JP2652965B2 - Spinning machine operation control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for controlling the operation of a spinning machine such as a spinning machine or a twisting machine when power is restored after a power failure.

Conventional technology Conventionally, a countermeasure against power outage of a spinning machine has adopted a timer system using a delay release relay. If there is a longer blackout, the machine will be restarted, and if the power is restored, the machine will be stopped. When a power failure occurs in the spinning machine, power supply to the motor is interrupted and the machine enters inertia operation, and the rotational speed of the spindle gradually decreases over time. During spinning, the ring rail rises while repeating the elevating movement for forming a cup, so that the elevating movement is repeated during the coasting operation after the power failure. If the power failure time is longer than the timer set time, the motor is stopped without restarting (at the time of a power failure, control cannot be performed). When the machine stand stops, the yarn is slackened and snare is generated on the yarn. However, when the operation is started in a state where the snare is generated, a large tension acts on the yarn, and the yarn breaks frequently. The snare is generated when the rotation speed of the spindle falls below a predetermined low-speed rotation due to deceleration due to a power failure. Therefore, when restarting, thread breakage frequently occurs unless the rotation speed is higher than the rotation speed at which snare does not occur. If a power failure occurs after the machine enters the high-speed operation state, it takes about 10 seconds or more for the spindle rotation speed to drop to the predetermined low rotation speed at which snare occurs. If it is set to a few seconds, if a power failure occurs in the acceleration stage shortly after the start, there is a problem that the yarn is restarted in a state where the snare is generated in the yarn, and yarn breakage frequently occurs at the restart. Therefore, conventionally, in order to cope with the power failure during the acceleration stage, the set time can be set only for a short time of 1 to 2 seconds so that the spindle rotation speed does not fall below the predetermined low rotation speed even if the power failure occurs at the time of startup. Did not.

Problems to be Solved by the Invention In a general spinning machine, when a power failure occurs after the machine frame enters a high-speed operation state, it takes about ten and several seconds for the rotation of the spindle to reach the snare generation speed. It is possible to restart even if the power outage is longer than the instantaneous power outage of 2 seconds. However, in the above-mentioned conventional operation control device, the machine is always stopped when a power failure occurs for a short time of a short time of 1 to 2 seconds, so that unnecessary machine stop is performed, and the operation rate is reduced accordingly. was there. Especially in recent years, 25,000
Since the speed was increased to rpm, there was a problem that the ratio of unnecessary machine stoppage became more remarkable. An object of the present invention is to solve such a problem.

Means for solving the problem In a spinning machine such as a spinning machine in which a drive system is driven by a motor, a rotation detector that detects the rotation of the drive system, and a restart that does not cause thread breakage even when the drive system is restarted A setting device for setting a possible speed of the driving system, a comparing device for comparing the detected speed of the driving system detected by the rotation detector when power is restored after a power failure with the setting speed set by the setting device, and a comparing device. Output means for outputting a restartable signal for driving the motor when the detected speed is equal to or higher than the set speed.

Operation When power is restored after a power failure, the speed of the drive system at the time of power restoration is detected by the rotation detector, and this detected speed is compared with the set speed set by the setting device by the comparing means. When the speed is equal to or higher than the set speed, a restart enable signal is output from the output means, and rotation of the drive system by the motor is continued. When the detected speed is lower than the set speed, the restart enable signal is not output.

