JP2021147791A - Binding tool, and binding method - Google Patents

Abstract

To provide a binding tool capable of binding different two reinforcement materials simply and rigidly.SOLUTION: A binding tool of this invention binding at least two different first reinforcement materials and second reinforcement material comprises: a cylindrical first coating portion coating the first reinforcement material and composed of a heat-shrinkable resin or a resin composition; and a cylindrical second coating portion coating the second reinforcement material and composed of a heat-shrinkable resin or a resin composition. The binding tool includes a connection portion connecting the first coating portion and the second coating portion in a preferable embodiment.SELECTED DRAWING: Figure 8

Description

The present invention relates to a binding tool and a binding method suitable for binding a bar such as a fiber rod used as a reinforcing bar used for strengthening concrete or the like.

Conventionally, reinforcing bars have been embedded in concrete to reinforce the concrete. As shown in FIGS. 10 and 11, as the reinforcing bars, a reinforcing bar 100 in which a plurality of vertical bars 50A and a plurality of horizontal bars 50B are integrated in a grid pattern is widely used, and a plurality of reinforcing bars are widely used. The intersection C, which is the intersection of the muscle members 50A and 50B, is bound and fixed. Especially in the field of construction and civil engineering, reinforced concrete, that is, reinforcing bars using reinforcing bars as reinforcing bars are generally arranged inside the concrete, and the strength and durability are improved by combining concrete and iron as building materials. It is used.

In such reinforced concrete, various inventions have been made for binding two reinforcing bars constituting the reinforcing bar (see, for example, Patent Documents 1 and 2). Patent Document 1 is a reinforcing bar joint structure for joining reinforcing bars to each other at the intersections or branches of reinforcing bars of a reinforced concrete structure, and a plurality of binding wires are wound around the overlapping reinforcing bars at the intersections or branches and ends. By twisting and binding the parts together, the reinforcing bars are firmly tied together with the binding wires bundled in a flat plate shape or a rod shape, and a metal adhesive is injected into the gaps between the binding wires of the binding wire bundle to cure the reinforcing bars. Disclosed is a technique of integrating binding wires with each other, binding wire bundles with reinforcing bars, and reinforcing bars with each other by using a metal adhesive.

Further, Patent Document 2 uses a loop portion in which a plurality of reinforcing bars to be connected are arranged and a binding wire for connecting the reinforcing bars by twisting the loop portion in a state where the plurality of reinforcing bars are arranged. A technique for integrating reinforcing bars and reinforcing bars with each other is disclosed.

Reinforcing bars have a large weight (specific gravity), so when used in structures such as high-rise buildings where the weight load per unit area is large, it is necessary to design so that the weight of the reinforcing bars themselves can be maintained, which is a design constraint and high cost. It contributes to. In addition, when reinforcing bars are used as reinforcing bars for concrete, there is a problem that cement, which is a constituent of concrete, reacts with water from the outside and corrodes and loses strength after many years. .. Against this background, as a substitute for reinforcing bars, reinforced fiber rods using lightweight carbon fiber, basalt fiber, etc., which have excellent mechanical performance such as tensile strength and elastic modulus and corrosion resistance to acids and alkalis, are used as the reinforcing bar. Attempts have been made (for example, Patent Documents 3 and 4).

Japanese Unexamined Patent Publication No. 2003-13548 Japanese Unexamined Patent Publication No. 2008-12187 Japanese Unexamined Patent Publication No. 2012-136814 Japanese Unexamined Patent Publication No. 2012-251378

However, although the fiber rod as a reinforcing material has excellent tensile strength, the shear strength is not high as compared with the reinforcing bar. Therefore, if the metal binding wire used for the conventional reinforcing bar is used as it is for forming the reinforcing bar using the fiber rod as the reinforcing material, a part of the fibers constituting the fiber rod is cut by the binding wire and the strength is lowered. There was a problem to do. Further, after long-term use, the metal binding wire itself corrodes and expands, causing cracks and the like in the concrete, and as a result, there is a problem that the binding force of the fiber rod also decreases. As described above, in the reinforcing bar using the fiber rod as the reinforcing material, the technique for binding the two different fiber rods has not been studied. Further, it has been desired to develop a new binding tool for reinforcing bars (reinforcing bars, bamboo reinforcing bars, etc.) other than fiber rods.

