JPS6033750B2 - Driving method of revolving type winder with constant wind ratio - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for driving a revolving type winder that is spindle driven and winds at a constant wind ratio.

If winders are classified based on the drive method of the traverse device, they can be categorized into '
There is a method in which the spindle and the traverse device are driven by the same drive source, and a method in which the spindle and the traverse device are driven by separate drive sources, and the present invention belongs to the former.

In the former method, the ratio of the number of rotations of the spindle to the number of traverses, that is, the "wind ratio", is always constant.
This is called a constant wind ratio winding method.

The present invention relates to this winding method. While the constant winding angle method has a simple drive system, the threads on the package overlap at points where the number of rotations of the spindle and the number of traverses are in a simple integer ratio, resulting in the phenomenon of so-called ribbon winding.
Since normal winding is obstructed, measures to prevent this are required.

On the other hand, the constant wind ratio winding method can be said to be an excellent winding method in that it can prevent the ribbon winding phenomenon. When the constant wind ratio winding method is implemented in a revolving type winder, the drive system of the traverse device is usually configured so that it can be connected to the drive system of any spindle, and during winding operation, the yarn The traverse drive system is connected to the drive system of the spindle that is winding the thread, and when the thread is switched to another spindle by thread switching, the connection of the traverse drive system is also changed and the thread is connected to the drive system of the spindle that has newly started winding. Connected.

However, with this method, it is possible to always wind at a constant wind ratio, but for the reasons detailed below, the winding tension decreases when switching threads, causing problems such as thread sagging and thread breakage. 1 is a diagram showing the relationship between the number of rotations of a spindle and the number of traverses during yarn switching in a conventional revolving type winder. To explain this figure, the number of rotations of the spindle 1 gradually decreases as the package diameter increases, and the number of traverses of the traverse device linked to this spindle also gradually decreases. On the other hand, the drive of the spindle 2 is started just before the bobbin supported by the spindle becomes fully wound, and the spindle 2 reaches a predetermined rotation speed before the thread is switched. After the spindle 2 reaches a predetermined rotational speed, the revolving device is driven to perform thread switching.
Simultaneously with or after the thread switching, the traverse device is switched to the drive system on the spindle 2 side. However, since the spindle 2, which rotates at high speed, has no thread wound around it, the flywheel effect, that is, the G distortion is small.

The load of the traverse device is applied to the drive system of the spindle 2, and the rotational speed of the spindle 2 rapidly decreases.
The reason for this is that spindle 2 has a small curvature, and the traverse device, which until now performed traverse motion at a low speed following the rotation speed of spindle 1, increases its traverse speed in relation to the rotation speed of spindle 2. This is because "this requires a large amount of power. If the rotational speed of spindle 2 decreases due to the reasons mentioned above, it will not be possible to reliably change the thread when changing the thread, and the running will not be possible after the thread is switched." The winding tension of the system decreases, causing the thread to become tangled with guides and other materials, and the thread layer that has just been wound on the bobbin to slack, causing the thread layer to slip and making subsequent winding difficult. The present invention has been achieved in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method for driving a revolving type winder with a constant wind ratio in which there is no change in yarn tension when switching yarns.

That is, the present invention provides a method for driving a winding machine in which the rotational speed of the spindle on the side where the yarn is switched does not change immediately after the yarn is switched. In order to achieve the above object, the present invention is characterized in that the drive system of the traverse device is switched in advance so that the wind ratio is constant with respect to the new spindle before the yarn is switched.

Embodiments of the present invention will be described below with reference to the drawings. Basic configuration of a revolving type winder First, in FIG. 2, 1 and 2 are spindles, and 3 is a traverse device.

4 is a volving arm, which is rotatably supported on the frame 5 of the winder.

Two spindle turtles are rotatably supported at both ends of the volping arm 4. In the state shown in FIG. 1, the spindle is in the winding position and the spindle 2 is in the standby position, but the package P formed on the spindle 1 is When the tube is full, the revolving arm 4 is rotated by 180 degrees by a revolving drive mechanism (not shown) so that the spindles 1 and 2 change their positions with each other. intermediate shaft 6
is rotatably supported, and another intermediate shaft 7 is rotatably supported at the center of the intermediate shaft 6.

That is, the trevolving arm 4 and the intermediate spinal cords 6 and 7 are ~
It consists of three axles with the same center, and each axle is supported so that it can rotate independently of the others.
The drive system of the revolving winder spindle 2 and the drive system of the traverse device 3 are all composed of timing pulleys (hereinafter abbreviated as pulleys) and timing belts (hereinafter abbreviated as belts).

First, we will explain the spindle drive system. M is a drive motor for the spindle 1, and its rotation is transmitted from the pulley 8 at the end of the shaft to the intermediate shaft 6 via the belt 9 and pulley 10, and then to the end of the spindle via the pulley shaft 1 and the belt 12. Similarly, M2 is the drive motor of the spindle 2, and the rotation is transmitted from the pulley 14 at the end of the shaft to the belt i5, the pulley 16, the intermediate shaft 7, the pulley 17, belt turtle 8
The signal is transmitted to the pulley 19 at the end of the spindle 2, and the spindle 2 is driven. On the other hand, the traverse drive system is configured as follows. First, a pulley 20 for traverse driving is attached to the motor M, in addition to the pulley 8 for driving the spindle. communicated. CL is a clutch, and when this clutch is operated, the rotation of the pulley 22 is transmitted to the intermediate shaft 23, and further transmitted to the pulley 26 attached to the drive shaft of the traverse device 3 via the pulley 24 and belt 25. Then, the traverse device 3 is driven.

