JPH02154015A - Covering machine - Google Patents

Abstract

PURPOSE:To facilitate the removal of defect yarn generated by power failure at the automatic restart of the machine in the recovery from the power failure by providing specific particular transmission lines to power inverters of a spindle motor and a motor for driving peripheral apparatuses. CONSTITUTION:A stop signal is transmitted from a power failure detector to the 1st and the 2nd transmission lines 6,7 at the outbreak of power failure. The 2nd transmission line 7 transmits the stop signal to an inverter 4 for a peripheral motor to stop the motion of the peripheral motor 3 and the feed of a core yarn 14. At the same time, the 1st transmission line 6 also tries to transmit the stop signal to the inverter 2 for DDSP (direct drive spindle motor), however, the time to the stop of DDSP by the inverter 2 is prolonged by the stop speed setter 8 inserted in the line. Accordingly, a winding yarn 10 is wound round a part of a core yarn 14 to form an incidental looping mark on the core yarn. The removal of defective yarn can be easily carried out by the mark.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a covering machine using a direct drive spindle motor, and particularly to a covering machine suitable for easily removing defective yarns during a power outage.

[Conventional technology]

Conventional direct drive spindle motor (hereinafter referred to as r
DDsP”. ), the process of removing defective yarn in the event of a power outage involves decelerating and stopping the DDSP and the motor for driving peripheral equipment (hereinafter referred to as the "peripheral motor") while keeping the speed ratio synchronized. In order to
It is called an invertano. , ) and a DC section of a peripheral motor drive inverter (hereinafter referred to as "peripheral motor inverter"), so that they can mutually supply regenerative energy.

In other words, as shown in FIG. By coupling via the gate control device 17, it is possible to transfer regenerative energy, and while maintaining the same gate between the DDSP 1 and the peripheral motor 3,
It is configured to stop in the event of a power outage.

In addition, as related to this type of device, Japanese Patent Application Laid-Open No. 1983
-155729 and the like.

[Problem to be solved by the invention]

The above-mentioned conventional technology does not use a DDSP and has a control system that decelerates and stops the DDSPI and the peripheral motor 3 while maintaining synchronization at regular times in order to perform the same operation as a covering machine using a belt-driven spindle. As a result, the control system inevitably becomes complicated, such as by transferring regenerative energy (power) between the DDSP inverter 2 and the peripheral motor inverter 4.

Now, when considering how to dispose of defective yarns when a power outage occurs in the control system of a conventional covering machine, the yarns are classified as follows depending on the state of the power outage.

(1) Short-term power outage is called instantaneous power outage.
Since it is synchronized and enters deceleration mode, the quality of the covering yarn produced will not be affected even if operation continues automatically after the power is restored.

2) Medium to long-term power outage: In this mode of power outage, even if deceleration is synchronized, the spindle rotation will be too low when the power is restored, the thread tension will be weakened, and the quality of the thread will not be maintained. In addition, the pitch of the winding thread may be shifted, etc.
It is extremely difficult to detect yarn defects in subsequent processes, and if the operation continues automatically, defective yarns will be mixed in. Therefore, the machine must be completely stopped and workers must remove the defective yarns in order to restart the machine. mode that must be performed.

In other words, the synchronous deceleration operation during a power outage is effective only in mode (1), and is completely useless in mode (2).

In addition, when using a belt-driven spindle without using DDSP, the spindle and peripheral equipment are always synchronized through mechanical coupling due to the equipment configuration, so there is no need to add special elements for use during power outages. Ta.

However, in a conventional covering machine using DDSP, in order to reproduce the function of a covering machine using a belt-driven spindle, processing is performed only in very limited cases such as mode (1) above. This means that a complex control system has been constructed.

The purpose of the present invention is to solve the problems of the prior art and to
Regardless of the power outage in Nagato, even if it restarts automatically after the power is restored,
To provide a covering machine capable of removing defective yarns caused by a power outage and also capable of facilitating vote counting in a control system.

[Means to solve the problem]

In order to achieve the above object, the present invention is configured to be able to mark defective yarns generated when a power outage occurs so that they can be removed in a subsequent process.

That is, the present invention is based on il! A power outage detector at the source and a stop command from this power outage detector are sent to the DD via a stop speed setting device.
A first transmission line that sends to the SP inverter and a second transmission line that sends the stop command from the power failure detector directly to the peripheral motor inverter are provided.

[Effect]

In the present invention, when a power outage occurs, the power outage detector operates as the first power outage detector. Issue a stop command to the second transmission line.

At this time, the second transmission line directly transmits a stop command to the peripheral motor inverter to stop the peripheral motor. This causes the covering machine to stop feeding the yarn.

The first transmission line also tries to transmit a stop command to the DDSP inverter at the same time, but the stop speed setter installed in the middle limits the speed at which the DDSP is stopped by the DDSP inverter. In other words, by setting the stop time of the DDSP to be longer than the stop time of the peripheral motor using the stop speed setting device, it becomes possible to rotate the DDSP even after the feeding of the yarn has stopped, making it possible to make marks with balls of yarn. . This makes it possible to mark defective yarns caused by power outage, and as a result, it becomes possible to remove defective yarns in subsequent processes.

Therefore, in the present invention, regardless of whether there is a short-term or long-term power outage, even if the machine is automatically restarted after 111 calls, defective yarns caused by a power outage can be removed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of the embodiment shown in FIG. be.

The covering machine of the embodiment shown in FIG.
A PI, a DDSP inverter 2 that drives the PI, a peripheral motor 3, an inverter 4 for the standby motor that drives the PI, a power supply 9, a power failure detector 5 that detects a power outage of the power supply 9, and a power outage detector 5 that detects a power outage of the power supply 9. A first transmission line 6 connecting the detector 5 and the DDSP inverter 2;
, and a second transmission line 7 connecting the power failure detector 5 and the peripheral motor inverter 4.

