JP2551134B2 - Spinning machine driving method and device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning machine driving method and a spinning machine having a plurality of driving systems which are required to be stopped in synchronization with each other when stopped.

[Prior Art] Spinning machines such as a roving frame, a spinning frame, and a card generally have a plurality of drive systems that play different roles from each other.
Since each drive system is required to operate in synchronization with each other especially at the time of starting and stopping, a method of mechanically connecting a plurality of drive systems by a gear transmission mechanism, a belt transmission mechanism, etc. is adopted. ing. However, in the device that drives by connecting each drive system with a gear transmission mechanism or the like,
When changing the speed ratio of each drive system due to changes in spinning conditions, etc., there is the inconvenience that changing gears requires replacement work, and changing spinning conditions is troublesome. Especially, high-mix low-volume production is required. The inconvenience is remarkable today. Therefore, multiple drive systems are configured to be driven and controlled by separate drive motors, and the control signal of each drive motor can be electrically changed without changing the change gear when changing the spinning conditions. Has proposed a device in which the speed ratio of each drive system is changed.

In a device that controls the drive of each drive system with separate drive motors like this, if the power supply to each drive motor is stopped due to an abnormal situation such as a power failure, the synchronization of each drive system is ensured due to the difference in the moment of inertia. The machine base is stopped without doing so, and there is a disadvantage that thread breakage, sliver breakage, etc. occur at the time of stopping. In order to eliminate this inconvenience, JP-A-60-246826
In the publication, an emergency power supply device having an emergency power supply battery is provided in a spinning machine or a twisting machine having a separate drive motor, and the power supply of the drive motor is switched to the emergency power supply device and stopped when an abnormality such as a power failure occurs. A device has been proposed in which each drive system is synchronously stopped until time.

[Problems to be Solved by the Invention] However, when the battery is provided as the emergency power source and the drive motor is driven by the battery as described above, there is a disadvantage that the battery becomes large. Further, in a device in which each drive system is driven by a separate drive motor, it is difficult to drive each drive system in synchronization at the time of startup, and there is a problem that thread breakage easily occurs at startup.

The present invention has been made in view of the above problems, and an object thereof is to drive a plurality of drive systems by separate drive motors in the event of an abnormality such as a power failure without providing a large emergency battery. Provide a method for driving a spinning machine that can stop the machine base while ensuring system synchronization, and perform the above-mentioned driving method, and drive the machine system while ensuring synchronization of each drive system when the machine is started. Another object of the present invention is to provide a spinning machine driving device.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, in a spinning machine provided with a plurality of drive systems that need to be stopped in synchronization with each other at the time of stop, each of the drive systems is It is driven by separate drive motors, and each drive system can be connected to a mechanical transmission whose speed ratio is changed by the motors via an electromagnetic clutch, and the electromagnetic clutch is held in a disengaged state during normal operation and the electromagnetic clutch Shift control of the mechanical transmission is performed so that the rotational speeds of the connectable shafts are the same, and when the energization of the drive motor of each drive system is stopped, the electromagnetic clutch is brought into the connected state to drive each drive system. I tried to connect.

Further, in the device for carrying out the above-mentioned driving method, a driving motor provided for each driving system of a plurality of driving systems which needs to be stopped in synchronization with each other at the time of stopping, and a driving motor of each driving system. A transmission mechanism including a mechanical transmission and an electromagnetic clutch whose gear ratio is changed by a motor provided therebetween, a control device for driving and controlling each of the drive motors based on a predetermined setting program, and the electromagnetic clutch. A detector for detecting the rotational speed of each of the two shafts, which are contacted and separated, and a detection signal of the detector are input, and the motor of the mechanical transmission is driven so that the difference between the rotational speeds of the two shafts becomes zero. And a control device for controlling.

[Operation] In the present invention, each drive motor that drives each drive system is driven by the control device in a synchronous state at a speed corresponding to a predetermined spinning condition. The electromagnetic clutch provided between the drive systems is kept disengaged during normal operation, and the drive systems are driven in a completely independent state. The gear ratio of the mechanical transmission provided between the drive systems is changed by the electromagnetic clutch so that the rotational speeds of the connectable shafts are the same. If the power to each drive motor is stopped due to an abnormal situation such as a power failure,
The electromagnetic clutch is put in the connected state and the respective drive systems are mechanically connected. At this time, since the speed change ratio of the transmission is set to be the same as the frequency ratio of each drive system, the machine base is stopped in a state where the synchronous state of each drive system is secured.

