JPH10231585A - Shear reinforcement - Google Patents

Abstract

(57) [Problem] To provide a shear reinforcing steel bar capable of improving construction efficiency and reducing cost. SOLUTION: As means for solving the above problems,
A shear reinforcing bar for transmitting shear force to a main reinforcing bar or a distributing reinforcing bar disposed opposite to each other and for preventing buckling, wherein a buckling preventing reinforcing bar hooked to a main reinforcing bar and a main reinforcing bar facing the same. Disclosed is a shear reinforcing reinforcing bar comprising a shear force transmitting reinforcing bar disposed therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shear reinforcing bar for transmitting a shear force to a main reinforcing bar or a distribution reinforcing bar disposed opposite to each other and for preventing buckling.

[0002]

2. Description of the Related Art Conventionally, a reinforcing bar disposed inside a wall-like structure or the like is composed of a main reinforcing bar or a distribution reinforcing bar in the vertical and horizontal directions and a shear reinforcing bar extending between the main reinforcing bars and the like. . The shear reinforcement is required to have a function of transmitting shear force and a function of preventing buckling of the main reinforcing bars and the like.

As shown in FIG. 9, a conventional reinforcing steel bar is formed by bending a hook portion b1 at one end of a steel bar a and hooking the hook portion b on one of the main reinforcing bars c1 and the like. Is bent at the site to form a hook portion b2, and the other end is hooked to the other main reinforcing bar c2 or the like.

[0004] As shown in FIG. 10, hook-like members e1 and e2 having a threaded portion d at one end are connected to respective main reinforcing bars c1 and c.
There is also a hook that is hooked to the second and the like, and these screw portions d are screwed and connected by a coupler f having a through screw hole.

[0005]

When hook portions b are formed at both ends of a steel bar a, it takes time and labor to bend a reinforcing bar on site, and the construction efficiency is poor. In addition, when a large-diameter rebar is used, bending may be difficult.

On the other hand, when two hook-shaped members e are connected by using a mechanical joint such as a coupler f, the cost increases. In addition, since the lower hook-shaped member e needs to be set up at the time of connection, construction efficiency is poor, and work safety may be impaired. Further, when the width between the main reinforcing bars and the like is small, the joint length of the coupler f becomes short, so that the joint strength of the two hook-shaped members e cannot be sufficiently secured.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a shear reinforcing steel bar capable of improving construction efficiency and reducing costs.

[0008]

As a means for solving the above-mentioned problems, the present invention, as a first aspect, transmits a shearing force to a main reinforcing bar or a distributing reinforcing bar disposed opposite to each other and prevents buckling. The present invention provides a shear reinforcing reinforcing bar characterized by comprising a buckling preventing reinforcing bar hooked on a main reinforcing bar and the like, and a shear force transmitting reinforcing bar arranged between opposing main reinforcing bars and the like.

According to a second aspect of the present invention, in the shear reinforcing bar according to the first aspect, the buckling preventing reinforcing bar is formed in a U-shape and is hooked so as to be sandwiched from outside of the main reinforcing bar or the like. Providing shear reinforcement.

According to a third aspect of the present invention, in the shear reinforcing bar according to the first aspect, the buckling preventing reinforcing bar is formed in a U-shape, and is hooked from the outside over a plurality of reinforcing bars such as the main reinforcing bar. The present invention provides a shear reinforcing steel bar characterized by having

According to a fourth aspect of the present invention, in the shear reinforcing bar according to the first aspect, the buckling prevention reinforcing bar has hooks formed by bending both ends of the rod body, and these hooks face each other. A shear reinforcing bar is provided, which is hung on a main reinforcing bar or the like and is bridged between the main reinforcing bars or the like.

