JPS6312712B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a welding torch conveyor for automatically welding a welding line by traveling along the welding line while supporting the welding torch of a CO ₂ welding machine, etc. Regarding trolleys.

[Prior art]

FIG. 1 is a plan view showing a schematic configuration of a conventional truck of this type. 1 is a vehicle body, 2 is a running wheel, 3 is a welding torch, and 4 and 5 are copying rollers;
is supported by the vehicle body 1. 6 and 7 are flat plates to be welded, and the flat plate 7 is erected perpendicularly to the flat plate 6. 8 is a welding line between the flat plates 6 and 7.

Then, by running the vehicle body 1 while bringing the copying rollers 4 and 5 into contact with the flat plate 7, the weld line 8 is
The welding torch 3 can be moved along the welding line 8 to weld the welding line 8.

However, in this conventional truck, the copying roller 4,
The distance L between the rotation axes of the copying rollers 4 and 5 was set to be larger than the radius of the copying rollers 4 and 5. Therefore, the first
It is fine if the weld line 8 is straight as shown in the figure, but if there is a sharp bend in the weld line, the copying roller 4,
5 is separated from the material to be welded,
Since the distance between the welding torch 3 and the welding line cannot be maintained constant, there is a drawback that the bent portion cannot be welded.

[Purpose of the invention]

The present invention was made to solve the above-mentioned conventional drawbacks, and even when the weld line is sharply bent,
To provide a welding torch conveying cart capable of traveling along a bent part and welding the bent part while always keeping the distance between the welding torch and the welding line substantially constant.

[Summary of the invention]

2 to 4 illustrate the operating principle of the invention. In these figures, both 9 and 10 are copying rollers to which a magnetic force is applied, and their rotation axes are parallel to each other and are supported by a vehicle body (not shown). The distance L between the rotation axes of the copying rollers 9 and 10 is set to such a value that the copying rollers 9 and 10 partially overlap each other when viewed in a direction parallel to the rotation axes.

Therefore, when welding the square pipe 12 to the flat plate 11 as shown in FIGS. 2 and 3 (13 indicates the welding line), at the corner of the square pipe 12, follow the corner. Since the vehicle body changes direction while the intersection A between the rollers 9 and 10 is attracted, the welding torch and the welding line 13 also move at this corner.
The corner can be welded while keeping a substantially constant distance from the corner, and then the next straight part can be welded around the corner.

Further, based on this principle, according to the present invention, even in welding other than welding to square pipes as described above, it is possible to satisfactorily weld a weld line that is sharply bent.

According to the present invention, for example, as shown in FIG.
It is also possible to weld a circular weld line 16 between the round pipe 14 and the flat plate 15.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on embodiments shown in the drawings.

5 to 14 show an embodiment of the present invention. Three wheel supports 18 are supported at the lower part of the vehicle body 17 so as to be rotatable about rotational shafts extending perpendicularly to the running surface (flat plate 11 in the drawing). And these wheel support materials 1
8, a running wheel 20 is rotatably supported, respectively.

Further, two copying rollers 9 and 10 are supported on the vehicle body 17 so as to be rotatable about rotating shafts extending perpendicularly to the running surface. Here, both the copying rollers 9 and 10 are
As shown in FIG. 8, a layer 21 of permanent magnets;
Two iron alloy layers 22 provided on both sides of the permanent magnet layer 21, a ring 23 made of an aluminum alloy provided on the outer peripheral side of the permanent magnet layer 21, and a ring 23 made of an aluminum alloy and the permanent magnet layer 21 A gunmetal bushing 24 is provided at the center of the layer 22. Further, the distance L between the rotation axes of the copying rollers 9 and 10 (see FIG. 6) is such that the copying rollers 9 and 10 partially overlap each other when viewed in a direction parallel to the rotation axes. It is set.

A DC motor 25 is attached to the vehicle body 17, and a seventh motor is attached to the rotating shaft of the motor 25.
As clearly shown in the figure, a roller 26 made of a ferromagnetic material such as an iron alloy is fixed. The outer peripheral surface of this roller 26 is in contact with the outer peripheral surfaces of copying rollers 9 and 10, as clearly shown in FIGS. 6 and 7. The vehicle body 17 also includes a power supply box 1 for driving the motor 25.
9 is provided.

Further, the vehicle body 17 is provided with a torch support mechanism shown in detail in FIGS. 9 to 13 (an overall view of this torch support mechanism is shown in FIG. 9). Next, this torch support mechanism will be explained.

27 is a torch support board fixed to the vehicle body 17, and this board 27 is provided with a circular arc-shaped hole 28 as shown in FIG. 29 is a vertically movable support member, and a screw 30 fixed to this support member 29 is inserted into the arcuate hole 28 and is screwed into a wing nut 31 (see FIG. 10).

Further, as shown in FIGS. 10 and 12, a guide rod 32 extending in the vertical direction is fixed to the vertically movable table support member 29, and a vertical feed screw 33, which also extends in the vertical direction, is rotated. freely supported. The vertical feed screw 3
A bevel gear 34 is fixed to the upper end of 3, and this bevel gear 34 is meshed with a bevel gear 35. The bevel gear 35 is fixed to one end of a knob shaft 36 rotatably supported by the vehicle body 17, and a vertical adjustment knob 37 is fixed to the other end of the knob shaft 36.

38 is a vertically movable table, and this movable table 37
is movably fitted into the guide rod 32 and is screwed into the vertical feed screw 33. A horizontally movable base support member 39 is fixed to the vertically movable base 38, and this support member 39 includes the following:
A guide rod 40 extending in the left-right direction is fixed, and a left-right feed screw 41 also extending in the left-right direction is rotatably supported. The left-right feed screw 41 is also rotatably supported by the vehicle body 17, and has a left-right adjustment knob 42 fixed to one end thereof.

