JPH07207839A - Bundled bar - Google Patents

Abstract

PURPOSE:To use ordinary reinforcements instead of reinforcements in large diameter purchased usually on special order, and to obtain an effect same as that obtained by the reinforcements in large diameter. CONSTITUTION:A bundled bar is made up by bundling a plurality of reinforcements 11 with at least one spacer 12 interposed inside, and the spacer 12 is equipped with a plurality of seats 12b that are formed to position each of the reinforcements 11 around the spacer. Each of the reinforcements 11 is fixed along each of the seats 12b, and thereby spaces can be kept between each of the reinforcements 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bundled bar, and more particularly to a bundled bar used as a reinforcing bar in RC or reinforced concrete construction.

[0002]

2. Description of the Related Art Conventionally, it is well known that in RC construction, a large number of reinforcing bars are arranged at predetermined intervals.
In general, the distance between one reinforcing bar and another adjacent reinforcing bar is 1.7 D when the diameter of the reinforcing bar is D due to the problem of fixation of concrete to the reinforcing bar (when the center distance between the reinforcing bars is 2. 7D) must be provided.

[0003]

As described above, since the reinforcing bars used for RC construction must be arranged at a predetermined interval, many reinforcing bars should be arranged to increase the strength of RC construction. Then, as described above, there is a problem that the cross-sectional area of the reinforced concrete structure becomes large by securing the interval between the reinforcing bars.

However, in order to avoid this, if a reinforcing bar thicker than the standard product is to be used, a custom-made product must be used, which significantly increases the cost and thus increases the construction cost. It can be a cause.

The object of the present invention is to solve the above-mentioned problems of the prior art, and the conventional reinforcing bar is used in place of the conventionally ordered large diameter reinforcing bar to obtain the same effect. It is to provide a bundling muscle that can be done.

[0006]

SUMMARY OF THE INVENTION The present invention is a bundling muscle,
In order to solve the above-mentioned technical problem, it has the following configuration. That is, the bundling muscle of the present invention has at least one inside.
Multiple reinforcing bars 1 bundled with one spacer 12
1, the spacer 12 is provided with a plurality of seat portions 12b formed around the spacer 12 to position the reinforcing bars 11, and the reinforcing bars 11 are attached to the seat portions 1 of the spacer 12.
It is characterized in that the mutual distance between the reinforcing bars is maintained by fixing the reinforcing bars along 2b.

Further, the present invention is a bundling bar in which a plurality of rebars 11 are bundled and arranged in concrete, in order to keep the intervals between the rebars 11 at the ends of the plurality of rebars 11 to be bundled. Columnar spacers 16 and 20 are arranged, and the reinforcing bar end portions are respectively provided in a plurality of groove-shaped seat portions 17 for positioning the reinforcing bars formed around the spacers so that the end portions of the reinforcing bars are substantially in the longitudinal direction of the spacers 16 and 20. The spacers 1 are arranged and fixed up to half, and the other end portions of the respective reinforcing bars are arranged in the groove-shaped seat portions 12b of the other half of the spacer 16 in the longitudinal direction.
6, 20 is also used as a joint for reinforcing bars.

Further, the present invention is a bundling bar which is arranged in concrete by bundling a plurality of rebars 11, wherein the ends of the plurality of the rebars 11 to be bundled hold a space between each of the rebars 11. Columnar spacers 23 are arranged, and one end or each end of each reinforcing bar is arranged at a plurality of groove-shaped seat portions 24 for positioning each reinforcing bar formed around the spacer. It is characterized in that the other end of each rebar that is added to the seat portion 24 which is open in the spacer 23 is arranged and fixed to the spacer 23.

[0009]

According to the bundling bar of the present invention, the reinforcing bars 11 are bundled so as to be along the plurality of seat portions 12b formed around the spacer 12, and the reinforcing bars 11 are attached to the spacers 12.
To fix. As a result, the respective reinforcing bars are bundled while maintaining a mutual space by this spacer.

