JP2003105924A - Reinforcement coupler of structural member and its coupling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement coupler allowing anyone to easily couple together reinforcements passed through different holes, among reinforcements passed through holes cut in shape steel, for a structural member used in the manufacture of a floor board of a concrete structure such as a bridge, consisting of a bottom plate formed of a steel plate, shape steel members formed of I- or H-shaped steel members fixed on the bottom plate at regular intervals, and reinforcements passed through holes cut in the shape steel members. SOLUTION: One wire is folded at its center and curved into an S shape as a whole, with hook parts 22 and 23 formed on both sides in opposite directions. One of the hook parts 22 is hooked to the reinforcement 27 passed through the hole 26 cut in the I-shaped steel member 25, and the other hook part 23 is pressed and hooked to another reinforcement 27 passed through another hole 26, whereby the reinforcements 27 are connected together.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is used for manufacturing floor slabs of bridges and other steel concrete composite structures,
The present invention relates to a reinforcing bar connecting metal fitting of a structural member in which a reinforcing bar is reinforced in a shaped steel made of I-shaped steel or H-shaped steel, and a connecting method thereof.

[0002]

2. Description of the Related Art As a floor slab for bridges and the like, a steel-concrete composite floor slab (hereinafter simply referred to as "composite floor slab") is known in which concrete is placed on a structural member in which H-shaped steel or I-shaped steel is reinforced. To be FIG. 1 shows a typical type of such a synthetic floor slab, in which a shaped steel 2 made of an I-shaped steel or an H-shaped steel is arranged at regular intervals on an embedded mold (bottom plate) 1 made of a steel plate. It consists of a structural member 5 in which reinforcing bars 4 are arranged in holes 3 formed in a shaped steel 2 and concrete 6 is cast into the structural member 5.

In the conventional method for manufacturing such a composite floor slab, a structural member is manufactured in a factory and is transported to the factory or another factory to pour concrete, and the precast material is transported to the site to support the pier. Method of attaching to the bridge girder erected above, producing structural members at the factory and making them prefabricated, transporting this to the site and mounting it on the bridge girder, placing concrete, assembling structural members and placing concrete There is a method to perform all the processes up to the site. Of these, the method of producing a synthetic floorboard or structural member in a factory has the advantage that the work efficiency is improved and the risk of working at high places is low compared to performing all the steps at the construction site. When transporting structural members to a concrete pouring factory or a construction site, it is necessary to fix the reinforcing bars so that the reinforcing bars do not slip or move from the shaped steel during loading or unloading work on a truck, trailer, or the like. Similarly, when pouring concrete at a factory or construction site, it is necessary to fix the reinforcing bars so that they do not move. Conventionally, this rebar is fixed by welding to a shaped steel.

[0004]

Fixing the reinforcing bars by welding requires equipment for welding and a welder,
The strength of the welded part is also reduced. SUMMARY OF THE INVENTION It is an object of the present invention to provide a connecting metal fitting and a connecting method thereof, which enables any person to easily fix a reinforcing bar without deteriorating the strength and without requiring a fixing facility.

[0005]

The invention according to claim 1 includes a bottom plate,
Bridges and other steel-concrete composite structures are made up of shaped steels made of I-shaped steels and H-shaped steels arranged at regular intervals on the bottom plate and rebars arranged through holes formed in each shaped steel. In a structural member used for manufacturing a floor slab, a reinforcing bar connecting tool used for connecting reinforcing bars which are passed through different holes among reinforcing bars which are passed through holes formed in shaped steel,
A holding part that holds a reinforcing bar that is passed through a hole formed in a shaped steel by bending a metal wire or band, and a hook part that is hooked on the reinforcing bar that is passed through another hole formed in the shaped steel. And the reinforcing bars are connected at the shortest distance between the holes by the holding section and the hook section.

