JPH0240577B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a winding method in an automatic winder.

[Conventional technology]

Yarn is wound onto a package which is driven in surface contact by means of a traversing drum. In such an automatic winder, when the rotational speed of the traversing drum and package becomes an integer multiple or a fraction of an integer, the traverse cycle and the package winding cycle synchronize, so that the threads being wound are the same. It happens that they gather in places and overlap each other and wind up like a ribbon.

Therefore, various ribbon winding prevention devices have been proposed in the past. That is, there are various types, such as a type in which the package is mechanically moved relative to the drum to cause a slip, and a type in which the package is wound while applying a brake to the drum.

[Problems to be Solved by the Invention] However, the above-mentioned various ribbon winding prevention devices are always in operation while winding the yarn of the package, and therefore, constantly changing the rotation of the drum or the rotation of the package reduces the production efficiency of the package. This causes a decrease in Alternatively, the more slips occur between the package and the drum during winding, the more damage to the yarn is inevitable.

The present invention aims to solve the above problems.

[Means to solve the problem]

The present invention is an automatic winder that winds a yarn by rotating a package using a traversing drum in surface contact, in which a ribbon breaker operates only in the vicinity of the package diameter where ribbon winding of the package diameter occurs.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for carrying out the present invention will be described below.

In an automatic winder with a large number of winding units installed in parallel, in each winding unit, the thread pulled out from the water supply bobbin travels through a balloon breaker, tensioner, waxing device, slab catcher, etc., and is sent to a traversing drum. While being traversed from side to side, the yarn is wound around a rotating package in surface contact with the drum so as to have a predetermined shape and amount of yarn. The above package is wound up with the winding tube supported by the cradle arm of the unit in a close-in or dual-side manner, and as the amount of winding increases, the gradle arm begins to rotate around a single axis. ing.

FIG. 1 shows an example of an apparatus for carrying out the method of the present invention. Mn is a motor provided independently in each winding unit, and the traverse drum 1 is rotated by the motor Mn. The traverse drum 1 is a known drum, and various wind numbers WD such as 1.5, 2, 2.5, etc. can be applied. cantilever,
Alternatively, it is rotatably supported on both sides.

In the case of this embodiment, the winding diameter indicating member 4 that moves following the pivoting movement of the cradle arm 3 is as follows.
The fan-shaped lever 4 is pivotally supported on one shaft 5. The motion transmitting members 6, 7, 8 between the members 3, 2, 4 are comprised of levers, rods, etc., and can transmit the rotation angle of the cradle arm 3 accurately at the same angle or at the same ratio. Iron pieces t1 to t4 are fixed on the peripheral surface 9 of the fan-shaped lever 4 at a constant pitch, and a detector Sn such as a proximity sensor for detecting the iron pieces t1 to t4 is installed at a predetermined position. In addition,
The positional relationship between the iron piece and the sensor Sn is set so that the iron piece is exactly at the sensor position when the winding diameter d of the package P satisfies the relationship d=D×DW/PW (a). However, D is the drum diameter, DW is the number of winds of the drum, and PW is the number of winds of the package.

For example, in Fig. 1, the diameter D of the drum 1 is
100 mm, and the number of winds WD on the drum is 2, the diameter d of the package cage at which ribbon winding occurs is obtained by substituting the number of winds WP of the package cage 4, 2, 1, 0.5 into equation (a), Dl = 50 mm, d2 =100mm,
d3=200 mm, d4=400 mm, and ribbon winding occurs near each package diameter. Therefore, the winding diameter of the package of the iron piece t1 is d1.
When the sensor Sn is in the operating position, the iron piece t2
is d2, iron piece t3 is d3, iron piece t4 is d
4, each sensor Sn is fixed on the lever 4 so as to be in its operating position.

In addition, regarding the number of winds of package
-~8- Shown in Figures.

When any of the iron pieces t1 to t4 activates the sensor Sn, a signal from the sensor Sn is input to the control circuit Rn of the drum drive motor Mn, and the motor drive current is turned on and off by the circuit shown in the second diagram. It is becoming more and more like this.

In FIG. 2, traverse drum drive motors M1 to Mn provided in each winding unit U1 to Un
are driven from the drive power supply 10 and the main wiring 11 via branch wirings 12a to 12n. A power supply 10 is a control box 1 provided at the end of the winder machine.
3, it is set to a set voltage and serves as a common power source for each motor.

Two-way semiconductor switches, so-called triaxes 14a-14n, are provided in the middle of the branch wirings 12a-12n, that is, in each winding unit U1-Un, and each motor M1-Mn is driven/stopped by turning on/off the triax. do.

Triaxes 14a to 14n of each of the above units
The on/off signal to the main unit is emitted from the pulse signal oscillator 15 provided in the main control box 13, and the pulse signal 16 is sent from the main wiring 17 to the branch wirings 18a to 18n of each unit and the AND circuit A1.
.about.An are input to triacs 14a to 14n. The AND circuits A1 to An are connected to signal lines 19a to 19a from the sensors S1 to Sn of each unit.
19n are connected, therefore sensors S1~
Only when Sn is activated, that is, when the package approaches the diameter where ribbon winding occurs, the triax turns on and off at the set cycle, that is, the non-contact switch opens and closes, and the drive current of motors M1 to Mn is intermittently. flows.

