JP3191136B2 - Beam and beam welding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to a welding method for joining beams Contact and beams, in particular, the beam contact and the beam shape of the cross section is rectangular
The present invention relates to a method for welding and joining.

[0002]

2. Description of the Related Art Generally, when welding beams having a rectangular cross section or welding between a beam and a column, if the portion to be joined is to be welded from the outside thereof, the welding of the lower surface of the beam requires an upward operation. Therefore, the welding method is problematic. Conventionally, in the case of a box-shaped beam having a large cross-section such as a bridge pier, various welding joining methods have been proposed, for example, in order to avoid the above-described upward welding in construction, a welder works inside a beam.

[0003]

However, for example, as in the case of the beams constituting the mega-structure of architecture,
It has been difficult to weld the lower surface of a beam of a box-shaped beam having a relatively small cross section that cannot be inserted by a welder, for example, because upward welding is inevitable.

In view of the above-mentioned problems, Japanese Patent Publication No.
No. 585 and Japanese Patent Publication No. 39374 describe a technique in which an opening is provided on the side surface of a beam, the lower surface of the beam is welded from this opening, and the opening is closed by welding a lid plate. Although disclosed, it takes time and effort to perform positioning and holding operations at the opening of the lid plate, and cannot solve the above problem fundamentally.

[0005] The present invention has been made in view of the above-welding joint also in the beam of a relatively small cross-section to the extent that can not enter into the welders easily and efficiently perform the beam contact and It is an object of the present invention to provide a method for welding and joining beams .

[0006]

According to the present invention, there is provided a beam .
The joining end faces of the beams having a rectangular cross section are joined to each other, and at least one of an upper wall of each beam and both side walls connected to the upper wall are provided on at least one joining end of each of the beams. A notch is formed by cutting out a part of the side wall of the beam, and a connecting member having an L-shaped or U-shaped cross section that complements the cross-sectional shape of the beam at this portion between or at the notches of each beam. The arrangement of the beams and the welding between the joining surfaces of the connecting members and the connecting members is a means for solving the above problem.

[0007] In the beam according to claim 2, wherein the shape of the cross section is brought into contact with the joint surface of the joining end face pillars of the beam is rectangular, and the upper wall of the beams in the joint end portion of the beam, the upper A notch is formed by cutting out at least one of the side walls of the side walls connected to the wall, and an L-shaped section or a cross section that complements the cross-sectional shape of the beam in this part with a rectangle is formed between the notches. A U-shaped connecting member is disposed, and the joint between the beam, the connecting member, and the column is welded, which is a means for solving the above problem.

According to the third aspect of the present invention, when welding beams having a rectangular cross section to each other, at least one of the joining ends of the beams to be joined is preliminarily provided.
At least one of the side walls of the upper wall of the beam and the side walls connected to the upper wall is partially cut away to form a missing portion, and between these missing portions or the missing portions of each beam. A connecting member having an L-shaped or U-shaped cross section for restoring the cross-sectional shape of the beam to a rectangular shape is prepared, and the joining end faces of the beams are abutted to each other so that the bottom walls of the beams are separated from each other. And welding the two side walls of each beam vertically from the outside, and then disposing the connecting member between the missing portions or between the missing portion and the joining end face of each beam, Welding the beam with each beam is a means for solving the above problem.

According to a fourth aspect of the present invention, when a beam having a rectangular cross section and a column are welded and joined to each other, an upper wall of the beam and an upper wall of the beam are previously attached to a joint end of the beam. A part of at least one of the side walls connected to the wall is cut out to form a notch, and the beam is arranged in the notch of the beam to restore the cross-sectional shape of the beam to a rectangle. A connecting member having an L-shaped or U-shaped cross section is manufactured, the joining end surface of the beam is abutted against the joining surface of the column, and the bottom wall of the beam and the joining surface of the column are downwardly welded. That both side walls of the beam and the joint surface of the column are vertically welded from the outside, and then the connecting member is disposed in a missing portion of the beam, and the connecting member, the beam, and the column are welded. This is means for solving the above problems.

[0010]

In the beam according to the first aspect, the connecting member bears the stress acting between the beams by being welded to each of the missing portions or the joint end faces and the missing portions of the butted beams, Connect the beams together.

In the beam according to the second aspect, the connecting member bears the stress acting between the beam and the column by being welded to the column and the missing portion of the beam, and connects the beams.

In the beam welding method according to the third aspect, by utilizing the notched portion, welding between beams and welding between the beam and the connecting member are performed by standing welding or downward welding to eliminate upward welding. .

