JPH0797141A - Winding control method in beam machine - Google Patents

Abstract

PURPOSE:To control a rotational speed of a beam so as to uniformly rewind a warp by fixing a running speed without enlarging size and without increasing an output in a drive motor for rotating the beam. CONSTITUTION:A drive motor 5, formed so as to control a rotational speed in a rotational speed region by setting an upper limit value of the rotational speed, is connected to a beam 11 through a continuously variable transmission 15 formed so as to control a speed change in a speed change region by setting an upper limit of speed change ratio, and by controlling rotational speed control of the drive motor 5 combined with speed change control of the continuously variable transmission 15 so as to give always tension to a warp for rewinding an output transmitted to the beam 4, a rotational speed of the beam 4 is controlled without decreasing its rewinding output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding control method for a beam machine in which a warp is wound evenly around a beam.

[0002]

2. Description of the Related Art Conventionally, a beam machine keeps the traveling speed of the warp wound on the beam substantially constant from the beginning to the end of winding on the beam, and the rotational speed of the beam so that tension is constantly applied to the wound warp. In this beam machine, the rotation speed of the beam was controlled by changing the rotation speed of the drive motor or shifting the continuously variable transmission.
The motor has a characteristic that the output of the drive shaft drops sharply in the low speed range, and even in a continuously variable transmission, the transmission output to the output side drops sharply when the gear ratio is large and the output side is in the low rotation range. Since the winding speed of the beam reaches a low speed range, the winding output of the beam is drastically reduced and the tension applied to the winding warp is reduced, resulting in defective winding of the warp. In order to make up for these drawbacks, the motor had to be made larger and the output increased so that the drive shaft output would provide the necessary tension even in the low rotation range.

[0003]

SUMMARY OF THE INVENTION The present invention is directed to a beam machine in which the rotation speed of the beam is controlled so that the traveling speed of the warp threads is substantially constant without increasing the size and output of the drive motor. An attempt is made to provide a winding control method.

[0004]

SUMMARY OF THE INVENTION The present invention is based on the above-mentioned prior art, in which the rotational speed of a drive motor is simply attenuated,
In view of the problem that a large-sized and high-output drive motor is required to simply change the speed of the continuously variable transmission to control the rotation speed of the beam, the rotation speed control is performed within the rotation speed range by setting the lower limit value of the rotation speed. The drive motor is set to the upper limit of the gear ratio and connected to the beam via the continuously variable transmission that controls the gear shift in the relevant gear range, and the tension is constantly applied to the warp that winds the transmission output to the beam. In order to control the rotational speed of the beam without lowering the winding output of the beam by controlling the rotational speed control of the drive motor and the shift control of the continuously variable transmission, This is a solution to the above drawbacks.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a beam machine according to the present invention, and a beam 4 is provided between main frames 2 and sub-frames 3 on both sides of the beam machine 1.
Is rotatably installed.

Reference numeral 5 denotes a drive motor arranged in the main frame 2, which connects the drive shaft 6 of the drive motor 5 and the beam shaft 7 of the beam 4 via a transmission mechanism 8 and supplies power to the drive motor 5. Inverter that controls the inverter
Is connected and the rotation speed of the beam 4 is controlled by controlling the rotation speed of the drive motor 5 that gradually changes the frequency within a predetermined range. However, the drive motor 5 has extremely low drive shaft output in the low speed range. Since the winding output of the beam 4 is lowered, the lower limit of the frequency for controlling the inverter is set, and the rotation speed range of the drive motor 5 is limited to maintain the winding output of the beam 4.

[0007] 10 is a drive motor 5 in the main frame 2
And a sprocket 12 mounted on the output shaft 11 of the speed reducer 10 and the drive shaft 6 of the drive motor 5, respectively.
Chain 14 is suspended between 13 and.

Reference numeral 15 denotes an electric continuously variable transmission interposed between the drive motor 5 and the speed reducer 10. The continuously variable transmission 15 has a variable pitch pulley 17 on the input shaft 16 of the drive shaft 6 and the speed reducer 10, respectively. 18
When the belt 19 is suspended between the variable pitch pulleys 17 and 18 and the pitch of the variable pitch pulley 17 on the input side is narrowed, the pitch of the variable pitch pulley 18 on the output side is expanded to change the gear ratio. The variable pitch pulley 18 on the output side is equipped with a pitch changing machine 20.
Changes the pitch of the variable pitch pulley 18 according to the amount of rotation of the motor (not shown), and the motor (not shown)
A detector 21 such as an encoder for detecting the amount of rotation of is provided.

Reference numeral 22 denotes a yarn guide roll which is rotatably provided horizontally between the main frame 2 and the sub-frame 3, and the yarn guide roll is provided.
22 is arranged parallel to the beam axis 7 and is equipped with a yarn speed detector 23 such as an encoder for detecting the traveling speed of the warp yarn A when wound around the beam 4.

Reference numeral 24 is a control device such as a sequencer for controlling the inverter 9, the detector 21 of the pitch changing machine 20 and the yarn speed detector 23 of the yarn guide roll 22.

