JP6994909B2 - Reinforcing bar members and reinforced concrete structures using the reinforcing bar members - Google Patents

Description

The present invention relates to a reinforced concrete member used for a reinforced concrete structure, and more particularly to a structure of a connection portion between the reinforced concrete members and a reinforced concrete structure using the reinforced concrete member.

Conventionally, when constructing, repairing, and reinforcing a structure with a reinforced concrete structure, a technology was devised to bring a flat plate-shaped reinforcing bar member having a lattice shape processed at the factory to the site and install it at a predetermined position on the site. Has been done.

In the construction of such a conventional reinforcing bar member, the lattice-shaped reinforcing bar member is arranged along the surface of the structure such as a beam, a floor, or a column of the structure at a predetermined distance, and a mortar or the like is placed on the lattice-shaped reinforcing bar member. Spray the filler. The filler fills the space between the reinforcing bar member and the structure, and further covers the reinforcing bar member so that the thickness of the filler from the reinforcing bar member becomes a predetermined dimension. With such a structure, the process of assembling reinforcing bars such as steel bars by technicians on site and the process of welding reinforcing bars at the factory are not required, which reduces the labor and cost of assembling the reinforcing bars and eliminates the need to secure technicians. Become. Further, the load-bearing performance of the reinforced concrete structure is improved by the lattice-shaped reinforcing bar members (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-79585

In the reinforcing bar member disclosed in Patent Document 1, the dimensions of the reinforcing bar member are limited to a certain size due to the circumstances such as the material for manufacturing the reinforcing bar member and the processing conditions of the reinforcing bar member. Therefore, depending on the size of the structure in which the reinforcing bar members are arranged, a plurality of reinforcing bar members are arranged side by side along the surface of the structure. In this case, in order to secure the strength of the portion between the adjacent reinforcing bar members, at least one square of the lattice shape of the reinforcing bar members is arranged so that the adjacent reinforcing bar members overlap each other. However, the thickness of the filler such as mortar filled between the surface of the structure and the reinforcing bar member and the thickness of the filler covering the outside of the reinforcing bar member need to be a predetermined thickness from the viewpoint of strength and durability. become. Therefore, when a plurality of reinforcing bar members are arranged, the joint portion between the adjacent reinforcing bar members must be thickened from the surface of the structure to the surface after the filler is applied by the amount of the overlapping of the reinforcing bar members. There was a problem that it had to be.

The present invention has been made to solve the above-mentioned problems, and when a plurality of lattice-shaped reinforcing bar members are arranged side by side and embedded in a structure, the reinforcing bar members that can be arranged without overlapping the reinforcing bar members and the reinforcing bar members thereof are provided. It is intended to provide the used reinforced concrete structure.

The reinforcing bar member according to the present invention is formed of a grid-like plate having a plurality of main reinforcing bars arranged in parallel with each other and a plurality of force distribution reinforcing bars connecting between the plurality of adjacent main reinforcing bars. It is a reinforcing bar member and includes an engaging portion that protrudes from the end surface of the lattice-shaped plate, and the engaging portion is a direction along the surface of the lattice-shaped plate and a direction in which the engaging portion protrudes. It is provided with an engaging claw that protrudes in one direction so as to intersect with the other.

The reinforcing bar member according to the present invention is formed of a grid-like plate having a plurality of main reinforcing bars arranged in parallel with each other and a plurality of force distribution reinforcing bars connecting between the plurality of adjacent main reinforcing bars. A reinforcing bar member, the main bar portion includes an arm portion extending toward the adjacent main bar portion at an end portion of the lattice-shaped plate, and the tip portion of the arm portion is an adjacent main bar portion. It is arranged with a gap larger than the width of the main bar portion between the and.

According to the reinforced concrete structure according to the present invention, the above-mentioned reinforced concrete members are arranged in concrete as structural members.

According to the reinforced concrete member according to the present invention and the reinforced concrete structure using the reinforced concrete member, a plurality of reinforced concrete members can be arranged side by side while ensuring the load-bearing performance of the reinforced concrete structure more than before by the above configuration. , Adjacent reinforcing bar members can be connected without overlapping. This eliminates the need for the surface of the reinforced concrete structure to partially protrude and the filler covering the reinforcing bar member to be larger than a predetermined thickness. Therefore, the surface of the reinforced concrete structure after construction can be flattened, and the overall dimensions of the reinforced concrete structure after construction can be reduced. In addition, the amount of filler required for embedding the reinforcing bar member in the reinforced concrete structure can be reduced.