When the clutch CL is disengaged, the rotation of the motor M is not transmitted to the intermediate shaft 23, and the traverse device 3 is not driven. A pulley 27 for traverse drive is also attached to the motor base of the same machine, and the rotation of the motor base is transmitted to the clutch CL via the pulley 27, belt 28, and pulley 29, which operates the clutch CL2. Sometimes, the shaft 23, pulley 24, belt 35, pulley 2
6 to the traverse device 3, but the clutch C
When L is turned off, the rotation of motor M2 is not transmitted to traverse device 3. Operation of the revolving winding machine Due to the drive system configuration described above, when the spindle 1 is winding, the clutch CL is operated and the clutch C
By turning off L, the spindle 1 and the traverse device 3 are simultaneously driven by the motor M, and winding is performed at a constant wind ratio.

Further, when the spindle 2 is winding, the clutch CL is disengaged and the clutch CL is operated to maintain a constant wind ratio in the same manner as described above. Method of operating a revolving type winder The present invention is characterized in that, in a revolving type winder having the above-mentioned structure, the traverse device is switched at a time before the thread is switched. This will be explained with reference to FIG.

FIG. 3 is a diagram showing the relationship between the elapse of winding time, changes in the rotational speed of motors M, M2, operating states of clutches CL, CL2, changes in rotational speed of spindles 2, and changes in traverse number. be.

First, from time 0 to T2, the spindle 1 is winding and the clutch CL is in operation, so the spindle 1 and the traverse device 3 are both driven by the motor M, and during this time, the above-mentioned As shown, the yarn Y is wound around the spindle at a constant winding ratio.

Since the diameter of the package P increases as the winding progresses,
In order to keep the winding speed constant, the rotation speed of the motor M is reduced in inverse proportion to the winding diameter, and the rotation speed and traverse speed of the spindle are gradually reduced.

Now, as the full tube time 2 approaches, the motor M2 starts rotating in preparation for thread switching, the spindle 2 starts running, and reaches the initial required rotation speed at time T.

The feature of the present invention is that before the thread switching time T2, the clutch CL,
, CL is switched.

Due to this clutch switching operation, the load of the traverse device 3 is suddenly applied to the motor M2, so that the rotation of the motor base temporarily decreases. (This state is indicated by the arrow P.) Therefore, the rotation speed of the spindle 2 that has reached the predetermined rotation speed also moves and temporarily decreases, but it is necessary again by the thread switching time T2. Initial rotation speed is reached. Thereafter, at time T2, thread switching is performed, and spindle 1
The yarn Y, which has been wound on the upper bobbin, is switched to the bobbin on the spindle 2, and thereafter winding is continued on this bobbin. The spindle 2, which has been subjected to initial speed setting control up to 2 hours, is thereafter subjected to tension control, and the rotational speed gradually decreases as the winding diameter increases, as described above. In Fig. 3, T3 indicates the time when the traverse is changed; slightly after this point, as shown in Fig. C, the spindle 1 is slightly accelerated as shown in the point P, and the traverse reaches the P2 point and the spindle 2 reaches the P8 point. Although there is slack in the curve at the point, this does not affect the winding conditions.

In the present invention, it is important to set the traverse switching time T2 to the required initial rotational speed of the spindle to be switched, which is now controlled, during the thread switching time L.
The reason for this is that before T, the number of rotations of the spindle 2 has not reached the predetermined number of rotations, so the traverse cannot be switched. On the other hand, when the traverse is switched after the yarn switching after T2 is completed and the spindle 2 starts winding, the load of the traverse device is suddenly applied to the motor M2, and the rotational speed of the spindle 2 is temporarily reduced.

In this case, spindle 2 is at the beginning of winding, and GD2 is small, so the decrease in rotational speed due to load fluctuations is relatively large, resulting in a decrease in yarn tension, causing problems such as the yarn wrapping around guides, etc., and winding. Thread switching at such times must be avoided as it may not be possible to continue. When switching the traverse drive system after switching the yarn, the load of the traverse device is suddenly applied to the drive system of the new spindle with a smaller GD2 that has started winding, and the rotational speed of the spindle temporarily decreases. At the same time, there was a problem that the thread tension decreased, but in the present invention, the traverse drive system is switched at a stage before the thread is switched, so the load on the traverse device is suddenly caused by the drive system of the spindle on the full winding side. runs out, and the spindle rotational speed temporarily increases, but when the winding is full, O
Since D2 is large, the change in rotation speed is extremely small.
There is no particular problem in practical use.

After all, in the present invention, since the drive system of the traverse device is switched at the stage of setting the initial speed of a new spindle, the initial speed setting control is performed in a state that includes the load of the traverse device, so that the thread switching At this point, the rotational speed of the new spindle will be precisely controlled.

As a result, the yarn tension can be smoothly switched without the disadvantage that the yarn tension fluctuates, unlike when switching the yarn in a conventional revolving type winder with a constant wind ratio.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing changes in the spindle rotation speed and traverse number of a conventional constant wind ratio revolving winder. FIG. 2 is a drive system diagram of a constant wind ratio revolving winder, and FIG. 3 is a diagram showing changes in the rotational speed of the motor, clutch, spindle, and traverse device in the winder drive method of the present invention. 1, 2... Spindle, 3... Traverse device, 4... Revolving arm, 6, 7, 22
...Intermediate shaft, M, M2...Mode, CL, CL
2...Clutch, P...Package, Y.
... Thread. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. In a spindle-driven revolving type winding machine with a constant wind ratio, when switching from a full winding spindle to a new spindle, the winding machine is driven so that the wind ratio is constant for the full winding spindle. A method for driving a revolving type winding machine with a constant wind ratio, characterized in that the traverse drive system is connected and switched so that the wind ratio is constant with respect to a new spindle, and then yarn switching is performed.