JPH0428811B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a double twisting machine.

[Background of the invention]

In the above-mentioned double twisting machine, as is well known, the yarn is unwound from the yarn supply package, enters the spindle axis, is given appropriate tension by a tension device, is ballooned by a rotating rotary disk, is twisted, and is then wound. It is wound into a package. The rotary disk is fixed to a spindle, and one rotation of the spindle results in two twists. That is, the number of twists per meter is expressed by the following equation.

Number of twists=spindle rotational speed (rpm) x 2/yarn speed (m/min) Note that the yarn speed in the above equation depends on the yarn winding speed of the winding package.

By the way, the number of twists mentioned above may be changed depending on the type and thickness of the yarn to be fed, or even if the yarn is of the same type, it may be twisted strongly (strongly twisted yarn) or lightly twisted (slightly twisted yarn). However, the number of twists mentioned above may be reset before the double twisting machine starts operating. In particular, in recent years, as in many other fields, high-mix, low-volume production has been advocated in the yarn twisting industry, and the number of times the number of twists is changed is increasing.

Here, the drive-related structure of a conventional double twisting machine will be briefly described. The spindle of the double twisting machine, in which many spindles are arranged in parallel, can be rotationally driven by a running endless belt. The endless belt is wound around a pair of pulleys, one pulley is connected to the output shaft of a drive motor, and the driven rotational force of the rotational shaft of the other pulley is used as the rotational force of the take-up package. ing. That is, the motor for rotating the spindle and the motor for rotating the take-up package are the same. This is for the economical reason of minimizing power consumption by using only one motor.

In a double twisting machine with the above structure,
The output shaft of the drive motor and the rotating shaft of the drum that presses against the winding package and transmits rotational drive are connected by several gears. Conventionally, when resetting the number of twists, the above gears are connected to another gear. The rotational speed of the drum was changed by changing the gear ratio. That is, since there is a single drive source, if the rotation speed of the drive motor is changed in order to change the rotation speed of the drum, the rotation speed of the spindle will change accordingly, and the number of twists will not change. For example, if the number of rotations of the drive motor is doubled in order to double the number of rotations of the drum, the number of rotations of the spindle will also be doubled, and the number of twists will not change at all according to the above equation.

However, changing the number of twists by changing the gears as described above has the problem that changing the gears is cumbersome, messy, or the desired number of twists cannot be obtained because the gears are mistaken for similar gears. There was a problem in that the gear change was time-consuming and the number of twists could not be changed quickly, making it impossible to cope with the above-mentioned high-mix, low-volume production.

[Means for solving problems]

This invention rotates a spindle and a winding package through a drive mechanism from one drive motor, and winds up the yarn while imparting a double twist to the unraveled yarn from a yarn feeding package attached to the spindle. A double twisting machine for winding yarn onto a take-up package includes (a) a means for inputting a set number of twists, (b) a means for measuring the number of revolutions of a spindle, and (c) a means for measuring a yarn winding speed. , (d) means for inputting the outputs from the spindle rotational speed measuring means and the yarn running speed measuring means to calculate the measured number of twists, and further calculating the difference between the measured number of twists and the set number of twists; e) Yarn winding speed changing means operated by the output from the calculation means.

〔Example〕

FIG. 1 shows a double twisting machine according to the present invention and a drive mechanism for the double twisting machine. The above double twisting machine 1
has multiple spindles arranged side by side. Reference numeral 2 indicates a cover for the yarn supply package, and the yarn supply package is placed inside the cover 2. 3 indicates a spindle, which is in contact with the running belt 4. Winding package cage 5
is in pressure contact with the actively rotating drum 6, and is given rotational force by the drum 6. 7 indicates a traverse guide, and 8 indicates a feed roller.

Next, the drive mechanism 10 will be explained. The endless belt 4 has a pair of first and second pulleys 1
It is wrapped between 1 and 12. Reference numeral 13 indicates a drive motor, and two third and fourth pulleys 15 and 16 are fitted to the output shaft 14 of the motor 13, and one of the third and fifth pulleys 15 and 17 is connected to a belt. A belt 20 is wound around the other fourth pulley 16 and sixth pulley 19. The first pulley 11 and the fifth pulley
The pulleys 17 are fitted on both ends of the shaft 21, and the output of the drive motor 13 is transmitted to the running belt 4 via the output shaft 14, the third pulley 15, the belt 18, the fifth pulley 17, and the first pulley 11. The belt 4
The spindle 3 is rotated by running.

The sixth pulley 19 is fixed to one end of a shaft 22, and the other end of the shaft 22 is connected to a speed change belt device 5, which will be described later.
Connected to 0. Reference numeral 23 indicates a deceleration box, and a plurality of gears are installed in the box 23, which inputs the rotational force from the output shaft 51 of the speed change belt device 50, decelerates the speed at a constant rate, and simultaneously changes the direction of rotation. ing.

A seventh pulley 25 is fitted onto the output shaft 24 of the deceleration box 23. As shown in FIG. 3, a belt 30 is wound around the seventh pulley 25, the eighth pulley 27 fitted on the support shaft 26, and the ninth pulley 29 fitted on the support shaft 28. The drum 6 is fitted onto the support shaft 26 at a predetermined interval, and a three-stage pulley 31 is fitted onto one end of the support shaft 26. Further, the feed roller 8 is fitted onto the support shaft 28 at a predetermined interval.

A belt 34 is wound around the three-stage pulley 31 and the three-stage pulley 33 fitted to one end of the shaft 32. The other end of the shaft 32 is connected to gears 35 and 36.
It is connected to the grooved drum 37 by. A cam groove 38 is formed in the drum 37.
A camshaft 39 is fitted into the camshaft 39. A reciprocating rod 40 is fixed to the camshaft 39, and the traverse guide 7 is fixed to the rod 40 at a predetermined interval. With the above configuration,
The output of the drive motor 13 passes through the belt 20, the variable speed belt device 50, the deceleration box 23, and the belt 30, and then the support shaft 26 of the drum 6 and the feed roller 8.
28 and rotate the drum 6 and feed roller 8, respectively.

Further, the rotation of the support shaft 26 further increases the rotation of the belt 3.
4 to the grooved drum 37, and the drum 37
As the camshaft 39 moves along the groove 38 due to the rotation of the traverse guide 7, the traverse guide 7 reciprocates.

Next, the speed change belt device 50 will be explained based on FIG. 2. A belt 54 is wound between the input pulley 52 and the output pulley 53.
The input pulley 52 has outer and inner washers 55,5
6, and a holder 57 is fixed to the outer washer 55. control motor 5
8 is connected to the holder 57 via a clutch 60, and the outer washer 55 is movable in the direction of the shaft 59 relative to the inner washer 56 by the operation of the motor 58. Inner wash 5
6 is immovable. The inner sides of both washers 55 and 56 are tapered 61 and 62, respectively.
The engagement position between the belt 54 and the washers 55, 56 changes depending on the distance between the washers 55, 56. That is, when the separation distance is small, the belt 54 engages with the washers 55, 56 near the outer peripheries of the washers 55, 56, and the input pulley 5
The diameter of the winding of No. 2 is large, and conversely, when the above-mentioned separation distance is large, the belt 54 is attached to both washers 55, 5.
The input pulley 52 is engaged with the washers 54 and 56 near the inner diameter of the input pulley 52, and the diameter of the input pulley 52 becomes small. As described above, by changing the diameter of the winding of the input pulley 52 by operating the control motor 58, it is possible to change the rotational speed output from the output shaft 51 of the output pulley 53. . The clutch 60 causes the motor 58 to
The output shaft 59 and shaft 63 can be selectively connected and uncoupled.

When the control motor 58 is activated, the clutch 60 is in a connected state, and when the drive motor 13 is activated, the clutch 60 is in a disconnected state.

Prior to the operation of the double twisting machine 1, when it is necessary to change the number of twists, the desired number of twists (T) is inputted from the input board 64 as shown in FIG.
The input value to the input board 64 is input to the control board 65. The control board 65
The yarn speed (Y) is determined by the following equation based on the number of twists (T) and the spindle rotation speed (S).

Y=2S/T After the above yarn speed (Y) is determined,
The output of the control motor 58 is controlled in the variable speed belt device 50 to obtain a speed change amount sufficient to obtain the yarn speed (Y).

In FIG. 1, a detection object 66 made of a conductive material and having a convex portion or a concave portion formed in a disk-shaped circumferential portion is fitted onto the support shaft 26. As shown in FIG. By detecting the rotation of the detected object 66 with a proximity sensor 67, the actual rotation speed of the drum 6 is detected. If the detected actual rotational speed of the drum 6 does not match the predetermined calculated value, the speed change belt device 50 is further operated to control the rotation speed so that the two match. An output 68 of the sensor 67 is connected to the control board 65. In addition, sensor 6
7 is not limited to the one using the above-mentioned proximity switch, but an optical sensor or the like may also be used.

FIG. 4 shows a more detailed structure of the control board 65 in a block diagram. This control board 65 includes RAM100, ROM
101, a CPU 103, an input/output interface 104, and a timer 105. The rotation speeds of the support shaft 26 of the winding drum 6 and the support shaft 21 of the first pulley 11 are input to the control board 65, and the display 110 and the input board 64 are input with the number of revolutions of the support shaft 26 of the winding drum 6 and the support shaft 21 of the first pulley 11.
12, respectively. Rotors 66, 66a having two teeth 115 at opposing positions are fixed to the support shafts 26, 21, and the rotors 66, 66a are detected by proximity sensors 67, 67a. The signal detected by the sensor is divided by 1/4 frequency divider 1
20, 120a, period measuring device 121,
The signal is input to the control board 65 via 121a. In the 1/4 frequency divider 120, 120a,
As shown in FIG. 5, the frequency of the signal Sg1 detected by the sensors 67, 67a is halved and outputted as Sg3. Note that the signal Sg2 indicates a state where the frequency is 1/2. The ON time or OFF time of the signal Sg3 corresponds to one rotation period of the rotors 66, 66a, and by measuring the ON time or OFF time with the period measuring device 121, 121a, that is, 1/4 minute. Measuring device 121, 121 for frequency signal Sg3
a gate signal, and the reference clocks 122, 12
By measuring the period at 2a, the support shaft 26
Or 21 rotation periods are measured. Therefore, highly accurate measurements can be made in a short period of time, which is the rotation time of the rotor. Usually, a method is used to count the number of pulses using a rotor with many teeth, but in this case, it takes time to obtain a signal of 1000 pulses in order to obtain high accuracy, for example, an accuracy of about 0.1%. In particular, when the rotation speed is slow, it takes a long time. Moreover, since two teeth are attached to the rotor, the rotational balance is good and there is no problem even when the rotor rotates at high speed, and the rotor does not require high machining accuracy.

Signals outputted via the input/output interface 104 of the control board 65 are inputted to the switching device 130. In the switching device 130, the control motor 58
Switching between forward and reverse rotation is performed. That is, the a contact 133 of one forward rotation line 131 and the b contact 136 of the other reverse rotation line 132 are interlocked,
Similarly, the b contact 134 of the normal rotation line 131 and the a contact 135 of the reverse rotation line 132 are interlocked, so that when one line is open, the other line is closed. 137 represents a power source, and 138 represents a speed reducer.

The control within the CPU 103 will be explained based on the block diagram of FIG.

Step: The control described below is performed only during machine operation.

Step: Measure the rotation period of the support shaft 21 of the first pulley 11, calculate the rotation speed of the pulley 11 from the measured value, and then convert the rotation speed to the spindle 3.
Convert to the number of rotations.

Step: Similarly, the rotation period of the support shaft 26 of the winding drum 6 is measured, and the yarn winding speed is calculated from the measured value.

Step: Calculate the number of twists (T) from the spindle rotation speed and yarn winding speed. Note that the number of twists = 2 x spindle rotation speed/yarn winding speed.

Step: Take the difference between the set number of twists (T ₀ ) inputted from the input board 64 and the actual number of twists above, compare the absolute value with the allowable value, and if it exceeds the allowable value, proceed to YES and confirm that it is exceeded. If not, proceed to NO.

Step: Calculate the ON time (tm) of the drive motor 58 from the above |T-T ₀ | value. The speed change ratio by the speed change belt device 50 changes depending on the length of the ON time.

Step: The direction of rotation of the motor 58 is determined based on the positive or negative value of the above (T-T ₀ ) value.

Step: Drive the motor 58 under the conditions calculated in the above step.

As described above, the operator can obtain a wound package with the desired number of twists simply by inputting the desired number of twists from the input board using the keyboard.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the desired number of twists can be obtained simply by inputting the desired number of twists from the input keyboard, and the number of twists can be obtained quickly, without any effort, and accurately. It was possible to obtain a double twisting machine that can change the number of twists and can immediately respond to the aforementioned high-mix, low-volume production.

[Brief explanation of drawings]

FIG. 1 is a front view showing a double twisting machine and a drive mechanism of the double twisting machine according to the present invention, FIG. 2 is a front view showing a variable speed belt device, and FIG. 3 is a
Figure 4 is a block diagram showing the internal structure of the control board, Figure 5 is a schematic diagram showing the signal detected by the sensor and the signal output after a 1/4 minute cycle, and Figure 6 is a cross-sectional view taken along line A. FIG. 3 is a flowchart showing control contents within the control board. 1...Double twisting machine, 3...Spindle, 4...
Endless belt, 5... Winding package, 6... Drum, 11... Drive pulley, 13... Drive motor, 14... Output shaft.

Claims (1)

[Claims] 1 A spindle and a take-up package are rotationally driven from one drive motor via a drive mechanism, and the unraveled yarn from the yarn feeding package attached to the spindle is given a double twist while being applied to the take-up package. In a double twisting machine for winding, a means for inputting a set number of twists, a means for measuring the rotational speed of the spindle, a means for measuring the winding speed of the yarn, the spindle rotational speed measuring means and the yarn traveling speed. A means for inputting the output from the measuring means to calculate the actual number of twists and further calculating the difference between the actual number of twists and the set number of twists, and a thread winding speed operated by the output from the calculating means. A twist number setting device for a double twisting machine, comprising a speed change means.