JP2901363B2 - Column head welding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column head welding method for a steel frame structure for a unit housing.

[0002]

2. Description of the Related Art In a steel structure for a unit housing,
As described in Japanese Patent Laid-Open No. 2-22176, a floor-side steel cover and a ceiling-side steel cover are welded to both ends of a square steel pipe column constituting a living room unit.

The above-mentioned lid not only helps to secure the rigidity of the steel pipe column, but also has a floor-side lid provided with an engaging hole for a positioning pin provided in the ceiling-side lid of the lower story column to be abutted.
The ceiling side lid is provided with a nut to which a lifting pin for lifting the unit is screwed or a positioning pin which can be inserted into an insertion hole provided in the floor side lid of the upper pillar is screwed.

However, in the prior art, as shown in FIG.
The lid 2 is set on the end of the pillar 1 with the lower surface of the pillar 1 supported on a horizontal floor, and the two sides of the lid 2 are welded sideways. During the welding, the lid 2 is kept held without shifting to the end face of the column 1.

[0005]

However, the prior art has the following problems.

Since the lower surface of the column is supported on the horizontal floor surface and the lid is made to conform to the end surface of the column, positioning of the column and the lid is difficult to set.

[0007] Since the two sides of the lid are welded sideways, it is difficult to improve the welding speed and welding accuracy.

It is necessary to perform welding while holding the lid on the end face of the column without shifting, and welding workability is poor.

SUMMARY OF THE INVENTION It is an object of the present invention to facilitate positioning of a steel plate cover to an end of a square steel tube column and to improve welding speed and welding accuracy.

Another object of the present invention is to improve welding workability.

[0011]

According to a first aspect of the present invention, there is provided a column cover welding method for welding a steel plate cover to an end of a square steel pipe column, the method comprising: With the lower two surfaces of the pillar supported, the pillar is positioned and set, a lid is set at the end of the pillar, and the upper two sides of the lid are welded to the end of the pillar, and the upper part of the pillar is welded. After turning the lower surface, two new upper sides of the lid are welded to the ends of the pillar.

According to a second aspect of the present invention, in the first aspect of the present invention, after the lid is set at an end of the column, the lid is temporarily welded to an end of the column. It was made.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the column is further supplied by a column handling robot, and the lid is set by a lid supply robot. It is designed to be welded by a welding robot.

[0014]

According to the present invention, the following effects are obtained.

The lower two surfaces of the column intersect each other with the welding jig
It is supported on two inclined support surfaces, and the posture of the column and the lid is stabilized at a single set position, so that the positioning and setting thereof can be facilitated.

Since the upper two sides of the lid are welded, downward welding is performed, and the welding speed and welding accuracy can be improved.

By temporarily welding the lid to the end of the pillar,
The welding workability can be improved. When the lid supply robot is used, the lid supply robot can be retracted after the tack welding, and the operation rate of the lid supply robot can be improved.

By robotizing the supply of the column, the setting of the lid, and the welding, the entire operation can be smoothly linked, and the speed and accuracy can be increased.

[0019]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
FIG. 3 is a flowchart showing a column cover welding procedure, FIG. 3 is a sectional view of a main part showing a column joint of a unit house, FIG. 4 is a front view showing a welding jig, and FIG.

The column lid welding device 10 is for welding a steel plate lid 2A on the floor side and a steel plate lid 2B on the ceiling side to both ends of the square steel tube column 1, respectively.

The pillar 1 constitutes a steel frame structure for a unit house. As shown in FIG. 3, a floor girder 5 is joined to a lower end of the pillar 1 and a ceiling girder 6 is attached to an upper end of the pillar 1. Joined.
The lids 2A and 2B serve to secure the rigidity of the column 1,
For the floor side lid 2A, the engagement hole 8 of the positioning pin 7 provided in the ceiling side lid 2B of the lower floor pillar 1 to be abutted.
A lifting pin (not shown) for lifting the unit is screwed into the ceiling-side lid 2B, or a positioning pin into which the engagement hole 8 provided in the floor-side lid 2A of the upper floor pillar can be engaged. 7 is provided with a nut 9 to be screwed.

As shown in FIG. 1, the column lid welding apparatus 10 includes a column handling robot 11 capable of freely supplying the column 1, and a welding robot 12, a lid supply robot 13, and a welding robot 12 arranged around the column handling robot 11. And a bead finishing robot 14. The welding robot 12
Has an arc welding torch, and the bead finishing robot 14 has a grinder.

In the column cap welding apparatus 10, two welding jigs 15A and 15B on the floor side and the ceiling side are arranged around the column handling robot 11. At this time, one end of the floor-side welding jig 15A faces and the ceiling-side welding jig 15B
The welding robot 12 and the lid supply robot 13 are arranged at a position facing one end of the robot. Then, the column handling robot 11 (a) posts the column 1 on the material stock trolley 16
Is set on the ceiling-side welding jig 15B, and (b) the column 1 set on the ceiling-side welding jig 15B is inverted and set on the floor-side welding jig 15A.

In the column cap welding apparatus 10, two finishing jigs 17A and 17B on the floor side and the ceiling side are arranged around the column handling robot 11. At this time, one end of the floor-side finishing jig 17A faces and the ceiling-side finishing jig 17B
The bead finishing robot 14 is disposed at a position facing one end of the robot. And the pillar handling robot 11
(a) The pillar 1 on the floor side welding jig 15A is placed on the floor side finishing jig 17A.
And (b) the column 1 set on the floor-side finishing jig 17A is turned over, set on the ceiling-side finishing jig 17B, and (c) the column 1 on the ceiling-side finishing jig 17B. Is transferred to the discharge conveyor 18 side.

