JPH082821A - High tension unwinding device - Google Patents

Abstract

PURPOSE:To provide a high tension release device capable of feeding yarn without any fuzzing, end breakage or the like through the release thereof from a bobbin under low tension, and further capable of concurrently and continuously carrying a plurality of the yarn under high and uniform tension after the release. CONSTITUTION:The rotation torque of a bobbin mounting spindle 11 is adjusted with the first torque adjusting device 16 for keeping the tension of yarn S released from a bobbin B at low level. The yarn S so released is wound around a pair of guide rollers 12 having no drive source, and the rotation torque of the rollers 12 is adjusted with the second torque adjusting device 17 for feeding the yarn S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high tension unwinding device for unwinding a yarn such as a yarn or a tape wound around a bobbin with a predetermined high tension.

[0002]

2. Description of the Related Art Generally, a long wire, thread, tape or sliver before manufacturing thread (hereinafter referred to as thread)
The yarn may be wound around the bobbin and handled, but such a yarn is pulled by a pulling device for pulling the yarn such as a winding device or a feed roller, and a high tension is applied to the yarn. It is unwound from Bobbin. The unwound yarn is subjected to various processes or treatments before being wound up on the winding device or the like.

The following is a conventional unwinding device for unwinding a yarn from a bobbin.

FIG. 4 shows a friction weight system.
In this friction weight type unwinding device, a pulley 2 is attached to an end of a bobbin mounting spindle 1, a leather belt 3 is wound around this pulley 2, a weight W is attached to the end of the leather belt 3, and a yarn S The rotational torque of the bobbin mounting spindle 1 caused by the pulling of the is controlled by the frictional force between the pulley 2 and the leather belt 3.

FIG. 5 is called a dancer roller control electric positive drive system. In this device, a motor M is attached to the end of the bobbin mounting spindle 1 and the yarn S
The dancer roller 4 is provided along the route through which the position is detected, and the vertical position of the dancer roller 4, which changes based on the slack of the yarn S caused by insufficient tension, is detected by the position detector 5, and a signal from this position detector 5 causes the motor M to move. The rotation drive of is controlled so that the normal unwinding is performed.

Although not shown, there is also a friction bearing system as another unwinding device. This device supports a bobbin mounting spindle with a bobbin attached to one end with a ball bearing and supports the other end with a friction bearing, and changes the unwinding tension value by changing the distance between the ball bearing and the friction bearing. (See, for example, JP-A-64-60573).

In such a conventional unwinding device, a high torque is applied to the bobbin mounting spindle 1 and the yarn S is sent out from the bobbin B with a high tension, which is as shown in FIG. There is also. This unwinding device is a tension dividing control device 7 including a multi-stage drive feed roller 6 and the like, in which low torque is applied to the bobbin mounting spindle 1.
And the dancer roller 4 and the position detector 5 are used to control the rotational drive of the motor M that drives the feed roller 6, and to control the unwinding tension value of the yarn S so that normal unwinding is performed. It is the one.

[0008]

However, the former FIG.
As shown in FIG. 5 and the like, in the case where a high torque is applied to the bobbin mounting spindle 1 and the yarn S is sent from the bobbin B with high tension, the high tension acts directly on the yarn S, and the yarn S is unwound at the time of unwinding. However, there is a drawback in that it is easily rubbed and fluffing or thread breakage occurs.

The latter shown in FIG. 6 sends the yarn S from the bobbin B with a low tension, so that it does not have the drawbacks of the former such as fluffing and yarn breakage, but the dancer roller 4 and the tension dividing control device. Control of 7 becomes complicated,
It is a cost disadvantage.

Further, among the plurality of yarns S, the feed roller 6 controlled by the dancer roller 4 using one of the representative yarns simultaneously conveys the plurality of yarns S to the yarn S at the same time. In the case of performing processing, for example, in the case of performing heat treatment or the like, it is desirable that each of the plurality of yarns S be conveyed in parallel and continuously from the bobbin B. If slack is generated in S, the tension of each yarn S is different, and the yarn S sent from the bobbin B may not be uniformly sent to the processing or processing step, and there is a possibility that a good quality product cannot be obtained.