According to the present invention, the reinforcing bars are connected by pushing the hook portion into the other reinforcing rod while the holding portion is hooked on the one reinforcing rod. Since the reinforcing bars connected in this manner are connected in contact with the edge of the hole, which is the shortest distance between the holes, the movement within the hole is restricted. Further, the two rebars connected to each other are also restrained from moving in the axial direction by being caught by the connecting fitting or the hole edge, or by frictional resistance. Therefore, the reinforcing bar is fixed in a state in which lateral and axial movements are restricted. As the bottom plate used for the structural member of the present invention, for example, a steel plate, a resin plate such as FRP, or the like can be used.

The invention according to claim 2 is characterized in that the holding portion in the invention according to claim 1 is a hook portion. According to the present invention, since the holding portion is the hook portion and the connecting fitting has the hook portions on both sides, the structure is simple.

The form of the connecting fitting of the present invention is of a type in which the hook portions 11 are formed in the same direction as shown in FIG. 2, and the connecting fitting 12 is formed in an S shape as shown in FIG. Although there is a type in which the hook portion 13 is formed in the reverse direction, the latter type in which the hook portion is formed in the reverse direction is preferable. This is because the contact length between the hook portion 13 and the reinforcing bar 14 can be made longer than the contact length between the hook portion 11 and the reinforcing bar 14 shown in FIG. 2, and the gripping force with the reinforcing bar is increased.

The invention according to claim 3 relates to a method for connecting reinforcing bars using the connecting fitting according to claim 2, wherein shaped steel is sandwiched and the reinforcing bars on both sides thereof are respectively connected by the connecting fittings according to claim 1. It is characterized by doing. According to the present invention, the lateral movement of the reinforcing bar, particularly the axial movement of the reinforcing bar, can be more securely restrained and can be firmly fixed to the shaped steel.

The invention according to claim 4 is the bent portion of the wire or band in which the holding portion of the invention according to claim 1 is bent in a U shape, and the hook portion is bent in a U shape. Is formed at each end of the. According to the present invention, one rebar is hooked and held on the hook portion at two places.

The invention according to claim 5 relates to a method for connecting reinforcing bars using the connecting fitting according to claim 4, wherein one of the reinforcing bars is applied to the bent portion of the holding portion along the shaped steel.
Then , it is characterized in that both hook parts sandwich the shaped steel, and are hooked on the reinforcing bars on both sides thereof to be connected. According to the present invention, the reinforcing bar can be firmly fixed to the shaped steel by using one connecting fitting.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The connecting fitting 21 shown in FIG.
With a connecting metal fitting of the type shown in Fig. 1, one wire is folded at the center and the whole is further bent into an S shape, and the hook portion 22 which is the holding portion on one side and the hook portion 23 on the other side are turned upside down. The hook portion 23 on the other side is further bent outward to form a knob 24.

In the illustrated example, one wire is folded at the center and the whole is further bent into an S shape, and hook portions are formed on both sides. However, one thick wire is formed into an S shape. It may be bent to form hook portions on both sides.

FIG. 5 shows a mode in which a reinforcing bar 27, which is passed through a hole 26 formed in the shaped steel 25, is coupled to one side of the I-shaped steel 25 by using the coupling fitting 21 shown in FIG. Rebar 27
In the connection of, the hook 24 is hooked on one of the reinforcing bars 27, the knob 24 is grasped, and the hook 23 is expanded and pushed into the other reinforcing bar 27 to be connected.

The connecting fitting 31 shown in FIG. 6 is formed by bending a piece of wire into a U-shape at the center to form a bent portion 32 which serves as a holding portion. Each end of the wire bent into a U-shape is formed. Further, the hook portion 33 and the knob 34 are formed by bending.

FIG. 7 shows a mode in which the reinforcing bars 27 are connected on both sides of the I-shaped steel 25 by using the connecting fittings 31 shown in FIG. 6. The reinforcing bars 27 are connected to the bent portion 32 at one of the reinforcing bars 27. Then, the hook portion 33 is hooked on the rebar 27 at one side of the I-shaped steel 25 by grasping the knob 34 of the one hook portion 33 along the both sides of the I-shaped steel 25. Then, similarly, by grasping the knob 34 of the other hook portion 33, the hook portion 3
3 is hooked on the reinforcing bar 27 on the other side of the I-shaped steel 25 in the same manner,
Both rebars 27 are connected.

