JPH11343673A - Beam connecting structure and roof unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength by butt-welding the end part of each beam to both sides of an intermediate plate protruded out of the end of a beam interposed between the end parts of a pair of beams. SOLUTION: An intermediate plate 23 protruded vertically from the profiles of the end parts of a first roof beam 21 and a second roof beam 22 is interposed between the end parts of the roof beams 21, 22. The end parts of the beams 21, 22 are butt-welded to both sides of the plate 23 from the circumferential parts of the butt parts to the plate 32. At this time, a backing 24 is provided on the reverse side of the respective butt welding parts of the beam 21, 22 end parts on both sides of the plate 32 through a degassing clearance, and the crossing angles of the beams 21, 22 butted to the intermediate plate 23 are set equal to each other. Accordingly, since the respective welding padding of the first and second roof beam end parts with the intermediate plate are isolated by the intermediate plate, the welding quality can be improved without their mutual influence, and the connecting strength and rigidity of the weld part can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a beam joint structure and a roof unit.

[0002]

2. Description of the Related Art Conventionally, as a beam joining structure in which an end of a first beam and an end of a second beam are butted in their longitudinal direction and welded, as described in Japanese Patent Application Laid-Open No. 10-46678. Providing an intermediate plate between the end of the first beam and the end of the second beam, the end surface of the flange portion of the first beam, the end surface of the flange portion of the second beam, and the upper end surface of the intermediate plate. There is a method in which a recess for embedding a welding material is formed by the above method, and the first and second beams and the intermediate plate are joined by a welding material filling the recess.

[0003]

However, in the prior art, the welding state is such that the end faces of the flange portions of the first and second beams are fillet-welded to both sides of the upper end face of the intermediate plate.
It is difficult to ensure high bonding strength and rigidity.

[0004] It is an object of the present invention to ensure high welding strength and rigidity at the joint between the first and second beams.

Another object of the present invention is to ensure high joint strength and rigidity at a beam joint of a roof unit.

[0006]

According to the first aspect of the present invention, there is provided a beam joint formed by welding an end of a first beam and an end of a second beam in a longitudinal direction thereof. In the structure, an intermediate plate is provided between the end of the first beam and the end of the second beam, the intermediate plate projecting outward from the contour of the end, and the first plate is provided on both sides of the intermediate plate. The end of the beam and the end of the second beam are butt-welded.

According to a second aspect of the present invention, in the first aspect of the present invention, further, on both surfaces of the intermediate plate,
A backing is provided on each back side of the butt weld at the end of the first beam and the butt weld at the end of the second beam via a gas release gap. .

According to a third aspect of the present invention, in the first or second aspect of the present invention, each of the first beam and the second beam crosses and abuts an intermediate plate. The corners are made equal to each other.

The present invention described in claim 4 provides the present invention according to claims 1 to 3.
A roof unit in which roof beams are joined to each other by the beam joining structure according to any one of the above.

[0010]

According to the first aspect of the present invention, the following operations are provided. When the ends of the first and second beams are butt-welded to both surfaces of the intermediate plate, the outer edges of the intermediate plate are first and second.
Projecting outward from the contour of the end of the beam. Thereby, welding when the end of the first beam is butt-welded to one surface of the intermediate plate, and welding when the end of the second beam is butt-welded to the other surface of the intermediate plate. The piles are separated by an intermediate plate and do not affect each other. That is, the weld build-up when the end of the first beam is butt-welded to one surface of the intermediate plate is applied to the weld at the end of the second beam which is subsequently welded to the other surface of the intermediate plate. There is no adverse effect. Therefore, the welding quality of the joint between the first and second beams can be improved, and high joining strength and rigidity can be secured at this joint.

According to the second aspect of the present invention, the following operations are provided. A backing was provided on both sides of the intermediate plate, behind the butt weld at the end of the first beam and the butt weld at the end of the second beam, with a gas vent gap therebetween. Therefore, it is possible to prevent dripping when the first and second beams are welded to the intermediate plate.

