KR890004638B1 - Electromagnetic automatic tension control device of winder for sewing thread - Google Patents

Abstract

The device, capable of controlling electro-magnetically the thread tension on a winder according to the winding speed of the thread, comprises an electromagnet(3) bolted to a bracket(1) by a bolt(2), a tension control member(5) fixed to a sleeve(6), and a slidable shaft(7) having an end stopper for a spring(8). The slidable shaft may be operated to adjust the tension control member by the electromagnet working in cooperation with a speed detector for the thread being wound.

Description

Electronic tension control device for sewing winder

1 is a configuration of the tension device of the present invention.

2 is a configuration of the four-speed detection device in the present invention.

3 is a circuit diagram of an electronic device of the present invention.

4 is a schematic diagram of a tension device of a conventional winder.

* Explanation of symbols for main parts of the drawings

1 Bracket 2 Bolt

3: electromagnet 4: insertion hole

5: tension control pressure port 6: alumina shaft

7A: snap ring 8: weak spring

9: sensing ring 11: rotating vertical axis

12 photointerrupter 12a light emitting unit

12b: light receiver R1-R19: resistance

VR1, VR2: Variable resistor D: Photodiode

TR1: Light receiving transistor TR2, TR3: Transistor

IC1: Summit trigger integrated circuit IC2: Timing integrated circuit

IC3-IC6: OP Amp LED1, LED2: Light Emitting Diode

C1-C5: Capacitor

The present invention relates to an electronic automatic tension control device of a sewing winder using an electronic method to detect the winding speed of the thread when the winder winds up the thread, and automatically adjusts the tension applied to the thread in response to the firing speed. The purpose is to control.

Conventional tension device is a coarse mechanical sensing device in the way of winding a certain amount of fixed tension at the beginning of the winding by using the elasticity of the spring or the gravity of the weight and the method of being pushed back according to the wound volume (diameter) of the yarn. Although a tension device for automatically adjusting the tension of a thread by mechanically connecting it is known, the former has a relatively high speed when the volume increases according to the amount of winding. The tension is weakly applied, and the part wound initially is tightened due to the contradiction of hard winding, and the shape is poor, resulting in loss of product value. In the latter case, the tension is controlled by mechanical sensing and adjusting devices. As there is a problem such that a lack of accurate tension capability and susceptibility of the sasok or thickness or volume tetramer (volumes) of silol.

In view of the above problems, the present invention responds to the thickness and winding amount (volume) of the silol by varying the variable resistor at the beginning of winding as desired by the user so that the tension is automatically attenuated according to the firing speed electronically. In order to become an ideal winding method, the tension device of the present invention will be described in detail with reference to the accompanying drawings.

In constructing the electronic automatic tension control device of the sewing winder, one side of the electromagnet 3 is fixed to the bracket 1 through which the bolt 2 is screwed through, and the thread insertion hole 4 is formed on the other side. Insert and fix the tension adjusting pressure port (5) to the alumina shaft tube (6) so that the flow shaft (7) where the snap ring (7a) is sandwiched close to the end of the bolt (2) into the alumina shaft tube (6). The tube is inserted into the flow material and tangled with the weak spring 8 but integrally with the detection ring 9 interlocked with the threaded pressure hole 4 and the shielding blade 10 on the rotating longitudinal axis 11 to photo-interrupter 12. Referring to the circuit structure of the present invention, the infrared light is repeatedly cut off and passed while rotating between the light emitting unit 12a and the light receiving unit 12b of the resistor R1 connected to the power supply Vcc as shown in FIG. A typical port interrupter 12 composed of a photodiode D and a resistor (R2) and a light receiving transistor TR1 is connected with a resistor R4. Trigger terminal 2 of timing integrated circuit Ic2 (with a built-in timing circuit) connected to the input side of the summit trigger integrated circuit Ic1 via a capacitor C1, and connected with a resistor 7 and a capacitor C3. Is connected to the output side of the above-mentioned timing integrated circuit (Ic2), while the capacitors (C2) and resistors (R5) and (R6) applied to the output side are connected to the output side of the above-mentioned timing integrated circuit (Ic2). (C5) is connected to the OP amplifier (IC3) (IC4) and its output is connected to the electromagnet (3) via the transistor (TR2) (TR3), the input terminal of the timing integrated circuit (Ic3) + The variable resistors VR1 and VR2 are connected to the input terminals, respectively, and the op amps IC5 and IC6 connected to the light emitting diodes LED1 and LED2 are respectively connected to the output terminals. An aluminum plate, 14, is a yarn The following describes the operational effects of the present invention constructed as described above.

As shown in FIG. 2, the yarn is first wound on the sensing ring 9, and then the thread is inserted into the thread insertion hole 4 of the tension adjusting pressure port 5 of FIG. 1, and then into a bobbin (not shown) inserted in the winding shaft. When the thread is wound and rotated, the shielding blade 10 fixedly attached to the rotary longitudinal axis 11 rotates as the sensing ring 9 rotates, thereby exiting the photodiode D of the light emitting part 12a of the photointerrupter 12. Infrared light repeats blocking and passing.

)가 발행한다. 이는 저항(R4)과 콘덴서(C1)의 시정수에 따라 잡음이 제거된 톱니파 모양으로 시미트 트리거 집적회로(IC1)의 입력에 가해져서 그의 출력측에는 방향이 반전된 깨끗한 구형파펄스(

)가 생긴다.At this time, the collector of the light receiving transistor TR1 of the light receiving unit 12b has a sawtooth pulse in the + pole direction (

Will be issued. It is a sawtooth wave shape with noise removed according to the time constants of the resistor R4 and the capacitor C1, which is applied to the input of the shimit trigger integrated circuit IC1, and its output side has a clean square wave pulse whose direction is reversed.

