JPH11210167A - Spacer for reinforcing bar cage and manufacture of reinforcing bar cage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely fix reinforcing bars without requiring welding by arranging bending pieces to be caulked to the reinforcing bars at both end sections of a spacer connecting reinforcing bar mats formed by welding the reinforcing bars into a lattice shape. SOLUTION: The folding portions of the bending pieces 2 arranged at both end sections of a spacer main body 1 are closely hooked on the main reinforcements 7 of an opening section 10 structure, and the bending pieces 2 are folded and caulked on the main reinforcements 7. The outside of one of the folding pieces 6 arranged at both side sections of the spacer main body 1 is allowed to abut to auxiliary reinforcements 8, and a spacer S is arranged on the main reinforcements 7. The work environment is improved, the fitting device of the spacer S is simplified and miniaturized, and a maintenance property is facilitated. The spacer S can be stably connected to reinforcing bar mats 9 regardless of the fluctuation of voltage. The fitting/fixing position of the spring type spacer S is made stationary, and the quality of a reinforcing bar cage itself can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar mainly formed by welding a plurality of long reinforcing bars (hereinafter referred to as main bars) and a plurality of short reinforcing bars (hereinafter referred to as secondary bars) in a lattice shape. The present invention relates to a reinforcing cage basket spacer for connecting between open reinforcing bars (hereinafter referred to as an opening) of a reinforcing cage formed by bending a mat into a substantially U-shape, and a reinforcing cage manufacturing method using the spacer.

[0002]

2. Description of the Related Art Reinforcing bars, which are buried as reinforcements in concrete structures, particularly lightweight autoclaved concrete (hereinafter referred to as ALC) panels, have conventionally been made, for example, by welding a main bar and a sub bar in a grid pattern. It is manufactured by bending a reinforcing bar mat into a substantially U-shape so as to face each other at a predetermined interval, and connecting the open openings with a spacer. Conventionally, such spacers have been attached mainly by welding.

[0003]

However, when the spacers are connected by welding, there is a problem in the stability of the joining quality due to voltage fluctuations and the like, and also in the working environment due to scattering of welding chips and the like. . In addition, there is a so-called spring type spacer which is attached to the main reinforcing bar by utilizing the elasticity of the spacer itself instead of welding, but in this case, there is a possibility that a displacement may occur at the time of mortar injection. There was a lack of certainty in fixing the. Therefore, the present invention provides a spacer for a reinforcing rod cage that can be securely fixed without welding.
It is an object of the present invention to provide a method for manufacturing a reinforcing rod cage using the spacer.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention first provides a spacer for a reinforcing cage as described below. That is, it is a spacer for connecting between reinforcing bar mats formed by welding reinforcing bars in a lattice shape, and a bent piece which is caulked to a reinforcing bar is formed at both ends of the spacer. It is a spacer. Further, a hole is formed in the main body of the spacer,
A bent piece is formed on both sides of the spacer. And the following rebar basket manufacturing method is provided. That is, a method of manufacturing a reinforcing bar cage by connecting reinforcing bar mats formed by welding reinforcing bars in a lattice shape with the reinforcing bar cage spacer, wherein bent pieces formed at both ends of the spacer are locked to the reinforcing bar. And bending and bending the bent piece so as to be wound around a reinforcing bar.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on examples shown in the drawings. FIG. 1 is a schematic perspective view showing a state in which a spacer is attached to an opening of a reinforcing bar mat bent in a substantially U shape, FIG. 2 is a plan view of the spacer, and FIG. 3 is a side view of the same. FIG. 4 is a schematic side sectional view showing how to attach a spacer. As shown in FIG. 1, for example, a reinforcing bar mat (9) formed by welding a plurality of main bars (7) and a plurality of sub-bars (8) in a grid pattern is substantially U. The spacer (S) according to the present invention is used for connecting the main bars (7) constituting the opening (10) thereof to each other, and the spacer (S) according to the present invention is a flat spacer.