According to the third aspect of the present invention, the following operations are provided. The intersection angles at which the first beam and the second beam intersect and abut on the intermediate plate are equal to each other. Therefore,
The stress acting on the joint between the first and second beams is the first and second beams.
Transmitted to the beam in a balanced manner,
Deformation can be prevented.

According to the present invention, the following operation is provided. The above can be realized at the joint of the roof beams of the roof unit.

[0014]

FIG. 1 is a schematic view showing a roof unit according to a first embodiment, FIG. 2 is a schematic view showing a roof beam and an intermediate plate, FIG. 3 is a schematic view showing a butt weld of a roof beam, FIG. 4 is a schematic diagram showing a butt welding jig for a roof beam, FIG. 5 is a schematic diagram showing a roof unit of a second embodiment, FIG. 6 is a schematic diagram showing a butt welding portion of a roof beam, and FIG. It is a schematic diagram which shows the butt welding part of the roof beam of 3rd Embodiment.

(First Embodiment) (FIGS. 1 to 4) FIG. 1A shows a roof 10 composed of a plurality of roof units 11A, 11B,.
1 shows one roof unit 11A. The roof unit 11A is a joined body of a plurality of roof beams. For example, the end of the first sloped roof beam 21 and the end of the second sloped roof beam 22 are butted in their longitudinal directions. It is made by welding.

As shown in FIGS. 2 and 3, the first roof beam 21 and the second roof beam 22 are provided between the ends thereof with an intermediate plate 23 projecting upward and downward from the contour of the ends. The end of the first roof beam 21 and the end of the second roof beam 22 are butt-welded to both surfaces of the intermediate plate 23 from the outer peripheral portion of the butt portion to the intermediate plate 23. Things. After butt welding, the first roof beam 2
The projecting length a of the intermediate plate 23 projecting vertically and outward from the end of the first roof beam 22 and the end of the second roof beam 22 is approximately up and down respectively.
It is preferably 5 mm (FIG. 2B). And, on both sides of the intermediate plate 23, a butt weld at the end of the first roof beam 21 and a back side of the butt weld at the end of the second roof beam 22, with the gas vent gap b interposed therebetween. Thus, a backing 24 is provided. Preferably, the degassing interval b is about 2 mm (FIG. 2B).

The first roof beam 21 and the second roof beam 22
Are set such that the intersection angles θ1 and θ2 (FIG. 2B) crossing and abutting on the intermediate plate 23 are equal to each other.

However, the first roof beam 21 and the second roof beam 22
Is welded as follows using the welding jig base 30 shown in FIG. (1) First support portion 31 and second support portion 32 of welding jig base 30
Hold the first roof beam 21 and the second roof beam 22 respectively. At this time, the intermediate plate 23 is arranged between the first roof beam 21 and the second roof beam 22.

(2) In the above (1), each of the first roof beam 21 and the second roof beam 22 and the intermediate plate 23 are connected to the first roof beam 21 and the second roof beam 21 so that the welding can sufficiently penetrate to the back side. (2) The roof beams 22 are arranged and fixed with an appropriate route gap corresponding to the base material thickness of the roof beams 22.

(3) The first roof beam 21 and the second roof beam 22 are butt-welded along the outer periphery of the butt portion to the intermediate plate 23.

Therefore, according to the present embodiment, the following operations are provided. When the ends of the first and second roof beams 21 and 22 are butt-welded to both surfaces of the intermediate plate 23, the intermediate plate 2
3 has an outer edge projecting outward from the contours of the ends of the first and second roof beams 21 and 22. Thereby, the first roof beam 2
The weld height when the end of the first roof beam 22 is butt-welded to one surface of the intermediate plate 23 and the weld height when the end of the second roof beam 22 is butt-welded to the other surface of the intermediate plate 23. They are separated by the intermediate plate 23 and do not affect each other. That is, the end of the first roof beam 21 is
Of the second roof beam 2 which is welded to the other surface of the intermediate plate 23 when the butt welding is performed on one surface of the second roof plate 2
There is no adverse effect on the weld at the end of No. 2. Therefore, the welding quality at the joint between the first and second roof beams 21 and 22 can be improved, and high joint strength and rigidity can be secured at this joint.

On both sides of the intermediate plate 23, the back side of the butt weld at the end of the first roof beam 21 and the butt weld at the end of the second roof beam 22, respectively, A backing 24 was provided. Therefore, it is possible to prevent dripping when the first and second roof beams 21 and 22 are welded to the intermediate plate 23.

Each of the first roof beam 21 and the second roof beam 22 intersects and abuts on the intermediate plate 23 at the same intersection angle. Therefore, the first and second roof beams 2
The stress acting on the joints 1 and 22 is transmitted to the first and second roof beams 21 and 22 in a well-balanced manner, thereby preventing the joints from being broken or deformed.

The above items (1) to (3) can be realized at the joint of the roof beams 21 and 22 of the roof unit 10.

(Second Embodiment) (FIGS. 5 and 6) In the second embodiment, one roof unit 41A of a plurality of roof units 41A, 41B,.
, The end of the inclined first roof beam 51 and the end of the horizontal second roof beam 52 are butt-welded in their longitudinal direction.

The first roof beam 51 and the second roof beam 52 are also
As in the embodiment, an intermediate plate 53 projecting outward from the contour of the end is interposed between the ends, and the first roof beam 51 is provided on both sides of the intermediate plate 53.
And the end of the second roof beam 52 are butt-welded to the intermediate plate 53 from the outer periphery of the butt. And, on both sides of the intermediate plate 53, a butt weld at the end of the first roof beam 51 and a butt weld at the end of the second roof beam 52, respectively,
A backing 54 is provided through the gas vent gap.

A first roof beam 51 and a second roof beam 52
Is the intersection angle θ crossing and butting with the intermediate plate 53
1, θ2 (FIG. 6B) are set equal to each other.

However, the first roof beam 51 and the second roof beam 52
Is welded using a welding jig base in the same manner as in the first embodiment. Therefore, also in the second embodiment, the first
The operation is substantially the same as that of the embodiment.

(Third Embodiment) (FIG. 7) The third embodiment is substantially different from the first embodiment in that:
The intermediate plate 23 is provided with the ridge beam fixing portion 23A. That is, the intermediate plate 23 (53 is the same) is not only provided for butt welding of the first roof beam 21 and the second roof beam 22 but also has a function of a joint plate with the ridge beam.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is also included in the present invention. For example, in the embodiment of the present invention, the beam joining structure of the present invention is not limited to the one used for the constituent beams of the roof unit, and may be used for the constituent beams of the building unit.

[0031]

As described above, according to the present invention, high welding strength and rigidity can be ensured at the joint between the first and second beams.

Further, according to the present invention, high joining strength and rigidity can be secured at the beam joining portion of the roof unit.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a roof unit according to a first embodiment.

FIG. 2 is a schematic view showing a roof beam and an intermediate plate.

FIG. 3 is a schematic view showing a butt weld of a roof beam.

FIG. 4 is a schematic view showing a butt welding jig for a roof beam.

FIG. 5 is a schematic diagram illustrating a roof unit according to a second embodiment.

FIG. 6 is a schematic view showing a butt weld of a roof beam.

FIG. 7 is a schematic view showing a butt weld of a roof beam according to a third embodiment.

[Explanation of symbols]

 11A, 41A Roof unit 21, 51 First roof beam (first beam) 22, 52 Second roof beam (second beam) 23, 53 Intermediate plate 24, 54 Backing b Gas release interval

Claims (4)

[Claims] 1. A beam joining structure in which an end portion of a first beam and an end portion of a second beam are welded by abutting each other in a longitudinal direction of the first beam and a second beam. Between the ends of the beams, intermediate plates projecting outwardly from the contours of the ends are interposed, with the ends of the first and second beams respectively on both sides of this intermediate plate. Beam joining structure characterized by butt welding. 2. On both sides of said intermediate plate, behind the butt weld at the end of the first beam and the butt weld at the end of the second beam, The beam joining structure according to claim 1, further comprising a backing. 3. The beam joint structure according to claim 1, wherein each of the first beam and the second beam has the same intersection angle at which the first beam and the second beam intersect and abut on the intermediate plate. 4. A roof unit comprising roof beams joined by the beam joining structure according to claim 1.