As described above, the plurality of reinforcing bars 11 are formed by the spacers 12.
Bundling streak 10 which is bound with a predetermined interval by
Is reinforced according to a conventional method, for example, when constructing a building and embedded in concrete. At that time, as described above, the spacer 1 is provided between the central portion of the bundling bar 10 and each of the reinforcing bars.
Since the predetermined interval is secured by the existence of 2, the concrete can easily enter and the concrete can be sufficiently fixed.

Further, the bundling bar of the present invention is constructed by arranging the columnar super-spacers 16 and 20 at the ends of the fixed-size reinforcing bars to be bunched. Each of the spacers 16 and 20 is also formed with a plurality of groove-shaped seat portions 17 extending in the longitudinal direction around the spacers 16, 20 so that the end portion of each rebar 11 reaches each half of the spacer 16, 20 in the longitudinal direction. Arranged and fixed along the section.

The seats 17 on the other longitudinal halves of the spacers 16 and 20 are used for arranging the other end portions of the reinforcing bars to be added. That is, this bundle 1
In Fig. 5, the reinforcing bar end portions to be replenished and the replenishing rebar end portions are arranged and fixed to the respective longitudinal halves of the groove-shaped seat portions 17 of the spacers 16 and 20 arranged to maintain the distance between the reinforcing bars. This spacer 16,
20 is also used as a joint for adding the reinforcing bar 11.

Further, in the bundling bar of the present invention, the columnar spacer 23 arranged at the end of each reinforcing bar constituting the bundling bar forms a plurality of groove-shaped seat portions 24 extending in the longitudinal direction thereof, The end portions of the reinforcing bars are arranged in the plurality of grooved seat portions 24 every other one or more. The other end portions of the reinforcing bars to be added are arranged in the grooved seat portion 24 of the spacer 23 so that the end portions of the two bundle reinforcing bars partially overlap each other in the longitudinal direction. It is fixed to the spacer.

[0014]

EXAMPLES The bundle streaks of the present invention will be described below in more detail with reference to the examples shown in the drawings. FIG. 1 shows a bundling streak 10 according to a first embodiment of the present invention. The bundling bar 10 according to this embodiment is formed by welding four (4) columnar reinforcing bars 11 of a conventional size and a star-shaped spacer 12 (welding portion is indicated by 13) and bundling them.

As shown in FIG. 2, the star-shaped spacer 12 has a seat portion 12b having a curved surface corresponding to a part of the peripheral shape of the reinforcing bar 11 on the side portion between the four projecting end portions 12a.
Is equipped with. Such a spacer 12 is formed of cast iron or a processed product. The reason for bundling the plurality of conventional reinforcing bars 11 with the special spacer 12 interposed is as follows.

When a plurality of rebars 11 are simply bundled, as shown in FIG.
As shown in FIG. 3, the center part becomes a very narrow space part 14 closed in four directions. Therefore, if the reinforcing bars are simply bundled as shown in FIG. 3, the central space 1
No concrete can get into No. 4, and even if it goes in, there will be a problem in fixing with the reinforcing bar.

Therefore, it is necessary to bundle a plurality of reinforcing bars 11 by using a spacer 12 as shown in FIG. The spacers 12 may be arranged in appropriate numbers at appropriate positions so that a predetermined mutual reinforcing bar spacing can be maintained at any position along the longitudinal direction of the reinforcing bars, and there is no particular limitation on the mounting position or the number of mounting.

The bundling streak 10 thus constructed is
Although a plurality of regular size reinforcing bars (conventional reinforcing bars) are bundled, they are apparently arranged as one reinforcing bar. As a result, the concrete can easily enter between the reinforcing bars 11 in the bundling bar 10 and also exert a predetermined anchoring, and as a result, the strength equivalent to that of the reinforcing bar having a large diameter can be exerted.

