JPS5935814B2 - Tapered tube winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tapered tube winding device for winding yarn in a tapered shape around a tubular bobbin of a shuttle used in a knotless knitting machine.

The shuttle (bobbin holder) used in general knotless knitting machines has a conical mechanical structure, so the shape of the bobbin fully wound with yarn should have the same taper angle as the shuttle. desirable.

Therefore, as shown in FIG. 1A, the conventional tubular bobbin 1 is manufactured at almost the same angle as the shuttle, and when winding thread onto this tubular bobbin 1, the thread is unwound through a traversing device. This device was moved at a constant speed in the axial direction of the bobbin, and the tubular bobbin 1 was rotated at a fixed position to perform the tube winding operation. In recent years, it has been desired to increase the winding amount of bobbin thread as the length of the net has increased, and the ready-made shuttle 5
In order to increase the amount of yarn wound in a tubular bobbin that can be applied to a thin straight tubular bobbin 2, the winding part of the tubular bobbin is made thin and straight or the taper angle is made small, as shown in Fig. 1B. Attempts were made to wind many threads in a tapered manner.

For this reason, it is necessary to gradually speed up the movement of the traversing device that guides the 10 yarns in the direction of the bobbin axis to reduce the amount of winding. A pipe winding device has been proposed in which the moving speed of the traversing device is controlled by calculating the moving speed of the traversing device using an arithmetic circuit. However, in this tube winding device, the control circuit such as the calculation section becomes complicated, and when the taper shape and thickness of the tubular bobbin, the thickness of the thread, etc. change, it is necessary to change the calculation constants of the calculation section. However, there was a problem that required complicated operations such as changing programs. This invention was made to solve the above-mentioned problems, and it is possible to adjust the taper angle of the wound state with a simple operation even when changing the tubular bobbin or the thickness of the thread, and it is relatively easy to control. It is an object of the present invention to provide a tapered tube winding device capable of accurately winding a tapered tube onto a tubular bobbin by using a circuit and a control operation.

Embodiments of the present invention will be described below based on the drawings.

30 FIG. 2 shows a perspective view of the structure of the tapered tube winding device, and 3
A spindle rotates the tubular bobbin 2 at a constant speed in one direction and winds up the thread 4, and is connected to be rotationally driven by a motor 5.

The tubular bobbin 2 is supported between the tip of the spindle 3 and the support metal 6 so as to be rotatable 35 times. Reference numeral 8 denotes a traverse device which is screwed onto a shaft T with a feed screw and movably supported by a guide rail (not shown), which swings a traverse arm 8a on which the thread 4 is hooked left and right at a constant speed. , it has a structure in which it moves from the left to the lower right in FIG. 2 by rotation of the shaft T with a feed screw.

The feed screw shaft 7 is connected to a drive shaft 9 through gears 6a and 6b, and is rotated by the drive shaft 9 which is rotationally driven by a speed control motor 10. Reference numeral 11 denotes a control device for a speed control motor 10 that moves the traversing device 8 along the axial direction of the tubular bobbin 2, and controls the rotational speed of the speed control motor 10 to change at a set rate of increase. As a result, the moving speed of the traversing device 8 is gradually increased.

The control device 11 is configured as shown in the block diagram of FIG. 3, and 12 is a speed command signal generation circuit, which has a built-in DC constant voltage circuit and an initial voltage setting circuit for setting the initial value of the DC speed command voltage. It includes a circuit 12a, a voltage increase circuit that increases the speed command voltage at a predetermined rate of increase from the initial voltage, and a voltage increase rate setting circuit 12b that sets the rate of increase. Then, the initial voltage setting circuit 12a connects the variable resistor 1
By operating the variable resistor 13b, the DC initial voltage of the speed command signal can be set in the range of, for example, 0 to 5V, and the voltage increase rate setting circuit 12b sets the voltage increase rate of the speed command signal to, for example, o It can be set in the range of ~Δ15V/5 minutes. On the other hand, the speed control motor 10 controlled by the DC voltage Es of the speed command signal is an induction motor equipped with a speed generator 14, and receives electric power from a motor control circuit 15 that employs thyristor firing angle control. It is supplied, rotated, and driven.

