JP4529155B2 - Remote control device for engine-driven welding machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a welding current generating circuit and a control signal generating circuit for controlling the welding current, and a control signal adjusting means for controlling the welding current is connected to the control signal generating circuit via an AC power supply extension cord to perform welding. The present invention relates to a remote control device for an engine-driven welding machine in which current is remotely controlled.
[0002]
[Prior art]
The engine-driven welding machine is provided with a control signal adjusting means for controlling a welding current according to a workpiece to be welded, that is, a workpiece.
Also, the engine-driven welding machine and the welding work site are often separated from each other. In this case, the control signal for adjusting the control signal of the control signal generation circuit that controls the welding current can be easily controlled by the welding operator. A remote control signal conditioner with adjusting means is required, and this remote control signal conditioner is connected to the engine-driven welder via a dedicated cable for transmitting the control signal to the control signal generating circuit. .
[0003]
[Problems to be solved by the invention]
However, when such a dedicated cable is used, a spare dedicated cable with a dedicated connector (connector) that can be extended in the middle according to the distance between the engine-driven welding machine and the welding operator at the welding work site is also available. In addition, the dedicated cable itself was very expensive. Also, carrying a long dedicated cable is very cumbersome and lacks portability. In addition, when a long dedicated cable is left in a spiral or bent many times, this dedicated cable often breaks, but it cannot be immediately replaced with a replacement dedicated cable for the dedicated cable. The welding work was interrupted, and the work period of the welding work was delayed.
In order to solve such a problem, an object of the present invention is to provide a remote control device for an engine-driven welder that can use a normal AC power extension cord without using a dedicated cable. It is what.
[0004]
[Means for Solving the Problems]
In order to achieve the object, the invention according to claim 1 includes a welding current generating circuit 1 and a control signal generating circuit 2 for controlling the welding current, and an AC power outlet 2a connected to the control signal generating circuit 2 is provided. An AC power plug 3a connected to an AC power outlet 2a connected to the control signal generating circuit 2 provided in the engine driven welder (A) at one end; An AC power supply extension cord (B) having an AC power supply outlet 3b at one end, an AC power supply plug 4a connected to an AC power supply outlet 3b at the other end of the AC power supply extension cord (B), and the AC power supply And a control signal adjuster (C) provided with control signal adjusting means connected to a control signal generating circuit 2 provided in the engine-driven welding machine (A) via an extension cord (B). It is obtained by a remote control device for an engine driven welding machine according to.
Since it did in this way, since a special cable becomes unnecessary and a normal AC power supply extension cable can be used, even if it disconnects, since it is cheap, it can be immediately replaced with the alternative AC power supply extension cable.
[0005]
The invention according to claim 2, the welding current generator, and an AC power generator, a control signal for controlling the welding current superimposed on the AC component from the AC power generator and with said AC component separated and a control signal generating circuit for generating the control signal taken out Te, the control signal generating circuit and the AC power generator and the connecting the engine driven welding machine which includes an AC power outlet and (a), one end wherein comprising a plug for AC power supply connected to the control signal generating circuit provided in the engine driven welding machine to the AC power outlet that is connected to an AC power generator, power extension with outlet for AC power at the other end to The engine drive welding machine includes a cord (B), an AC power plug connected to an AC power outlet at the other end of the AC power extension cord, and an AC power extension cord The remote control device for an engine-driven welding machine is characterized by comprising a control signal adjuster (C) provided with a control signal adjusting means connected to a control signal generating circuit.
Thus, the AC power plug 3a provided at one end of the AC power extension cord (B) is connected to the control signal generation circuit 2 and the AC power generator 1 'provided in the engine drive welding machine (A). An AC power plug 4a provided in the control signal adjuster (C) is connected to an AC power outlet 3b provided at the other end of the AC power extension cord (B). The control signal of the welding current can be adjusted by adjusting the control signal adjusting means provided in the signal adjuster (C).
In addition, it is possible to connect an electric power tool operated by an AC power source to the AC power outlet 3b provided at the other end of the AC power extension cord (B) and operate it.
[0006]
As described above, since the normal AC power supply extension cord (B) is used, the AC power supply extension cord (B) can be easily extended along the welding work site, and the AC power supply extension can be extended. The cord (B) is inexpensive and can be immediately replaced with a replacement AC power extension cord (B) even if it is disconnected. In the case of a long AC power extension cord (B), this AC power extension cord Is wound around the reel 3c so that it is easy to carry and is not excessively bent, so there is no risk of disconnection.
[0007]
According to a third aspect of the present invention , there is provided an engine-driven welding machine (A) having a welding current generating circuit, a control signal generating circuit for controlling the welding current, and an AC power outlet connected to the control signal generating circuit. An AC power extension cord having an AC power plug connected to an AC power outlet connected to a control signal generation circuit provided in the engine-driven welding machine,
The AC power supply extension cord is a remote control device for an engine-driven welding machine, characterized by comprising control signal adjusting means connected to a control signal generating circuit provided in the engine-driven welding machine to adjust a control signal. Is.
The invention according to claim 4 separates the AC component from a welding current generation circuit, an AC power generator, a control signal for controlling a welding current superimposed on an AC component from the AC power generator. An engine-driven welding machine (A) including an AC power outlet connected to the control signal generation circuit and the AC power generator;
An AC power supply extension cord having an AC power supply plug connected to an AC power supply outlet connected to a control signal generating circuit provided in the engine-driven welding machine,
The AC power supply extension cord includes a control signal adjusting means for adjusting a control signal connected to a control signal generating circuit provided in the engine-driven welding machine. Therefore, the invention according to claim 3 and claim 4 does not bother to connect the control signal regulator (C) to the AC power outlet 3b provided at the other end of the AC power extension cord (B). It will be better.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a remote control device for an engine-driven welding machine according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a diagram showing a first embodiment of the present invention, that is, an embodiment of the invention according to claim 1. This invention includes a welding current generating circuit 1, a control signal generating circuit 2 for controlling the welding current, and An engine-driven welding machine (A) provided with a normal AC power outlet 2a connected to the control signal generating circuit 2, and a control signal generating circuit 2 provided in the engine-driven welding machine (A) at one end. An AC power supply extension cord (B) having a normal AC power supply plug 3a connected to the connected AC power supply outlet 2a and having a normal AC power supply outlet 3b at the other end, and this AC power supply extension cord (B The control signal generating circuit 2 provided in the engine-driven welding machine (A) is connected to a normal AC power plug 4a connected to an AC power outlet 3b at the other end of the above and an AC power extension cord (B). Connection Is obtained by a remote control device of the control signal with a control signal adjusting means conditioner (C) and engine driven welding machine, characterized by comprising by that.
[0009]
The welding current generating circuit 1 includes a three-phase alternating current generator 1a driven by an engine, a rectifier circuit 1b combining a diode and a thyristor for rectifying the alternating current generated by the three-phase alternating current generator 1a, and the control A single-chip microcomputer 1f having an A / D conversion circuit 1c, an output port 1d, and an input port 1e, to which a control signal from the signal generation circuit 2 is input, an output of the input port 1e and the three-phase AC generator 1a The zero point detection circuit 1g connected between the two terminals and the photothyristor coupler 1h connected between the output port 1d and the gate of the thyristor to adjust the flow angle of the current flowing through the thyristor. . The base material 5 is connected to the + output terminal of the welding current generating circuit 1, and the welding rod 6 is connected to the − output terminal.
[0010]
The control signal generating circuit 2 has a resistor Ra connected to + 5V of the control power supply 7 connected to one input end of the A / D conversion circuit 1c and one end of the normal AC power supply outlet 2a. The other end of the outlet 2 a is connected to the ground E electrode of the control power source 7. A resistor Rb, a resistor Rc, and a variable resistor VRa are connected in series between +5 V of the control power supply 7 and the ground E, and a connection point between the resistor Rb and the resistor Rc is the other side of the A / D conversion circuit 1c. It is connected to the input end.
[0011]
The AC power supply extension cord (B) may be a normal AC power supply extension cord as shown in FIG. (A). Also, as shown in (b), the AC power supply extension cord is wound around a reel 3c. But you can. In this case, an AC power outlet 3b is provided on the reel 3c.
[0012]
A control signal adjuster (C) having a control signal adjusting means connected to a control signal generating circuit 2 provided in the engine-driven welding machine (A) via the AC power supply extension cord (B) is variable with the resistor Rd. A neon lamp NL is connected in parallel to a series circuit with the resistor VRb, and a normal AC power plug 4a is connected to the connection point.
[0013]
Next, the operation of the first embodiment will be described. The AC power supply extension cord (B) is connected to the AC power supply extension cord (B) connected to the control signal generation circuit 2 provided in the engine drive welding machine (A), and the AC power supply extension cord (B) is connected to the AC power supply outlet. When the AC power plug 4a of the control signal adjuster (C) is connected to 3b, the voltage Va between one input terminal of the A / D conversion circuit 1c and the ground E becomes less than 5V.
[0014]
Next, when the variable resistor VRb, which is a control signal adjusting means of the control signal adjuster (C), is adjusted, the voltage Va is changed from 5 × (Rd / (Ra + Rd)) V to 5 × (Rd + VRb / ( Ra + Rd + VRb)) until V. The welding current is adjusted and controlled by adjusting the variable resistor VRb. The resistor Rd is an overcurrent limiting resistor for preventing the variable resistor VRb from being damaged by an overcurrent when the AC power plug 4a of the control signal adjuster (C) is mistakenly connected to AC100V. Further, the neon lamp NL is turned on when AC 100 V is applied.
[0015]
When the voltage Va is 5V, that is, when the control signal adjuster (C) is not connected, the single-chip microcomputer 1f has a variable resistor VRa of the control signal generating circuit 2 provided in the engine drive welding machine A. The welding current can be controlled in accordance with the voltage Vb that changes by adjusting the current. The single-chip microcomputer 1f receives a signal for changing the timing (time from zero cross) of turning on the thyristor of the rectifier circuit 1b from the output port 1d through the photothyristor coupler 1h depending on the magnitude of the voltages Va and Vb. Applied to the gate of the thyristor. By changing the timing at which this thyristor is turned on, the welding output voltage changes, and finally the welding current changes.
Note that it is possible to simplify the control of the single-chip microcomputer 1f by setting the resistors Ra = Rb and Rd = Rc.
[0016]
FIG. 2 is a diagram showing a second embodiment of the present invention, that is, an embodiment of the invention according to claim 2, in which the welding current generating circuit 1, the AC power generator 1 'and the welding current are controlled. And a control signal generating circuit 2 for generating a control signal to be separated from the frequency of the AC power source, and a normal AC power outlet 2a connected to the control signal generating circuit 2 and the AC power generator 1 '. A normal engine power welder (A) and an AC power outlet 2a connected to an AC power generator 1 'connected to the control signal generator circuit 2 and the AC power generator 1' provided at the engine drive welder (A) at one end. A power supply extension cord (B) having an AC power supply plug 3a and a normal AC power supply outlet 3b at the other end, and an AC power supply outlet 3b at the other end of the AC power supply extension cord (B) are connected. Normal AC power supply By means of a plug 4a and a control signal adjuster (C) provided with control signal adjusting means connected to a control signal generating circuit 2 provided in the engine drive welding machine (A) via an AC power supply extension cord (B) This is a remote control device for an engine-driven welding machine.
[0017]
The welding current generating circuit 1 in this embodiment is different from the first embodiment in that it includes a three-phase AC generator 1a driven by an engine and a single-phase generator, that is, an AC power generator 1 ′. Is different.
[0018]
The control signal generation circuit 2 is configured as follows. That is, a remote control signal to which a control signal for controlling a welding current is serially transmitted from a control signal adjuster (C) described later is applied to a normal AC power outlet 2a, and the AC power generator 1 ' AC100V from is also applied. A control signal applied to the AC power outlet 2a and a first pulse transformer circuit 2b to which AC 100V is applied via a capacitor C, and 50 Hz and 60 Hz superimposed on the control signal obtained from the pulse transformer circuit 2b. A waveform shaping circuit is formed for the high-pass filter 2c for removing the AC component, the low-pass filter 2d for removing high-frequency noise, the amplifier 2e, and the comparator 2f. The control signal shaped by the waveform shaping circuit is switched by a switch 2i via a clock synchronous serial reception circuit 2g that converts a serial signal into a parallel signal and a volume value D / A conversion circuit 2h that converts a digital signal into an analog signal. The circuit is formed so as to be applied to the fixed contact a side. A variable resistor VRa is connected between the fixed contact b side of the switch 2i and the ground E, and a resistor Re is connected between the fixed contact b side of the switch 2i and + 5V.
