JPS58191849A - Prefabricated steel frame and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to providing a single assembly reinforcing bar and a method for manufacturing the same.

Conventionally, reinforcing steel reinforcement work in reinforced concrete construction required a great deal of labor as each reinforcing bar was manually transported to a predetermined distance fVc and assembled into the required cross-sectional shape.

In recent years, due to labor shortages9 and the aging of workers, various assembly reinforcing bar ends have been proposed for pre-assembling reinforcing bars, automatic assembly, etc., as part of efforts to save labor in reinforcing bar construction. It is like the assembly scissors muscle bolt 1 of the pillar fJt: shown in .

This is done by first fixing both ends A and B of the main reinforcement 2 with a milling jig (not shown), then welding the band grate 3 to both ends to hold the designed i cross section, and then attaching the hoop. The strings or stirrup strings 4 are wound and bound, and the fixed end is released to take out the basket.

However, with such means, the free drawing of the FbT surface shape is greatly restricted by the fixing jigs at both ends.

In addition, since play must be provided in the fixing grips for attaching reinforcing bars, care must be taken to ensure the necessary spacing accuracy of the reinforcing bars when assembling the frame, and since only both ends are fixed, there may be some play in the fixing grips. It may not be possible to ensure sufficient spacing between reinforcing bars, or even worse.

Since the hoop reinforcements or stirrup reinforcements 4 hardly contribute as a shear reinforcing material for the basket 1, which is a three-dimensional frame structure, the basket 1 lacks rigidity and has poor self-sustainability, resulting in problems such as deformation during storage and transportation. can be seen.

The present invention was made in view of the situation on ridges, and its gist is that hoop reinforcement or stirrup reinforcement is used in assembled reinforcing bars as a previous main reinforcement three-dimensional frame structure.For example, in beams, The upper and lower end units facing each other, which are constructed by connecting the main reinforcements of the upper chord and the main reinforcements of the lower chord with fixed spacing re-grate or flat pars, are arranged so that the arrangement interval of the plates or flat pars is one cycle. By connecting flat steel, round steel, or deformed steel bars with a lattice material formed by bending, it is possible to provide sufficient shear resistance rigidity to ensure dimensional accuracy of reinforcing bar spacing over the entire length. There is a certain point.

The details of this will be explained below with reference to the drawings of the embodiments.

- (In other words, Figures 2 a and b are constructed by, for example, connecting the upper chord main reinforcements 5 and 5 and the lower chord side main reinforcements 6 and 6 in a beam with plates or flat pars 7 arranged at regular intervals. However, the relative positions of the 'plates or flat pars 7 in the upper end unit 8 and lower end unit 9 are in a staggered relationship in accordance with the lattice material bonding described later.

Further, Fig. 0 shows a lattice material 10 made by bending and forming a flat steel, round steel, or deformed steel bar with the arrangement interval of the plates or flat pars 7 being one cycle.

4. FIG. 1 shows that the hoop or stirrup crease winding is constructed by welding and joining the bent portions 10a of the lattice material 10 of the upper end unit 8 and the lower end unit 9 to the plate or flat par 74C. The assembled reinforcing bars 11 are shown as a T-bar three-dimensional frame structure.

If additional pressure bars, hoop bars, or stirrup bars are attached to this, it becomes a two-assembly reinforcing bar cage.

According to the present invention, the length of the column and beam Wr surface is the same as the plate or flat par 7 and the lattice material 1.
Since it is determined by 0, its adjustment is simple and flexible.

In addition, if the column/beam width is particularly large, it is sufficient to stiffen it by attaching lattice material lO at two or more places.

An example of this assembled reinforcing bar end 12 is shown in Figure 3.

The present invention configured as described above has various effects as described below.

l) The rigidity of the assembled reinforcing bars is increased by the presence of lattice material, so there will be no deformation or zero when wrapping hoop or stirrup bars, transporting from the factory to the site, and lifting with heavy equipment on site.・No iJ loss occurs.

2) The main reinforcement of the protruding corner can be easily connected to Kozueko in advance.
In combination with the lower end units 8 and 9 and the lattice material 10 that provides an accurate smooth surface, it is possible to ensure the correct position fK over the entire length of the pillar and vermilion, making assembly accuracy easy.
C can be secured.

3) In addition, as an incidental 4J, as a term, the lattice material 1o is effective against intoxication] sword t (because it is effective against pillars and urinary cysts 1k).

I will be able to do it.

[Brief explanation of drawings]

The fx figure is a perspective view of the conventional stone 1 vertical reinforcing bar end, and the tusk 2 figures a to C are the @masu H, Q of the present invention! ii material, d is the @ composition approval 16
A plan view, a perspective view, and an end view of the material assembly. Figure 3 is a perspective view of the Qζ assembly and reinforcing bar cage of the present invention. 5... Main muscle on the side of the superchord, 6... Main muscle on the side of the superchord. 7... Plate or flat par, 8... Upper end unit, 9... Lower end unit, lo... Lattice material. 10a...Bending portion, 11...Assembling reinforcing bar.

Claims (1)

[Claims] +1) In the case of a beam, IZI is a phase structure in which the main reinforcements on the upper chord side and the main reinforcements on the upper chord side are connected by plates or flat bars arranged at regular intervals. A hoop muscle characterized in that the opposing upper and lower end units are connected by a lattice material made by bending and forming flat steel, round steel, or deformed steel bars so that the arrangement interval of the plates or flat bars is one cycle. Or, the stirrup reinforcement is an assembled reinforcing bar as the previous solid red structure. (2) For example, in the case of a beam, the upper chord-side main reinforcements and the upper chord-side main reinforcements are connected by plates arranged at regular intervals, or (above the points where they face each other by connecting them with an e-flat bar. They form the lower end unit.) On the other hand, the lattice material is constructed by bending and forming the flat steel, round steel or deformed steel bar with the arrangement interval of the plates or flat bars being one cycle. Hoop reinforcement or stirrup reinforcement, which is characterized by welding the bent portions of lattice material, is a method for manufacturing assembled reinforcing bars as a main reinforcement-based frame.