JPS5817866B2 - Flexible compound spiral band muscle - Google Patents

Description

Detailed Description of the Invention When constructing reinforced concrete columns and beams, the present invention is fixed to the main reinforcing bars to reinforce the columns and beams, and also strongly restrains the concrete to provide excellent shape retention and prevent shearing. This invention relates to a flexible compound spiral band muscle that can be reliably reinforced.

Conventionally, some reinforcing bars are made of only polygonal wire rods bent in a circular plane, and these are fixed so as to touch the outer circumferential surface of each of the main reinforcing bars that are erected. It is used in multiple tiers.

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

In addition, recently, it has been proposed that the planar shape of the pitch is circular by forming a polygonal spiral reinforcement with a single wire and wrapping it around the main reinforcement, but the reinforcing effect is The current situation is that it is not good enough and leaves a lot of room for improvement.

The present invention was created in view of the above points, and its purpose is to form a pair of spiral band muscles of the same shape,
By combining and fixing these, the planar outline is made into an external polygonal part in order to match the planar arrangement of a plurality of main reinforcing bars erected on the foundation. By providing a compound spiral tie reinforcement in which the sides of each tie reinforcement are arranged so as to form an internal polygonal portion having a shape, and by attaching the compound spiral tie reinforcement to the outer circumferential surface of each main reinforcement,
The objective is to ensure the restraining and shape-retaining properties of concrete to ensure shear reinforcement, to save labor in construction work, and to contribute to improving construction efficiency.

That is, the idea is to bend a flexible wire and form a spiral band whose planar shape for one pinch is a planar figure that is a polygon of at least a pentagon with at least two right angles. Then, each pair of spiral ties are made to have the same shape, and are combined and fastened so that the right angle parts of both spiral ties are arranged around the circumference, so that the planar outline is the same as the plane of a plurality of main bars erected on the base. An external polygonal part that matches the arrangement, and an internal polygon that is more than quadrangular in shape and has oblique sides that are oblique in plane with respect to the sides of the external polygonal part, in which a portion of each side of both spiral ties is diagonal in plane with the side of the external polygonal part. The reason lies in the fact that a rectangular portion is formed.

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

The spiral band reinforcement 1 shown in FIG. 3 is formed by bending a flexible wire, and one pitch is composed of a base 2, a side 3, and an oblique side 4, and has a planar pentagonal shape. .

The base 2 and the side sides 3 are perpendicular to each other to form a right angle part 5, and similarly, the oblique sides 4 also form a right angle part 6.

By forming two spiral ties 1 to form a pair and inserting the other hypotenuse 4 between the stepped hypotenuses 4 and combining them, the planar outline can be created by forming a plurality of spiral ties 1 on the base B. In order to conform to the planar arrangement of the main reinforcement C, an external polygonal part 7 is formed consisting of a base 2 and a side 3, and inside, a part of each side of both spiral ties 1 is formed into an external polygonal An internal polygonal portion 8 having a rectangular or larger shape having an oblique side 4 that is oblique in a plane with respect to sides 2 and 3 of 7 is formed.

To fasten both, as shown in Fig. 1a, connect the intersection points of the hypotenuses 4 to the lower ends of the other bottom sides 2 by appropriate means such as welding or tying with wire. However, in order to obtain a tighter bond, it is better to also fix the overlapping portions of each side 3.

In the embodiment shown in FIG. 3, the planar shape of the 11 pinches of spiral band muscles is a pentagon that is symmetrical about the perpendicular bisector of the base 2, but is not limited to this. , the pentagon shown in FIG.

It may be a hexagon as shown in f.

In addition, C and d in the figure are considered as modified examples of e in the figure.

Same figure. In the example of f, one pitch of the spiral is the base 2
, a side edge 3, an oblique edge 4, and a top edge (not shown); in Figures c and d, the side edge 3 and the oblique edge 4; , side 3 and oblique side 4 constitute one pitch.

These various types of spiral ties 1 have at least two right-angled portions 5 in their planar shape, and are combined and fixed with the other spiral ties 1 of the same shape to form a composite spiral ties A whose planar outline is square. is being molded.

As is clear from the illustrated row, the compound spiral band reinforcement A has a quadrilateral, hexagonal, or hexagonal internal polygonal portion 8 formed by each side 2, 3.4 of both sides of the spiral band reinforcement 1. have

The spiral band reinforcement 1 can be formed into a polygonal shape with unevenness by combining a pair of them with a slight shift in the plane direction, but it is possible to form a compound spiral reinforcement to match the planar arrangement of the plurality of main reinforcements C erected on the base B. Determining the planar outline of the stirrup A is instrumentation.

In FIG. 1, the diagonally shaded portions are the other spiral bands 1 to be combined, respectively.

In addition, the anchoring positions of both spiral band muscles 1 are partially overlapped as shown in the first diagram, and also as shown in Fig. 5a.

Welding or the like may be performed by bringing them into planar contact as shown in C, or by engaging them as shown in the figure.

Among these, in the case of the same figure, care is taken so that the intersection of the oblique sides 4 does not protrude beyond the line connecting both ends of the side sides 3.

As mentioned above, various compound spiral band muscles A shown in FIG.
The internal polygonal portion 8 formed inside the plane has line symmetry and point symmetry, so it has uniform restraint properties for concrete in the plane space, and good shape retention and load sharing.

To assemble a reinforcing bar using the compound spiral tie reinforcement A formed in this way, as shown in FIG. In the same way, all the right angle parts 5 are connected to a plurality of main reinforcements C.
They are connected and fixed by welding or the like.

After that, concrete is filled using an appropriate method and columns and beams are constructed.

