JP2002115369A - Prefabricated reinforcement member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a prefabricated reinforcement member easily mountable on a main reinforcement by allowing the positional relation of a reinforced concrete member to the main reinforcement to be assured to a desired positional relation before placement of concrete. SOLUTION: This prefabricated reinforcement member 1 comprises a pair of parallel receiving reinforcements 2 and 2 and a pair of diagonal reinforcements 3 and 3 formed by bending in a triangular wave shape. The width D1 of the pair of receiving reinforcements 2 and 2 of each diagonal reinforcement 3 in the in the parallel direction is formed larger than a distance between the pair of receiving reinforcements 2 and 2 and generally equal to a distance between a pair of main reinforcements 8 and 8 of a reinforced concrete member 7. A diagonal part 5 tilted relative to the receiving reinforcements 2 and 2 comes in contact crossingly with the receiving reinforcements 2 and 2, and fixedly welded to the receiving reinforcements 2 and 2 at contact positions 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-assembled reinforced member which is incorporated into a reinforced concrete beam member or a reinforced concrete column member for reinforcement (for reinforcement against shearing or the like).

[0002]

2. Description of the Related Art Conventionally, as a pre-assembled reinforcing member to be incorporated into a reinforced concrete beam member or a reinforced concrete column member (hereinafter simply referred to as a reinforced concrete member) for shear reinforcement, for example, Japanese Unexamined Patent Publication No. 61-78 is known.
No. 948 is known.

[0003] This kind of pre-assembled rebar member has a pair of parallel receiving rebars (linear rebars) and a triangular wave shape (zigzag shape).
And a pair of skewing reinforcing bars bent. In this case, the pair of skewing reinforcing bars extend in the longitudinal direction of the receiving bar so that the oblique portions inclined relative to the receiving bar cross each other. Each of the oblique reinforcing bars is connected to the receiving bar by welding or the like at the bent portion (the top of the triangular wave shape).

[0004] The pre-assembled reinforcing bar member configured as described above includes:
When incorporating into a reinforced concrete member, usually, before pouring concrete, a pair of receiving reinforcements are placed between a pair of main reinforcements located on each side of the reinforced concrete member (beam member or column member). And are arranged to extend substantially in parallel. Then, the pre-assembled rebar member is temporarily fixed to the main rebar via a wire or the like, and concrete is cast in this state. Thereby, the pre-assembled reinforced member is incorporated into the reinforced concrete member.

However, in the conventional pre-assembled rebar member, the whole is temporarily fixed to the main bar by a wire or the like in a state of being separated from the main bar, so that it is difficult to perform the temporary fixing operation, and
Due to the weight of the pre-assembled rebar member or the bending of the wire for temporary fixing, the pre-assembled rebar member is likely to be displaced with respect to the main rebar. For this reason, there are many cases where concrete is poured in a state in which this displacement has occurred. In such a case, the reinforcement of the reinforced concrete member by the pre-assembled reinforced member becomes insufficient, or a portion of the reinforced concrete member causes inconvenient shear strength or bending strength. There was a fear. Further, in the case where a through hole used for equipment piping or the like is formed in the reinforced concrete member in a direction perpendicular to the axial direction of the reinforced concrete member (extending direction of the main reinforcing bar), a pre-assembly for the sleeve forming the through hole is provided. There was a disadvantage that the displacement of the reinforcing member also occurred.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and is intended to secure a desired positional relationship with a main reinforcing bar before placing concrete in a reinforced concrete member. An object of the present invention is to provide a pre-assembled rebar member that can be easily attached to a main bar.

[0007]

In order to achieve the above object, a pre-assembled reinforcing member according to the present invention has a pair of receiving bars extending in parallel with each other, and a pair of receiving bars attached to the pair of receiving bars. A pair of skewing reinforcing bars which are formed in a triangular wave shape and extend in the longitudinal direction of the receiving bar, and are arranged side by side so that inclined portions inclined with respect to the receiving bar cross each other. Before placing concrete of the member, the pair of receiving bars are arranged so as to extend in parallel with the main bars between the pair of parallel main bars of the reinforced concrete member, and are temporarily fixed to the pair of main bars, A pre-assembled reinforcing member to be incorporated into the reinforced concrete member by subsequent casting of concrete, wherein each of the pair of skew reinforcing bars has a width in a parallel direction of the pair of receiving bars. From muscle spacing The slant portion is formed so as to be substantially the same as the interval between the pair of main reinforcements, crosses while contacting the pair of reinforcements, and is fixed to the pair of reinforcements at the contact point. It is characterized by the following.

