JP3864236B2 - Reinforcing bar composition and its pre-assembly processing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reinforcing bar composition and a prefabricated processing method of the reinforcing bar composition, and aims to simplify and speed up the reinforcing bar construction work and reduce the cost, and to improve safety and hygiene.
[0002]
[Prior art]
For various construction works in the field of construction and civil engineering, it is indispensable to construct a rebar composition by combining a number of rebars that have been cut or bent before the concrete placement. The processing and assembly of reinforcing bars, which are the materials for constructing such a reinforcing bar composition, have so far mainly been performed by cutting and bending deformed reinforcing bars directly in a place away from the construction site such as a factory. The so-called “on-site method” is generally transported to the site and assembled and bundled in the vertical and horizontal directions by one specialized rebar worker. In some cases, a large number of rebars that have been cut and bent are bundled while being welded in a factory or the like, and a certain part is transported to the construction site and combined and bound at the construction site. In some cases, a “pre-assembled processing” method is employed.
[0003]
[Problems to be solved by the invention]
However, “on-site construction” generally involves construction in places where the scaffolding and working environment are not favorable, and it is difficult to carry in and move the welding machine, resulting in poor work efficiency and high cost. Also, it is not preferable from the viewpoint of safety and hygiene. On the other hand, “pre-assembled machining” can eliminate some of the difficulties of construction on site, but it is easy to cause cross-sectional defects at the welded part of the rebar because it forms the desired shape while welding each part of the rebar. As a result, the strength of the reinforcing bar inherently deteriorates easily.
[0004]
[Means for Solving the Problems]
However, in the civil engineering and construction industry, where competition for price reduction is intense, the need for so-called “prefabricated processing”, which is advantageous in terms of cost and safety compared to “on-site construction method”, is now increasing. Therefore, in the present invention, in order to be able to perform construction quickly, easily, and safely at the construction site, a pre-fabrication method in which a rebar framework is completed to some extent in advance in a factory or the like, and the original strength of the rebar is increased. In particular, the invention of claim 1 is directed to an arbitrary crossing portion of reinforcing bars in a composition formed by composing a plurality of reinforcing bars. A reinforcing bar composition characterized in that it is formed by covering a block mold covering the part and filling and solidifying a solidified material in the block mold to form a spacer combined form block to retain the composition. About the body.
[0005]
According to a second aspect of the present invention, there is provided the reinforcing bar composition according to the first aspect, wherein the block form is a hollow box-like body formed by forming a U-shaped groove straddling the protruding reinforcing bar. About. Furthermore, the invention of claim 3 relates to the reinforcing bar composition according to claim 1 in which the consolidated material filled in the block mold placed on the crossing portion of the reinforcing bar is concrete or mortar. Furthermore, the invention of claim 4 relates to the reinforcing bar composition of reinforcing bar according to claim 1, wherein the consolidating material filled in the block mold placed over the crossing portion of the reinforcing bar is a room temperature curable adhesive. .
[0006]
Furthermore, the invention of claim 5 is a composition obtained by composing a large number of reinforcing bars, and a block mold covering the intersecting portion is covered at an arbitrary intersecting portion of the reinforcing bars in the composition, and the block forming frame. The present invention relates to a prefabricated processing method of a reinforcing bar composition characterized in that a composition block is formed by filling and solidifying a solidified material therein to form a spacer combined form block. Furthermore, the invention of claim 6 is the pre-assembly of the reinforcing bar composition according to claim 5, wherein the block form is an internal hollow box-like body formed by forming a U-shaped groove straddling the protruding reinforcing bar. It relates to a processing method.
[0007]
Furthermore, the invention of claim 7 relates to a method for prefabricating a reinforcing bar composition according to claim 5, wherein the solidified material filled in the block mold placed on the intersection of the reinforcing bars is concrete or mortar. . Furthermore, the invention of claim 8 is a prefabricated reinforcing bar composition according to claim 5, wherein the solidifying material filled in the block mold placed on the intersection of the reinforcing bars is a room temperature curable adhesive. It relates to a processing method.
[0008]
In the above-described configuration, a rebar composition is formed by combining a number of straight reinforcing bars cut into a predetermined size or bent, and the crossing portion is formed at any crossing portion of the reinforcing bars to be joined. Cover and fix a block form to cover, and then fill and solidify a solidified material such as ready-mixed concrete or mortar into the block form to form a spacer combined form block to retain the entire composition As a result, a desired reinforcing bar composition for columns, beams or piers can be obtained. In addition, the reinforcing bar composition obtained as a pre-assembly in a factory or the like is transported to the construction site as it is and used for construction.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the following, the specific contents of the present invention will be described based on the embodiments shown in the drawings. Reference numeral 1 represents an example of a reinforcing bar composition pre-assembled by the processing method of the present invention, and FIG. The whole structure of the reinforcing bar composition for the material is shown. Further, the processing method of the reinforcing bar composition 1 will be described below by taking the above-mentioned reinforcing bar composition 1 for a beam material as a processing example. Reference numeral 2 represents a main reinforcing bar, 3 represents a hoop, and 6 represents a spacer combined form block. As shown in FIG. 2, a large number of hoop bars 3 are prepared by bending a straight reinforcing bar into a rectangular shape so that both end portions 3 a and 3 b overlap each other.
