JPH1147983A - Device for welding narrow part of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach a reinforcement by welding to a narrow part inside a structure. SOLUTION: The device is constituted of a welding torch 3 for welding a reinforcement 1b to be attached to a structure 1, a holder 5 for holding the welding torch 3, a welding truck 6 on which a base end of the holder is fixed, a cover rail unit 7 to which a travelling rail 7a and a rack rail are attached for the purpose of moving the welding truck 6, a support 9 for fixing the cover rail unit 7, a base unit 8 to which the base of the support 9 is fitted, and a magnet 10 arranged at both ends of the base unit 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for welding a narrow portion of a structure such as a box-shaped bridge girder or a building column.

[0002]

2. Description of the Related Art In a structure used for practical use as a bridge or a building, a reinforcing material is added to the inside of the structure in order to improve seismic resistance or to increase the strength of the structure by reforming. There are cases.

Conventionally, in the case described above, a working opening is formed in a side plate of a structure, and an operator enters the structure through the opening to perform welding work of a reinforcing material to be added, and the welding operation is completed. Then, the opening is closed with a closing plate, and the operation is completed.

[0004]

However, in the above-mentioned prior art, when an opening through which a worker can enter and exit is formed in the structure, the strength of the structure is reduced. Therefore, means for changing the load of the structure itself is required, and there is a problem that high cost is required for installation of the gantry and the like.

[0005] Further, the cutting time for drilling the opening or the welding work time for closing the opening requires an operation time longer than the time required for mounting the reinforcing member when the diameter of the opening is large, resulting in an increase in cost. There is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple structure welding apparatus for a narrow part of a structure without reinforcing reinforcement of load change of the structure and without having to drill a large opening through which an operator enters and exits. And

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a welding torch for welding a reinforcing material added to a structure, a holder for holding the welding torch, and a welding bogie having a base end of the holder fixed. A cover rail on which a traveling rail and a rack for moving the welding carriage are mounted, a support having one end fixed to the cover rail and having a mounting portion at the other end, and engaging with the mounting portion of the support The problem is solved by a device for welding a narrow portion of a structure comprising a positioning base to be formed and magnets disposed at both ends of the base.

According to the above-mentioned means, the apparatus for welding a narrow portion of a structure according to the present invention firstly arranges a cover rail having a running rail and a rack in the vicinity of a reinforcing material which is a material to be welded. Are arranged on the running rail and the rack. After that, the holder and the welding torch are arranged. Next, the base is disposed, the other end of the support having one end integrated with the cover rail is attached to the base, and both ends of the base are fixed and positioned with a magnet.

In the apparatus for welding a narrow part of a structure according to the present invention, each part is separately inserted from a small handhole in the above-described process, and is internally assembled.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for welding a narrow portion of a structure according to the present invention.

FIG. 1 is a perspective view showing an entire apparatus for welding a narrow portion of a structure according to the present invention. Reference numeral 1 denotes a box-shaped bridge girder or a structure such as a building column, and 2 denotes a small handhole having a diameter of about 160 mm formed in a side plate 1a of the structure 1.
b is a reinforcing material welded on the bottom plate 1c of the structure 1.

Reference numeral 3 denotes a welding torch for welding the reinforcing member 1b of the structure 1 and the bottom plate 1c, and reference numeral 4 denotes a cable for feeding a welding wire, a shielding gas, and the like to the welding torch 3.

Reference numeral 5 denotes a holder for the welding torch 3, reference numeral 6 denotes a welding carriage, and the holder 5 fixes a base to the welding carriage 6.

Reference numeral 7 denotes a cover rail body containing a traveling rail and a rack, and a cover for preventing spatter from a welded portion from adhering to the welding carriage 6, the traveling rail and the rack.

The welding carriage 6 travels using the traveling rail and rack of the cover rail 7 as guides and driving means.

Reference numeral 8 denotes a positioning base, and one end of supports 9 and 9 is fixed to the cover rail 7.
The other ends of the supports 9 are attached to the base 8.

Reference numerals 10 and 10 denote magnets for fixing both ends of the base body 8, and a magnetic force is attached and detached by turning on and off a switch.

FIG. 2 is a plan view of an apparatus for welding a narrow portion of a structure according to the present invention, wherein 1a is a side plate, 1b is a reinforcing material,
The welding torch 3 is directed to the corner of the reinforcing member 1b to perform fillet welding.

The welding trolley 6 has a motor 6a and is driven by energization from a power cable 6b. A traveling rail 7a is disposed on the cover rail 7, and the welding carriage 6 travels.

The cover rail 7 has one end of each of the supports 9 fixed thereto, and the other end of the support 9 is configured to be attached to and detached from the base 8 by screws 9a, 9a. ing.

FIG. 3 is a view taken in the direction of arrows AA in FIG. 2. The cover rail 7 is provided with a rack 7b in addition to the traveling rail 7a, and the rack 7b is provided with a drive shaft from the motor 6a of the welding cart 6. The provided pinions 6b mesh with each other, and the welding cart 6 travels.

A rack 7b may be formed integrally with the traveling rail 7a. The holder 5 is composed of a support portion 5a erected on the welding carriage 6, a slide portion 5b extending horizontally from the support portion 5a, and a torch grip portion 5c suspended from the slide portion 5b.

FIG. 4 is a view taken in the direction of arrows BB in FIG. 2, showing a state in which a traveling rail 7a and a rack 7b are attached to a cover rail 7 and a support 9 having one end fixed to a base 8. Is shown.

FIG. 5 is a view taken in the direction of arrows CC in FIG. 3. The welding carriage 6 travels left and right along the traveling rails 7a and the racks 7b.

The present invention is configured as described above.
If a small video camera is installed in the factory, the welding status can be monitored. In addition, various types of welding such as CO ₂ and MIG welding can be performed.

[0026]

As described above, the present invention is as described above. Since the welding device is assembled with small parts, it is only necessary to make a small-diameter handhole in the structure, so that the structure does not have a decrease in strength. Therefore, there is no need to provide a special base for changing the load.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire apparatus for welding a narrow part of a structure according to the present invention.

FIG. 2 is a plan view of an apparatus for welding a narrow portion of a structure according to the present invention.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a view taken in the direction of arrows BB in FIG. 2;

FIG. 5 is a view taken in the direction of arrows CC in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Structure 1a Structure side plate 1b Structure reinforcement 1c Structure bottom plate 2 Small handhole 3 Welding torch 4 Cable 5 Holder 5a Column 5b Sliding part 5c Torch gripping part 6 Welding truck 6a Motor 6b Power cable 7 Cover Rail 7a Running rail 7b Rack 8 Base 9 Support 10 Magnet

Claims (1)

[Claims] 1. A welding torch for welding a reinforcing material added to a structure, a holder for holding the welding torch, a welding bogie having a base end of the holder fixed, and a moving bogie for moving the welding bogie. A cover rail on which a traveling rail and a rack are mounted, a support having one end fixed to the cover rail and having a mounting portion at the other end, a positioning base engaged with the mounting portion of the support, and the base And a magnet disposed at both ends of a narrow portion of the structure.