FIG. 4 shows a bunch streak 15 according to a second embodiment of the present invention. The bundling bar 15 of this embodiment is configured by bundling four reinforcing bars 11 as in the first embodiment,
A columnar spacer 16 is attached to the ends of the reinforcing bars 11 to maintain the distance between them. This spacer 16
Is the spacer 1 whose end face shape is shown in FIGS. 1 and 2.
2, the four seats 17 on which the ends of the reinforcing bars 11 are positioned have a groove-like curved surface extending in the longitudinal direction of the spacer 16.

The groove-shaped seat portion 17 formed in the spacer 16 is provided with a partition portion 18 at the longitudinal intermediate portion thereof as shown in FIGS. 4 and 5, and each groove-shaped seat portion 1 is provided.
Area 7 is divided into the left and right in the longitudinal direction. As shown in FIG. 4, the ends of the reinforcing bars 11 are arranged in the respective seats 17 on the one side, and the ends of the reinforcing bars 11 are welded to the spacer 1 by welding.
It is fixed to No. 6 (welded portion is shown by reference numeral 19). As a result, each rebar 11 has a spacer 1 arranged at its end.
6 are bundled while maintaining a predetermined interval.

By the way, this spacer 16 is used for each rebar 1
It also functions as a joint as well as a function of holding and bundling 1 at a predetermined interval. That is, the reinforcing bar 11 that constitutes the bundling bar 15
When further reinforcing bars are added to form the long bundled bars, the reinforcing bars to be added are positioned on the seat portions 17 in the other half of the longitudinal direction of the spacer 16 and are arranged on the same axis as the reinforcing bars to be added, and the It is fixed to the portion 17 by welding or the like.

As a result, in the bundling bar 15 of this embodiment, the spacers 16 bundling the reinforcing bars 11 at a predetermined interval are formed into a columnar body extending in the longitudinal direction of the reinforcing bar 11 as shown in FIG. By arranging and fixing the reinforcing bars 11 that are added to the seat portion 17 on the same axis, not only can the reinforcing bars be held at a predetermined mutual interval, but they can also be used as joints for the reinforcing bars.

In the above-described first and second embodiments, each rebar 11 is fixed to the spacer 12 or the spacer 16 that also serves as a joint by welding. 6 and 7, the ends of the reinforcing bars 11 extending from both sides in the axial direction are arranged in the respective seats of the spacer 20 that also serves as a joint, and the outer peripheral part thereof is made of, for example, a metal wire. It may be fixed by winding it in a spiral shape at 21.

Furthermore, FIG. 8 shows a bundling line 22 according to a third embodiment of the present invention. The bundling bar 22 according to this embodiment is basically configured by bundling four reinforcing bars 11 as in the bundling bar of the first embodiment. This bundling muscle 22
A columnar spacer 23 as shown in FIG. 9 is attached to the end portion of the reinforcing bars 11 in order to maintain the distance between them. The spacer 23 is configured so as to also function as a joint for adding four rebars 11.

That is, this columnar spacer 23 is shown in FIG.
As is clear from the above, the cross section has a regular octagonal shape, but each surface thereof is a seat portion 24 formed of a groove-shaped curved surface so that the reinforcing bar 11 can be adhered along its longitudinal direction. Therefore, eight seat portions 24 are formed on the peripheral surface of the columnar spacer 23.
Are formed. In each of these eight seat portions 24, four end portions of each reinforcing bar 11 are arranged every other one. Then, four other end portions of the reinforcing bars 11 to be replenished are arranged in the seat portions 24 that are open every other space of the spacer 23.

Therefore, when the reinforcing bars are replenished by the spacers 23, the ends of the reinforcing bars partially overlap with each other in the longitudinal direction. In this way, in the bundling muscle 22 in the third embodiment,
The end portions of the reinforcing bars to be replenished and the end portions of the reinforcing bar to be replenished are arranged so as to overlap each other by utilizing a large number of seat portions 24 of the spacer 23, and then the outer peripheral portion thereof is spirally formed with, for example, a metal wire 25. It is bound by tightening it.

