JPH11172784A - Cross joint structure of brace and method for assembling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cross joint structure of a brace such that a cross joint can be surely welded to the shaft of the brace at a predetermined angle and that the shaft can be given similar functions to a shaft having a buckling stopper and provide a method for assembling the structure. SOLUTION: A brace 10a comprises a stiffening pipe 11 made of a rectangular steel pipe and a shaft 12 made of flat steel, which is inserted into the stiffening pipe 11 and supported on one of the opposite inner corner parts of the stiffening pipe 11 with a gap θ between them. A cross joint 13 comprises a main joint plate 15 having a cut part 14 cut diagonally at about 45 degrees and a pair of split joint plates 16a, 16b. The cut part 14 of the main joint plate 15, with the end 12a of the shaft 12 inserted therein, is diagonally welded to the shaft 12 at about 45 degrees, and the split joint plates 16a, 16b are welded to the main joint plate 15 at about 90 degrees to assemble the cross joint 13. A part 13a of the cross joint 13 is inserted and supported in the stiffening pipe 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brace-shaped cruciform joint structure used for a steel structure such as a building and a method of assembling the same.

[0002]

2. Description of the Related Art A brace material has a simple structure in which a shaft made of flat steel is inserted and supported in a stiffening tube and has excellent energy absorbing ability not only in the tensile direction but also in the compression direction. It has begun to be widely used in middle and low-rise buildings.

As an example, Japanese Patent Application Laid-Open No. 9-221830 discloses a brace material shown in FIGS. 9 and 10.
FIG. 11 discloses a mounting structure of the brace material shown in FIG.

FIG. 9 is a sectional view showing an example of a brace material in which a shaft material is a flat steel and a stiffening material is a square tube. The brace member 1a includes a stiffening tube 2 and a shaft member (also referred to as an axial force member) 3.

The stiffening pipe 2 is formed from a square steel pipe, and gaps α and β are provided in one of the opposite corners of the stiffening pipe 2 to support a shaft member 3 made of flat steel. The shaft member 3 is formed to be longer than the stiffening tube 2, and is attached to a column or a beam using bolts or the like with both ends being joints.

According to the brace member 1a, when a compressive force acts on the shaft member 3, the bending of the shaft member 3 in the direction perpendicular to the material core and the buckling are restrained at the corners of the stiffening tube 2. 3 is prevented from buckling.

FIG. 10 is a cross-sectional view showing another example of a brace material in which a shaft material is flat steel and a stiffener is a square tube. The brace member 1b is composed of a shaft member 3 having a stiffening tube 2 and a buckling stopper 4.

The stiffening pipe 2 is formed of a square steel pipe, and gaps α and β are provided in one of the opposite corners of the stiffening pipe 2, and a shaft member 3 made of flat steel is inserted and supported. A buckling stopper 4 is attached to the shaft member 3 in advance by welding or the like. The buckling stopper 4 is inserted and supported in the stiffening tube 2 integrally with the shaft member 3, and a gap γ is formed in another opposed corner of the stiffening tube 2.
δ. The buckling stopper 4 uses a steel plate or the like to reinforce the shaft member 3.

[0009] As shown in FIG.
The cruciform joint 5 is used for the mounting structure a. Shaft 3 inserted and supported in one opposed corner of stiffening tube 2
Is provided with a slit 3a at the end of the shaft 3 so that the slit 3
The cross joint 5 is inserted into a and welded to each other.

[0010]

However, the technique disclosed in Japanese Patent Laid-Open No. Hei 9-221830 has the following problems.

When the brace member 1a is attached to the attachment portion of a steel structure such as a building using the cruciform joint 5 shown in FIG. 11, the angle between the shaft member 3 and the joint plate forming the cruciform joint 5 is substantially equal.
45 degrees is generally required. In a structure in which a slit 3a is provided at the end of the shaft member 3 and a cross joint 5 is inserted into the slit 3a and welded to each other, the angle is set to approximately 45 degrees. The welding work is complicated, requires high skill and takes time.

On the other hand, a brace material 1b as shown in FIG.
However, it is difficult to use the above-described cross joint 5 as it is as a mounting structure.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a cruciform joint can be securely welded to a shaft member of a brace material at a predetermined angle. It is an object of the present invention to provide a cross joint structure of a brace material capable of imparting the same function as the function of the shaft member to the shaft member, and an assembling method thereof.

[0014]

A first aspect of the present invention provides a brace material having a stiffening tube made of a square steel pipe, a shaft made of flat steel inserted and supported in one of the opposite corners of the stiffening tube, and a cross member. A cruciform joint structure comprising a joint, wherein the cruciform joint includes a main joint plate having a cut portion subjected to oblique processing at approximately 45 degrees, and a pair of split joint plates. Approximately 4
The pair of split joint plates are welded obliquely at 5 degrees, the pair of split joint plates are welded to the main joint plate at approximately 90 degrees, and a part of the cross joint is inserted and supported in the stiffening pipe. It is a cross joint structure of a brace material.

According to a second aspect of the present invention, there is provided a cross joint structure comprising a brace member having a stiffening tube made of a square steel tube, a shaft member made of flat steel inserted and supported at one of the opposite corners in the stiffening tube, and a cross joint. In assembling, the leading end of the shaft member is inserted into a cut portion provided in the main joint plate, the main joint plate is welded obliquely to the shaft member at approximately 45 degrees, and then a split joint is formed on the main joint plate. A method of assembling a cross joint structure of a brace material, characterized in that a plate is welded at approximately 90 degrees to assemble a cross joint, and a part of the cross joint is inserted into the stiffening tube.

According to the method for assembling the cruciform joint structure of the present invention, the main joint plate and the pair of split joint plates constituting the cruciform joint are not sequentially attached to the shaft member by welding, but are sequentially attached. Since the cruciform joint is assembled by welding to the shaft member, reliable welding work can be performed, and the cruciform joint structure of the assembled brace material is securely welded to the shaft member at a predetermined angle.

Further, the amount of welding and the amount of welding can be appropriately adjusted according to the required strength.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view partially cut away showing one embodiment of the present invention, FIG. 2 is a front view taken along line AA of FIG. 1, and FIG. It is sectional drawing by the BB line arrow.

As shown in FIGS. 1, 2 and 3, the brace material 10a is inserted and supported in a stiffening pipe 11 made of a square steel pipe and one opposed corner in the stiffening pipe 11 with a gap θ. And a shaft member 12 made of flat steel.

The cross joint 13, which is a feature of the present invention, is approximately 45
Main joint plate 1 having a cut portion 14 which is obliquely machined
5 and a pair of split joint plates 16a and 16b. The notch 14 of the main joint plate 15 is obliquely welded at approximately 45 degrees to the shaft member 12 by inserting the distal end portion 12a of the shaft member 12 so that the split joint plates 16a and 16b are substantially 90 degrees with the main joint plate 15. And the cross joint 13 is assembled. A part 13 a of the cruciform joint 13 is inserted and supported in the stiffening tube 11. 19 is a welded portion.

FIGS. 4 and 5 show a main joint plate used in the present invention,
It is a top view showing one embodiment of a split joint board.

As shown in FIG. 4, the main joint plate 15 has a cut portion 14 at an end. The cut portion 14 is approximately 45
At an angle to obtain a groove 17a, and when assembling the shaft 1
2 is inserted so that it can be welded obliquely to the shaft member 12 at approximately 45 degrees. 18 is a bolt hole.

Further, as shown in FIG. 5, the pair of split joint plates 16a and 16b are plate-shaped having the same dimensions. To form a groove 17b.

At the time of assembly, the pair of split joint plates 16a and 16b are opposed to each other by the main joint plate 15 which is obliquely welded at approximately 45 degrees to the shaft member 12 as described above. It is welded to the plate 15 at approximately 90 degrees. 18 is a bolt hole.

Next, a method of assembling the cross joint structure of the brace material will be described with reference to FIGS.

FIG. 6 is a view showing a state in which the tip of the shaft is inserted into a cut portion provided in the main joint plate, and FIG.
FIG. 10 is a diagram illustrating a state where a pair of split joint plates are attached to the main joint plate, and FIG. 10 is a diagram illustrating a state where a part of the cross joint is inserted into the stiffening tube.

