JPH0860740A - Column-column connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] A column-to-column joint structure that does not require on-site welding, does not form protrusions on the outer wall of the column that hinder design or construction, and does not deform at the joint. provide. [Structure] An engaging portion 3A which is preliminarily welded to the ends of the respective steel pipe columns 2 to be joined to each other and is continuous over the entire inner circumference of the inner wall, and a reinforcing rib 3B extending between the engaging portion 3A and the inner wall. A joining structure of a pillar and a pillar for joining the steel pipe pillars 2 to each other by joining the joining pieces 3 with each other, and the engaging portion 3 when joining the joining pieces 3 to each other.
A fastening member 5 and a fastening member 5 for holding the A pieces together and binding the engaging portions 3A to each other when they are attracted toward the inner wall of the joining piece 3 and fastening the joining pieces 3 by the binding. A column-to-column joining structure, characterized in that an attracting means for attracting toward the inner wall of the joining piece 3 is provided, and both sides of the fastening material 5 attracted by the attracting means are fitted to the reinforcing ribs 3B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-to-column joining structure, and more particularly, to a column-to-column structure in which a so-called end of a square steel pipe column or a round steel pipe column has a closed type cross section at the time of joining. It is related to the joint structure of.

[0002]

2. Description of the Related Art Generally, as a joining structure of square steel pipe columns or round steel pipe columns, a welding structure by field welding,
Alternatively, a joint structure using bolts is adopted. In the conventional on-site welding joint structure, gusset plates with bolt holes are previously welded to each joint end of each column, and these plates are temporarily fixed with bolts on site through another plate. After welding the ends of the columns in this state, the gusset plate is cut to join the steel pipe columns to each other. Further, in the conventional bolted structure, as shown in FIG. 6, a joining plate 70 is welded to the ends of the rectangular steel pipe columns 2 and 2, the joining plates 70 are aligned, and the bolts 72 are inserted into the bolt holes of the joining plate 70. Through
Fasten with a nut or the like to join the square steel pipe columns 2 and 2.

[0003]

In the case of the conventional field welded joint structure, a gusset plate is welded as a preparatory step, the bolt is tightened on site, the bolt is removed after the pillar is welded, and the gusset plate is removed. It takes a lot of work. In addition, the joints at the ends of the steel pipe have relatively weak strength and are easily deformed. Furthermore, it is difficult to control the quality of on-site welding, and from the viewpoint of safety due to the use of fire, the current trend is not to perform on-site welding.
On the other hand, in the case of the joining structure using bolts, as shown in FIG. 6, the joining plate 70 projects from the column 2, and the projecting portion 70A becomes an obstacle for subsequent construction or design.
Therefore, the present invention does not require on-site welding or the like, and does not cause protrusions on the outer wall of the pillar that may interfere with design or construction, and does not cause deformation or the like at the joint portion. It is intended to provide a structure.

[0004]

According to the present invention, the ends of the respective steel pipe columns 2 and 2 to be joined to each other are pre-welded and joined together.
Also, a joining piece 3 having projecting engaging portions 3A, 3A for joining that are continuous over the entire inner circumference of the inner wall and projecting reinforcing ribs 3B, 3B, ... Between the engaging portions 3A, 3A and the inner wall. , 3 by jointing the steel pipe columns 2,
In a column-to-column joining structure for joining two pieces, the engaging portions 3A, 3A are combined with each other when the joining pieces 3, 3 are joined, and the engaging portions 3A, 3A are held together. Also, the fastening members 5, 5 that fasten the engaging portions 3A, 3A to each other when pulled toward the inner walls of the joining pieces 3, 3 and fasten the joining pieces 3, 3 by the fastening. , And the fastening materials 5, 5 ...
3 is provided with attracting means for attracting toward the inner wall, and both sides of the fastening members 5, 5 ... attracted by the attracting means are fitted to the reinforcing ribs 3B, 3B ,. The above object is achieved by providing a column-to-column joining structure.

