JPH0871746A - Automatic welding equipment - Google Patents

Abstract

PURPOSE: To provide an automatic welding equipment to tentatively erect the handrail structure transported to construction site and to execute welding. CONSTITUTION: The equipment is composed of a running device 20, in which a handrail is made to track, a detecting means 22b to detect a position of a support tube 11 to be welded, a hanging carrier 30 to travel on an arm 23 of running device and a welding torch driving device 40 hanged to a hanging rod 32b of hanging carrier. By use of the constitution, the running device 20 detects the position of support tube 11 to stop, the hanging carrier 30 decides the position of welding joint part 12 and automatic welding is executed by the welding driving device 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic welding apparatus for a handrail structure, and in particular, a handrail structure in which a plurality of support pipes are welded and fixed to a pipe-shaped handrail at regular intervals in a direction perpendicular to the handrail. The present invention relates to an automatic welding device for welding and fixing a joint portion at the lower end of a support pipe to a steel floor material in a state.

[0002]

2. Description of the Related Art Conventionally, a handrail structure is carried into a site by welding and fixing a plurality of support pipes to a pipe-shaped handrail at regular intervals in a right angle direction at a factory. Next, this handrail structure is temporarily erected on the floor so that the handrails are parallel to each other, and then the welding and fixing of the joint portion 12 is started. The welding of the joint portion 12 is performed by forming a molten pool formed by melting the welding rod. Because of the manual welding while watching, the worker was equipped with a safety belt and leaned over the upper body through the gap between the handrail and the handrail, which was dangerous work and was inefficient. Further, in the automatic tie-up welding apparatus for fillet welding, there is a drawback that the apparatus must be attached and detached for each column tube. A guide such as a temporary rail is required to improve this drawback and perform continuous automatic welding, and there is a drawback that a great deal of cost and labor are required to manufacture and establish this guide.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide an automatic welding apparatus for a handrail structure capable of automatic welding without the need for a guide such as a temporary rail.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a traveling device capable of traveling with a handrail as an orbit, and a detection means for detecting the position of a support pipe to be welded provided on the traveling device. An arm extending in the horizontal direction from the traveling device, a suspension carriage having means for moving on the arm, and a suspending rod having a retractable suspension rod suspended under the arm, and a suspension rod of the suspension truck. It is composed of a welding torch driving device suspended from the above.

Further, the welding torch drive device has a support base which has a groove on one side which engages with the suspension rod and which allows passage of a support pipe on the other side, and which has a ring-shaped guide.
The torch carriage has a plurality of wheels that travel in a circle following the guide ring, and a welding torch mounted on the torch carriage.

Further, the supporting base of the welding torch driving device has a built-in three-way claw chuck mechanism for centering.

[0007]

According to the present invention, the traveling device 20 detects the position of the column pipe 11 to be welded and stops by using the handrail of the main installation as a track without the need for a guide such as a temporary rail. Three
0 moves horizontally and vertically in conjunction with the traveling device 20,
The welding torch drive device 40 suspended from the suspension carriage 30 via the suspension rod 32 is moved to the position of the joint portion 12 at the lower end of the support pipe 11 to perform automatic welding.

Further, by following a ring-shaped guide 42 formed on a support base 41 of the welding torch drive device 40, a torch carriage 46 having a plurality of wheels travels in a circle. A welding torch 50 mounted on the torch carriage 46 automatically welds the entire circumference of the joint portion 12 at the lower end of the support pipe.

Further, the support base 41 of the welding torch drive device 40 is such that the three-way claw chuck 45 built in the lower side performs centering and determines the optimum position for welding.

[0010]

EXAMPLES Next, the present invention will be described more specifically based on examples.

1 and 2 are an overall perspective view and a sectional view showing an embodiment of the present invention. As shown in FIG. 1, a handrail structure is carried into a field by welding a plurality of support pipes 11 to a pipe-shaped handrail 10 at a constant interval in a right angle direction at a factory. Next, this handrail structure is temporarily erected on the floor surface 13 so that the handrails are parallel to each other, and the joint portion 12 is temporarily fixed by means such as spot welding.

