JP2751797B2 - Rebar joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application field] The present invention relates to a reinforced concrete joint construction in civil engineering and construction, a steel reinforced concrete construction and a pre-cast concrete construction in-situ reinforced joint structure.

[0002]

2. Description of the Related Art Conventionally, the following structure is used.

(A) A lap joint structure in which rebars overlap each other.

(B) Welding structure such as direct butting.

(C) Mechanical joint structure using a threaded coupler.

(D) A grout joint structure using a sheath tube.

[0007]

In the lap joint structure of (a), the reinforcing bar requires an extra length, and the amount of the reinforcing bar increases. In addition, the reinforcing bars may be crowded at the overlapping portion, which may hinder concrete filling.

In the case of the welded joint structure (b), the number of man-hours and facilities are increased, the management becomes complicated, and the cost increases.

In the mechanical structures (c) and (d), precision control is required, which requires a long construction period and increases costs.

The present invention has been devised to solve the above problems.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method of forming a toe of a reinforcing bar to be joined into a U-shape, and forming the toe into the U-shape. A circular space is formed by tatami weighting, and two cylindrical wedges having the same diameter and the same inclined end face are formed in such a manner that they are pressed into each other by abutting the inclined end faces.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is an explanation based on the illustrated embodiment. The toes of the reinforcing bars 4 and 4 to be joined are formed in a U-shape, respectively, and the toes of the U-shaped reinforcing bars 4 and 4 are folded and overlapped to form a substantially circular shape surrounded by a U-shape. Form a space.

On the other hand, the steel cylinder 1 corresponding to the diameter of the U-shaped arc at the toe of the reinforcing bar 4 is cut at a gentle angle at the center in the longitudinal direction, and its cross section is finished smoothly. The two separated pieces have the same diameter and the same angled end faces.
The set has cylindrical wedges 2 and 3.

A joint is formed by press-fitting wedges 2 and 3 from left, right or up and down into the circular space formed by the reinforcing bars 4 and 4 so that their inclined end surfaces contact each other. It is.

In this case, a slight positional error of the rebar is controlled by controlling the press-fitting of the wedges 2 and 3 so that the rebars are mutually connected. Also, the escape of the wedge is restricted by the filling of the concrete. If necessary, spot welding of the wedges 2 and 3 can be performed.

FIG. 3 shows a case where the U-shape of the toe of the reinforcing bar is expanded by the modification of FIG. 2, and FIG. 4 shows a case where a plurality of reinforcing bars are joined.

[0017]

As described above, the present invention does not increase the amount of rebar as in a lap joint, does not require a large-scale construction method like a welding joint, and does not require precision like a mechanical joint. Since the accuracy of the rebar processing can be absorbed by the press-fitting of the wedge, the cost is easy and the accuracy control is simplified. In addition, two wedges having inclined end surfaces having the same angle are configured to be pressed into the circular space formed at the toe end of the reinforcing bar by abutting the end surfaces on each other. By sliding, the wedge can smoothly and smoothly fill the inside of the circular space without fail, and more secure joining can be performed.

[Brief description of the drawings]

FIG. 1 (a) is a view showing a steel cylinder. (B) It is a figure which cut | disconnects the steel cylinder figure 1 (a) diagonally, and shows two pieces used as a wedge.

FIG. 2 (a) is a front view of an embodiment of the present invention. FIG. 3B is a side view of FIG.

FIG. 3 is an application example in a case where a U-shape is expanded.

FIG. 4 is a diagram illustrating joining of a plurality of reinforcing bars.

[Explanation of symbols]

 1 ... steel cylinder, 2 ... wedge, 3 ... wedge, 4 ... rebar.

Claims (1)

(57) [Claims] 1. A toe of a reinforcing bar to be joined is processed into a U-shape, and the toe processed into the U-shape is folded and overlapped to form a circular space. A rebar joint structure characterized in that two cylindrical wedges having the same inclined end surface having the same diameter are brought into contact with each other and press-fitted between the inclined end surfaces.