JPH07207769A - Joining structure for column to column - Google Patents

Abstract

PURPOSE:To easily join columns or the like together by arranging a connecting bolt which joins mutual joining members together and has engaging holes to engage with rotary operation jigs and a spacer which is loosely fitted to the bolt and has jig inserting holes. CONSTITUTION:Square steel pipe columns 2 to which diaphragm nuts 3 are beforehand welded are butted againt each other, Next, a male screw part 5B of a connecting bolt 5 fitted and inserted in a spacer 7 is slightly screw-fitted to a female screw part 3A of the nut 3, and a male screw part 5A is adjusted to a female screw part 3A. Next, rotary operation jigs 9 are inserted in inserting holes 8 of the spacer 7, and are engaged with engaging holes 6 of the connecting bolt 5. When the connecting bolt 5 is further rotated, the nuts 3 approaches each other, and the spacer 7 becomes immovable by fastening pressure of the nuts 3, and the steel pipe columns 2 are joined together.

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 means for joining square steel pipe columns or round steel pipe columns to each other, on-site welding or a bolting method is adopted. In the field welding, 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, and in this state of the column After welding the end portions, the gusset plate is cut. The conventional bolt joining method is shown in FIG.
As shown in FIG. 3, the joining plate 70 is welded to the end portion of the rectangular steel pipe column 2, and the joining plates 70 are aligned to each other.
The bolt 72 is passed through the bolt hole and is fastened with a nut or the like.

[0003]

However, in the conventional column-to-column joint structure, welding is performed in the field. Therefore, a gusset plate is welded as a preliminary preparation, bolts are tightened in the field, and the bolt is welded after the column is welded. It takes a lot of work to remove the gusset plate and remove it. 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 bolt joining, the joining plate 70 projects from the pillar 2, and the projecting portion becomes an obstacle for subsequent construction or design.

Therefore, the inventors of the present application provide a welding piece for joining the joining pieces between the pillars and fasten the joining pieces to each other from the outside of the joining portion, thereby performing on-site welding and eliminating obstacles in design. However, further improvement is desired (Japanese Patent Application No. 5-123758). Therefore, the present invention does not require field welding or the like between columns and can be easily mounted,
It is an object of the present invention to provide a column-to-column joint structure having sufficient strength at the joint.

[0005]

According to the present invention, the above-mentioned steel pipe columns are joined together by joining the joining members which are pre-welded to the ends of the respective steel pipe columns to be joined to each other and which have a female screw portion. It is a joint structure of pillars,
Reversed male screw portions are formed on the side walls from both ends, respectively, and the joining members are joined together via the male screw portion and the female screw portion of the joining member, and the rotary operation cure is performed at the approximate boundary between the male screw portions. A connecting bolt having at least one engaging hole for engaging with the tool, and a spacer having a cylindrical body loosely fitted to the connecting bolt and having a hole for inserting a rotary operation jig on a side wall thereof. The above object has been achieved by providing a column-to-column joining structure.

[0006]

The above-mentioned joining member is welded to each steel pipe column in advance. 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, female threads on the inner wall of each joining member are joined. If, for example, the joining member is a diaphragm nut, its threaded portion faces. Then, the male screw portion at the upper end of the connecting bolt in which the spacer is already fitted is screwed into the upper diaphragm nut, and the male screw portion at the lower end is screwed into the lower diaphragm nut.

Next, a rotary operation jig or the like is inserted into the insertion hole of the spacer, and its tip is engaged with the engagement hole of the connecting bolt.
Rotate the connecting bolt. The male screw portion and the female screw portion are deeply screwed by the rotation of the connecting bolt, and the joining members are firmly fastened with the spacer interposed therebetween. Thereby, the pillars can be easily and firmly joined together without welding.

[0008]

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 an exploded perspective view of a pillar-column joint structure according to the present embodiment, FIG. 2 is a partial side sectional view of a pillar-column joint structure according to the present embodiment, and FIG. It is sectional drawing which followed the II line.

As shown in FIG. 1, a column-to-column joining structure 1 according to the present embodiment has respective rectangular steel pipe columns 2 to be joined together.
The joint structure of the pillar and the pillar that joins the steel pipe pillars 2, 2 by joining the diaphragm nut 3 that has been welded in advance to the end of the and has the female screw portion 3A, The male screw portions 5A and 5B are formed respectively, and the diaphragm nuts 3 and 3 are joined to each other via the male screw portions 5A and 5B and the female screw portion 3A of the diaphragm nut 3 and rotated at the approximate boundary between the male screw portions 5A and 5B. A connecting bolt 5 having at least one or more engaging holes 6 for engaging the operating jig 9; and a spacer 7 having a through-hole 8 for inserting the rotating operating jig 9 in a side wall of a tubular body loosely fitted to the connecting bolt 5. It is equipped with.