[0010]
Also, a plurality of main reinforcing bars 2 obtained by cutting a straight reinforcing bar into a predetermined size (eight per part in the embodiment of FIG. 2) are prepared. First, the hoop bars 3 formed in the above-described square shape are arranged in a certain direction and arranged at predetermined intervals, and at the four corners of each hoop bar 3 and the middle part of each side. The above-described eight main bars 2 are arranged so that the main bars 2 are parallel to each other, and at the intersections where the hoop bars 3 are joined are temporarily fixed with a thin wire or the like, the desired bar arrangement as a whole. A reinforcing bar composition comprising: In this case, both end portions 3a and 3b of each hoop muscle 3 are joined so as to straddle the main muscle 2 (see FIG. 2).
[0011]
In this case, it is preferable to use a jig 4 as shown in FIG. 2 when arranging a large number of hoop muscles 3 in a certain direction. That is, the jig 4 is continuous with the base 4a having a certain length and the length of the base 4a when they are planted facing each other on the base 4a at a predetermined interval. The side walls 5 and 5a are configured such that one side wall 5a is movable in the width direction of the base 4a, whereby the distance between the left and right side walls 5 and 5a can be adjusted.
[0012]
After arranging a plurality of rectangular hoop bars 3 formed at regular intervals between the side walls 5 and 5a of the jig 4, the main bars 2 are respectively connected to the inner side of the four corners of each hoop bar 3 and the middle of each side. Arranged while temporarily fixed by, for example, forming a skeleton of the reinforcing bar composition, and an arbitrary crossing portion of the reinforcing bar by the main bar 2 and the hoop bar 3 necessary for retaining the entire reinforcing bar composition (see FIG. 2). In the embodiment, the block mold 6a covering the intersecting portion is put on the hoop muscle 3 located at both ends constituting the reinforcing bar composition, and the block form frame 6a covering the intersecting portion is covered, and this is temporarily fixed with a wire or the like, and By filling and solidifying the solidified material 10 in the block mold 6a, the spacer combined form block 6 is formed to retain the shape of the entire reinforcing bar composition.
[0013]
It is not always necessary to attach the block mold 6a to the combined structure that is temporarily fixed with a wire or the like in the jig 4, and this is taken out from the jig 4 and the reinforcing bars to be joined are attached. After the block mold 6 is attached at an arbitrary intersection, the block material 6a may be filled and solidified with the consolidated material 10.
[0014]
The block form 6a is made of a metal as shown in FIG. 3 and has a bottomed inner hollow box-like body. Further, the rising side wall from the bottom has a reinforcing bar on the opposite side wall. The U-shaped grooves 7 and 7 with one end opened upward, and the side wall in the direction intersecting with the U-shaped grooves 7 and 7 that also straddled the reinforcing bar are opened with one end opened upward. Each groove 8 is formed.
[0015]
Next, a description will be given of the connection of each crossing portion of the reinforcing bars using the spacer combined form block 6. As shown in FIG. 4, the block form frame 6 a is formed so as to cover the intersecting portion of the hoop bar 3 and the main bar 2. Cover. In this case, the main bar 2 protruding with the grooves 7 and 7 and the hoop bar 3 protruding with the groove 8 are straddled and covered, and then temporarily fixed using an appropriate material such as a wire or a string. To do.
[0016]
Further, each of the block molds 6a attached is filled with a caking material 10, and this is allowed to pass through a certain curing period to be solidified, thereby forming a spacer combined mold block 6 to form each crossing portion of the reinforcing bar. As a result, the reinforcing bar composition 1 can be completed. In addition, as the solidifying material 10 used here, ready-mixed concrete and mortar are generally used, but in addition to this, the intersection of the hoop muscle 3 and the main reinforcement 2 such as a room temperature curable adhesive or resin is used. Any material that can be sufficiently consolidated can be used.
[0017]
FIG. 5 shows another embodiment of the spacer combined form block 6 that can be used in the present invention. That is, the spacer combined form block 6A is a block body having a substantially cubic shape with a certain size capable of covering the intersection of the main reinforcement 2 and the hoop reinforcement 3 in the reinforcing bar composition 1. Is formed by a concrete block or the like, and has a groove 8a having a substantially U-shaped cross-section that is larger than the diameter of the hoop muscle 3 and that is open on the end face of the block body. A groove 7a having a substantially U-shaped cross section that is larger than the diameter of the main muscle 2 and that opens at the end face of the block body is formed.
[0018]
In the case where the entire reinforcing bar composition 1 is shaped using the spacer combined form block 6A shown in FIG. 5, the material of the spacer combined form block 6A is used at the intersection of the hoop 3 and the main rebar 2 as shown in FIG. Then, the grooves 8a and 7a are filled and solidified with a solidified material 10 such as mortar or resin adhesive, respectively, and the intersection of the hoop muscle 3 and the main reinforcement 2 as shown in FIG. To be integrated.