[0005]

[Operation] The joining piece is welded to the steel pipe column in advance, and when the upper end of the steel pipe column on the lower floor and the lower end of the steel pipe column on the upper floor are joined, the entire inner circumference of the inner wall of each joining piece The continuously provided joining engaging portions are also combined. Further, it is possible to easily form an insertion hole such as an attracting bolt as an attracting means on the joining surface by joining the joining pieces, and to pull the fastener from the outside toward the inner wall of the joining piece by the attracting means. it can. For this reason, the joining engaging portions of the joining piece can be tightly connected to each other at the gripping portions by the fastening material that is accommodated inside the closed mold of the joining steel pipe column. In this case, reinforcing ribs (improving the strength of the diaphragm, etc.) for preventing deformation of the joining piece are fitted to the fastening material, and the strength is further increased at the joining portion. As a result, the steel pipe columns are reliably joined together.

Further, the attracting means is composed of attracting bolts and nuts, and a notch is formed around the through hole of the attracting bolt formed by the joining surface of the joining pieces.
Therefore, when the nut is screwed onto the attracting bolt and the fastening material is attracted to join the joining pieces together, the nut fits inside the notch. Therefore, no protrusions of the joining plate are formed outside the steel pipe column, and there is no problem in terms of design and construction.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a pillar-to-column joining structure according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a joining state of joining pieces of a column-to-column joining structure according to the present embodiment, and FIGS. 2 (a) and 2 (b) show a fastening material showing an inner wall surface of the joining piece. Cross-sectional views of before and after
FIG. 3 is a perspective view of the joining piece in a joined state, and FIGS. 4 (a) and 4 (b) are perspective views of a fastening material.

As shown in FIG. 1, a column-to-column joining structure 10 according to the present embodiment includes steel pipe columns 2 which are joined to each other.
The projecting engaging portions 3A, 3A for welding, which are pre-welded to the end portions of the two and are continuous over the entire inner circumference of the inner wall, and the projecting reinforcing ribs 3B extending between the engaging portions 3A, 3A and the inner wall. , 3
A column-to-column joining structure 10 for joining the steel pipe columns 2 and 2 by joining the joining pieces 3 and 3 having B, ... Then, when the joining pieces 3 and 3 are joined, the engaging portions 3A and 3A are combined with each other,
When the engaging portions 3A, 3A that are to be combined are grasped and attracted toward the inner walls of the joining pieces 3, 3,
The fastening members 5, 5 ... For fastening the engaging portions 3A, 3A to each other and fastening the joining pieces 3, 3 by the fastening, and the fastening members 5, 5 ... To the inner walls of the joining pieces 3, 3. An attracting means for attracting toward each other is provided, and both sides of the fastening materials 5, 5, ...
B, 3B, ...

The column-to-column joining structure 10 of this embodiment will be further described. As shown in FIG. 1, each joining piece 3 is attached to the lower end of the upper rectangular steel tube column 2 and the upper end of the lower rectangular steel tube column 2. Are welded beforehand in the factory. The joining piece 3 is formed of cast steel or forged steel into a square tube in accordance with the diameter of the square steel tube column 2, and the projecting engagement portion 3A and the reinforcing ribs 3B, 3B, ... Are continuously formed over the entire inner circumference of the inner wall. It is formed. As shown in FIGS. 2 and 3, the joining surfaces 3a of the joining pieces 3 and 3 are combined with each other to form recesses 8A for forming the insertion holes 8 of the attracting bolts 7, respectively. It on the other hand,
The opposite surface of the engaging portion 3A that does not form the joining surface 3a is the tapered surface 3
b. Furthermore, at a predetermined position on the joint surface 3a,
As shown in FIG. 1, a hole 11a is formed together with the fitting piece 11b for preventing the joining pieces 3 from being displaced from each other and facilitating positioning. When the joining pieces 3 and 3 are joined, the fitting piece 11b is joined to the joining piece 11b. The upper and lower holes 11 provided on the surface 3a
It is adapted to be fitted to a and 11a. Joining piece 3
The portion of the outer wall where the concave portion 8A is formed is a notch portion 12, and the nut 9 that is screwed into the screwing portion 7B of the attracting bolt 7 is positioned.

