JPH0718207B2 - Rebar connecting jig - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reinforcing bar connecting jig for securely connecting intersecting reinforcing bars at an intersection with easy and stable quality.

[Prior Art] During the concrete placing operation of a reinforced concrete structure, it is necessary to arrange the reinforcing bars at the correct positions as shown in the design drawing and to fix them so that they do not move. This is because if the position of the reinforcing bar is deviated even slightly, the strength of the reinforced concrete structure is adversely affected and its durability is deteriorated.

In the prior art, in order to fix a plurality of intersecting reinforcing bars at the intersecting points, the intersecting points are joined by annealed iron wires or welded by spot welding.

However, the method of binding the points where the reinforcing bars intersect with annealed iron wires is performed manually, which is inefficient and requires skill to perform the work. The shortage of workers has become a serious problem in the construction industry.

On the other hand, in the method of directly spot-welding the reinforcing bar at the intersection instead of the binding work using the iron wire, it is difficult to perform good welding because the welding groove portion has a complicated shape. Further, it is known that when such spot welding is performed, there is a risk that the material of the reinforcing bar may be damaged, and in particular, there is a problem that the fatigue strength is significantly reduced (for example, "Concrete Standard Specification [Construction] Volume])).

Further, Japanese Utility Model Laid-Open No. 54-144917 discloses a jig which is connected to intersecting reinforcing bars by covering them. However,
According to such a known technique, it is only temporarily fixed, and the jig and the reinforcing bar cannot be firmly integrated.

Furthermore, Japanese Utility Model Publication No. 34-2632 discloses a joint fitting for connecting two reinforcing bars in the longitudinal direction. However, such a known technique cannot reliably integrate the crossed reinforcing bars.

[Problem to be solved] Therefore, an object of the present invention is to provide a reinforcing bar connecting jig capable of easily and reliably welding intersecting reinforcing bars to integrate them.

[Means for Solving the Problem] According to the present invention, in a reinforcing bar joining jig for joining intersecting reinforcing bars at the intersections, first and second planes having step portions corresponding to the steps of the intersecting reinforcing bars. And a concave portion in which the reinforcing bar is arranged is formed on the surface that contacts the reinforcing bar, a through hole is formed in each of the first and second flat surface portions, and a through hole is formed in the through hole. A welded portion is formed, a flux is provided around the through hole, and a concave step portion in which the welded portion is located is formed.

[Explanation of Action and Effect] Therefore, one of the reinforcing bars is covered with the recess formed on the back side of the first flat surface of the jig, and the other crossing bar is covered with the recess formed on the back side of the second flat surface. Since the first plane portion and the second plane portion have a step relative to the step of the reinforcing bars intersecting with each other, the jig and the two intersecting reinforcing bars are in close contact with each other while the jig is covered. Then, arc welding is performed by inserting the welding rod into the through hole, but since the flux is provided around the through hole, arc welding between the jig and the reinforcing bar can be reliably and easily performed.

Further, the stepped portion of the through hole forms a groove shape, and the welded portion is sufficiently adhered to obtain a firm weld.

In this way, the welded portion can be firmly formed between the reinforcing bar and the first and second flat portions of the jig, and two intersecting reinforcing bars can be reliably and firmly coupled.

Welding the reinforcing bar and the jig is easier than welding the reinforcing bars together, and the quality of the welded portion is also good.
Further, compared with the case of spot welding, the material itself of the jig and the reinforcing bar welded is relatively less damaged, and the fatigue strength is not reduced.

Further, in connection with the ease of welding the jig and the reinforcing bar, no skilled worker is required to perform the reinforcing bar joining work according to the present invention. When the present invention is carried out, the labor required for the work is greatly reduced as compared with the work of binding with the annealed iron wire, the work of spot welding, and the like.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 1, a metal reinforcing bar connecting jig 14 is installed at an intersection of two intersecting reinforcing bars 10 and 12. Here, the reinforcing bars 10 and 12 have a diameter of 6 mm or more.

Reinforcing bar connecting jig 14 is divided into two first parts by step 16.
And the second flat portions 18 and 20, and the dimension h of the step 16 is equal to the step of the reinforcing bars 10 and 12, that is, the diameter of the reinforcing bars. A surface opposite to the first and second flat portions 18 and 20,
That is, two orthogonal grooves, that is, recesses 24 and 26 are formed on the surface of the reinforcing bar connecting jig 14 that contacts the reinforcing bar. The reinforcing bar 10 is disposed in the recessed section 24 and the reinforcing bar 12 is placed in the recessed section 26.
Are arranged.

Then, as shown in FIG. 2, the first and second flat portions 18,
Through holes 40 and 42 are formed in the respective 20.

As shown in FIG. 3, a flux 50 is provided around each of the through holes so that no gap is created in the welded portion 44 as shown in FIG. Further, a stepped portion 56 is provided around any of the through holes so that the welded portion 44 is preferably overlaid.

As described above, according to the present invention, it is sufficient to simply insert the arc welding rod into the through hole to perform the welding work, and even an unskilled worker can perform a sufficiently firm welding work.

[Effects of the Invention] As described above, the present invention has the following excellent effects.

(I) The work efficiency can be improved by simply covering the jig and performing arc welding.

(Ii) Since the jig has the flux, the welding work can be performed smoothly.

(Iii) The groove can be formed by the step, and the weld can completely integrate the jig and the reinforcing bar.

(Iv) Even if not a skilled worker, reliable welding work can be performed.

(V) Therefore, the cost can be reduced, and the strength of the structure after the concrete is placed becomes good.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a place where crossed rebars are connected using the jig of the present invention, FIG. 2 is a plan view of the jig embodying the present invention, and FIG. 3 is VI- of FIG. Sectional view along line VI, No. 4
The drawing is a sectional view similar to FIG. 3 showing the relationship between the jig and the reinforcing bar after welding. 10, 12 …… Reinforcing bar, 14 …… Reinforcing bar connecting jig, 16 …… Step portion,
18, 20 …… Plane part, 22 …… Reinforcing bar connecting jig contact surface, 24, 26 …… Recessed through hole, 50 …… Flux,
56 ... Step

Claims (1)

[Claims] Claim: What is claimed is: 1. A reinforcing bar connecting jig for connecting intersecting reinforcing bars at intersections thereof, comprising first and second flat portions having step portions corresponding to steps of the intersecting reinforcing bars, and contacting the reinforcing bars. On the surface to be formed is formed a recess where the reinforcing bar is placed,
A through hole is formed in each of the first and second flat surface portions, a weld portion with the reinforcing bar is formed in the through hole, and a flux is provided around the through hole, and the welding is performed. A reinforcing bar joining jig, characterized in that a concave step portion where the portion is located is formed.