JPS594091Y2 - Frame material - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a structural material that can disperse axial force and bending moment and smoothly transmit it to beams and columns. are welded back to back to form a support member 3 such as a bundle member 1 or a cantilever member 2, and one end of the support member 3 is stepped to form a narrow joint end 5.
The mounting end surface 8 of the joint end portion 5 of the support member 3 is connected from the bottom side 7 of the mounting base material 6 formed of a structural material having a substantially U-shaped cross section.
The stepped portion 1 of the joining end portion 5 is attached to the edge 10 of the side 9.
This relates to a frame member in which the joint end portion 5 is welded to the side edge 9 by locking the joint portion 1.

In the case of the conventional bundle-like frame member A, as shown in Fig. 1, the bundle member 1 is simply erected on a plate-shaped bundle fixing plate 12, and the joint ends are welded. Therefore, the load applied to the bundle material 1 is locally concentrated and applied to the bundle fixing plate 12, and as a result, the bundle fixing plate 12 is locally deformed and stress is applied to the beam below the bundle fixing plate 12. This has the disadvantage that the beams are concentrated rather than dispersed, and a beam with greater strength than necessary must be provided.

The soil bundle material 1 and the bundle fixing plate 12 are members of different shapes, and there is a drawback that there are many types of members.

Furthermore, in the case of frame member B such as a cantilever beam as shown in FIG. A large bending moment acts on the joint end 14 of the beam material 2, which tends to deform the end plate 13 having poor cross-sectional properties, resulting in the disadvantage that the end plate 13 is required to be thicker than necessary.

The present invention was made in view of the drawbacks of the conventional example,
The first objective of the present invention is to raise the mounting end surface of a supporting member such as a bundle or beam material above the bottom of the mounting base material, and to lock the stepped portion of the joint end to the side edge. By welding the joint end to the side edge, the load and bending moment applied to the supporting member are dispersed to the side edge, and the support can be held with the minimum thickness of the mounting base material. The second objective is to provide a structural material that can reduce the strength of the beam itself to which it is attached.The second purpose is to use a structural material with a U-shaped cross section as the mounting base material, which is different from the conventional plate-shaped one. In contrast, the purpose is to provide a structural material that improves cross-sectional performance and allows the use of thinner materials.The third objective is to construct the supporting member and the mounting base material from structural materials of the same shape. By doing so, it is an object of the present invention to provide a frame material that can reduce the number of types of members and simplify inventory management.

The present invention will be described in detail below according to illustrated embodiments.

To explain the bundle-like structural material C, it is formed by welding two structural members back to back and having a substantially U-shaped cross section with the side edges 9 erected from both sides of the base 7. The surface shape is approximately ■-shaped, and each has an overlapping portion 15.
and the welding side 16.

An end closing plate 17 is welded to the upper end surface of the bundle material 1.
The mounting hole 18 is threaded.

The lower end of the bundle material 1 is a joint end 5, and the welding sides 16 are stepped inward at the joint end 5, and the joint end 5 is thicker than the upper part. It is narrower by two pieces.

The mounting base material 6 is formed by cutting a structural material of the same shape and size as that of the bundle material 1 into a certain dimension, and is mounted (L18 is screwed) at the end.

However, after placing the mounting base material 6 of the lever on its side, the bundle material 1 is erected approximately at the center of the mounting base material 6, and the welding side edges 16 of the bundle material 1 are placed on both sides 9 of the mounting base material 6. Weld each.

In this case, the step portion 11 of the support member 3 is located at both sides 9 of the mounting base material 6.
A gap 19 is provided between the mounting end face 8 and the bottom side 7 of the mounting base 6.

When the frame member C formed in this way is attached to a beam and a load is applied to the bundle material 1, the entire load applied to the bundle material 1 is distributed to the side edges 9 and becomes loose, and is concentrated on the bottom edge 7. It is something that cannot be added to.

Therefore, the load distributed to the side 9 will be distributed to the beam, and compared to the case where the load is applied concentratedly to the beam, a beam having weaker strength will be sufficient.

In addition, since the U-shaped mounting base material 6 is used, which has a larger section modulus than plate materials such as the bundle fixing plate 12 and the end plate 13, the bending strength of the mounting base material 6 is increased, and therefore a thinner material is used. In addition, since the mounting base material 6 is formed from the structural material that constitutes the bundle material 1 and the cantilever material 2, there is an advantage that the number of types of members can be reduced. .

The same thing can be said for another example of a structural member such as the cantilever beam shown in FIG. Part 5
The welding sides 16 of the
The joint end 5 is welded to the side 9 of a mounting base material 6 of the same shape and size as that formed from the structural material used in the above.

In this case as well, the step 11 of the joint end 5 is attached to the side 9 of the base material 6.
The mounting end face 8 is raised above the bottom side 7.

When the cantilever beam formed in this way is fixed to a column or beam and a load is applied to the cantilever beam material 2, a bending moment will be applied to the joint end 5, but in this case, as in the case described above, It is distributed over the side 9, allowing the mounting base material 6 to be made thinner, and at the same time, there is no need to increase the strength of the pillar or beam to which the cantilever is fixed more than necessary.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a conventional bundle, Fig. 2 is a cross-sectional view of the same as above, Fig. 3 is an explanatory diagram showing the state of stress spread as above, and Fig. 4 is an external perspective view of a conventional cantilever beam. , FIG. 5 is an external perspective view of an embodiment of the bundle of the present invention, FIG. 6 is a front view of the same, and FIG.
The figure is a cross-sectional view of the same as above, FIG. 8 is an explanatory view showing the state of stress spread as above, and FIG. Cantilever beam material, 3 is supporting member,
4 is the side surface, 5 is the joint end, 6 is the mounting base material, 7 is the bottom side, 8
9 is a mounting end surface, 9 is a side edge, 10 is an edge, and 11 is a stepped portion.

Claims (1)

[Scope of utility model registration request] Structural members with a roughly U-shaped cross section are welded back-to-back to form a support member such as a bundle or cantilever beam, and one end of the support member is stepped to form a narrow joint end. The mounting end surface of the joint end of the supporting member is raised above the bottom of the mounting base material formed of a U-shaped structural material, and the stepped part of the joint end is locked to the edge of the side side and joined to the side. A frame material whose ends are welded together.