16 is a deviation amplification circuit, and a speed command signal generation circuit 12
The speed command signal voltage Es and the DC voltage Eg obtained by rectifying the output of the speed generator 14 by the rectifier circuit IT are input, and the speed command voltage Es and this DC voltage Eg are compared, and the deviation signal is amplified. is output to the thyristor firing circuit of the motor control circuit 15, and a trigger pulse is applied to the thyristor with a phase corresponding to this signal to control its conduction angle, so that the voltage applied to the motor 10 is equivalently This is a structure in which the rotational speed of the motor 10 is controlled.

Therefore, the speed control motor 10 is feedback-controlled by the output of the speed generator 14, and its speed is accurately controlled based on the voltage Es of the speed command signal. Next, the operation of the tapered tube winding device will be explained.

First, as shown in FIG.
When winding a tube using 0 denier/40 threads, the setting voltage of the initial voltage setting circuit 12a is changed to the variable resistor 1.
3a to 2.3V, and the voltage increase rate setting circuit 1
2b voltage increase rate to 6V/5 by variable resistor 13b.
Set to minutes. In this state, the control device 11 is operated to start the speed control motor 10, and the motor 5 is also started to rotate the tubular bobbin 2 at a constant speed in the direction of the arrow in FIG. 2 via the spindle 3. Then, the traversing device 8 swings the thread 4 on the traverse arm 8a, and rotates the threaded shaft 7 by the rotation of the speed control motor 10, thereby rotating the second shaft 7. Move from left to right in the diagram,
The thread 4 is wound onto the tubular bobbin 2 from left to right. At this time, the speed control motor 10 is controlled by the speed command signal generation circuit 12.
Based on the speed command signal voltage Es which is output from the motor and changes upward as shown in graph A in Fig. 4, the rotational speed of the tubular bobbin 2 is accurately controlled to linearly increase its rotational speed, and 1 minute and 17 seconds after the start, the tubular bobbin 2 The thread 4 is wound around the pipe to the state shown in FIG. 1B, and the pipe winding operation is completed. On the other hand, when winding polyethylene 400 denier/15 threads 4, which are thinner than the above-mentioned threads, onto a straight tubular bobbin 2 at a similar taper angle of 1.3, the setting voltage of the initial voltage setting circuit 12a is set by a variable resistance. The voltage increase rate of the voltage increase rate setting circuit 12b is set to 0.9V/5 minutes by the variable resistor 13b.

When pipe winding work is started in this state, the speed control motor 10
is controlled to linearly increase its rotational speed based on the speed command signal voltage Es, which increases as shown in graph B in FIG. The thread is wound so as to have a predetermined taper angle as shown in FIG. 1B, and the tube winding operation is completed. In this way, even with a straight tubular bobbin, the initial speed and speed increase rate of the motor 10 that moves the traversing device can be specified by the initial value and voltage increase rate of the speed command signal voltage by a simple operation. , all kinds of threads can be wound into a tube at a predetermined taper angle.

In the above embodiment, the winding taper angle of the tubular bobbin was adjusted by controlling the speed of the motor that moves the traversing device. The winding taper angle can also be adjusted by similarly controlling the speed of the winding.

As explained above, according to the tapered tube winding device of the present invention, the taper angle of the wound state can be easily adjusted by simply operating a variable resistor, without requiring a complicated circuit such as an arithmetic circuit. .

Therefore, even on a straight tubular bobbin, yarn can be wound at any desired taper angle.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; FIG. 1A is a sectional view of a bobbin in which a thread is wound around a tapered tubular bobbin, and FIG. 2 is a perspective view of the tapered tube winding device, FIG. 3 is a block diagram of the control device 11, and FIG. 4 is a graph showing temporal changes in the speed command signal voltage. 2...Tubular bobbin, 4...Thread, 8...
... Traverse device, 10 ... Speed control motor, 12 ... Speed command signal generation circuit, 12a ...
...Initial voltage setting circuit, 12b... Voltage increase rate setting circuit, 13a, 13b... Variable resistor, 15... Motor control circuit.

Claims (1)

[Claims] 1. In a tapered tube winding device that winds the thread in a tapered shape on the tubular bobbin by moving the traversing device on which the thread is wound along the tubular bobbin while rotating the tubular bobbin, the traversing device is moved. a speed control motor; a speed command signal generation circuit having a variable resistor for setting an initial value and rate of increase of a speed command signal voltage and outputting a speed command signal for the speed control motor; A tapered tube winding device comprising a motor control circuit that controls the speed of the speed control motor.