JPS63117877A - Operating method for yarn changeover and winding machine - Google Patents

Abstract

PURPOSE:To lower the cost of a power source by commonly using the converter parts of the inverter devices of plural winding machines and starting them in order at a defined time interval and changing over a yarn. CONSTITUTION:In a changeover and winding machine in which plural bobbin holders are driven by motors 8W1a, 8W1b-8W8a, 8W8b with inverter devices being interposed in between, the operating time and load condition of the inverter device connected to each bobbin holder are considered. And, thus, by commonly using the plural number of converter parts 3 of both of the conventional inverter devices, the capacity of the inverter device can be made approx. 1/2-2/3 the conventional capacity. Also, the installing space for a capacitor 6 for compensating momentary power failure can be made approx. 1/2 the conventional space. And, the capacity and installing space of a regenerative braking resistor 5 can be made approx. 1/10-1/2 those of the conventional one, enabling a power source of low cost. And, by installing plural number of such changeover and winding devices and by starting these at a specified timing in order, a large gain can be obtained.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of operating a yarn switching winder.

More specifically, in the present invention, a bobbin holder equipped with a bobbin is directly driven by a plurality of drive motors via an inverter, and when a predetermined amount of yarn is wound on the bobbin on one bobbin holder, the yarn on the other bobbin holder is The present invention relates to a method of installing a plurality of switching winding machines for switching yarn winding on a bobbin and operating the plurality of switching winding machines.

[Conventional technology]

In conventional switching winding machines, an inverter device is connected to each of a plurality of bobbin holders to control the tension of the winding yarn or the circumferential speed of the package to a predetermined value.

(Problems to be Solved by the Invention) When a plurality of such switching winders are installed and operated, the following problems occur in the prior art.

■ An inverter device is required for each motor that drives multiple bobbin holders, requiring a large installation space and increasing costs. In other words, among multiple inverter devices,
Despite the fact that half of the
As shown in the figure and FIG. 6, twice as many inverter devices (capacity is assumed to be C) as the number of switching winding machines are required.

■ Also, in order to compensate for the power supply in the event of a momentary power outage,
A capacitor is required for each of the plurality of inverter devices, and the installation space for the capacitor is large, resulting in high cost. That is, as shown in FIG. 6, in order to compensate for the current C, twice as many capacitors as the number of switching winding machines are required.

■ When regeneratively braking the drive motor via an inverter device when stopping the bobbin holder, a regenerative resistor is required for each inverter device, requiring a large installation space and increasing costs.

Means for Solving Problem C] In the present invention, the spindle-driven switching winding machine has a plurality of bobbin holders, and when the yarn wound on one bobbin holder reaches a predetermined amount, the yarn is wound on another bobbin holder. The yarn is sequentially switched, a plurality of drive motors are connected to a plurality of bobbin holders, the drive motors are connected to an inverter device consisting of a converter section and an inverter section, and the spindle drive type In the method of operating a plurality of switching winding machines, the inverter section of the inverter device that drives the plurality of drive motors is connected in parallel to correspond to the plurality of drive motors of the plurality of switching winding machines. It is composed of a plurality of inverter sections, and one converter section is provided in common to the plurality of inverter sections, and the plurality of winding machines are sequentially started at a time interval T shown by the following equation (1). However, the above-mentioned problem is solved by a method of operating a switching winding machine for yarns such that the starting times of the drive motors of the plurality of switching winding machines do not overlap to switch the threads.

■8≦T≦To −Us /U”' (1) Here, T
S: Start-up time of the drive motor To = Predetermined main winding time u8: Number of winding machines that are started at the same time U: Number of winding machines that share the converter section of the inverter device.

Further, in the present invention, it is preferable that the capacitance 2 of the converter section of the inverter device satisfies the following formula (2).

Us II +LI (II +12)/2≦7<2
u12...(2) Here, uS: Number of back-side bobbin holders activated at the same time when switching U: Number of winding machines that share the converter section of the inverter device 11: Winding in one winding machine Starting current ■2: End-of-winding current in one winding machine.

Further, in the present invention, when providing a momentary power failure compensation function or a regenerative braking function, a compensation capacitor or a regeneration resistor is commonly connected to a plurality of inverter units.

[Function] In a switching winder in which a plurality of bobbin holders are driven by a motor through an inverter device, by focusing on the operating time of the inverter device connected to each bobbin holder and the state of its load, By making the converter part of both conventional inverter devices common to multiple units,
The capacity of the inverter device is 1/2 to 2/3 of the conventional capacity
Moreover, the installation space for the instantaneous power failure compensation capacitor is reduced to about 1/2 that of the conventional one.

