JPS6033749B2 - How to operate a revolving type winder with constant wind ratio - Google Patents

Description

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

More specifically, the present invention provides an operating method for stabilizing the winding position of a yarn wound on a new bobbin when switching the yarn of a revolving type winder that winds at a constant wind ratio. As is well known, when winding machines are classified based on the driving method of the traverse device, the following two methods can be mentioned.

1. A method of driving the spindle and traverse device using the same drive source.

2. A method of independently driving the spindle and traverse device using separate drive sources.

First, the first method is called a constant wind ratio method because the ratio (wind ratio) between the number of revolutions of the spindle and the number of traverses is always constant.

On the other hand, in method 2, the number of traverses is usually almost constant regardless of the rotational speed of the spindle, so the thread angle on the package is wound at a nearly constant angle. This is called the constant winding method.

Since the constant winding winding method uses a simple driving yarn, this method has been adopted in most revolving type winding machines having a plurality of spindles.

However, as is well known in the constant winding winding method, the thread paths on the package overlap at the winding diameter where the spindle rotation speed and the traverse number are a simple integer ratio, so-called ribbon winding. This has the disadvantage that the formation of a normal package is inhibited. In order to eliminate this ribbon winding, various methods have been proposed, such as a method of constantly changing the number of traverses minutely.
For winding pongee threads, it has become possible to eliminate the problem to the extent that there is almost no actual damage, but for winding large threads, where the negative effects of ribbon winding are noticeable, bon winding is still effective. The reality is that there is no solution. On the other hand, in the constant wind ratio winding method, ribbon winding does not occur, so it is a method preferably used for winding large yarns, etc. However, in this case, another problem occurs as described below.

In other words, in the constant wind ratio winding method, as the diameter of the package increases and the number of rotations of the spindle decreases, the number of traverses also decreases in proportion to this, so the winding angle of the yarn on the package also decreases. .

For example, if the full tube diameter is made 4 times the bobbin angle, the wind angle at full tube will be approximately 1'4 of the winding angle at the beginning of winding, and if the initial traverse number is not very high, the wind angle will almost disappear. This makes it impossible to wind up the package properly. Loss of wind angle on the package may cause the surface layer to collapse easily, or the surface fiber layer may get into the lower layer fiber layer, making it difficult to unravel the package or partially changing the fiber properties. Change will come. In order to avoid the above-mentioned problem, if the number of traverses at the beginning of winding is increased, the winding angle is too large at the beginning of winding, causing the thread wound on the bobbin to slip toward the center of the winding.

When the thread moves toward the center of the bobbin in this way, the thread wound around the bobbin gradually loosens and expands as a lump in the center of the bobbin, making continuous winding impossible. It is. This thread slipping phenomenon occurs instantaneously and affects other winding machines, so it must be reliably prevented. Ultimately, what is desired is a winding method that prevents the thread from slipping on the bobbin at the beginning of winding and provides a sufficient winding angle at the end of winding (full winding).

Furthermore, by realizing this, it is possible to form a package with a large diameter. The present invention was obtained in order to eliminate the drawbacks of the prior art, and is a spindle drive type revolving type winder that maintains a constant wind ratio. When changing, the traverse drive system that was driven so that the wind ratio was constant for the spindle on the full tube side was switched after the thread change, so that the wind ratio was constant for the new spindle. It is characterized by causing a great uproar.

Embodiments of the present invention will be described below with reference to the drawings.

Basic configuration of a reporting type winding machine First, in FIG. 1, numeral 2 is a spindle, and 3 is a traverse device.

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

Spindles 1 and 2 are rotatably supported at both ends of a volving 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. When it comes to tubes, the resolving arm 4 is rotated 1800 times by a revolving drive mechanism (not shown), and the spindles 1 and 2 are configured to change their positions with respect to each other. A hollow intermediate shaft 6 is rotatably supported at the center of the revolving arm 4 (the position is changed in the vertical direction in the figure), and furthermore, at the center of this intermediate shaft 6,
A further intermediate shaft 7 is rotatably supported.

That is, the revolving arm 4 and the intermediate koji 6, 7 are
It is constructed with three axes having the same center, and each shaft is supported so that it can rotate independently of the others. Drive system of the revolving winder The drive system of the spindles 1, 2 and the traverse device 3 are all composed of timing pulleys (hereinafter abbreviated as pulleys) and timing belts (hereinafter abbreviated as belts).

First, the spindle drive system will be explained. 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 IQ, and further via the pulley 11 and belt 12 to the spindle 1. The rotation is transmitted to the pulley 13 at the end to drive the spindle 1. Similarly, M2 is a drive motor for the spindle 2, and its rotation is transmitted from the pulley 14 at the end of the vehicle to the belt 15, pulley 16, intermediate shaft 7, Pulley 17, belt 1
8, the signal is transmitted to a 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, the motor M has a traverse drive shaft in addition to the spindle drive pulley 8. - IJ20 is installed and motor M.
The rotation of the pulley 2 is performed via this pulley 20 and the belt 21.
2. 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. Similarly, a pulley 27 for driving the traverse is attached to the motor base, and the rotation of the motor M2 is transmitted to the clutch CL via the pulley 27, belt 28, and pulley 29, and the operation of the clutch CL2 is transmitted to the clutch CL. Sometimes additionally, ball 23, pulley 24, belt 25, 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
}, 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,
The wind ratio can be kept constant in the same manner as described above by turning off the clutch CL2 and operating the clutch CL2. Method of operating a revolving type winder The present invention provides the revolving type winder as exemplified above.
The feature is that the traverse drive system is switched after the thread switching operation.

