JPH0647027Y2 - Pile yarn tension control device for pile loom - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pile yarn tension control device for a pile loom.

2. Description of the Related Art In a pile loom, the tension of the pile yarn is maintained at one reference tension by drivingly controlling the rotation of the beam of the pile yarn with a motor. Further, since the pile yarn is fed out at a high speed when forming the pile and cannot be followed only by the drive control of the motor, a tension roller having a large movement amount is provided between the beam of the pile yarn and the opening device by a tension spring. The tension roller is arranged to compensate for the following delay by the movement of the tension roller so that the tension of the pile yarn is always kept substantially constant.

In recent years, the weaving operation of the loom tends to increase in speed, but the higher the speed, the more the inertia force of the tension roller causes the movement of the loom not to coincide with the pile formation. Fluctuations become large and pile height becomes uneven.

Means for Solving the Problems A pile yarn tension control device for a pile loom according to the present invention comprises:
A motor for rotating the beam of the pile yarn, a motor control unit for controlling the rotation of the motor, a pile yarn tension sensor, a pattern signal generating unit, and a first reference tension signal set corresponding to the pile weaving unit. A first reference tension setting section for giving, a second reference tension setting section for giving a second reference tension signal larger than the first reference tension set corresponding to the border weaving section, and a pile weaving signal from the pattern signal generating section. Control for selectively comparing and calculating the tension detection signal from the pile yarn tension sensor and the first and second reference tension signals according to the border weaving signal, and outputting a control command signal to the motor control unit based on the calculation result. It is characterized by having a functional part.

In the pile weaving section, the tension of the pile yarn is reduced to reduce the movement amount of the tension roller. In the border weaving section, the tension of the pile yarn is increased to prevent the pile yarn from being pulled out excessively during beating.

Example 1st Example As shown in FIG. 1, in this 1st Example, roughly,
The pile yarn tension adjusting unit 1, the pile yarn tension sensor 2, the pattern signal generating unit 3, and the control function unit 4 are provided.

The pile yarn tension adjusting section 1 adjusts the tension of the pile yarn P to a target value, and in the first embodiment, it is composed of a motor for rotationally driving the beam 5 of the pile yarn P. The motor 1 is attached to the side frame 6 of the loom.
A worm gear 7 as a drive gear is attached to the output shaft of the motor 1. The worm gear 7 is meshed with a worm wheel 8 as a driven gear mounted on the beam 5.

The pile thread tension sensor 2 detects the tension T of the pile thread P fed from the beam 5 to the heald 12 side through the reversing roller 9, the tension roller 10, and the lead 11, and the amount of electricity corresponding to the tension T is detected by the tension detection signal Q. _Which is output as ₂ ,
Specifically, it is attached to the tension spring 13.
The tension spring 13 is moored across the side frame 6 and a tension arm 15 attached to the side frame 6 by a pin 14 so as to be movable in the front-rear direction, and urges the tension roller 10 in a direction to give a tension T to the pile yarn P. It is a thing.

The pattern signal generator 3 is pre-programmed with a weaving pattern required for the woven fabric 16 to be woven, and outputs a pattern signal Q _{3 according} to this program to the control function unit 4. The pattern signal Q ₃ is composed of a pile weaving signal Q _3-1 for the weaving operation of the loom weaving the pile weaving section and a border weaving signal Q _{3-2 for the} weaving operation of weaving the border weaving section.

The control function unit 4 sets the tension T detected by the pile yarn tension sensor 2 according to the pile weaving signal Q _3-1 and the border weaving signal Q _3-2 from the pattern signal generating unit 3 and the preset first and second values. The reference tensions T ₁ and T ₂ are selectively compared and calculated, and the pile yarn tension adjusting section 1 is driven and controlled based on the calculation result.
Specifically, the first reference tension T ₁ is the target tension of the pile yarn P when weaving the pile weaving section, and is stored in the first reference tension setting section 20. The second reference tension T ₂ is the target tension of the pile yarn P when weaving the border weaving section,
It is stored in the second reference tension setting unit 21. 1st reference tension T ₁
Is set to a value smaller than the second reference tension T ₂ (T ₁ <
T ₂ ). Then, the control function unit 4 includes the pattern signal generation unit 3
When the pile weaving signal Q _3-1 is received from
The detected tension T corresponding to the tension detection signal Q ₂ and the first reference tension T ₁ corresponding to the first reference tension signal Q ₂₀ from the first reference tension setting section 20 are compared and calculated, and the calculation result (T−T ₁ = ΔT)
Control command Q _4-1 times the predetermined coefficient [Delta] K ₁ to (= K ₁ · ΔT)
Is output to the electric power control unit 22 of the motor to perform feedback control so that the difference between the detected tension T and the first reference tension T ₁ becomes zero, while the pattern weaving signal Q _3-2 is sent from the pattern signal generating unit 3. In the received state, the detected tension T and the second
The second reference tension T ₂ and by comparison operation corresponding to the second reference tension signal Q ₂₁ from the reference tension setting unit 21, the calculation result (T-
Control command Q _4-2 (= T ₂ = ΔT) multiplied by a predetermined coefficient ΔK ₂
K ₂ · ΔT) is output to the control unit 2, and feedback control is performed so that the difference between the detected tension T and the second reference tension T ₂ becomes zero. The coefficients ΔK ₁ and ΔK ₂ have a relationship of ΔK ₁ > ΔK ₂ .