As shown in FIGS. 2 and 4, the fastening member 5 has a recess 6 formed between the protrusions 5B and 5B provided at the upper and lower ends of the fastening member 5 having a substantially U-shaped side cross section. The engaging portions 3A and 3A of the joining piece 3 which are fitted to each other are gripped.
An attachment hole 13 for the attracting bolt 7 is formed in the fastening member 5, and when the attracting bolt 7 is inserted into the attaching hole 13, the attracting bolt 7 is locked to the fastening member 5 by the bolt head 7A. Further, only the periphery of the mounting hole 13 is thickened to form a reinforcing portion 5A, and the reinforcing portion 5A joins the pillars by increasing the depth of the mounting hole 13. When it plays, it works to increase its strength. Both sides of the fastening material 5 are fitted between the reinforcing ribs 3B and 3B formed on the joining piece 3.

In such a pillar-to-column joining structure 10, first, the fastening member 5 is attracted to the inner wall of the joining piece 3 by the attracting bolt 7, so that the engaging portion 3 of the joining piece 3 is engaged.
A and 3A are fitted in the recess 6 of the fastening material 5 and are tightly connected to each other via the tapered surface 3b. Further, the joining piece 3 is prevented from being deformed in the axial direction and the radial direction by the engaging portion 3A which is continuously provided on the inner wall of the joining piece 3 along the entire inner circumference thereof, and also by the reinforcing rib 3B in the axial direction. And radial deformation is prevented. The above joining pieces 3, 3
In the joined state, the fastening member 5 has the reinforcing ribs 3
It is fitted to B and is prevented from slipping on the inner wall of the joining piece 3 by the reinforcing rib 3B. Furthermore, the fastening material 5
Reinforcing portion 5A enhances the strength of mounting hole 13 and is a fitting portion provided on the inner wall side of insertion hole 8 of joining pieces 3 and 3 so that fastening material 5 does not shift on the inner wall of joining piece 3. 1
Fit in 4. Therefore, the joining piece 3 and the fastening material 5 are integrated, and the joining pieces 3 and 3 are firmly joined to each other,
As a result, the square steel pipe columns 2 and 2 are strongly joined together. Further, on the outer wall of the joining piece 3, the nut 9 is located in the notch portion 12, the nut 9 is screwed with the attracting bolt 7, and the attracting bolt 7 is attracted from the outside. Therefore, the nut 9 and the attracting bolt 7 do not protrude much from the outer wall of the joining piece 3, and there is no problem in design and construction.

Therefore, in such a structure, the nut 9 is screwed into the screwing portion 7B of the attracting bolt 7 on the outside of the rectangular steel tube column 2, and the attracting bolt 7 is attracted to tighten the fastening material 5. Thus, the ends of the square steel pipe columns 2 have a closed cross section at the time of joining, and the columns can be reliably joined to each other without the need for on-site welding.

Next, another embodiment of this embodiment will be described with reference to FIG. FIG. 5 is a vertical cross-sectional view of a pillar-column joining structure according to another embodiment. The pillar-to-column joining structure 20 according to the present embodiment has substantially the same configuration as that of the embodiment shown in FIG. 1, and the same members as those in the embodiment shown in FIG. Although detailed description thereof will be omitted, the points different from the embodiment of FIG. 1 are that the square steel tube columns 2 on the lower floor are joined via a square tubular member 22 for beam joining and the joining piece 3 described above. This is the point at which the backing annular member 40 is used when welding the square tubular member 22 or the square steel tube column 2 by welding. The end plate 24 of the H steel beam 23 is brought into contact with the outer wall surface of the beam-joining rectangular tubular member 22. The end plate 24 is formed with an insertion hole 26 corresponding to the bolt hole 25 on the outer wall surface.

In such a structure, first, the bolt 27 is inserted into the respective through holes 25, 26 from the inside through the opening of the joining piece 3 welded to the upper end of the rectangular tubular member 22, and the nut 28 is used for the beam from the outside. Attach 23. next,
The opening is combined with the rectangular steel tube column 2 and the joining piece 3 on the upper floor to form a closed type, and then the nut 9 of the attracting bolt 7 is fastened in the same manner as in the above embodiment, and the joining with the rectangular steel tube column 2 is completed. To do. Therefore, in such a structure, the beam 23 and the column 2 can be fixed from the outside.