The present invention has been made in view of the above points, and an object of the present invention is to provide a binding tool and a binding method capable of easily and firmly binding muscle materials such as two different fiber rods. Is what you do.

That is, the present invention relates to the following invention.
<1> A binding tool that binds at least two different first and second bars, and is a tubular first bar that covers the first bars and is made of a heat-shrinkable resin or resin composition. A binding tool comprising one covering portion and a tubular second covering portion that covers the second reinforcing material and is made of a heat-shrinkable resin or resin composition.
<2> The binding tool according to <1>, which has a connecting portion for connecting the first covering portion and the second covering portion.
<3> The second coating portion is integrally formed with the first coating portion so as to extend in a direction intersecting or parallel to the longitudinal direction of the first coating portion <1> or <2>. The binding tool described in.
<4> The binding tool according to <3>, wherein the second covering portion is integrally formed with the first covering portion so as to extend in a direction perpendicular to the longitudinal direction of the first covering portion.
<5> The binding tool according to any one of <1> to <4>, wherein the reinforcing material is a fiber rod.
<6> The binding tool according to any one of <1> to <5>, wherein the first coating portion and the second coating portion are made of a thermoplastic resin or a thermoplastic resin composition.
<7> The binding tool according to any one of <1> to <5>, wherein the first coating portion and the second coating portion are composed of a thermosetting resin or a thermosetting resin composition.
<8> A binding method for binding at least two different first and second bars, wherein the first bar is coated with a tubular first coating made of a heat-shrinkable resin or resin composition. The first coating step of coating with the portion and the second barbed material are coated with the tubular second coating portion made of a heat-shrinkable resin or resin composition integrally formed with the first coating portion. A bundling method including a second coating step and a heat shrinkage step of heat-shrinking the first coating portion and the second coating portion.
<9> The first coating portion and the second coating portion are composed of a thermoplastic resin or a thermoplastic resin composition, and by heating the first coating portion and the second coating portion, the first coating portion is formed. The binding method according to <8>, wherein the second covering portion is thermally shrunk to bind the first reinforcing material and the second reinforcing material.

According to the present invention, two different fiber rods and other muscle materials can be easily and firmly bound together.

It is a figure which shows an example of the carbon fiber rod which concerns on this embodiment. It is a perspective view which shows an example of the high strength fiber composite material which concerns on this embodiment. It is sectional drawing which shows an example of the high strength fiber composite material which concerns on this embodiment. It is a figure which shows the 1st example of the binding tool which concerns on this embodiment. It is a figure which shows the use example of the binding tool (1st example) which concerns on 1st example. It is a figure which shows the 2nd example of the binding tool which concerns on this embodiment. It is a figure which shows the use example of the binding tool (2nd example) which concerns on 2nd example. It is a figure which shows the binding tool (third example) which concerns on this embodiment. It is a figure which shows the use example of the binding tool (third example) which concerns on this embodiment. It is a top view for demonstrating the structure and structure of a reinforcing bar. It is sectional drawing for demonstrating the structure and structure of a reinforcing bar.

Hereinafter, the present invention will be described in detail by showing examples and the like, but the present invention is not limited to the following examples and the like, and can be arbitrarily modified and implemented without departing from the gist of the present invention. In addition, in this specification, "~" shall be used as an expression including numerical values or physical quantities before and after it.

The present invention is a binding tool that binds at least two different first and second reinforcements, and has a tubular shape that covers the first reinforcement and is made of a heat-shrinkable resin or resin composition. The present invention relates to a binding tool including a first coating portion and a tubular second coating portion that covers the second reinforcement and is made of a heat-shrinkable resin or resin composition. The first and second bars may be fiber rods or may be bars other than fiber rods. Examples of the reinforcing bar other than the fiber rod include reinforcing bars and bamboo bars.
Further, the present invention is a binding method for binding at least two different first and second bars, in which the first bar is made of a heat-shrinkable resin or resin composition in a tubular shape. The first coating step of coating with the first coating portion and the tubular second coating portion made of a heat-shrinkable resin or resin composition integrally formed with the second reinforcement with the first coating portion. The present invention relates to a bundling method including a second coating step of coating with, and a heat shrinkage step of heat-shrinking the first coating portion and the second coating portion.

