JPH02204276A - Take-up device for filament - Google Patents

Abstract

PURPOSE:To control traverse speed so as to heighten the durability of the title device by providing a traverse speed control means for controlling a traverse means to set such a winding ratio as to obtain a tapered angle at any winding diameter which is larger than that on the changing curve of the tapered angle in relation to the winding diameter as well as diminished as the winding diameter is enlarged. CONSTITUTION:A driving means 2 for rotating a filament winding spindle 1 and traverse means 3, 4 for traversing filament to be wound to the spindle 1 are provided. The driving means 2 is controlled at a spindle rotating speed control means 9 so as to make the rotating speed of the filament constant regardless of its winding diameter. In addition, the traverse means 4 is controlled at a traverse speed control means 9 to set such a winding ratio as to obtain a tapered angle at any winding diameter, which is larger than that on the changing curve of the tapered angle in relation to the winding diameter obtained at the time of winding at the constant winding ratio as well as diminished as the winding diameter is enlarged.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a device for winding yarn while controlling the wind ratio so as to obtain a desired predetermined winding diameter-winding angle curve.

B. Prior Art Yarn winding devices using a constant wind ratio control system have been known for some time. This winds the yarn at a constant yarn speed, and mechanically links the rotation speed of the spindle that winds the yarn with the traverse speed of the traverse device that drives the yarn traverse along the spindle. This controls the wind ratio to be constant. However, if the yarn is wound while keeping the wind ratio constant, the winding angle will decrease significantly as the winding diameter increases, and the shape of the package will deteriorate. Therefore, Japanese Patent Publication No. 63-48790 discloses a winding control system in which the wind ratio is changed in stages from the start to the end of yarn winding so as to maintain the wind angle within a substantially constant range. ing.

C1 Problems to be Solved by the Invention However, in the device disclosed in this publication,
This is because the winding angle is maintained within a certain range with a certain maximum value as it is wound.

Even if the winding diameter becomes large, the traverse speed is high, which may cause problems in the durability of various elements that make up the traverse device.

A technical problem of the present invention is to suppress the traverse speed to such an extent that the winding angle does not decrease to the extent that the package shape deteriorates as the winding diameter increases, and the durability of the traverse device is not affected.

00 Means for Solving the Problems The present invention will be explained with reference to FIG. A traverse means 3.4 for traversing the yarn, a spindle rotation speed control means 9 for controlling the drive means 2 so that the speed of the yarn is constant regardless of the winding diameter, and The traverse means 4 is configured to set a wind ratio such that a winding angle that is larger than the curve of change of winding angle with respect to winding diameter at any winding diameter and that decreases as the winding diameter increases.
By providing the traverse speed control means 9 for controlling the traverse speed control means 9, the above-mentioned technical problem is solved.

As the E0 effect package winding diameter increases, the predetermined winding diameter -
The winding angle decreases according to the winding angle curve (see curve 23 in Figure 3), and the winding diameter-winding angle curve is smaller than the winding diameter-winding angle curve obtained when the wind ratio is constant (curve 21 in Figure 3). It is a curve in which the winding angle is large and decreasing also for the original winding diameter. Therefore, while maintaining the package shape well,
The traverse speed is suppressed compared to the constant winding angle control method,
The durability of the traverse device is improved.

In the above-mentioned sections and section E, which describe the present invention in detail, figures of embodiments are used to make the present invention easier to understand, but the present invention is not limited to the embodiments.

F. Embodiment An embodiment of the yarn winding device according to the present invention will be explained with reference to FIGS. 1 and 2. FIG.

FIG. 1 is an overall configuration diagram. A spindle 1 on which a yarn (for example, a yarn spun by a spinning machine, cooled, treated with an oil, and stretched to a desired degree if necessary) is wound is rotationally driven by a spindle motor 2. The rotation speed of the motor 2 is detected by a rotation speed sensor 11 .

The traverse device 3 transfers the yarn to be wound onto the spindle 1.
Traverse element 3
A, a traverse cam 3B that reciprocates this traverse element 3A, and a traverse motor 4 that rotates this traverse cam 3B.

The traverse device 3 is moved toward and away from the package by a separation motor 5 so as to maintain a constant distance from the package surface regardless of the package diameter.

The rotational speed of the traverse motor 4 is detected by a rotational speed sensor 12, and the winding diameter of a package formed by winding a thread on the spindle 1 is detected by a winding diameter sensor 13.

The control circuit 9 is a circuit including a well-known microprocessor consisting of a CPU, ROM, RAM, input interface (Ilo), etc., and controls the spindle motor rotation speed Ns according to a detection signal from the winding diameter sensor 13, etc., as described later.
and 8 traverse motor rotation speeds, and the motor drivers 6.
The rotational speed of the motors 2 and 4 is controlled via the motor 7. Further, the departure motor 5 is controlled via the motor driver 8 in accordance with the detection signal from the winding diameter sensor 13. Such a control circuit 9
A keyboard 14 for inputting various data such as wind angle, wind ratio, yarn speed and one winding time is connected to the keyboard 14, as well as a display 15 for displaying various data.