In the above embodiment, the fastening material 5 and the attracting bolt 7 are used.
Although it is a separate body, it may be integrally formed if necessary, and the position where the nut 9 is housed is the cutout portion 12. However, if the nut 9 is well housed, it may be a recess or other shape. In the above-described embodiment, the hole 11a and the fitting piece 11b are provided for the purpose of preventing the displacement of the joining pieces 3 and positioning, but another mechanism, for example, providing a convex portion on one joining piece and the other joining piece. By providing a recess in 3,
The displacement and the positioning of the joining pieces 3 may be performed. Further, in the above embodiment, the square steel pipe column has been described, but the present invention is not limited to this, and as long as it is a steel pipe column,
It can be applied to this embodiment, and may be, for example, a round steel pipe column or a polygonal steel pipe column.

[0016]

INDUSTRIAL APPLICABILITY The column-column joining structure according to the present invention does not require on-site welding or the like, and does not cause protrusions on the outer wall of the column that may interfere with design or construction. Deformation does not occur.

[Brief description of drawings]

FIG. 1 is a perspective view showing a joining state of joining pieces of a pillar-to-column joining structure according to the present embodiment.

[FIG. 2] (a) and (b) show the inner wall surface of the joining piece,
It is sectional drawing before and after drawing a fastening material.

FIG. 3 is a perspective view of a joined piece in a joined state.

4 (a) and 4 (b) are perspective views of a fastening material.

FIG. 5 is a vertical cross-sectional view of another pillar-to-column joining structure according to the embodiment.

FIG. 6 is a perspective view of a conventional post-column connection structure.

[Explanation of symbols]

 2 Rectangular steel pipe column 3 Joining piece 3A Engaging part 3B Reinforcing rib 5 Fastening material 5A Reinforcing part 5B Projecting part 7 Pulling bolt 7B Screwing part 8 Insertion hole 9 Nut 13 Mounting hole

Claims (4)

[Claims] 1. Steel pipe columns 2, 2 which are joined together.
Protruding engagement portions 3A, 3A for welding, which are preliminarily welded and joined to the end portion of the inner wall and are continuous over the entire inner circumference of the inner wall, and the engaging portion 3
Reinforcement ribs 3B, 3 protruding between A, 3A and the inner wall
A joining structure of a column and a column for joining the steel pipe columns 2, 2 by joining the joining pieces 3, 3 having B, ... Part 3A,
3A are combined with each other, and the engaging portions 3A, 3A with which the combination is formed
A fastening member 5 that holds the members 3A and 3A tightly when they are attracted toward the inner walls of the members 3 and 3 and that fastens the members 3A and 3A by the tightening. , 5 ..., And attracting means for attracting the fastening materials 5, 5 ... Towards the inner walls of the joining pieces 3, 3 are provided, and both sides of the fastening materials 5, 5 ,. A column-to-column joining structure characterized by being fitted to the reinforcing ribs 3B, 3B ,. 2. The joining means comprises the joining pieces 3, 3
The one end is attached to the attachment hole 13 of the fastening member 5 by being inserted into the insertion hole 8 formed by the joining surfaces 3a, 3a of each other, and the threaded portion 7B at the other end is arranged outside the joining piece 3. The pulling bolt 7 and the nut 9 that is screwed into the screwing portion 7B of the pulling bolt 7 are used. By thickening only the peripheral portion of the mounting hole 13 of the fastening material 5,
While forming the reinforcing portion 5A for reinforcing the mounting hole 13,
The pillar-to-column joining structure according to claim 1, wherein projecting portions 5B that engage with the engaging portions 3A are formed at upper and lower ends of the fastening member 5. 3. The pillar-to-column joining structure according to claim 3, wherein a notch 12 or a recess for accommodating the nut 9 is formed on an outer wall of the joining piece 3. 4. The column-to-column joint structure according to claim 1, wherein at least one of the steel pipe columns 2 and 2 is a beam-joining steel pipe to which beams are joined. .