JPH02265863A - Thread winding method - Google Patents

Abstract

PURPOSE:To obtain a random curve possible to cope even with a large size package by generating a speed change in a motor turning a drive shaft while transmitting its turning through a mechanical speed change means to a traverse cam driven by synthesizing both the speed changes. CONSTITUTION:An inverter 30 controls by its output a motor 31, when it turns a drive shaft 7, the first drive gear 3 fixed thereto is rotated, and an eccentric wheel 15 is turned by rotating an eccentric bush 5 through an eccentric bush driving gear 4. While by rotating the drive shaft 7, the second drive gear 9 is rotated turning a traverse cam 19 respectively through an output gear 10, holding plates 11, 12, turn arm 14 and a roller. Then the cam 19 is slided for guiding a guide roller 24 fitted to a cam groove 23, and by reciprocating a traverse 25 which supports a guide roller 24 together with the guide roller 24 a thread guide 26 is reciprocated by a predetermined speed and period, so as to traverse a thread rewound to a winding package.

Description

[Detailed description of the invention]

1. Field of Industrial Application 1 This invention relates to a method for winding yarn by performing traversing using a traverse cam in a winding machine.

[Conventional technology]

In the conventional yarn winding method using a traverse cam, as shown in FIG. 3, cam driving force is transmitted from transmission gear 1 to first drive gear 3 via idle gear 2, and The eccentric bush 5 is rotated by driving the eccentric bush drive gear 4 that meshes with it. On the other hand, the first drive gear 3 is connected to the drive shaft 7 by the key 6, and
is connected to the second drive gear 9 by the key 8, and the second drive gear 9 meshes with the output gear 10, so that the transmission gear 1
The output gear 10 is driven by this. Two clamping plates 11, 12 are provided at a distance from each other on the side surface of the output gear 10, and the first arm 14 of the rotating arm 13 is slidably clamped between them. The rotating arm 13 is rotatably fitted into the eccentric ring 15 of the eccentric bushing 5, and a second arm 16 and a third arm 17 are provided on the opposite side of the first arm 14 with a gap 18 between them. A cam roller 22 fitted to a shaft 21 of a port 20 fixed to a traverse cam 19 is provided within the interval 18 so as to be freely removable. The traverse cam 19 is keyed to the cam support shaft 27 and rotatably supports the negative center pusher 5. A cam groove 2 is formed on the surface of the traverse cam 19.
A guide roller 24 is slidably fitted therein, and a traverse bar 2 integral with the guide roller 24 is provided.
5 is reciprocated by the rotation of the traverse cam 19. A thread guide 26 is fixed to the traverse bar 25 for traversing the winding package. In the conventional device configured as described above, when the transmission gear 1 is rotated by an appropriate output, the idle gear 2. First drive gear 3. By rotating the eccentric bushes 5 through the eccentric bushes 4, the eccentric wheel 15 is rotated. On the other hand, the drive shaft 7 rotated by the rotation of the first drive gear 3 is connected to the second drive gear 9° output gear 10. Holding plate 11.12. Rotating arm 13. Traverse cam 1 via rollers 22 respectively
Rotate 9. Therefore, the thread guide 26 is connected to the cam 12 of the traverse cam 19.
3, and the traverse cam 19 deforms the approximate sine curve while the center of the rotating arm 13 moves due to the rotational movement of the eccentric wheel. Further, the period can be determined by slightly differentiating the gear ratio between the first drive gear 3 and the eccentric bush drive gear 4, and the gear ratio between the second drive gear 9 and the output gear 10, so that the period of the deformed approximate sine curve can be changed. The period for the waveform to return to its original state is lengthened. When traversing is performed using such a device, the yarns wound around the package are less likely to overlap at a predetermined period, and therefore ribbon winding due to overlapping yarns is less likely to occur on the surface of the package being wound.