Therefore, for example, in FIG.
Since the diameter D of drum 1 of Un is 100 mm and the number of winds WD is 2, the package diameter is first 50 mm.
Nearby, the iron piece t1 activates the sensor Sn,
As mentioned above, since the motor Mn current is intermittently turned on and off, a slip occurs between the package and the drum, and the thread path of the traversed yarn is dispersed in the package, thereby avoiding ribbon winding. When the package diameter is between 50 and 100 mm, the sensor is placed between iron pieces t1 and t2.
Because of Sn, the signal from the sensor Sn is not input to the AND circuit An in Fig. 2, so the triax 14n continues to be on, the motor current continues to flow, and the motor rotates at a constant speed. The winding speed is maintained.

Next, when the package diameter becomes around 100mm,
As described above, the current of the drum motor Mn is turned on and off again to prevent ribbon winding.

The above states are shown in FIGS. 3 to 6. Figure 3 shows the change in the winding diameter of the package, Figure 4 shows the change in the rotation speed of the drum motor, Figure 5 shows the on/off state of the triax, and Figure 6 shows the on/off state of the sensor Sn. shows. That is, for example, in the vicinity of the ribbon winding diameters d2 and d4, the sensor Sn turns on T2 and T4, causing the triack to turn on a and turn off b, and the rotational speed of the drum motor changes. is the time during which the drum motor speeds up, and this time a is called the up interval, and since the drum motor decelerates during the off period b of the tryout, this time b is called the down interval.

Each of the above-mentioned intervals ab is set by adjustment knobs Va and Vb in the control box 13 of FIG. That is, the up interval a is 0.5 to 2 seconds,
It is desirable to adjust the down interval b within a range of 0.5 to 2.5 seconds. More preferably, when the up interval a is 1.0 seconds or less, the rotation only decreases and the effect of preventing ribbon winding is small, and when the down interval b is 1.8 seconds or more, the effect is small,
For example, if ribbon winding is noticeable when the package diameter is larger than the drum diameter, ribbon winding can be effectively prevented by setting the up interval a to about 1 second and the down interval b to about 1.2 to 1.5 seconds. Also, the reduction rate of the drum rotation speed (Min rotation speed / Max rotation speed x 100) is about 80 to 85%.
Winding efficiency also does not decrease significantly.

Note that the settings for each of the above-mentioned intervals differ within the range of the above-mentioned intervals, since the dispersion angle due to slippage of the generated ribbon, the number of condensed ribbons, etc. differ depending on various conditions such as yarn type, package weight, drum material, contact pressure, etc. It is necessary to actually measure the dispersion angle, number of condensed ribbons, etc. of the generated ribbons by decreasing the up interval a and increasing the down interval b, and to set an interval suitable for the conditions.

Furthermore, the on-times T1, T2, T of the above sensors
As mentioned above, the time T4, ie, the time during which the triax is on and off, is only around the ribbon winding diameter, but the actual times T1 to T4 vary depending on the winding diameter of the package. That is, when the package diameter is small, the ribbon winding diameter passes through the ribbon in a short time, and when the package diameter is large, the time near the ribbon generation diameter becomes longer. Note that the time near the ribbon winding generation diameter becomes longer. Note that the vicinity of the ribbon winding generation diameter is as shown in FIG. 7 and FIG. 7, for example.
That is, if ribbon winding occurs when the package P has a winding diameter of d4, the folded end of the traversing yarn will change from Y1 to Y2 at a winding diameter of d4-α before the winding diameter.
→ As shown in Y3, the distance e moves in the negative direction, and as the winding diameter approaches d4, the distance e approaches zero, and when it reaches zero, the theoretical winding diameter d4 is equal to the drum diameter. It corresponds to when it becomes an integer multiple. This is when the ribbon wrapping becomes most noticeable.
When the package diameter further increases and reaches d4+α, the direction in which the traverse end moves by a distance e becomes a positive direction, contrary to the above, and as the winding diameter increases, the distance e further increases, and the diameter range where ribbon winding occurs It is to escape.

