JPS5821054B2 - Reinforcement ties - Google Patents

Description

[Detailed Description of the Invention] When constructing reinforced concrete columns and beams, the present invention not only strengthens the columns and beams by fixing them to the main reinforcement, but also strongly restrains the concrete and has excellent shape retention. This relates to reinforcement ties.

Conventionally, this type of reinforcing hoop consists of only rectangular wire rods bent into an annular plane, which are fixed so as to be in contact with the outer circumferential surfaces of each of the main reinforcing bars that are erected. Many are arranged and used.

However, according to this method, since each stirrup is a loop made of a single wire, it is inferior in terms of concrete restraint, shape retention, etc., and this has been a big problem for those involved in construction.

The present invention was created in view of the problem of slanting, and its purpose is to combine and fasten a pair of hoops each having a polygonal planar shape of pentagon or more with two interior angles being right angles in a partially overlapping manner. To provide a reinforcing hoop that increases the contact area with concrete by forming a large number of internal sides, thereby ensuring its restraint and shape retention properties.

That is, the gist thereof is to form a hoop whose planar shape is a polygon of pentagon or more with at least two right angles by bending a wire material, This consists in the fact that the right angle portions are assembled and fixed in a partially overlapping manner so that the right angle portions are arranged around the periphery.

An embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1a, a hoop 1 is formed by bending a wire material and has a planar shape that is a polygon of at least two interior angles or a right-angled pentagon or more.

The hoop 1 has side edges 3 at both ends of a base 2, which are perpendicular to the base 2 through a right angle portion 6, and is symmetrical about the perpendicular bisector of the base 2.

Further, the oblique sides 4 connected to the side sides 3 are substantially perpendicular to each other.

Similarly, there is a hoop 1 shown in FIG. 1e having a base 2, sides 3 and hypotenuses 4.

Figures 1 and 2 are hexagonal hoops 1 having a base 2, side 3, hypotenuse 4, and top 5, all of which are symmetrical with respect to the perpendicular bisector of the base 2.

Figures C and d show a hexagonal hoop 1 whose two opposing corners are right angles, and is composed of side sides 3 forming each right angle and an oblique side 4 connected to the side sides 3.

A pair of pentagonal hoops 1 shown in FIG. , side 3
An external polygonal part 7 consisting of a polygonal part 7, and inside, a part of each side of both hoops 1 is a rectangular or more shape having an oblique side 4 which is oblique in a plane with respect to sides 2 and 3 of the external polygonal part 7. An internal polygonal portion 8 is formed.

That is, one hoop 1 is partially overlapped with the other hoop 1 so that the right angle portions 6 of both hoops 1 are arranged around it, so that the four hypotenuses 4 form a square inside. They are fixed by means such as welding or tying with wire.

In the embodiment shown in FIGS. 1 to 1F, two hoops 1 are combined to form a square shape, and inside each hoop 1 there are formed a side edge 3, an oblique edge 4, and an upper edge 5. to form a square or hexagon.

What is shown by imaginary lines in each figure in FIG. 1 is the other hoop 1 to be combined.

The planar shape of the hoop 1 is not limited to the illustrated example,
It may be a non-axisymmetric polygon in which two of the interior angles are right angles.

Furthermore, the combination is not limited to those of the same shape; for example, it is also possible to combine the hoop 1 in FIG. 1a with the hoop 1 in FIG. 1 by ey f.

The planar outline of the reinforcing hoops A formed by these various combinations needs to be adapted to the planar arrangement of the main reinforcements B, which are erected in plural on the foundation C, and the shape of the hoop 1 and the way they are combined must also be adjusted accordingly. Choose accordingly.

In the illustrated example, the main reinforcements B are erected at each vertex of the square.
In order to match this, the combination is such that the planar outline is approximately square. However, for example, if the planar arrangement of the main reinforcements B is a polygonal shape with unevenness, the pair of hoops 1 may be placed horizontally. A desired shape can be obtained by shifting in the direction and fixing.

Reinforcing strap A consisting of a pair of hoops 1 thus formed
The corners of each side forming a right angle are engaged with the outer circumferential surface of the main reinforcement B, and fixed by appropriate means such as welding.

A large number of reinforcing bars A are formed and stepped in the longitudinal direction of the main bars B, and serve to reinforce columns and beams by restraining concrete to be filled and formed.