Here, the welding jigs 15A and 15B and the finishing jigs 17A and 17B position and clamp the column 1 in the longitudinal direction at each welding position or each finishing position. The welding jigs 15A and 15B and the finishing jigs 17A and 17A,
Since the structure of 7B is basically the same, welding jig 15
The structures of A and 15B will be described as representatives. That is, as shown in FIG. 4, the welding jigs 15A and 15B are provided with two inclined support rollers 21 and 21 intersecting each other so as to be able to support the lower two surfaces of the column 1, and are opened and closed by a solenoid 22. There is provided a pair of clamp claws 23, 23 which press the two upper surfaces of the column 1 and clamp the column 1 between the column 1 and the inclined support rollers 21, 21.

A procedure for welding a column cap by the column cap welding apparatus 10 will be described below (see FIG. 2). In FIG. 2,
HR represents a column handling robot, AR represents a welding robot 12, PR represents a lid supply robot 13, and GR represents a bead finishing robot 14.

(1) The pillar handling robot 11 sets the pillar 1 on the stock truck 16 in the ceiling-side welding jig 15B.

(2) The ceiling-side lid 2B in the lid chute 24 is set at the ceiling-side end of the pillar 1 by the lid supply robot 13.

(3) The following (a) to
By (c), the ceiling lid 2B is welded to the ceiling end of the pillar 1.

(A) By the welding robot 12, the ceiling lid 2B
5 is temporarily welded to both ends of the pillar 1 at the end of the pillar 1 (FIG. 5).
(A)).

(B) The lid supply robot 13 is moved backward.

(C) The ceiling lid 2 is moved by the welding robot 12.
The upper two sides of B are welded to the end of the pillar 1 (see FIG. 5B).

(4) The pillar handling robot 11
The column 1 is turned around its own axis on the ceiling-side welding jig 15B.

(5) Welding side lid 2 by welding robot 12
Weld two new upper sides of B to the end of pillar 1 (Fig. 5
(C)).

(6) With the pillar handling robot 11,
The column 1 on the ceiling side welding jig 15B is inverted and set on the floor side welding jig 15A.

(7) The floor-side lid 2A in the lid chute 24 is set at the floor-side end of the pillar 1 by the lid supply robot 13.

(8) The above-mentioned (3)
As in (a) to (c), the floor lid 2A is welded to the floor end of the column 1.

(9) By the pillar handling robot 11,
The column 1 is turned around its own axis on the floor-side welding jig 15A.

(10) The floor lid 2A is moved by the welding robot 12.
Weld the two upper sides of to the end of pillar 1.

(11) By the pillar handling robot 11,
The column 1 on the floor-side welding jig 15A is transferred to the floor-side finishing jig 17A.

(12) The pillar 1 is
Finish the bead around the floor side lid weld.

(13) By the pillar handling robot 11,
The column 1 on the floor-side finishing jig 17A is turned over and set on the ceiling-side finishing jig 17B.

(14) The pillar 1 is
Finish the bead around the ceiling side lid weld.

(15) By the pillar handling robot 11,
The pillar 1 on the ceiling-side finishing jig 17B is transferred to the discharge conveyor 18 side.

Next, the operation of the above embodiment will be described.

The lower two surfaces of the column 1 are fixed to the welding jigs 15A and 15A.
5B is supported by two inclined support rollers 21 and 21 that intersect each other. The posture of the column 1 and the lids 2A and 2B is stabilized at a single set position, and the positioning and setting thereof can be facilitated.

Since the upper two sides of the lids 2A and 2B are welded, downward welding is performed, and the welding speed and welding accuracy can be improved.

By temporarily attaching the lids 2A and 2B to the end of the column 1, welding workability can be improved. When the lid supply robot 13 is used, after the tack welding, the lid supply robot 1 is used.
3 can be retracted, and the operation rate of the lid supply robot 13 can be improved.

By robotizing the supply of the column 1, the setting of the lids 2A and 2B, and the welding, the entire operation can be smoothly linked, and the speed and accuracy can be increased.

[0050]

As described above, according to the present invention, when welding a steel plate lid to the end of a square steel pipe column, positioning of the column and the lid can be facilitated, and the welding speed and welding accuracy can be improved. it can.

Further, according to the present invention, welding workability can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a column cover welding procedure.

FIG. 3 is a sectional view of a main part showing a column joint of a unit house.

FIG. 4 is a front view showing a welding jig.

FIG. 5 is a process diagram showing a column cap welding process.

FIG. 6 is a schematic diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pillar 2A, 2B Lid 10 Pillar lid welding device 11 Pillar handling robot 12 Welding robot 13 Lid supply robot 15A, 15B Welding jig 21 Tilt support roller

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ identification symbol FI E04B 1/348 E04B 1/348 H // B23K 101: 28 (58) Field surveyed (Int.Cl. ⁶ , DB name) B23K 9/00 B23K 9/12 B23K 37/04 B23K 37/047 E04B 1/348

Claims (3)

(57) [Claims] In a method for welding a steel plate lid to an end of a square steel pipe column, a method of welding a column lid with two lower inclined support surfaces of a welding jig supporting the lower two surfaces of the column is provided. Positioning and setting, set the lid on the end of the pillar, the upper side of the lid
A column cover welding method, comprising welding two sides to the end of the column, turning the upper and lower surfaces of the column, and then welding two new upper sides of the cover to the end of the column. 2. After setting the lid on the end of the pillar,
2. The method according to claim 1, wherein the lid is temporarily welded to an end of the column. 3. The method according to claim 1, wherein the column is supplied by a column handling robot, the lid is set by a lid supply robot, and the lid is welded by a welding robot.