JP2542095Y2 - Wire mesh for floor slab - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire mesh for floor slabs, and more particularly to a wire mesh for floor slabs which is laid on a deck plate and forms a floor slab with concrete cast on the deck plate.

[0002]

2. Description of the Related Art Floor slabs, especially composite slabs made of concrete and a deck plate having no reinforcing steel bars,
A so-called composite slab deck plate is formed integrally with concrete, and the composite slab deck plate bears tensile force and concrete bears compressive force. In addition, when a floor slab wire mesh is used for such a composite slab, the floor slab wire mesh acts as a concrete shrinkage crack preventing line, and constitutes a reasonable and economic floor structure with excellent workability and proof strength. In recent years, wire mesh for floor slabs has been actively used in floor construction methods for buildings.

FIG. 11 is a plan view showing a conventional synthetic slab wire mesh (which is included in the floor slab wire mesh, but is referred to as a synthetic slab wire mesh for convenience). FIG. FIG. 13 is a perspective view showing a superimposed state of wire mesh.
Is a partially cutaway perspective view showing a composite slab using the same synthetic slab wire mesh, FIG. 14 is a cross-sectional view showing the same composite slab using the same synthetic slab wire mesh, and FIG. It is sectional drawing which shows a part.

In the drawing, reference numeral 1 denotes a plurality of reinforcing bars 1a each having a diameter of 6 mm, which are combined in a lattice shape, and whose crossing portions are welded or formed by other methods to have a vertical dimension of 1000 to 20.
It is a rectangular wire mesh main body having a width of 2000 mm and a width of 2000 to 4000 mm. 2 is a composite slab deck plate on which a plurality of wire mesh bodies 1 are laid, 3 is concrete cast on a composite slab deck plate 2 on which a plurality of wire mesh bodies 1 are laid, 4 is a synthetic slab deck plate 2 And 5 are spacers interposed between the composite slab deck plate 2 and the wire mesh main body 1.

[0005] In the construction of a composite slab using a conventional synthetic slab wire mesh, first, a composite slab deck plate 2 is provided on a plurality of beams 4 and the composite slab deck plate 2 is sized to a predetermined size. As shown in FIG. 12, four formed wire mesh main bodies 1 are overlapped at the edge of each wire mesh main body 1, and the overlapping portion 7 formed of the overlap margin 6 at the corner portion is formed into four sheets. And a wire mesh for synthetic slab of a fixed size is laid.

At this time, the synthetic slab deck plate 2
A spacer 5 is interposed between the wire mesh body 1 and the wire mesh body 1 so that the wire mesh body 1 is kept at a predetermined interval on the composite slab deck plate 2.

[0007] Next, on the composite slab deck plate 2, a predetermined slab thickness T and a predetermined cover thickness t are set.
Cast concrete 3 so that it can be removed. Then, the hardening of the concrete 3 causes the plurality of wire mesh bodies 1
A composite slab used as a floor of a building composed of a synthetic slab wire mesh, a composite slab deck plate 2 and concrete 3 is formed.

Such a composite slab has sufficient compressive strength and tensile strength such that the tensile stress is received by the composite slab deck plate 2 and the compressive stress is received by the concrete 3. The best one.

[0009]

In the conventional synthetic slab wire mesh described above, a plurality of rectangular wire mesh bodies 1 are superposed to form a synthetic slab wire mesh of a fixed size. At a corner portion of the wire netting body 1, an overlapping portion 7 is formed in which four overlapping margins 6 are overlapped.
However, there is a problem that a sufficient cover thickness t cannot be secured with respect to the slab thickness T because the thickness of the slab is large. That is,
For example, when a synthetic slab is formed using the wire mesh body 1 made of the reinforcing bar 1a having a diameter of 6 mm, if the slab thickness T of the synthetic slab is 50 to 100 mm, the cover thickness t is 3 mm.
0 mm is required, but the overlapping portion 7 of the four wire mesh bodies 1
As shown in FIG. 15, the thickness of the
When the slab thickness T is 50 mm, it is difficult to secure the cover thickness t.

Therefore, no spacer is used at the site, the corners of the wire mesh main body 1 are cut off, and the overlapping portion 7 of the wire mesh main body 1 is bent with the feet toward the synthetic slab deck plate 2 side. Although emergency measures were taken to secure the cover thickness t, such emergency measures were extremely troublesome work on site, and it was very difficult to perform correct construction.

