JPH02139429A - Double twister - Google Patents

Abstract

PURPOSE:To coincide the stop of a spindle with the stop of a winder by providing a control circuit for a driving motor attached to each spindle separately from the driving apparatus of a winding part and providing a brake circuit to brake the motor at the stop of the drive. CONSTITUTION:A spindle shaft 3 of a spindle 1 is driven with a motor 4 and a yarn 10 is wound on a package 12 by the rotation of a driving roller 11 driven by a driving apparatus different from the motor 4. A brake circuit is placed in the control circuit for the motor 4 and the motor is stopped at an arbitrary time in the stop of the driving action. The motor can be stopped simultaneous to the stop of the winder.

Description

[Detailed description of the invention] [Industrial application field]

This optical application relates to a double twisting machine, and in particular to an improvement of its spindle drive part. BACKGROUND OF THE INVENTION In a conventional double twisting machine, as shown in FIG. 4, in order to double twist the yarn of a yarn feeding cheese 42 inserted into a spindle 41, a spindle shaft 43 is rotated by a belt 44. There is. In addition, the thread 50 is pulled by the winding force of the thread to the pan cage 52 due to the rotation of the drive roller 51 which is operated by a drive device different from the belt 44, and while the thread of the thread feeding cheese 42 is unwound by the flyer 45, The thread is introduced into the center hole at the top of the tensor top 46. The yarn passing through the center of the spindle 41 is pulled out from the spindle 41 while being applied with a predetermined tension by a tensor, forms a balloon with the Snell wire 47, and is guided to a winder, thereby performing double twisting. This thread 50 passes through a guide roller 48, reaches a traverse guide 49, and is wound into a package 52 under a guide such as a predetermined traverse. As shown in FIG. 5, the belt 44 has pulleys 55,
The belt 44 is driven by a motor 57 that is stretched between the belts 56 and 56 and drives the pulley 55 . A large number of spindle shafts 43 are in pressure contact with the belt 44, and the frictional force with the belt 44 drives each spindle.

[Problem to be solved by the invention]

In conventional double-twisting machines configured in this way, many spindles are driven by the same belt, and as a result, all spindles are driven at the same speed, so only the same type of yarn can be twisted. . Furthermore, if the drive is stopped during the yarn twisting operation, the belt drive motor and the drive device for the winding member are stopped, but the spindle 41 and the traverse guide 49. The winding member 58 including the drive roller 51 continues to rotate for a while due to the inertial force. That state is the 6th
As shown in the figure, there is a difference in inertia between the spindle, which rotates at high speed, and the winding member system, which is relatively slow. When the rotation speed decreases due to a power outage, the winding member stops earlier, whereas the winding member stops earlier.
The spindle side tends to rotate for a while. This is due to the inertia force of the spindle drive system, especially the belt 44.
This is because it is large including the pulleys 55 and 56. SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks of the conventional ones, the present invention provides a double twisting machine equipped with a winding member, in which a drive device for each spindle is provided separately from a drive device for the winding member. In addition to providing a drive motor, a drive 17 is provided in the spindle drive motor control circuit.
1. A double twisting machine characterized by being equipped with a brake circuit that applies a brake to the motor when the fF is stopped.

[For production]