Furthermore, the capacity and installation space of the regenerative braking resistor can be reduced to about 1/10 to 1/2 of the conventional one, providing a low-cost power source.

Moreover, even when a plurality of such switching winders are installed, the above-mentioned advantages can be fully exhibited by sequentially starting them at specific timings as in the present invention.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to Examples. Fourth
The figure is a front view of a turret type automatic switching winding machine with a circumferential speed of Φ11 according to the present invention. is two bobbin holders 11a and 1
1b is rotatably supported. The bobbin holder 11
a, 11b are each drive motor 8W+ a18W+
b (see Figure 1), and is rotated at a predetermined speed.

The traverse device 14 includes a traverse guide (not shown) that traverses the yarn 17 from side to side.

The contact roller frame 15 includes a bobbin holder 1.
The package 1 is brought into contact with the bobbin mounted on the bobbin 1a111b or the package 18 formed on the bobbin.
A contact roller 16 for measuring the circumferential speed of 8 is rotatably mounted. The traverse device 14 and the contact roller frame 15 can be moved up and down relative to the turret table 13.

In the conventional automatic switching winding machine, as shown in FIG. 5, an inverter device consisting of converter sections 3W+a, 3w, b and inverter sections 7Wla, 7WIb connects each drive motor 8W+a.

Connected to 8W+b. In addition, relay 1W1a, I
W + b is for powering on, fuse 2W + a
% 2 W + b is connected in series. The contacts of relays 4w1 a, 4w, and b are closed several seconds after relay 1w1 811W+b is turned on, and relays 4wl a,
4W + b The rush current immediately after the official is resistor 5W + a,
This is prevented by using 5W+b.

In conventional automatic switching winding machines, an inverter device is installed for each drive motor, which requires a large installation space, and the capacity of both inverter devices is set to withstand the maximum load in the steady winding state. The equipment cost is high.

Furthermore, as shown in Fig. 6, in the conventional automatic switching winding system, when an attempt is made to consume the regenerative energy generated when braking the drive motors Bw, a, Bw+b, the generation of regenerative energy is detected and the regenerative energy is detected. Switching transistor 10W+a.

It is necessary to install 10W+b and regenerative resistors 9w, a, and 9W+b in each inverter device, which requires a large installation space and is expensive.

In addition, capacitors 6W+ a and 6W+ b, which compensate for a few seconds when a momentary power outage occurs, and also compensate when starting the drive motor or other overloads, must also be installed in each inverter device, requiring a large installation space. Equipment costs are high.

The load characteristics of a spindle-driven switching winder are
It is as shown in Figure-a.

Drive motor 8W connected to one bobbin holder 11a
Focusing on +a, when starting the drive motor, the normal 2 to 3
A starting current of double IO (not shown) flows for a short time, and after a starting time TS of the drive motor, a steady winding state is reached. At this time, the package 18 formed on the bobbin mounted on the bobbin holder 11a is small, and therefore the current 1 at the beginning of winding has a small value. As the package 18 on the bobbin attached to the bobbin holder 11a becomes thicker,
The drive current of the drive motor 8Wla increases along the curve A+, and reaches the maximum drive current 12 when the package reaches a predetermined winding amount in one day.

When this state is reached, the other drive motor 8WIb is started, and when the speed of the bobbin holder 11b is increased to a predetermined speed, the yarn is wound from the bobbin holder 11a to the bobbin holder 11.
b, and continues winding the yarn 17. The drive motor 8W+b exhibits a load characteristic B+ similar to the load characteristic A1 of the drive motors 8w and 8a.

In the conventional switching winder, each drive motor is 8W, a, 8W+t.
) are each connected to an inverter device, and each inverter device has a capacity (C in FIG. 2) that can individually cover the drive current of each drive motor 8W+8.8W+b. The capacity of one inverter device is small, but when looking at each switching winder, there are two inverter devices, so a capacity of 2C is required.

The present inventor discovered that when one bobbin holder 11a is fully wound and the load current 12 of the drive motor 8W+a is the maximum, the other winding machines 8w and 8b are in the winding start state and the load current 11 is the minimum. The characteristic peculiar to the switching winder is that
When operating multiple winders, some inverters are in operation but the remaining inverters are in a dormant state. The converter part is common, and the drive motors of multiple bobbin holders each have an inverter part.
By sequentially starting a predetermined number of winding machines (Us machines) to switch the yarn from one bobbin holder to the other, the capacity of the converter section of the inverter device and momentary power outage compensation can be improved. It is possible to significantly reduce the capacity of the regenerative braking resistor, and the capacity of the braking regenerative resistor is equal to the number of vehicles that can be switched at the same time (in this example, one vehicle).
It has been found that by doing so, the cost and installation space of the switching winder can be significantly reduced.

In the present invention, as shown in FIG.
, 7w6b is each drive motor 8W+a.

8W1b to 8W8a and 8w6b, but on the other hand, the converter section (DC section) 3 of the inverter device
is re-drive motor 8W+ a, 8W+ b~8Ws a,
One unit is commonly installed in 8Ws b.

The capacity of the converter section 3 is the total number of operating winding machines 1 (in this example, u = 8 units) and the number of simultaneously activated bobbin holders on the back side at the time of switching, US (in this example, us = 1 unit).
, the maximum load I2 in the steady winding state of either bobbin holder 11a or 11b, and the load I+ at the start of winding in the steady state of the other bobbin holder 11b or 11a, the inverter capacity 2 is Us It +u (It +I2)/2≦Z<2u
It is set in the range of I2.

Note that a known inverter device such as one using a transistor or a thyristor in the inverter section can be used.

In Figure 1, when relay 1 is closed, motor 8W +
The contact roller 16 is brought into pressure contact with the package 18 wound up on the bobbin holder 11a driven by the rotation speed 51a. Pl ml] control is performed by

That is, the converter section 3 of the inverter device converts alternating current into direct current, and the control circuit (not shown) controls the inverter section 7W+a to convert the alternating current to a predetermined frequency, and the motor 8W+8 moves along the line in FIG. 2-a. It is driven along A1.

Next, after a predetermined period of time has elapsed in the winding machine W2, the inverter section 7w2a is controlled to convert the alternating current to a predetermined frequency, and the drive motor 8W2a is driven along It A 2 in FIG. 2-a. Ru.

Thereafter, drive motors W3a to W8a are sequentially driven at predetermined time intervals in the same manner.

-1A- In this embodiment, the time interval at which this winding machine is started is the time period obtained by equally dividing the time To until the switching winding machine W+a completes winding, and the winding machines w2 a to wB a are started sequentially.

When the number of packages 18 wound on the bobbin holder driven by the drive motor 8W+a of the winding machine W1 reaches a predetermined amount, the drive motor 8W controlled by the inverter sections 7w and b,
Switch the yarn by driving the bobbin holder driven by b.
Drive along line 81.

Next, the rotational speed of the motors 8W and a that drive the bobbin boulder 11a is reduced at a predetermined gradient, and a brake is applied to the motor 8Wla. When motor 8W+a decelerates, back power is applied from motor 8W+a to converter section (DC section) 3 of the inverter device. This back power is detected by a detector (not shown), and the transistor 10
This prevents the inverter from tripping or being damaged by switching and consuming energy in the resistor 9.

Energy is similarly consumed by the resistor 9 when braking the motors 8w and 8b.

Thereafter, similarly, the drive motor 8W2b is sequentially operated at predetermined time intervals.
~ Drive F3wB b, switch yarn, line 82 ~ B8
A drive motor 8 is driven along the bobbin holder and is connected to the bobbin holder.
A brake is applied to Wla to 8W+a, and back power is consumed by the resistor 9 during braking.

Note that when starting the drive motor, the current value is approximately twice the normal value due to starting, but this is compensated by the capacitor 6.

If a momentary power outage occurs while winding up the package 18, the electricity stored in the capacitor 6 (a storage battery may be used instead of the capacitor) will be gradually discharged, causing the drive motors 8W1a to 8Waa or Bw, b to 8w6b to Driving continues. Next, in order to prevent an inrush current from occurring and damaging the transistor 1 when the power is restored, a resistor 5 is provided so that the current gradually flows into the resistor 5.

Further, when a momentary power outage occurs, the control circuit of the inverter device, the speed control circuit relay 1, etc. are backed up by a capacitor or a capacitor (not shown), as described above.

In the above embodiment, the drive motor is activated once at predetermined equal time intervals.
Although the devices are activated one by one, the time intervals may be set at irregular intervals, or a plurality of devices (LJs) may be activated at the same time. In Figure 2-b, the number of winding machines U is 8.
An embodiment is shown in which the number u8 of winding machines started simultaneously is two.

In addition to the bobbin holder drive motor of the winding machine, the converter unit may also include a traverse device drive motor and an inverter device such as a feed roller (godet roller) upstream of the winding machine. In that case, All you have to do is add up the capacity required for each device.

〔Effect of the invention〕

■ In the present invention, the DC section, that is, the converter section of the inverter device of a plurality of winding machines is common, and the converter section is activated sequentially at predetermined time intervals, so that the capacity of the converter section is within the range shown by equation (2) below. The capacity can be reduced to about 1/2 of that of conventional equipment, and costs can also be reduced.

LJs I+ +u (11+I2)/2≦7<2u
12...(2) ■ Since the converter section of the inverter device of multiple winding machines is common and braking is performed sequentially at predetermined time intervals, the capacity of the resistor that consumes energy when decelerating a fully wound package is , the capacity is equivalent to the number of winders that are decelerated at the same time.
It can be made 1/2 to 1/10 of the conventional size, and space costs can also be reduced. Furthermore, since the regenerated energy during braking can be used as energy by the other motor in operation, there is an effect of energy saving, and there is also the advantage that the capacity of the resistor can be reduced.

(2) The instantaneous power failure capacitor needs to prevent a complete voltage drop for, for example, 0.06 seconds, and requires 1 to 1.5 times the space of the inverter device. In the present invention, the capacity of the converter section is the same as the capacity of multiple winding machines that are operated at the same time, and the installation space and cost can be reduced to about 1/2 of the conventional one. be.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an inverter device of a yarn switching winding machine embodying the present invention, and Fig. 2-a shows the current value when the bobbin holder is operated by a motor in a turret type automatic switching winding machine. 2-b is a current value diagram according to another embodiment, and FIG. 3 is a circuit diagram of an inverter device incorporating a regenerative braking function and an instantaneous power failure compensation function for carrying out the present invention. , Fig. 4 is a front view of a turret type automatic switching winding machine implementing the present invention, Fig. 5 is a circuit diagram of a conventional inverter device, and Fig. 6 is a regenerative braking function and instantaneous power failure compensation in the conventional method. FIG. 2 is a circuit diagram of an inverter device incorporating functions. 1...Relay, 2...Fuse, 3.
...Converter section, 4...Relay, 5...Resistor, 6...Capacitor, 7Wl a, 7
W1 b~7W2 a, 7wg b...Inverter section, 8WI a, 8W+ b~8Wa a-8We b
...Motor, 9...Resistor, 10...Transistor.

Claims (1)

[Claims] 1. A spindle-driven switching winding machine has a plurality of bobbin holders, and when a predetermined amount of yarn is wound on one bobbin holder, the yarn is sequentially switched to other bobbin holders. A plurality of drive motors are connected to a plurality of bobbin holders, and the drive motors are connected to an inverter device consisting of a converter section and an inverter section, and a plurality of spindle drive type switching winding machines are connected to each other. In the operating method, the inverter section of the inverter device that drives the plurality of drive motors includes a plurality of inverter sections connected in parallel corresponding to the plurality of drive motors of the plurality of switching winding machines. one converter unit is provided in common to the plurality of inverter units,
A method for operating a yarn switching winding machine, characterized in that the plurality of winding machines are sequentially started at time intervals T shown by the following formula (1) to switch yarns. T_S≦T≦T_0・u_S/u…(1) Where, T_S: Start-up time of the drive motor T_0: Predetermined amount of winding time u_S: Number of units started at the same time u: Winding machines that share the converter section of the inverter device 2. The method for starting a yarn switching winding machine according to claim 1, wherein the number of units is 2 and the capacity Z of the converter section of the inverter device satisfies the following formula (2). u_SI_1+u(I_1+I_2)/2≦Z<2uI
_2...(2) Here, u_S: Number of winding machines that start up the backup side bobbin holders at the same time when switching. u: Number of winding machines that share the converter section of the inverter device. : Switchable winding of yarn according to claim 1 or 2, wherein a winding end current 3 in one winding machine and a capacitor for compensating for instantaneous power failure are commonly connected to the plurality of inverter units. How to operate the removal machine. 4. Claim 1, 2 or 3, wherein a regeneration resistor is commonly connected to the plurality of inverter units.
How to operate the yarn switching winder described in Section 1.