JPH07314173A - Production of diaphragm built-in type steel column - Google Patents

Abstract

PURPOSE:To make it possible to mount a diaphragm into a steel column without dividing the iron column, to facilitate production and to improve the rigidity of the column. CONSTITUTION:The iron column 1 which is internally hollow is prepd. and drilled parts 2 along its outer periphery are formed at the iron column 1. On the other hand, the thick planar diaphragm 3 to be built into the iron column 1 is prepd. The diaphragm 3 is inserted into the iron column 1 from the aperture at its one end. The inner edge of the drilled parts 2 and the diaphragm 3 are then welded in the state of aligning the positions of the drilled parts 2 and the diaphragm 3 body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a steel column in which the strength is improved by incorporating a diaphragm.

[0002]

2. Description of the Related Art Generally, a steel pillar used as a pillar of a building has a hollow interior, and a beam is connected to the steel pillar.

However, since such a steel column is a mere tubular body, the rigidity as a column may be insufficient, and it is necessary to reinforce the steel column particularly at the connecting portion with the beam. Therefore, generally, a partition plate-shaped diaphragm is welded into the steel column to reinforce the steel column.
As such, there is one shown in FIGS. 4 and 5. This is a steel column having rounded corners and a rectangular cross section, which is divided into two along the longitudinal direction.
1 can be integrated by welding (16, 17). Prior to this welding, the diaphragm 12 is welded to one steel column 10 and the diaphragm 13 is welded to the other steel column 11. The diaphragms 11 and 12 form vertical portions 14 and 15 by raising one end edge of a rectangular flat plate to secure the strength against twisting.

By using such a manufacturing method, the strength can be improved, and beams (not shown) can be more firmly connected. Incidentally, Japanese Patent Application Laid-Open No. 61-122359 also shows a steel column vertically divided into two.

[0005]

However, in the above-mentioned conventional one, since a manufacturing method of joining two disassembled steel columns by welding is adopted, many steps are required for manufacturing. For this reason, there is a problem that it is necessary to complete it in advance before construction, and so-called on-site alignment becomes difficult. Further, there is a problem that the manufacturing is complicated and the cost is high.

That is, it is necessary to hold a heavy steel column at an appropriate position. Also, it is necessary to weld the diaphragm while holding the steel column in an appropriate position.
The two points cause a decrease in productivity.

Moreover, since the steel column is divided into two parts, it is unavoidable that the strength is inferior to the integral type. The present invention has been made in view of the above matters. First, it is possible to mount a diaphragm inside without dividing a steel column, which facilitates manufacturing and improves rigidity. A method of manufacturing a diaphragm-inner type steel column is provided. Secondly, it is a technical object to provide a method of manufacturing a diaphragm-internal type steel column that enables more accurate positioning of the diaphragm.

[0008]

The present invention has the following methods in order to solve the above technical problems. That is, in the first method, a steel column 1 having a hollow inside is prepared, and a perforated portion 2 along the outer circumference is formed in the steel column 1. In addition,
The steel column 1 may be square or circular.

The perforated portion 2 is preferably a long hole, but may be formed by arranging circular holes. On the other hand, a thick plate-shaped diaphragm 3 to be installed in the steel column 1 is prepared. The thickness of the diaphragm 3 needs to be larger than the width of the perforated portion 2. Particularly when the diaphragm is a thin plate, a leg portion 5 for holding the diaphragm is formed at an edge portion 4 of the diaphragm 3 at right angles to the longitudinal direction of the steel column 1. The leg portion 5 abuts on the inner surface of the steel column 1, and its shape may be such that the diaphragm 3 can be supported so as not to fall in the steel column before being fixed by welding. For example, it can be formed by a method of welding a bent iron plate to the diaphragm 3. However, if the diaphragm has a sufficient thickness and is hard to fall to some extent, it is not always necessary to form the leg portion 5.

Then, the diaphragm 3 is inserted from one end of the steel column 1 and moved to the perforated portion. Then, the inner edge of the perforated portion 2 and the diaphragm 3 are welded while the positions of the perforated portion 2 and the main body of the diaphragm 3 are aligned.

On the side edge surface 4 of the diaphragm 3,
A mark 6 may be formed for alignment with the perforated portion 2. Here, the mark 6 can be formed, for example, by forming a groove along the longitudinal direction of the side edge surface 4 of the diaphragm 3. Also,
It is needless to say that this mark can be formed by a visually recognizable means such as painting, in addition to the groove.

[0012]

The diaphragm 3 is slid inside the steel column 1 by inserting the diaphragm 3 into the inside of the steel column 1 through one end opening and pressing it with a rod or the like. At this time, if the leg portion 5 is provided, the diaphragm 3 can be effectively prevented from falling and can be smoothly slid.

Then, the inner edge of the perforated portion 2 and the diaphragm 3 are welded while the positions of the perforated portion 2 and the main body of the diaphragm 3 are aligned with each other. As described above, according to the invention, the diaphragm 3 can be mounted inside without dividing the steel column 1 as in the conventional case. Therefore, the manufacturing of steel columns becomes easy. Therefore, it is possible to manufacture it according to the situation of the site, and it is possible to realize the so-called "post-processing" workability and expand the applicable range.