As explained in the embodiment, since the hoops 1 are formed as a pair, each having a planar shape of a polygon larger than a pentagon with at least two of the interior angles being right angles, the intersection of the hypotenuses 4 or the upper side 5 By overlapping the bottom side 2 and combining the side surfaces 3 of both hoops 1 in a substantially continuous planar shape, a reinforcing tie bar A having an external shape that matches the general planar arrangement of the main bar B, such as a square or rectangle, is formed. It has the advantage of being easy to use.

By using a pair of arbitrarily selected hoops 1, the blade can be formed into various planar shapes such as a polygon with unevenness, so that various planar arrangements of the main reinforcing bars B can be accommodated, and the versatility is extremely high.

Furthermore, if the pair of reinforcing ties A are made of the same shape, it is easy to manufacture and can be mass-produced quickly, and the molding cost is also low, resulting in a significant reduction in production costs, making it inexpensive. Available.

In addition, the various hoops 1 shown in the figures are generally line symmetrical through the perpendicular bisector of the base 2, and by combining a pair of hoops 1, a hoop 1 is formed on each side of both hoops 1. Since the polygon inside the reinforcing stirrup A is line-symmetric and point-symmetric, the wire rods are evenly distributed inside the reinforcing stirrup A,
In each part of the plane, the concrete maintains its shape uniformly, and the load is distributed evenly.

In other words, the oblique side 4 of the internal polygonal portion 8 acts as if it were a brace, effectively withstanding external forces in the vertical and horizontal directions on the plane, and is equipped with additional reinforcing bars in the vertical and horizontal directions. It is extremely economical as it requires less reinforcement compared to the conventional method.

Further, by providing multiple stages to surround the main reinforcement B, it is effective to prevent buckling of the main reinforcement B.

As described above, the present invention forms a hoop 1 by bending a wire material and having a planar shape of a polygon of pentagon or more with at least two interior angles being right angles.
A pair of hoops 1 are assembled and fixed together in a partially overlapping manner so that the respective right-angled portions 6 of both hoops 1 are arranged around the periphery, and as a result,
The planar outline is an external polygonal part 7 that matches the planar arrangement of a plurality of main reinforcements B erected on the foundation C, and inside, a part of each side of both hoops 1 is an external polygonal part γ. Side of 2゜3.
Since the inner polygonal part 8 is more than a quadrangle and has an oblique side 4 that is oblique in plane with respect to 5, it is possible to form the internal polygonal part 8 in a filling manner, compared to the conventional strap made of a single loop-shaped wire. Because the contact area with concrete is overwhelmingly large, the binding force is extremely large, and it is far superior in terms of shape retention.

In particular, it can be used to construct pillars, beams, etc., which are the core structure of buildings, and can greatly contribute to improving their strength.

Furthermore, although the reinforcing hoops of the present invention are installed in stages separated by a predetermined interval in the direction in which the main reinforcement B is erected, each stage is separated and independent, so even if one part breaks, the entire reinforcement will be damaged. This has the advantage of being extremely safe compared to spiral tie bars, where a break in one place can have a chain reaction effect on the whole because it has a continuous spiral structure. is obtained.

At the same time, by adapting the planar outline to the planar arrangement of the plurality of main reinforcements B erected on the foundation C, the wire rods of the hoop 1 are evenly arranged on the inner periphery of the cross section of the pillars, beams, etc.
Both the center and internal edges of the columns and beams are fully reinforced.

As described above, according to the present invention, there are many contact parts with concrete, ensuring restraint and shape retention, strongly reinforcing columns and beams, and making it easy to handle, making it suitable for mass production. It has extremely excellent effects such as enrichment.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1a to 1f are plan views of the hoop, FIG. 2 is a perspective view, and FIG. 3 is a perspective view of the hoop in use. 1... hoop, 2... bottom, 3... side, 4...
- Hypotenuse, 5... Upper side, 6... Right angle part, 7... External polygonal part, 8... Internal polygonal part, A... Reinforcement tie bar, B... Main reinforcement, C ...Foundation.

Claims (1)

[Claims] 1. A wire rod is bent to form a hoop whose planar shape is a polygon of at least a pentagon with at least two right angles, and each right-angled part of both hoops has a pair of hoops surrounding the hoop. 1. A reinforcing tie bar characterized by being attached in a partially overlapping manner so as to be arranged.