It is a top view of the reinforcing bar member which concerns on Embodiment 1. FIG. It is an enlarged view of the part A of FIG. It is a perspective view which shows an example of the case where the reinforced concrete member which concerns on Embodiment 1 is applied to the existing reinforced concrete structure. It is a schematic diagram which shows the cross section of the CC part of FIG. It is a schematic diagram which shows the cross section of the joint part of the reinforcing bar member when the conventional reinforcing bar member is used. It is a top view of the reinforcing bar member which concerns on Embodiment 2. FIG. It is an enlarged view of the part D of FIG. It is a top view of the reinforcing bar member which concerns on Embodiment 3. FIG. It is a top view which showed the arrangement example of the reinforcing bar member which concerns on Embodiment 3. FIG. It is a top view which showed the arrangement example of the reinforcing bar member which concerns on Embodiment 4. FIG. It is an enlarged view of the E part of FIG. It is sectional drawing which showed the arrangement example of the reinforcing bar member which concerns on Embodiment 4. FIG. It is an enlarged view of the F part of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the parts with the same reference numerals represent the same or corresponding parts, which are common to the entire text of the specification. Further, the form of the component appearing in the entire specification is merely an example, and the present invention is not limited to the description in the specification. In particular, the combination of components is not limited to the combination in each embodiment, and the components described in other embodiments can be applied to another embodiment. Further, when it is not necessary to particularly distinguish or specify a plurality of parts of the same type that are distinguished by a subscript, the subscript may be omitted. Further, in the drawings, the relationship between the sizes of the constituent members may differ from the actual one.

The reinforcing bar member according to the present invention is used for columns, beams, slabs, bridge piers, girders, decks, etc. of reinforced concrete structures. Reinforcing bar members are also used in civil engineering structures such as tunnel lining concrete, floodgates, and waterways. Further, the reinforcing bar member is not only applied to a newly constructed reinforced concrete structure, but is also used for post-casting concrete or the like for an existing reinforced concrete structure.

Embodiment 1.
FIG. 1 is a plan view of the reinforcing bar member 100 according to the first embodiment. First, the shape of the reinforcing bar member 100 according to the first embodiment will be described. Here, FIG. 1 shows the periphery of the end faces 11 of the lattice-shaped reinforcing bar members 100A and 100B. The reinforcing bar member 100A is configured in a grid pattern by intersecting the main reinforcing bar portion 10A extending in the left-right direction in FIG. 1 and the force distribution reinforcing bar portion 20A extending in the vertical direction in FIG. In the first embodiment, the main muscle portion 10A and the force distribution muscle portion 20A are orthogonal to each other, but the present invention is not limited to this embodiment. If a plurality of main bar portions 10A extend in parallel and are connected between the plurality of main bar portions 10A, the direction in which the force distribution bar portion 20A extends can be appropriately set with an angle with respect to the direction in which the main bar portion 10A extends. The reinforcing bar member 100B has the same configuration as the reinforcing bar member 100A.

In the reinforcing bar member 100A, the engaging portion 50A protrudes from the end surface 11A. The reinforcing bar member 100A and the reinforcing bar member 100B are arranged side by side next to each other, and the engaging portion 50A and the engaging portion 50B are engaged and connected to each other. Hereinafter, the engaging portion 50A and the engaging portion 50B are collectively referred to as an engaging portion 50. In FIG. 1, the left-right direction is the direction in which the main bar portion 10 extends, and the vertical direction is the direction in which the force distribution bar portion 20 extends. In the first embodiment, the engaging portion 50 will be described in a form in which the force distribution bar portion 20 protrudes in the extending direction, but the engaging portion 50 may protrude from the end face 21 in the extending direction of the main bar portion 10.

FIG. 2 is an enlarged view of part A in FIG. The engaging portion 50A protrudes from the end surface 11A in the direction in which the force distribution muscle portion 20A extends. The engaging claws 51Aa, 51Ab, and 51Ac project in one direction intersecting the direction in which the engaging portion 50A protrudes. That is, in FIG. 1, the engaging claws 51Aa, 51Ab, and 51Ac project in the direction in which the main bar portion 10A extends. This has the same configuration in the engaging portion 50B of the reinforcing bar member 100B. The engaging portion 50A of the reinforcing bar member 100A and the engaging portion 50B of the reinforcing bar member 100B have a shape in which the engaging claws 51 face each other with the protruding sides facing each other. Further, the engaging portion 50A and the engaging portion 50B engage with each other with the engaging claw 51Aa and the engaging claw 51Bc, the engaging claw 51Ab and the engaging claw 51Bb, and the engaging claw 51Ac and the engaging claw 51Ba. There is. Hereinafter, the engaging claws 51Aa, 51Ab, and 51Ac of the engaging portion 50A are collectively referred to as an engaging claw 51A. Similarly, the engaging claws 51Ba, 51Bb, 51Bc of the engaging portion 50B are collectively referred to as an engaging claw 51B.

