JPS5817054Y2 - Reinforced spiral stirrup - Google Patents

Description

[Detailed explanation of the invention] This invention relates to reinforcing spiral tie bars, which are wrapped around the main reinforcement when constructing reinforced concrete columns and beams, and has been improved to prevent distortion of the entire structure during construction. This relates to reinforcing spiral bands.

The purpose of this is to form a spiral reinforcing bar, and in each hoop of this reinforcing bar, a reinforcing bar with both ends wound around the hoop to form an engaging ring is passed over the frame, and this reinforcing bar is In addition to providing each hoop at an appropriate number of stages, these reinforcing bars intersect in the direction of the winding axis to prevent deformation of the hoops, bulges on the sides, and twisting between the hoops, as well as shear reinforcement. It is an object of the present invention to provide a reinforcing spiral tie reinforcement that is extremely effective in restraining internal concrete and preventing buckling of the main reinforcement.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

The reference numeral 2 shown in the figure is a reinforcing bar, for example, a plurality of continuous hoops 1 of approximately square shape with the same external dimensions made of iron wire.
It is formed in a spiral shape.

At the side of the hoop 1 of this band reinforcing bar 2, a suitable number of reinforcement reinforcing bars 3 are provided in each stage or one stage in the winding axis direction, so that they intersect with each other when viewed from the winding axis direction.

As shown in FIG. 4, both ends of the reinforcing reinforcing bar 3 have engaging rings 6 wound around the hoop 1 to ensure sufficient fixation strength with the band reinforcing bar 2. engagement ring 6
is wound from above the hoop 1, and that 6 at the other end is wound from below the hoop 1, and the free end of the retaining ring 6 is as follows:
It is fixed to the reinforcing reinforcing bar 3 itself via a fixing part 4 using a suitable fastening part or welding.

The arrangement of the reinforcing reinforcing bars 3 is as shown in Figures 1, 2, and 3.
As shown in Figure A, the frame is not limited to the case where the reinforcing reinforcing bars 3 that are parallel to each side of a thousand-sided approximately square shape are crossed. The frame may be passed so that two reinforcement reinforcing bars 3 that are parallel to the sides of the frame intersect.

Furthermore, although not shown in the drawings, the reinforcing reinforcing bars 3 may be arranged to support the hoop 1, and the reinforcing reinforcing bars 3 themselves may not be straight, but may be broken or curved. Furthermore, they may be hooked onto each other.

Note that the shape of the hoop 1 is not limited to a square as shown in the figure, but may be circular, polygonal, etc., or may have a concave portion on some of these sides.

This device is constructed as described above, and when used, it is only necessary to arrange it so as to surround the main reinforcement 8 erected on a predetermined foundation as shown in FIG. In this case, since the reinforcing reinforcing bars 3 whose both ends are wound around the hoops 1 to form the engagement rings 6 are placed in each hoop 1 of the band reinforcing bars 2, the reinforcing bars 3 can be significantly strengthened by shear reinforcement. In addition, since no bulging occurs on the sides, the restraining force of the internal concrete is excellent, which not only prevents buckling of the main reinforcement 80 but also significantly increases the strength and toughness of concrete columns, etc.

Also, when the hoop reinforcing bar 2 is stretched, the reinforcing reinforcing bar 3 becomes the hoop 1.
If the hoops 10 are fixed to each other, twisting occurs between the hoops 10 and the reinforcing bars 3 become unusable.In contrast, according to this invention, the reinforcing bars 3 are wound around the hoops 1 at both ends of the hoops 10 to form an engaging ring. By forming the hoops 6, the racks are passed within each hoop 1, and since they are provided every appropriate number of stages and intersect with each other when viewed from the winding axis direction, the above-mentioned twisting and the like will not occur.

In other words, when wrapping the main reinforcing bars 8 that are the hoop reinforcing bars 2, the hoop reinforcing bars 2 are stretched, and at this time, the opposing sides of the reinforcing bars 3 are pulled upward and downward, respectively. At the same time, since the reinforcing reinforcing bars 3 are passed across the hoops, the reinforcing reinforcing bars 3 are stretched inward from the winding axis direction, and the corners are deformed and the corners are deformed between each hoop 1. Generates rotational displacement.

This rotational displacement is, for example, λ.For example, the external dimensions of the concrete column are 50cW1 both vertically and horizontally, and the pitch of each hoop 1 is 10cW1.
crns When the concrete cover thickness is 4 cm and the reinforcing bar diameter is 1 crn, the distance between hoops 1 is 0.64°.

If the floor height is 300 cm and the beam height is 70 c1n, the number of hoops is 23, and the rotational displacement between hoop 1 at the top end and hoop 1 at the bottom end is 0.64° x 23 = 14.7
2°, making it practically unusable.

However, in this invention, since the engaging ring 6 is formed by winding both ends around the reinforcing reinforcing bar 3, the tool 11, each hoop is It is possible to suppress the occurrence of habitual drinking.

Regarding the concrete column mentioned above, the required length of reinforcing reinforcing bar 30 when hoop reinforcing bar 2 is stretched is 0.23 CIrl from the side length.
Just being long is enough.

Therefore, the gap between the engagement ring 6 and the band reinforcing bar 2 is 0.12C.
rr1 is sufficient, and the gap that naturally occurs when forming the normal cohesive ring 6 is sufficient, and no twist will occur between the loops 10 when the reinforcing bar 2 is stretched.

Moreover, the shape itself is extremely easy to manufacture, and by standardizing it in advance, mass production at a factory is possible.

In addition, as shown in FIG. 1, by using an appropriate binding tool 7 to compress the bag so that it can be stretched freely, it can be easily transported and stored.

As described above, this invention is extremely useful in simplifying reinforcing bar assembly work, and also prevents deformation of the hoop, bulging of the edges, and twisting between the hoops during construction, and improves shear reinforcement and internal This is extremely effective in restraining the concrete and preventing buckling of the main reinforcing bars.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a perspective view of the compressed state, Fig. 2 is a perspective view of the used state, and Fig. 3 is a plan view as seen from the winding axis direction. Embodiment shown in FIGS. 1 and 2 differs from that shown in FIG. It is a diagram. 1... hoop, 2... hoop reinforcing bar, 3... reinforcing reinforcing bar,
4... Fixed part, 6... Engagement ring, 7... Binding tool, 8
...Main story.

Claims (1)

[Scope of utility model registration request] Form a spiral reinforcing bar, and within each hoop of this reinforcing bar,
The reinforcing bars with both ends wound into hoops to form retaining rings were passed over the frame, and these reinforcing bars were installed at every appropriate number of stages of the hoops, and these reinforcing bars were made to intersect when viewed from the winding axis direction. A reinforced spiral band muscle characterized by: