JP2008506055A - Steel bar with octagonal core for ordinary construction - Google Patents

Abstract

The purpose of this patent is for normal construction, especially because it prevents polygons generated during hanger (4) folding from generating non-coplanar edges in their manufacturing process, which results in significant savings in the process, The state of the art in the steel bar (2) manufacturing technology for the purpose of bending for the production of hangers (4) for reinforced structures. The formation of hangers (4) with non-coplanar edges brings cost and delay to normal construction, which can be avoided by the use of steel bars with a regular construction octagonal core, the purpose of this patent. The core of a steel bar with an octagonal core dedicated to ordinary construction is octagonal as shown in Fig. 8, but its intrinsic cross section is an octagonal structure formed by a corrugated material from which steel bar (2) is made as shown in Fig. 9. is there.

Description

  Since ordinary construction has adopted reinforced concrete technology, column production is a manual process, and vertical boxes are erected with suitable long steel bars inside them; these boxes are water, sand, which constitutes so-called concrete And filled with cement mixed with crushed stone.

1, 2, and 3 illustrate this process and its stages.
The first stage of the process can be seen in FIG. 1, in which the steel bars (2) are placed vertically on some support base (12) and are kept in place by their own rigidity, or they are made of wire (3 ).

In FIG. 2, the steel bar is held in place by a hanger (4), usually according to the structural plan, but this can be any number, and these are also made of the same steel as the steel bar, and either welding or wire binding It is fixed to the steel bar.
FIG. 3 is a general front view of a pillar (5) under construction, and at this stage it is wrapped in a wooden mold (6), whose front is omitted to expose the interior of the pillar, they are Once the concrete placed in is hardened, it is removed.
The hangers (4) usually have dimensions smaller than that of the main rebar, and they are seen from the top according to FIG. 4, where they are obtained by cutting and bending themselves with suitable dimensions and shapes of rectangles; However, it can be other polygonal shapes such as squares, triangles, hexagons etc.
The raw materials offered by the market used as steel bars usually have a natural cross section (7) called round core bar as shown in FIG. 5 and a natural surface (8) known as corrugated surface as shown in FIG. . These inherent shapes and surfaces are intended to increase the contact surface and adhesion of concrete and steel bars (2) and hangers (4) and increase the overall resistance.
However, when the steel bar (2) is bent to make the hanger (4), due to the inherent cross-section of the material, the formed polygon (9) is deformed at an angle different from those expected for the natural shape of the round core. Therefore, the edges are not held in the same plane as shown in FIG. Such a situation increases the cost and lengthens the construction period because two workers are usually required to bind the steel bars with wires so as to have edges on the same plane again.

Advances in the technical state contemplated by this patent

  Due to the octagonal shape of its core, the purpose of this patent "bars with a regular construction octagonal core" does not form an angle that causes the hanger to have an edge in a clear plane when folded manually or industrially To.

Illustration and description of this patent

FIG. 8 shows the octagonal shape (10) of “bars with octagon cores for ordinary construction” (1), and FIG. 9 shows its natural cross section (11) derived from its natural wave surface.
Figure 10 shows the system of force applied when manually and industrially bending steel bars from various cross-sectional shapes: Steel bar (2) is positioned in the correct position on the folding bolt by fasteners (12) and (12A) At this point it is folded by the action of force (14).

  FIG. 11 shows the results obtained in a front view; the expected results are those of a straight line defined by the point ABD, but in practice a fold distributed statistically at angles formed by the straight lines ABC and ABE. And in the formation of the square hanger (4), four random dispersions like these are added, so that the hanger (4) does not become coplanar in the course as indicated.

  The reason for this is clear: when bending a disk-shaped steel bar (2), the resistance against the bending force is the same in all directions due to the uniformity of the diameter; Due to the parallelism of the opposite sides of the square, the steel bar is firmly positioned correctly on the bending bolt (13) by the fixtures (12) and (12A) according to FIG. .. The area of I is smaller than F ... G corresponding to the diagonal line, and is therefore the area having the smallest resistance to the acting force, and that the folding occurs efficiently, with the result that the coplanar hanger ( 4) is possible.

Explanation of symbols

1: Steel bar with octagonal core for ordinary construction 2: Steel bar 3: Wire 4: Hanger 5: Pillar 6: Wooden mold 7, 11: Inherent cross section 8: Inherent surface 9: Polygon 10: Octagonal shape 12, 12A: Support base (fixture)
13: Bending bolt 14: Force

Claims (1)

Bending to form a hanger (4) having an octagonal shape (10) and a core with its intrinsic cross section due to the octagonal structure as a result of the surface formed by the corrugated material from which the steel bar (2) is made “Steel with an octagonal core for ordinary construction” characterized by forming a polygon on the same plane when it is involved in the process.

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