As shown in FIGS. 2 and 3, a bent piece (2) formed by being bent at about 90 degrees in the same direction is provided at both ends on the short side of the spacer body (1). The bent portion (3) of the bent piece (2) is formed in a substantially arc-shaped cross section so as to be locked with a small gap to the main bar (7). And, as described later, the bent piece (2) is extended to a length that can be tightly wound around the main bar (7) and swaged. Also, three square holes are drilled in the spacer body (1),
The central hole (4) is an insertion hole for a set rod (not shown) for holding a reinforcing rod cage, and the holes (5) on both sides are air (bubble) vent holes for ALC. Although the center hole (4) shown is slightly smaller than the holes (5) on both sides, the size and shape of these holes (4) (5) are not limited to those shown. Absent. On both sides of the long side of the spacer body (1) where the bent piece (2) is not provided, the spacer body (1) is bent by about 90 degrees in the same direction as the bent piece (2) to extend in the longitudinal direction of the body (1). A bent piece (6) formed in an elongated rib shape is provided to enhance the strength of the spacer itself. The height (h) of the bent piece (6) may be lower than the height (H) of the bent piece (2) before being wound around the main bar (7) and swaged.

The above-mentioned spacer (S) is attached to the main reinforcing bar (7) constituting the opening (10) of the reinforcing bar mat (9) to manufacture a reinforcing bar cage. The mounting method is as follows. That is,
As shown in FIG. 4, the bent portions (3) of the bent pieces (2) provided at both ends of the spacer body (1) are engaged with the main reinforcement (7) constituting the opening (10) with a small gap. The bent piece (2) is bent and swaged so as to be tightly wound around the main bar (7). Note that, at the time of locking at this time, one outer side of the bent piece (6) provided on both sides of the spacer body (1) is brought into contact with the auxiliary bar (8) as shown in FIG. When the spacer (S) is attached to the main bar (7) in this manner, the working environment is improved because a welding tip is not generated unlike the related art, and the apparatus and the like for attaching the spacer are simplified and downsized. Easy maintenance. In addition, since it is not related to voltage fluctuations, the stability of the joint of the spacer to the reinforcing bar mat is generated, and there is no possibility that the mounting and fixing position will change like the spring type spacer, so the quality of the reinforcing bar cage itself will be improved I do.

[0008] In any case, the present invention relates to the main muscle (7).
A bent piece (2) to be swaged to the main reinforcing bar (7) is formed at both ends of a flat spacer (S) connecting the reinforcing bar mat (9) formed by welding the reinforcing bar (8) and the reinforcing bar (8) in a lattice shape. And a spacer (S)
Holes (4) and (5) are drilled in the main body (1), and bent pieces (6) are formed on both sides of the spacer (S). (S) is used to manufacture a reinforced cage. That is, the bent pieces (2) formed at both ends of the spacer (S) are locked to the main reinforcement (7), and the bent pieces (2) are bent and crimped so as to be wound around the main reinforcement (7). The spacer (S) can be attached and fixed to the main bar (7). The present invention is not limited to those shown in the drawings, but can be appropriately changed in design within the spirit of the present invention.

[0009]

According to the present invention, the spacer can be securely attached and fixed without welding the spacer between the reinforcing bar mats. Therefore, unlike the conventional case, the welding tip does not scatter, the working environment is improved, and the device for attaching the spacer can be simplified, so that the maintenance becomes easier. In addition, since it is not related to the fluctuation of the voltage, the joining of the spacer to the reinforcing bar mat is also stabilized, and the quality of the reinforcing bar itself is improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a state in which a spacer is attached to an opening of a reinforcing bar mat.

FIG. 2 is a plan view of a spacer.

FIG. 3 is a side view of the above.

FIG. 4 is a schematic side sectional view showing how to attach a spacer.

[Explanation of symbols]

 S Spacer 1 Body 2 Bending piece 3 Bending part 4 Hole 5 Hole 6 Bending piece 7 Main bar 8 Secondary bar 9 Rebar mat 10 Opening

Claims (4)

[Claims] A spacer (S) for connecting rebar mats (9) formed by welding rebars (7, 8) in a grid pattern, wherein both ends of the spacer (S) are provided with rebars ( 7)
A rebar cage spacer, wherein a bent piece (2) to be swaged is formed. 2. The reinforcing cage according to claim 1, wherein holes (4, 5) are formed in the main body (1) of the spacer (S). 3. The bent piece (6) is formed on both sides of the spacer (S).
Or the spacer for reinforcing rod cage according to 2. 4. A reinforcing bar mat (9) formed by welding reinforcing bars (7, 8) in a grid pattern and connected by the reinforcing cage spacer (S) according to any one of claims 1 to 3. A method for manufacturing a basket, wherein bent pieces (2) formed at both ends of the spacer (S) are locked to a reinforcing bar (7),
A method for manufacturing a reinforcing bar cage, comprising bending and crimping the bent piece (2) around the reinforcing bar (7).