The engaging claws 51A are provided at three locations on each engaging portion 50A. The engaging claws 51Aa, 51Ab, and 51Ac of the engaging portion 50A are arranged at equal intervals in the direction in which the force distribution muscle portion 20 extends. The engaging claws 51Aa, 51Ab, and 51Ac are arranged so as to be offset at equal intervals in the direction in which the main bar portion 10 extends. The arrangement of the engaging claws 51 is similarly arranged in the engaging portion 50B. The central portion of the engaging surface 52Ab of the engaging claw 51Ab arranged at the center of the engaging portion 50A is located above the center line 25 of the force distribution muscle portion 20. Further, the central portion of the engaging surface 52Bb of the engaging claw 51Bb arranged in the center of the engaging portion 50B is also located on the center line 25 of the force distribution bar portion 20. That is, the coordinates of the positions where the three engaging claws 51A provided on the engaging portion 50A and the three engaging claws 51B provided on the engaging portion 50B are engaged are averaged. It is located on an extension of the center line 25 of the force distribution bar portion 20. In other words, the center of the plurality of engaging surfaces 52 included in the engaging portion 50 is on an extension of the center line 25 of the force distribution muscle portion 20. With this configuration, when a force is applied to separate the engaging portion 50A and the engaging portion 50B in the direction in which the force distribution muscle portion 20 extends, the engaging portion 50A moves in the direction of the arrow 55A in FIG. , It is possible to prevent the engaging portion 50B from falling in the direction of the arrow 55B in FIG. When a force is applied to the engaging portion 50A and the engaging portion 50B in the direction in which the force distribution muscle portion 20 extends, the engaging claw 51A of the engaging portion 50A and the engaging claw 51B of the engaging portion 50B are engaged with each other. It tries to move away in the direction of disengagement, that is, in the direction in which the main bar 10 extends. However, in the engaging portion 50A, the force applied to each of the engaging claws 51Aa, 51Ab, and 51Ac can be received by the force distribution bar portion 20, so that the main bar portion 10 forming the end surface 11A of the reinforcing bar member 100A is bent. Therefore, it is possible to suppress deformation such that the engaging portion 50A falls in the direction of the arrow 55A. The center of the plurality of engaging surfaces 52 is preferably located on the center line 25 of the force distribution bar portion 20, but it can also be configured by removing it from the center line 25. For example, at least one of the plurality of engaging surfaces 52 may be configured to be located on the center line 25 of the force distribution bar portion 20.

The engaging claw 51 includes an engaging surface 52. Hereinafter, the engaging surfaces 52Aa, 52Ab, and 52Ac of the engaging portion 50A are collectively referred to as an engaging surface 52A. The engaging surfaces 52Ba, 52Bb, 52Bc of the engaging portion 50B are collectively referred to as an engaging surface 52B. Further, the engaging surface 52A and the engaging surface 52B are collectively referred to as an engaging surface 52. The engaging surface 52 is provided so as to face the end surface 11. The engaging surface 52 is inclined by a predetermined angle with respect to the extending direction of the end surface 11 of the reinforcing bar member 100, and is inclined so as to approach the end surface 11 of the reinforcing bar member 100 toward the tip of the engaging claw 51. ing. Therefore, when a force is applied to separate the engaging portion 50A and the engaging portion 50B in the direction in which the force distribution bar portion 20 extends, the engaging surface 52A of the engaging portion 50A and the engaging surface 52B of the engaging portion 50B Are in contact with each other and are caught in the direction in which the engaging claw 51A and the engaging claw 51B are separated from each other, so that the engagement is not easily disengaged.

