once or several times to apply tension, and therefore, the yarn accompanying the sliding with the roller. It is possible to reduce surface roughness and fluff, and to provide low tension without causing yarn breakage even if the yarn is an ultrafine fiber.

A rotary shaft having a friction plate at its end is connected to the roller, and a brake plate is disposed at a position facing the friction plate. The brake plate is pressed against the friction plate. By generating the frictional resistance, it is possible to generate a frictional force between the roller that rotates integrally with the friction plate and the yarn to apply tension to the yarn. Moreover, by appropriately adjusting the pressing force of the brake plate against the friction plate, the frictional resistance between the roller and the yarn can be controlled, and the strength of the tension applied to the yarn can be adjusted.

Particularly, in the yarn tension adjusting device according to the present invention, the brake plate is fixed to the deformable thin plate, and the jet gas is supplied to the thin plate to press the brake plate against the friction plate. Therefore, a constant tension can be applied to the yarn by controlling the gas pressure ejected to the thin plate provided with the brake plate.

Therefore, even if it is used in a tension adjusting device of a warper used to apply a constant tension to hundreds of yarns, the tensions of all yarns can be easily adjusted. Even when using yarns of different yarn types and yarn counts, it is possible to easily change the setting of the tension according to the new yarn.

Further, in the present invention, as another roller for winding the yarn, it is composed of two discs and pins arranged at equal intervals on the periphery of the disc, and one of the discs is inclined. Since the yarn is wound around the outer periphery of the roller at a constant pitch, it is possible to prevent surface roughness and fluff of the yarn caused by sliding of the wound yarns. .

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. 1A and 1B are views showing a yarn tension adjusting device according to an embodiment of the present invention, in which FIG. 1A is a front view and FIG.
-It is an X-ray sectional view.

The yarn tension adjusting device according to the present invention is provided with an inlet bracket 5 and an outlet bracket 6 on both sides of the tensor body 1 and an inlet guide 2 for guiding the yarn 20 to each bracket 5, 6. There is an exit guide 3,
The tensor body 1 can be attached to a table or the like by a mounting bracket 19.

In addition, a rotating shaft 7 rotatably supported by a bearing 8 is provided at the center of the tensor main body 1.
A closed cylindrical roller 9 is connected to one end for winding the yarn 20, and a disc-shaped friction plate 10 is provided at the other end. A brake plate 11 is arranged at a position facing the friction plate 10 with a slight gap, and the brake plate 11 is attached to a thin plate 14 made of a flexible and deformable rubber material, resin, metal or the like. is there. The brake plate 11
Holds the central portion of the thin plate 14 between the holding plate 12 and the washer 13 in order to bring the entire surface into contact with the friction plate 10 to generate a constant frictional resistance, and the holding plate 12 and the brake plate 11 are held. I am attached.

A thin plate 14 having a brake plate 11 is also provided.
Is clamped and fixed to the tensor body 1 by a lid 15 having two gas supply holes 16 and 17, and a pressurizing chamber 18 is formed between the lid 15 and the thin plate 14. is there.

Next, the operation of the yarn tension adjusting device according to the present invention will be described. First, the yarn 20 is guided from the inlet guide 2 to the roller 9, wound around the roller 9 once, and then wound around the winding roller (not shown) via the outlet guide 3. When the yarn 20 is wound by a winding roller (not shown) in this state, the roller 9 rotates at the same speed as the winding speed of the yarn 20 due to the frictional force between the roller 9 and the roller 20. The outer periphery of the opening of the roller 9 is tapered 9a.
As shown in FIG. 2, the yarn 20 wound around the tapered portion 9a of the roller 9 is wound in a spiral shape. Therefore, when applying tension, the wound yarn 2
Zeros can be prevented from sliding, and surface roughness and fluffing can be prevented.

Here, the valve (not shown) of the gas supply hole 17 on one side is closed, and the pressure chamber 1 is opened from the gas supply hole 16 on the other side.
When the jet gas is supplied to 8 to increase the pressure in the pressurizing chamber 18, the thin plate 14 is deformed, the brake plate 11 is pressed against the friction plate 10, and slippage occurs between the brake plate 11 and the friction plate 10. It will be. Therefore, frictional resistance is generated between the brake plate 11 and the friction plate 10, and the rotation speed of the roller that rotates integrally with the friction plate 10 is controlled. That is, the rotation speed of the roller 9 that has been rotating at the same speed as the winding speed of the yarn 20 is reduced, so that the frictional force between the roller 9 and the yarn 20 increases, and tension is applied to the yarn 20. Will be granted.