For example, in a carbon fiber production line, low tension and fragile filament yarns such as pitch-based carbon fiber precursor fiber bundles are wound around a bobbin, and this yarn is unwound from a plurality of bobbins. While unwinding using a device, it continuously sends it out in parallel, and guide rollers installed at various places guide the yarn in a predetermined direction and position while continuously sending it to a processing device that performs firing and surface treatment. , Manufactures carbon fiber. When the filament yarn expands or contracts due to firing or surface treatment in the processing apparatus, each of the plurality of filament yarns may not have a uniform expansion / contraction amount, and some yarns may become slack. In such a case, it is necessary for the operator to properly select each yarn thread from many yarn threads and adjust the slack, which is a troublesome work.

The object of the present invention is to solve the above-mentioned problems of the prior art and to prevent fluffing and yarn breakage by unwinding the yarn from the bobbin with a low tension, and after unwinding, a high tension higher than a predetermined tension. An object is to provide a high tension unwinding device that can apply tension.

Another object of the present invention is to ensure that each of a plurality of yarns fed simultaneously is continuously and uniformly fed.

Still another object of the present invention is to provide a high tension unwinding device which is simple in control and construction and is advantageous in cost.

[0015]

According to the present invention for achieving the above object, a bobbin is mounted on a rotatably supported spindle, and a yarn wound on the bobbin is wound. In a high-tension unwinding device that pulls and unwinds with a predetermined high tension by a pulling device such as a device, the extent that the yarn unwound from the bobbin does not slide and is provided between the bobbin and the towing device. A pair of guide rollers that do not have a drive source wound by the number of turns, and are attached to the bobbin mounting spindle, and adjust the rotational torque of the spindle to adjust the tension of the yarn unwound from the bobbin. A torque adjusting device and a second torque adjusting device attached to the guide roller so as to adjust the rotational torque of the guide roller that is generated when the yarn is pulled, and are unwound from the bobbin. The first and second torque adjusting devices are adjusted such that a low tension is applied to the yarn immediately after and a tension higher than the high tension is applied to the yarn sent out from the guide roller. .

In the present invention for attaining the above object, in the pair of guide rollers, the axis of one guide roller has a predetermined inclination angle with respect to the axis of the other guide roller. It is characterized by

In the present invention for attaining the above object, the guide roller is provided for each yarn unwound from each of a plurality of bobbins, and these yarns are simultaneously fired or surface-treated. It is characterized in that it is sent through a processing device that performs processing and the like.

According to a fourth aspect of the present invention that achieves the above object, the pair of guide rollers are connected to each other through a synchronous transmission member.

According to a fifth aspect of the present invention that achieves the above object, the torque adjusting device is a mechanical torque adjusting device that generates a stable and constant torque.

In the present invention for attaining the above object, the number of times of winding of the yarn with respect to the guide roller is such that slipping does not occur due to the friction coefficient between the yarn and the roller surface and the difference in tension between the front and rear of the roller. The feature is that it is set.

In the present invention for achieving the above object, the tension applied to the yarn immediately after being unwound from the bobbin is 0.01 to 0.04 g / denier, and is sent out from the guide roller. The tension applied to the yarn is 0.1
It is 0.25 g / denier.

In the present invention to achieve the above object, the inclination angle of the guide roller is 3 to 10 degrees.

[0023]

According to the present invention, by adjusting the first torque adjusting device and the second torque adjusting device, the yarn can be unwound from the bobbin with a low release tension value, and fluffing and yarn The yarn can be unwound without breaking, etc., and after unwinding, a high tension equal to or higher than the traction force of the traction device can be applied to the yarn and conveyed.

Further, since the pair of guide rollers bear all the high tension applied to the yarn and the yarns do not overlap on the guide rollers, the yarn unwound from the bobbin has a low tension. Even if the yarn is fragile, the tension applied to the yarn is stable, and the yarn is sent to the processing device, which enables high-quality yarn production.

Moreover, since the pair of guide rollers has no drive source, the structure is simple and there is no complicated control.
It is also advantageous in terms of cost.

According to the second aspect, even if the yarn is wound around the pair of guide rollers a plurality of times, the yarn does not overlap.

