JP2993920B2 - Bar arrangement spacer and bar arrangement method using the spacer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing spacer used for arranging a welding wire mesh on a concrete placing surface for placing concrete. Further, the present invention relates to a reinforcing method using the reinforcing spacer.

[0002]

2. Description of the Related Art In recent years, slab construction methods have been developed for the purpose of streamlining construction, improving quality, and shortening the construction period. This slab method is a method of assembling columns, beams, walls, and the like, and then forming a floor slab using these as supporting bodies. In this method, a steel plate deck plate or the like is bridged over a steel beam as a formwork of a floor, and a reinforcing bar such as a wire mesh is laid on the bridged deck plate and concrete is poured.

FIG. 5 is a side view showing the inside of a slab by a conventional slab method. In the slab method, after deck plates 4 are bridged between the steel beams 2 to form a concrete casting surface, welding wire meshes 6 a and 6 b such as wire mesh are arranged on the deck plates 4. Each of the welding metal meshes 6a and 6b has a plurality of metal rods 8, 10
Are combined in a lattice and welded to each other. At the time of the above-described reinforcing arrangement, corrosion of the welded metal meshes 6a, 6b is prevented, and the cast concrete and the welded metal meshes 6a, 6b are prevented.
Fogging is required for the purpose of securing adhesion to b. The cover is the thickness of the concrete measured at the shortest distance between the rebar surface and the concrete surface 17, but in order to set the cover appropriately, the welding wire meshes 6a and 6b are set at an appropriate height from the deck plate 4. It is necessary to hold.

[0004] In order to meet such a demand, for example, the following method is adopted. First, a spacer 16 in which a plurality of inverted U-shaped reinforcing bars 14 are continuously fixed to a metal rod 12 having a length substantially equal to the length of one side of the welding wire meshes 6a and 6b so as to face one side is attached to the deck plate 4. It is arranged on the top so as to be almost parallel to each other. Next, after one welding wire mesh 6a is laid between the adjacent spacers 16, the welding wire mesh 6a
The other edge of the welded wire mesh 6b is placed on another spacer 16 while covering the edge of the wire mesh 6b with the edge of another welded wire mesh 6b by a required size. By performing such work continuously,
.. Are held at a required height from the deck plate 4 to obtain a necessary fogging amount.

[0005]

Incidentally, since the thickness dimension a of the slab to be formed is determined in advance by design, the fog b must be formed to satisfy the design dimension. However, according to the spacer 16 used in the above-described conventional slab method, the metal meshes 12 support the wire meshes 6a and 6b (that is, are supported by wires), so that the edges of the wire meshes 6a and 6b are mutually connected. It is necessary to overlap. Then, the welding wire meshes 6a, 6b
.. Overlap with each other on the spacer 16, so that the overlapping portion has an extra thickness in the vertical direction. For this reason, there is a problem that the fogging b is apt to be insufficient particularly at the overlapping portion of the welding metal nets 6a, 6b. .. Must be arranged while partially overlapping each other with the welding wire meshes 6a, 6b..., So that a welding wire mesh more than the actual area of the slab to be constructed is required, resulting in an increase in cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and eliminates overlap between welded metal meshes arranged adjacent to each other, and always properly covers a welded metal mesh arranged on a concrete casting surface. Can be secured,
It is an object of the present invention to provide a reinforcement arrangement spacer capable of reducing costs during slab construction and a reinforcement arrangement method using the arrangement spacer.

[0007]

SUMMARY OF THE INVENTION The present invention, in order to achieve the above object, is a reinforcing spacer for use in arranging a welding wire mesh on a concrete placing surface for placing concrete. At least two longitudinal streaks that are substantially parallel to each other and a horizontal streak shorter than the streaks that fix the streak to each other so as to have a predetermined width, and each of the welded metal meshes arranged adjacent to each other are opposed to each other. A wire mesh supporting portion having a predetermined width that can be supported from below with the edges to be made substantially the same horizontal position as each other, and a spacer portion that holds the wire mesh supporting portion at a predetermined distance from the concrete casting surface. Provided is a spacer for reinforcing bars, comprising:

When arranging a reinforcing wire mesh on a concrete placing surface, first, a plurality of reinforcing metal spacers of the present invention are arranged substantially in parallel on the concrete placing surface, for example, at a required interval from each other. Are arranged as follows. In this case, the adjacent reinforcing bar spacers are arranged such that the distance between the opposing edges of the wire mesh supporting portion is slightly smaller than the width (length) of the welding wire mesh bridged between the wire mesh supporting portions. You. Thereafter, one welded wire mesh is placed between a pair of adjacent reinforcing spacers, and then between one of the pair of reinforcing spacers and another adjacent reinforcing spacer. Another welding wire mesh is placed. In this case, according to the reinforcing wire spacer of the present invention, the edges of the welded metal mesh arranged adjacent to each other are supported by the metal mesh supporting portion (that is, supported by the surface).
Since the opposing edges can be positioned at substantially the same horizontal position so that they do not overlap each other, problems such as a shortage of the fogging amount at the overlapping portion, which are likely to occur in the conventional slab method, can be solved. Be improved.

