JPH073581A - Warp tension control device - Google Patents

Abstract

(57) [Summary] [Object] To provide a warp tension control device capable of shortening the time until steady supply of warp and obtaining a woven fabric having no weaving bar. [Structure] In a warp supply device (6) for controlling the tension of a warp (4) by rotating a warp drum (5) wound with a warp (4) to be supplied to a loom, a motor command rotation speed at the time of receiving a rotation stop command of the warp drum (5) is stored. Motor command rotation speed storage unit 1
4 and a start-time motor command rotation speed generation unit 15 that generates a motor command rotation speed based on the information in the motor command rotation speed storage unit 14 at the time of starting the rotation of the warp drum 5. And

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp tension controller for controlling the tension of warps in a loom to be constant.

[0002]

2. Description of the Related Art For a loom, there is a demand for a warp supply device in which a weaving bar does not appear in a woven fabric as much as possible by starting and stopping the operation of the loom. The conventional warp tension device will be described below. Figure 2
Shows a structure of a conventional warp tension control device. In FIG. 2, reference numeral 1 denotes a loom operation control device as a constituent element, and 2
Is a loom winding device, 3 is a weft supply device, 6 is a warp drum 5, a warp tension control device 7, a warp tension detector 8 for detecting the tension of the warp 4 supplied from the warp drum 5, and a warp drum 5. The warp yarn feeding device includes a motor 9 and a position detector 10 that detects a rotational position of the motor 9.
In addition, in the warp tension control device 7, 11 is a motor rotation speed measurement unit that measures the rotation speed of the motor 9 based on the position information from the position detector 10. Reference numeral 12 is a warp tension monitor for monitoring the tension of the warp 4 from the warp tension detector 8. Reference numeral 13 denotes a motor command rotation speed generation unit that calculates a motor command rotation speed based on the tension information from the warp tension monitoring unit 12 and the motor rotation speed information from the motor rotation speed measurement unit 11. Reference numeral 16 denotes a motor control unit that reads command rotation speed information from the motor command rotation speed generation unit 13 and controls operation of the motor 9. Reference numeral 17 denotes a motor drive unit that drives the motor 9 under the control of the motor control unit 16.

Regarding the warp tension control device composed of the above-mentioned constituent elements, the relationship and operation of the constituent elements will be described below. The warp drum 5 in the warp feeder 6
The tension of the warp yarn 4 supplied from the loom winding device 2 to the loom winding device 2 is measured by the warp tension detector 8. The warp tension monitoring unit 12 in the warp tension controller 7 reads the tension information measured by the warp tension detector 8 and calculates the excessive rotation speed and the insufficient rotation speed of the motor 9 so that the tension of the warp threads 4 becomes constant. . Next, the position detector 10 measures the rotation position of the motor 9, and sends the position information to the motor rotation speed measurement unit 11 of the warp tension control device 7. The motor rotation speed measurement unit 11 calculates the motor rotation speed based on the position information from the position detector 10. The motor command rotation speed generation unit 13 calculates the motor command rotation speed from speed information of the over rotation speed or the insufficient rotation speed of the warp tension monitoring unit 12 and the motor rotation speed from the motor rotation speed measurement unit 11.

When there is a request for the loom operation, the motor control section 16 reads the operation control input from the loom operation control apparatus 1 and sets the operation condition of the motor command rotation speed from the motor command rotation speed generation section 13. It is read and sent to the motor drive unit 17. The motor drive unit 17 drives the motor 9 based on a command from the motor control unit 16. When there is a request to stop the operation of the loom, the motor control unit 16 reads the control input for stopping the operation from the loom operation control device 1 and issues a stop command to the motor control unit 17. The motor drive unit 17 stops the motor 9 based on a command from the motor control unit 16.

By the above series of operations, the warp feeder 6
Warp 4 is being supplied to the loom steadily,
Was kept constant.

