JPH0716683A - Manufacture of reinforcing-bar basket - Google Patents

Abstract

PURPOSE:To reduce labor and time required for bending by easily joining main reinforcement and sheared reinforcing bars together and bending each sheared reinforcing bar at the same time. CONSTITUTION:Plural sheared reinforcing bars 13 are arranged horizontally in parallel at specified intervals mutually. The plural main reinforcements 11A-12C are mounted on the respective sheared reinforcing bars 13 in parallel at specified intervals so as to orthogonally cross to auxiliary reinforcing bars 14. The crossing parts between the respective auxiliary reinforcing bars 14 and the respective main reinforcements 11A-12 are joined together by binding, etc. The respective sheared reinforcing bars 13 are bent orthogonally at the crossing parts to the main reinforcements 11A, 11C, 12A and 12C and formed into an annular shape. Both ends 13a and 13b of each sheared reinforcing bar 13 are joined together mutually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rebar cage comprising a main bar and an annular shear reinforcing bar.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a reinforcing bar cage A shown in FIG. 5, that is, a reinforcing bar cage A consisting of a plurality of main bars 1 and a plurality of shear reinforcing bars 2, the reinforcing bars are bent to form an annular shear reinforcing bar 2. Is prepared in advance, and the main reinforcement 1 is inserted into each shear reinforcement reinforcement 2. Then, the intersections of the main reinforcement 1 and the shear reinforcement reinforcement 2 are joined together by binding or welding. Thereby, the reinforced basket A is manufactured.

[0003]

In the above-mentioned conventional manufacturing method, each reinforcing bar must be bent in order to form each shear reinforcing bar 2, and bending of each reinforcing bar requires a great deal of labor. Further, since the shear reinforcing bar 2 has an annular shape, it is difficult to connect the main reinforcing bar 1 and the shear reinforcing bar 2 together. For these reasons, the conventional manufacturing method has a problem that the productivity of the rebar cage A is low.

[0004]

The present invention has been made to solve the above problems, and a plurality of main bars arranged in parallel to each other on one plane and arranged so as to be orthogonal to each main bar. It is characterized in that after connecting a plurality of shear reinforcing bars at respective intersections, each shear reinforcing bar is bent into an annular shape, and then both ends of each shear reinforcing bar are connected.

[0005]

[Operation] Since the main reinforcement and the shear reinforcement are connected in a straight line, the connection is easy. Moreover, when each shear reinforcing bar is bent into an annular shape, each shear reinforcing bar is bent and processed simultaneously.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. 1 (A), (B),
1C and 1D show an embodiment of the present invention. First, the structure of a rebar cage B manufactured by the manufacturing method of the present invention will be described with reference to FIGS. 1C and 1D. Then, the reinforcing bar cage B includes an upper main bar group 11 including a plurality of (three in this embodiment) main bars 11A, 11B, and 11C.
A plurality (the same number as the upper main muscle group 11 in this embodiment) of main muscles 12
A lower main muscle group 12 composed of A, 12B, and 12C, and a lower main muscle group 11 and 12 wound around the upper and lower main muscle groups 11 and 12, respectively.
1 and 12 are provided with a plurality of shear reinforcing bars 13 which are arranged apart from each other at a predetermined interval in the longitudinal direction.

Main muscles 11A, 11B, 11 of the upper main muscle group 11
The Cs are arranged in parallel with each other with a predetermined interval l. On the other hand, the main muscles 12A, 12B, 12C of the lower main muscle group 12
Are arranged in parallel with the upper main muscle group 11 and at a predetermined interval L, and are arranged vertically opposed to the main muscles 11A, 11B, 11C, respectively. Therefore, the outline of the entire upper and lower main muscle groups 11 and 12 as viewed in the longitudinal direction is rectangular.

The shear reinforcing bar 13 is composed of the upper and lower main bar groups 1
It is wound on the outer sides of 1 and 12 so as to be substantially orthogonal to the respective main bars 11A to 112C, and is joined to the respective main bars 11A to 12C at respective intersections. Both ends 13a and 13b of the shear reinforcing bar 13 are vertically attached so that their outer peripheral surfaces are in contact with each other, and are joined and fixed by binding or the like.

Next, the case of manufacturing the rebar cage B having the above structure will be described. First, as shown in FIG. 1A, the main bar groups 11 and 12 are arranged in parallel on one plane at a predetermined interval. In this case, the main muscles 11A, 11 of the upper main muscle group 11
B, 11C, main muscles 12A, 12B, 12 of the lower main muscle group 12
C are arranged at a predetermined interval l, and the upper and lower main muscle groups 11,
Of course, 12 should be arranged at a predetermined interval L.

Next, the shear reinforcing bar 13 is connected to the upper and lower main bar groups 1
1 and 12 are arranged so as to be orthogonal to each other and each main muscle 11A to
The intersection of 12C and the shear reinforcement 13 is joined. In this case, regarding the shear reinforcement bar 13, the upper and lower main bar groups 11, 1
A rectangle slightly longer than the total length of the rectangle defined by 2 is used. And, as long as the length is long, the shear reinforcement 1
One end portion 13b of No. 3 is projected rightward from the main muscle 11A.
Therefore, the other end portion 13a located on the left side of the main bar 12A
Is approximately equal to the distance L. Of course, this may be reversed. In addition, at the time of joining, the shear reinforcing bars 13 may be arranged one by one with respect to the main bar groups 11 and 12 so that the respective crossing portions are bonded, or after all the shear reinforcing bars 13 are lined up, the crossing portions are joined. May be combined. Further, as a joining method, a method of binding with a thin metal wire, welding, or the like can be adopted.