Problem to be Solved by the Invention I In the conventional device as described above, the approximation sine curve is deformed and the period during which the waveform returns to its original state is lengthened, so the occurrence of ribbon winding is reduced. In recent years, the yarn feeding tension of industrial material yarns has increased to 10.5 Ai'f. In such wound balls, even with the conventional ones mentioned above, ribbon winding occurs because the speed fluctuations still form a pattern, and especially in the large diameter part of the wound ball, when the wind number is 1.2 or so, so-called tight Ribbon wrapping may occur. As a result, the problem of overlapping threads and twill drop on the end face of the wound ball was likely to occur as a secondary problem. The present invention aims to eliminate the drawbacks of the conventional winding method using a mechanical ribbon breaker of the sine curve approximation type, and to obtain a random curve that can be used for large-diameter packages as large as 1 ONS+. [Means for solving the problem 1] A drive shaft is rotated by a motor that generates speed fluctuations at a predetermined period based on the output of an inverter, and the rotation of the drive shaft is transmitted to a traverse cam via a mechanical speed fluctuation means. By doing this, it was decided that both speed fluctuations would be combined to drive the traverse cam. K action] The motor is driven at a predetermined cycle speed by the output of the inverter, and the rotation of the drive shaft is further added with a speed fluctuation of an approximate sine curve by mechanical means, and the traverse cam is generated with both speed fluctuations combined. to drive. (Embodiment) An embodiment of the present invention will be explained based on FIG. Conventional 8@
This device is similar to the conventional device shown in FIGS. 3 and 4, and is characterized in that a motor 31 controlled by an inverter 30 is provided on the same drive shaft 7 as that of the conventional device shown in FIGS. Therefore, the same reference numerals will be given to the peripheral parts in the conventional device and the device of the present invention for explanation. A motor 31 controlled by the output of an inverter 30 rotates a drive shaft 7. When the drive shaft 7 rotates, the first drive gear 3 fixed to the drive shaft 7 rotates as in the conventional device.
By rotating the eccentric bushes 5 through the eccentric bush drive gears 4, the eccentric wheel 15 is rotated. On the other hand, the second drive gear 9 fixed to the drive shaft 7 due to the rotation of the drive shaft 7
Rotate the output gear 10. Clamping plates 11, 12 (not shown in FIG. 2). Rotating arm 14. The traverse cam 19 is rotated via the rollers 22, respectively. As the traverse cam 19 rotates, the guide roller 24 that fits into the cam groove 23 is guided and moves, and the traverse bar 25 that supports the guide roller 24 reciprocates together with the guide roller 24.
The yarn guide 26 reciprocates at a predetermined speed and period to traverse the yarn wound around the winding package. Therefore, assuming that the drive shaft 7 is rotated by the motor 31 at a constant speed without any variation in the number of revolutions, the traverse cam 19 is caused to vary the speed of the transformed approximate sine curve by the same operation as in the conventional example. This speed fluctuation pattern is shown by graph 40 in FIG. The present invention further includes an inverter 30 that outputs output to the motor 31.
The power is supplied so that the output fluctuates in a triangular waveform as shown in the graph 41 of FIG. Due to such triangular waveform output fluctuations, the motor 31 causes rotational speed fluctuations of the same waveform. As a result, both characteristics are combined to provide electrical rotational fluctuation characteristics in accordance with the rotational fluctuation characteristics of the ribbon breaker of the sine curve approximation type by the above-mentioned mechanical means, and as a result, as shown in graph 42 of FIG. Causes rotational fluctuation characteristics. As a result, the speed fluctuation pattern becomes much more varied and random than the conventional one, so ribbon winding does not occur even when winding a large-diameter pancage. Note that any speed fluctuation waveform formed by the inverter 30 can be obtained by well-known adjustment of the inverter circuit, and an appropriate waveform can be selected as necessary. Further, the upper motor 31 may be replaced by a motor such as a servo motor that has a built-in inverter and which changes its rotational speed in response to a suitable external input signal.

【Effect of the invention】

The present invention rotates a drive shaft by a motor that generates speed fluctuations in a predetermined period based on the output of an inverter, and transmits the rotation of the drive shaft to a traverse cam via a mechanical speed fluctuation means, thereby achieving both speeds. By combining the fluctuations and driving the traverse cam, ribbon winding does not occur even when winding small diameter packages or large diameter packages where tight ribbon winding is likely to occur, and twill drop at the package end is prevented. Since this does not occur, a good winding form can be obtained. Moreover, since the package wound by the method of the present invention contains almost no ribbon layer, troubles such as ring removal do not occur during high-speed unwinding using a water jet, and unwinding is performed extremely smoothly.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing a partial cross section of an apparatus for carrying out the method of the present invention, Fig. 2 is a graph showing the rotation speed fluctuation characteristics, and Fig. 3 is a graph showing the rotation speed fluctuation characteristics.
4 and 4 show a conventional example, FIG. 3 is a partial sectional view thereof, and FIG. 4 is a sectional view of a rotating arm portion. 1st Figure 3...First drive gear. 4...Eccentric bush drive gear. 5... Eccentric bushing, 9... Second drive gear. 10... Output gear, 11.12... Holding plate. 13... Rotating arm, 15... Eccentric wheel. 17... Drive shaft, 19... Traverse (-scum). 23... Cam groove, 25... Traverse scum. 26... Thread guide, 30... Inno (-ta). 31...・Motor patent applicant Murata Machinery Co., Ltd. Agent Patent attorney Katsu Ohno Agent Patent attorney Reiko Ohno

Claims (1)

[Claims] 1. The drive shaft is rotated by a motor that generates speed fluctuations at a predetermined period due to the output of the inverter, and the rotation of the drive shaft is transmitted to the traverse cam via a mechanical speed fluctuation means, thereby eliminating both speed fluctuations. A yarn winding method characterized in that a traverse cam is driven in combination.