[0019]
The AC power extension cord (B) is almost the same as that of the first embodiment, but the second embodiment is provided with two or more ordinary AC power outlets 3b. .
[0020]
The control signal adjuster (C) is formed as follows. That is, the resistor Rf connected to + 5V and the second variable resistor VRb as the control signal adjusting means convert the analog signal that is the control signal adjusted by the variable resistor VRb into a digital signal. The volume value A / D conversion circuit 4b is connected to a clock synchronous serial transmission circuit 4c that converts a parallel signal into a serial signal. The clock synchronous serial transmission circuit 4c is connected to the AC 100V power line. Connected to the second pulse transformer circuit 4d for superimposing the serial signal, the pulse transformer circuit 4d is connected to a normal AC power plug 4a, and further applied to the AC power plug 4a to each circuit. AC / DC converter 4e to obtain a direct current power supply is connected to form the control signal regulator (C) It has been.
[0021]
Next, the operation of the second embodiment will be described. First, when performing remote control of welding current, the movable contact of the switch 2i provided in the engine drive welding machine (A) is switched to the fixed contact a side. Next, an analog signal which is a control signal obtained by adjusting the variable resistor VRb of the control signal adjuster (C) is converted into a digital signal by the volume value A / D conversion circuit 4b, and this is converted into a clock synchronous serial signal. The data is input to the transmission circuit 4c. In the clock synchronous serial transmission circuit 4c, the parallel signal from the volume value A / D conversion circuit 4b is converted into a serial signal and input to the pulse transformer circuit 4d. The pulse transformer circuit 4d superimposes the converted serial signal on an AC 100V power source.
[0022]
A serial signal, which is a control signal superimposed on the AC 100V power supply, is transmitted to the control signal generation circuit 2 provided in the engine-driven welding machine (A) via the AC power extension cord (B). This serial signal is subjected to 50 V and 60 Hz AC components removed by a high-pass filter 2c forming a waveform shaping circuit, and after high-frequency noise is removed by a low-pass filter 2d, the waveform is shaped through an amplifier 2e and a comparator 2f to 0V. Or it becomes a serial signal of 5V. The control signal is converted into a parallel signal by inputting the waveform-shaped serial signal to the clock synchronous serial reception circuit 2g. The digital signal that has become the parallel signal is converted into an analog signal by the volume value D / A conversion circuit 2h, and is further input to the single-chip microcomputer 1f via the switch 2i.
[0023]
When the welding current is not remotely controlled, the switch 2i is switched to the side of the fixed contact b to adjust the variable resistor VRa which is a control signal adjusting means.
[0024]
FIG. 3 is a view showing a third embodiment of the present invention, that is, an embodiment of the invention according to claim 3. As shown in FIG. 3 (a), the power supply extension cord (B ) Has a normal AC power plug 3a connected to an AC power outlet 2a connected to the control signal generating circuit 2 provided in the engine-driven welding machine (A) at one end, and a normal AC power source at the other end. 3. A power outlet 3b and control signal adjusting means 3d for adjusting a control signal connected to a control signal generating circuit 2 provided in the engine-driven welding machine (A). This is a remote control device for the engine-driven welding machine described in 2. FIG. 3B shows an embodiment in which the power extension cord is wound around the reel 3c. In this case, the control signal adjusting means 3d is provided on the reel 3c.
By doing so, it is not necessary to bother to connect the control signal adjuster to the AC power outlet provided at the other end of the AC power extension cord.
[0025]
【The invention's effect】
As described above, since the invention according to claim 1 is configured as described above, a dedicated cable is not necessary, and a normal AC power supply extension cable can be used. An alternative AC power extension cable can be immediately replaced.
Further, the control of the welding current can be remotely controlled by simply connecting the control signal adjuster having the control signal adjusting means to the control signal generating circuit provided in the engine-driven welding machine via a normal AC power supply extension cable. Work efficiency is improved.