As shown in FIG. 6, the tip 12 of the shaft 12
a is inserted into the cutout 14 provided in the main joint plate 15. Thereafter, the groove 17a is welded. In welding
Since the side having an angle of about 120 degrees can be welded, reliable welding can be performed. The pair of split joint plates 16a and 16b are in a standby state.

As shown in FIG. 7, the split joint plates 16a,
6b, the front end portion 12a of the shaft 12 is already
The groove 17a is welded to the main joint plate 15 at approximately 90 degrees because the groove 17a is welded to the notch portion 14 provided in the main joint plate 15. Here, for the first time, the main joint plate 15 and the split joint plates 16a, 1
6 is assembled. Here, the welding of the split joint plates 16a and 16b is performed by approximately 90
In addition, even if the groove 17b is formed by obliquely processing one end portion to approximately 45 degrees as necessary and the groove 17b is taken, it is sufficient to similarly weld to the main joint plate 15 at approximately 90 degrees. ,
Reliable welding can be performed.

As shown in FIG. 8, a part of the cross joint 13 assembled as described above is inserted into the stiffening tube 11 to reinforce the shaft member 12. Thereby, the cruciform joint 13 can provide the same function as the function of the shaft member having the buckling prevention as described above.

As shown in the above embodiments, according to the present invention, the completed cross joint is not attached to the shaft member by welding, but the main joint plate and the pair of split joint plates constituting the cross joint Are sequentially attached to the shaft by welding to assemble the cruciform joint, so that reliable welding can be performed. The cruciform joint structure of the assembled brace material ensures that the cruciform joint is welded to the shaft at a predetermined angle. You. In addition, the amount of welding and the amount of welding work can be appropriately adjusted according to the required strength.

[0032]

As described above, according to the present invention, the cross joint is securely welded to the shaft member of the brace material at a predetermined angle.
Further, a function similar to the function of the shaft member having buckling prevention can be imparted to the shaft member.

[Brief description of the drawings]

FIG. 1 is a side view having a notch showing an embodiment of the present invention.

FIG. 2 is a front view taken along line AA of FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a plan view showing an embodiment of a main joint plate used in the present invention.

FIG. 5 is a plan view showing one embodiment of a split joint plate used in the present invention.

FIG. 6 is a view showing a state in which the main joint plate of the present invention is attached to a shaft.

FIG. 7 is a view showing a state in which the split joint plate of the present invention is attached to a shaft.

FIG. 8 is a view showing a state after assembly according to the present invention.

FIG. 9 is a cross-sectional view showing an example of a conventional brace material in which a shaft material is flat steel and a stiffening material is a square tube.

FIG. 10 is a cross-sectional view showing another example of a conventional brace material in which a shaft material is a flat steel and a stiffener is a rectangular tube.

FIG. 11 is a view showing an example of a mounting structure of the shaft member and the joint member of FIG. 9;

[Explanation of symbols]

 10a, 10b Brace material 11 Stiffening tube 12 Shaft material 13 Cross joint 14 Notch 15 Main joint plate 16a, 16b Split joint plate 17a, 17b Groove 18 Bolt hole 19 Welded part

Claims (2)

[Claims] 1. A cross joint structure comprising a brace material having a stiffening tube made of a rectangular steel pipe, a shaft made of flat steel inserted and supported at one of the opposite corners in the stiffening tube, and a cruciform joint. A main joint plate having a cut portion in which the cross joint is obliquely processed at approximately 45 degrees, and a pair of split joint plates, and the tip of the shaft is inserted into the cut portion of the main joint plate. The main joint plate and the main joint plate are welded obliquely at approximately 45 degrees with respect to the shaft, and a part of the cross joint is inserted and supported in the stiffening tube. A cross joint structure made of brace material, characterized in that: 2. Assembling a cross joint structure comprising a bracing member having a stiffening tube made of a square steel tube, a shaft member made of flat steel inserted and supported at one of the opposite corners in the stiffening tube, and a cruciform joint. Then, the leading end of the shaft is inserted into a cutout provided in the main joint plate, and the main joint plate is set to approximately 45
At the same time, and then a split joint plate is attached to the main joint plate by approximately 9
A method of assembling a cross joint structure made of a brace material, wherein the cross joint is assembled by welding at 0 degrees, and a part of the cross joint is inserted into the stiffening tube.