JPH09165140A - Control method for automatic switching type winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten time required to move a turret member and perform start- stop action without shock by controlling the rotation of an induction motor for driving the turret member, by an inverter. SOLUTION: When a package 50 in the course of winding reaches the set quantity, an induction motor 8 of a spindle 6 in a doffing position (stand-by position) is driven by an inverter 22. When the rotating speed of the spindle 6 reaches the set value, an induction motor 12 of drive mechanism 4 is driven by an inverter 24, and a turret member 2 starts its rotation. When the turret member 2 reaches the set high speed rotating speed, the frequency to the induction motor 12 is switched from a high speed frequency state to a speed reducing frequency state by the inverter 24 so as to reduce the rotating speed of the turret member 2. Upon the lapse of the set time, the turret member 2 is fixed into a specified position, and power supply to the induction motor 12 is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for an automatic switching type winding machine that continuously winds a yarn spun from a spinning machine.

[0002]

2. Description of the Related Art Generally, in the case of continuously winding a yarn spun from a spinning machine, a turret member rotatably or movably installed on a machine frame and rotatably mounted on the turret member. A turret type winder configured by a plurality of saliva tube mounting spindles and a traverse mechanism installed on the upstream side of the tube mounting spindles is used.

In order to reduce the amount of waste yarn generated in the yarn switching operation of the turret type winding machine, it is necessary to shorten the yarn switching time from the full winding package to the empty tube.

To this end, it is necessary to increase the speed at which the empty tube mounting spindle in the doffing position is moved to the yarn switching position and the full-winding package mounting spindle in the winding position is moved to the doffing position.

In the conventional method of bringing the spindle into contact with the stopper to stop it, when the spindle is moved at a high speed, the shock at the time of stoppage becomes large and the package collapses, or the spindle vibrates and the bearing part is deformed. There is a problem that the empty tube may collide with the contact roller at a high speed and damage the tube.

In order to solve such a problem, for example, a plurality of electric motors for driving a turret member as described in Japanese Utility Model Laid-Open No. 7-9867 are installed and the rotational speeds of the electric motors are different. Then, a method has been proposed in which the rotating speed of the turret member is changed by sequentially switching the electric motors.

Further, a method of changing the rotation speed of the turret member by switching the number of poles of the electric motor for driving the turret member has already been implemented.

[0008]

In each of the above methods, the rotation speed at the time of stop can be slowed down, but since the speed is rapidly switched, the speed is switched to the low speed and the high speed driving is started. Sometimes there is a big shock and the high / low speed ratio cannot be increased. That is, there is a problem that the speed at the time of high speed cannot be increased so much and the yarn switching time cannot be shortened significantly.

Further, since the commercial power source is used as the power source of the electric motor for driving the winding machine, the frequency is 50 Hz and the frequency is 60 Hz.
The speed will be different by 20% from that of the area, so the thread switching operation time will change, and the setting of the timer etc. of the sequence that controls the operation of the thread switching mechanism will be 50Hz.
There is a problem in that it is necessary to make fine adjustments between the area of 60 Hz and the area of 60 Hz.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control method for an automatic switching winder which can reduce the time required to move a turret member and can carry out a start-stop operation without impact.

[0011]

In order to solve the above-mentioned problems, the turret type winding machine of the present invention has a structure in which an induction motor for driving a turret member is rotationally controlled by an inverter.

Further, as in claim 2, regenerative braking can be applied during deceleration operation of the induction motor.

[0013]

1 is a schematic view showing an embodiment of the structure of a winding machine for carrying out the control method for an automatic switching type winding machine according to the present invention. The winding machine is a machine frame. 1 includes a turret member 2 rotatably mounted on a bearing 3 by a bearing 3, a drive mechanism 4 for intermittently rotating the turret member 2 at a predetermined angle, and induction motors 7 and 8 for driving. Tube mounting spindles 5 and 6 rotatably attached to the machine, a movable frame body 9 that vertically moves up and down along a guide rod formed on the machine frame 1, and an induction motor 1 for driving.
1, a contact roller 10 rotatably attached to the movable frame body 9, a traverse device (not shown) integrally attached to the movable frame body 9, and rotation of the turret member 2. The control unit 20 controls the rotation speeds of the spindles 5 and 6.