In addition, if correct construction is to be performed without taking any emergency measures on site, the slab thickness T needs to be 80 mm or more, but this increases the amount of concrete to be cast and reduces construction costs. This created a new problem of rising.

Further, in order to secure the cover thickness t and to make the overlapping portion 7 thin, as shown in FIG. Although it is conceivable to adopt an arrangement in which 7 is formed, it is extremely troublesome to adopt a special arrangement on site.
Poor practicality.

The present invention has been made in order to solve such a problem, and it is possible to secure a sufficient cover thickness of a floor slab without requiring any emergency measures on site, to perform a correct construction efficiently and to reduce construction costs. It is an object of the present invention to obtain a floor slab wire mesh that can reduce the size of the concrete, prevent cracks in the concrete, and form a high-quality floor slab.

[0014]

SUMMARY OF THE INVENTION A floor slab wire mesh according to the present invention is laid on a deck plate, and a plurality of reinforcing bars are used in a floor slab wire mesh which forms a floor slab with concrete cast on the deck plate. A square notch is provided at one corner of a square wire mesh body configured in a lattice shape, and one side thereof is provided with a square notch of approximately overlap size, and at least one edge adjacent to the notch of the wire mesh main body is substantially separated from its edge. It is configured to bend at a bending position inside by the overlap margin size to form a bent step portion having a step.

[0015] A square wire mesh body formed by combining a plurality of rebars in a lattice shape is provided with a square notch having two sides substantially overlapping each other at two corners adjacent to each other. May be bent at a bending position that is substantially inwardly overlapped from the edge of the edge portion sandwiched between the edge portions to form a bent step portion having a step.

Further, in a wire mesh body having two notches,
In addition to the edge sandwiched between the two notches, a bent step having a step may be provided at the edge adjacent to the one notch.

[0017]

According to the present invention, a floor slab is formed because a square notch with one side substantially overlapping is provided at one corner of a rectangular wire mesh body formed by combining a plurality of reinforcing bars in a lattice shape. For this reason, when a plurality of wire mesh bodies are laid on the deck plate with overlapping margins at the edges thereof, for example, four wire mesh bodies are overlapped so as to be overlapped at corners of the wire mesh body. Since the notch provided at the corner of one wire mesh body is located at the overlap portion of the overlap margin formed at the corner portion of the above, the overlap portion has three overlap margins As a result, a sufficient cover thickness can be secured for the slab thickness, and proper construction can be easily performed.

Further, at least one edge portion adjacent to the cutout portion of the wire mesh main body is bent at a bending position inward from the edge by substantially the overlap margin to form a bent step portion having a step. Therefore, the positioning of the edge of the wire mesh main body to be superimposed on the edge where the bent step portion of the wire mesh main body is formed is facilitated, and the wire allowance for the floor slab wire mesh is secured to the deck plate. It becomes easy to lay properly.

Furthermore, by providing a square notch having two sides each having a substantially overlapping margin size at two corners adjacent to each other of the rectangular wire netting body, the four wire meshing bodies can be overlapped at the corners. The overlap portion of the margin is formed by two sheets and the thickness becomes thinner, so that it is easier to secure the cover thickness.

Further, a wire mesh body having two notches is provided with a bent step having a step at an edge adjacent to one notch in addition to an edge sandwiched between the two notches. With this arrangement, the positioning of the four wire netting bodies is further facilitated.

[0021]

1 is a plan view showing an embodiment of the present invention, FIG.
Is a left side view of the embodiment, FIG. 3 is a perspective view showing a superposed state of the embodiment, and FIG. 4 is a cross-sectional view showing a composite slab using the embodiment. In the figure, reference numeral 11 denotes a plurality of pieces having a diameter of 6
mm of reinforcing bars 11a are combined in a lattice shape, and the intersections are joined by welding or formed by other methods to form a vertical dimension of 100 mm.
A rectangular wire mesh main body of 0 to 2000 mm and a horizontal dimension of 2000 to 4000 mm. Reference numeral 12 denotes a side provided at one corner of the wire mesh main body 11, which is an overlap size, for example, 1 mesh + 50 mm.
The square notch 13 is bent at the bending position L inside the edge of the long side adjacent to the notch 12 of the wire netting body 11 by the overlap margin from the edge to form a step 14 of 6 mm. It is a bent step formed to have.