[0013] In the beam welding method according to the fourth aspect, by utilizing the missing portion, welding of the beam and the column, welding of the connecting member to the beam, and the column are performed by vertical welding or downward welding, and upward. Eliminate welding.

[0014]

1 to 4 show a first embodiment of the present invention.
This will be described with reference to FIG. In the drawings, reference numerals 1a and 1b denote beams, and 2 denotes a connecting member. Hereinafter, the welding method for joining beams Contact and beams of this embodiment, the beam 1a having a rectangular cross section which is welded and fixed to the column A,
The case where the beam 1b having a rectangular cross section is similarly welded will be described. As shown in FIGS. 1 and 2, the beams 1a, 1b are previously attached to the joint ends 3, 3 of the beams 1a, 1b to be joined.
1b Upper walls 4, 4 and both side walls 5, 5 connected to the upper walls 4, 4
Are cut out to form notched portions 6 and 6. The missing portion 6 is formed in a region extending from the uppermost portion in the height direction of the side wall 5 to a substantially central portion. In addition, each of the side walls 5, 5 and the bottom wall 7 of the joint end 3 of the beams 1a, 1b to be joined,
The positioning plate 8 is welded and fixed in a state where it is projected outward. These positioning plates 8 provided on the beams 1a and 1b are fixed at positions where they are flush with each other when the joining end surfaces 9 and 9 of the beams 1a and 1b are butted against each other.

On the other hand, as shown in FIG.
When the beams 1a and 1b are abutted with each other, a connecting member 2 having a U-shaped cross section is disposed between the cutouts 6 and 6 of the beams 1a and 1b to restore the cross-sectional shape of the beams 1a and 1b to a rectangle. .

When the fabrication of the beams 1a and 1b and the connecting member 2 is completed, first, the beam 1a is welded to the column A. Then, as shown in FIGS. 1, 2 and 4, the beam 1b is lifted and positioned by a crane or the like at the position of the beam 1a.
The joining end faces 9 and 9 of a and 1b are abutted, and the positioning plates 8 and 8 are positioned on the same plane to make the joining end faces 9 and 9 tangent to each other. After the completion of the positioning, each pair of the positioning plates 8, 8 located on the same plane is sandwiched between two connecting plates 10, 10 from both sides thereof, and these positioning plates 8, 8, and the connecting plates 10,
By inserting and fastening a bolt 11 into a bolt hole (not shown) provided in the joint 10, a tangent between the joint end surfaces 9 is maintained. Then, in this state, the bottom walls 7, 7 of the beams 1a, 1b are welded downward from the missing portions 6, 6, of the beams 1a, 1b, and both side walls 5, 5 of the beams 1a, 1b are welded.
Weld each other from outside or inside. When the welding work from the missing portions 6, 6 is completed, as shown in FIG. 3, the connecting member 2 is inserted between the missing portions 6, 6 of the beams 1a, 1b.
Is mounted from above, and the connecting member 2 and each beam 1a, 1
b. At this time, since the bottom surface of the connecting member 2 coincides with the upper surface of the missing portions 6, 6,
By simply placing the device from above, it can be stably positioned between the missing portions 6. After the welding of the beams 1a and 1b is completed, the positioning plates 8, 8 and the connecting plates 10,
Remove all 10 by means such as fusing.

In the beam completed by the above-described welding method, beams 1a and 1b having a rectangular cross section are joined to each other by joining end surfaces 9 and 9, and joining ends 3 and 3 of these beams 1a and 1b are joined. Are formed with upper walls 4 and 4 of the beams 1a and 1b and cutouts 6 and 6 formed by cutting out a part of both side walls 5 and 5 connected to the upper walls 4 and 4, respectively. A connecting member 2 having a U-shaped cross section for complementing the cross-sectional shape of each of the beams 1a and 1b in this portion with a rectangular shape is disposed between the notched portions 6 and 6 of 1b, and joining of the beams 1a and 1b and the connecting member 2 is performed. The end faces 9 and 9 are welded.

According to the above welding method, the beams 1a, 1b
The welding of the bottom walls 7, 7 and the side walls 5, 5 is downward or standing welding, and upward welding is eliminated.
The workability of welding and joining the beams 1a and 1b is improved, and the work efficiency and construction accuracy of welding and joining are improved. Also, the beam 1a,
When the connecting member 2 is welded between the missing portions 6 and 6 after the bottom walls 7 and 7 and the side walls 5 and 5 of 1b are welded to each other, the connecting member 2 is simply placed on the missing portions 6 and 6 from above to be missing. Since it can be stably positioned between the parts 6, 6, the positioning is easy and a special jig for holding is unnecessary, so that the welding operation can be performed efficiently.