The traveling device 20 has a built-in control circuit equipped with a microcomputer, and is mounted so that the rollers 21a and 21b sandwich the handrail 10 so that the handrail 10 can be used as a track for traveling. The roller 21b is pressed against the handrail 10 by a spring. Roller 2
1a is rotated by the power of a motor (not shown) and moves the handrail 10. The position of the support pipe 11 is detected by using the position detection sensors 22a and 22b so that the traveling device 20 can be stopped accurately. This sensor uses optical measuring means using laser light. As another means, there is a measuring means using ultrasonic waves or the like, or a mechanical measuring means using a touch sensor.

The suspension carriage 30 is arranged on an arm 23 extending in the horizontal direction of the traveling device 20, and rotates wheels 31 by the power of a motor (not shown). Further, the suspension carriage 30 is connected to the traveling device by a circuit, and the suspension carriage 30 is in the position A when the traveling device 20 travels, and when the traveling device 20 detects the position of the support pipe 11 and stops, the suspension carriage 30. Reference numeral 30 is configured to stop at the start B position by a limit switch. An upper suspension rod 32a is suspended under the suspension carriage 30. The lower suspension rod 32b is inserted therein and has a mechanism for hydraulically sliding in the vertical direction. The hydraulic system is equipped with a limit switch, and when the support base 41 of the welding torch drive device 40 connected to the lower suspension rod 32b touches the floor surface, the lower suspension rod 32b stops descending. Has become.

As shown in FIGS. 3 and 4, the welding torch driving device 40 includes a support base 41, a torch carriage 46, and a welding torch 5.
It is formed by 0. One side of the support base 41 is suspended by the lower suspension rod 32b of the suspension carriage 30, and the other side is the support pipe 11
A groove 44 that can pass through is formed. This support 41
The centering is set so that the three-way claw chuck 45 built in the lower portion of the support base 41 tightens the support pipe 11 so that the center of the support base and the center of the support pipe 11 become the same. Then, the fixing to the floor surface 13 is performed by a suction pad 43 using a vacuum pad or a magnet. Further, a guide ring 42 for guiding the torch carriage 46 is formed on the upper portion of the support base 41.

The torch carriage 46 has at least three wheels 47.
The guide ring 42 formed on the upper portion of the support base 41 travels in a circle. This is 1
When one wheel passes through the groove 44, the other two wheels are on the guide 42, so that the wheel can be transferred to the guide 42 beyond the groove 44 without being disengaged from the guide. The torch carriage 46 is configured to travel with the welding torch 50 mounted.

With the above structure, the welding operation is performed as follows. Handrail 10 for traveling device 20 of automatic welding device
Mount it on the top and secure it with rollers 21a and 21b. At this time, it is confirmed that the position of the suspension carriage 30 is at the position A where the welding torch drive device 40 does not interfere with the support pipe 11. Next, by rotating the drive motor of the traveling device 20, the roller 21a rotates and moves on the handrail 10. When the position of the support pipe 11 is reached, the sensors 22a and 22b detect the position of the support pipe 11. Then stop.

The suspension carriage 30 is set to the position A when the traveling device 20 travels, and the traveling device is operated by the prop tube 11.
When the position is detected and stopped, the interlocking circuit with the traveling device operates to start, move to position B, and stop by the limit switch. At this time, the welding torch drive device 40 is also suspended by the lower suspension rod and simultaneously moved. Hanging cart 3
When 0 is in the position A, the upper end of the lower suspension rod 32b is set in the position C, and when it is moved to the position B, it is moved to the position D by hydraulic operation, and the welding torch drive device 40 is operated. When the support base 41 touches the floor surface (steel material) 13, the hydraulic system switch is turned off and the movement of the lower rod 32b to the lower surface is stopped. This position B is a position where the center of the welding torch drive device 40 and the center of the strut tube 11 substantially coincide with each other.

When the position of the lower rod 32b is determined by the above process, the welding torch driving device 4 connected to the lower rod 32b is determined.
The approximate position of 0 is also determined. Then, the three-way claw chuck 45 built in the lower portion of the support base 41 performs centering while tightening the support pipe 11. In this case the hanging rod 32
Since the a and 32b and the support base 41 are rigid bodies, when the three-way claw chuck 45 tightens the support pipe 11, the suspension pipe 30 moves the support pipe 11 in the right angle direction, and the parallel movement with the handrail 10. Is performed by the traveling device 20. After the centering is completed, the support base 41 of the welding torch drive device 40 is fixed by the suction tool 43 using a magnetic or vacuum suction pad, and then the three-way claw chuck 45 is opened. The reason for opening is that welding cannot be performed because the welding torch 50 cannot access the joint portion 12 when the three-way claw chuck 45 clamps the support pipe 11.