According to the pre-assembled rebar member of the present invention,
Since the width of each of the pair of skew reinforcing bars in the parallel direction of the pair of receiving bars is substantially the same as the interval between the pair of main bars of the reinforced concrete member, the pre-assembled reinforcing member of the present invention is provided on the pair of main bars. The work of temporarily fixing is performed in a state where each bent portion of the pair of oblique reinforcing bars is brought into contact with the pair of main bars, and the bent portion is tied to the main bar by a general-purpose cord-like member such as a wire. It can be done by fixing. At this time, since the bent portion of the oblique reinforcing bar fixed to the main bar is in contact with the main bar, the bent portion can be firmly fixed to a desired portion of the main bar, and as a result, the pre-assembled rebar member Can be fixedly positioned with respect to the main muscle. Also,
At this time, the pair of receiving bars fixed to the oblique portions of the respective oblique reinforcing bars of the pre-assembled reinforcing members have a fixed interval with the pair of main bars, and the interval is maintained. Therefore, it extends between the main muscles in parallel with the main muscles.

As a result, when the concrete is poured after the above-mentioned temporary fixing, the pre-assembled reinforcing member does not shift with respect to the main bar, and maintains an appropriate positional relationship with the main bar. As it is, it will be incorporated into the reinforced concrete member.

Therefore, according to the pre-assembled reinforced member of the present invention, before the concrete is poured into the reinforced concrete member,
It can be easily attached to the main muscle so that the positional relationship with the main muscle is secured in a desired positional relationship.

In the present invention, the distance between the pair of receiving reinforcements is determined by the pair of skewing reinforcing bars between the pair of receiving reinforcements when the pre-assembled reinforcing member of the present invention is incorporated into a reinforced concrete member. It is preferable that the rectangular frame to be formed has such an interval that a through hole used for equipment piping or the like can be formed in the reinforced concrete member in a direction perpendicular to the receiving bar.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a pre-assembled reinforcing bar member of the present invention will be described with reference to FIGS. 1 is a side view of the pre-assembled reinforcing bar member of the present embodiment, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is a reinforcing bar in a cross section of a reinforced concrete beam member incorporating the pre-assembled reinforcing bar member of FIG. FIG. 4 is a sectional view showing the structure, and FIG.

As shown in FIGS. 1 and 2, the pre-assembled reinforcing bar member 1 of the present embodiment includes a pair of linear receiving bars 2, 2 extending in parallel with each other, and a pair of receiving bars 2, 2. It is composed of a pair of fixed skewing reinforcing bars 3.

As shown in FIG. 1, each of the pair of skew reinforcing bars 3 and 3 is bent in a zigzag manner at regular intervals and formed in a triangular wave shape. Extends.

The pair of skew reinforcing bars 3 are shown in FIG.
As shown in FIG. 2, the pair of receiving bars 2, 2 are sandwiched between the pair of skewing reinforcing bars 3, 3, and both sides of the pair of receiving bars 2, 2 (both sides in the left-right direction of FIG. ) It is juxtaposed. In this case, as shown in FIG. 1, the pair of skewing reinforcing bars 3, 3 are provided such that the respective skewing portions 5, 5 cross each other in an X shape in side view. Further, each of the skew reinforcing bars 3 has a width D1 in the direction parallel to the receiving bars 1, 1 (vertical direction in FIG. 1) larger than the distance D2 between the receiving bars 1, 1. Skew portions 5 extending on both sides of each bent portion 4 of the streak 3 obliquely intersect the contact streak 1, 1 and are in contact with the streak 1,1. Each skew reinforcing bar 3 has a portion 5a of each skew portion 5 that contacts each receiving bar 2 and is fixed to the receiving bar 2 by welding. Thereby, the pre-assembled reinforcing bar member 1 of the present embodiment in which the receiving bars 1, 1 and the skew reinforcing bars 3, 3 are integrated is configured.

The ends 6, 6 of each of the oblique reinforcing bars 3 extend in parallel with the receiving bars 1, 1 as fixing lengths of joints between columns and beams of the reinforced concrete building. Although the details will be described later, the width D1 of each oblique reinforcing bar 2 in the parallel direction of the receiving bars 1 and 1 is substantially the same as the distance between a pair of main bars of the reinforced concrete member incorporating the pre-assembled reinforcing bar member of the present embodiment. Have been.

Next, the manner of assembling the pre-assembled reinforcing member 1 configured as described above into a reinforced concrete member (beam member or column member) will be described with reference to FIGS.