In the first and second embodiments of the present invention described above, the spacer 12 or the spacer 16 has a cross shape on the end face and is intended to bind the four rebars 11. Needless to say, the spacer is not limited to this, and a spacer having seat portions corresponding to the number of reinforcing bars to be bundled can be used. The same applies to the spacer 23 according to the third embodiment, and it goes without saying that the end face shape can be appropriately changed according to the spirit of the invention.

[0028]

As described above, according to the bundling bar of the present invention, the conventional rebar of the normal size is bundled by using a unique spacer, and this is apparently used as one rebar. Since it is not necessary to use a custom-made product as in the past, it is possible to suppress the cost increase of the bar arrangement and
The strength can be improved without increasing the C-shaped cross-sectional area.

Further, according to the bundling bar of the present invention, a spacer for maintaining the interval between the reinforcing bars is arranged at the end of the reinforcing bars having a predetermined length to be bundled, and the reinforcing bars are used to replenish the reinforcing bars. Therefore, as compared with the conventional method in which the end portions of the reinforcing bars are overlapped and one by one is replenished by welding or the like, replenishment can be remarkably facilitated, and therefore rebar work can be facilitated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a bundled streak according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a star-shaped spacer constituting the bundled streak of the first embodiment shown in FIG.

FIG. 3 is a cross-sectional view of a case where conventional rebars of a normal size are simply bundled.

FIG. 4 shows a second embodiment of the present invention in a state in which a joint / spacer for bundling each reinforcing bar at a predetermined interval and at the same time continuing to add another reinforcing bar is arranged at the end of the reinforcing bar. It is a perspective view showing the bundling muscle which concerns.

FIG. 5 is a perspective view showing a joint / spacer used in the bundling streak according to the second embodiment of the present invention shown in FIG.

FIG. 6 is a perspective view partially showing a state in which the reinforcing bar to be added to the joint / spacer and the reinforcing bar to be added together in the bundling bar of the present invention are wound and fastened together with a metal wire.

FIG. 7 is a cross-sectional view showing a bundling streak using the joint / spacer shown in FIG.

FIG. 8 is a perspective view of a bundling bar according to a third embodiment of the present invention with the joint portion of the reinforcing bar being centered.

FIG. 9 is a perspective view showing a state in which another reinforcing bar is added to a spacer that also serves as a joint and is bundled while maintaining a space in the bundling bar according to the third embodiment shown in FIG.

[Explanation of symbols]

 10 Bundling Rebar 11 Conventional Size Rebar 12 Star Spacer 12a Projecting End 12b Seat 13 Weld 14 Space 15 Joint Spacer 16 Partition 17 Groove Seat 20 Joint Spacer 21 Winding Wire 22 23 Spacer for joint use 24 Seat 25 Metal wire

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoji Hosokawa 2-10-10 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd.

Claims (3)

[Claims] 1. Reinforcing bars comprising a plurality of reinforcing bars bundled with at least one spacer interposed inside, the spacer having a plurality of seats formed around the reinforcing bars to position the reinforcing bars. A bundling bar, characterized in that the reinforcing bars are held along the respective seat portions of the spacer so as to be fixed to each other. 2. A bundling bar which is arranged in concrete by bundling a plurality of rebars, wherein columnar spacers are arranged at the ends of the plurality of rebars to be bundled so as to maintain a space between the rebars. Each of the reinforcing bar end portions is arranged and fixed to a plurality of groove-shaped seat portions for positioning the reinforcing bars, which are formed around the spacer, and are fixed to approximately half the longitudinal direction of the spacer. The other end of each reinforcing bar is arranged in the groove-shaped seat part of the half of the above, and this spacer is also used as a joint of the reinforcing bar. 3. A bundling bar which is arranged in concrete by bundling a plurality of rebars, wherein columnar spacers are arranged at the end portions of the plurality of rebars to be bundled so as to maintain a space between the rebars. The seat portion in which the end portions of the reinforcing bars are arranged at intervals of one or a plurality of grooved seat portions for positioning the reinforcing bars formed around the spacer, and the spacer is open. Bundling bar characterized by arranging the ends of other reinforcing bars to be added to and fixing it to this spacer.