A welding torch mounted on the torch carriage 46.
The wire supply to the chuck 50 is activated and welding is performed. The wire uses a flux cored wire for self-shielding. The welding torch 50 travels so that the torch carriage draws a circle following the guide ring 42, and the welding torch 50 also follows the same to fillet weld the joint portion (welding portion) 12. When the welding is completed, the suction force of the suction tool 43 is released. Next, the suspension truck 30 returns from the position B to the position A, moves toward the next support pipe, and the traveling device is started.

FIGS. 5 and 6 are modifications of the present invention. Figure 5
Also, as shown in FIG. 6, the welding torch drive device 40 and the welding torch 50 are used in reverse. In this case, the three-way claw chuck is fixed to the column tube 11.

[0021]

As described above, according to the present embodiment, the traveling device 20 detects the position of the column pipe 11 to be welded by using the handrail of the main installation as a track without the need for a guide such as a temporary rail. Then, the suspension carriage 30 moves horizontally and vertically in conjunction with the traveling device 20, and the welding torch drive device 40 is suspended from the suspension carriage 30 via the suspension rod 32.
Can be moved to the position of the joint portion 12 at the lower end of the pillar pipe 11 to perform automatic welding.

Further, by following a ring-shaped guide 42 formed on a support base 41 of the welding torch drive device 40, a torch carriage 46 having a plurality of wheels travels in a circle. The welding torch 50 mounted on the torch carriage 46 can automatically weld the entire circumference of the joint portion 12 at the lower end of the support pipe.

Further, the support base 41 of the welding torch drive device 40 can be centered by the three-way claw chuck 45 built in the lower side, and the optimum position for welding can be determined.

[0024]

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is an overall sectional view showing an embodiment of the present invention.

FIG. 3 is a plan view of essential parts showing a welding torch and a driving device of the present invention.

FIG. 4 is a cross-sectional view of essential parts showing a welding torch and a driving device of the present invention.

FIG. 5 is a perspective view showing a modified example of the present invention.

FIG. 6 is a sectional view showing a modified example of the present invention.

[Explanation of symbols]

 10 ... Handrail 11 ... Support pipe 12 ... Joint part 13 ... Floor surface 20 ... Traveling device 21 ... Roller 22 ... Sensor 30 ... Suspended cart 32 ...・ Hanging rod 40 ・ ・ ・ Welding torch driving device 41 ・ ・ ・ Supporting base 42 ・ ・ ・ Guide ring 45 ・ ・ ・ Three-way claw chuck 46 ・ ・ ・ Torch carriage 47 ・ ・ ・ Wheels 50 ・ ・ ・ Welding Torch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location E04F 11/18

Claims (3)

[Claims] 1. A handrail structure having a pipe-shaped handrail and a plurality of support pipes welded and fixed to the handrail at regular intervals in a direction perpendicular to the handrail is temporarily installed so that the handrail is parallel to the floor surface. In the state, an automatic welding device for a handrail structure for welding and fixing the joint portion at the lower end of the support pipe to the steel floor material, the traveling device being capable of traveling with the handrail as a track, and provided in this traveling device. And a hanging rod which is provided with a detecting means for detecting the position of the support pipe to be welded, an arm extending in the horizontal direction from the traveling device, and a means for moving on the arm and which is extendable and retractable at the lower part thereof. An automatic welding device for a handrail structure, comprising: a suspension carriage for suspending a suspension carriage; and a welding torch drive device suspended on a suspension rod of the suspension carriage. 2. The welding torch drive device includes a support base having one side engaged with the suspension rod and another side provided with a groove through which a support pipe can pass, and a ring-shaped guide, and a guide ring. And a torch carriage having a plurality of wheels that travel in a circle following the above, and a welding torch mounted on the torch carriage.
The automatic welding device for a handrail structure according to claim 1, wherein the automatic welding device comprises: 3. The automatic welding apparatus for a handrail structure according to claim 1, wherein a support base of the welding torch drive unit has a built-in three-way claw chuck mechanism for centering.