FIG. 3 is a drawing showing the reinforcing structure of the reinforced concrete beam member 7, for example, in a cross section of the beam member 7. This beam member 7 has four linear main reinforcing bars 8, 8,
8, 8 are provided extending parallel to each other in the direction of the material axis of the beam member 7. In the present embodiment, for example, two pre-assembled rebar members 1 and 1 are incorporated in the beam member 7.

One of the two pre-assembled reinforcing members 1, 1 is disposed between a pair of main reinforcing bars 8, 8 which are vertically arranged in parallel at a position on the left side of the beam member 7, for example. The reinforcing bar member 1 is disposed between a pair of main bars 8, 8 which are vertically arranged on the right side of the beam member 7. In this case, each of the pre-assembled reinforcing bars 1 extends between the pair of main bars 8, 8 whose receiving bars 2, 2 are located on the left and right side surfaces of the beam member 7, in parallel with these main bars 8, 8. It is arranged so that it exists.

Referring to FIGS. 3 and 4, in this embodiment, each of the pre-assembled reinforcing members 1 has a width D1 of the skew reinforcing bars 8, 8 in the direction parallel to the receiving bars 2, 2. The distance between the pair of main reinforcements 8 on the left and right side surfaces of the member 7 is substantially the same as that of the pair of main reinforcements 8. Has been contacted.

The four main reinforcing bars 8, 8, 8, 8 of the beam member 7 are provided.
If necessary, a hoop or the like (not shown) may be wound around the main bar 8 at an appropriate interval in the longitudinal direction of the main bar 8.

When such a concrete beam member 7 is formed, before the concrete is poured into the beam member 7, each pre-assembled reinforcing bar 1 is attached to each of the left and right side surfaces of the beam member 7 at the construction site. Temporarily fixed to the pair of main bars 8, 8 located, concrete is poured in this temporarily fixed state.

At the time of this temporary fixing, in this embodiment,
As shown in FIG. 4, each bent portion 4 of each oblique reinforcing bar 3 of the pre-assembled reinforcing bar member 1 is brought into contact with main bars 8, 8 which are vertically arranged in parallel, and the pre-assembled reinforcing bar member 1 is longitudinally extended. In the state of alignment in the directions, each bent portion 4 of each skew reinforcing bar 3 in contact with the main bar 8, 8 is tied to the main bar 8, 8 by a general-purpose string member 9 such as a wire, and fixed. This allows
The pre-assembled reinforcing bar member 1 is temporarily fixed to the main reinforcing bar 8. In this case, it is not always necessary to bind all the bent portions 4 of the oblique reinforcing bars 3 of the pre-assembled reinforcing bar member 1 to the main bars 8, 8 by the string-shaped members 9, and some of the bent portions 4 are selectively provided. Main muscle 8,
8 may be bound.

Since the bent portions 4 of the skew reinforcing bars 3 of the pre-assembled reinforcing members 1 are in contact with the main bars 8 when temporarily fixed as described above, the bent portions 4 are connected to the main bars 8 by string-like members. 9, it is possible to easily perform the work of binding and fixing, and to firmly fix the bent portion 4 to the main reinforcement 8 so that the pre-assembled rebar member 1 is positioned in a desired positional relationship with respect to the main reinforcement 8. it can.

For this reason, the positional relationship between the pre-assembled reinforcing bar member 1 and the main reinforcing bar 8 is fixedly determined by the temporary fixing, and when the concrete is poured after the temporary fixing, the pre-assembled reinforcing bar member 1 is moved. It is possible to avoid a situation in which the main muscle 8 is displaced. Further, since the pre-assembled reinforcing bar member 1 can be firmly temporarily fixed to the main reinforcing bar 8, the temporary fixing ensures that the spacing between each receiving bar 2, 2 of the pre-assembled reinforcing bar member 1 and the pair of main reinforcing bars 8, 8 is fixed. Is maintained.

As a result, the shear strength and the bending strength of the beam member 7 incorporating the pre-assembled rebar member 1 can be reliably ensured to the desired strength, and the strength is reduced to the beam member 7.
Can be uniform in the longitudinal direction.

Next, another embodiment of the pre-assembled reinforcing bar member of the present invention will be described with reference to FIG. Note that the pre-assembled rebar member of this embodiment is structurally the same as that of the above-described embodiment, and only a part of the size is different from that of the above-described embodiment. Description will be made using the same reference numerals.