Therefore, the pressure of the gas ejected from the gas ejection hole 16 to the pressurizing chamber 18 is lowered to reduce the brake plate 1 to the friction plate 10.
If the pressing force of 1 is reduced, the frictional resistance between the friction plate 10 and the brake plate 11 is reduced.
It is possible to reduce the frictional force between the yarn 9 and the roller 9 which rotates integrally with the yarn 0, and to reduce the tension applied to the yarn. On the contrary, if the pressure of the gas ejected from the gas ejection hole 16 into the pressure chamber 18 is increased to increase the pressing force of the brake plate 11 against the friction plate 10, the friction plate 10
Since the frictional resistance between the brake plate 11 and the brake plate 11 increases, the roller 9 and the yarn 20 that rotate integrally with the friction plate 10
It is possible to increase the frictional force between the yarn and, and to increase the tension applied to the yarn.

As described above, in the yarn tension adjusting device according to the present invention, the gas pressure ejected to the thin plate 14 having the brake plate 11 is changed to control the frictional resistance between the brake plate 11 and the friction plate 10. By doing so, the tension of the yarn 20 wound around the roller 9 can be adjusted.

Therefore, when the yarn type or yarn count of the yarn is changed, the gas supply hole 16 is adjusted according to the strength of the required tension.
The thin plate 14 is controlled by controlling the gas pressure ejected from the pressurizing chamber 18 into
By changing the gas pressure supplied to, the strength of the tension of the yarn 20 wound around the roller 9 can be easily adjusted. Moreover, even if the yarn 20 is an ultrafine fiber, the gas pressure ejected to the thin plate 14 including the brake plate 11 is set to a minute pressure to reduce the frictional resistance between the brake plate 11 and the friction plate 10 to reduce the rotor resistance. By reducing the frictional force generated between the yarn 9 and the yarn 20, a constant low tension can be given to the yarn 20 without causing yarn breakage.
In addition, the yarn tension adjusting device according to the present invention can be suitably used as a tension adjusting device for a warper that has to apply a constant tension to the yarns 35 of several hundreds. That is, by branching from one place so that the jet gas of a constant pressure can be supplied to the gas supply holes 16 of each yarn tension adjusting device, the tension settings of all the tension adjusting devices can be adjusted at the same time. Is possible.

Further, in the yarn tension adjusting device according to the present invention, even if the yarn 20 is excessively tensioned to cause yarn breakage, the signal is detected by a separately provided yarn breakage sensor (not shown). The valve (not shown) on the gas supply hole 17 side is opened, high-pressure gas is ejected from the gas supply hole 17 to the pressurizing chamber 18, and the brake plate 11 is brought into complete contact with the friction plate 10 to make the roller 9 urgent. It can be stopped.
Therefore, the winding of the yarn 20 due to the overrun of the feed drum or the like can be prevented. The friction plate 10 and the brake plate 11 for adjusting the frictional resistance between the roller 9 and the yarn 20 must always generate a uniform frictional force while slipping each other.
Since it is necessary that the tension of the yarn 20 can be instantaneously adjusted and the abrasion resistance is excellent, the material forming these is a polyimide resin that is lightweight and has excellent sliding characteristics. A composite resin obtained by adding graphite to a polyimide resin or a polyimide resin is preferable, and ceramics such as alumina, zirconia, silicon carbide, and silicon nitride, which have excellent wear resistance, can also be used. Also, the friction plate 10
Both the brake plate 11 and the brake plate 11 may be formed of either resin or ceramics, and one may be formed of resin and the other may be formed of ceramics.

However, since a uniform frictional resistance must be generated between the friction plate 10 and the brake plate 11, the surface of either the friction plate 10 or the brake plate 11 has a center line average roughness ( Ra) preferably has a surface roughness of 0.5 μm or less.

The roller 9 around which the yarn 20 is wound is preferably one that is excellent in abrasion resistance with the yarn 20 and is relatively lightweight, such as stainless steel or alumite treated aluminum or alumina, zirconia, carbon It may be formed of ceramics such as silicon or silicon nitride.

Next, a yarn tension adjusting device according to another embodiment of the present invention will be described with reference to FIGS. 3 (a) and 3 (b). FIG.
The yarn tension adjusting device shown in (a) and (b) has the same structure as that of FIG. 1 except for the roller 9, and the rotor 9 has two discs 21 and 22 and the peripheral edges of the discs 21 and 22. The cage-like body 23 is composed of pins 21a and 22a arranged at equal intervals.

One disk 21 constituting the roller 9 is rotatably arranged on the tensor body 1 with a bearing 23,
The other disk 22 is attached to the rotary shaft 7 extending from the tensor body 1. Here, the disc 22 is arranged horizontally with respect to the rotary shaft 7, the disc 21 is inclined at a certain angle P from the horizontal line, and the center point thereof is arranged slightly offset from the center line of the rotary shaft 7. In addition, each disk 21, 2
The pins 21a and 22a are arranged at equal intervals on the peripheral edge of the facing surface of the second face 2, and the tips of the pins 21a and 22a are respectively inserted into the holes 21b and 22b of the disks 21 and 22 facing each other to form the cage 23. It is configured.

Therefore, when a thread 20 is wound around the roller 9 to apply tension, the pin 22a of the disk 22 abuts the hole 21b of the disk 21 as shown in FIG.
1, 22 will rotate integrally. Since the outer periphery of the roller 9 is tapered by the pin 21a of the disk 21, the wound yarn 20 is wound spirally at a constant pitch.

Therefore, similarly to the yarn tension adjusting device shown in FIG. 1, without winding the wound yarns 20 against each other,
Since tension can be applied to the yarn 20, surface roughness and fluffing of the yarn 20 can be prevented, and tension unevenness that occurs when the yarn 20 is running can be prevented. Of tension can be applied. Moreover, since the yarn 20 can be wound around the outer circumference of the roller 9 several times, it is suitable for applying a large tension.

[0038]

As described above, the present invention is a yarn tension adjusting device in which a yarn is wound around the outer periphery of a roller and a tension is applied to the yarn by a frictional force between the rollers. The roller is formed by connecting a rotary shaft having a friction plate at an end thereof, and disposing a brake plate at a position facing the friction plate, and pressing the brake plate against the friction plate to generate friction resistance. By applying tension to the yarn by doing so, it is possible to reduce the damage such as surface roughness and fluff that is given to the yarn wound around the roller and pulled out, and to apply a constant tension stably. can do.

Further, according to the present invention, the brake plate is attached to a deformable thin plate to correspond to the pressurizing chamber, and the thin plate is attached to the pressurizing chamber according to the gas pressure ejected from the gas supply hole. By deforming and pressing the brake plate provided on the thin plate against the friction plate, the tension setting work when the yarn type or yarn count of the yarn is changed is extremely easy and can be performed in a short time. In addition, the tension setting of all the yarns can be easily changed collectively even if it is used as a yarn tension adjusting device such as a warper. further,
According to the present invention, the above rotor is wound around by forming a basket-like body formed of two discs and pins arranged at equal intervals on the periphery of the disc, and one of the discs is formed to be inclined and eccentric. It is possible to prevent surface roughness and fluffing due to sliding of the yarns, eliminate tension unevenness of the yarns during running, and always apply a constant tension.

Therefore, by using the yarn tension adjusting device according to the present invention, it is possible to always provide a stable and high-quality yarn.

[Brief description of drawings]

1A is a front view showing a yarn adjusting device according to the present invention, and FIG. 1B is a sectional view taken along line XX thereof.

FIG. 2 is a plan view showing a structure near a roller provided in the yarn adjusting device of FIG. 1;

FIG. 3 (a) is a front view showing another yarn adjusting device according to the present invention, and FIG. 3 (b) is a sectional view taken along the line YY.

FIG. 4 is a plan view showing a structure near a roller provided in the yarn adjusting device of FIG.

FIG. 5 (a) is a front view showing a conventional yarn adjusting device,
(B) is a plan view thereof.

[Explanation of symbols]

 1 tensor body 2 inlet guide 3 outlet guide 5 inlet bracket 6 outlet bracket 7 rotating shaft 8 bearing 9 roller 10 friction plate 11 brake plate 14 thin plate 15 lid 16 gas supply hole 17 gas supply hole 18 pressurization chamber 19 mounting base 20 Yarn

Front page continued (72) Inventor Akira Kuwahara 1-14-29 Nishihonmachi, Kanazawa-shi, Ishikawa Prefecture Sun Kanazawa Building 9F, Kanazawa Sales Office, Kyocera Corporation (72) Seiichi Yano 4-chome, Nomachi, Kanazawa, Ishikawa Prefecture No. 5-22 Stock company Yano factory

Claims (3)

[Claims] 1. A yarn tension adjusting device in which a yarn is wound around an outer circumference of a roller and a tension is applied to the yarn by a frictional force between the yarns. And a brake plate is disposed at a position facing the friction plate, and the brake plate is pressed against the friction plate to generate friction resistance, thereby applying tension to the yarn. A yarn tension adjusting device characterized in that 2. The brake plate is attached to a deformable thin plate to correspond to a pressurizing chamber, and the thin plate is deformed according to the gas pressure ejected from the gas supply hole into the pressurizing chamber, The yarn tension adjusting device according to claim 1, wherein a tension is applied to the yarn by pressing a brake plate provided on the thin plate against the friction plate to generate frictional resistance. 3. A basket-shaped body comprising two discs and a plurality of pins arranged at equal intervals on the periphery of the discs, and one of the discs is formed by tilting and eccentricity. The yarn tension adjusting device according to claim 1 or 2, which is characterized.