In the present invention, for example, when a steel plate deck plate bridged between steel beams is subjected to a slab method as a concrete placement surface, a wire mesh or the like is used as a welding wire mesh, and the wire mesh is placed on the concrete placement surface. Can be held at a predetermined distance from the camera. In the present invention, the width of the wire mesh supporting portion is not particularly limited, but the width is such that the welding wire meshes whose edges are respectively supported on both sides at the center in the width direction of the wire mesh supporting portion are surely not dropped. It is sufficient that the width is such that it is held. Further, in the present invention, the spacer portion can be made of an iron material or a mortar material having a predetermined strength.

It is preferable that the wire mesh supporting portion is vertically elongated by at least two vertical streaks substantially parallel to each other and a horizontal streak shorter than the vertical streaks fixing the vertical streaks so as to have a predetermined width. . In this case, the wire mesh support portion can be easily formed by appropriately combining the reinforcing bars, so that it is possible to easily produce the reinforcing bar spacer on site, and furthermore, the space between the vertical bars and the horizontal bars. Since a moderate gap is formed in the concrete, the concrete can be poured smoothly without obstructing the flow of the concrete.

The spacer portion only needs to be able to hold the wire mesh supporting portion at a predetermined distance from the concrete casting surface, and the fixing position with respect to the wire mesh supporting portion is not particularly limited, but the fixing position is in the longitudinal direction of the wire mesh supporting portion. The lower surfaces at both ends are preferable in that the spacer for reinforcing bars can be stably placed on the concrete casting surface. Further, in addition to the spacers fixed to the lower surfaces of both ends of the wire mesh supporting portion, another spacer portion can be fixed between the wire mesh supporting portions as necessary. In this case, a reinforcing member spacer of a desired size can be easily manufactured simply by fixing the spacer member to a wire mesh supporting portion formed by vertical and horizontal streaks of a desired length.

The present invention also relates to a method for arranging reinforcing bars using the spacer for arranging reinforcing bars of the present invention, wherein a plurality of the spacers for arranging reinforcing bars maintain a required relationship with each other on a concrete placing surface. And a step of placing a welding wire mesh on the wire mesh support portion of each of the reinforcing wire spacers such that respective edges face each other. I will provide a.

In the reinforcing method of the present invention, first, a plurality of reinforcing spacers are arranged on the concrete placing surface so as to maintain a required relationship with each other. The width (length) of the welded wire mesh that spans the gap between the opposing edges of the wire mesh support portion of the reinforcing wire spacer between the wire mesh support portions.
Arrange so that it is slightly smaller. Next, a welded wire mesh is placed between adjacent reinforcing bar spacers such that the edge thereof is applied to the wire mesh supporting portion by an appropriate amount, and the welded wire mesh is similarly applied to other reinforcing wire spacers. Put on. By arranging the reinforcing bars in this manner, it is possible to prevent problems such as a shortage of fogging due to the overlapping of the welded meshes.

[0014]

FIG. 1 is a perspective view showing a reinforcing bar spacer according to an embodiment of the present invention, and FIG. 2 is a diagram showing a reinforcing metal wire (wire mesh) reinforcing bar using the reinforcing bar spacer of FIG. FIG. 3 is a side view showing the state, and FIG. 3 is a plan view showing the reinforcing arrangement state of FIG. Note that the present invention is not limited to this embodiment.

In FIG. 1, the reinforcing wire spacer 18 includes a vertically long wire mesh support portion 20 and two spacer portions 22 fixed to the lower surfaces of both ends of the wire mesh support portion 20, respectively.

The wire mesh supporting portion 20 includes three vertical stripes 24a, 24b, 24c arranged in parallel with each other, and vertical stripes 24a to 24c.
These vertical streaks 2 maintain a predetermined width (interval) with each other.
4a to 24c, and a plurality of horizontal streaks 26 welded to each other. The separation distance (width) between the vertical streaks 24a and the vertical streaks 24b and the separation distance between the vertical streaks 24b and the vertical streaks 24c are respectively set to dimensions that can support one edge of the welding wire meshes 6a and 6b to be supported without falling. ing. As shown in FIG. 2, the spacer portion 22 has a height capable of holding the welding wire meshes 6a and 6b at a predetermined height from the convex surface of the deck plate 4 when disposed on the convex surface of the deck plate 4. Is formed.