In the illustrated example, it is assumed that the main reinforcements C are arranged and erected at the four corners of the square. In cases where the main reinforcements C are arranged respectively, form the planar shapes as shown in Figure 1 a and b, and place the main reinforcements C at the intersection of the hypotenuse 4 and the base 2.
In the same way, changes in the number of main reinforcements C can be handled by forming various planes as shown in the first figure.

Since the spiral ties 1 according to the present invention are made of a flexible wire, the spiral ties 1 are compressed in the axial direction and tied appropriately as shown in FIG. It becomes possible to bind with a tool.

Similarly, FIG. 6 shows a state in which a compound spiral band A is formed by inserting and superimposing a pair of spiral band reinforcements 1 and contracting them so that they can be stretched and tied. These features facilitate material and product management, save space, and facilitate transportation to the site.

That is, in the normal state without compression, the total length in the axial direction is made equal to the desired height, or the composite spiral band muscle A, which has been uncompressed and restored, is stretched to the desired height. Although it is free to use it as it always tends to contract, in any case, the compressed and tied compound spiral band reinforcement A is placed on the base B so as to surround the plurality of main reinforcements C, and then tied and tied. The rod is removed to release the compression of the wire that has resisted the elastic force, and the wire is returned to its axial direction before being fastened and the reinforcing bar is assembled.

Therefore, according to the present invention, the planar outline is made into an external polygonal part 7 that matches the planar arrangement of a plurality of main reinforcements C erected on the foundation B, and each of the spiral band reinforcements 1 is provided inside. Since a part of the side is configured to form an internal polygonal part 8 that is more than a quadrangle and has an oblique side 4 that is flat and oblique to the side 2°3 of the external polygonal part 7, it is possible to Compared to spiral tie bars made of loops or single wires, the contact area with the concrete being filled is overwhelmingly large, that is, the amount of wire rods contained per unit volume is large, which improves the restraint and shape retention of concrete. It has excellent strength, reliable shear reinforcement, and excellent strength and toughness.

That is, the oblique side 4 of the internal polygonal portion 8 acts as if it were a brace, effectively resisting looseness in the vertical and horizontal directions on the plane, and also has separate reinforcing bars in the vertical and horizontal directions. Compared to charging steel, it requires less reinforcement and is extremely economical.

In addition, by adapting the planar outline to the planar arrangement of the main reinforcing bars C, wire rods are distributed evenly on the inner periphery of the cross section of columns and beams.
Because of this, both the center and internal periphery of the pillar etc. are fully reinforced.

In addition, a pair of spiral ties 1 of the same shape are formed such that the planar shape for the pitch is a polygon of at least a pentagon with at least two right angles, and each right angle portion of both spiral ties 1 is formed. 5 and 6 are combined and fastened so that they are arranged around the periphery, there is an advantage that it is easy to form a composite spiral band reinforcement A having an external shape that matches the general planar arrangement of the main reinforcement C, such as a square or rectangle.

. By changing the shape of the spiral band 1 and the fixing position with the other, the external polygonal part 7 has a rectangular planar outline and a polygonal shape with unevenness. Since the internal polygonal part 8 having the hypotenuse 4 can be formed, the main reinforcement C of various planar arrangements,
In other words, it can be used to construct columns, beams, etc. with various cross-sectional shapes, and is extremely versatile.

Since the pair of spiral tie reinforcements 1 are of the same shape, it is possible to quickly cope with mass production without reducing the production time and effort, and the molding cost is also low, and the production cost can be significantly reduced, so it can be provided at low cost. be.

By using compound spiral stirrups A to surround and cover multiple main reinforcements C, the installation work for main reinforcements C can be done in one time, compared to the method of installing loop-shaped stirrups made of single wire individually. This can contribute to labor saving and speeding up construction, and can contribute to improving construction efficiency.

In addition, since all of the series of vertically stepped right-angled portions 5 of the compound spiral band reinforcement A are connected and fixed to the plurality of main reinforcements C, the main reinforcement C
It is effective in preventing buckling, and it is possible to obtain a strong and strong reinforced steel structure.

As described above, according to the present invention, the number of contact areas with concrete is increased to improve its restraint and shape retention, and together with the connected main shaft, shear reinforcement is ensured, and strength and toughness are improved. In addition to contributing to the improvement of the steel structure, it also has various extremely excellent effects, such as making it possible to save labor and speed up the reinforcing bar assembly work at each installation station.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1A to 1F show the planar shape of a compound spiral band, FIG. 2 is a perspective view of a compressed and tied spiral band, and FIG. is a perspective view of the spiral band muscle at normal times, Figure 4 is a perspective view of the spiral band muscle in use, and Figures 5 a to C.
FIG. 6 is a partially omitted plan view showing various fixing positions, and FIG. 6 is a perspective view of a composite spiral band muscle that has been compressed and tied. 1...Spiral band muscle, 2...Base, 3...
...Side side, 4...Hintenuse, 5...Right angle part, 6...Right angle part, 7...External polygonal part 8. ...Internal polygonal part, A...Compound spiral tie bar, B...Foundation, C...Main reinforcement, D...Binding device.

Claims (1)

[Claims] 1. A wire rod having flexibility is bent to form a spiral band reinforcement whose planar shape for one pinch is a planar figure exhibiting a polygon of pentagon or more with at least two interior angles being right angles, and the spiral band reinforcement is An external polygonal part whose planar outline conforms to the planar arrangement of a plurality of main shafts erected on the base, by combining and fixing the pairs so that the right angle parts of both spiral bands are arranged around the circumference, with each pair having the same shape. "And inside, a part of each side of both spiral ties forms an internal polygonal part that is more than a quadrangle and has an oblique side that is oblique in a plane with respect to the side of the external polygonal part. A flexible compound spiral band muscle characterized by the following characteristics: