JP2000314277A - Joint structure of metal frame for building - Google Patents

Abstract

(57) [Problem] To provide a joint structure for a building metal frame which is tough and does not use welding means, without causing a gap or misalignment in a joint portion. A long metal frame member having a predetermined cross section is provided with a V-shaped notch portion in the direction of the prospective plane, and a predetermined interval is provided between the notch end faces located on the prospective plane. And a plurality of locking pieces are alternately opposed to each other and integrally protruded, and the metal frame material is bent along the V-shaped notch portion so that the notch end faces come into contact with each other. The leading end side of the engaging piece engaged with each other is bent to form a corner of the frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for a building metal frame which can firmly join the corners of the metal frame with a simple operation.

[0002]

2. Description of the Related Art Conventionally, in order to form an architectural frame, an upper frame or a vertical frame formed in a predetermined cross section is prepared for each member, and the ends of these frame members are cut out to form a frame. Was fixed using welding means after fitting and assembling. In addition, the end of each member was cut into an inclined shape without being fitted and joined in this manner, and the cut surfaces were abutted to each other and welded or fixed with screws using metal fittings such as corner blocks. .

[0003]

However, in the case of the above-mentioned fitting and assembling, a notch die for fitting becomes complicated, and a great deal of labor is required for welding and finishing work. Further, in the case of forming frame corners by abutting frame members that are cut in an inclined shape, not only misalignment due to misalignment of each frame material occurs at a joint portion, but also welding and mounting of metal fittings are required. Was. In addition, in the case of joining with metal fittings or the like, there is a risk that the contact may not be made sufficiently and a gap may be formed in the joined portion, or that sufficient strength against twisting force may not be secured.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and has a predetermined cross-section when joining a building metal frame to form a corner of the frame. The elongated metal frame material is provided with a V-shaped notch portion in the direction of the expected surface, and a plurality of locking pieces are provided at predetermined intervals on the notch end surface located on the expected surface. The metal frame is bent along the V-shaped notch, and the notches are brought into contact with each other so as to abut each other. The corner of the frame is formed by bending the tip end of the piece.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a joint structure for a metal frame for construction according to the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a metal frame attached to an opening. The metal frame 1 includes a gate-shaped three-sided frame 2 and a lower frame 3 including an upper frame 1a and left and right vertical frames 1b, 1b. It is configured.

The three-sided frame 2 is formed by bending a long frame material 5 made of a steel plate or the like to form a frame corner 4.
As shown in FIG. 2, the frame member 5 includes a prospective surface 5a and a finding surface 5 extending at right angles from both ends of the prospective surface 5a.
b, 5b and ribs 5c, 5c, each of which is bent so as to oppose the tip side thereof, are formed in a substantially U-shaped cross section, and the length thereof corresponds to the length of the left and right vertical frames 1b, 1b and the upper frame 1a. In addition to the dimensions, notches 6 and 6 are provided at predetermined positions to form the corners 4 and 4 when the three-sided frame 2 is formed. The notch 6 is shown in FIG.
As shown in the figure, the ribs 5c, 5c are provided on the leading end side in a V-shape when viewed from the finding surface 5b side of the frame member 5 in the direction of the prospective surface 5a, and the leading end angle R is set at a right angle. Have been. That is, the frame member 5 is divided into the left and right vertical frames 1b, 1b and the upper frame 1 by the V-shaped cutouts 6, respectively.
a and is connected in a series by a rib 5c.

Reference numeral 6a designates a plurality of locking pieces integrally and opposed to each other at predetermined intervals alternately from the notch end faces 6b, 6b which are located on the prospective face 5a of the frame member 5 and face each other.
The distance t1 between the locking pieces 6a, 6a is set slightly larger than the width t2 of the opposing locking pieces 6a. FIG. 3 is a perspective view of a cutout main part of the frame member 5.

Next, a case in which the frame corners 4 are joined using the frame material 5 formed as described above will be described with reference to FIG. The upper frame 1a formed with the notch 6 provided in the frame material 5 interposed therebetween is bent at right angles to the vertical frame 1b at the rib 5c at the tip of the V-shaped notch 6 (in the direction of the arrow in FIG. 4A). )
When the two notched end faces 6b, 6b are brought into contact with each other, the notched end faces 6 which are simultaneously located on the prospective face 5a and face each other.
b, 6b, one of a plurality of locking pieces 6a integrally provided at predetermined intervals alternately from one another, and the other locking pieces 6a,
In this state, the engaging portions 6a of the upper frame 1a are engaged with the engaging portions 6a of the upper frame 1a and the engaging portions 6a of the upper frame 1a.
When the front end side is bent toward the expected surface 5a side of the vertical frame 1b, the frame corner 4 is formed as shown in FIG. As a result, the notch end faces 6b, 6b are pressed by the bending at the tip end side of the locking piece 6a, and are joined without forming a gap in the joint.

In the above-described embodiment, the frame corner 4
Has been described as a right angle. However, it is a matter of course that another angle may be set by changing the tip angle of the V-shaped notch 6 when a polygonal frame is formed, for example.

The structure of the metal frame 1 may of course be an L-shaped two-sided frame instead of a three-sided frame. In short, the metal frame 1 may have any shape as long as the corners of the frame are joined as described above.

[0011]

According to the present invention, when forming the corners of the frame, the frame members formed of different members are not joined to each other, so that not only a step difference due to a misalignment at the joint portion does not occur. It is possible to form the corners of the frame simply by engaging the integrally formed locking pieces and bending the tips without using welding means or connection fittings that require skill and labor. improves. Moreover, since the locking pieces are joined and fixed in a meshed state, it is possible to obtain a strong corner of the frame against torsional force.

[Brief description of the drawings]

FIG. 1 is an external view of a metal frame.

FIG. 2A is a top view of a frame material. (B)
It is a side view of (A). (C) is a plan view of (A).

FIG. 3 is a perspective view of a main part showing a cutout portion of FIG. 2;

FIG. 4A is an operation state view of forming a corner of a frame. (B) is a joining state diagram of a frame corner.

FIG. 5 is an external perspective view of a corner of the frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal frame 1a Upper frame 1b Vertical frame 2 Three-sided frame 3 Lower frame 4 Frame corner 5 Frame material 5a Finding surface 5b Expected surface 5c Rib 6 Notch 6a Locking piece 6b Notch end surface

Claims (1)

[Claims] 1. A long metal frame member having a predetermined cross section is provided with a V-shaped notch portion in the direction of the prospective plane, and a predetermined distance is provided between the notch end faces located on the prospective plane. A plurality of locking pieces are alternately opposed to each other and integrally protruded, and the metal frame material is bent along the V-shaped notch portion so that the notch end faces contact each other. A joint structure for a building metal frame, wherein a corner of the frame is formed by bending a tip end of the engaging piece that is in contact with and meshes with each other.