JPS5919219B2 - Rebar basket - Google Patents

Description

[Detailed description of the invention] The present invention is used when constructing reinforced concrete columns and beams, and it restrains concrete well to ensure shape retention.
This invention relates to a reinforcing cage that ensures shear reinforcement.

Conventionally, reinforcing bars used as aggregates for reinforced concrete include those consisting only of the main reinforcement of original steel material, and those in which wire rods are spirally wound around the main reinforcement.

However, in these cases, the restraining properties of concrete,
It is not sufficient in various aspects such as strength, has poor earthquake resistance, and cracks occur in the concrete after many years of use.
There is also a risk that the main reinforcement will buckle.

The present invention was created in view of the above-mentioned problem, and its purpose is to form a pair of spiral bands having a plane pentagonal shape or more with at least three right angles, and to combine and fasten them to form an internal structure. By creating a composite spiral tie bar with a hypotenuse and connecting and fixing multiple main bars parallel to the axis of the composite spiral tie bar, we aim to improve the restraint of concrete and shear reinforcement, and improve the overall structure. The aim is to provide a number of units that can be made into units to speed up and smooth out a series of construction tasks.

In other words, the gist is that a pair of spiral bands are formed by bending a wire so that the planar shape of one pitch is a polygon of at least a pentagon with two interior angles at right angles. One spiral band reinforcement is inserted and fixed between each pitch of the other, and the sides forming each pitch of both spiral bands have oblique sides inside the plane that are oblique to the sides outside the plane. A compound spiral band muscle arranged as a compound spiral band muscle, and a compound spiral band muscle that is inscribed and penetrated substantially parallel to the axis of the compound spiral band muscle at least all the vertices of the planar outline of the compound spiral band muscle, and the inscribed portion thereof. It consists of a plurality of main reinforcements that are connected and fixed to the compound spiral band muscles.

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

The spiral band reinforcement 1 shown in FIG. 1 is formed by bending a wire rod, and the planar shape of one pitch thereof is a planar shape that is a polygon of at least a pentagon with at least two interior angles being right angles. It is composed of a bottom side 2, a side side 3, an oblique side 4, and an upper side 6.

The side edges 3 are bent perpendicularly to the bottom edge 2, and a number of right angle portions 5 between them extend parallel to the axis of the spiral band 1.

By forming a pair of spiral band reinforcements 1 with the same shape and interposing the other spiral band reinforcement 1 between each pitch of one spiral band reinforcement 1 and combining them, the sides forming each pitch of both spiral band reinforcements 1 are ,
It is arranged so that it has an oblique side 4 inside the plane that is oblique with respect to the sides outside the plane.

For example, the hypotenuses 4 of the other spiral ties 1 may be inserted between the respective oblique sides 4 of the spiral ties 1 on one side, and the intersections of the hypotenuses 4 on one side may be arranged in an overlapping manner at the lower end of the circumferential surface of the bottom side 2 of the other side. , one hypotenuse 4
The upper side 6, which is continuous with the upper side 6, is similarly arranged at the lower end of the peripheral surface of the other bottom side 2 in an overlapping manner.

Thereafter, the overlapping portion is fixed by means such as welding or wire binding to form a composite spiral band A.

In order to connect both spiral band muscles 1 more firmly, the overlapping portions of the respective side sides 3 may also be fastened together.

Figures 3a to 3f show the planar shapes of the compound spiral band muscles A formed in this way, and by variously changing the combinations of the planar shapes of the spiral band muscles 1 and their planar arrangement,
Various compound spiral band muscles A are formed, each having an internal polygon, that is, a polygon larger than a quadrangle with a hypotenuse 4 that is oblique in a plane.

To explain a specific example according to the illustrations, in FIG. The pentagonal spiral strips 1 are arranged in opposite directions and are combined with the intersection of the hypotenuses 4 located approximately in the center of the other base 2, so that the hypotenuses 4 form a quadrilateral inside the plane. be.

In Figure 3, one pitch is the base 2, and approximately 1/2 of this base 2.
Two sides 3, two oblique sides 4, and one top side 6 are arranged in opposite directions to each other, and the base side 2 and top side of each other are opposite to each other. 6 are placed one on top of the other, and a hexagon is arranged inside the plane by the oblique side 4 and the upper side 6.

In Fig. 3C, ■ a planar hexagonal spiral band 1 with a pitch of a base 2, a side 3 longer than the length of the base 2, and an oblique side 4 are arranged line-symmetrically; are arranged in opposite directions, and a hexagon is arranged inside the plane by a part of the hypotenuse 4.