According to the beam of this embodiment, the notch 6 extends from the upper wall 4 of the beam 1 to the side walls 5, 5, and the side wall 5 of the notch 6 of the beam 1 is higher than the bottom wall 7. The bottom walls 7, 7, of the beams 1a, 1b butted against each other
It is convenient for the operator to operate the welding tool in the welding work between the side walls 5, 5, and the welding work efficiency and construction accuracy are improved. Further, the connection member 2 and each of the beams 1a and 1b
Because the contact extension with the end face of the missing part 6 is long,
The welding strength between the connecting member 2 and the beams 1a and 1b is ensured, and the beam 1a and the beam 1b are firmly joined.

Hereinafter, a second embodiment of the present invention will be described with reference to FIG. In the figure, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof will be simplified. In the beam and the beam welding method of the present embodiment, the beam 1 having a rectangular cross section is directly welded to the column A. In advance, the upper end 4 of the beam 1 and both side walls 5 connected to the upper end 4 are formed at the joint end 3 of the beam 1.
Is cut out to form a notched portion 6, while a connecting member 2 having a U-shaped cross section that is arranged in the notched portion 6 of the beam 1 and restores the cross-sectional shape of the beam 1 to a rectangle is formed. Make it.
Further, a positioning plate 8 for positioning the beam 1 with respect to the joint surface 12 of the column A is welded to the lower surface of the bottom wall 7 of the joint end portion 3 of the beam 1, while the lower end of the joint surface 12 of the column A is welded. The lower surface of the beam 1 to be joined to the joint surface 12 is placed and fixed to the positioning plate 8 provided on the beam 1 to weld a positioning bracket 13 for accurately positioning the beam 1. Keep it.

When the formation of the notch 6 and the manufacture of the connecting member 2 are completed, the beam 1 is suspended at a position where the joint end 3 is close to the joint surface 12, and the joint end 3 is placed on the positioning bracket 13. The joint end face 9 is accurately butted against the joint face 12 of the column A while placing and positioning the beam 1, and in this state, the positioning plate 8 and the positioning bracket 1 are positioned.
3 is fixed by bolts or the like to form the joint surface 12 of the beam 1.
Hold the tangent to. When the tangent is maintained, the bottom wall 9 of the beam 1 and the joint surface 12 of the column A are welded downward, and the side walls 5 of the beam 1 and the joint surface 12 of the column A are vertically welded from the outside. After that, the connecting member 2 is disposed in the missing portion 6 of the beam 1, and the connecting member 2, the beam 1,
Weld between columns A.

Completed by the above welding and joining methodBeam
Is that the joint end surface 9 of the beam 1 is in contact with the joint surface 12 of the column A,
The joining end 3 of the beam 1 has an upper wall 4 of the beam 1 and an upper wall 4
A notch 6 is formed by cutting out a part of both side walls 5 connected to
Between the notch 6 and the joining surface 12
2, the joint surface between the beam 1, the connecting member 2, and the column A
12 are welded.

According to the welding and joining method of this embodiment, the welding between the bottom wall 7 and the side walls 5 of the beam 1 and the joining surface 12 of the column A is downward or upright welding, and upward welding is eliminated. The workability of welding connection between the beam 1 and the column A is improved,
The work efficiency and construction accuracy of welding are improved. Also,
Also in this embodiment, when the missing portion 6 is closed by the connecting member 2 after welding the bottom wall 7 and both side walls 5 of the beam 1 and the joint surface 12 of the column A, the connecting member 2 is closed. Simply by placing the connecting member 2 on the upper surface, the bottom surface of the connecting member 2 coincides with the upper surface of the notch portion 6 and the connecting member 2 can be stably positioned on the notch portion 6. It is easy and the work efficiency of welding is improved.

According to the above-mentioned beam , the missing portion 6 of the beam 1 extends from the upper wall 4 of the beam 1 to the side walls 5, 5.
Since the side wall 5 of the portion has a lower height from the bottom wall 7, the worker is required to perform a mutual welding operation between the bottom wall 7 of the beam 1, the side walls 5, and the joint surface 12 of the column A, which are butted against each other. Therefore, the operation of the welding equipment is easy, and the welding efficiency and construction accuracy are improved.

In the first embodiment, a part of the structure is changed, and as shown in FIG. 6, the notch 6 is formed in only one of the two beams 1a and 1b abutted against each other. Is also good. In this case, the connecting member 2a is formed in a shape that complements only the missing portion 6 of one of the beams 1. In addition, the notch 6a formed in the beam is formed from the upper wall 4 of the beam 1 to the side walls 5,
5 may be formed in a region extending to only one of them (see FIG. 7). In this case, as the connecting member 2b,
One having an L-shaped cross section suitable for the missing portion 6a is used.