In the case of forming a composite slab using the composite slab wire mesh configured as described above, a plurality of wire mesh main bodies 11 formed to a predetermined size on the composite slab deck plate 2 are shown in FIG. As described above, the overlap margin 16 is provided at the edge of each wire netting body 1, and the overlapping portion 17 of the overlap margin 16 at the corner portion is overlapped so as to be four sheets. Then, the notch 12 formed at the corner of one wire mesh main body 11 is located in the overlapping portion 17,
The overlapping portion 17 is formed of three sheets, and the thickness is smaller than that of four sheets. That is, the thickness of the overlapping portion 17 of the four wire mesh main bodies 1 is 6 mm × 2 × 3 3
6 mm. Therefore, when the slab thickness T is 70 mm, 3
A cover thickness t of 0 mm can be sufficiently secured, and proper construction can be performed.

Further, the wire mesh main body 11 is bent so that a step 14 of 6 mm is provided at a bending position L at an edge of a long side adjacent to the notch 12 from the edge by an overlap margin dimension. Since the step portion 13 is formed, the edge of the wire netting body 11 to be superimposed on the edge of the wire netting body 11 having the bent step portion 13 is positioned at the step 14 of the bent step portion 13. It is easy if it is made to contact. Therefore, it is easy to properly lay the plurality of wire netting bodies 11 on the composite slab deck plate 2 by securing the overlap margin for each wire netting body 11, and the workability at the time of wire laying is improved.

When the concrete 3 is cast on the composite slab deck plate 2 on which the plurality of wire mesh bodies 11 are properly laid as described above, the wire mesh bodies 11 are bound together.
The concrete 3 is settled well, the disturbance at the time of concrete casting is reduced, and the wire mesh main body 11 functions sufficiently as a shrinkage crack preventing streak to prevent the concrete 3 from cracking.

FIG. 5 is a plan view showing another embodiment of the present invention, and FIG. 6 is a sectional view showing a composite slab using the embodiment. In this embodiment, a notch 12 is provided at one corner of the wire netting body 11, and two long and short sides adjacent to the notch 12 are bent inward from the edge by the overlap margin. It is bent at the position L to form a bent step 13 having a step 14 of 6 mm.

In this embodiment, the wire mesh main body 11 is
Has two bent steps 13 at two edges adjacent to the edge of the wire netting body 11, which overlaps not only the long edge but also the short edge of the wire netting body 11. Positioning of the part is facilitated.

FIG. 7 is a plan view showing still another embodiment of the present invention, FIG. 8 is a plan view showing a superposed state of the embodiment, and FIG. 9 is a sectional view showing a composite slab using the embodiment. It is.

In this embodiment, a square notch 1 is formed at each of two adjacent corners of a rectangular wire mesh body 11.
A bent step 13 having a step 14 of 6 mm is formed at the edge of the long side sandwiched between the notches 12, 12.

In this embodiment, since the square notches 12 are provided at two corners adjacent to each other in the wire mesh main body 11, the overlapping portions 17 in the corners of the four wire mesh bodies 11 are provided. Is made of two sheets, and the thickness becomes thinner. That is, as shown in FIG. 9, the thickness of the overlapping portion 17 of the four wire mesh main bodies 11 is 6 mm × 2 × 2 24 mm.
Becomes Therefore, when the slab thickness T is 60 mm, 30 mm
The cover thickness t can be sufficiently secured.

FIG. 10 is a plan view showing still another embodiment of the present invention. In this embodiment, a wire mesh main body 11 having two notches 12 is provided with two notches 12 and 12.
The bent step 13 is provided at the short edge adjacent to one notch in addition to the edge sandwiched between the notches. This also facilitates the positioning of the edge of the wire mesh main body 11 to be overlapped.

In the above-described embodiment, the wire netting body 11 has a rectangular shape, but may have a square shape.

