JPH0620812Y2 - Opening reinforcement - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an opening reinforcing bar of a reinforced concrete or a steel reinforced concrete structure.

"Problems to be Solved by Conventional Techniques and Inventions" In a reinforced concrete or steel-framed reinforced concrete structure, as shown in FIG. 4, an outer wall 1 of a frame is provided with openings 2 for entrances, windows, and the like.

In this case, in order to reinforce the opening, a vertical reinforcing bar 3 and a horizontal reinforcing bar 4 are usually arranged around the opening, and a corner reinforcing means such as a diagonal reinforcing bar 5 is provided at the corner. . Hereinafter, a conventional construction example will be specifically described.

(1) In the case of diagonal reinforcing bars In FIGS. 5 and 6, together with FIG. 4, vertical reinforcing bars 3 and horizontal reinforcing bars 4 are arranged around the opening 2, and diagonal reinforcing bars 5 are provided at the corners. Is shown.

In this case, the vertical reinforcing bar 3 and the horizontal reinforcing bar 4 are bound together by welding or numbering at the ends of the inner and outer wall reinforcing bars 6, 6 assembled in a grid pattern, and the wall reinforcing bars 6, 6 are diagonally connected to each other. Reinforcing bars 5 are bound by welding or numbered wires, respectively.

(2) Parallel vertical / horizontal reinforcing bars FIG. 7 and FIG. 8 show two vertical reinforcing bars 3 and 3 and horizontal reinforcing bars 4 and 4 arranged around the opening 2 in parallel. Is shown.

These vertical / horizontal reinforcing bars 3, 3, 4, 4 are welded or tied to the ends of the inner and outer wall reinforcing bars 6, 6 assembled in a grid pattern. 7 is the cast concrete.

(3) Welded wire mesh part 1 In addition to the case of the above-mentioned parallel lines and horizontal reinforcing bars,
The case where the reinforcing wire netting 8 by rectangular welding is diagonally arranged in the corner portion is shown.

The reinforcing wire netting 8 is welded or bundled to the opposite surfaces of the inner and outer wall reinforcements 6 and 6 assembled in a grid pattern. 7
Is cast concrete.

Part 2. 11 and 12 show the above 1. In this case, the reinforcing wire mesh 8 is formed in an L shape so as to fit the corner portion.

(4) Reinforcing bar processing reinforcement product Fig. 13 shows the case where the vertical reinforcing bar 3 and the horizontal reinforcing bar 4 are arranged around the opening 2, and the reinforcing bar processed reinforcing product 9 is arranged in the corner portion. ing.

Although not shown, the vertical reinforcing bar 3 and the horizontal reinforcing bar 4 are bound to the ends of the inner and outer wall reinforcing bars 6, 6 assembled in a grid shape by welding or numbering, respectively. 6 and 6 are welded or tied together on the opposite surfaces to each other. 7 is the cast concrete.

However, in the case of the above-mentioned diagonal reinforcing bar, in the case of a welded wire mesh and in the case of a reinforcing bar processed reinforcing product, the oblique reinforcing bar 5, the reinforcing wire mesh 8, and the reinforcing bar processed reinforcing product 9 are superposed on the vertical bars and horizontal bars of the wall bars 6 and 6. Therefore, it is inevitable that the number of stacked reinforcing bars in the corner portion is inevitably multi, and the reinforcing bars are insufficiently lit or the concrete covering thickness is insufficient. Therefore, the surroundings of the concrete 7 become poor, and a bean board and a jumper are easily formed, and there is a drawback that the reinforcement cannot be completed completely.

Further, in the case of parallel vertical / horizontal reinforcing bars, cracks that enter diagonally at the corners cannot be sufficiently dealt with, and in the case of reinforcing bar processed reinforcing products, the processing of the reinforcing bar processed reinforcing products 9 is complicated and there are many welding points, which is troublesome. It takes too much, resulting in high cost, and if the pressure contact portion just hits the wall stirrup 6.6, the shortage of concrete covering thickness becomes remarkable.

By the way, among the published utility model application publications, there is JP-A-55-107503, which relates to a reinforcing structure for a concrete opening. This reinforcing structure has a circular or nearly circular spiral arc portion in the central portion, and a reinforcing bar having linear portions on both end sides is provided at the corner of the opening corner of the concrete and the center of the arc portion. Are substantially matched with each other, and the linear portion is embedded in a state in which the linear portion is positioned substantially parallel or oblique to the side of the opening.

However, this reinforcement is embedded along the wall separately from the wall, and since it crosses and overlaps between the arc part and the straight part, the insufficient covering thickness of concrete becomes more serious. , The crack due to this is unavoidable.