Reference numeral 43 denotes a horizontally moving table, and this moving table 43
is movably fitted to the guide rod 40 and is screwed to the left-right direction feed screw 41. In addition, a welding torch 4 is provided on this left-right moving table 43.
A torch mount 45 to which a torch 4 can be detachably attached is fixed.

Next, the operation of this embodiment will be explained.

In this embodiment, the vehicle body 17 is
The position and angle of welding torch 44 with respect to can be adjusted.

That is, by loosening the nut 31 (see Fig. 10), moving the screw 30 along the arcuate hole 28 (see Fig. 11), and retightening the wing nut 31 at the desired position, the welding torch can be attached to the running surface. 44
The angle θ (see FIGS. 7 and 11) can be adjusted.

Also, if you rotate the vertical adjustment knob 37,
This rotation is transmitted to the vertical feed screw 33 via the knob shaft 36, bevel gear 35, and bevel gear 34, so that the vertical movable table 38 moves in the vertical direction as indicated by arrow B in FIG. Therefore, by rotating the vertical adjustment knob 37 as described above, the vertical position of the torch 44 can be adjusted.

Further, when the left-right adjustment knob 42 is rotated, the left-right feed screw 41 is rotated integrally with the rotation, so that the left-right moving table 43 is moved in the left-right direction as indicated by arrow C in FIG. 13. Therefore, by rotating the left-right adjustment knob 42 as described above, the position of the torch 44 can also be adjusted in the left-right direction.

Regarding the position adjustment of the torch 44 in the left-right direction, as shown in FIG.
It is preferable to adjust so that the mutual intersection A and the center line of the welding torch 44 coincide with each other.

Now, after adjusting the position and angle of the welding torch 44 as described above, welding work is performed.Here, welding of the square pipe 12 to the flat plate 11 will be explained as an example.

In this case, the vehicle body 17 is placed on the flat plate 11 via the running wheels 20, and the copying rollers 9,
10 is brought into contact with the outer peripheral surface of the square pipe 12. When the motor 25 is driven in the direction of arrow D in this state, the rotation of the motor 25 is transmitted to the copying rollers 9 and 10 via the roller 26 (arrow E is the rotation direction of the copying roller 9, arrow F is the direction of copying). (respectively indicates the direction of rotation of the roller). At this time, since an attractive force due to magnetic force acts between the roller 26 and the copying rollers 9 and 10, slips are less likely to occur and the rotation of the motor 25 is reliably transmitted to the copying rollers 9 and 10. .

Further, when the copying rollers 9 and 10 are rotated as described above, the copying rollers 9 and 10 and the square pipe 1
2, the copying rollers 9 and 10 are attached to the seventh roller along with the vehicle body 17.
It moves along the outer peripheral surface of the square pipe 12, as shown by the arrow G in FIGS. 2 and 3. As already explained with reference to FIGS. 2 and 3, at the corner of the square pipe 12, the vehicle body 17 moves in the direction in which the intersection A of the rollers 9 and 10 adheres to the corner. Since the conversion is performed, the distance between the welding torch 44 and the weld can be kept substantially constant even at the corner.

Note that when the intersection A of the copying rollers 9 and 10 is attracted to the corner, the distance between the welding torch 44 and the welding line 13 becomes slightly shorter, but this shortening distance is not practical. There is no problem.

In the above embodiment, both the copying rollers 9 and 10 are driven by the motor 25, but it is also possible to drive only one of the copying rollers, or to drive both of the copying rollers 9 and 10. It is also possible to adopt a configuration in which the traveling wheels are driven instead of being driven.

Further, in the embodiment described above, only two copying rollers are provided, but for example, in the embodiment described above, a copying roller having the same diameter as the copying roller 9 and rotating around the same rotation axis as the copying roller 9 is separately provided. It goes without saying that one or more copying rollers may be provided, or one copying roller that has the same diameter as the copying roller 10 and rotates around the same rotation axis as the copying roller 10 may be provided.

Furthermore, in the embodiment, the copying rollers 9, 10
Although the distance L between the rotating axes is fixed, it goes without saying that the distance L between the rotating axes may be variable.

〔Effect of the invention〕

As described above, even when the welding line is sharply bent, the welding torch conveying truck according to the present invention always keeps the distance between the welding torch and the welding line almost constant, and travels along the bent part. This provides the excellent effect of being able to weld parts.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a schematic configuration of a conventional welding torch carrier, FIGS. 2 to 4 are plan views showing the operating principle of a welding torch carrier according to the present invention, and FIG. 5 is a welding torch according to the present invention. FIG. 6 is a plan view showing the embodiment; FIG. 7 is a sectional view taken along the - line in FIG. 6; FIG. 8 is a copying roller in the embodiment. 9 is a perspective view showing the welding torch support mechanism in the embodiment, FIG. 10 is a partial sectional view showing the welding torch support mechanism, and FIG. 11 is a cross section taken along line XI-XI in FIG. 10. 12 is a sectional view taken along the line XII-XII in FIG. 10, FIG. 13 is a sectional view taken along the line - in FIG. FIG. 9, 10... Copying roller, 17... Car body, 20
...Traveling wheel, 44...Welding torch.

Claims (1)

[Claims] 1 It has a car body that supports a welding torch, and two copying rollers that are rotatably supported by this car body and are applied with a magnetic force, and the rotational axes of the two copying rollers are parallel to each other. and 2 above.
The distance between the rotational axes of the two copying rollers is set to a size such that the two copying rollers partially overlap each other when viewed in a direction parallel to the rotational axis. Torch carrier.