JP2001212670A - Simplified automatic welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve performance in a simplified automatic welding machine by always grounding four wheels, maintaining tractive force and contriving stability of traveling. SOLUTION: An axle of either front wheels or rear wheels is supported rotatabely by making the center of widthwise direction of a carriage body a rotating shaft and the wheels are mounted so as to be movable vertically. The axle is supported on a bracket, and the bracket is pivotally attached to the carriage body rotatably so as to make the wheels move vertically by the rotation of the bracket. Further, this machine is mounted on the carriage body, and equipped with a spring interposed between the bracket so as to always energize torque from the carriage body to the bracket.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple automatic welding machine, and more particularly to an improvement in a support structure for running wheels.

[0002]

2. Description of the Related Art Conventionally, a simple automatic welding machine (hereinafter referred to as an automatic welding machine) in which a torch holder is mounted on a trolley that travels along a welding line, and a welding torch is gripped and welded to the torch holder. Are used at shipbuilding sites and the like.
The automatic welding machine has a guide copying roller that projects laterally from the main body, and also has four wheels, usually a front wheel and a rear wheel, and is guided by the copying roller and self-propelled along a welding line. It is designed to run.

[0003] In this automatic welding machine, since four wheels are mounted so as to be on the same plane, if the running surface is deformed such as a concave surface or a convex surface, the four wheels are simultaneously grounded on the running surface. Instead, one wheel rises from the running surface,
There was a tendency for traction to drop and for the running direction to become unstable.

[0004]

SUMMARY OF THE INVENTION According to the present invention, four wheels are always brought into contact with the running surface to maintain traction,
It aims to improve the performance of an automatic welding machine by stabilizing the running performance.

[0005]

SUMMARY OF THE INVENTION In an automatic welding machine, either the front wheel or the rear wheel axle is rotatably supported on a bogie main body with a center in the width direction of the bogie main body as a rotation axis, and the wheels are moved up and down. It was attached as possible. Further, the axle was supported by a bracket, and the bracket was rotatably mounted on the bogie main body. Further, a spring is mounted on the bogie main body, and is interposed between the bracket and the bogie.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an automatic welding machine according to the present invention, and FIG. 2 is a front view taken along line AA of FIG. FIG. 3 is a front view showing another example. First, an outline of an automatic welding machine to which the present invention is applied will be described, and then the configuration of the present invention will be described.

In FIG. 1, reference numeral 1 denotes a bogie main body (hereinafter referred to as a main body) of an automatic welding machine; 2 a slider slidably mounted in the width direction of the main body 1; The torch holder 4 is a welding torch held by the torch holder 3. The welding torch 4 is set in an appropriate welding direction by sliding the slider 2 in the width direction and adjusting the angle of the torch holder 3.

[0008] Reference numeral 5 and 6 denote guide copying rollers which are attached to the front and rear portions of the side surface of the main body 1 so as to protrude laterally, and the main body 1 is run by slightly shortening the protruding length of the front roller 5. Sometimes it follows the guide surface. Reference numeral 7 denotes a rear wheel mounted on the main body 1 and driven by a driving device 8, and 9 denotes a front wheel mounted on the main body 1. A sprocket is mounted on the axle of the front wheel 9 and the rear wheel 7, and a chain is wound between the two sprockets, whereby the front wheel 9 is driven from the rear wheel side.

The main body 1 runs by driving a rear wheel 7 and a front wheel 9 by a driving device 8, but is guided by the rolling of the guide copying rollers 5, 6 to the guide surface, and travels along the guide surface. I do. In this way, the welding line is welded by the welding torch 4 while the main body 1 travels.

The axle 10 of the illustrated front wheel 9 is supported by a bracket 11 and is rotatably mounted on a center shaft 12 provided at the center of the main body 1 in the width direction. Therefore, the axle 10 of the front wheel 9 is rotatable around the center in the width direction of the main body 1 as a rotation axis, and the front wheel 9 can be moved up and down by the rotation of the axle 10.

With such a configuration, when the running surface has a concave surface or a convex surface, the front wheel 9 moves up and down along the deformed surface, and the four wheels are always in contact with the running surface. FIG.
FIG. 13 is a front view showing another example of the automatic welding machine according to the present invention, wherein reference numeral 13 denotes a spring mounted on the main body 1 and interposed between the main body 1 and the bracket 11,
1 is pressed to constantly apply rotational force to the bracket 11.

[0012] By urging the rotational force with the spring in this way, it is possible to more reliably obtain the ground contact state of the four wheels. In the automatic welding machine in which the driving device 8 is connected to the front wheel side, the rear wheel may be supported so as to be vertically movable.

Although not shown, a magnet is built in the main body 1 and the main body 1 is held by the attraction force of the magnet.
In some cases, the machine is run vertically and welded vertically.
The present invention can also be implemented in this vertical welding. In a posture such as a vertical position, a greater traction force is required because the own weight of the welding machine is downward, so that the present invention in which the four wheels are grounded is more effective in a posture such as a vertical position.

[0014]

According to the present invention, in an automatic welding machine, the axle of the front wheel is rotatably supported around the center of the bogie body in the width direction as a rotation axis, and the front wheel is mounted so as to be vertically movable. Correspondingly, the front wheels moved up and down, and four wheels came into contact at all times. For this reason, the traction force could be maintained, the running performance could be stabilized, and the performance of the automatic welding machine could be improved.

Further, a spring is interposed between the main body and the bracket, and the bracket is pressed from the main body so that the rotational force is always urged by the spring, so that the four wheels can be surely grounded. be able to.

[Brief description of the drawings]

FIG. 1 is a plan view of an automatic welding machine according to the present invention.

FIG. 2 is a front view taken along the line AA of FIG. 1;

FIG. 3 is a front view showing another example of the automatic welding machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Slider 3 Torch holder 4 Welding torch 5, 6 Guide copying roller 7 Rear wheel 8 Drive device 9 Front wheel 10 Front wheel axle 11 Bracket 12 Center shaft 13 Spring

Claims (3)

[Claims] An axle of one of a front wheel and a rear wheel is rotatably supported on a bogie main body around a center in a width direction of the bogie main body, and wheels are mounted to be vertically movable. Automatic welding machine. 2. The simple automatic welding machine according to claim 1, wherein the axle is supported by a bracket, and the bracket is rotatably mounted on the bogie main body. 3. The simple automatic welding machine according to claim 2, wherein a spring is mounted on the bogie main body and interposed between the bogie and the bracket.