According to a fifth aspect of the present invention, in the shear reinforcing bar according to the first aspect, the buckling prevention reinforcing bar is provided at opposite ends of a bar having a length substantially equal to that between stepped horizontal bars such as a main reinforcing bar facing each other. Using one having a hook portion bent at a substantially right angle on the side, the both hook portions were hooked on the stepped horizontal streaks, respectively, and a buckling prevention reinforcing bar was stretched between the opposing main bars and the like. Provided is a reinforcing steel bar characterized by the above-mentioned features.

According to a sixth aspect of the present invention, in the shear reinforcing reinforcing bar according to any one of the first to fifth aspects, the shearing force transmitting reinforcing bar has a bar attached to both ends of a rod. Provide shear reinforcing bars.

According to a seventh aspect of the present invention, in the shear reinforcing reinforcing bar according to any one of the first to fifth aspects, the shear force transmitting reinforcing bar is formed by bending both ends of a rod into a U-shape, a U-shape, or an L-shape. Provided is a reinforcing steel bar characterized by using a reinforcing member.

According to an eighth aspect of the present invention, there is provided a shear reinforcing reinforcing bar according to any one of the first to fifth aspects, wherein the shear force transmitting reinforcing bar is a continuous rectangular shape. I do.

According to a ninth aspect, in the shear reinforcing bar according to any one of the first to fifth aspects, the shear force transmitting reinforcing bar is formed in a rectangular shape by wrapping both ends of one reinforcing bar, Further, the present invention provides a shear reinforcing bar characterized by using a material formed by bending both ends inward of a rectangular body. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0017]

First Embodiment of the Invention <A> Shear Force Reinforcing Bar The shear reinforcing bar of the present invention includes a shearing force transmitting reinforcing bar 1 for transmitting a shearing force to a main reinforcing bar or a distributing reinforcing bar disposed opposite to each other. It comprises a buckling preventing reinforcing bar 2 for preventing buckling, and is characterized in that a shear force transmitting function and a buckling preventing function required for a shear reinforcing bar are separated.

As an example of the shearing force transmitting reinforcing bar 1, as shown in FIGS. 1 and 2, a bar 11 having plate members 12 attached to both ends thereof is used. The rod 11 is mounted at right angles to the plane of the plate 12. The mounting method includes a method of directly attaching the end surface of the rod body 11 to the surface of the plate body 12 by rotary friction welding, and a method of providing a screw at the end of the rod body 11 and screwing into a screw hole formed in the plate body 12. Various methods are conceivable.

The total length of the shear force transmitting reinforcing bar 1 is preferably long enough to be accommodated in the space between the opposing main reinforcing bars and the like in consideration of ease of installation, but may be longer or shorter depending on the case.

<B> Attaching the shear force transmitting reinforcing bar The shear force transmitting reinforcing bar 1 is horizontally mounted between the opposing main reinforcing bars 3 and the like as shown in FIG. The main reinforcing bar 3 is formed in a lattice shape by a vertical bar 31 and a horizontal bar 32. In the present embodiment, the vertical streaks 31 are arranged on the outside and the horizontal streaks 32 are arranged on the inside, but the reverse is also possible. As shown in FIG. 1, the shearing force transmitting reinforcing bar 1 may be attached to the main reinforcing bar 3 and the buckling preventing reinforcing bar 2 with a wire 4 or the like.

When the entire length of the shear force transmitting reinforcing bar 1 is formed shorter than the interval between the main reinforcing bars 3, it can be mounted simply by inserting between the main reinforcing bars 3 and fixing it. -No need for screwing with
Mounting work can be performed easily. In addition, the shear force transmitting reinforcing bar 1
Are mounted at appropriate positions so that a sufficient shear force transmission function can be achieved.

<C> Buckling Preventing Reinforcing Bar As an example of the buckling preventing reinforcing bar 2, a U-shaped member as shown in FIGS. In this case, the length between the inner corners 21 is formed substantially equal to the distance between the upper and lower horizontal streaks 32.