Hereinafter, embodiments of the present invention will be described. In the following description, a carbon fiber rod formed from carbon fiber as an example of the reinforcing material to be used for the binding tool of the present invention will be described as an example, but the present implementation will be performed as the reinforcing material. The form is not limited to the carbon fiber rods, and fiber rods other than carbon fiber rods and fiber rods other than fiber rods such as reinforcing bars and bamboo bars can be used.

[Example of carbon fiber rod]
FIG. 1 is a diagram showing an example of a carbon fiber rod according to the present embodiment. FIG. 2 is a perspective view showing an example of a high-strength fiber composite material according to the present embodiment. FIG. 3 is a cross-sectional view showing an example of a high-strength fiber composite material according to the present embodiment.

First, the carbon fiber rod 5 which is an example of the fiber rod will be described with reference to FIG. The carbon fiber rod 5 shown in FIG. 1 is a rod-shaped material formed from carbon fiber as a raw material. The carbon fiber rod 5 has a strand structure in which a core high-strength fiber composite material 51a and six high-strength fiber composite materials 51b surrounding the high-strength fiber composite material 51a are twisted together. In the following description, when referring to either one of the high-strength fiber composite material 51a and 51b, it is also simply referred to as "high-strength fiber composite material 51". The length of the carbon fiber rod 5 is appropriately determined according to the size of the target reinforcing bar, but is usually about 1 m to several tens of m.

As shown in FIGS. 2 and 3, in the high-strength fiber composite material 51, thousands to hundreds of thousands of high-strength fiber yarns 52 (here, carbon fiber yarns) are bundled and twisted untwisted or loosely twisted. The high-strength fiber bundle 53 and the restraint fiber 54 (particularly see FIG. 3) which is covered on the peripheral surface of the high-strength fiber bundle 53 and restrains the high-strength fiber yarn 52 so as not to fall apart are the base resin (non-reliable). It is integrated and solidified by (shown). As the high-strength fiber yarn 52, any carbon fiber yarn such as PAN type and pitch type can be used. The outer diameter of the high-strength fiber bundle 53 is determined by the thickness and number of the high-strength fiber yarns 52 used, and is usually about 1 mm to 100 mm.

As the restraint fiber 54, for example, synthetic fibers such as polyamide (nylon and the like), vinylon, polyacrylic, polypropylene, vinyl chloride, aramid, polyamide, polyester and polyacetal, recycled fibers, natural fibers and the like are used. The base resin is, for example, a thermoplastic epoxy resin (phenoxy resin), a polyamide resin, a polyester resin, a polyvinyl alcohol resin, a PPS resin (polyphenylene sulfide), a PEEK resin (polyether ether ketone), an acrylic resin, or a vinyl chloride resin. , Vinylidene chloride resin, polyethylene resin, polypropylene resin and the like are used.

As described above, the fiber rod to be bound as the fiber rod to be bound according to the example according to the present embodiment has been described by an example of the carbon fiber rod, but the binding target in the present invention is not limited to the carbon fiber rod and has other configurations. It may be a fiber rod. For example, in the present embodiment, the carbon fiber rod 5 having a strand structure made of the high-strength fiber composite materials 51a and 51b is used, but the carbon fiber rod does not have to have a strand structure. Further, for example, as a carbon fiber rod, as disclosed in Reference 3 (Japanese Unexamined Patent Publication No. 2012-136814), a high-strength fiber composite material 51a made of carbon fiber as a core is used as an inner layer, and an intermediate layer is formed around the inner layer. And, a fiber rod provided with a protective layer on the outer layer may be used.

Further, the rod is not limited to the carbon fiber rod made of carbon fiber as a raw material, and may be a fiber rod made of other fiber as a raw material as long as the object of the present invention is not impaired. For example, as fibers other than carbon fibers, for example, glass fiber, basalt fiber, para-aramid fiber, meta-aramid fiber, ultrahigh molecular weight polyethylene fiber, polyarylate fiber, PBO (polyparaphenylene benzoxazole) fiber, PPS (polyphenylene sulfide). ) Fiber rods formed from fibers, polyimide fibers, fluorine fibers, PVA (polypoly alcohol) fibers and the like may be used. Further, the above-mentioned fibers (including carbon fibers) used in the fiber rod may be used alone or in combination of two or more.

Further, the binding tool of the present invention can also be used for muscle materials other than fiber rods. Examples of the reinforcing bar other than the fiber rod include reinforcing bars and bamboo bars.

[First example of binding tool]
FIG. 4 is a diagram showing a first example of the binding tool according to the present embodiment. The binding tool of the present embodiment is preferably used for reinforcing bars in which the reinforcing materials are orthogonal to each other. For example, the binding tool of the present embodiment includes a plurality of bar bars 50A (corresponding to the first bar bar) shown in FIGS. 10 and 11 and a plurality of bar bars 50B (corresponding to the second bar bar) orthogonal to the plurality of bar bars 50A. Is preferably used for binding the intersection C in the reinforcing bar 100 in which the above are integrated in a grid pattern.
In the following description, a carbon fiber rod will be taken as an example of the reinforcing bar, but the reinforcing bar will be a fiber rod other than the carbon fiber rod, or a reinforcing bar other than the fiber rod such as a reinforcing bar or a bamboo bar. Can be used.

The binding tool 1 shown in FIG. 4 has a configuration having a first covering portion 2 and a second covering portion 3. The first coating portion 2 and the second coating portion 3 are formed of a heat-shrinkable resin (heat-shrinkable resin), and a thermoplastic resin is used in the present embodiment. The thermoplastic resin has a higher heat shrinkage property than the thermosetting resin, and has an advantage that the fiber rod (muscle material) to be bound can be bound and fixed more strongly. Further, since plasticity is obtained by heating, it can be removed by heating again even after the fiber rod (muscle material) is bound and fixed. Examples of the heat-shrinkable thermoplastic resin include nylon resin, polyvinyl alcohol resin, polyethylene resin, polypropylene resin, polyether ether ketone (PEEK) resin, polyphenylene sulfide (PPS) resin, and acrylic resin from the viewpoint of durability against alkali. Vinyl chloride resin, vinylidene chloride resin, thermoplastic epoxy resin (phenoxy resin), urethane resin, polycarbonate resin, and resorcinol resin are suitable. The thermoplastic resin used may be a copolymer or mixture of a plurality of resins as long as the required heat shrinkage is obtained. Further, for example, a resin composition in which the strength is improved by mixing short fiber carbon fiber, glass fiber, cellulose nanofiber (CNF), basalt fiber, etc., whose fibers are short enough not to inhibit heat shrinkage, in the thermoplastic resin. It may be used as a thing (thermoplastic resin composition).

Further, as the heat-shrinkable resin, a heat-shrinkable thermosetting resin may be used instead of the thermoplastic resin. Thermosetting resins have advantages such as excellent heat resistance and hardness as compared with thermoplastic resins, the resin composition can be significantly changed, and the range of use as a reinforcing material is large. Preferred examples of the thermosetting resin that can be heat-shrinked include phenol resin, urea resin, melamine resin, unsaturated polyester, epoxy resin, silicon resin, and urethane resin. The thermosetting resin may be a copolymer or a mixture of a plurality of resins as long as the required heat shrinkage can be obtained. Further, a resin having improved strength by mixing, for example, short fiber carbon fiber, glass fiber, cellulose nanofiber (CNF), basalt fiber, etc., whose fibers are short enough not to inhibit heat shrinkage, in the heat-curable resin. It may be used as a composition (thermocurable resin composition).

The first coating portion 2 and the second coating portion 3 may be the same resin (resin composition) or different resins (resin composition), but are usually the same resin (resin). Composition) is used.

The first covering portion 2 is a cylindrical tubular body, and an opening portion 23 composed of a pair of opening edges 21 and 22 opened in the longitudinal direction of the side surface is formed. A second covering portion 3 extending in a direction perpendicular to the longitudinal direction of the first covering portion 2 is integrally formed at substantially the center of the first covering portion 2.
In the present embodiment, the inner diameter of the tubular portion of the first covering portion 2 is configured to be slightly larger than the outer diameter of the reinforcing material to be bound, and the first covering portion 2 covers the reinforcing material to be bound. Can be done. The first covering portion may be used as long as it can cover the reinforcing material to be bound, and if it can be deformed, the first covering portion having an inner diameter smaller than the outer diameter of the reinforcing material to be bound may be used.

The second covering portion 3 is a cylindrical tubular body, and has an opening 33 formed of a pair of opening edges 31 and 32 that are open in the longitudinal direction of the side surface. The second covering portion 3 has opening edges 34 and 35 continuous with the opening edges 21 and 22 of the first covering portion 2.
In the present embodiment, the inner diameter of the second coating portion 3 is formed to be slightly larger than the outer diameter of the carbon fiber rod 5 like the first coating portion 2 described above, and the second coating portion 3 is the carbon fiber rod 5. Can be coated. The second covering portion may be used as long as it can cover the reinforcing material to be bound, and if it can be deformed, the second covering portion having an inner diameter smaller than the outer diameter of the reinforcing material to be bound may be used.

As shown above, the binding tool 1 according to the first example is formed by integrally forming the first covering portion 2 and the second covering portion 3 extending in the direction perpendicular to each other, and is different from each other at right angles. Two streaks (carbon fiber rod 5 in this embodiment) can be coated. The sizes (length, thickness, etc.) of the first covering portion 2 and the second covering portion 3 constituting the binding tool 1 are arbitrary as long as the required binding force can be obtained, and are subject to binding. It may be determined as appropriate in consideration of the material, thickness, length, etc. of the reinforcing material. Further, as long as the first covering portion 2 and the second covering portion 3 extend in a direction intersecting each other, the first covering portion 2 and the second covering portion 3 are not limited to those extending in a right angle direction.

As described above, the binding tool according to the first example is a binding tool that binds at least two different reinforcing materials, the first reinforcing material (first fiber rod) and the second reinforcing material (second fiber rod). A tubular first coating portion made of a heat-shrinkable resin or resin composition, which covers the first reinforcement, and a heat-shrinkable resin or resin composition which covers the second reinforcement. The second covering portion is provided with a tubular second coating portion, and the second coating portion is integrated with the first coating portion so as to extend in a direction intersecting or perpendicular to the longitudinal direction of the first coating portion. The first coating portion has a first opening opening in the longitudinal direction of the side surface, and the second coating portion has a second opening opening in the longitudinal direction of the side surface and the first opening portion. One aspect of the present invention is characterized in that it has a pair of opening edges that form the same, and a third opening that is formed by a pair of opening edges that are formed in the second covering portion.

FIG. 5 is a diagram showing an example of using the binding tool according to the first example. Hereinafter, an example of using the binding tool 1 according to the first example will be described with reference to FIG.

First, as shown in FIG. 5A, the opening 23 of the first coating portion 2 is opened manually, and the first carbon fiber rod (first reinforcement) 5A is covered with the first coating portion 2. Next, as shown in FIG. 5B, the opening 33 of the second coating portion 3 is opened manually, and the second carbon fiber rod (second reinforcement) 5B is covered with the second coating portion 3. .. The first carbon fiber rod 5A and the second carbon fiber rod 5B correspond to the above-mentioned carbon fiber rod 5.

Subsequently, the binding tool 1 coated with the first carbon fiber rod 5A and the second carbon fiber rod 5B is heated by the steps shown in FIGS. 5 (a) and 5 (b).
Due to the heat shrinkage of the binding tool 1 in this heating process, the first coating portion 2 and the second coating portion 3 are fixed to the first carbon fiber rod 5A and the second carbon fiber rod 5B, respectively, and as a result, the binding is performed. The tool 1 binds and fixes the first carbon fiber rod 5A and the second carbon fiber rod 5B.