The drive device according to the second aspect operates as described above during normal operation and during abnormal conditions. Further, by driving each drive motor with the electromagnetic clutch in the connected state at the time of startup, each drive system is started in a state where its synchronism is secured.

Example 1 Next, an example in which the present invention is embodied in a roving frame will be described with reference to FIG. The front roller 1 forming the draft part rotates via a gear train 5 arranged between one end of the front roller 1 and a driving shaft 4 which is rotationally driven by a main motor 2 as a drive motor via a belt transmission mechanism 3. It is designed to be driven. The flyer 6 has a driven gear 7 fitted and fixed on an upper portion thereof so as to be integrally rotatable, and a drive gear 10 fitted on a rotary shaft 9 to which the rotation of the driving shaft 4 is transmitted via a belt transmission mechanism 8. It is designed to be rotated.

On the other hand, a rotary shaft 13 to which a drive gear 12 that meshes with a driven gear 11a of a bobbin wheel 11 mounted on a bobbin rail (not shown) is fitted and fixed is used as a drive motor driven at a variable speed via an inverter 14. Is connected to a drive shaft 16 driven by the variable speed motor 15 via a universal joint 17 and a connecting shaft 18. That is, in the roving machine of this embodiment, the drive system driven by the main motor 2 and the variable speed motor 15 are used.
There is a drive system driven by.

Rotational speed detectors 19 and 20 are provided in the vicinity of the gear 1a that is rotated integrally with the front roller 1 and in the vicinity of the driven gear 7 of the flyer 6, respectively. Front roller 1
A non-contact type roving position detecting device 21 for detecting the tension state of the roving R is provided between the flyer top 6a and the flyer top 6a.
A continuously variable transmission 22 as a mechanical transmission is arranged between the driving shaft 4 and the drive shaft 16. As the continuously variable transmission 22, a device such as a ring cone transmission or a transmission using a continuously variable pulley whose gear ratio can be changed by driving a motor is used.
The rotation of the drive shaft 16 is transmitted to the motor 23 via the belt transmission mechanism 24. The output shaft 25 of the continuously variable transmission 22 can be connected to the driving shaft 4 via an electromagnetic clutch 26. Continuously variable transmission 22
A motor M for changing the rotation speed ratio of the input shaft 23 and the output shaft 25 is built therein. The driving shaft 4
And the output shaft 25 has a detector 2 for detecting the number of revolutions thereof.
7,28 are connected via belt transmissions 29,30.
The control device C shifts the variable speed motor 15 in accordance with a setting program based on the detection signals of the rotation speed detectors 19 and 20 and the roving position detecting device 21 and preset spinning conditions, and the detectors 27 and The motor M of the continuously variable transmission 22 is controlled based on the detection signal of 28.

Next, the operation of the device configured as described above will be described.
The control device C inputs the detection signals from the rotation speed detectors 19 and 20 and the roving position detecting device 21 based on a predetermined spinning condition set in advance, and the input data matches the predetermined spinning condition. Inverter 14 calculates the proper bobbin rotation speed and adjusts it to the speed corresponding to the rotation speed.
The variable speed motor 15 is driven through the variable speed.

During normal operation, the electromagnetic clutch 26 is demagnetized so that the driving shaft 4 and the output shaft 25 of the continuously variable transmission 22 are disengaged, and both drive systems are driven independently. At the time of starting, the continuously variable transmission 22 is set so that its gear ratio becomes equal to the ratio of the rotational speeds of the driving shaft 4 and the input shaft 23. Further, the control device C inputs the signals from both the detectors 27 and 28 and constantly compares the rotational speeds of the driving shaft 4 and the output shaft 25. If there is a difference between the two, the controller C does not make the difference zero. The motor M of the stage transmission 22 is drive-controlled.

The variable speed motor 15 is decelerated as the number of layers of the roving R wound on the bobbin increases, and the number of rotations of the input shaft 23 decreases accordingly. Continuously variable transmission when the rotation speed of the input shaft 23 decreases
If the gear ratio of 22 is maintained in the original state, the rotation speed of the output shaft 25 also decreases, and the driving shaft 4 and the output shaft 25
There is a difference in the number of rotations of. If there is a difference between the two, the control device C
Outputs a drive signal to the motor M so as to change the gear ratio of the continuously variable transmission 22 in the direction in which the difference becomes zero so that the rotation speed of the output shaft 25 becomes equal to the rotation speed of the driving shaft 4. Is corrected to. Therefore, even when the electromagnetic clutch 26 is disengaged, the driving shaft 4 and the output shaft 25 are always kept in synchronization with each other.