Reference numeral 25 is a yarn beam, and 26 is a motor that is attached to the side frame 6 to form a warp tension adjusting unit. A worm gear 27 attached to the output shaft of the motor 26 is attached to a worm wheel 28 attached to the yarn beam 25. The warp tension sensor 30 assembled around the back roller 29 detects the tension of the warp Y, and the detected warp tension is taken into the control unit 31 of the motor 26.
The preset warp reference tension and the detected warp tension are compared and calculated, and the motor 26 is drive-controlled so that the detected warp tension and the reference warp tension become zero based on the calculation result. 32 is a breast beam, 33 is a press roller,
34 is a friction roller, 35 is a guide roller, and 36 is a cross beam.

According to the above-described embodiment structure, the control function unit 4 causes the pattern signal from the pattern signal generation unit 3 to be generated by the weaving operation of the loom.
When Q ₃ is received, the woven fabric 16 which is continuously woven while the pile woven part and the border woven part are repeated is passed through the breast beam 32, the press roller 33, the friction roller 34, the guide roller 35, and the cross beam. In the case of being wound around 36, this will be described separately for the pile weaving section and the border weaving section.

In the pile weaving section, the control function section 4 receives the pile weaving signal Q _3-1 from the pattern signal generating section 3 according to the calculation result of the detected tension T from the pile thread tension sensor 2 and the first reference tension T _1. The control command Q _4-1 is output to the control unit 22 of the motor 1 early so as to increase the feed amount of the pile yarn P and reduce the movement amount of the tension roller 10.

In the border weaving section, the control function section 4 receives the border weaving signal Q _3-2 from the pattern signal generating section 3 according to the calculation result of the detected tension T from the pile yarn tension sensor 2 and the second reference tension T _2. The control command Q _4-2 is output to the control unit 22 of the motor 1 to reduce the feed amount of the pile yarn P.

In addition, as shown in phantom in FIG. 1, the side frame 6
The lead 11, the heald 12, breast beam 32, the press roller 33, the friction roller 34, guide roller 35, a front frame ₆₁ for mounting the cross beams 36 or the like, the motor 1, the beam
5, guide roller 9, tension roller 10, yarn beam 25,
It is divided into a rear frame 6 ₂ on which a back roller 29 and the like are mounted, and the front frame 6 ₁ and the rear frame 6 ₂ are assembled by a moving mechanism 50 so as to be able to come into contact with and separate from each other in the front-rear direction. The pile height can be made uniform by adjusting the tension with the warp Y.

Further, as shown by phantom lines in FIG. 1, the motor 52 is connected to the friction roller 34, and the winding of the woven fabric 16 is stopped during two picks before and after the pile yarn P is gripped in the blind beating. , Even if the pile yarn P or the warp yarn Y has a fluctuation in tension,
It is also possible to prevent slippage between the pile yarn P or the warp yarn Y and the weft yarns that are interlaced with the pile yarn P or warp yarn Y, and make the pile height uniform.

As described above, according to the present invention, in the pile weaving section, the tension of the pile thread is reduced to reduce the moving amount of the tension roller, and in the border weaving section, the tension of the pile thread is increased to increase the beating time. Since the pile yarn can be prevented from being pulled out excessively, the pile heights can be made uniform.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention. 1 ... Motor, 2 ... pile yarn tension sensor, 3 ... pattern signal generating unit, 4 ... control function unit, 10 ... tension roller (pile yarn tension adjusting unit), T ... tension (detected tension), T ₁ ... first
Standard tension, T ₂ ... 2nd standard tension.

Claims (1)

[Scope of utility model registration request] 1. A motor (1) for rotationally driving a pile yarn beam (5), and a motor control unit (22) for controlling the rotation of the motor (1).
A pile thread tension sensor (2), a pattern signal generating section (3), a first reference tension setting section (20) for giving a first reference tension signal set corresponding to the pile weaving section, and a border weaving section The second reference tension setting unit (2 that gives a second reference tension signal larger than the first reference tension set corresponding to
1), and the tension detection signal from the pile yarn tension sensor (2) and the first and second reference tension signals in response to the pile weaving signal and the border weaving signal from the pattern signal generator (3). A pile yarn tension control device for a pile loom, comprising: a control function unit (4) for performing a comparison calculation with respect to, and outputting a control command signal to a motor control unit (22) according to the calculation result.