JPH0544260A - Metal fittings for steel pipe column/beam connection - Google Patents

Abstract

PURPOSE:To enable a steel pipe column to be prevented from being deformed when the column and beams are fastened with a long fastening bolt or the like for jointing them to each other, and according to the other external force, and enable them to be easily arranged according to the change of a steel pipe diameter, a screw position, and the like, and enhance rigidity, by arranging devices inside the steel pipe column. CONSTITUTION:In the direction orthogonal from the surface of a substrate 7 provided with a bolt hole 11 or a tap screw hole 15 to be brought in contact with the inside of a steel pipe column 1, joint pieces 8 are integrally projected to be pectinated at small intervals. Connection metal fittings 6a, 6b for forming a loose hole 9 to be penetrated with a bolt 10 in the direction orthogonal to the joint pieces 8 are connected to each other by fitting the joint pieces 8 on each other and by inserting the bolt 10 to be fastened through the loose hole 9. Then, a straight body 13 to be placed inside the steel pipe column 1 in a steel pipe column/beam jointing section is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal fitting for joining a steel pipe column and a steel beam in the field of civil engineering, construction or bridges,
That is, it relates to a fitting.

[0002]

2. Description of the Related Art Joining a joint between a steel pipe column and a steel beam is carried out by means of bolt joining except welding. In such a bolt joint, a metal fitting with tapped screw holes, etc. is provided inside the steel pipe in advance so that the inside of the steel pipe pillar cannot be reached when tightening the bolt, or only the joint part is made of a special metal object. Various proposals have been made.

FIG. 4 shows an example in which only the bolts from the outside need to be tightened. In the figure, 1 is a steel pipe column.
Reference numeral 2 is a beam made of H-shaped steel frame. A T-shaped joint metal 3 is attached to the upper and lower flanges 2a of the beam 2 by welding, and the T-shaped joint metal 3 is brought into contact with the outer peripheral surface of the steel pipe column 1 to form a steel pipe. The joint between the T-shaped metal fitting 3 and the steel pipe pillar 1 is tightened with a long tightening bolt 4 that penetrates the pillar 1.

[0004]

However, in the long tightening bolt system shown in FIG. 4, a large axial force is introduced during tightening, and a large axial force is generated only by the steel pipe column 1 having nothing inside. There is a risk that the shaft will not be able to withstand and be deformed, and that axial force cannot be introduced. On the other hand, when filling the inside of the steel tube column 1 with concrete, if this concrete hardens, the above-mentioned problem will be solved, but tightening will be waited until hardening, and it will take two steps of temporary tightening and final tightening. Is required.

Further, in addition to tightening with the long tightening bolt 4, a metal having a tap screw hole inside the steel pipe column 1 corresponding to the T-shaped joint metal 3 is set in advance as a backing material in a joint portion and is in a tap screw type. There is also a method of tightening, but even in this case, there is nothing inside the steel tube column 1 and the steel tube column 1 is deformed when a force from the beam is received.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, and to prevent the deformation of the steel pipe column even when tightening with a long tightening bolt or the like at the joint between the steel pipe column and the beam or when receiving other external force. An object of the present invention is to provide a steel pipe column / beam connector fitting that can be reliably prevented and is easy to dispose.

[0007]

According to the present invention, in order to achieve the above object, a joining piece is formed in a direction orthogonal to the surface of a substrate provided with a bolt hole or a tapped screw hole for abutting the inside of a steel pipe column. Tooth-like projections are integrally formed at small intervals, and the joint pieces are meshed with each other, and the joint pieces are engaged with each other by forming loose holes through which bolts penetrate in the orthogonal direction in this joint piece, and then insert the bolts into the loose holes. By tightening the
The gist of the invention is to form a straight body interposed between the beam joints inside the steel pipe column.

[0008]

According to the present invention, the joint pieces of the metal fittings are alternately positioned and meshed with each other, and the meshes are tightened in the orthogonal direction by bolts. More than 90% of axial force can be transmitted. Further, since each joining piece is subdivided into a comb tooth-like shape as small as possible, the cross-section axial yield strength of each joining piece is smaller than the frictional force. That is, when each joint piece is given a frictional force by bolts, its cross-sectional proof strength can be exerted 100%, and it is difficult to separate the fittings from each other like two books are entwined and combined. Become.

Then, a straight body is formed by combining the metal fittings, and the straight body is disposed as a backing material and an external force resistance material inside the steel pipe pillar between the steel pipe pillar / beam joint. This reinforces the steel tube column from the inside and prevents deformation of the steel tube column.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional plan view showing a usage state of a steel pipe column / beam connection metal fitting of the present invention, FIG. 2 is a longitudinal side view of the same, and the same components as those of FIG. is doing.

The metal fittings 6a, 6 used in the present invention
Explaining b, as shown in FIG.
a is a joining piece 8 in a direction orthogonal to the plane of the substrate 7 of the vertical plate.
Are protruded integrally in a comb-like shape at a small interval, and loose holes 9 through which bolts penetrate in the orthogonal direction are formed in the joint pieces 8. This substrate 7 has a flat joining surface 12 on one side to engage with the inside of the steel pipe column 1, and the joining piece 8 is provided on the surface opposite to the joining surface 12 so that the joining piece 8 is assembled. The root part to be formed has a thick haunch shape.

Further, the interval between the joining pieces 8 projecting from the surface of the substrate 7 is such a width that the joining piece 8 from the other metal fitting 6b can be inserted therebetween, and the loose hole 9 provided in the joining piece 8 is As shown in FIG. 1, it becomes a loose hole for the bolt 10 (high-strength bolt) that penetrates it, and in addition to the notched hole opened at the tip as shown in FIG. Good.