In other words, the thread is switched when the number of traverses is decreasing, and after winding the thread to the extent that the thread does not slip on the bobbin, the traverse drive system is switched and the number of traverses is increased and the thread is wound at the beginning of winding. This prevents the layers from slipping. Now, a method of operating a revolving winder having the drive system detailed above will be explained.

Figure 2 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 1 at a constant wind 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 pipe width 2 approaches, motor M2 starts rotating in preparation for thread switching, spindle 2 starts running, reaches the initial required rotation speed at time T, and continues until Tokicho 2. The condition continues.

During this time, the revolving arm 4 rotates 1800 times, and the spindle 1, which is fully loaded, is placed in the service position, and the spindle 2, which has completed its run-up, is placed in the winding position.
When the tube is full, the yarn Y that has been wound around the spindle 1 is switched to the spindle 2 by an appropriate yarn switching means (not shown), and the yarn is then wound around the spindle 2.

In a normal revolving type winding machine, when the yarn switching is completed, the motor M is immediately stopped and the spindle 1 that has finished winding is stopped, but in the method of the present invention, after the yarn switching time T2. , motor M for a suitable time △T
, continues to rotate.

At time T3, which is ΔT time after the thread switching time UT2, the clutch CL is disengaged, the clutch CL2 is activated, and the motor M is stopped. As described above, by delaying the clutch switching timing from the thread switching time T2, the time T2 when the spindle 2 starts winding is changed to △T.
During this time, the spindle 2 winding the yarn is rotated by the motor, and the traverse device 3 is driven by the motor M. Therefore, even though the spindle 2 is rotating at a high rotational speed at the beginning of winding, the traverse device 3 continues to perform a low traverse number when the tube is full, so the tube is full during this ΔT time. It will be wound with the same small winding angle as the time. Next, the clutch is switched at time m3, so from this point on, both the spindle 2 during winding and the traverse device 3 are operated by the motor M.
2, and the yarn Y is again wound at a constant wind ratio.

After that, at time T2', spindle 2 becomes full and the yarn is switched from spindle 2 to spindle 1, but the procedure is almost the same as the switching from spindle 1 to 2 described above, so the explanation will be omitted. .

Note that the time interval ΔT between the yarn switching timing and the traverse switching timing may be approximately the time required until the surface layer of the bobbin is normally completely covered with the wound yarn.

The reason for this is that the friction coefficient between the thread and the thread layer is usually higher than the friction coefficient between the thread and the bobbin surface, so the thread tends to slip on the bobbin. This is because thread slippage hardly occurs when the thread no longer touches the bobbin surface.Therefore, ΔT time of several seconds is usually sufficient.In order to eliminate thread slippage more completely,
When taking a long time ΔT, it can be extended until just before the first ribbon winding appears when the number of traverses is continued with a full tube.

As described above, the present invention is characterized in that the traverse device is driven so that the wind ratio is constant after the yarn is switched from a full bobbin to an empty bobbin, and the following effects can be obtained accordingly.

m The package formed by the winding method of the present invention is wound at the same small winding angle as when the package is full during the ΔT time at the beginning of winding, and thereafter is wound at a constant wind ratio.

For this reason, it is possible to eliminate the slipping phenomenon that occurs in the conventional constant winding ratio winding method, where the thread at the beginning of winding slips on the surface of the bobbin and becomes loose, and prevents thread switching from failing. It is possible to prevent a large amount of defective yarn from being generated. {2] Therefore, it is possible to set the number of traverses higher than in the conventional fixed wind ratio method, and it is possible to create a large package.

{3} The package obtained by the present invention has a constant wind ratio and does not generate ribbon winding.

In the above embodiments, the drive systems of the spindle and the traverse device are mechanically connected to each other in order to realize a constant wind ratio, but the invention may be modified without departing from the technical idea of the present invention. Other embodiments may also be used, for example, a configuration in which both are coupled by an inverter or other electrical means may also be used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a drive system diagram of a revolving winder for carrying out the method of the invention.

FIG. 2 is a diagram showing changes in rotational speed and operating states of the motor, clutch, spindle, and traverse in the method of the present invention. 1, 2... Spindle, 3... Traverse device, 4... Revolving arm, 6, 7, 23...

Intermediate shaft, M,, M2...Motor, CL, CL2...
...Clutch, P.../f cage, Y...
・Thread. Figure 1 Figure 2

Claims (1)

[Claims] 1 In a spindle-driven revolving type winder that winds while keeping the wind ratio constant, when switching yarn from a full spindle to a new spindle, the wind ratio changes with respect to the full spindle. A revolving type winding with a constant wind ratio, characterized in that the traverse drive yarn, which has been fastened so as to be constant, is switched to a new spindle so that the wind ratio is constant after the moment of yarn switching. How to operate the machine.