[0017]

According to the connecting metal fitting of the invention of claim 1, the hook portion is hooked on the reinforcing bar passed through another hole while the holding portion is hooked on the reinforcing bar passed through the hole formed in the shaped steel. You can connect the rebars that have passed through different holes just by performing the operation, and in the connected state, the rebars are connected while being in contact with the edge of the shortest distance between the holes, so the movement in the hole and the axial direction Is fixed in a state in which the movement of is constrained. Further, as compared with the case where the reinforcing bar is fixed to the shaped steel by welding, the strength does not decrease due to welding.

According to the second aspect of the invention, the structure is simple and the manufacturing cost of the connecting fitting can be reduced. According to the invention of claim 3, since the reinforcing bars are connected by the connecting metal fittings on both sides of the shaped steel, the reinforcing bars can be firmly fixed to the shaped steel.

According to the invention of claim 4, one of the reinforcing bars is hooked on the hook portion at two places, so that the reinforcing bars can be securely fixed. According to the invention of claim 5, the same effect as that of the invention of claim 3 can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of concrete of a synthetic floor slab is cut away.

FIG. 2 is a side view showing an aspect of a connecting fitting.

FIG. 3 is a side view showing another mode of the connecting fitting.

FIG. 4 is a perspective view of a connecting fitting.

5 is a view showing a mode in which reinforcing bars are connected using the connecting fitting shown in FIG.

FIG. 6 is a perspective view showing another mode of the connecting fitting.

7 is a view showing a mode in which reinforcing bars are connected using the connecting fitting shown in FIG.

[Explanation of symbols]

11, 13, 22, 23, 33 ... Hook part 12, 21, 31, ... Connecting fittings 14, 27 ... Reinforcing bars 24, 34 ... Knobs 25 ... I-shaped steel 26 ... holes

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tetsuo Sawamoto             1-24 Tsukiji-cho, Kure-shi, Hiroshima Dyke Co., Ltd.             Within (72) Inventor Hiroshi Tsuzu             1-24 Tsukiji-cho, Kure-shi, Hiroshima Dyke Co., Ltd.             Within F term (reference) 2D059 AA17 GG55                 2E164 BA44 BA48

Claims (5)

[Claims] 1. A bottom plate and I arranged on the bottom plate at regular intervals.
In structural members used to manufacture floor slabs of bridges and other steel-concrete composite structures, which consist of shaped steel consisting of shaped steel and H-shaped steel, and rebars that are reinforced through holes formed in each shaped steel. , Out of the rebars that are passed through the holes in the shaped steel,
A reinforcing bar connector used for connecting reinforcing bars that are passed through different holes, which is a holding portion that holds a reinforcing bar that is passed through a hole formed in a shaped steel by bending a metal wire or band. A structure characterized by having a hook part hooked on a reinforcing bar that is passed through another hole formed in a shaped steel, and the reinforcing bar being connected at the shortest distance between the holes by the holding part and the hook part. Reinforcing bar connection fittings for members. 2. The reinforcing bar connecting fitting for a structural member according to claim 1, wherein the holding portion is a hook portion. 3. A reinforcing bar connecting method, wherein the reinforcing bar connecting fitting according to claim 2 is used to connect the reinforcing bars on both sides of the shaped steel by sandwiching the shaped steel. 4. The holding portion is a bent portion of a wire or band bent in a U shape, and the hook portion is formed at each end of the wire or band bent in the U shape. The reinforcing bar connecting fitting for the structural member according to claim 1. 5. The reinforcing bar connecting metal fitting according to claim 4, wherein one of the reinforcing bars is hung on the bent part of the holding part along the shaped steel,
A method of connecting reinforcing bars, characterized in that both hooks are sandwiched between shaped steels and are hooked on the reinforcing bars on both sides thereof to be connected.