[0026]
Further, since the invention according to claim 2 is configured as described above, the AC power plug provided at one end of the AC power extension cord is connected to the control signal generation circuit provided in the engine drive welding machine and the AC power generator. Connected to a connected AC power outlet, and connected to an AC power outlet provided at the other end of the AC power extension cord, an AC power plug provided in the control signal adjuster is connected to the control signal adjuster. The control signal of the welding current can be adjusted by adjusting the signal adjusting means. In addition, it is possible to connect an electric power tool operated by an AC power source to an AC power outlet provided at the other end of the AC power extension cord and operate it.
[0027]
In addition, since the invention according to claim 3 and claim 4 is configured as described above, the control signal conditioner need not be connected to an AC power outlet provided at the other end of the AC power extension cord. Also gets better.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment of the present invention.
FIG. 2 is a diagram showing a second embodiment of the present invention.
FIG. 3 is a diagram showing a third embodiment of the present invention.
[Explanation of symbols]
A Engine-driven welding machine B AC power extension cord C Control signal regulator 1 Welding current generator circuit 1 'AC power generator 1a Three-phase AC generator 1b Rectifier circuit 1c A / D converter circuit 1d Output port 1e Input port 1f Single chip Microcomputer 1g Zero point detection circuit 1h Photothyristor coupler 2 Control signal generation circuit 2a AC power outlet 2b Pulse transformer circuit 2c High pass filter 2d Low pass filter 2e Amplifier 2f Comparator 2g Clock synchronous serial reception circuit 2h Volume value D / A conversion circuit 2i switch 3a AC power plug 3b AC power outlet 3c reel 3d control signal adjusting means 4a AC power plug 4b volume value A / D conversion circuit 4c clock synchronous serial transmission circuit 4d pulse transformer circuit 4e AC / DC converter 5 mother 6 welding rod

Claims (4)

An engine-driven welding machine (A) including a welding current generation circuit and a control signal generation circuit for controlling the welding current, and an AC power outlet connected to the control signal generation circuit;
An AC power supply extension cord (B) having an AC power supply plug connected to an AC power supply outlet connected to a control signal generating circuit provided in the engine-driven welding machine at one end and an AC power supply outlet at the other end; ,
AC power plug connected to an AC power outlet at the other end of the AC power extension cord, and control signal adjusting means connected to a control signal generating circuit provided in the engine-driven welding machine via the AC power extension cord A control signal conditioner (C) comprising:
A remote control device for an engine-driven welding machine, characterized by comprising: Generating a welding current generator, and an AC power generator, the control signal taken out by separating the control signal and a said AC component to control the superimposed welding current to the AC component from the AC power generator An engine-driven welding machine (A) including an AC power outlet connected to the control signal generation circuit and the AC power generator;
Comprising a plug for AC power supply connected to an AC power outlet that is connected to the control signal generating circuit provided in the engine drive welder at one end and the AC power generator, with a outlet for AC power to the other power supply Extension cord (B),
AC power plug connected to an AC power outlet at the other end of the AC power extension cord, and control signal adjusting means connected to a control signal generating circuit provided in the engine-driven welding machine via the AC power extension cord And a control signal adjuster (C) provided with a remote control device for an engine-driven welding machine. An engine-driven welding machine (A) having a welding current generating circuit, a control signal generating circuit for controlling the welding current, and an AC power outlet connected to the control signal generating circuit;
An AC power extension cord having an AC power plug connected to an AC power outlet connected to a control signal generation circuit provided in the engine-driven welding machine,
The remote control apparatus for an engine-driven welding machine, wherein the AC power supply extension cord includes control signal adjusting means for adjusting a control signal connected to a control signal generating circuit provided in the engine-driven welding machine.   A control for generating a welding current generation circuit, an AC power generator, a control signal for controlling a welding current superimposed on an AC component from the AC power generator and the AC component by separating the control signal and generating the control signal An engine-driven welding machine (A) including a signal generation circuit, and an AC power outlet connected to the control signal generation circuit and the AC power generator;
  An AC power extension cord having an AC power plug connected to an AC power outlet connected to a control signal generation circuit provided in the engine-driven welding machine,
  The remote control apparatus for an engine-driven welding machine, wherein the AC power supply extension cord includes control signal adjusting means connected to a control signal generating circuit provided in the engine-driven welding machine to adjust a control signal.

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