A bobbin on which a winding thread 10 is wound is attached to the DDSP 1. Then, the core yarn 14 passes through the feed roll 16, passes through the hollow hole of the DDSP 1, is wound with the winding yarn IO, and is wound around the bobbin 13 by the touch roll 12.

The peripheral motor 3 drives the feed roll 15, touch roll 12, etc. via a mechanical transmission mechanism 11 such as a timing belt or gears.

Power is supplied to the DDSP inverter 2 and the peripheral motor inverter 4 from the same power source 9.

The stop command from the power failure detector 5 is directly transmitted to the peripheral motor inverter 4 through the second transmission line 7,
The signal is transmitted to the DDSP inverter 2 via a first transmission line 6 and a stop speed setter 8.

The stop speed setting device 8 sets the stop time of the DDSP 1 to be longer than the stop time of the peripheral motor 3, rotates the DDSP 1 even after the feeding of the yarn 14 is stopped, and keeps the yarn 1 wound around the yarn 14.
0 is wound to form a mark 16 ( ).

The covering machine of the above embodiment is controlled and operated as follows.

That is, when a power outage occurs, a stop command is transmitted from the power outage detector 5 to the peripheral motor inverter 4 through the second transmission line 7, and the peripheral motor 3 is immediately stopped and the feeding of the yarn 14 is stopped. Further, the stop command from the power failure detector 5 is also transmitted to the DDSP inverter 2 via the first transmission line 6, but the stop speed setting device 8 provided in the middle of the first transmission line 6 Since the stopping speed of DDSP 1 is delayed by , a mark 16 is formed in which the winding yarn 10 is thickly wound around the core yarn 14.

As is well known, a device that detects the difference in yarn thickness and removes the yarn before and after the difference in yarn thickness is already in use in ring spinning machines, etc., and by attaching a thick mark 16 to the core yarn 14, it is possible to detect a power outage. Defective yarns caused by this can be automatically removed in a subsequent process.

Next, FIG. 3 is a block diagram showing another embodiment of the present invention.

In the covering machine of the embodiment shown in FIG.
An overvoltage discharger 20 is added to the SP inverter 2.

Compared to the peripheral motor 3, if the DDSP 1 has a large inertia and a high speed, the stop speed setter 8 and the DDSP inverter 2 alone will consume the recovered energy generated by the DDSP 1 + R). Because I can't do it, this third
In the embodiment shown in the figure, regenerative energy is consumed by the overvoltage discharger 20 to create a mark 16 at the setting point.

FIG. 4 is a block diagram showing a different embodiment of the invention.

In the covering machine of the embodiment shown in FIG. 4, a limiter 21 is provided on the output side of the power failure detector 5.
The system is configured not to issue a stop signal in response to a power outage within the permissible power outage time of the DDSP inverter 2 and the peripheral motor inverter 4.

As long as the DDSP inverter 2 and the peripheral motor inverter 4 are within the allowable power outage time, the DDSP inverter 2 and the peripheral motor inverter 4 can continue to operate normally, so the quality of the yarn is not adversely affected. Therefore, within the allowable power outage time of the DDSP inverter 2 and the peripheral motor inverter 4, it is wasteful to make the mark 16 on the core yarn 14 and remove the normal yarn in a subsequent process.

Therefore, in the embodiment shown in FIG. 4, the limiter 21@
59, a stop command is not sent to the DDSP inverter 2 and the peripheral motor inverter 4 when there is no need to make the mark 16, and the removal of normal yarns in the subsequent process is reduced.

〔Effect of the invention〕

According to the present invention described above, the occurrence of a power outage is detected by the power outage detector, and the power outage command from the power outage detector is directly sent to the peripheral motor inverter through the second transmission line, and the power outage command is sent directly to the DDSP inverter. The data is sent via the first transmission line and the stop speed setter, and when a power outage occurs, the stop speed setter sets the DDSP stop time longer than the stop time of the peripheral motors.
Even after the yarn feeding has stopped, the DDSP can be rotated and marks can be made with yarn balls, so it is effective in automating the removal of defective yarns due to power outages, regardless of short-term or long-term power outages. Furthermore, the work that previously relied on manual labor to remove defective threads after the machine stops during a medium- to long-term power outage can be fully automated, which has the effect of reducing the number of personnel and man-hours required to operate the covering machine.

Further, the present invention has the effect of simplifying the control system, since the voltage adjustment of the DDSP inverter and the peripheral motor inverter and the same gate control device, which were conventionally necessary, are no longer necessary.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of the embodiment shown in FIG. FIG. 3 is a block diagram showing another embodiment of the invention, FIG. 4 is a block diagram showing another embodiment of the invention, and FIG. 5 is a block diagram showing a conventional technique. 1... DDSP, 2... DDSP inverter, 3
... Peripheral motor, 4... Inverter for peripheral motor,
5... Power outage detector, 6, 7... 1st. Second transmission line, 8...Stopping speed setter, 9...Power supply, 10.
... Wrapping thread, 14... Core thread, 16... Mark, 20
...Overvoltage discharger, 21...Limiter. Figure 37 $4

Claims (1)

[Claims] 1. In a covering machine having a direct drive spindle motor, an inverter for driving this, a motor for driving peripheral equipment, and an inverter for driving this,
a power outage detector; a first transmission line that sends a stop command from the power outage detector to the inverter for driving the direct drive spindle motor via a stop speed setter; and a stop command from the power outage detector. and a second transmission line that directly sends the inverter to the inverter for driving the motor for driving the peripheral equipment.