The metal fitting 6b has substantially the same shape as the metal fitting 6a, and a plurality of joint pieces 8 are integrally projected from the same surface of the substrate 7 in the shape of comb teeth at small intervals. The joint piece 8 is formed with a loose hole 9 through which the bolt penetrates in the orthogonal direction.
The interval between the joining pieces 8 projecting from the substrate 7 is such that the joining piece 8 from the other metal fitting 6a can be inserted between them.

Both the metal fittings 6a and 6b are provided with bolt holes 11 or tap screw holes 15 (see FIG. 2) near the corners of the substrate 7. In the case of the bolt hole 11, it penetrates through the base portion 7 in the thickness direction, and in the case of the tap screw hole 15, it enters from the joint surface 12 to the inside and stops on the way.

The fitting 6a and the fitting 6b
Are joined to each other by engaging the joining pieces 8 with each other, inserting the bolts 10 into the loose holes 9 and tightening the bolts 10 to connect them to each other.
The entire length of the straight body 13 is the engagement length α of the joining pieces 8 of the metal fitting 6a and the metal fitting 6b.
Can be adjusted so as to match the inner diameter of the steel pipe column 1, and the steel pipe column 1 is attached to the inside of the steel pipe column 1 in advance as a backing material in the factory.

In this way, the upper and lower flanges 2 of the beam 2 are
When the T-shaped joint metal 3 attached to the end a by welding is brought into contact with the outer peripheral surface of the steel pipe column 1, and the T-shaped joint metal 3 and the steel pipe column 1 are tightened with a long-tightening bolt 4 that penetrates the steel pipe column 1, This long tightening bolt 4 is used as a fitting metal fitting 6a and a fitting metal fitting 6b.
The bolt holes 11 of the base plate 7 are penetrated so that the straight body 13 is disposed inside the steel pipe column 1 and between the T-shaped metal fittings 3.

As another example of use, the high-strength bolts 14 are tightened while sandwiching the steel pipe pillar 1 between the T-shaped joint metal 3 and the base plate 7 of the metal fitting 6a and the metal fitting 6b in front and back. You can In this case, the high-strength bolt 14 is the substrate 7
Insert into tap screw hole 15 of.

Further, in the case where the beam 2 is joined to the steel pipe column 1 in the four directions orthogonal to each other as shown in FIG.
Also, the rectangular parallelepiped body 13 formed by connecting the connection metal fittings 6b vertically intersects in the steel pipe column 1, but the tightening of the joint pieces 8 of the connection metal fittings 6a and the connection metal fittings 6b with the bolts 10 is shown in FIG. As shown in the lower part of FIG. 2, it is also possible to collectively form the orthogonal straight bodies 13 with one bolt 10.

In the straight body 13, the joint metal pieces 6a and the joint metal pieces 6b are meshed with each other with the joining pieces 8 alternately positioned, and this meshing is tightened by the bolts 10 in the orthogonal direction. , Each joint piece 8 has two-sided friction, so that the axial force of the bolt 10
90% or more can be transmitted, and since each joining piece 8 is subdivided into the teeth of a comb as small as possible, each joining piece 8
The axial proof stress of each of the
When the frictional force is given by the bolt,
%, It becomes difficult to separate the two books by tying the pages together to form a rigid straight body.

By interposing this rigid straight body 13 between the T-shaped metal fittings 3 at the ends of the upper and lower flanges 2a of the beam 2 inside the steel pipe pillar 1, the steel pipe pillar 1 is tightened with the long tightening bolts 4. It does not deform even if it receives force or other external force from the beam 2. Also, when the steel pipe pillar 1 is filled with concrete, the space can be sufficiently secured.

[0021]

As described above, the steel pipe column / beam connector metal fitting of the present invention is arranged inside the steel pipe column so that it can be tightened with long-tightening bolts or the like for joining the column / beam and the like. It is possible to prevent the deformation of the steel pipe column in response to the external force, and to easily dispose the steel pipe column in response to changes in the diameter of the steel pipe, the screw position, and the like, and the rigidity is high.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a column / beam joint showing a usage state of a steel pipe column / beam connection metal fitting of the present invention.

FIG. 2 is a vertical cross-sectional side view of a column / beam joint showing a usage state of the steel pipe column / beam connection metal fitting of the present invention.

FIG. 3 is a perspective view showing one embodiment of a steel pipe column / beam connector metal fitting of the present invention.

FIG. 4 is a cross-sectional plan view of a column / beam joint showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel pipe column 2 ... Beam 2a ... Flange 3 ... T-joint metal fitting 4 ... Long tightening bolt 6a, 6b ... Connection metal fitting 7 ... Board 8 ... Joining piece 9 ... Loose hole 10 ... Bolt 11 ... Bolt hole 12 ... Joining Surface 13 ... Straight body 14 ... High-strength bolt 15 ... Tap screw hole

Claims (2)

[Claims] 1. A joining piece is integrally projected at a small interval in the shape of a comb tooth in a direction orthogonal to the surface of a substrate provided with a bolt hole or a tap screw hole for abutting the inside of a steel pipe column. A steel pipe column / beam connection fitting, characterized in that a loose hole through which a bolt penetrates is formed in the joining piece in the orthogonal direction. 2. A joint piece is integrally projected at a small interval in the shape of a comb tooth in a direction orthogonal to the surface of a substrate provided with a bolt hole or a tap screw hole for abutting the inside of a steel pipe column. The joint pieces are meshed with each other, and the joint metal pieces are formed with loose holes through which bolts penetrate in the orthogonal direction in the joint pieces.
A steel pipe column / beam connector fitting, characterized by forming a straight body to be interposed inside the steel pipe column / beam joint between the steel pipe column / beam joints by inserting bolts into the loose holes and tightening.