The variable speed motor 15 is changed at least every time the number of wound layers of the roving R is increased, and accordingly, the motor M is driven to change the speed ratio of the continuously variable transmission 22, so that the speed ratio is frequently changed. . If the gear ratio is frequently changed while the output shaft 25 is under load, an unreasonable load will be applied to the motor M and the speed change mechanism. However, the gear ratio is changed as described above because of the driving shaft 4 And the output shaft 25 are separated and the output shaft 25 is not loaded,
No unreasonable load is applied to the motor M and the speed change mechanism,
The gear ratio is smoothly changed by driving the motor M.

If an abnormal situation such as a power failure occurs in this state, the main motor 2
Also, the power supply to the variable speed motor 15 is stopped, both drive systems are allowed to rotate by inertia, and an abnormality occurrence signal is output. The electromagnetic clutch 26 is excited by this abnormality occurrence signal, the driving shaft 4 and the output shaft 25 are connected, and both drive systems are mechanically connected. At this time, continuously variable transmission
Since the gear ratio of 22 is maintained at the rotational speed ratio of both drive systems before the occurrence of the abnormal situation, the electromagnetic clutch 26 is smoothly connected and both drive systems are in a predetermined speed ratio, that is, in a state where synchronism is secured. The machine is stopped. The electromagnetic clutch 26 is kept in an excited state by an emergency battery, but unlike the case of driving a motor or the like, it uses a small amount of energy and may be a small capacity battery.

If the electromagnetic clutch 26 is excited at the time of start-up and the driving shaft 4 and the output shaft 25 are connected to start the operation in a state in which both drive systems are mechanically connected, the two drive systems are surely synchronized. Is started, and the occurrence of thread breakage at startup is prevented.

Second Embodiment Next, a second embodiment in which the present invention is embodied in a ring spinning machine will be described.
Description will be made with reference to the drawings. In this embodiment, the drive system of the ring spinning machine drives the spindle S and a ring rail (not shown), and the front roller 3
1, the second roller 32 and the back roller 33 are separately driven by a drive system. Each drive system is driven by a main motor 2 and drive motors M1 to M3, and the main motor 2 and each drive motor M1 to M3 are driven at a speed corresponding to a predetermined spinning condition by a control signal from a control device C having an inverter. Drive control is performed so that each drive system is rotationally driven. The rotation speeds of the main motor 2 and the drive motors M1 to M3 are detected by the rotary encoders E1 to E4 and fed back to the control device C.

Each of the rollers 31 to 33 has a drive motor M1
Driven by ~ M3, the other end and driving shaft 4
Belt transmission mechanisms 34 to 36 and continuously variable transmissions 37 to 39 are disposed between and in order to mechanically connect the both. The rollers 31 and 32 are attached to the input shaft of each continuously variable transmission 37 to 39.
33 rotations are transmitted, and the output shafts 40-42 are electromagnetic clutches 43-
The rotary shafts 46 to 48 can be connected via 45. The output shafts 40-42 and the rotary shafts 46-48 connected by the electromagnetic clutches 43-45 have detectors 49-51, 52-5 for detecting their rotational speeds.
4 are connected respectively. And each detector 49-51,
The output signals of 52 to 54 are input to the controller 55, and the controller 55
Compares the rotational speeds of the shafts on both sides of each electromagnetic clutch 43-45 based on the signal, and if there is a difference between the two, the gear ratio of each continuously variable transmission 37-39 is set to zero. Is controlled so that the motor M of each continuously variable transmission 37-39 is controlled.

Also in this ring spinning machine, the electromagnetic clutches 43 to 45 are demagnetized during normal operation, and the drive systems are driven in a completely independent state. Then, the controller 55 controls each of the detectors 49-5.
Based on the detection signals of 1,52-54, each of the continuously variable transmissions 37-39 is controlled so that the difference between the rotational speeds of the output shafts 40-42 of the continuously variable transmissions 37-39 and the respective rotary shafts 46-48 becomes zero. The motor M is controlled to drive. Therefore, the shafts on both sides of the electromagnetic clutches 43 to 45, which are the connecting portions of the drive systems, are held in a state of being rotationally driven at the same rotational speed. When an abnormal situation such as a power failure occurs in this state, the electromagnetic clutches 43 to 45 are excited and the emergency battery holds the excited state to bring the respective drive systems into the connected state. On the other hand, the main motor 2 and the drive motors M1 to M3 are de-energized, and the drive systems rotate by inertia. Since each drive system has a different moment of inertia, if each drive system remains in an independent state, thread breakage or the like occurs without synchronization of each drive system until the machine stand is stopped, but in the device of this embodiment, the electromagnetic clutch 43 is used. Since each drive system is stopped in a state of being mechanically connected by ~ 45, yarn breakage does not occur.