By configuring the present invention as described above, each spindle is operated by a respective drive motor, and arbitrary rotation control is performed for each spindle, and when the drive is stopped, a brake circuit provided in the control circuit is operated. The winding machine is stopped at an arbitrary point by , and the winding machine including the winding traverse is stopped at the same time as the winding machine. (Embodiment) An embodiment of the present invention will be explained based on Fig. 1. In Fig. 1, the main structure is the same as that of the conventional one shown in Fig. 4. The spindle shaft 3 of the spindle 1 is driven by a motor 4 having a shaft 13 connected to the spindle shaft 3, and the motor 4 is fixed to a frame bracket 14.Thereby, a drive device separate from the motor 4 is used. The yarn 10 is pulled by the force of winding the yarn onto the package 12 due to the rotation of the driving roller 11 operated by the
into the center hole at the top of the At this time, the flyer 5 unwinds the yarn of the fixed yarn feeding cheese 2. The yarn passing through the center of the spindle 1 is pulled out from the spindle while being applied with a predetermined tension by the tensor, forms a balloon with the Snell wire 7, and is guided to the winding member 18, thereby performing double twisting. This system 10 passes through a guide roller 8 and reaches a traverse guide 9, where it is wound up into a package 12 under a predetermined guide such as traversing. On the other hand, the outline of the drive circuit configuration of the spindle drive motor 4 will be explained based on FIG. 2. The current from the power supply is passed through the diode D in the power supply circuit 23.
7. It is rectified via a large-capacity capacitor c1 and enters a well-known commutatorless motor drive circuit 24. Note that during normal operation, the transistor Tr7 is turned off, so the brake circuit 25 does not operate. Each of the transistors Tr1 to Tr6 of the motor drive circuit 23 is sequentially turned on by a control circuit based on a separate rotary shaft position detection means. Since this control is well known, its explanation will be omitted. The motor 4 is driven at an arbitrary rotation speed by the output of the motor drive circuit 23. On the other hand, a part of the current from the power source is transformed by the transformer L1 of the auxiliary power supply circuit 26, rectified and waveform-shaped by the diode D8 and the circuit 22, and then passed through the diode D9 and the resistor R.
The capacitor C2 is charged via the capacitor C2. Capacitor C
2, one is inputted via the diode D1o, and the other is directly inputted to the power supply switching circuit 21 in the brake circuit. The brake circuit 25 includes a transistor Tr7 that is turned on and off based on the divided voltages of the resistors R and R2, and when the transistor Tr7 is on, a current flows through the resistor R3. In this control circuit, during normal operation, the voltage division between the resistors R1 and R2 is not large, so the transistor Tr7 is not turned on. Therefore, the motor 4 is rotated by the current from the power supply circuit 23, and the spindle 1 is rotated at a predetermined rotation speed. Drive. Further, the auxiliary power supply circuit 26 charges the capacitor C2. On the other hand, in the event of a power outage or other drive stoppage, the current supply to the motor 4 is cut off, and the motor starts generating electricity through rotation due to inertial force of the motor. The current flows through the diodes D, D, D
Due to the current blocking by D1.6, only through D1. D3 5 Current flows in the opposite direction to that when energized. Moreover, the motor 4 generates a high surge voltage due to a sudden current cut due to a power outage or switch-off. As a result, the voltage division of the resistors R and R becomes a voltage that turns on the transistor Tr7, which is larger than the normal voltage. Further, the auxiliary current charged in the capacitor C2 keeps the transistor Tr7 energized by the switching operation corresponding to the voltage change in the power supply switching circuit 21, regardless of the fluctuation in the current generated by the motor. As a result, the current generated from the motor 4 is consumed by flowing through the resistor R3. This current consumption becomes a load on the motor, which functions as a generator, and receives the braking force to perform a predetermined braking operation. As a result of this operation, as shown in Fig. 3, when the spindle rotates at high speed during a power outage at t, in the conventional device, the rotation speed decreases as shown at point 1i133 due to its inertial force, and the spindle stops at t3. However, since the device of the present invention uses only an individual motor without using the Peruvian e-drive device, the inertia force itself is small, and as a result of the brake operation, the rapid acceleration as shown in solid line 31 The rotational speed is decreased at t and stopped at t. The time t2 is adjusted by setting the resistor R3 of the brake main circuit 25 so that it coincides closely with the stop time t2 of the winding member drive system. In the above embodiment, since the auxiliary power supply uses the capacitor C2, the discharge voltage decreases at time t4 as shown by the solid line 34 in FIG. You can also use In this case, as indicated by a dotted line 35 in FIG. 3, the auxiliary power supply maintains a predetermined voltage until a separate switch is turned off. (Effects of the Invention) As detailed above, the present invention provides a double twisting machine equipped with a winding member, in which a drive motor is provided for each spindle separately from a drive device for the winding member, and the spindle drive motor Since the drive circuit is equipped with a brake circuit that brakes the motor when the drive is stopped, the motor installed for each spindle can be driven with independent rotation speed settings, making it possible to twist a wide variety of yarns in parallel. can be done.Also,
During a power outage or other drive stoppage, the inertia of the spindle drive system decreases, so it becomes close to the inertia of the winding member.
In addition to stopping relatively quickly, the motor is equipped with a brake circuit in its control circuit, so the motor can be braked without using a mechanical brake, and stopping the spindle is also the same as stopping the winder. Matching can also be easily achieved.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, FIG. 1 is a side view showing the overall outline of the device, FIG. 2 is the ffllJIll circuit of the spindle drive motor, and FIG. 3 is the circuit of the device of the present invention. 4 and 5 show the conventional device, FIG. 4 is a side view showing its overall outline, FIG. 5 is an explanatory diagram of the belt device that drives the spindle, and FIG. The figure which shows the operating state of the conventional vR station. 1...Spindle. 3...Spindle axis. 9...Traverse guide. 18... Winding member. 24...Motor drive circuit. 26... Auxiliary power circuit 2... Yarn feeding cheese. 4...Motor. 11... Drive roller. 23...Power supply circuit. 25...Brake circuit. Patent Applicant Murata Machinery Co., Ltd. Agent Patent Attorney Katsu Ohno Agent Patent Attorney Reiko Ohno

Claims (1)

[Claims] 1. In a double twisting machine equipped with a winding member, a drive motor is provided for each spindle separately from the drive device for the winding member, and a brake is applied to the motor when the drive is stopped in the spindle drive motor control circuit. A double twisting machine characterized by being equipped with a brake circuit.