The pillar-to-column joining structure 1 of this embodiment will be further described. As shown in FIGS.
Each diaphragm nut 3 is welded to the lower end of the square column and the upper end of the rectangular steel pipe column 2 on the lower floor through the backing metal fitting 4 in advance in a factory or the like. The diaphragm nut 3 is formed of cast steel or forged steel according to the diameter of the square steel pipe column 2, and the female screw portion 3 is formed in the substantially central portion.
A is formed. In addition to the diaphragm nut 3, as long as a joining member having a female screw portion formed on the inner wall thereof fulfills the above-mentioned role, the use thereof is not particularly limited, but the joining member may be the diaphragm nut 3 as in this embodiment.
It is desirable to make the joints of the columns 2 and the columns 2 have sufficient strength.

A connecting bolt 5 and a spacer 7 are arranged between the diaphragm nuts 3 and 3. The connecting bolt 5 is a substantially columnar member and has a male screw portion 5A on the upper portion of its side wall.
And a male screw portion 5B in the lower part, and the male screw portion 5A and the male screw portion 5B are screwed in directions opposite to each other. Male screw part 5
Engagement holes 6, 6 that engage with the rotary operation jig 9 are formed at substantially the boundary between A and 5B, and the engagement hole 6 has a shape having a long diameter in the axial direction.

The spacer 7 is a ring member having a constant width and is loosely fitted on the connecting bolt 5. Further, from the side wall of the spacer 7, the insertion hole 8 for the rotation operation jig 9 is formed.
When the spacer 7 is attached to the connecting bolt 5, the rotation operating jig 9 is inserted into the insertion hole 8 and the connecting bolt 5 is formed.
The engaging hole 6 is engaged.

Next, the method of assembling the column-column joining structure 1 will be described. First, as shown in FIG. 1, the square steel pipe columns 2 and 2 to which the diaphragm nut 3 has been welded in advance are butted. Then, the male screw portion 5B at the lower portion of the connecting bolt 5 on which the spacer 7 is already fitted is replaced with the female screw portion 3A of the diaphragm nut 3.
Then, the upper male screw portion 5A of the connecting bolt 5 is aligned with the female screw portion 3A of the upper diaphragm nut 3. Then, the rotation operation jig 9 is inserted into the insertion hole 8 of the spacer 7.
And engage the engaging hole 6 of the connecting bolt 5 to rotate the connecting bolt 5.

With the rotation, the upper and lower diaphragm nuts 3,
The distance of 3 is shortened, and finally the distance of leaving the width of the spacer 7 is approached. Then, when the spacer 7 becomes immobile due to the fastening pressure from the upper and lower diaphragm nuts 3 and 3, the joining of the rectangular steel pipe columns 2 and 2 is completed. In this case, since the spacer 7 is provided, the rotation operation jig 9
Can be easily pulled out from the engaging hole 6 of the connecting bolt 5. Further, even if the screwing ratios of the male screw portions 5A and 5B with respect to the upper and lower diaphragm nuts 3 and 3 are different, the engaging hole 6 has a long diameter. It can be tightened by the rotating operation jig 9 until 7 is completely immobile.

Therefore, the diaphragm nuts 3, 3 are firmly fastened to each other with the spacer 7 sandwiched therebetween, and the square steel pipe column 2 and the square steel pipe column 2 can be joined easily and firmly without welding. In the above embodiment, the rectangular steel pipe column 2 is 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, for example, a round steel pipe column or a polygonal steel pipe column. But it's okay.

[0016]

EFFECTS OF THE INVENTION In the column-to-column joining structure according to the present invention, the on-site welding of columns is not necessary and they can be easily attached, and the joints have sufficient strength.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a column-column joining structure according to the present embodiment.

FIG. 2 is a partial side sectional view of a pillar-to-column joining structure according to the present embodiment.

3 is a cross-sectional view taken along the line I-I of FIG.

FIG. 4 is a perspective view of a conventional post-column joining structure.

[Explanation of symbols]

 1 Column-to-column joint structure 2 Rectangular steel tube column 3 Diaphragm nut 3A Female screw part 4 Backing metal fitting 5 Connecting bolt 5A Upper male screw part 5B Lower male screw part 6 Engagement hole 7 Spacer 8 Insertion hole 9 Rotating operation jig

Claims (3)

[Claims] 1. A column-to-column joining structure for joining steel pipe columns to each other by joining joining members which are preliminarily welded to each other and which have respective female threaded portions, to each other to join the steel pipe columns. And opposite side male screw portions are formed on the side wall from both ends, respectively, and the joining members are joined to each other via the male screw portion and the female screw portion of the joining member, and substantially at the boundary between the male screw portions. A connecting bolt having at least one engaging hole for engaging with the rotating operation jig; and a spacer having a cylindrical body loosely fitted to the connecting bolt and having an insertion hole for the rotating operation jig on its side wall. A pillar-to-column joint structure characterized by this. 2. The pillar-to-column joining structure according to claim 1, wherein the engagement hole has a long diameter in the axial direction of the connecting bolt. 3. The column-to-column joining structure according to claim 1, wherein the joining member is a diaphragm nut welded to an end portion of the steel pipe column.