The operation of forming a slab using the reinforcing bar spacer 18 having the above structure is performed as follows. That is, as shown in FIG.
As a concrete casting surface. Next, the plurality of reinforcing bar spacers 18 are arranged on the deck plate 4 so as to be substantially parallel to each other with a predetermined space therebetween, and the welding wire mesh 6a,
6b ... one by one. In this case, the spacing between the edges of the wire mesh supporting portions 20 that oppose each other is equal to the width (length) of the welded wire meshes 6a, 6b,. It is arranged to be slightly smaller. After that, the welding wire meshes 6a, 6b,... Are sequentially placed between the adjacent reinforcing bar spacers 18 so that the respective edges overlap the half area of the wire mesh supporting portion 21 in the width direction.

Each of the welded metal meshes 6a, 6b,... Placed on each reinforcing arrangement spacer 18, as shown in FIG. 2 and FIG. Since the heights are at substantially the same horizontal position, the problem of insufficient fogging amount, which has occurred in the conventional slab method, is improved. Therefore, in the designed thickness dimension a of the slab, the fog b can be sufficiently taken.

In this embodiment, as shown in FIG. 2, since the horizontal streak 26 is located between the vertical streaks 24a to 24c and the spacer 22, the welded wire meshes 6a and 6b are provided at one edge. The fixed metal rod 10 is provided with a vertical streak 24a and a vertical streak 24b.
And the recess between the vertical stripes 24b and 24c. Such a configuration is equivalent to the welding wire mesh 6
This is preferable in that the metal rod 10 at one edge of each of the metal meshes a and 6b can be absorbed in the vertical direction, and the cover size above the welding wire meshes 6a and 6b can be increased. In the above-described reinforcing work, an example is shown in which the welding metal meshes 6a, 6b... Are arranged only in the left-right direction in the drawing. However, when the welding metal meshes 6a, 6b. The reinforcement arrangement spacers 18 are arranged as necessary so as to be orthogonal to the reinforcement arrangement spacers 18 previously arranged.

FIG. 4 shows the horizontal streaks 2 in the bar arrangement spacer 18.
FIG. 11 is a side view showing another example in which the vertical positions of the vertical stripes 6 and the vertical stripes 24a to 24c are reversed. Reinforcing bar spacer 1 of this example
8, as shown in FIG.
The metal bar 10 at each edge of 6b is not absorbed in the up-down direction, and the size in the up-down direction is larger than that in the above-described example shown in FIG. However, even in this case, since the edges of the adjacent welded metal meshes 6a and 6b do not overlap, the cover b above the welded metal meshes 6a and 6b is sufficiently removed as compared with the conventional slab method described with reference to FIG. Can be secured.

[0021]

As described above, according to the reinforcing-bar spacer and the reinforcing-arrangement method using the reinforcing-bar spacer according to the present invention, it is possible to eliminate the overlap between adjacent welded metal meshes. As a result, it is possible to always properly cover the welding wire mesh to be arranged on the concrete placing surface, and to reduce the cost at the time of slab construction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a reinforcement arrangement spacer according to one embodiment of the present invention.

FIG. 2 is a side view showing a state in which a welding wire mesh such as a wire mesh is arranged using a reinforcing spacer.

FIG. 3 is a plan view showing a bar arrangement state of FIG. 2;

FIG. 4 is a side view showing another example in which the vertical lines and the horizontal lines of the reinforcing-arrangement spacer according to the present invention are configured upside down.

FIG. 5 is a side view showing the inside of a slab by a conventional slab method.

[Explanation of symbols]

 4 Deck Plate 6a Welding Wire Mesh 6b Welding Wire 18 Spacer for Arranging Bars 20 Wire Mesh Support 22 Spacer 24a Vertical Bar 24b Vertical Bar 24c Vertical Bar 26 Horizontal Bar

Claims (2)

(57) [Claims] Claims: 1. A reinforcing bar spacer used for arranging a welding wire mesh on a concrete casting surface on which concrete is cast, comprising at least two vertical bars substantially parallel to each other; It is constituted vertically long by a horizontal streak shorter than the vertical streak which is fixed to have a predetermined width mutually, and a lower portion is formed in a state in which opposing edges of each of the welded metal meshes arranged adjacent to each other are at substantially the same horizontal position as each other. A wire mesh support portion having a predetermined width capable of supporting the wire mesh support portion, and a spacer portion for holding the wire mesh support portion at a predetermined distance from a concrete casting surface. 2. A reinforcing method using a reinforcing-bar spacer according to claim 1, wherein a plurality of the reinforcing-bar spacers are maintained in a required relationship with each other on a concrete placing surface. And a step of placing a welded wire mesh on the wire mesh support portion of each of the reinforcing wire spacers such that the respective edges face each other.