JPS58174639A - False twisting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This paper relates to a friction false twisting device for synthetic fiber yarns, and more specifically, endless belts running in a mutually reactive manner are brought into contact and crossed, and the yarn is sandwiched between four yarns at the intersection. This invention relates to an improvement of a belt-type temporary piercing device that applies KjI7#li force and feeding force at the same time.

Conventionally, various false twisting devices have been proposed as means for twisting a 41kK yarn, such as the Binspire Fle type, internal friction type, and external friction type. The processing speed at which processed yarn can be stably produced is the highest with the external friction type false twisting device, and therefore this false twisting device is widely used industrially compared to K11i. However, the maximum speed of the external friction type false twisting device 1 is at most i
(There is a speed of 100 wr/minute, and when the speed is higher than this moderate speed, the thread feeding force decreases rapidly.

One of the reasons for this phenomenon is that the external friction type false twisting device employs a mechanism that applies heating and feeding force to the yarn by running the yarn in contact with the friction surface of a rotating body. When it comes to processing, the thread feeding force due to frictional force is decisively insufficient.

In order to increase the feeding force of the yarn, the friction coefficient during the heating W of the friction rotating body may be increased, and the tension on the heating side and the untwisting side of the yarn may be increased to increase the force pressing against the friction rotating body. It is possible to increase the amount. However, in the former case, there arises a problem of wear and tear on the friction rotary body, and there are limitations in terms of materials, mainly from the point of view of wear on the applied surface of the friction rotary body. Therefore, it is technically extremely difficult to increase the frictional force between the yarn and the frictional rotating body.
It is A. On the other hand, the tension on the heated side of the yarn increases during twisting, resulting in a decrease in the strength and elongation of the processed yarn.
However, there are problems such as the occurrence of feathers and frequent thread breakage.

Moreover, it resists the tension on the combustion side [A-j111LI/I
It is necessary to increase the feed force of the threads held by the IK as the processing speed increases, but in a circumferential friction type false twisting device where only a constant frictional force can be applied, the increase remains at a moderate level during processing. This causes a fatal interval @t', which is a sudden drop in the yarn feeding force, which is unique to the device. This sudden decrease in the feeding force of the yarn means that the yarn slips at the application #aN of the friction roller 1, and processing is caused by the vibration of the friction roller rolling at high speed or the vibration of the belt itself. Even minute fluctuations in conditions can induce stick slips, inhibit stable false twisting, and at the same time cause yarns to become fluffy and discontinued. In any case, a sudden decrease in the yarn feeding force is fatal to the external friction type false twisting device, and the processing speed that can be used for Yoshi 11 as a gray machine is limited to 1000 @ / division degree. can be.

False twisting cannot be expected at higher speeds.

On the other hand, the driving and driven wheels have the same diameter and are mounted in opposite directions Kjl! There is a so-called belt-type false-twisting koji pot in which false-twisting is imparted by bringing two endless belts into contact with each other at a distance of 1 m and introducing the contact INK yarns. Compared to the above-mentioned external friction type false twisting device, this device heats the yarn by sandwiching it between the yarn belts, making it possible to increase the contact pressure of the yarn belts. Therefore, since the frictional force between the yarn and the belt can be significantly improved, it is possible to significantly improve the yarn feeding effect. For these reasons, it is easily understood that the belt-type false twisting device is superior in high-speed processing.

However, even with such a method, the machining speed is l! It was confirmed in the testimonies of the present threat actors that as the temperature increases, the feed force decreases rapidly. This tendency is particularly noticeable in the region where the processing speed is 1500 m/min or more. Therefore, under high stress conditions as mentioned above, slight variations in processing conditions can cause the yarn to stick slip in relation to the belt.

Various problems such as the occurrence of fuzz and thread breakage as described in the section 11 of the circumscribed friction type scissors occur.

Therefore, the present falsifier proposed a temporary mat that solved the problem of a rapid decrease in the feed force of one line in the region where the processing mode was 1@0@■/min, particularly 10 (1@/min or more). As a result of our extensive research, we found that during high-speed running, the belt constantly expands and contracts as it is alternately subjected to tension on the tight side and tension on the slack side.
I learned that this causes stick-slip. Based on this knowledge, in order to prevent stick-slip, it is important to minimize the variation in tension between the tension side of the belt and the tension side of the belt, and to minimize the amount of expansion and contraction of the belt.

As a measure to reduce this belt tension fluctuation, power loss (hysteresis loss) is generally applied to the belt due to the belt material.
It is also possible to use a material with a large k value, but in this case, if a belt material with a large hysteresis loss is used, although it will suppress the tension fluctuation of the pel F, it will reduce the power transmission efficiency, which is not preferable.

The present invention prevents stick-slip (complicated bell)
As a result of focusing on shortening the length (L) of the non-contact belt with one rolling body as a measure to avoid becoming accustomed to the selection of one-item products and extremely easily suppress changes in belt tension, the present invention was developed.
It crawled.

That is, the present invention provides a belt-type false twisting device that applies twisting and transfer force to the yarn at the same time by pinching the intersection KA negative formed by intersecting endless belts running in opposite directions. Outside of the drive-side rotating body on which the scissor endless belt is suspended
This is a false twisting device in which (DA) is made larger than the outside II (DB) of the driven Ill11 rolling body, and the belt wrapping angle around the driving side rotating body is larger than that of the driven side rotating body.

The present invention is illustrated in the drawings! Explain. FIG. 1 is a partial perspective view showing the belt type false twisting device of the present invention. (Endless bell in Figure 1) 1m and sb are the driving side 1111 @ body 1a t lb and the driven side rotating body 1m
, 2b K, and these endless belts are connected to the driving side rotating body 1a + lb from a power source (not shown).
The vehicle is traveling in the direction of arrow B due to the power transmitted to it. By bringing these endless belts into cross-contact with each other, the bell) 1a, lb1 MIKJI touch
By causing the system head 1 to pass through the contact shaft, an additional force and a feeding force can be applied to the yarn 7 at the same time.

Figure 2 shows the driving side rotating body 1a (lb) and the driven side rotating body 1.
FIG. 3 is a positive Wi diagram illustrating the configuration of m (lb).

In the ore diagram, Sada is the configuration of the S inversion of the present invention, (
→←) is a comparative theory W141 for detailed explanation of the present invention
! ! It is. In addition, L1 to S are the driving side rotating bodies (la (
tb), t's (t'b)) and the belt, and the driven rotating body [!
-(zb), 2'a (2'b)] indicates the belt length to the point of contact with the belt, and DA (IyA) -DB
(D'B) indicates the outer diameter of the rotary body and the driven side rotary body, respectively.

FIG. 3 is a cross section WS when the endless belt is attached to the support rotating body Km. In Figure 3, h, h, .

h indicates the amount of crown, which will be described later.

Normally, in such a belt-type false twisting device, the sizes of the driving side rotating body and the driven side rotating body forming the endless bell F are the same as shown in Fig. 2 (b), G-→. is normal.

In contrast, the present invention adopts a rotating body configuration in which the outer diameter of the driving side rotating body is 4 larger than the outer diameter of the driven 1Il-rolling body as shown in FIG. 2 (A), thereby achieving the following. Can have many characteristics at once.

It is possible to make the belt wrapping angle (#) for the 1m driving side rotation larger than that of the conventional one (I II O" or more), improving the power transmission efficiency between the belt and the driving side rotating body. I can do it.

As a result, the ability to keep the speed of the running belt constant increases, and slips between the driving 1IIWjJ rolling element and the belt can be prevented during high-speed running.

(@belt length CL) can be made relatively short.

(c) B) ←) is simultaneously KqIed, it is possible to significantly reduce tension fluctuations in the carrying belt, and belt vibration can be suppressed as much as possible.

2) It is possible to reduce the small, medium and high height (crown amount) of the belt bearing surface of the rotating body,
Power transmission efficiency between the driven lllIg1 rolling element and the belt can be increased.

With regard to (a) to (b) above, (K details #IK''eL will be explained by the ff1llK).

As mentioned above, in order to prevent tick slip during work when accelerating at fIk speed, it is necessary to reduce tension fluctuations in the belt as much as possible, and for this purpose, it is effective to increase the belt length (L) to am. .

However, in the case of a conventional drive unit rIA@ body and a driven rotating body having the same size, the belt length (L
) can be increased to 41 m as shown in -, and since the weight of one rotating body can be reduced, the inertial mass can be significantly reduced and the driving power can be reduced. The number of belts increases significantly, and slip occurs between the drive-side rotating body and the belt. Furthermore, as the rotational speed of the electric motor increases, the vibration becomes more intense, causing vibrations of the entire device, which causes fluctuations in the belt's yarn gripping force, which is a characteristic of the belt-type 1iE111 device. K becomes. Therefore, it is necessary to take sufficient measures to suppress vibrations in the drive unit.