[0026]

As described above, the beam according to claim 1 is provided.
According to each of the missing portion of the beam to each other to be joined are spans at least one side wall of the upper wall of the beam of the side walls, the side wall of the missing portion of the beam, the height from the bottom wall Since the inside of the beam is welded from the missing part, it is easier for the operator to operate the welding equipment in the mutual welding of the bottom wall and both side walls of the beam butted from each other. Work efficiency and construction accuracy are improved.

According to the beam of claim 2 wherein the missing portion of the beams spans at least one side wall of the upper wall of the beam of the side walls, the side wall of the missing portion of the beam, from the bottom wall Since the height is low, the inside of the beam is welded from the missing part, so that the bottom wall, both side walls of the beam and the joint surface of the column where the joint end face of this beam abuts are mutually welded The operator can easily operate the welding equipment in the operation, and the welding operation efficiency and the construction accuracy are improved.

According to the third aspect of the present invention, the welding of the bottom wall and both side walls of the butted beams to each other becomes downward or vertical welding, and the upward welding is eliminated. The workability of joining is improved, and the work efficiency and construction accuracy of welded joint are improved.

According to the beam welding method according to the fourth aspect, the mutual welding between the bottom wall and both side walls of the beam and the joint surface of the column is performed by:
Since downward or standing welding is performed and upward welding is eliminated, the workability of welding and joining is improved, and the work efficiency and construction accuracy of welding and joining are improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a beam according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the beam of the first embodiment.

FIG. 3 is a perspective view showing a beam welding method of the first embodiment.

FIG. 4 is an overall side view showing the beam welding method of the first embodiment.

FIG. 5 is a side view showing a beam according to a second embodiment of the present invention.

FIG. 6 is an overall side view showing another mode of the beam in the first embodiment.

FIG. 7 is a perspective view showing another form of a missing portion formed in the beam and a connecting member for restoring the cross-sectional shape of the beam in the missing portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beam 2 Connecting member 2a Connecting member 2b Connecting member 3 Joining end 4 Top wall 5 Side wall 6 Missing part 6a Missing part 7 Bottom wall 12 Joining surface A pillar

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E04C 3/04 E04B 1/24 E04B 1/54 301 E04B 1/58 503 E04B 1/58 508

Claims (4)

(57) [Claims] 1. A beam having a rectangular cross section is joined with a joining end face of each other, and at least one joining end of each of the beams has an upper wall of each beam and a side wall connected to the upper wall. A cutout is formed by cutting out a part of at least one of the side walls, and a cross section L that complements the cross-sectional shape of the beam in this portion between or between the cutouts of each beam.
A U-shaped or U-shaped connecting member is arranged, and the joint surfaces of these beams and the connecting member are welded.
Beams. 2. A joint end face of a beam having a rectangular cross section is brought into contact with a joint face of a column. The joint end of the beam includes an upper wall of the beam and two side walls connected to the upper wall. At least one of the side walls has a cutout formed by cutting out a part of the side wall, and between the cutouts, a connecting member having an L-shaped or U-shaped cross-section that complements the cross-sectional shape of the beam at this portion into a rectangle. A beam, wherein the beams, the connecting members, and the joint surfaces of the columns are welded . 3. When welding beams having a rectangular cross-section to each other by welding, at least one of a joining wall of at least one of an upper wall of the beam and both side walls connected to the upper wall is connected to at least one joint end of the beam to be joined. A part of one of the side walls is cut out to form a cutout, and the L-shaped cross section is arranged between the cutouts of the beams or at the cutouts to restore the cross-sectional shape of the beam to a rectangle. Alternatively, make a U-shaped connecting member, butt the joining end faces of each beam, weld the bottom wall of each beam downward from the missing part of these beams, and connect the two side walls of each beam from outside. Beam welding, wherein the connecting member is disposed between the missing portions of the beams or between the missing portions and the joining end faces, and the connecting members are welded to the beams. Method. 4. When welding a beam having a rectangular cross section and a column to a beam, at least one of an upper wall of the beam and both side walls connected to the upper wall is connected to a joint end of the beam. One of the side walls is cut out to form a notch, while the beam is arranged in the notch of the beam to restore the cross-section of the beam to a rectangular shape. A member is manufactured, and the joint end surface of the beam is abutted against the joint surface of the column, the bottom wall of the beam and the joint surface of the column are welded downward, and both side walls of the beam and the joint surface of the column are welded. Characterized in that the connecting member is disposed in a missing portion of the beam, and the connecting member, the beam, and the column are welded to each other.