The drive mechanism 4 described above includes an induction motor 12 mounted on the machine frame 1, a sprocket 13 mounted on the output shaft of the induction motor 12, a sprocket 24 mounted on the turret member 2, and the sprocket 13. 1
It is constituted by a chain 15 which is stretched over the four.

A fixing hole or a protrusion (not shown) is formed in the turret member 2 described above, and a stopper pin or a hook member attached to the piston rod of the fluid cylinder 16 installed in the machine frame 1 is formed. 17 are adapted to be engaged.

An electromagnetic cylinder may be used in place of the fluid cylinder 16.

Further, in the vicinity of the turret member 2, a detector 18 for detecting projections or holes (not shown) formed at a predetermined interval on the peripheral surface of the turret member 2 is installed. The rotation position of the member 2 is detected and sent to the control unit 20.

A rotation detector (not shown) is provided near each of the spindles 6 and 7 and the contact roller 10, and a detection signal from the rotation detector is sent to the control unit 20. .

The control unit 20 described above includes induction motors 7, 8, 1
1 and the induction motor 12 of the drive mechanism 4 are provided with inverters 21, 22, 23, 24 for supplying a predetermined frequency, a control device 29 for sending control signals to these inverters, and an input means 30 such as a keyboard. ing.

The above-mentioned inverters 21, 22, 23, 24
Is provided with regenerative braking resistors 25, 26, 27, 28 for consuming regenerative electric power at the time of regenerative braking, and an AC power supply 31 is connected thereto.

These inverters 21, 22, 23, 2
4 has a DC braking function capable of switching from regenerative braking to DC braking in a predetermined low speed range.

The control device 29 described above includes a main control unit 29a for performing speed control and sequence control, and a braking control unit 29b.
And a changeover switch 29 for changing over from speed control to braking control
c, 29d, 29e, 29f, input function, storage function,
Microcomputer or programmable logic controller P having comparison calculation function, operation command function, etc.
It is composed of LC and.

The changeover switches 29c, 29d, 29
Circuits e and 29f are switched based on a switching signal from the main controller 29a.

Various operating conditions are inputted in advance to the control device 29, and these conditions and the detection signal values from the respective rotation detectors (not shown) and the detector 18 are compared and calculated to calculate the induction motor. A control signal is supplied to the inverters 21, 22, 23 and 24 so as to output a predetermined frequency to 7, 8, 11, and 12.

The above-mentioned movable frame 9 is supported by a fluid cylinder 19 for controlling the contact pressure between the tube 40 mounted on the spindle 6 and the contact roller 10.

A pressure air supply pipe (not shown) having a pressure control valve and an electromagnetic switching valve in the fluid cylinders 16 and 19 described above.
Are connected to each other and supply compressed air to each of the fluid cylinders 16 and 19 based on an operation command signal from the control device 17.

A pressure control device such as an electropneumatic converter may be used in place of the above-mentioned pressure control valve.

When the yarn is wound in the above-mentioned turret type winder and the package 50 being wound reaches a preset amount, the induction motor 8 of the spindle 7 in the doffing position (standby position) It is driven by the inverter 22.

When the number of rotations of the spindle 7 reaches a preset value, the stopper pin 17 withdraws together with the piston rod of the fluid cylinder 16 and the turret member 2
Detach from the hole.

Then, the induction motor 12 of the drive mechanism 4 is driven by the inverter 24 and the turret member 2 starts rotating.

Then, when the turret member 2 reaches a preset high-speed rotation speed from the stopped state and the rotation amount detected by the detector 18 reaches a preset value,
An operation signal is sent from the main control unit 29a to the braking control unit 29b, and at the same time, a switching operation signal is sent to the changeover switch 29f, so that the control command circuit for the inverter 24 becomes the main control unit 2
9a is switched to the braking control unit 29b, and the braking control unit 2
The frequency of the induction motor 12 from the inverter 24 is switched from the high speed frequency state to the deceleration frequency state based on the regenerative braking control value previously input to 9b, and the rotational speed of the turret member 2 is reduced.