Furthermore, since the circular or nearly circular spiral arc portion is located at the corner of the opening of the concrete, if tensile force is applied to the linear portions at both ends, the center of the arc will be inside the spiral arc portion. On the contrary, when a compressive force is applied to the linear parts on both ends, this force acts to spread the ring on the spiral arc part and pushes it against the surrounding concrete in the direction to open it. The force is applied, which in turn promotes the crack.
Therefore, the effect of preventing cracks at the corners of the opening cannot be expected so much.

The present invention has been made in consideration of the above-mentioned conventional problems, and appropriately removes the conventional defects, and prevents cracks in the opening corners, increases shear strength, improves construction accuracy and reinforcement effect, It is intended to reduce the cost.

"Means for Solving Problems" In the present invention, as shown in FIGS. 1 to 3, a vertical reinforcing bar 3 and a horizontal reinforcing bar 4 which are located around the opening 2 are respectively attached to the wall reinforcing bars 6. Is arranged in the same bar arrangement surface, is joined to the end of the wall reinforcement 6, and one end of the vertical reinforcement 3 and the horizontal reinforcement 4 is located at the corner portion of the opening. In the same bar arrangement surface, the bent portion a is bent toward the opening 2 side to form a moderately inclined bent portion a. Further, the reinforcing bar is bent into a trapezoidal shape and the abutting end portion is welded b. A loop-type slanting reinforcing bar 10 is provided, and the loop-type slanting reinforcing bar 10 is provided along the opening corner portion on the side opposite to the opening 2 of the bent portion a and forms the bent portion a. And located in the same reinforcing plane as the wall reinforcement 6, and the middle portion of the loop-type diagonal reinforcing reinforcement 10 and its bent portion a
It is characterized in that the appropriate places are bound by a band plate 11 and that each part of the loop-type diagonal reinforcing bar 10 is properly connected to the wall bar 6.

In addition, in FIG. 1 thru | or FIG. 3, 7 is the wall concrete poured.

"Operation" As described above, the external force acting on the lateral reinforcing bar 4 (or the vertical reinforcing bar 3) having the bent portion a formed at the opening corner portion balances the band plate 11 at the bent portion a. Balanced as a reaction force.

Then, the vertical reinforcing bar 3 and the horizontal reinforcing bar 4 reinforce the periphery of the opening 2, and even if a large external force is applied to the corner portion of the opening, the loop-type diagonal reinforcing bar 10 properly restrains the concrete 7 inside the loop. Then, the crack of the concrete 7 in the corner portion of the opening is prevented. That is, even if a tensile force is applied to the loop type diagonal reinforcing bar 10, the compression reaction force of the concrete 7 outside the loop opposes this and prevents the loop from spreading,
The restraint of the concrete 7 inside the loop is maintained by the loop type diagonal reinforcing bar 10. In addition, these reinforcing bars enhance the shear strength of each part and achieve the intended purpose.

"Embodiment" FIGS. 1 to 3 show an embodiment of the present invention. In the above-described structure of the present invention, the inner and outer wall reinforcements in which the vertical reinforcements 3 and the horizontal reinforcements 4 are assembled in a lattice pattern. The ends of 6 and 6 are bundled by welding or numbered wires, and a bent portion a is formed in the corner portion of the horizontal reinforcing bar 4 by obliquely bending, and the loop-type diagonal reinforcing bar 10 is formed in a trapezoidal shape. The loop-type diagonal reinforcing bar 10 is formed by bending a reinforcing bar having a cross-sectional area of at least 1/2 or more of that of the conventional diagonal reinforcing bar, and welding the abutting ends thereof.

Further, the band plate 11 is formed in a loop shape in advance, and the loop type diagonal reinforcing bar 10 assembled with the bent portion a is formed.
Fit in and.

At the end, the loop-type diagonal reinforcing bar 10 is bound to the proper places of the wall bars 6 and 6 and the end of the bent portion a by the number lines 12.

As a result, the number of stacking bars is two.

[Advantage of Invention] According to the present invention, the vertical reinforcing bar 3 and the horizontal reinforcing bar 4 located around the opening 2 are arranged in the same reinforcing plane as the wall reinforcing bar 6, and the wall reinforcing bar 6 is formed. Since the vertical reinforcing bar 3 and the horizontal reinforcing bar 4 can be provided in the rebar layer common to the wall reinforcing bar 6, the reinforcing bar is bent into a trapezoidal shape as appropriate and the butt ends are joined together. A loop-type diagonal reinforcing bar 10 formed by welding b parts is provided at a corner portion of the opening with longitudinal reinforcing bar 3 or lateral reinforcing bar 4 and wall reinforcing bar 6
Since it is located in the same bar arrangement plane, the loop type diagonal reinforcing bar 10 can also be provided in the bar reinforcing layer common to the wall bar 6,
All the reinforcing bars 3, 4 and 10 can be accommodated within one layer of the wall reinforcing bars 6, and therefore the number of stacked reinforcing bars does not increase, which does not cause insufficient lighting of reinforcing bars or insufficient covering of concrete, and concrete Sufficient reinforcement can be obtained without making the circumference of 7 worse and making it easy to form plywood and junkers.