[0006]

However, in the above-mentioned conventional construction, when the warp feeder 6 is started, the warp tension detector 8 is caused by mechanical mechanisms of the loom, friction, and expansion / contraction of the yarn.
Therefore, it takes a long time until the correct tension information of the warp yarn 4 can be observed, and a long time is required until the motor command rotational speed generating unit 13 obtains the motor command rotational speed at which the warp tension becomes constant. As a result, as compared with the case where the warp yarns 4 are constantly fed, the weft yarns are displaced relative to the warp yarns 4 of the woven fabric, and there is a problem that a weft is likely to occur.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a warp tension control device that shortens the time until the warp is supplied to the loom and minimizes the weft bar. .

[0008]

In order to achieve the above object, the warp tension control device of the present invention is a warp supply device for controlling the tension of a warp by rotating a warp drum wound with a warp to be supplied to a loom. The motor command rotation speed storage unit that stores the motor command rotation speed at the time when the rotation stop command of the warp drum is received, and the motor command rotation speed based on the information in the motor command rotation speed storage unit when the warp drum rotation starts. A warp tension control device is provided which has a starting motor command rotation speed generation unit for generating and which controls a rotation speed of a motor for driving a warp drum at the time of starting the loom to a motor rotation speed immediately before the stop of the loom.

[0009]

In the above structure, the motor command rotational speed immediately before the stop of the loom is set as the motor command rotational speed at the time of starting the loom,
After that, the motor rotation speed stabilizes, and after the command rotation speed generated from the motor command rotation speed generation unit reaches the motor command rotation speed immediately before the last loom stop, the command rotation speed generated from the motor command rotation speed generation unit Is the rotation speed command. Therefore, at the start of the loom operation, even if it takes a long time until the correct tension information of the warp can be observed from the warp tension detector due to various mechanisms of the loom, friction, and expansion / contraction of the thread, the warp feeder constantly steadies the loom. It is possible to shorten the time required to reach the rotation speed of the motor that supplies the water, and to eliminate the loom generated when the loom is stopped.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The same components as those in the conventional example are designated by the same reference numerals.

In FIG. 1, reference numeral 1 denotes a loom operation control device, and 2
Is a loom winding device, 3 is a weaving yarn supply device, 4 is a warp yarn, 5 is a drum, 6 is a warp yarn supply device, 7 is a warp tension control device, and 8 is a warp tension control device.
Is a warp tension detector, 9 is a motor, 10 is a position detector, 1
1 is a motor rotation speed measuring unit, 12 is a warp tension monitoring unit, 1
3 is a motor command rotation speed generation unit, 16 is a motor control unit,
Reference numeral 17 denotes a motor drive unit, and each of these components has the same configuration as that described in the conventional example, and the description thereof will be omitted.

The characteristic configuration of this embodiment is as follows. That is, the warp drum 5 has the same structure as the conventional example described above.
The motor command rotation speed storage unit 14 that stores the motor command rotation speed at the time of receiving the stop command, and the motor command rotation speed is generated based on the information in the motor rotation speed storage unit 14 when the warp drum 5 is started. A motor command rotation speed generation unit 15 at the time of startup is provided, and the motor command rotation speed storage unit 1 is provided.
4 and the command rotation speed information from the motor command rotation speed generation section 15 at the time of startup are read by the motor control section 16 to control the operation of the motor.

The operation of the warp tension control device configured as described above when the loom is stopped will be described below.
The motor rotation speed storage unit 14 stores the motor command rotation speed generated by the motor command rotation speed generation unit 13 when receiving the operation stop control information from the loom operation control device 1. When the motor control unit 16 receives the control signal for stopping the loom from the loom operation control device 1, the motor control unit 16 sends a control command for stopping the motor to the motor driving unit 17. The motor drive unit 17 stops the motor 9 according to the control information of the motor control unit and stops the rotation of the warp drum 5 to stop the supply of the warp yarn 4 to the loom. With the above, the operation of stopping the loom operation is completed.