Such a yarn winding device is controlled by the processing procedure shown in FIG.

The procedure shown in FIG. 2 is started when the winding command signal for the spindle 1 is output, and first, in step S1, initial values NS, NT, . Remember. Furthermore, the detected value from the winding diameter sensor 13 is stored as the initial value D0 of the winding diameter.Next, in step S2, the spindle motor 2 and the traverse motor 4 are driven and rotated to an initial rotation speed NSotNT. , proceed to step S3. In step S3, the winding diameter sensor 13
The winding diameter of the package is detected based on the detection signal from , and the process proceeds to step S4. In step S4, the spindle motor rotation speed N8 is determined from: In step S5, the winding angle θ is determined from a predetermined winding diameter D-winding angle 8 curve, &I (winding angle change curve).

Here, the curve of winding diameter and winding angle θ will be described in detail.

When controlling the yarn speed to be constant regardless of the package winding diameter,
As can be seen from equation (1), the spindle motor rotation speed Ns decreases in proportion to the increase in the winding diameter.

Therefore, when the traverse motor rotational speed NT is kept constant, the winding angle θ decreases greatly in proportion to the winding diameter, as shown by the curve 21 in FIG. 3, and the package shape deteriorates. Therefore, as disclosed in Japanese Patent Publication No. 63-48790 mentioned above, when the maximum winding angle θ1IaX is kept constant as shown by curve 22 in FIG. 3 and the winding angle θ is controlled within a predetermined range, a
= The wind ratio in each section of h is kept constant, but as the wind ratio moves from section a to section A, the wind ratio becomes smaller, so the traverse motor rotation speed NT does not change even if the winding diameter increases and remains at the initial rotation. As a result, the durability of the traverse element 3A and the traverse cam 3B deteriorates. Therefore, in the present invention, the first curve 21 and the curve 22
In the middle of , there is a curve 2 in which the winding angle θ decreases approximately in proportion to the winding diameter.
3 is set to suppress the traverse speed to such an extent that the winding angle does not become so small that the package shape deteriorates as the winding diameter increases, and the durability of the traverse device 3 is not affected.

In FIG. 2, the process proceeds to step S6 following step S5, based on the traverse width Ts, which is known in advance, the detected winding diameter, and the calculated winding angle θ.

s to find the traverse motor rotation speed NT. Here, traverse @ T s is the length along the spindle 1 per traverse, and is the number of revolutions of the traverse motor 4 per traverse.

Thereafter, in step S7, it is determined whether the package winding diameter has reached a predetermined value DR. If negative, the process returns to step S2, and in steps S4 and 6, the newly set rotation speed N! 3. The spindle motor 2 and traverse motor 4 are controlled by NT. When step S7 is determined, the spindle motor 2, traverse motor 4, and takeoff motor 5 are stopped in step S8, and the process ends.

Through such a control procedure, the winding angle is made small to the extent that it does not decrease to the extent that the package shape deteriorates as the package winding diameter increases, so the traverse motor rotation speed NT is adjusted according to equation (2). is reduced, the traverse speed can be suppressed, and the durability of the traverse device can be improved while maintaining a good package shape.

Although the package diameter is detected by the winding diameter sensor, the winding time may be monitored and the package diameter may be sequentially detected from the yarn speed and spindle diameter. In addition, although the helix angle was made smaller in proportion to the winding diameter,
2, the wind ratio is controlled to be constant within each section of the predetermined winding diameter range a = h, and as it progresses to a = h, the wind ratio is set smaller, and each wind ratio (
The maximum helix angle in each section) may be made smaller according to the winding diameter. In this case, the winding angle decreases with a sawtooth waveform.

G1 Effects of the Invention According to the present invention, the winding angle is made small according to the winding diameter while maintaining the shape of the package well, so the traverse speed is suppressed and the durability of the traverse device is improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an overall schematic configuration of a yarn winding device according to the present invention, FIG. 2 is a flowchart showing an example of its processing procedure, and FIG. 3 is a diagram showing a winding diameter-winding angle curve. 1 Niss spindle 2 Niss spindle motor 3: Traverse device 4: Traverse motor 5: Takeoff motor
9: Control circuit 11.12: Rotation speed sensor 13: Winding diameter sensor 14: Keyboard 15: Display device Patent applicant Shimadzu Corporation Patent attorney Norihiro Nagai Figure 2 Figure 1 Figure 3 Winding diameter D

Claims (1)

[Claims] a driving means for rotationally driving a spindle for winding the yarn;
traverse means for traversing the yarn wound around the spindle; spindle rotation speed control means for controlling the drive means so that the speed of the yarn is constant regardless of the winding diameter; and winding at a constant wind ratio. The traverse means is controlled to set the wind ratio so as to obtain a winding angle that is larger at any winding diameter than a change curve of winding angle with respect to winding diameter obtained at the time of winding, and a winding angle that decreases as the winding diameter increases. 1. A yarn winding device comprising: traverse speed control means.