Thus, the loop-type diagonal reinforcing bar 10 is obtained by bending a reinforcing bar into a trapezoidal shape and welding the abutting ends together, and the loop-type diagonal reinforcing bar 10 is the same at the opening corner portion. The loop type diagonal reinforcing bar 10 can be formed along the anti-opening 2 side of the bent portion a of the vertical reinforcing bar 3 or the horizontal reinforcing bar 4 that is appropriately bent to the opening 2 side in the bar arrangement surface. Middle part and its bent part a
The band-shaped plate 11 is used to bind the appropriate places with the band-shaped plate, and the respective parts of the loop-type diagonal reinforcing bar 10 are appropriately joined to the wall bar 6, so that the loop-type diagonal reinforcing bar 10 forms a loop at the opening corner. The concrete 7 inside can be restrained appropriately, and even if a tensile force is applied to the loop-type diagonal reinforcing bar 10, the compression reaction force of the concrete 7 outside the loop opposes this to spread the loop. The concrete 7 inside the loop can be restrained without being hindered, and therefore, even if a large external force is applied to the opening corner portion, the concrete 7 can be reliably prevented from cracking at the opening corner portion.

Further, the vertical reinforcing bar 3, the lateral reinforcing bar 4, and the loop-type diagonal reinforcing bar
10 is integrated with the wall reinforcement 6 to strongly reinforce the required portion and increase the shear strength.

Moreover, the loop-type diagonal reinforcing bar 10 can be manufactured in a uniform factory, which can improve the accuracy and quality of the bar arrangement, and can increase the anchoring effect, shorten the reinforcing bar length, and increase the reinforcing bar length. The amount can be reduced, the processing can be simplified, the welding points can be reduced, the labor can be reduced, the workability can be improved, and the cost can be reduced.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a sectional front view, FIG. 2 is a sectional side view, FIG. 3 is a sectional view of a main part, and FIGS. FIG. 4 is a conventional example, FIG. 4 is an explanatory view of the first example, FIG. 5 is a sectional front view of the same example, FIG. 6 is a sectional side view of the same example, and FIG. Example cutaway front view, 8th
FIG. 9 is a sectional side view of the same example, FIG. 9 is a sectional front view of the third example, FIG. 10 is a sectional side view of the same example, and FIG. 11 is a sectional front view of the fourth example. Figure is a cutaway side view of the same example, and Figure 13 is
It is a cutting | disconnection front view of a 5th example. 1 ... Outer wall, 2 ... Aperture 3 ... Vertical reinforcement, 4 ... Horizontal reinforcement 5 ... Diagonal reinforcement, 6 ... Wall reinforcement 7 ... Casting concrete 8 ... Reinforcing wire mesh 9 ... Reinforcing bar Processed and reinforced product 10 …… Loop type diagonal reinforcing bar 11 …… Band plate, 12 …… No. Line a …… Bent, b …… Welding

Claims (1)

[Scope of utility model registration request] 1. A vertical reinforcing bar 3 and a horizontal reinforcing bar 4, which are located around the opening 2, are arranged in the same reinforcing plane as the wall reinforcing bar 6 and are joined to the ends of the wall reinforcing bar 6. , And its longitudinal reinforcement 3
One of the ends of the horizontal reinforcing bar 4 and the lateral reinforcing bar 4 is bent toward the opening 2 side in the same bar arrangement surface at the corner portion of the opening to form a bent portion a that is appropriately inclined. In addition, a loop-type diagonal reinforcing bar 10 in which the reinforcing bar is bent into a trapezoidal shape and the butt ends are welded b is provided, and the loop-type diagonal reinforcing bar 10 is provided at the opening corner portion of the bending section a. Along the anti-opening 2 side, the reinforcing bar forming the bent portion a and the wall reinforcing bar 6 are located in the same bar arrangement plane, and the middle portion of the loop-type diagonal reinforcing bar 10 and its folding An opening reinforcing bar characterized in that the bent part a is bound at a proper position with a band plate 11 and each part of the loop-type diagonal reinforcing bar 10 is appropriately joined to the wall bar 6.