In addition, as in No. 1111tf→, the belt length (L) is reduced to L- by reducing the outer diameter of both rotating bodies and the belt circumference (1) must also be shortened. ,
The belt surface portions that have once contacted each other at the intersecting surface formed by the pair of belts come back to the belt intersecting surface in a short period and come into contact with the other belt. For this reason, as the heat dissipation efficiency of the frictional heat generated due to contact between the belts deteriorates, the amount of wear on the belts increases, and as a result, the belt replacement cycle becomes shorter, reducing the yield rate of the false-twisting device. A fatal problem arises: In order to avoid this problem, if the belt circumferential length (j) is made the same as that of the present invention, the belt length will be longer than -, and the belt tension fluctuation cannot be reduced as much as in the present invention.

On the other hand, in order to prevent the rotational speed of the driving lIIIgi rolling element from increasing, K should be increased by increasing the outer diameter of both rolling elements as shown in Fig. 2 (b). As the number of rotations increases, the number of revolutions of one rolling element on the drive side decreases, and the belt circumference [j] increases, which is preferable from the viewpoint of belt wear.However, in this configuration, the belt length - It is inevitable that the belt is longer than that of the present invention, and the tension fluctuation of the belt cannot be reduced as compared to that of the present invention.

Of course, by adjusting the outer diameter of the driving side 1 rolling element and the outer diameter of the driven IIa rolling element, the belt length (1) and the belt length rL1 can be made to be the same length as those of the present invention at the same time. Although it is possible, belt writing 111e is attached to the drive side rotating body.
1 is 1800 as in the case of ←) and ←1, which is smaller than - in the present invention, and the power transmission efficiency is correspondingly lower.
・It is not possible to improve the ability to keep the speed of the running belt constant.

In this respect, as shown in FIG. The belt can run stably at high speed without increasing the rotational speed of the rotating body, and the belt length (L) can be shortened without twisting the belt section (2). Furthermore, the angle at which the belt wraps around the drive-side rotating body can be increased, and the running mode of the belt can be kept constant.

Furthermore, due to the structure of the rotating body of the present invention, as described above, the ability to keep the running speed of the belt constant is high; therefore, as shown in FIG.
The stability of belt running can be maintained even if the crown l (h,) of the driving side rotating body is made relatively large, as shown in (2), and the crown amount (h,) of the driven @ rotating body is made relatively small. The driven side rotating body can be brought closer to the cylindrical rotating body than the conventional driven side rotating body, so the close contact with the belt can be improved.
It can make you feel refreshed and improve power transmission efficiency.

In addition, in the present invention, it is preferable that the belt length (II) is at least as long as the ZSOS original length in consideration of the belt replacement cycle due to wear, and the outer diameter (DB) of one rolling element on the driven side
It is preferable to set it to at least 110 cm or more in view of the lifespan of the rotating shaft, etc.
Generally speaking, it is preferable that DA/DB is 7.2 to 3, and 8ζ to 2. @KE to be r
Delicious.

As explained above, according to the belt-type false twisting device in which the rotating body of the present invention is configured such that the outer diameter of one rolling element on the driving side is larger than the outer diameter of the rolling element on the driven side, the belt circumference (j ) The belt length rL) can be shortened without shortening the belt length (rL), and at the same time, the belt wrap angle (#) around the drive-side rotating body can be increased, so belt vibration can be suppressed during high-speed machining, reducing the Stick-slip with the center can be prevented. This extremely simple structure of the rotating body has remarkable effects.

[Brief explanation of drawings]

11th! ll is a partial perspective view showing an example of the belt-type false twisting device of the present invention, FIG. 2 is a front view illustrating the structure of the drive 111 rotating body and the driven rotating body, and FIG. It is a cutaway view of the case when it is attached to a. In Figures 1 to 3, 1a m lb......Drive side rotating body 2m
+ 2b...River/ψ/driven rotating body jla r 3b
・・・・・・・・・On the other hand, Beltrom・・・・・・・・・
... Outer diameter DB of the drive side rotating body...
...Outer shaft of the t1 plow side mouth roll Figure 2, a). Ko)

Claims (1)

[Scope of Claims] (A belt-type temporary combustion system that simultaneously applies 4kK heating and transfer force to the yarn by sandwiching the yarn between the intersecting pels F, which are formed by intersecting and intersecting the endless pels F running in opposite directions. In the device, -
The endless belt is suspended outside the rotating body on the driving side! ! (0
A false-twisting device in which the outer diameter (DB) of the secondary roller is larger than the outer diameter (DB) of the first rolling element, and the belt wrapping angle around the rotating element on the driving side is larger than that of the rolling element on the driven side. (2) Outside the driven rotating body 1! The false twisting device according to claim 1, wherein (D, ) is at least 30 strands or more. +a+ The director (J) of the endless belt is at least 4 s
s. Temporary 'a device described in paragraph (1) of *1fll g for permission request when the person is above the Cabinet.