JPH0633074Y2 - Reinforcing wire mesh for concrete structures - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a wire mesh used for embedding and reinforcing in concrete when building a concrete structure.

[Prior art and its problems] In the case of a welded wire net to be buried for reinforcement when building a concrete structure, iron wires or steel bars are generally arranged vertically and horizontally at regular intervals, and the intersections thereof are polymerized, The overlapping part is joined by welding.

In such a welded wire mesh, the overlapping portion of the crossed iron wires or steel bars has a thickness twice the thickness of the iron wire or steel bars, and the thickness of the entire welded wire mesh also becomes that thickness.

Therefore, this is a concrete slab, a concrete column,
When used for building concrete beams, concrete walls, etc.,
In order to secure a sufficient cover thickness for concrete such as iron wire, the amount of concrete to be cast on the outer surface must be increased by the thickness of the iron wire or steel bar.

In a concrete-reinforced welded wire mesh, as a technology that can reduce the casting amount of the whole concrete after securing the concrete cover thickness, the cross section of the steel bar is formed into an elliptical shape, and the short diameter part of this steel bar is the thickness of the wire mesh. Welded in an array by crossing so as to face the vertical direction.
(Actual No. Sho 60-73713) A flat part is formed in the middle of a reinforcing bar, and other reinforcing bars are crossed and welded to this flat part. (Japanese Patent Publication No. 58-17863) has been proposed.

However, although these welding wire meshes reduce the amount of concrete to a certain extent, in the above, the amount is very small, and in one of them, one of the reinforcing bars is a flat part and becomes thin, so the welding point at the crossing part is It is unavoidable that the shearing force at the point decreases.

Further, when the reinforcing welded wire mesh is bent to be placed on the outer or inner corners of the concrete structure, the welded cross-polymerized portion near the bent portion may be peeled off. May occur. When the above-mentioned reinforcement welding wire mesh is buried in a concrete pavement part such as a parking lot, an excessive load is applied to the pavement surface due to traveling parking of a large vehicle, and the cross-overlapped part where the reinforcement welding wire mesh embedded inside is frequently bent and welded. May peel off, fail to reinforce, and crack concrete pavement surface. Further, when the above-mentioned reinforcing welded wire mesh is used as a reinforcing material for the corner portion of the reinforced concrete wall opening, not only is the wall thickness increased, but also the tensile strength and compressive strength in the plane direction are not sufficient, so in the corner portion of the reinforced concrete wall opening It was not possible to prevent the occurrence of cracks.

[Purpose of Invention] The present invention has been made to solve the above problems.
An object of the present invention is to provide a reinforcing wire net for a concrete structure, which has an intersecting portion of an iron wire having the same thickness as the thickness of the iron wire, and the intersecting iron wire is shown on the same plane as the intersecting portion.

[Means for Solving Problems] A reinforcing wire mesh for a concrete structure according to the present invention for solving the above problems includes a plurality of iron wires arranged at intervals.
In a reinforcing wire net for a concrete structure, which is formed by a plurality of iron wires intersecting the iron wire and spaced apart from each other, the intersecting portions of the iron wires are melt-integrated and the upper surface of each of the intersecting portions is It is located on the same plane as the upper surface of the iron wire, and the lower surface of the intersecting portion is located on the same plane as the lower surface of each iron wire.

[Operation] As described above, the reinforcing wire net for a concrete structure of the present invention has both the front and back surfaces of the iron wire on the same plane as the front and back surfaces of the intersection, and the intersection has the same thickness as the thickness of the iron wire. ， When used to construct concrete pillars, concrete beams, concrete walls, etc., the amount of concrete placed can be reduced by the thickness of the iron wire compared to the conventional method. Therefore, the cover thickness of the concrete from the top of the concrete layer to the reinforcing wire mesh increases, and in the case of a thin concrete slab,
Reinforcing bar efficiency for bending moment is improved.

In addition, since the reinforcing wire net for concrete structure of the present invention is used by being bent to be placed on the outer or inner corners of the concrete structure, the crossing part where the iron wires are melt-bonded is never peeled off. The corner portion in which this is embedded is reinforced so that cracking does not occur unlike the conventional case. Further, when the reinforcing wire mesh for concrete structure of the present invention is embedded in a concrete pavement part such as a parking lot, an excessive load is applied to the pavement surface due to running and parking of a large vehicle,
Even if the wire mesh embedded inside is frequently bent, the crossing portion of the iron wire is not peeled off, and the wire is sufficiently reinforced so that the concrete pavement surface is not cracked. When the reinforcing wire mesh of the present invention is used as a reinforcing material for the corner portion of the opening of a reinforced concrete wall, the wall thickness can be reduced and the iron wires intersecting on the front and back sides are the same plane, and the intersecting iron wires are melt-bonded in the entire cross section. Since the tensile strength and the compressive strength in the plane direction are several times stronger than that of the conventional welded wire mesh, the cracks can be reliably prevented from being generated at the corners of the opening of the reinforced concrete wall.

[Embodiment] An embodiment of a reinforcing wire net for a reinforced concrete structure according to the present invention will be described with reference to FIG.
A rectangular shape is formed by arranging in a horizontal and vertical arrangement at 70 mm intervals, and the crossing portions 2 are fused and integrated so that the thickness is the same as the thickness of the iron wire 1 and both the front and back surfaces are the same thickness as the front and back surfaces of the iron wire 1. The reinforcing wire mesh 3 of the lattice is formed.

In another embodiment shown in FIG. 2, an iron wire 1'having a diameter of 10 mm and having a diameter of 10 mm, which has a thread groove 4 engraved on the outer periphery to improve the adhesion of concrete, is 80 mm
A rectangular lattice in which the crossing portions 2 are arranged vertically and horizontally at intervals, and the crossing portions 2 are fused and integrated so that the thickness is the same as the thickness of the iron wire 1 and both the front and back surfaces are the same thickness as the front and back surfaces of the iron wire 1. The reinforcing wire mesh 3'is formed.

As shown in the above embodiments, in the reinforcing wire nets 3 and 3'for concrete structures of the present invention, both the front and back surfaces of the intersection 2 and the front and back surfaces of the iron wire 1 are on the same plane, and the intersection 2 is the iron wire. Since it has the same thickness as that of 1, 1 ', when it is used to construct concrete slabs, concrete columns, concrete beams, and concrete walls, the amount of concrete placed is 1
It can be reduced by 1'thickness. Therefore, as shown in FIG. 3, for example, when the reinforcing wire net 3 of FIG. 1 is used for the reinforced concrete slab 5, the cover thickness from the upper end surface of the concrete layer to the reinforcing wire net 3 becomes large, and in the case of a thin concrete slab, especially the reinforcing bar against bending moment Efficiency is improved.

Further, even if the reinforcing wire mesh 3 is bent at a right angle as shown in FIG. 4 in order to dispose the reinforcing wire mesh 3 at the outer corner portion of the concrete structure, the crossing portion 2 in which the iron wires 1 are melt-bonded to each other is never peeled off. Since it does not exist, the outer corner portion 7 of the concrete structure 6 embedded as shown in FIG.
Is fully reinforced and does not crack.

Further, when the reinforcing wire mesh 3 is buried in the concrete pavement part 8 such as a parking lot as shown in FIG. 6, an excessive load is repeatedly applied to the pavement surface 8a due to running and parking of a large vehicle, and the internal reinforcing wire mesh 3 is frequently used. However, since the crossing portion 2 of the iron wire 1 is not peeled off and is sufficiently reinforced, the concrete pavement surface 8a is not cracked.

Further, as shown in FIG. 7, the above-mentioned reinforcing wire netting 3 is used as a reinforcing material in the corner portion 11 of the opening 10 of the reinforced concrete wall 9 in the portions A and B.
When cut and used like the parts C and C, the wall thickness of the part can be made thin, and the iron wire 1 intersecting on both front and back sides is on the same plane, and the iron wire 1 is melted and joined at the intersection 2 to be integrated. Therefore, the tensile strength and the compressive strength in the plane direction are several times stronger than those of the conventional molten metal net, so that the corner portion 11 of the opening 10 of the reinforced concrete wall 9 is not cracked. Further, when the reinforcing wire net 3 is used as a reinforcing bar when the sleeve 13 is penetrated through the beam 12 as shown in FIG. 8, cracks do not occur in the penetrating portion of the sleeve 13.

Further, the reinforcing wire mesh 3 can be used as a shear reinforcing bar when used for a concrete column (or a concrete beam) 14 as shown in FIG. 9, in which case the reinforcing wire mesh 3 is bent and wound around the main bar 15 to form a cylinder. It can be formed into a strip shape or a groove shape.

The reinforcing wire nets 3 and 3'of the above-mentioned embodiment are circular iron wires 1,
1 ', but not limited to this, a square line or an elliptical line may be used. Further, the outer peripheral surface is not limited to the thread groove 4 and may have irregularities of other shapes. Also, bar steel may be used instead of iron wire.

Further, the reinforcing wire nets 3 and 3'in the above-mentioned embodiment are square lattices, but not limited to this, triangular lattices, pentagonal lattices,
It may be a hexagonal lattice, a rhombic lattice, or the like.

[Effects of the Invention] As can be seen from the above description, in the reinforcing wire net for a concrete structure of the present invention, both the front and back surfaces of the crossover portion of the iron wire and the front and back surfaces of the iron wire are on the same plane, and the crossover portion corresponds to the thickness of the iron wire. Since the thickness is the same, the amount of concrete placed can be reduced when building a concrete structure. In addition, since the intersecting part of the iron wire is melt-bonded and integrated, the intersecting part does not peel off even when bent, and the tensile strength and compressive strength in the plane direction are extremely high, so it can be used to reinforce each part of a concrete structure. The effect of preventing the occurrence of cracks is obtained.

[Brief description of drawings]

1 and 2 are partial perspective views showing a reinforcing wire net for a concrete structure of the present invention, and FIG. 3 is a partial vertical sectional view of a concrete slab made using the reinforcing wire net of FIG. 1, 4 1 is a perspective view showing a state where the reinforcing wire mesh of FIG. 1 is bent at a right angle, and FIG. 5 is a partially cutaway perspective view showing a state where the reinforcing wire mesh of FIG. 4 is embedded in an outer corner portion of a concrete structure, 6 is a partially broken perspective view showing a state in which the reinforcing wire mesh of FIG. 1 is embedded in a concrete pavement part such as a parking lot, and FIG. 7 is a reinforcing material of the reinforcing wire mesh of FIG. 1 at a corner portion of an opening of a reinforced concrete wall. Fig. 8 is a diagram showing an example in which the reinforcing wire net of Fig. 1 is used as a reinforcing bar of a sleeve penetrating portion when a sleeve is penetrated through a beam, and Fig. 9 is a concrete column. It is a figure which shows the case where the reinforcement wire net of FIG. 1 is used as a shear reinforcement. 1, 1 '... Iron wire, 2 ... Crossing part, 3, 3' ... Reinforcing wire mesh

Claims (1)

[Scope of utility model registration request] 1. A reinforcing wire net for a concrete structure, comprising a plurality of iron wires arranged at intervals and a plurality of iron wires arranged at intervals so as to intersect with the iron wires,
The intersecting portions of the iron wires are fused and integrated so that the upper surfaces of the intersecting portions are located on the same plane as the upper surfaces of the respective iron wires, and the lower surfaces of the intersecting portions are located on the same plane as the lower surfaces of the respective iron wires. Reinforcing wire mesh for concrete structures.