In this case, the heating conditions are such that the heat-shrinkable resin (or resin composition) constituting the first coating portion 2 and the second coating portion 3 contracts, and the temperature and time are such that the muscle material to be bound can be bound and fixed. In addition, it is appropriately determined according to the type of the heat-shrinkable resin (or resin composition) and the length and thickness of the first coating portion 2 and the second coating portion 3. The heating method is not particularly limited, and for example, heating may be performed using a conventionally known heating device such as a dryer or a drying device.

As described above, according to the binding tool 1 according to the first example, it is possible to easily and firmly bind and fix two different orthogonal carbon fiber rods 5A and 5B. The shapes of the first covering portion 2 and the second covering portion 3 and the angles formed by both covering portions (right angles in this first example) are not limited to the shapes and angles shown in FIG.

[Second example of binding tool]
FIG. 6 is a diagram showing a second example of the binding tool according to the present embodiment. In the following description, a carbon fiber rod will be taken as an example of the reinforcing bar, but the reinforcing bar will be a fiber rod other than the carbon fiber rod, or a reinforcing bar other than the fiber rod such as a reinforcing bar or a bamboo bar. Can be used.

The binding tool 1A shown in FIG. 6 has a configuration having a first covering portion 2A and a second covering portion 3A. The binding tool 1A is formed of the same resin material as the binding tool 1 described above.

The first covering portion 2A is a cylindrical tubular body, and an opening 23A composed of a pair of opening edges 21A and 22A opened in the longitudinal direction of the side surface is formed. The first covering portion 2 is formed integrally with the second covering portion 3A extending in a direction parallel to the longitudinal direction of the first covering portion 2A. In the present embodiment, the inner diameter of the first coating portion 2A is configured to be slightly larger than the outer diameter of the carbon fiber rod 5 described above, and the first coating portion 2A can coat the carbon fiber rod 5 from the outside. .. The first covering portion may be used as long as it can cover the reinforcing material to be bound, and if it can be deformed, the first covering portion having an inner diameter smaller than the outer diameter of the reinforcing material to be bound may be used.

The second covering portion 3A is a cylindrical tubular body, and an opening 33A composed of a pair of opening edges 31A and 32A opened in the longitudinal direction of the side surface is formed. In the present embodiment, the inner diameter of the second coating portion 3A is formed to be slightly larger than the outer diameter of the carbon fiber rod 5 like the first coating portion 2A described above, and the second coating portion 3A is the carbon fiber rod 5. Can be coated. The second covering portion may be used as long as it can cover the reinforcing material to be bound, and if it can be deformed, the second covering portion having an inner diameter smaller than the outer diameter of the reinforcing material to be bound may be used.

As shown above, the binding tool 1A according to the second example is formed by integrating the first covering portion 2A and the second covering portion 3A extending in the parallel direction, and is branched into different 2 The carbon fiber rod 5 of the book can be coated. The sizes (length, thickness, etc.) of the first covering portion 2A and the second covering portion 3A constituting the binding tool 1A are arbitrary as long as the required binding force can be obtained, and are subject to binding. It may be determined as appropriate in consideration of the material, thickness, length, etc. of the reinforcing material.

FIG. 7 is a diagram showing an example of using the binding tool according to the second example. Hereinafter, an example of using the binding tool 1A according to the second example will be described with reference to FIG. 7.

As shown in FIG. 7, the opening 23A of the first covering portion 2A is opened by hand or the like, the first carbon fiber rod 5C is covered by the first covering portion 2A, and the second covering portion 3A is manually or the like. The opening 33A of the above is opened, and the second carbon fiber rod 5D is covered with the second coating portion 3A. The first carbon fiber rod 5C and the second carbon fiber rod 5D correspond to the above-mentioned carbon fiber rod 5, but for convenience of explanation, the second carbon fiber rod 5D is bent in the middle. Shown.

Subsequently, the binding tool 1A coated with the first carbon fiber rod 5C and the second carbon fiber rod 5D is heated by the step shown in FIG. 7. Due to the heat shrinkage of the binding tool 1A in this heating process, the first coating portion 2A and the second coating portion 3A are fixed to the first carbon fiber rod 5C and the second carbon fiber rod 5D, respectively, and as a result, the binding is performed. The tool 1A binds and fixes the first carbon fiber rod 5C and the second carbon fiber rod 5D.