FIG. 5 is a side view showing a state in which the pre-assembled reinforcing bar member 1 in this embodiment is attached to the main reinforcing bars 8, 8 of the reinforced concrete beam member 7 as in FIG.

Referring to FIG. 5, the pre-assembled rebar member 1 of the present embodiment has a pre-assembled rebar member (see FIGS. 4 is larger than the pre-assembled rebar member shown in FIG. 4) and is fixed to the sloping portion 5 of each skewing reinforcement 3 at a position closer to the bent portion 4 of each skewing reinforcement 3. This is different from the previous embodiment. The other configuration is exactly the same as that of the previous embodiment.

The pre-assembled reinforcing bar member 1 according to the present embodiment comprises:
It is needless to say that the same effect as in the previous embodiment can be obtained, and that the pre-assembled reinforced member 1 is required to be installed in the reinforced concrete beam member 7 in the same manner as in the previous embodiment. The beam member 7 while maintaining a high strength.
This is suitable for forming a through hole 10 used for equipment piping and the like as shown by a virtual line. In this case, the through hole 10
The direction perpendicular to the receiving bars 2 and 2 between the pair of receiving bars 2 and 2 of the pre-assembled reinforcing member 1 and within the rectangular frame 11 formed by the skew reinforcing bars 3 and 3 (FIG. 5) In the direction perpendicular to the plane of the drawing). In this case, it is needless to say that the through-holes 10 need not be formed in all the rectangular frames 11 formed by the skew reinforcing bars 3.

In each of the embodiments described above, the case where the pre-assembled reinforcing member 1 is incorporated into the left and right side portions of the beam member 7 has been described as an example. Incorporating the pre-assembled reinforcing member 1 into the side surface (incorporating the pre-assembled reinforcing member 1 into the four side surfaces of the beam member 7)
Alternatively, the pre-assembled reinforcing member 1 may be incorporated only into the upper and lower side surfaces. In this case, FIG.
In the beam member 7, the interval between the pair of main bars 8, 8 arranged in the left and right direction on each of the upper and lower side surfaces is different from the interval between the pair of main bars 8, 8 arranged in the upper and lower directions on each of the left and right side surfaces. When the pre-assembled reinforcing bar member 1 is to be incorporated into the upper and lower side portions by using such a beam member 7, the receiving reinforcements 2, 2 of the pre-assembled reinforcing bar member 1 are used.
The width in the side-by-side direction is set to be substantially the same as the interval between the pair of main bars 8, 8 arranged in the left-right direction on the upper and lower side surfaces of the beam member 7.

Further, in each of the above embodiments, the case where the pre-assembled rebar member 1 is incorporated into the beam member 7 has been described. However, the pre-assembled rebar member 1 may be incorporated into the column member.
In this case, as in the case of the beam member 7, the pre-assembled rebar member 1 is incorporated between a pair of main bars parallel to each other at two opposing side surfaces or four side surfaces of the column member. I just need.

[Brief description of the drawings]

FIG. 1 is a side view of a pre-assembled reinforcing bar member according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view showing a reinforcing structure in a cross section of a reinforced concrete beam member into which the pre-assembled reinforcing member of FIG. 1 is incorporated.

FIG. 4 is a view taken in the direction of arrow IV in FIG. 3;

FIG. 5 is a side view showing a reinforcing arrangement structure of a reinforced concrete beam member incorporating a pre-assembled reinforcing bar member according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pre-assembled reinforcing member, 2 ... Receiving rebar, 3 ... Skew reinforcing bar, 4
… Bend, 5… Skew, 7… Reinforced concrete beam,
8 ... Main line.

Claims (1)

[Claims] 1. A pair of receiving bars extending in parallel and in parallel,
Attached to the pair of receiving muscles, bent and formed in a triangular wave shape, extends in the longitudinal direction of the receiving muscle, and is arranged side by side so that inclined portions inclined with respect to the receiving muscle cross each other. A pair of skewing reinforcing bars, and before the concrete of the reinforced concrete member is poured, disposed between the pair of parallel main bars of the reinforced concrete member so that the pair of receiving bars extend parallel to the main bars. And is temporarily fixed to the pair of main reinforcements, and is then pre-assembled into the reinforced concrete member by pouring concrete, wherein each of the pair of skew reinforcing bars is the pair of receiving reinforcements. The width in the side-by-side direction is larger than the interval between the pair of receiving streaks and is formed substantially the same as the interval between the pair of main streaks, and the skewed portion crosses while contacting the pair of receiving streaks. , That contact A pre-assembled reinforcing bar member fixed to the pair of receiving bars at locations.