Further, if necessary, the rigidity of the steel column can be easily improved later. Further, according to the method of claim 3, since the mark for aligning with the perforated portion is formed on the side edge surface of the diaphragm, the diaphragm can be positioned more accurately.

[0015]

【Example】

<Embodiment 1> Embodiment 1 of the present invention will be described with reference to FIGS.

In this embodiment, a hollow steel column is used.
The rigidity of No. 1 is increased. This steel column 1 has a square cross section and is used as a column for construction. First, the steel pillar 1
Then, the perforated portion 2 is formed along the outer circumference. As shown in FIG. 2, the perforated portions 2 are elongated holes that are orthogonal to the longitudinal direction of the steel columns 1, and two perforations are provided on each of the facing surfaces of the steel columns 1.

The perforated portion 2 is preferably the long hole described above, but it may be formed by arranging circular holes. A thick plate-shaped diaphragm 3 is installed in the steel column 1. The outer shape of the diaphragm 3 is the same as the inner surface of the steel column 1, and is slidably fitted inside the steel column 1. A through hole 3a is formed at the center of the diaphragm 3. This through hole 3a
Therefore, the entire pillar can be filled later with concrete.

Legs 5 for holding the diaphragm are formed at an edge 4 of the diaphragm 3 at right angles to the longitudinal direction of the steel column 1. This leg portion 5 is formed by bending a rectangular iron plate at two bent lines 5a, 5a at 45 degree intervals. Two pairs of the leg portions 5 are welded to each of both surfaces of the lower edge portion of the diaphragm 3.

It is to be noted that the leg 5 may have any shape as long as the diaphragm 3 does not fall down. For example, a method of bending an iron rod and welding it to the diaphragm 3 can be adopted. Further, only one set may be provided on both surfaces of the lower edge portion of the diaphragm 3, and it is not always necessary to provide it on both ends. Grooves are formed on both side surfaces of the diaphragm 3 and serve as marks 6 to be described later.

Here, it is necessary that the thickness of the diaphragm 3 is larger than the width of the perforated portion 2. Then, the diaphragm 3 is inserted from one end of the steel column 1. At this time, since the lower edge of the leg portion 5 contacts the inner surface of the steel column 1,
The diaphragm 3 is always held at right angles to the longitudinal direction of the steel column 1.

Here, the diaphragm 3 is advanced until it coincides with the position of the perforated portion 2 of the steel column 1. At this time, the inner edge of the perforated portion 2 and the diaphragm 3 are welded 7 with the mark 6 aligned with the center of the perforated portion 2.

As described above, the steel columns can be manufactured on-site, which improves the workability and the strength of the steel columns. <Second Embodiment> A first embodiment of the present invention will be described with reference to FIG.

In the above-described embodiment, two perforations 2 are provided on each of a pair of opposing surfaces of the steel column 1, but in the present embodiment, the perforations 2 are provided on all four sides of the steel column. Therefore, the diaphragm 3 and the steel column 1 can be more firmly integrated. The other manufacturing method is the same as that of the first embodiment, and thus the description thereof is omitted.

[0024]

According to the method of the present invention, the diaphragm is inserted from one end opening of the steel column, and the inner edge of the perforated portion and the diaphragm are aligned with the perforated portion and the diaphragm main body being aligned with each other. Since the welding is performed, the diaphragm can be mounted inside the steel column without dividing it. Therefore, the steel columns can be easily manufactured and can be manufactured on site. It also has the effect of improving the rigidity of the columns.

[Brief description of drawings]

FIG. 1 is a plan view of a steel column having a diaphragm mounted therein according to an embodiment of the present invention.

FIG. 2 is a side view of a steel column having a diaphragm mounted therein according to an embodiment of the present invention.

FIG. 3 is a plan view of a steel column having a diaphragm installed therein according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a conventional steel column having a diaphragm mounted therein.

FIG. 5 is a perspective view of a conventional steel column having a diaphragm mounted therein.

[Explanation of symbols]

 1 ・ ・ Steel column, 2 ・ ・ Perforated part, 3 ・ ・ Diaphragm, 4 ・ ・ Edge part, 5 ・ ・ Leg part, 6 ・ ・ Mark.

Claims (3)

[Claims] 1. A steel column having a hollow interior is prepared, and the steel column is
While forming a perforated portion along the outer circumference, prepare a thick plate diaphragm to be installed in this steel column, after moving the diaphragm to the perforated portion by inserting the diaphragm from one end opening of the steel column, A method for manufacturing a steel column with a built-in diaphragm, comprising welding the inner edge of the perforated portion and the diaphragm in a state where the positions of the perforated portion and the diaphragm main body are aligned with each other. 2. The inner steel diaphragm type steel according to claim 1, wherein a leg portion for contacting an inner surface of the steel column and holding the diaphragm at a right angle to a longitudinal direction of the steel column is formed at an edge portion of the diaphragm. Pillar manufacturing method. 3. The method for manufacturing a diaphragm-inner type steel column according to claim 1, wherein a mark for aligning with the perforated portion is formed on a side edge surface of the diaphragm.