The legs 22 are buried in the concrete, and are set to have a sufficient buckling preventing function. Note that the buckling prevention reinforcing bar 2 and the above-described shear force transmitting reinforcing bar 1 may be bent in advance.
Since it is not necessary to perform bending work on site, a large diameter may be used.

<D> Installation of anti-buckling rebar The anti-buckling rebar 2 is hung so as to be sandwiched from the outside of the reinforcing bar whose buckling is to be prevented. For example, upper and lower two-level horizontal streaks 32
Is fitted in the vertical direction so as to be sandwiched from the outside, and the horizontal streak 32 is hooked at the inside corner 21. If necessary, as shown in FIG.
It is good to put it in one.

It is also conceivable that the two vertical streaks 31 arranged side by side are fitted in the lateral direction so as to sandwich them from the outside, and the vertical streaks 31 are hooked at the inner corners 21. The point is that the required number is mounted at appropriate positions so that a sufficient buckling prevention function can be achieved.

It is also conceivable that the length between the inner corners 21 is extended to be attached to three or more horizontal streaks 32 and three or more vertical streaks 31. Further, the leg portions 22 are also provided between the inner corner portions 21 so as to be formed in a comb shape having three or more leg portions 22, and extend over three rows of the horizontal streaks 32 and three rows or more of the vertical streaks 31. It is also conceivable to attach it.

As described above, the shear reinforcing bar of the present invention is composed of the shearing force transmitting bar 1 and the buckling preventing bar 2 so that the shearing force transmitting function and the buckling preventing function are separated. The same shear force transmission function and buckling prevention function as in the case where the main reinforcing bars are connected by the hook-shaped members at both ends can be ensured.

[0028]

Second Embodiment A buckling prevention reinforcing bar 5 shown in FIG.
It is formed in a U-shape, and its valley portion 51 is
, So as to be pinched from the outside. In the case of FIG. 3, it is a case where the crossing between the vertical streak 31 and the horizontal streak 32 is stopped so as to cross and pinch from outside,
This is a case where the vertical streaks 31 and the horizontal streaks 32 are collectively prevented from buckling.

[0029]

Embodiment 3 of the present invention FIG.
U-shaped or U-shaped bent portions 61 are provided at both ends of the rod body.
Is an embodiment having a total length that can be stored between the main reinforcing bars 3.

[0030]

Embodiment 4 of the present invention FIG.
Is an embodiment in which L-shaped bent portions 71 are formed at both ends of a rod body and have a total length that can be stored between the main reinforcing bars 3. In the third embodiment and the fourth embodiment, the bent portion 61 or 71 may be bent to the opposite side.

[0031]

Fifth Embodiment A shear force transmitting reinforcing bar 8 shown in FIG.
Was formed by wrapping both ends of one reinforcing bar into a rectangular shape such as a rectangle or a square, and further bending both ends of the wrap portion 81 inward of the rectangular shape to form a bent portion 82. It is an embodiment.

[0032]

Embodiment 6 of the present invention FIG.
Is an embodiment in which a continuous rectangular body is formed by welding 91 or the like.

[0033]

Seventh Embodiment A buckling prevention reinforcing bar 10 shown in FIG.
Is an embodiment in which, at both ends of a rod 10a having a length substantially equal to that between the stepped horizontal streaks 32a and 32b of the opposing main reinforcing bar 3, hooking portions 10b and 10c bent at right angles to opposite sides are provided. . The attachment method is a state in which, after being inserted into both the main reinforcing bars 3, the hooking portions 10 b and 10 c are respectively rotated and hooked on the stepped horizontal bars 32 a and 32 b, and are bridged between the opposing main reinforcing bars 3. Attach with.

The length of the rod 10a is substantially equal to the length between the longitudinal bars 31 of the main reinforcing bar 3 facing each other.
It is also conceivable to cross over between one. In this case, the hook portions at both ends of the rod 10a may be bent in the same direction.

[0035]

Since the present invention is configured as described above, the following effects can be expected. <B> Since the shear reinforcing bar is divided into a shear force transmitting reinforcing bar and a buckling preventing reinforcing bar, there is no need to bend the reinforcing bar or screw with the coupler as in the past, and the installation work to the main reinforcing bar, etc. can be performed. It became easier. Therefore, it is possible to improve construction efficiency and work safety.

<B> Since the structure is simple and no mechanical joint is required, the cost can be reduced.

<C> Since the shear reinforcing bar is divided into the shear force transmitting reinforcing bar and the buckling preventing reinforcing bar, the shear force transmitting reinforcing bar and the buckling preventing reinforcing bar can be individually set to optimal amounts of the reinforcing bars, and there is no waste. In the case of a conventional integral shape, there is a possibility that either the shearing force transmission function or the buckling prevention function is wasted.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of Embodiment 1.

FIG. 2 is an explanatory diagram of Embodiment 1.

FIG. 3 is an explanatory diagram of Embodiment 2.

FIG. 4 is an explanatory diagram of a third embodiment.

FIG. 5 is an explanatory view of Embodiment 4.

FIG. 6 is an explanatory diagram of a fifth embodiment.

FIG. 7 is an explanatory view of Embodiment 6.

FIG. 8 is an explanatory diagram of a seventh embodiment.

FIG. 9 is an explanatory diagram of a conventional technique.

FIG. 10 is an explanatory view of a conventional technique.

Continuation of front page (72) Inventor Taisuke Nakamura 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (9)

[Claims] Claims: 1. A shear reinforcing reinforcing bar for transmitting a shearing force to a main reinforcing bar or a distribution reinforcing bar disposed opposite to each other and for preventing buckling, comprising: a buckling preventing reinforcing bar hooked on a main reinforcing bar or the like; A shear reinforcing bar characterized by comprising a shear force transmitting reinforcing bar disposed between main reinforcing bars and the like. 2. The shear reinforcing bar according to claim 1, wherein the buckling preventing reinforcing bar is formed in a U-shape, and is hooked so as to be sandwiched from the outside of the main reinforcing bar or the like. . 3. The reinforcing reinforcing bar according to claim 1, wherein the buckling prevention reinforcing bar is formed in a U-shape, and is hung so as to be sandwiched from outside over a plurality of reinforcing bars such as a main reinforcing bar. Characterized by shear reinforcement. 4. The reinforcing reinforcing bar according to claim 1, wherein the buckling prevention reinforcing bar has hooks formed by bending both ends of the rod body, and these hooks are attached to the opposing main reinforcing bar or the like. A shear reinforcing bar characterized by being hooked and bridged between main reinforcing bars and the like. 5. The shear reinforcing bar according to claim 1, wherein the buckling preventing reinforcing bars are substantially perpendicular to opposite ends of a rod body having a length substantially equal to that of a stepped horizontal bar such as a main reinforcing bar opposed to the reinforcing bar. Using a thing having a hook part bent in the above, the both hook parts are respectively hooked on the stepped horizontal streaks, and a buckling prevention reinforcing bar is bridged between the opposing main bars and the like. Do shear reinforcement 6. The shear reinforcing reinforcing bar according to claim 1, wherein the shearing force transmitting reinforcing bar has a plate attached to both ends of a rod. 7. The shear reinforcing reinforcing bar according to claim 1, wherein the shearing force transmitting reinforcing bar is formed by bending both ends of a rod into a U-shape, a U-shape, or an L-shape. Characterized by a shear reinforcing bar. 8. The shear reinforcing reinforcing bar according to claim 1, wherein the shear force transmitting reinforcing bar has a continuous rectangular shape. 9. The shear reinforcing bar according to any one of claims 1 to 5, wherein the shear force transmitting bar is formed in a square shape by wrapping both ends of one bar, and further forming both ends. A shear reinforcing bar characterized by using a member formed by bending a rectangular body inward.