In Figure 3d, one pinch is the base 2 and side 3 of approximately the same length.
, hexagonal hexagonal spiral reinforcements 1 constructed by arranging hypotenuses 4 line-symmetrically are assembled in opposite directions so that right angle portions 5 are arranged at the four corners, and a quadrangle is arranged inside the plane by the hypotenuses 4. It is something.

In Figure 3 e, the pitch is base 2, approximately 1/2 of this base 2.
Two sides 3 slightly longer than the length, and two hypotenuses 4 make up the planar pentagonal spiral ties 1 in opposite directions, and the intersection of one hypotenuse 4 is set at approximately the center of the other base 2. The oblique side 4 and a part of the oblique side 4 of the side side 3 form a hexagon inside the plane.

Fig. 3 f shows a planar hexagon formed by a base 2, two side sides 3, two hypotenuses 4 slightly longer than approximately 1/2 the length of the base 2, and one upper side 6. An octagon is arranged inside the plane by a part of the oblique side 4 of the oblique side 4, the upper side 6, and the side side 3, with the spiral band reinforcements 1 facing oppositely to each other, and the base sides 2 and top sides 6 of each other being overlapped. It is.

In addition, the spiral band reinforcement 1 shown in FIG. 5 are adjacent to each other, the right-angled portions 5 may face each other with respect to the center as shown in c and d of the figure. The other spiral band reinforcement 1 is arranged so that the right angle section 5 formed by the
, and form a compound spiral band muscle A with a square planar outline.

The planar shape of these spiral band muscles 1 is not limited to the illustrated embodiment.

Of course, other shapes may be used, but when a pair of spiral bands 1 are combined, the sides of both sides 2°, 3, 4, 6, etc. in the plane are square, hexagonal, octagonal, etc. It is necessary to arrange a large number of them to form a

Further, in each embodiment, pieces of the same shape are combined, for example, the spiral band muscles 1 shown in FIG. 3a and the spiral band muscles 1 shown in FIG.

It may be combined with the spiral band muscle 1 shown in f, and various combinations are also planned.

The planar outline of the compound spiral band A can be made rectangular or polygonal with unevenness, and these shapes can be obtained by changing the shape of the spiral band 1, the attachment position, etc.

What is shown in FIGS. 4a to 4C are other embodiments of the fixing positions of both spiral band muscles 1.

Figure a. As shown in C, it is also possible to join them two-dimensionally or to engage them as shown in the figure.

When engaging as shown in the figure, care must be taken to ensure that the engaging portion does not protrude beyond the line connecting both ends of the side 3.

A plurality of main reinforcing bars B are inserted and fixed to the compound spiral reinforcement A thus formed, and the main reinforcing bars B may be a normally used round steel with a circular cross section or a deformed reinforcing bar with protrusions on the circumferential surface.

As shown in Fig. 2, the - of the main reinforcement B is inserted so as to be inscribed in all the series of right angle parts 5 that are crotched in the vertical direction around the compound spiral band reinforcement A, and welded at the inscribed part. It is fixed by appropriate means such as.

Similarly, a plurality of main reinforcements B are connected and fixed to each right angle portion 5.

The main reinforcements B are arranged parallel to the axis of the compound spiral band reinforcement A, and their planar arrangement matches the planar outline of the compound spiral band reinforcement A.

In addition to each right-angled portion 5, the main reinforcement B may penetrate each side intersection of both spiral ties 1, for example, although not shown, the middle point of each side of a square outline, and may be fixed to the compound spiral ties A. In this way, it can be arranged at each vertex of the polygon formed inside the plane of the compound spiral band muscle A.

In addition, the planar outline of the compound spiral band muscle A may be a polygon with unevenness, and in any case, it is important to arrange the main reinforcement B so as to cover at least all the vertices of the planar outline. .

It goes without saying that the planar shape of the compound spiral tie reinforcements A and the arrangement of the main reinforcements B are determined depending on the cross-sectional shape of the column or beam to be constructed. Since various planar shapes can be formed, it can be applied to columns, beams, etc. with irregular cross sections.

To explain its use, reinforcing bars are combined and prepared according to the cross-sectional shape of a column or beam and are erected or erected on site.For example, when constructing a column, waterproof concrete is used as shown in Figure 2. After that, concrete is poured to cover the entire reinforcing cage.

As described in the embodiment, the spiral band reinforcement 1 is formed such that the planar shape for one pitch has at least two internal angles that are right angles,
By combining and fixing the right angle parts 5 so that they are arranged around each other, there is an advantage that it is easy to form a reinforcing bar having a planar outline such as a square or rectangle, which is a general cross-sectional shape of a column or a beam.

Moreover, the spiral band muscles 1 shown in FIGS. 3a to 3f are symmetrical in plane, and by combining them with those of the same shape,
The planar shape of compound spiral band muscle A is line symmetric and point symmetric,
Since the sides of the spiral band reinforcement 1 are evenly arranged inside, the conch 17) is restrained uniformly, and shape retention and load sharing are also improved.

In addition, if the pair of spiral band reinforcements 1 are made to have the same shape, it will be suitable for mass production and material management will be easy, and the molding cost will be low, and the production cost can be significantly reduced, so it can be provided at low cost.

Since the main reinforcing bars B are arranged at least at all of the vertices of the polygon formed inside the plane of the compound spiral band reinforcing bars A, the strength of the reinforcing bars is further improved.

In addition, if each main reinforcement B is internally attached so as to be connected to all of the right angle parts 5 that are vertically crotched, the compound spiral band reinforcement A will be arranged so as to surround the main reinforcement B, and the buckling of the main reinforcement B will be prevented. Effective in prevention.

Therefore, according to the present invention, the compound spiral tie reinforcement A is placed inside the plane with oblique sides 4 that are oblique with respect to the sides outside the plane on both sides of the spiral tie reinforcement 1, so that it can be driven. There are many contact parts with concrete, that is, a large amount of wire rods are included per unit volume, and it has excellent restraint and shape retention of concrete, reliable shear reinforcement, and has high strength and toughness.

That is, the oblique side 4 inside the plane of the compound spiral band reinforcement A acts as if it were a brace, effectively resisting external forces in the vertical and horizontal directions in the plane, and also provides additional reinforcement in the vertical and horizontal directions. Compared to inserting reinforcement, it requires less reinforcement and is extremely economical.

Not only that, but the oblique side 4 is one in which the planar shape of the spiral band muscle 1 forming the compound spiral band muscle A is a polygon of pentagon or more, and a pair of the two is inserted, so it is only necessary to combine them. It is convenient because there is no need to prepare another spiral band with a small diameter.

Compound spiral band muscle A is formed by inserting and fixing the other spiral band muscle 1 between each pitch of one spiral band muscle 1.
Depending on the planar shape and how they are combined, composite spiral band reinforcement A having various planar shapes can be obtained. Suitable for constructing beams and extremely versatile.

In addition, the main reinforcement B is inscribed in at least all the vertices of the planar outline of the compound spiral band muscle A substantially parallel to the axis of the compound spiral band muscle A, and the main reinforcement B is inserted and fixed at the inscribed portion. As a result, the whole becomes a unit with an integrated structure, and it can be manufactured to a predetermined size, so there is no need to wind and attach the spiral tie reinforcement 1 to the main reinforcement B on site, and a series of Construction work can be carried out smoothly and quickly.

As described above, according to the present invention, the number of contact parts with concrete is increased to ensure its restraint and shape retention, and shear reinforcement is ensured, and since it can be manufactured as a unit, on-site work is reduced. It has various extremely excellent effects such as simplifying the process and contributing to labor saving.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view of a spiral band muscle, FIG. 2 is a perspective view showing the state of use, and FIGS. 3 a to 3 f are plan views showing various embodiments. , Figure 4 a to C
2 is a partially omitted plan view of the case where the anchoring positions of both spiral band muscles are variously changed. 1...Spiral band muscle, 2...Base, 3...
...Side side, 4...Hintenuse, 5...Right angle part, 6...Top side, A...Compound spiral band, B... ...Main reinforcement, C...Ground.

Claims (1)

[Claims] A pair of spiral ties are formed by bending the wire so that the planar shape for 11 pitches is a polygon of at least a pentagon with two interior angles at right angles, and one of the spiral ties is bent. The other pitch is interposed and fixed between each pitch, and the sides forming each pinch of both spiral bands are arranged with oblique sides inside the plane that are oblique with respect to the sides outside the plane. The compound spiral band muscle is inscribed and penetrated approximately parallel to the axis of the compound spiral band muscle at least all the vertices of the planar outline of the compound spiral band muscle, and the compound spiral band muscle is inscribed in the inscribed portion of the compound spiral band muscle. A reinforcing bar characterized by being composed of multiple main bars that are connected and fixed.