Therefore, in the above embodiment, the ribbon winding generation diameter di
This means that the field in Figures 7-7 is d4-α<di
<d4+α, which means that the tryout is turned on and off only during this period. Note that the above variation α in the yarn layer thickness is based on each ribbon winding diameter d1 to d4.
Assuming that they are approximately equal, the time for winding the thread of the thread layer α is smaller as the winding diameter is smaller, and therefore the time for winding the thread of the thread layer α is different for each ribbon winding diameter. Naturally, it is preferable that the operating time of the triax, ie the time during which the drum motor is changing speed, is also different. For example, in the case of the above embodiment, the time required to wind up a fully wound package is 2 hours, and the ribbon winding diameter d
It is assumed that 1 to d4 are performed four times. If the above α is 5 mm and the yarn speed is approximately 1000 m/min, then the drum motor fluctuation time T1 is 1 minute around the winding diameter d1 and 2 minutes around the winding diameter d2.
The times T1 to T4 are also set differently depending on the difference in the winding diameter, such as 4 minutes around d3 and 8 minutes around d4. Also, the average rotational speed of the drum motor at T1 to T4 above is 85% of the normal rotational speed.
If this is the case, T1+T2+T3+T4, that is, in the above example, winding is performed at 85% of the normal winding speed for 15 minutes, resulting in a decrease in production speed. In other words, if the normal yarn speed is βm/min and the yarn is wound at a constant speed for 2 hours, 120β (m) of yarn can be produced.On the other hand, if the yarn is wound at 85% of the yarn speed for the above 15 minutes, For 2 hours, (0.85β x 15) + 105β = 117.75β
(m), resulting in a slight decrease in production efficiency to 98.1%. Note that if the drum motor is constantly varied during winding, and the average yarn speed is 85%, the production efficiency will naturally decrease by as much as 15%.

The operating times T1 to T4 of the sensors can be easily set by changing the widths of the iron pieces t1 to t4 in FIG. 1, or by electrically using a sequence circuit.

FIG. 9 shows another embodiment for controlling the drum motor. In the embodiment described above, the drum motor was turned on and off by a triax, but in FIG. 9, the rotational speed of the drum motors M1 to Mn is controlled by an inverter. That is, each winding unit U
The drum motors M1-Mn of units 1-Un are connected to a power source 10 via inverters I1-In provided in each unit.
It is connected to the. That is, in each unit, a single motor is driven by an inverter to rotate the traverse drum, and the number of rotations of the drum motor changes by changing the frequency of the inverter. Signals from the sensors S1 to Sn that detect that the winding diameter has reached the vicinity of the ribbon generation diameter are input to the frequency circuits C1 to Cn, which regularly or randomly change the frequencies of the inverters I1 to In, and ~
The rotation speed of Mn changes. Similar to the embodiment described above, the rotational speed of the motor is changed only when the sensors S1 to Sn are acting, that is, only in the vicinity of the ribbon winding generation diameter, as in the case shown in the third diagram. The difference in this case is that in the previous embodiment, the motor rotation speed was passively changed by turning on and off the motor current, but in the case of using an inverter, the current is turned on even during the so-called down interval when the drum rotation decreases. This means that the rotational speed is actively changed. The principle for avoiding ribbon winding in this embodiment is the same as that explained in the previous embodiment, and ribbon winding is prevented by slipping on the package surface due to changes in the number of rotations of the drum.

In the above embodiment, a case was described in which the rotational speed of the drum was changed as a ribbon breaker operation, but of course other ribbon winding prevention mechanisms, such as a type in which the package is mechanically moved relative to the drum as described above, may also be used. Similarly, in the case of the type in which the cradle arm supporting the package is moved up and down periodically or aperiodically to separate and contact the surface of the package with the drum surface, the package is separated only in the vicinity of the package diameter where ribbon winding occurs. By activating the actuating device of the cradle arm so as to bring the cradle into contact with each other, the same effect as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, in the present invention, the speed of the drum motor is increased and decelerated only in the vicinity of the ribbon winding diameter of the package to create a slip between the package and the drum to disperse the yarn path. Ribbon winding can be prevented without reducing unit winding efficiency, ie, yarn production. Furthermore, since the drum motor can be controlled in each unit, detailed ribbon winding prevention operations can be performed in each unit.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing an example of a device implementing the present invention, Fig. 2 is a circuit diagram showing an embodiment of a drum motor control device, and Fig. 3 is a relationship between the winding diameter of the winding package and time. Figure 4 is a diagram showing changes in the rotational speed of the drum motor near the ribbon winding diameter, Figure 5 is a diagram showing the on/off state of the triax, and Figure 6 is a diagram showing the change in the rotation speed of the drum motor near the ribbon winding diameter. Diagrams showing the operation timing, Figures 7 to 7 are schematic explanatory diagrams showing the twill arrangement on the package surface near the ribbon winding diameter, and Figures 8 to 8 illustrate the number of winds of the package. FIG. 9 is a circuit diagram showing another embodiment of the drum motor rotation speed control device. 1... Traverse drum, P, P1-P4... Package, M1-Mn... Motor, 14a-14n...
...triack, di...near the ribbon winding diameter, I
1~In...Inverter.

Claims (1)

[Claims] 1. In a winder that winds yarn around a package that is driven in surface contact by a traversing drum, the traverse drum drive motor is increased or decreased in response to a signal from a detection means that detects the ribbon winding diameter of the package. A winding method in a winder, characterized in that a slip is created between a drum and a thread so that the thread path of the traversed thread is dispersed over a package cage and the thread is wound.