[0032]

[Effects of the Invention] As described above, the present invention takes a synthetic slab as an example, and as described above, a square wire mesh is formed by combining a plurality of reinforcing bars in a grid shape, and one side of the square wire mesh body is substantially overlapped. Since notches are provided, when laying wire mesh for floor slabs on deck plates when constructing floor slabs, when four wire mesh bodies are overlapped at their edges at the edges, these wire mesh bodies are Since the notch provided at the corner of one wire mesh body is located at the overlapping part of the overlapping margin formed at the corner part of the above, the overlapping part has three overlapping margins and is thick. The thickness of the slab can be reduced, and a sufficient cover thickness can be ensured with respect to the slab thickness, so that there is an effect that no extra concrete is required, the construction cost is low, and proper construction can be easily performed.

Also, at least one edge portion adjacent to the cutout portion of the wire mesh main body is bent at a bending position inward from the edge by substantially the overlap margin to form a bent step portion having a step. As a result, it is easy to position the edge of the wire mesh main body to be overlapped with the edge where the bent step portion of the wire mesh main body is formed, and the workability of proper laying on the deck plate of the wire mesh for floor slab is improved. Construction cost is low, and when concrete is placed on the deck plate, the concrete is settled well, and the wire mesh body functions sufficiently as a shrinkage crack preventing streak to prevent concrete cracking, resulting in high quality. It has the effect of improving.

Furthermore, by providing a square notch with two sides each having a substantially overlapping margin size at each of two adjacent corner portions of the rectangular wire mesh main body, the overlap at the corners of the four wire mesh main bodies is provided. The joining portion has an effect that the thickness is made thinner by stacking two sheets, and it becomes easier to secure the cover thickness with respect to the slab thickness.

Further, a wire mesh body having two notches is provided with a bent step having a step at an edge adjacent to one notch in addition to an edge sandwiched between the two notches. With this configuration, the positioning of the four wire netting main bodies is further facilitated, and the effect of laying the wire netting for the floor slab on the deck plate is further improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a left side view of the embodiment.

FIG. 3 is a perspective view showing a superposed state of the embodiment.

FIG. 4 is a sectional view showing a composite slab using the same embodiment.

FIG. 5 is a plan view showing another embodiment of the present invention.

FIG. 6 is a sectional view showing a composite slab using the same embodiment.

FIG. 7 is a plan view showing still another embodiment of the present invention.

FIG. 8 is a plan view showing a superposed state of the embodiment.

FIG. 9 is a sectional view showing a composite slab using the same embodiment.

FIG. 10 is a plan view showing still another embodiment of the present invention.

FIG. 11 is a plan view showing a conventional synthetic slab wire mesh.

FIG. 12 is a perspective view showing a superimposed state of the synthetic slab wire mesh.

FIG. 13 is a partially cutaway perspective view showing a composite slab using the composite slab wire mesh.

FIG. 14 is a cross-sectional view showing a composite slab using the composite slab wire mesh.

FIG. 15 is a cross-sectional view showing an overlapping portion of the synthetic slab wire mesh.

FIG. 16 is a plan view showing an example of a three-layer arrangement of the synthetic slab wire mesh.

[Description of Signs] 11 Wire mesh main body 11a Reinforcing bar 12 Notch 13 Bending step 14 Step

Claims (3)

(57) [Scope of request for utility model registration] 1. A floor slab wire mesh which is laid on a deck plate and forms a floor slab with concrete cast on the deck plate, wherein a square wire mesh main body constituted by combining a plurality of reinforcing bars in a lattice shape. A notch of a square having a substantially overlap margin at one corner is provided, and at least one edge adjacent to the notch of the wire mesh main body is bent at a bending position inward from the edge by the overlap margin. A wire mesh for floor slabs, wherein a bent step portion having a step is formed. 2. A floor slab wire mesh which is laid on a deck plate and forms a floor slab with concrete cast on the deck plate, wherein a square wire mesh body formed by combining a plurality of reinforcing bars in a lattice shape. Two adjacent corners are provided with square cutouts, each side of which has a substantially overlap margin, and a fold sandwiched between these cutouts is substantially inwardly overlapped from the edge by the overlap margin. A wire mesh for floor slabs, wherein a bent step portion having a step is formed by bending at a position. 3. A wire mesh body having two notches,
3. A floor slab wire mesh according to claim 2, wherein a bent step having a step is provided at an edge adjacent to one notch in addition to the edge sandwiched between the two notches.