Further, particularly in the machine base with a large number of weights, the axes of the rollers 31 to 33 are long, and the roller shafts are twisted during the operation of the machine base. Then, this twist tries to return to the original state while the machine stand is stopped, but at that time, since the resistance to each roller shaft is different, if each drive system is independent, the rate of return between the shafts is different. When the machine base is restarted from that state, a difference in twist occurs between the roller shafts, and thread breakage easily occurs. However, in the case of the device of this embodiment, when the electromagnetic clutches 43 to 45 are kept in an excited state and the drive systems are mechanically connected while the machine base is stopped, the deviation of the twist angle between the axes is increased. This prevents thread breakage at startup. Also, the electromagnetic clutch at startup
When 43 to 45 are excited and each drive system is started in a connected state, each roller shaft is driven from both end sides, so it is opposite to the drive side of each roller shaft especially when starting after a long stop in winter. The delay of twisting on the side is prevented and the occurrence of yarn breakage is prevented.

The present invention is not limited to the above-described embodiments, and for example, a so-called spring rose type electromagnetic clutch which is held in a disengaged state when energized and held in a coupled state when a power failure may be used as the electromagnetic clutch. . In this case, a backup power supply for the electromagnetic clutch is unnecessary. or,
The positions of the electromagnetic clutch and the continuously variable transmission arranged between the respective drive systems are not limited to the positions in the above-mentioned embodiment, but may be changed to any positions capable of connecting the respective drive systems. Furthermore, the structure of the present invention may be adopted in a design yarn manufacturing apparatus that continuously changes the rotation ratio of the draft roller. In this case, the continuously variable transmission may be shift-controlled in response to the continuous change of the rotation ratio of the draft roller, but in order to reduce the number of times of the shift control, the continuous change of the rotation ratio of the draft roller is performed. May be calculated, and the continuously variable transmission may be shift-controlled in accordance with the average rotation ratio.

[Effects of the Invention] As described in detail above, according to the present invention, during the operation of a spinning machine that employs a configuration in which a plurality of drive systems that need to be driven in synchronization with each other are driven by separate drive motors, respectively. When the power supply to each drive motor is stopped due to an abnormal situation, the machine base is stopped while each drive system is mechanically connected, so it is possible to reliably prevent the occurrence of yarn breakage during an abnormal stop. , Even when using an emergency battery, the battery can have a small capacity as long as it has enough power to keep the electromagnetic clutch in the excited state. Further, in addition to the above effects, the device according to the second aspect makes it possible to start the operation in a state in which the synchronism of each drive system is secured by starting the operation with the electromagnetic clutch in the connected state at the time of starting, It is possible to prevent the occurrence of yarn breakage at startup.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a first embodiment in which the present invention is embodied in a roving frame, and FIG. 2 is a schematic view showing an embodiment in which the present invention is embodied in a ring spinning frame. Main motor 2 as drive motor, variable speed motor 15, continuously variable transmission 22, 37 to 39 as mechanical transmission, input shaft 23, output shafts 25, 40 to 42, detectors 27, 28, 49 to 54 , Electromagnetic clutch 26,
43 to 45, control device 55, C, motor M, drive motors M1 to M3.

Claims (2)

(57) [Claims] 1. A spinning machine having a plurality of drive systems which are required to be stopped synchronously with each other when stopped, wherein the drive systems are driven by separate drive motors, and each drive system is shifted by a motor. The mechanical transmission whose ratio is changed is connectable via an electromagnetic clutch, and the electromagnetic clutch is held in a disengaged state during normal operation and the rotational speeds of shafts connectable by the electromagnetic clutch are the same. A method for driving a spinning machine, wherein the dynamic transmission is gear-shift-controlled, and when the drive motors of the respective drive systems are de-energized, the electromagnetic clutch is brought into a connected state to connect the respective drive systems. 2. A spinning machine having a plurality of drive systems which are required to be stopped synchronously with each other when stopped, and a drive motor provided for each drive system and provided between the drive systems. A transmission mechanism including a mechanical transmission whose speed ratio is changed by a motor and an electromagnetic clutch, a control device that drives and controls each of the drive motors based on a predetermined setting program, and both of which are engaged and disengaged by the electromagnetic clutch. A detector for detecting the number of rotations of each shaft, and a control device for inputting a detection signal of the detector and drivingly controlling the motor of the mechanical transmission so that the difference in the number of rotations of both shafts becomes zero. And a drive for a spinning machine.