First Embodiment In FIG. 1, reference numeral 1 denotes a three-line draft roller in a spinning machine, and 5 denotes a spindle, each of which is connected to a motor M via an appropriate gear train or transmission mechanism (not shown) to form a drive system 7. 3 is a ring rail. A series of operations of the drive system 7 of the spinning machine is performed by a programmable controller PC.
The motor M is automatically performed according to a program incorporated in the controller (hereinafter, referred to as a controller), and the start and stop of the motor M are controlled by the controller PC. Controller PC
Is electrically connected to a pulse detector PG for detecting the number of rotations of the spindle 5 when the power is restored after a power failure.
The rotation speed of the spindle 5 can be arbitrarily detected from within the drive system 7, and the rotation speed may be detected from the draft roller 1 or the motor M. 10 is a keyboard that corresponds to the setting device of the present invention, even if restarting the drive system 7 rotates the spindle 5 when the power is restored after a power failure set the input rotational speed N ₁ without frequent yarn breakage. The rotational speed N ₁ is intended to be determined empirically, it is set to a speed just before Senart by the reduction of the spindle 5 by coasting operation during power failure come begins to occur, but generally for example may be set as the 1,000~2,000rpm Since it varies depending on the yarn material and the yarn count, it may be set as appropriate. An operation control device 12 is configured by the pulse detector PG, the controller PC, and the keyboard 10. Controller PC
Are programmed in advance so that when power is restored after a power failure, processing jumps to a program shown as a flowchart in FIG. In FIG. 2, the determination as to whether or not a power failure has occurred in a step is determined by the values of the latch memory and the non-latch memory in the controller PC. When the machine is operating normally, both the latch memory and the non-latch memory become "1". When the machine is stopped normally, both the latch memory and the non-latch memory become "0". And during normal operation,
Once a power failure occurs, the latch memory becomes "1" and the non-latch memory becomes "0", whereby the controller PC recognizes that a power failure has occurred after power recovery. Step is a means for picking up the rotational speed N ₂ of the spindle 5 that is detected by the pulse detector PG for rotation detected when power is restored after a power failure. Step is comparing means for comparing the rotational speed N ₁ set in advance input by the rotational speed N ₂ and a keyboard 10. Step is the result of comparison by the comparing means, N ₂
≧ If N ₁ outputs a restart enable signal, an output means for outputting a restart disabling signal if N ₂ <N _1. When the restart enable signal is output, the motor M is restarted, and when the restart disable signal is output, the machine stops. As described above, by using the controller PC, it can be easily implemented without requiring any special device.

When an operation signal is input to the controller PC, the operation control device 12 configured as described above drives the motor M to operate the spinning machine. If the rotation speed of the spindle 5 is equal to or higher than the set speed immediately after the start of the machine even if there is a power failure and the power is restored, a restart enable signal is output and the motor M is driven,
The spinning operation is started again. If the rotation speed of the spindle 5 is equal to or lower than the set speed at the time of the power failure, a restart impossible signal is output, the brake is applied to the motor M, and the machine base is stopped. Needless to say, a restart enable signal may be output when the detection speed of the drive system 7 is higher than the set speed, and a restart disable signal may be output when the detected speed is equal to or lower than the set speed. As described above, instead of making a determination based on the set time of the conventional timer, it is determined whether or not to restart based on the rotation speed of the spindle 5 at the time of power recovery. It is possible to reduce the number of weights at which the thread breaks as much as possible.
If the power goes out after the machine enters the high-speed operation from the acceleration operation, the spindle 5 drops to the set speed due to the inertial operation.
Since there is a margin of about several tens of seconds, even if the power outage is relatively long, if the rotation speed of the spindle 5 at the time of power recovery is higher than the set speed, the spindle 5 can be restarted to improve the operation rate. Can be.

Effect of the Invention In the present invention, when power is restored after a power failure, the rotation detector detects the speed of the drive system when power is restored, and compares the detected speed with the set speed so that the detected speed is greater than the set speed. When a power failure occurs during a high-speed rotation of the drive system for a relatively long time, the speed of the drive system must be higher than the set speed at which the thread breakage is not likely to occur. If the speed of the drive system at the time of power recovery after a power failure is higher than the set speed, it can be restarted and the operation operation rate of the spinning machine can be improved, and Since the motor is restarted at the time of restart, the rotational speed of the spindle at the time of restart can always be made higher than the speed of generating the snare, and the number of weights at which the thread breaks at the time of restart can be extremely reduced.

[Brief description of the drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a schematic diagram of an operation control device of a spinning machine, and FIG. 2 is a flowchart diagram of a program for performing processing by a programmable controller when power is restored after a power failure. 7: Drive system, 10: Keyboard, 12: Operation controller, M: Motor, PG: Pulse generator for rotation detection, PC
…… Programmable controller

Claims (1)

(57) [Claims] 1. A spinning machine such as a spinning machine in which a driving system is driven by a motor, a rotation detector for detecting rotation of the driving system, and a re-startable drive which is less likely to cause thread breakage even when the driving system is restarted. A setting device for setting the speed of the system, a comparison means for comparing the detected speed of the drive system detected by the rotation detector when power is restored after a power failure with the set speed set by the setting device, and a result of the comparison means, Output means for outputting a restartable signal for driving the motor when the detected speed is equal to or higher than the set speed.