JP-2026075266-A - Metal fittings for connecting hollow rectangular pipes in construction.

Abstract

[Problem] To provide a lightweight and high-strength metal joint that can easily fasten multiple hollow rectangular pipes made of metal such as aluminum or steel together using only screw fastening, a support structure using the joint, and a steel frame structure in which multiple support structures are connected by purlins. [Solution] The metal joint 10 comprises a metal core material 11 having opposing planes and a reinforcing material 12 fixed to the core material 11 so as to cover at least two opposing surfaces of the core material 11, and the width of the joint 10 in two orthogonal directions is loosely fitted with a minute gap between it and the inner diameter of the hollow rectangular metal pipe 15 to be connected. [Selection Diagram] Figure 1

Inventors

• 佐々木 純一
• 須田 高史
• 高田 豊

Assignees

• 群馬県
• 株式会社 国定電機

Dates

Publication Date

20260508

Application Date

20241022

Claims (6)

1. A joint that fits into the internal space of a hollow rectangular metal tube and connects the hollow rectangular metal tubes together, comprising a metal core material having opposing planes, A metal reinforcing material fixed to the core material so as to cover at least two of the opposing surfaces of the core material, A metal fitting characterized by having the following features.
2. The metal joint according to claim 1, characterized in that the core material is a hollow rectangular steel pipe having at least one rectangular or square cross-section, or a combination thereof.
3. The reinforcing material is a plate-shaped reinforcing plate, and the joint formed by fixing the reinforcing plate to the core material is such that its width in two orthogonal directions is loosely fitted to the inner diameter of the hollow rectangular metal pipe to be connected, and the joint is fastened to the hollow rectangular metal pipe to be connected by screws, as described in claim 1 or 2.
4. A T-shaped, Π-shaped, or L-shaped metal joint comprising a metal core having opposing planes, and a metal reinforcing member fixed to the core so as to cover at least two of the opposing surfaces of the core, The joint includes at least one hollow rectangular metal pipe horizontally connected to it, A column pipe of a hollow rectangular metal pipe, at least one end of which is connected vertically to the T-shaped, Π-shaped, or L-shaped metal joint so as to be perpendicular to the crossbeam pipe, A RC foundation with a shaft, which is provided to connect to the other end of the column pipe and whose shaft is precast from reinforced concrete, A support structure equipped with a column.
5. The support structure according to claim 4, characterized in that the reinforcing material is a plate-shaped reinforcing plate, and the two opposing surfaces of the core material of the T-shaped, Π-shaped, or L-shaped metal joint face each other in directions perpendicular to the axis perpendicular to the ground.
6. A steel frame structure comprising a plurality of support structures as described in claim 4 or claim 5, and connecting the support structures with a plurality of purlins.

Description

This invention relates to a metal joint for connecting multiple hollow rectangular pipes to each other, a support structure in which beams, columns, and foundations of hollow rectangular pipes are connected using the metal joint, and a steel frame structure formed by connecting multiple such support structures with purlins. Traditionally, when connecting beams (such as H-shaped or I-shaped steel beams) or columns to beams in steel frame structures, methods such as butt welding or screw fastening using auxiliary plates were common. However, in recent years, particularly in lightweight structures like carports, the mainstream method has become welding or screw fastening using hollow rectangular metal tubes made of aluminum or steel. A known method for connecting the hollow rectangular pipes described above involves utilizing the internal space of the pipes and connecting them using joints or metal fittings. Patent Document 1 shows an example of screwing/welding rectangular steel pipe columns 1a and 1b via a joint 2, while Patent Document 2 shows inserting hollow rectangular vertical beam pipes 5 and horizontal beam pipes 6 into the hollow rectangular support pipes 7 and 8 of a metal L-shaped joint 12 and joining them by welding or adhesive. Furthermore, Patent Document 3 shows that, in order to connect multiple hollow metal columnar members 1, the outer surface of a metal connecting jig 2, which is composed of multiple square pipes 21, is inserted into the hollow interior of the metal columnar members 1 and fixed with adhesive. Japanese Patent Application Publication No. 7-317153European Patent Application Publication No. 01916349Japanese Patent Publication No. 2016-183538 This is a perspective view showing a first embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.Figure 1 shows a configuration in which metal hollow rectangular pipes are connected using the metal fittings shown in Figure 1. (a) is an overall perspective view, and (b) is an exploded perspective view.This is a cross-sectional view taken along the line A-A in Figure 2.This is a detailed view of section B in Figure 2.This is a perspective view showing a second embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.Figure 5 shows a configuration in which hollow metal rectangular pipes are connected using the metal fittings shown in Figure 5.This is a cross-sectional view taken along the line C-C in Figure 6.This figure shows a modified example of a second embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view.This is a perspective view showing a third embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.This is a cross-sectional view taken along the line D-D in Figure 9.This is a perspective view showing a fourth embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.This is a cross-sectional view taken along the line E-E in Figure 11.This is a perspective view showing a fifth embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.This is a cross-sectional view taken along the line F-F in Figure 13.This is a perspective view showing a sixth embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.Figure 15 shows a configuration in which hollow metal rectangular pipes are connected using the metal fittings shown in Figure 15.This is a cross-sectional view taken along the line G-G in Figure 16.This is a perspective view showing a seventh embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.This figure shows the state in which metal hollow rectangular pipes are connected using the metal fittings shown in Figure 18.This is a cross-sectional view taken along the line H-H in Figure 19.This is a perspective view showing an eighth embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.Figure 21 shows a configuration in which hollow metal rectangular pipes are connected perpendicularly in a T-shape using the metal fittings shown in Figure 21. (a) is an overall perspective view, and (b) is an exploded perspective view thereof.This is a perspective view showing a ninth embodiment of the metal joint of the present invention, where (a) is an overall perspective view and (b) is an exploded perspective view thereof.Figure 23 shows a configuration in which hollow metal