Next, the operation of the warp tension control device 7 at the time of starting the loom will be described. When the control information for starting the loom is input from the loom operation control device 1, the startup motor command rotation speed generation unit 15 stores the motor command rotation speed information immediately before the loom is stopped, which is stored in the motor command rotation speed storage unit 14. The motor command rotation speed at the time of starting the loom is generated from. The motor control unit 16 sends control information to the motor drive unit 17 based on the motor command rotation speed information from the motor command rotation speed generation unit 15 at startup. The motor drive unit 17 is a motor control unit 16.
The motor 9 is driven based on the command. The warp tension detector 8 measures the tension of the warp 4 supplied from the warp feeder 6 to the loom. The warp tension monitoring unit 12 reads the tension information measured by the warp tension detector 8, and calculates the excessive rotation speed and the insufficient rotation speed of the motor 9 so that the warp 4 has a specified tension. The position detector 10 measures the rotation position of the motor and sends it to the motor rotation speed measurement unit 11. The motor rotation speed measurement unit 11 calculates the motor rotation speed based on the position information from the position detection unit 10. The motor command rotation speed generation unit 13 calculates the motor command rotation speed from the excess or deficiency rotation speed of the warp tension monitoring unit 12 and the motor rotation speed of the motor rotation speed measurement unit 11. The motor control unit 16 stabilizes the rotation speed of the motor 9 based on the command rotation speed information of the motor command rotation speed generation unit 13 and the command rotation speed information from the startup motor command rotation speed generation unit 15, and the motor command rotation when the loom is stopped. The command rotation speed of the motor is determined by determining whether the speed has been reached. When the rotation of the motor 9 is stable and the command rotation speed of the motor command rotation speed generation unit 13 has not reached the command rotation speed from the startup motor command rotation speed generation unit 15, the startup motor command rotation speed generation is performed. The command rotation speed from the unit 15 is used. When the rotation of the motor 9 is stable and the command rotation speed of the motor command rotation speed generation unit 13 has reached the command rotation speed from the startup motor command rotation speed generation unit 15, the motor command rotation speed generation unit 13 command rotations. The motor control unit 16 sends motor drive information calculated from the motor command rotation speed to the motor drive unit 17. The motor drive unit 17 drives the motor 9 according to the information of the control of the motor control unit 16.

Through the above series of operations, the warp feeder 6
In a state where the warp yarns 4 start to supply the warp yarns 4 to the loom, it is possible to shorten the time required for the warp yarn supplying device 6 to reach the motor rotation speed for constantly supplying the warp yarns 4.

[0016]

As is apparent from the above description of the embodiments, the present invention supplies the warp to the loom at the beginning by supplying the warp to the loom at the command rotation speed from the start-up motor command rotation speed generator. In this state, by supplying the warp to the loom at the command rotation speed from the motor command rotation speed generator, it is possible to shorten the time until the warp supply device constantly supplies the warp, and as a result, the loom stops. It is possible to realize an excellent warp tension control device that can eliminate weaving bars.

[Brief description of drawings]

FIG. 1 is a block diagram of a warp tension control device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional warp tension control device.

[Explanation of symbols]

 1 Loom operation control device 2 Loom winding device 3 Weft supply device 4 Warp 5 Warp drum 6 Warp supply device 7 Warp tension control device 8 Warp tension detector 9 Motor 10 Position detector 11 Motor rotation speed measurement unit 12 Warp tension monitoring unit 13 Motor Command Rotational Speed Generation Section 14 Motor Commanded Rotational Speed Storage Section 15 Start-up Motor Commanded Rotational Speed Generation Section 16 Motor Control Section 17 Motor Driving Section

Claims (1)

[Claims] 1. A warp supply device for controlling the tension of a warp by rotating a warp drum wound with a warp to be supplied to a loom,
The motor command rotation speed storage unit that stores the motor command rotation speed at the time when the rotation stop command of the warp drum is received, and the motor command rotation speed based on the information in the motor command rotation speed storage unit when the warp drum rotation starts. A warp tension control device comprising: a starting motor command rotation speed generation unit for generating the rotation speed; and a control unit that sets the rotation speed of a motor that drives the warp drum at the time of starting the loom to the motor rotation speed immediately before the stop of the loom.