Next, as shown in FIG. 1 (B), each shear reinforcing bar 13 is bent into a rectangular shape (annular shape). In this case, the shear reinforcing bars 13 are bent at the same time. Further, when bending, the intersection with the main reinforcement 11A and the intersection with the main reinforcement 12A are bent at right angles, and then the intersection with the main reinforcement 11C and the main reinforcement 12 are bent.
It is preferable that the intersections with C be bent at right angles.

The shear reinforcing bar 13 is bent as described above and vertically attached so that the outer peripheral surfaces of the both end portions 13a and 13b are in contact with each other. Then, both ends thereof are joined and fixed by binding 13a and 13b or by welding. As a result, the linear reinforcing reinforcement 13 is formed in an annular shape, and at the same time, the reinforcing bar basket B is manufactured.

In the above manufacturing method, the shear reinforcing bar 1 is used.
Since 3 is connected to the main muscles 11A to 12C in a straight state, both can be easily connected. Also,
Since each of the shear reinforcing bars 13 can be bent at the same time, the labor required for the bending process can be significantly reduced as compared with the case of manufacturing each of the shear reinforcing bars 13 individually. Therefore, the productivity of the rebar cage B can be improved.

Next, another embodiment of the present invention will be described. 2 (A) and 2 (B) show another example of the reinforcing bar cage manufactured by the manufacturing method of the present invention. In this reinforcing bar cage C, both end portions 13a, 1 of the shear reinforcing bar 13 are shown.
3b is bent so as to wind the main bar 11A over approximately 135 °. Of course, both ends 13a, 13b
The main bar 11A and the main bar 11A are connected by binding, welding, or the like.

When manufacturing such a rebar cage C,
After the main reinforcements 11B to 12C other than the main reinforcement 11A and the shear reinforcements 13 are connected in the same manner as described above, the shear reinforcements 1
Bend 3 In this case, both ends 1 of the shear reinforcing bar 13
3a and 13b are bent by approximately 135 °. After that, the main bars 11A are inserted between the both end portions 13a and 13b to join them.

Further, a rebar cage D shown in FIGS. 3 (A) and 3 (B).
Is a method in which both ends of the shear reinforcing bar 13 are butted and welded by an electric resistance welding method, a gas pressure welding method or the like.

Further, in the rebar cage E shown in FIGS. 4A and 4B, the second muscle 14 and the abdominal muscle 15 are arranged on the inner surface of the shear reinforcement muscle 13 located between the upper and lower main muscle groups 11 and 12. It is the one. When manufacturing this rebar cage E,
When the main muscles 11A to 12C and the shear reinforcement muscle 13 are coupled, the second muscle 14 and the abdominal muscle 15 are coupled to the shear reinforcement muscle 13 at the same time. After the joining, the rebar cage E can be manufactured in the same manner as in the above embodiment.

The present invention is not limited to the above embodiments, but can be modified as appropriate without departing from the scope of the invention. For example, the above embodiment is applied to the rebar cages B, C, D, and E having a rectangular cross section, but it is also possible to apply it to the rebar cages having a circular cross section or a polygonal shape other than rectangular. .

[0019]

As described above, according to the method for manufacturing a reinforcing bar cage of the present invention, a plurality of main bars and a plurality of shear reinforcing bars are arranged so as to be orthogonal to each other, and their intersections are joined together, After that, since the shear reinforcing bar is formed into an annular shape and both ends thereof are connected to each other, the main reinforcing bar and the shear reinforcing bar can be easily connected, and each shear reinforcing bar can be bent simultaneously. Therefore, there is an effect that the productivity can be significantly improved as compared with the conventional manufacturing method.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is shown in FIG.
Is a plan view showing a state in which the main reinforcement and the shear reinforcement are arranged orthogonally to each other, FIG. 1 (B) is a view showing a bending process of the shear reinforcement, and FIG. 1 (C) is manufactured by the manufacturing method of the present invention. 1D is a view of the rebar cage viewed from the longitudinal direction of the main bar, and FIG. 1D is a view on arrow D of FIG. 1C.

FIG. 2 shows another example of a rebar cage manufactured by the manufacturing method of the present invention, and FIGS. 2 (A) and 2 (B) are views similar to FIGS. 1 (C) and 1 (D), respectively. is there.

FIG. 3 shows another example of a rebar cage manufactured by the manufacturing method of the present invention, and FIGS. 3 (A) and 3 (B) are views similar to FIGS. 1 (C) and 1 (D), respectively. is there.

FIG. 4 shows another example of the rebar cage manufactured by the manufacturing method of the present invention, and FIGS. 4 (A) and 4 (B) are views similar to FIGS. 1 (C) and 1 (D), respectively. is there.

FIG. 5 is a perspective view showing an example of a rebar cage.

[Explanation of symbols]

 B rebar cage C rebar cage D rebar cage E rebar cage 11A main bar 11B main bar 11C main bar 12A main bar 12B main bar 12C main bar 13 shear reinforcing bar 13a shear reinforcing bar end 13b shear reinforcing bar end

Claims (1)

[Claims] 1. A plurality of main reinforcements arranged parallel to each other on a plane and a plurality of shear reinforcement reinforcements arranged so as to be orthogonal to the respective main reinforcements are connected at respective intersections, and then the respective shear reinforcement reinforcements are connected. A method for manufacturing a rebar basket, which comprises bending the material into an annular shape, and then joining both ends of each shear reinforcing bar.