Next, the winding control method in the beam machine according to the present invention will be described. First, when the drive motor 5 is started and the beam 4 is rotated through the transmission mechanism 8, each warp thread A is guided by the thread guide rolls. Although the winding diameter of the warp A is gradually increased by being wound around the outer circumference of the beam shaft 7 while rotating 22, the running speed of the warp A is maintained at a constant speed and the tension of the wound warp A is maintained. In order to gradually reduce the rotation speed of the beam 4, the rotation speed range of the drive motor 5 and the speed change range of the continuously variable transmission 15 are limited in advance so that the winding output of the beam 4 is maintained. When the rotational speed of the drive motor 5 is gradually decreased by the gradual decrease of the frequency by 9 and the lower limit value is reached, the continuously variable transmission 15 is shifted and the rotational speed of the drive motor 5 is returned to the upper limit value. Repeated or carried and driven at the time of lowering the rotational speed of the output side reaches the upper limit by the gradual deceleration of the CVT 15 by the control device 24 in the reverse motor 5
Of the drive motor 5 and the speed change control of the continuously variable transmission 15 while gradually reducing the frequency of the continuously variable transmission 15 to the lower limit and further decelerating the continuously variable transmission 15. The control of the rotational speed of the drive motor 5 by the inverter 9 and the continuously variable transmission 15 are performed so that one is controlled and the other is controlled.
In combination with the shift control by the control, the rotation speed of the beam 4 is controlled to wind the warp yarn A.

Further, an example of the control method will be specifically described by giving numerical values, and the ratio of the winding diameter of the beam shaft 7 to the winding diameter of the warp A is 1 :.
In order to support up to 8, the rotation speed control of the drive motor 5 by the inverter 9 has an upper limit of 3600 rpm of 60 Hz, a lower limit of 1800 rpm of 30 Hz, and the drive shaft output at the lower limit of 90% of the upper limit, and continuously variable transmission. Machine 15
The speed change range is 1: 4, the transmission output at the upper limit is 90% of the lower limit, the traveling speed of warp A is constant, and the lower limit of the winding output of beam 4 is 80% of the upper limit. Makes it possible to maintain the tension of the warp thread A, and finally the rotation speed on the output side of the continuously variable transmission 15 is set to 8 at 3600 rpm.
It is necessary to set the rotation speed of the beam 4 to 1/450 rpm and the winding output of the beam 4 at that time to 80% of the upper limit. Under such preconditions, the rotation speed of the beam 4 is controlled as follows.

First, the drive motor 5 which was initially 60 Hz
The winding output of the beam 4 becomes 90% of the upper limit when the lower limit value of 30 Hz is reached and the rotational speed becomes 1800 rpm due to the gradual decrease of the power source of the controller 9.
To the pitch changer 20 of the continuously variable transmission 15 by a signal to the controller 24, the gear ratio of the continuously variable transmission 15 is set to 1: 2, and the gear shift is detected by the detector 21. When the control device 24 sends a signal to the control device 24 to send a signal to the inverter 9 to return it to the upper limit value of the frequency and to return the power source of the drive motor 5 to 60 Hz, the winding output of the beam 4 is output. It becomes about 95% of the upper limit.

Next, when the power supply of the drive motor 5 is gradually lowered to 30 Hz by the inverter control and the output side of the continuously variable transmission 15 becomes 900 rpm, the winding output of the beam 4 is 85% of the upper limit. When the speed ratio of the continuously variable transmission 15 is set to 1: 4 and the power supply of the drive motor 5 is restored to 60 Hz again by the above command system, the winding output of the beam 4 is 90% of the upper limit. When the power supply of the drive motor 5 gradually decreases to 30 Hz, the output side of the continuously variable transmission 15 becomes 450 rpm and the winding output of the beam 4 becomes about 80% of the upper limit. The winding is completed while maintaining the tension of the warp yarn A.

[0015]

In summary, according to the present invention, in a beam machine in which a beam and a yarn feed roller are rotatably arranged, the drive motor 5 is connected to the beam 4 via the continuously variable transmission 15, and the rotation speed of the drive motor 5 is increased. Of the transmission speed to the beam 4 by setting the lower limit value of the rotation speed control within the rotation speed range, and setting the upper limit of the gear ratio in the continuously variable transmission 15 within the speed change range. Since the rotation speed control and the speed change control are combined and controlled so that the warp thread A is wound around the beam 4, the rotation speed range of the drive motor 5 and By limiting the shift range of the continuously variable transmission 15 so that the drive shaft output and the transmission output can be maintained at a constant level, the individual gear ratios are reduced. To expand As a result, the winding output of the beam 4 can be maintained even if the rotational speed of the drive motor 5 is gradually decreased or the rotational speed of the beam 4 is reduced by shifting the continuously variable transmission 15 to reduce warp A. It is possible to wind the warp A uniformly by controlling the rotation speed of the beam 4 while constantly applying tension, and therefore, from the start to the end of the winding of the warp A without increasing the size of the drive motor 5 and increasing the output. The winding operation can be completed completely and accurately, and the power consumption can be reduced by reducing the output of the drive motor 5 to save energy, which is a great practical effect.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a beam machine.

FIG. 2 is a side view of the beam machine at the start of winding.

FIG. 3 is a side view of the beam machine at the end of winding.

[Explanation of symbols]

 4 beam 5 drive motor 15 continuously variable transmission

Claims (1)

[Claims] 1. A beam machine in which a beam and a yarn feed roller are rotatably arranged, a drive motor is connected to the beam via a continuously variable transmission, and a lower limit of the rotation speed of the drive motor is set to perform the rotation. Rotational speed control within several ranges,
It consists of shift control within the gear shift range by setting the upper limit of the gear ratio in the continuously variable transmission, so as to maintain the force that constantly applies tension to the warp that winds up the transmission output to the beam.
A winding control method in a beam machine, characterized in that the rotational speed control and the shift control are combined and controlled to wind the warp around the beam.