)

)로 만들어 타이밍집적회로(IC2)의 트리거단자(2)에 인가시켜 저항(R7)과 콘덴서(C3)의 시정수에 따라 일정한 시간의 듀티 사이클(DUTY CYCLE)을 가진 +극 방향의 구형파(

)를 만들어낸다.This is done by a capacitor (C2) and a resistor (R5) (R6), which is a very short trigger pulse (

Square wave in the + pole direction having a duty cycle (DUTY CYCLE) of a certain time depending on the time constant of the resistor (R7) and the capacitor (C3) by applying it to the trigger terminal (2) of the timing integrated circuit (IC2).

)

Since the square wave is represented by the same number of revolutions of the sensing ring 9 by the four-speed, it is integrated into the resistor R8 and the condenser C4, and the DC is proportional to the number of pulses, that is, the number of revolutions of the sensing ring 9. The voltage appears, and when this is smoothed again with the resistor R9 and the capacitor C5, a clean DC voltage proportional to the four speeds is generated.

When this voltage is input to the negative input terminal of the OP amplifier IC3, a predetermined ratio is determined by the resistor R10 and the variable resistor VR1 corresponding to the voltage divided by the variable resistor VR2 and the resistor R11 of the + input terminal. Is amplified and is inversely proportional to the voltage of capacitor C5 at the output side of OP amplifier IC3.

That is, as the rotation speed of the sensing ring 9 increases as the firing speed increases, a lower voltage appears at the output terminal of the OP amplifier IC3.

At this time, after adjusting the variable resistor VR1 to an arbitrary position and adjusting the zero point to cause the light emitting diode LED1 connected to the OP amplifier IC5 to be variable with the variable resistor VR2, the resistance value of the variable resistor VR1 is thereafter. As a ratio to, the output voltage of the OP amplifier IC3 is attenuated with the dead speed.

In addition, since the attenuation rate can be adjusted by adjusting the variable resistance VR1, the reduction of tension can be applied to the winding volume given as a task, so the winding up work by the ideal tension can be achieved.

When the output voltage of the OP amplifier IC3 is input to the + input terminal of the OP amplifier IC4, the current is amplified by the transistors TR2 and TR3 so that the load electromagnet 3 is not affected by external voltage fluctuations. Since a voltage equal to the + input voltage of IC4) is applied, that is, a magnetic force is inversely proportional to the dead flux, the flow shaft supported by the weak spring 8 pulled by the magnetic force of the magnetized bolt 2 as shown in FIG. (7) retreats slowly due to the damping of magnetic force to obtain the desired tension. That is, when the thread is initially wound by the frictional tension caused by the pressure of the weak spring 8, and the winding volume gradually increases, the yarn speed and tension also increase in proportion to this, and the sensing ring 9 of FIG. As the output voltage of the OP amplifier IC3 is relatively lowered, the tension control pressure port 5 gradually retreats due to the magnetic force inversely proportional to the four-speed in the electromagnet 3, so that the thread inserted into the thread insertion hole 4 is reduced. Tension is winding work done throughout the company while maintaining its original state.

Here, the light emitting diode LED1 connected to the OP amplifier IC5 indicates that the thread tension is maximum, and the light emitting diode LED2 connected to the OP amplifier IC6 indicates that the thread tension is reduced to the minimum.

However, when one side of the resistor R5 arrowed in FIG. 3 is a reset input terminal and it is connected to an external circuit and grounded when not winding, the output terminal 3 of the timing integrated circuit IC2 is always supplied with a power supply voltage. (Vcc) is maintained, so that no voltage is applied to the electromagnet, so it is possible to prevent truncation since the tension is not suddenly applied to the thread when starting suddenly during stop as well as electricity saving.

In this way, the present invention, which automatically adjusts the tension of the thread by the electronic method and maintains the constant flux regardless of the volume of the thread wound on the bobbin, enables the winding operation without difficulty. It is a revolutionary invention that can mass-produce extremely good and expensive goods, not only prevent the cutting of the sewing machine in advance, but also automatically adjust the winding speed according to the amount of winding regardless of the thickness of the thread.

Claims (2)

In constructing the electronic tension control device for the sewing winder, one side of the electromagnet 2 is fixed to the bracket 1 through which the bolt 2 is screwed through, and the thread insertion hole 4 is formed on the other side. Install the tension control pressure port (5) as possible, but install the flow shaft (7) supported by the weak spring (8) in close proximity to the end of the bolt (2), the photo interrupter (12) and the shield blade (10) ) And an automatic tension control device for a sewing machine winder installed by interlocking a four-speed detection device consisting of a sensing ring (9) with the tension control pressure port (5). In constructing the control circuit of the automatic tension adjusting device, a conventional port interrupter 12 including a resistor R1, a photodiode D, a resistor R2, R3, and a light receiving transistor TR1 is installed in the four-speed sensing device. ) Is applied to the timing integrated circuit IC2 to which the resistor R7 and the capacitor C3 are connected via the shim trigger integrated circuit IC1, and the output thereof is supplied to the resistors R8 (R9) and R10 and the capacitor ( C4) (C5) is connected to the OP amplifier (IC3) (IC4) so that a low voltage appears at the output terminal of the OP amplifier (IC3) as the firing speed increases, and the output of the OP amplifier (IC4) for the current amplification By connecting and configuring the electromagnet 3 via transistors TR2 and TR3, the electromagnet of the sewing machine winder is made to automatically adjust the tension of the tension control pressure port 5 due to the magnetic force inversely proportional to the dead flux. Tension control device.

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