KR900008461Y1 - Screw automatic provision control circuit - Google Patents

Abstract

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Description

Screw automatic feed control circuit

1 is a block diagram of the present invention.

2 is a detailed circuit diagram of FIG.

* Explanation of symbols for main parts of the drawings

10: detection unit 20: first control signal generator

30: second control signal generator 40: supply control unit

The present invention relates to an automation circuit, and more particularly to a circuit capable of supplying parts at precise intervals to the automation equipment for fastening the screw.

In the conventional method of supplying a screw to a screw fastening device, since the screw is supplied to the driver one by one by hand, it takes a lot of time when it is fastened to the screw, and the fastening state of the screw is not constant. It was degraded and there was a problem that its own loss occurs.

Therefore, an object of the present invention relates to a circuit that can supply one by one to the automatic screw driver at precise intervals when the screw is fastened with the automatic screw driver.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a block diagram of the present invention, a sensing unit 10 for detecting a movement of a screw, a first control signal generator 20 for controlling a relay contact according to the output of the sensing unit 10, and A second control signal generator 30 which is switched by an output of the first control signal generator 20 to output a screw supply presence determination signal and a feeding time, and an output of the second control signal generator 30. It is configured by the supply control unit 40 is switched by the output of the screw supply signal.

The block diagram of the present invention is explained by the above configuration.

Each time the screw passes through the sensing unit 10, the sensing unit 10 senses the movement of the screw, and this signal is input to the first control signal generator 20 and switched to switch the first control signal by the switching control signal. The driving of the relay of the generator 20 is controlled.

The first control signal generated according to the relay operation of the first control signal generator 20 is input to the second control signal generator 30, and when the relay operates, the second control signal generator 30 controls the second control. A predetermined pulse, which is a signal, is generated and a relay of the supply control unit 40 is driven by the second control signal to drive a screw driver that supplies the screw during the second control signal period, thereby feeding the screws one by one. Done.

FIG. 2 is a circuit diagram of FIG. 1, which includes a sensing unit 10 including light emitting diodes LD, phototransistors PD, and resistors R1-R2, resistors R4-R7, capacitors C1, and buffers. (B1), a first control signal generator 20 composed of a transistor (Q1-Q2), a diode (D1) and a first relay (LY1), a relay contact (RC), a resistor (R8-R12), a variable resistor (VR1) Second control signal generator 30 composed of capacitor C2-C3 and monostable multivibrator M1, resistor R13, diode D2, transistor Q4 and second relay LY2. It is composed of a supply control unit 40 consisting of.

Here, the first power supply V1 is a circuit supply power supply, the second power supply V2 is a supply source of the relays LY1-LY2, and the light emitting diode LD and the phototransistor PD are sensors for detecting the movement of the screw. The relay LY1 controls the relay contact RC, NO of the relay contacts RC is a normally open terminal, and is connected to the first power supply V1, and NC is grounded as a normal clase terminal. It is grounded and the 2nd relay LY2 controls the feeder which supplies a screw one by one.

In describing the present invention in detail based on the above-described configuration, first, a case in which a screw is fed and a sensor detects a state at a mid point A between the light emitting diode LD and the phototransistor PD will be described.

When the sensor detects the movement of the screw, the phototransistor PD is turned off because the signal emitted from the light emitting diode LD does not reach the phototransistor PD.

By turning off the phototransistor PD, the transistors Q1-Q2 are also turned off so that the second power supply V2 does not flow through the first relay LY1 and the second power supply V2 flows through the first relay LY1. Due to this failure, the relay contact RC is connected to the grounded NC terminal by the first relay LY1 to turn off the transistor Q3.

When the transistor Q3 is turned off, the "high" signal of the first power supply V1 is input to the B input terminal of the monostable multivibrator M1, and the "low" signal is input to the A1 and A2 input terminals. The "low" signal is output from the output terminal Q of the stable multivibrator M1. Transistor Q4, which inputs to the output " low " rate base of the monostable multivibrator M1, is also turned off to fail to drive the second relay LY2, thereby stopping screw feeding of the driver.

The monostable multivibrator M1 uses 74 LS121, which is used for general purposes, and the inputs and outputs thereof are as shown in Table 1.

TABLE 1

Secondly, a state in which the sensor detects that the screw is moved to the passing point B at the intermediate point A between the light emitting diode LD and the phototransistor PD is described.

When the screw is moved from the point A of FIG. 2 to the point B, the light emitting signal of the light emitting diode LD is applied to the base of the phototransistor PD1, so that the phototransistor PD is turned on to emitter terminal. Signal, which is applied across the resistor R4 and the capacitor C1 to the base of the transistor Q1 to turn on the transistor Q1.

When the transistor Q1 is turned on, a "high" signal is output to the emitter terminal. The "high" signal is applied to the base of the transistor Q2 through the buffer B1 to turn on the transistor Q2. Since the power supply V2 turns on the first relay LY1 and the transistor Q2, the second supply power supply V2 flows through the collector-emitter of the first relay LY1 and the transistor Q2, and thus the relay contact ( The common terminal COM of RC is connected to the NO terminal so that the first power source V1 is applied to the base of the transistor Q3 at a partial voltage of the resistors R8-R9, and the transistor Q3 is turned on by this signal. .

When the transistor Q3 is turned on, a " low " signal is input to the B input terminal of the monostable multivibrator M1 for inputting the first power supply V1 through the variable resistor VR1 and the resistor R11. A high signal is input to the input terminal and a pulse having a predetermined time is output to the output terminal Q. The time for generating the pulse is determined by the time constants of the variable resistor VR1, the resistor R1, and the capacitor C2. The pulse generation time can be adjusted by adjusting the variable resistor Vr1.

When the monostable multivibrator M1 generates a predetermined time pulse, the transistor Q4 is turned on, and the second relay LY2 is driven by turning on the transistor Q4, and the signals of the second relay LY2 are one by one. It is output as a control signal of a feeding part of a driver for feeding a screw.

As described above, the automatic screw driver can always supply the screw automatically, the feeding time of the screw can be adjusted as needed by the user, and when the screw is excessively supplied, the pause can be performed. There is an advantage to fully automate the process of using the driver of impression and impression.

Claims (1)

In the automatic screw supply control circuit, the sensing unit 10 for detecting the movement state of the screw and the relay is driven by the output of the sensing unit 10 to generate a first signal for determining whether the screw feeding A second control signal triggered by the output of the first control signal generator 20 and the first control signal generator 20 to output a second signal of a pulse having a predetermined period for determining the screw feed hole Automatic supply control, characterized in that consisting of the generator 30 and the supply control unit 40 for switching the output of the second control signal generator 30 to output the screw feeding unit drive control signal of the driver Circuit.