In this case, the heating conditions are a temperature and a time during which the heat-shrinkable resin (or resin composition) constituting the first coating portion 2 and the second coating portion 3 can be shrunk to bind and fix the muscle material to be bound. As described above, it is appropriately determined according to the type of the heat-shrinkable resin (or resin composition) and the length and thickness of the first coating portion 2 and the second coating portion 3. The heating method is not particularly limited, and for example, heating may be performed using a conventionally known heating device such as a dryer or a drying device.

As described above, according to the binding tool 1A according to the second example, the two different carbon fiber rods 5C and 5D that branch can be bound and fixed easily and firmly. The shapes of the first covering portion 2A and the second covering portion 3A are not limited to the shapes shown in FIG.

[Third example of binding tool]
FIG. 8 is a diagram showing a third example of the binding tool according to the present embodiment. In the following description, a carbon fiber rod will be taken as an example of the reinforcing bar, but the reinforcing bar will be a fiber rod other than the carbon fiber rod, or a reinforcing bar other than the fiber rod such as a reinforcing bar or a bamboo bar. Can be used.

The binding tool 1B shown in FIG. 8 has a configuration including a first covering portion 2B, a second covering portion 3B, and a connecting portion 4. The binding tool 1B is formed of the same resin material as the binding tool 1 described above. Further, FIG. 9 shows a diagram in which orthogonal fiber rods are connected using the binding tool 1B.

In the binding tool 1B, as shown in FIG. 8A, the first covering portion 2B and the second covering portion 3B are connected via the connecting portion 4. In the binding tool 1B, unlike the first example of the binding tool (binding tool 1) described above, the first covering portion 2B and the second covering portion 3B are not directly integrated, and the connecting portion 4 and the second covering portion 3B are not directly integrated. The first coating portion 2B and the second coating portion 3B are bonded by integrally forming each of the first coating portion 2B, the connecting portion 4, and the second coating portion 3B.

As shown in FIG. 8B, the binding tool 1B has an opening 23B opened in the side longitudinal direction of the first covering portion 2B and an opening 33B opened in the side longitudinal direction of the second covering portion 3B.

The constituent material of the connecting portion 4 may have characteristics (strength, elasticity, etc.) for connecting the first covering portion 2B and the second covering portion 3B, and is the same as the first covering portion 2B and the second covering portion 3B. It may be formed of a heat-shrinkable resin material or a non-heat-shrinkable material.

Further, the shape of the connecting portion 4 may not be the shape shown in FIG. 8 as long as it has characteristics (strength, elasticity, etc.) for connecting the first covering portion 2B and the second covering portion 3B. Further, in the binding tool 1B, as shown in FIG. 8A, the number of connecting portions 4 is two, but the present invention is not limited to this, and two or more connecting portions 4 may be formed depending on the purpose.

FIG. 9 is a diagram showing a usage example of the binding tool 1B according to the third example.

The opening 23B of the first covering portion 2B is opened by hand or the like, and the first carbon fiber rod 5E is covered with the first covering portion 2B. Next, the opening 33B of the second covering portion 3 is opened by hand or the like, and the second carbon fiber rod 5F is covered with the second covering portion 3B. The first carbon fiber rod 5E and the second carbon fiber rod 5F correspond to the above-mentioned carbon fiber rod 5.

Subsequently, the binder 1B coated with the first carbon fiber rod 5E and the second carbon fiber rod 5F is heated.
Due to the heat shrinkage of the binding tool 1B in this heating process, the first coating portion 2B and the second coating portion 3B are fixed to the first carbon fiber rod 5E and the second carbon fiber rod 5F, respectively, and as a result, the binding is performed. The tool 1B binds and fixes the first carbon fiber rod 5E and the second carbon fiber rod 5F.

In this case, the heating conditions are such that the heat-shrinkable resin (or resin composition) constituting the first coating portion 2B and the second coating portion 3B contracts, and the temperature and time are such that the fiber rods can be bound and fixed. It is appropriately determined according to the type of shrinkable resin (or resin composition) and the length and thickness of the first coating portion 2B and the second coating portion 3B. The heating method is not particularly limited, and for example, heating may be performed using a conventionally known heating device such as a dryer or a drying device.