[0019]
As described above, the reinforcing bar composition 1 is pre-assembled in a factory or the like in advance and transported to a construction site, and can be immediately used as a reinforcing bar structure by installing it at a predetermined location on the construction site. . Specifically, as illustrated in FIG. 7, the installed reinforcing steel composition 1 is covered with a mold frame 9, cast concrete is poured into the mold frame 9, and dried at room temperature to form a predetermined column or Construction of beams etc. can be completed.
[0020]
In this case, since the spacer combined formwork block 6 or 6A is interposed between the formwork 9 and the reinforcing bar structure 1, it is possible to save the trouble of interposing a spacer again, as shown in FIG. Thus, even when the reinforcing bar structure 1 is temporarily placed on the ground E or when the reinforcing bar structure 1 is installed on the ground E, a fixed gap between the ground E and the ground E should be maintained by the spacer combined form block 6 or 6A. Therefore, it is not necessary to interpose a separate spacer, and the work of pulling the suspension wire with a crane becomes simple. In addition, the forklift pawl is easy to enter at the time of factory shipment, and the handleability is excellent.
[0021]
【The invention's effect】
As described above, the present invention covers a block form frame covering the crossing portion at an arbitrary crossing portion of the rebar in the composition constituted by composing a large number of rebars, and the consolidation material in the block formwork. In order to retain the composition by forming a spacer combined form block by filling and solidifying, there is no strength deterioration due to cross-sectional defects due to welding as in the case of the conventional construction method, The product yield rate can be improved, and so-called pre-assembly is possible, so on-site construction is simple and can be done in a short period of time, reducing harsh, dangerous and unsanitary on-site work at low cost. Can also be achieved. In addition, safety at the construction site is greatly improved.
[0022]
Furthermore, in the pre-assembled reinforcing bar composition, there is a spacer combined form block at each joint between the main reinforcement and the hoop reinforcement, so it is time and effort to interpose a separate spacer between the formwork attached at the construction site. Can be omitted. In addition, even when temporarily placing the reinforcing bar structure on the ground or when installing the reinforcing bar structure on the ground, a fixed gap between the ground and the ground can be maintained by the spacer combined formwork block. There is no need to interpose a spacer for facilitating the forklift nail insertion or for the work of pulling the wire rope for hanging the crane.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a reinforcing bar composition processed according to the present invention.
FIG. 2 is a perspective view showing an outline of a main part of a jig showing an example of assembling a reinforcing bar composition.
FIG. 3 is a perspective view showing an example of a block mold used in the present invention.
4 is a partial perspective view showing a coupling state of a cross coupling portion between a main muscle and a hoop muscle using the block mold of FIG. 3;
FIG. 5 is a perspective view showing another embodiment of a block mold used in the present invention.
6 is a partially enlarged perspective view showing a coupling state of a cross coupling portion between a main muscle and a hoop muscle using the block mold of FIG. 5;
FIG. 7 is a structural end view of a beam installed using a reinforcing bar composition pre-assembled according to the present invention.
FIG. 8 is a partial cross-sectional view showing a ground installation state of a reinforcing bar composition pre-assembled according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reinforcement structure 2 Main reinforcement 3 Hoop reinforcement 4 Jig 4a Base 5 Side wall 5a Side wall 6 Spacer combined form block 6a Block form frame 6A Spacer combined form block 7 Groove 7a Groove 8 Groove 8a Groove 9 Mold 10 Solid binder E Above the ground

Claims (8)

In a composition composed of a plurality of reinforcing bars, by covering the crossing part of the reinforcing bar with a block mold that covers the crossing part, and filling and solidifying a solidified material in the block mold A reinforcing bar composition comprising a spacer combined form block and a shape-retaining composition. The reinforcing bar composition according to claim 1, wherein the block form frame is a hollow box-like body formed by forming a U-shaped groove straddling the protruding reinforcing bar. The reinforcing bar composition according to claim 1, wherein the solidification material filled in the block mold placed on the intersection of the reinforcing bars is concrete or mortar. The reinforcing bar composition of the reinforcing bar according to claim 1, wherein the solidifying material filled in the block mold placed on the crossing portion of the reinforcing bar is a room temperature curable adhesive. A composition is formed by composing a large number of reinforcing bars, and an arbitrary crossing portion of the reinforcing bars in the composition is covered with a block mold covering the crossing, and a solidified material is filled in the block mold. A method for pre-assembly processing of a reinforcing bar composition, wherein the composition is retained by forming a formwork block that also serves as a spacer by solidification. The method for pre-assembly processing of a reinforcing bar composition according to claim 5, wherein the block form is an internal hollow box-like body formed by forming a U-shaped groove straddling the protruding reinforcing bar. The method for pre-fabricating a reinforcing bar composition according to claim 5, wherein the solidification material filled in the block mold placed on the crossing portion of the reinforcing bar is concrete or mortar. The method of pre-assembled processing of a reinforcing bar composition according to claim 5, wherein the solidifying material filled in the block mold placed on the crossing portion of the reinforcing bars is a room temperature curable adhesive.

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