[0027] According to the third aspect, the firing of the yarn, the surface treatment and the like can be performed quickly, which is advantageous in terms of cost.

According to the present invention, the rotation of both guide rollers is synchronized by the transmission member, and slippage does not occur due to the difference in tension between the rollers.

According to the fifth aspect, since the torque adjusting device is a mechanical torque adjusting device, a stable and constant torque is generated.

According to the sixth aspect, it is possible to prevent slippage between the yarn and the roller surface due to the number of times the yarn is wound with respect to the guide roller, and the structure is further simplified.

According to the seventh aspect, even a filament yarn which is low in tension and fragile can be unwound with a stable and constant low tension.

According to the eighth aspect, the yarns can be unwound smoothly without overlapping the yarns.

[0033]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing a part of a line for producing carbon fibers equipped with a high tension unwinding device according to the present invention, FIG.
2 is a perspective view showing an example of the high tension unwinding device, and FIG.
7 is a side view of the same, and the members common to the members shown in FIGS.

As shown in FIG. 1, at one end of this manufacturing line, a plurality of bobbins B are wound with a yarn S made of a carbon fiber material which is fragile and low in tension, such as a pitch-based carbon fiber precursor fiber bundle. (Only one is shown in the figure) is rotatably supported. Each of these bobbins B
Are respectively attached to the winding ball unwinding device 10, and the yarn S
Although the unwound yarn S is pulled out from the tip end side of the unwound yarn S by a pulling device 21 including a winding device or a multistage feed roller, for each yarn. A processing device P for performing firing and surface treatment is provided on the way of the transportation.

As shown in FIG. 2, the high tension unwinding device 10 of this embodiment has a bobbin mounting spindle 11 which is rotatably supported, and the bobbin B is provided at the tip of this spindle 11.
Is attached. The spindle 11 is not provided with a drive source and does not rotate by itself.

Bobbin B mounted on this spindle 11
The yarn S drawn out from is wound around a pair of cylindrical guide rollers 12a and 12b. This guide roller 12
The (guide rollers 12a, 12b) is sometimes called a Nelson roller, and in synthetic fiber, it is mainly used in the hot drawing step to continuously pass the yarn while applying tension to some extent. The guide roller 12 is attached to the tips of a pair of rotatably supported spindles 13a and 13b, and the outer peripheral surface thereof is plated with chrome so as to obtain a friction coefficient without slippage. As shown in FIG. 3, the rotation axis is relatively inclined by a predetermined angle θ. For example, the first guide roller 1
If the rotation axis of 2a is horizontal, the second guide roller 1
2b is slightly inclined downward. This inclination angle θ is 2 to
It is 15 degrees, preferably 3 to 7 degrees. Since the rotation axis of the second guide roller 12b faces downward, the yarns do not overlap even if the yarns are wound around the first and second guide rollers 12a and 12b a plurality of times. . Moreover, the guide rollers 12a and 12b are connected to each other via the timing belt 14 and the pulleys 15a and 15b, so that both guide rollers 12a and 12b rotate in synchronization.

Around the guide rollers 12, the yarn S unwound from the bobbin B is wound 1 to 30 times. The number of windings of the yarn around the guide roller is
It is preferable to set so that slippage does not occur due to the friction coefficient between the yarn and the roller surface and the tension difference between the front and rear of the roller.

More specifically, as the yarn S, the pitch-based carbon fiber precursor fiber bundle made of the low-strength and fragile carbon fiber material is used, and the guide roller 12 has an outer diameter of 50 to 100 mm. If used,
The number of times the yarn is wound on the guide roller 12 is 3 to 7 times,
More preferably, it is 7 times.

Since the guide rollers 12 are not provided with a drive source and do not rotate by themselves, the guide rollers 12 can be called depolarizing Nelson rollers.

In particular, in the high tension unwinding device 10 of this embodiment, the first torque adjusting device 16 for adjusting the rotational torque of the spindle 11 is provided at the rear end side of the bobbin mounting spindle 11 and the spindle 13 for the guide roller. A second torque adjusting device 17 for adjusting the rotational torque of the spindle 13 is provided on the rear end side. The first torque adjustment device 16 is
The second torque adjusting device 17 adjusts the tension of the yarn S pulled by the guide roller 12, and the second torque adjusting device 17 adjusts the rotational torque of the guide roller 12 caused by the yarn S being pulled by a pulling device or the like. The tension applied to the yarn S is adjusted.

In general, the yarn released from the bobbin causes a tension fluctuation due to a change in the winding diameter of the bobbin. However, in order to prevent tension fluctuation and to generate a more stable and constant tension in the yarn S, it is necessary to adjust the torque of the bobbin mounting spindle 11 and the guide roller spindle 13.

Therefore, in this embodiment, the torque of the spindles 11 and 13 is adjusted by the torque adjusting devices 16 and 17, so that the yarn immediately after being unwound from the bobbin B has a stable and constant low tension. However, the rotation torque of the spindle 11 or 13 is adjusted so that a stable and constant high tension acts on the yarn sent out from the guide roller 12.

For example, when the ratio of the tension applied to the yarn immediately after being unwound from the bobbin B and the tension applied to the yarn sent from the guide roller 12 is, for example, 1:10,
Even if the tension of the yarn immediately after being unwound from the bobbin B is increased to "2" to become "2", in this embodiment,
Due to the action of both torque adjusting devices 16 and 17, the tension of the yarn sent out from the guide roller 12 does not increase to "2" to "12" but is about "11".

The tension applied to the yarn S will be more specifically described. In the case of the low tension and brittle filament yarn, the tension applied to the yarn S immediately after being unwound from the bobbin B is 0. 01 to 0.04 g / denier, the tension applied to the yarn S sent from the guide roller 12 is 0.
It has been found desirable to adjust to 1 to 0.25 g / denier.

The torque adjusting devices 16 and 17 preferably use mechanical torque adjusting devices in order to generate a stable and constant torque. For example, as such a mechanical torque adjusting device, in addition to the friction weight type shown in FIG. 4, the dancer roller control electric positive drive type shown in FIG. Magnetic resistance type, electromagnetic powder, friction type, fluid friction type and the like can be used.

The high tension unwinding device 1 thus constructed
The yarn S sent from 0 is pulled by a pulling device 21 such as a feed roller through a roller 18 that guides the yarn S or changes the feeding direction, and is processed with a predetermined tension by the processing device P.
Is processed in. The portion beyond the exit side of the traction device 21 is conveyed to another processing device (not shown) or a winding device (not shown).

Next, the operation of the above embodiment will be described.

When the production line is operated, the traction device 21
Is activated, each yarn S is unwound from the bobbin B of each high-tension unwinding device 10, is pulled out, and a plurality of yarns S are simultaneously sent.

In this high tension unwinding device 10, the first torque adjusting device 16 attached to the bobbin mounting spindle 11 and the second torque adjusting device 17 provided on the guide roller 12 adjust the rotational torque of the spindles 11 and 13. adjust. Therefore, even in the yarn S which is pulled out by the pulling device and is given a predetermined high tension, this tension is directly applied to the bobbin B.
The guide roller 12 bears all the tension applied to the yarn S without the yarn S wound around the yarn S acting. Therefore, the unwinding of the yarn S from the bobbin B is performed under the low tension set by the first torque adjusting device 16, and fluffing and yarn breakage at the time of unwinding are prevented, and smoothing is performed. The yarn can be unwound and sent out, and a plurality of yarns sent at the same time can be continuously and uniformly conveyed.

On the other hand, since the guide roller 12 is torque-adjusted so that a larger tension than the tension applied by the pulling device is applied to the yarn, a larger tension is applied to the yarn S.
Will be added to. Also, this guide roller 12
Has no driving source and the axis of which has a predetermined inclination angle, the yarns S do not overlap on the guide roller 12, and the yarn S unwound from the bobbin B is low. Even when the yarn is fragile due to the tension, the tension when the yarn is unwound is stable.

As described above, since all high tensions applied to the yarn are not applied to the bobbin side when the bobbin is unwound, the high tension yarns are sent out without overlapping, so that the bobbin is unwound. Even if the yarn has low tension and is fragile, it will be fed into the processing device without any problem.

