JPS6142681Y2 - - Google Patents

Description

[Detailed Description of the Invention] In the present invention, the gas that has passed through the solenoid valve in the power supply device is sent to the torch together with the welding rod fed out from the welding rod feeding device, while the operating lever provided on the torch The present invention relates to a welding machine that opens and closes the electromagnetic valve by operating the solenoid valve to supply and stop gas.

In this type of welding machine, a limit switch that is turned off and on in conjunction with an operating lever is generally built into the torch. Therefore, an electric wire cable is run parallel to the gas rubber pipe from the limit switch to the power supply device housing the solenoid valve.

By the way, since the welding rod feeding device and the power supply device are fixed, there is little damage to the power cable between them, but the electric wire cable between the welding rod feeding device and the torch is damaged due to changes in the welding location. Since it is constantly moved as the worker moves, it has the disadvantage that it is susceptible to damage quickly, and especially the electric wire cable near the torch can break in a short period of time due to bending fatigue. In reality, this breakage occurs on average once every two to three months when the welding machine is used continuously, which is a significantly shorter lifespan than that of a gas rubber tube, which is about 12 months. Therefore, it is desired to extend the life of the power cable, but due to the size of the torch, it is not possible to make the cable too thick, and there is a limit to how long the life can be extended.

In this regard, the present invention is capable of supplying and stopping gas with the same operational feeling as the conventional means in which a limit switch is built into the torch, but at least the distance between the torch and the welding rod feeding device is To provide a welding machine which can be used continuously for a long period of time without wire breakage and which can eliminate the need for electric wires and cables.

This will be explained below based on the drawings. In Figure 1, 1
Reference numeral 2 represents a gas cylinder for supplying gas, and 2 represents a power supply device incorporating a solenoid valve 3. A battery B for driving the solenoid valve 3 and other required mechanisms is connected to an external terminal. 4 houses a drum around which the welding rod 5 is wound, and by rotating the drum, the welding rod 5 is
The welding rod feeding device 6 is a pistol-shaped torch, and a trigger-like operating lever 7 is provided. 8 is a gas rubber pipe for feeding gas from the gas cylinder 1 to the electromagnetic valve 3, and 9 is a gas rubber pipe for feeding gas from the electromagnetic valve 3 to the torch 6 through the welding rod feeding device 4. The welding rod 5 is supplied to the torch 6 along with the gas rubber tube 9. still,
The length of the gas rubber tube 9 between the power supply device 2 and the welding rod feeder 4 is about 2 m, and the length of the gas rubber tube 9 between the welding rod feeder 4 and the torch 6 is about 2.5 m.

Reference numeral 10 denotes an electric switch provided in the welding rod feeding device 4, which as shown in FIG. It consists of a spring 13 that biases the rotation in the direction in which it does not move. This electric switch 10 and the operating lever 7 of the torch 6 are connected by a wire cable 14 as shown in the figure, and by pulling and operating the operating lever 7, the arm rod 12 is rotated and the limit switch 11 is switched on. It is designed to do so. Further, this electric switch 10 and the solenoid valve 3 constitute an electrical closed circuit together with a battery B via an electric wire cable 15, and the limit switch 1
The solenoid valve 3 is controlled to open and close in conjunction with the on/off operation (switching operation) of the valve 1. In the figure, 16 is a vinyl tube that covers the wire cable 14, and one end is in contact with the torch 6 and the other end is in contact with the case of the welding rod feeder 4. 17 is an extension spring.

According to this configuration, by operating the operating lever 7, the electric switch 10 is switched, and the solenoid valve 3 is controlled to open and close. Therefore, the gas supply and stop operations can be performed with the same operating feeling as in the conventional means in which a limit switch is built into the torch 6. However, unlike the conventional means, no electric cable is used between the welding rod feeder 4 and the torch 6, and the wire cable 14 is used instead. The wire cable 14 is originally flexible and has a structure that is not easily fatigued by bending, so it does not break in a short time like an electric cable, and can be used for a longer period than the life of the normal gas rubber tube 9. Therefore, by using the wire hose, it is sufficient to replace the gas rubber tube 9 about once a year, and the frequency of replacement is significantly reduced, thereby increasing the efficiency of the welding work. In the above embodiment, the electric switch 10 is provided in the welding rod feeder 4, but it can also be provided in the power supply unit 2.

Since the welding machine according to the present invention is configured as described above, it is possible to carry out welding work while supplying and stopping gas with the same operational feeling as conventional means, while also having a welding rod feeding device. By not using a power cable between the torches, the frequency of wire breakage can be drastically reduced, and it is therefore expected that welding work will become more efficient.

[Brief explanation of the drawing]

FIG. 1 is an overall piping configuration diagram of a welding machine showing an embodiment of the present invention, and FIG. 2 is a diagram showing the main parts of FIG. 1 in detail. 2...Power supply device, 3...Solenoid valve, 4...Welding rod feeding device, 5...Welding rod, 6...Torch, 7...
Operation lever, 10... electric switch, 14... wire cable.

Claims (1)

[Scope of utility model registration request] The gas passing through the solenoid valve in the power supply device is sent to the torch along with the welding rod fed out from the welding rod feeding device, and the solenoid valve is opened and closed by operating an operating lever provided on the torch. In a welding machine that is configured to supply and stop gas by using a welding machine, an electric switch is provided in the welding rod feeding device or the power supply device, and the electric switch and the operating lever are connected by a wire cable, so that the operating lever is The electric switch is configured to switch when operated, and the electric switch and the solenoid valve are electrically connected to control the opening and closing of the solenoid valve in conjunction with the switching operation of the electric switch. Welding machine.