In the present embodiment, the entire carbon fiber rods 5E and 5F are not covered by the first coating portion 2B and the second coating portion 3B, but the heat shrinkage constituting the first coating portion 2B and the second coating portion 3B is formed. It can be firmly fixed by shrinkage of the sex resin (or resin composition).
The entire carbon fiber rod may be covered with the first coating portion 2B and the second coating portion 3B in the same manner as in the first example of the binding tool (binding tool 1) described above.

As described above, according to the binding tool 1B according to the third example, two different orthogonal carbon fiber rods 5E and 5F can be easily and firmly bound and fixed. The shapes of the first covering portion 2B and the second covering portion 3B and the angles formed by both covering portions (right angles in the third example) are not limited to the shapes and angles shown in FIG.

Further, although not shown, a connecting portion may be formed on the binding tool 1A according to the second example described above. In this case, the connecting portion may be formed on the opposite side of the parallel first covering portion 2A and the second covering portion 3A where the openings 23A and 33A are formed. The constituent material and shape of the connecting portion need only have characteristics (strength, elasticity, etc.) for connecting the first covering portion 2B and the second covering portion 3B, and can be appropriately selected according to the purpose. The number of connecting portions may be one, but it is preferable to form two or more connecting portions in order to increase the first covering portion 2A and the second covering portion 3A.

Although the embodiments of the present invention have been described above, the above-described embodiments show application examples of the present invention, and the technical scope of the present invention is not intended to be limited to the specific configurations of the above-described embodiments. In particular, in the embodiments disclosed this time, matters not explicitly disclosed, for example, dimensions, weights, volumes, etc. of specific components do not deviate from the range normally practiced by those skilled in the art, and are ordinary. A person skilled in the art can adopt a value that can be easily assumed.

1, 1A, 1B Bundling tool 2, 2A, 2B 1st covering part 3, 3A, 3B 2nd covering part 4 Connecting part 5 Carbon fiber rod (barrel)
5A, 5C, 5E 1st carbon fiber rod (1st reinforcement)
5B, 5D, 5F Second carbon fiber rod (second reinforcement)
50A Lumber (Vertical Lumber)
50B muscle material (horizontal muscle)
100 Lattice reinforcing bar C intersection

Claims (9)

A binding tool that binds at least two different first and second bars.
A tubular first coating portion that covers the first reinforcement and is made of a heat-shrinkable resin or resin composition.
A tubular second coating portion that covers the second reinforcement and is made of a heat-shrinkable resin or resin composition.
A binding tool characterized by being equipped with. The binding tool according to claim 1, further comprising a connecting portion for connecting the first covering portion and the second covering portion. Claim 1 or 2 is characterized in that the second coating portion is integrally formed with the first coating portion so as to extend in a direction intersecting or parallel to the longitudinal direction of the first coating portion. The binding tool described in. The binding tool according to claim 3, wherein the second covering portion is formed integrally with the first covering portion so as to extend in a direction perpendicular to the longitudinal direction of the first covering portion. The binding tool according to any one of claims 1 to 4, wherein the reinforcing material is a fiber rod. The binding tool according to any one of claims 1 to 5, wherein the first coating portion and the second coating portion are composed of a thermoplastic resin or a thermoplastic resin composition. The binding tool according to any one of claims 1 to 5, wherein the first coating portion and the second coating portion are composed of a thermosetting resin or a thermosetting resin composition. A binding method that binds at least two different first and second bars.
The first coating step of coating the first reinforcement with a tubular first coating made of a heat-shrinkable resin or resin composition, and the second reinforcement integrally with the first coating. A second coating step of coating with a tubular second coating portion made of the formed heat-shrinkable resin or resin composition, and a heat-shrinking step of heat-shrinking the first coating portion and the second coating portion. Bundling methods, including. The first coating portion and the second coating portion are composed of a thermoplastic resin or a thermoplastic resin composition, and by heating the first coating portion and the second coating portion, the first coating portion and the first coating portion are heated. (Ii) The binding method according to claim 8, wherein the covering portion is thermally shrunk to bind the first reinforcing material and the second reinforcing material.

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