When the preset low speed frequency is reached and the preset time elapses, the fluid cylinder 1
The stopper pin 17 projects with the piston rod 6 and engages with a hole formed in the turret member 2 to be fixed to the turret member 2 at a predetermined position. Simultaneously with the fixing operation of the turret member 2, the supply of electric power to the induction motor 12 is stopped.

A yarn switching mechanism (not shown) is activated during the rotation deceleration of the turret member 2 or after the rotation is stopped to switch the yarn from the fully wound package 50 to the empty tube 40.

The switching of the frequency from the inverter 24 to the induction motor 12 for driving the turret member (starting from the stopped state to the high speed rotation speed and decelerating from the high speed rotation speed to the low speed rotation speed) is performed in advance. It is performed according to the set time and slope (a slope, a straight line, a curved line, a polygonal line, or the like can be selected).

The power supply to the induction motor 12 is stopped at the time when the operation of the stopper pin 17 is confirmed or when the preset rotational position of the turret member 2 is detected.

When the turret member 2 is accelerated or decelerated with a preset inclination for switching from the stopped state to the high-speed rotation state and switching from the high-speed rotation state to the low-speed rotation state, these acceleration and deceleration Can greatly reduce the shock of.

Therefore, if the low speed rotation speed of the turret member is made equal to that of the conventional system (pole switching system or induction motor switching system) as shown in FIG. However, when the induction motor that drives the turret member 2 is controlled by an inverter and regenerative braking is applied, the high-speed rotation speed of the turret member is significantly increased as shown by the solid line (a) in FIG. As a result, the deceleration time can be shortened, and as a result, the rotation time of the turret member can be shortened to half or less.

Further, the inverter 2 in the above-mentioned embodiment
The control signal from the main control unit 29a is sent to the inverter 24 even during deceleration without providing the regenerative braking resistor 28 of No. 4 and the changeover switch 29f in the control unit so that the regenerative braking is not applied during the braking operation. In this case, as shown by the dotted line (b) in FIG. 2, the deceleration time takes a little longer, but the rotation time of the turret member can be reduced to about half.

The control method of the present invention is disclosed in, for example, Japanese Patent Laid-Open No. 5-16.
A plurality of turret members that move along a guide member as described in Japanese Patent No. 2925 are provided with spindles, and the turret members are sequentially moved from a winding position to a doffing position and from a doffing position to a yarn switching position ( It can also be applied to an automatic switching type winding machine configured to be moved to a winding position).

[0040]

The turret type winding machine according to the present invention is described in claim 1.
Since the rotation of the induction motor for driving the turret member is controlled by the inverter as described above, it is possible to move the turret member at a high speed without causing an impact at the time of the start-stop operation and to rapidly decelerate the turret member. The time required for movement can be shortened. Therefore, it is possible to reduce the amount of waste yarn generated when switching yarns.

When the induction motor for driving the turret member is decelerated as described in claim 2, the deceleration time can be further shortened by applying the regenerative braking.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a configuration of a turret type winder for carrying out a control method for an automatic switching winder of the present invention.

FIG. 2 is a schematic diagram showing a state of rotational speed of a turret member.

[Explanation of symbols]

 1 Machine Frame 2 Turret Member 3 Bearing 4 Drive Mechanism 5, 6 Spindle 7, 8, 11, 12 Induction Motor 9 Movable Frame 10 Contact Roller 13, 14 Sprocket 15 Chain 16, 19 Fluid Cylinder 17 Stopper Pin 23 18 Detector 20 Control unit 40 Tube 50 Package 21, 22, 23, 24 Inverter 25, 26, 27, 28 Regenerative braking resistor 29 Control device 30 Input means 31 AC power supply 29a Main control unit 29b Braking control unit 29c, 29d, 29e, 29f Switching switch

Claims (2)

[Claims] 1. A winding machine in which a rotation of a turret member mounted with a spindle from a yarn switching position to a package taking-out position is performed by an induction motor, and the rotation of the induction motor is controlled by an inverter. Control method for automatic switching winder. 2. The control method for an automatic switching winder according to claim 1, wherein regenerative braking is applied during deceleration operation of the induction motor.