JPH11310988A - Solid-welded wire gauze and adopted precast concrete panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-welded wire gauze, cost of which is reduced and which is manufactured easily, and a precast concrete panel, in which the welded wire gauze is put to practical use effectively. SOLUTION: The solid-welded wire gauze is composed of main reinforcements 1 zigzag arrayed in parallel at regular intervals and ties 2, which are arranged at right angles with the main reinforcements 1, by which the adjacent each main reinforcement 1 is bent so as to keep intervals in the vertical direction and which are crossed and welded so as to be placed on the outsides of the main reinforcements 1. In the precast concrete panel, main reinforcement rows on one sides of the solid-welded wire gauzes are buried, and the main reinforcement rows and ties 2 on the other sides of the solid-welded wire gauzes are projected to the outside of the concrete panel intermittently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a welded wire mesh,
In particular, the present invention relates to a three-dimensional welded wire mesh formed by connecting a main reinforcing bar and a connecting bar to reduce costs, and a precast concrete panel effectively utilizing the mesh.

[0002]

2. Description of the Related Art Welded wire mesh has been used in large quantities at sites where concrete works such as continuous underground walls and underground beams are performed. The price of the entire construction was often determined by the level of the manufacturing cost of the welded wire mesh. In recent years, in order to speed up concrete work and shorten the construction period, precast concrete panels are often used, and in this field, use of welded wire mesh is increasing. There is an increasing demand for wire mesh cost reduction. However, the conventional welded wire mesh used for precast concrete panels and the like is three-dimensional using spot welding to connect the wire mesh and the reinforcing steel, and has been expensive.

[0003]

SUMMARY OF THE INVENTION In view of the present situation where the manufacturing cost of a three-dimensional welded wire mesh substantially determines the manufacturing cost of a precast concrete panel or the like, the present invention provides a three-dimensional welded wire that is inexpensive and easy to manufacture. It is an object of the present invention to provide a wire mesh, a method of manufacturing the same, and a precast concrete panel or the like that effectively utilizes the welded wire mesh.

[0004]

A three-dimensional welded wire mesh according to the present invention is arranged such that main bars arranged in a staggered manner in parallel at a predetermined interval and are arranged at right angles to the main bars so that adjacent main bars are vertically spaced from each other. It is composed of a connecting bar which is bent and crossed and welded so as to be located outside the main bar.
The manufacturing method is to arrange and weld half of the required main bars at a predetermined interval on a straight connecting bar, and then arrange the other half of the main bars in a staggered manner at a predetermined interval on the opposite side of the connecting bar. After welding, the connecting bars are bent so that the adjacent main bars maintain an interval in the vertical direction.
Further, in the precast concrete panel using the manufactured three-dimensional welded wire mesh, a main reinforcement row on one side of the three-dimensional welded wire mesh is buried inside a concrete plate and connected to a main reinforcement row on the other side outside the concrete plate. It is configured to intermittently project with the muscle.

[0005]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the three-dimensional welded metal mesh according to the present invention, as shown in FIG. 1, main bars 1 are arranged in a staggered manner at regular intervals in parallel with a direction perpendicular to the paper surface, and a connecting bar 2 is folded in a direction perpendicular to the main bar 1. It is arranged in a bent state. The connecting bars 2 are connected to the main bars 1 adjacent to each other.
Are arranged so as to keep a constant interval in the vertical direction as shown in the drawing, and when a force is externally applied to the three-dimensional welded metal mesh, the main reinforcing bar 1 is gathered in a direction converging on the connecting bar 2 in relation to the main reinforcing bar. Because it is located outside the main muscle. The connection between the main bar 1 and the connecting bar 2 is made by welding, but this has no special meaning.

Next, a method of manufacturing a three-dimensional welded metal mesh according to the present invention will be described with reference to FIG. As shown in FIG. 2A, the main reinforcing bar 1 is arranged in parallel on the connecting bar 2 in a straight state, and is fixed and connected to each other by spot welding 3 to form a welding wire net 4. The number and pitch of the main bars at this time are determined from the strength calculation required for the three-dimensional welded metal mesh, but at this stage, half of the required main bars 1 ′ are doubled in pitch. Have been placed. When the process proceeds to the stage shown in FIG. 2B, the welding wire mesh 4 produced in the stage shown in FIG. 2A is turned over, and the main reinforcing bar 1 'is placed on the lower side and the connecting bar 2 is placed on the upper side. Next, the required number of remaining main bars 1 "are arranged on the connecting bar 2 so as to be staggered on the opposite side to the main bar 1 'and located between the main bars 1', and are fixed and joined to each other by spot welding 3. 2 (c) shows a final shape stage of processing the welded wire mesh 5. The three-dimensional welded wire mesh 6 is connected to the joint 2
It is manufactured by forming the main bars 1 which are fixed in a zigzag and arranged in a line into a double-bar shape which is vertically spaced. The spacing between the main reinforcements 1 is determined by the required performance of the concrete plate to be applied.
This is done by bending. Therefore, the three-dimensional welded wire mesh 6
Production is extremely simple and accurate,
The production cost of the completed three-dimensional welded wire mesh can be greatly reduced as compared with the conventional one.

The three-dimensional welded wire mesh manufactured as described above is
It is used as a reinforcing steel bar for concrete works in various directions. However, when it is buried in a concrete plate and applied, the connecting bar 2 of the three-dimensional welded wire mesh 6 is moved to the center of the concrete plate when external force is applied. Since the main reinforcement is constrained from the outside in the direction of convergence, it can demonstrate the feature that it does not require any width stop bars for connecting and connecting the main reinforcements like the conventional three-dimensional welded wire mesh, so the finished concrete plate It becomes possible to set the manufacturing cost to a value that is reduced as compared with the conventional product.

Next, a case where the three-dimensional welded wire mesh 6 is applied to a precast concrete panel will be described. FIG.
As shown in the figure, the precast concrete panel 8
It is composed of a resin concrete plate 9 and a row of main reinforcing bars 1 'intermittently protruding from the resin concrete plate 9 and a connecting bar 2 for firmly connecting the concrete to the concrete to be cast at a construction site. I have. Further, a row of the main reinforcing bars 1 "and the connecting bars 2 are arranged substantially in the middle of the resin concrete plate 8 in the thickness direction.

Next, a method of manufacturing a precast concrete panel 8 using the three-dimensional welded metal mesh 6 according to the present invention will be described. As shown in FIG. 4, a three-dimensional welded metal mesh 6 formed as described above is placed in a concrete molding die frame 10, and then, as shown in FIG. In order to secure the desired length of the row of the main bars 1 'intermittently protruding from the plate 9 to the outside and the connecting bars 2, a spacing member 11 such as a styrofoam or fine aggregate is formed into a concrete forming form. After embedding in 10, an arbitrary release agent 12 is sprayed thereon.

FIG. 6 shows a spacing member 11 and a release agent 12.
This shows a state in which the resin concrete 13 is cast on the top. After a predetermined curing period has elapsed, the resin concrete board 9 is pulled out of the concrete forming formwork 10 to complete the production of the precast concrete panel 8 shown in FIG. At this time, the thickness of the resin concrete to be cast is desirably set at the center of the row of the main reinforcing bars 1 "and the connecting bars 2 of the three-dimensional welded metal mesh 6 in the resin concrete.

The precast concrete panel 1 can be manufactured by the method shown in FIGS. According to this method, as shown in FIG. 7, a resin concrete 13 is poured into a concrete forming form 10 so as to have a predetermined thickness, and the three-dimensional welding wire mesh 6 is placed before the concrete hardens. Push it into resin concrete 13. The pushing depth at this time is adjusted while considering that the row of the main reinforcing bar 1 ″ and the connecting bar 2 are located substantially in the middle of the resin concrete 13.

Further, after a lapse of a predetermined curing period, the resin concrete plate 9 is extracted from the concrete forming form 10 to complete the precast concrete panel 8 shown in FIG. Although the precast concrete panel 8 according to the present invention is completed through the various manufacturing steps as described above, the present invention is not limited to the above-described embodiment, and the resin concrete is usually made of resin concrete.ト may be used without departing from the spirit of the present invention.

[0013]

The three-dimensional welded metal mesh according to the present invention is arranged such that main bars arranged in parallel in a staggered manner at predetermined intervals and arranged at right angles to the main bars, and each adjacent main bar is bent so as to keep an interval in the vertical direction. In addition, it is composed of a connecting bar which is welded by being crossed so as to be located outside the main bar.As a manufacturing method, half of the necessary main bar is arranged at a predetermined interval on a linear connecting bar and welded. Then, after arranging the other half of the main reinforcing bars in a staggered manner at a predetermined interval on the opposite side of the connecting bar and welding, the connecting bars are bent so that the adjacent main bars maintain a vertical interval. It is possible to manufacture and provide a wire mesh and a wire mesh at a lower cost compared to a conventional case where a wire mesh and a wire mesh are spot-welded through a reinforcing bar to form a three-dimensional welded wire mesh. .

Further, in the precast concrete panel using the manufactured three-dimensional welded wire mesh, a main reinforcement row on one side of the three-dimensional welded wire mesh is embedded inside a concrete plate, and the other main reinforcement on the other side is placed outside the concrete plate. By forming the rows and the connecting bars to intermittently protrude, it is possible to provide an effect that the flat welding metal nets can be provided at a very low cost as compared with the conventional three-dimensional welding metal mesh obtained by welding the connecting metal bars with the connecting bars.

[Brief description of the drawings]

FIG. 1 shows a three-dimensional welded wire mesh according to the present invention.

FIG. 2 Manufacturing process of three-dimensional welded wire mesh

FIG. 3 shows a precast concrete panel according to the present invention.

FIG. 4 shows the same manufacturing process (arrangement of three-dimensional welded wire mesh)

FIG. 5: The same manufacturing process (arrangement of spacing material and release agent)

FIG. 6: The same manufacturing process (casting of resin cocrete)

FIG. 7: Manufacturing process by another method (casting of resin cocrete)

FIG. 8: Manufacturing process (embedding of three-dimensional welded wire mesh)

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main bar 2 Connecting bar 3 Spot welding 4, 5 Welding wire mesh 6 Solid welded wire mesh 8 Precast concrete panel 9 Resin concrete plate 10 Concrete forming formwork 11 Spacing agent 12 Release agent 13 Resin concrete

Claims (3)

[Claims] 1. Main bars arranged in a staggered manner in parallel at a predetermined interval, and adjacent main bars arranged at right angles to the main bars are bent so as to keep an interval in the vertical direction, and are positioned outside the main bars. Three-dimensional welded wire mesh consisting of connecting bars that are crossed and welded. 2. Half of the required main bars are arranged and welded on a straight connecting bar at a predetermined interval, and then the other half of the main bars are staggered at a predetermined interval on the opposite side of the connecting bar. A three-dimensional welded wire mesh, wherein the connecting bars are bent so that the adjacent main bars maintain an interval in the vertical direction. 3. A main bar arranged in parallel in a staggered manner at predetermined intervals inside a concrete plate, and adjacent main bars arranged at right angles to the main bar are bent so as to keep an interval in the vertical direction, and A main reinforcement row on one side of a three-dimensional welded wire mesh composed of a connecting bar crossed and welded so as to be located outside the main rebar is buried and connected to the other main rebar row on the other side of the three-dimensional welded wire mesh outside the concrete plate. Precast concrete panels that intermittently project from the streaks.