Then, the yarn S is guided by rollers provided at various places in the manufacturing line, the feeding directions are changed, fed in parallel to each other, and pulled by a pulling device 21 such as a feed roller, Each treatment device such as a graphitization treatment device and a surface treatment device installed along the production line is surely treated, and high-quality yarn can be produced.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the claims. For example, in the above-described embodiment, the pair of guide rollers in which the rotation axes are inclined is used, but in some cases, such inclination may not be necessary. Further, it can be used not only for a plurality of bobbins but also for a single bobbin, and the relationship between the pair of guide rollers is not limited to the timing belt, and other means, for example, a synchronous transmission member such as a chain is used. good.

[0054]

As described above, according to the present invention, by adjusting the torque adjusting device mounted on the bobbin mounting spindle and the first and second torque adjusting devices provided on the guide rollers, the bobbin can be operated with low tension. The yarn can be unwound, and the yarn can be unwound and delivered without causing fluffing or yarn breakage, and after unwinding, the yarn can be conveyed with higher tension. In addition, the pair of guide rollers,
Since all the tension applied to the yarn is loaded and the yarns do not overlap on this guide roller, even if the yarn unwound from the bobbin is a low tension and fragile yarn, it is applied to the yarn. The tension is stable and will be sent to the processing equipment,
High quality yarn production is possible.

Moreover, since the pair of guide rollers are constituted by those which do not have a drive source and whose axis line has a predetermined inclination angle, the structure is simple and there is no complicated control. Be advantageous.

[Brief description of drawings]

FIG. 1 is a schematic view showing a part showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of the unwinding device.

FIG. 3 is a side view of FIG.

FIG. 4 is a perspective view showing an example of a conventional unwinding device.

FIG. 5 is a perspective view showing another conventional unwinding device.

FIG. 6 is a perspective view showing still another conventional unwinding device.

[Explanation of symbols]

11 ... Bobbin mounting spindle, 12 ... Guide roller, 14 ... Timing belt, 16
... first torque adjusting device, 17 ... second torque adjusting device,
21 ... traction device, B ... bobbin,
S ... yarn, P ... processing device,
θ: inclination angle.

Claims (8)

[Claims] 1. A high-tension unwinder in which a bobbin is mounted on a rotatably supported spindle, and a yarn wound around the bobbin is pulled and unwound by a pulling device such as a winding device at a predetermined high tension. In the unwinding device, a pair of guide rollers provided between the bobbin and the traction device, which does not have a drive source wound by a number of turns such that the yarn unwound from the bobbin does not slide and move, A first torque adjusting device that is attached to a bobbin mounting spindle and that adjusts the rotational torque of the spindle to adjust the tension of the yarn unwound from the bobbin; and the guide roller that is generated by pulling the yarn. A second torque adjusting device attached to the guide roller so as to adjust the rotating torque, and a low tension is sent to the yarn immediately after being unwound from the bobbin from the guide roller. High tension unwinding device, characterized in that tension higher than the high tension is to adjust the first and second torque adjustment device to act. 2. The high tension according to claim 1, wherein the pair of guide rollers are configured such that an axis of one guide roller has a predetermined inclination angle with respect to an axis of the other guide roller. Unwinding device. 3. The guide roller is provided for each yarn unwound from each of a plurality of bobbins, and these yarns are simultaneously sent through a processing device that performs firing, surface treatment, etc. The high-tension unwinding device according to claim 1 or 2. 4. The high tension unwinding device according to claim 1, wherein the pair of guide rollers are connected to each other via a synchronous transmission member. 5. The high tension unwinding device according to claim 1, wherein the torque adjusting device is a mechanical torque adjusting device that generates a stable and constant torque. 6. The high tension solution according to claim 1, wherein the number of times of winding of the yarn with respect to the guide roller is set so that slipping does not occur due to a friction coefficient between the yarn and the roller surface and a tension difference before and after the roller. Ship device. 7. The tension applied to the yarn immediately after being unwound from the bobbin is 0.01 to 0.04 g / denier, and the tension applied to the yarn sent from the guide roller is
The high tension unwinding device according to claim 1, which has a denier of 0.1 to 0.25 g. 8. The inclination angle of the guide roller is 3 to 1
The high tension unwinding device according to claim 2, wherein the unwinding device is 0 degree.