FIG. 3 is a perspective view showing an example of a case where the reinforcing bar member 100 is applied to the existing reinforced concrete structure 510. In FIG. 3, the reinforcing bar members 100A and 100B are arranged on the upper surface of the floor slab 550 of the existing reinforced concrete structure 510, and the engaging portions 50 are engaged with each other in the portion B in FIG. In FIG. 3, the reinforcing bar members 100A and 100B are schematically shown. As shown in FIG. 3, the reinforcing bar member 100 is arranged on the surface of the existing reinforced concrete structure 510, is covered with a filler 80 such as mortar from above, and is embedded in the reinforced concrete structure 500. In the first embodiment, reinforcement of the floor slab 550 will be described as an example, but the present invention is not limited to this embodiment. A plurality of reinforcing bar members 100 may be installed side by side according to the shapes of columns 560, beams 570, etc. of the reinforced concrete structure 500, and the engaging portions 50 may be engaged with each other at the ends. In this case, the main bar portion 10 and the force distribution bar portion 20 are arranged so as to be located on the same surface along the surface of the column 560 or the like. Further, if the engaging claws 51 are engaged with each other, the reinforcing bar member 100A and the reinforcing bar member 100B are formed in the vertical direction of the surface of the surface formed by the intersection of the main reinforcing bar portion 10 and the force distribution reinforcing bar portion 20 (for example, FIG. In No. 3, it is permissible even if there is a deviation (perpendicular to the surface of the floor slab 550).

FIG. 4 is a schematic view showing a cross section of the portion CC of FIG. The reinforcing bar member 100 is arranged at a predetermined distance t2 from the surface of the existing reinforced concrete structure 510. The distance t2 is, for example, 10 mm, and the reinforcing bar member 100 is temporarily fixed at that position. In this state, the filler 80 such as mortar is sprayed on the upper surface of the floor slab 550, and the filler 80 is filled in the space between the reinforcing bar member 100 and the existing reinforced concrete structure 510. Further, the outside of the reinforcing bar member 100 is also covered with a filler 80 having a predetermined thickness (hereinafter, may be referred to as “cover thickness”). The distance t1 from the reinforcing bar member 100 to the surface of the filler 80 is, for example, 10 mm, and the filler 80 is sprayed onto the reinforcing bar member 100 so as to be covered with the thickness of the distance t1.

FIG. 5 is a schematic view showing a cross section of a joint portion of the reinforcing bar member 600 when the conventional reinforcing bar member 600 is used. FIG. 5 shows a portion corresponding to the CC portion of FIG. 3 in the reinforced concrete structure 501 using the conventional reinforced concrete member 600. When the conventional reinforcing bar member 600 is applied to the existing reinforced concrete structure 510, it is necessary for the plurality of reinforcing bar members 600 to form a joint portion at a portion corresponding to B in FIG.

As shown in FIG. 5, the lattice-shaped reinforcing bar members 600A and 600B do not have the engaging portion 50 at the end portion. Therefore, when the reinforcing bar members 600A and 600B are arranged side by side, it is necessary to arrange the end portions of the joint portion so as to overlap each other in the thickness direction. With this configuration, the strength is ensured by the adhesive force between the reinforcing bar members 600A and 600B and the filler 80. However, in order to secure the strength of the structure, the distance from the surface of the existing reinforced concrete structure 510 to the reinforcing bar members 600A and 600B needs to be a predetermined distance t2 and the filler 80 needs to be filled. Further, it is necessary to cover the outside of the reinforcing bar members 600A and 600B with the filler 80 so as to have a predetermined distance t1. Therefore, in the reinforced concrete structure 501 using the conventional reinforced concrete member 600, the convex portion 85 is formed on the surface. That is, in the reinforced concrete structure 501 using the conventional reinforced concrete member 600, as shown in FIG. 5, the convex portion 85 is formed on a part of the surface, so that the surface cannot be flattened. Further, in order to flatten the surface of the reinforced concrete structure 501, it is necessary to thicken the filler 80 in the portion other than the convex portion 85, so that more filler 80 is required than usual, and the size of the reinforced concrete structure 501 is also large. This will increase the weight of the reinforced concrete structure 501 itself.

From the above, in the reinforcing bar member 100 according to the first embodiment, the engaging portion 50 is engaged even when the main reinforcing bar portion 10 and the force distribution reinforcing bar portion 20 are located on the same plane and a plurality of reinforcing bar members 100 are arranged side by side. By combining them, they can be connected in the same plane. As a result, the reinforced concrete structure 500 using the reinforced concrete member 100 can have a smaller size and a flat surface as compared with the case where the conventional reinforced concrete member 600 shown in FIG. 5 is used. Can be finished to. Further, in the reinforced concrete structure 500 using the reinforcing bar member 100, the amount of the filler 80 used can be reduced, and the strength can be ensured to be equal to or higher than the case where the conventional reinforcing bar member 600 is used.

Further, the reinforcing bar member 100 has a plate thickness of about 4.5 mm to 16.0 mm, and ordinary rope, high-strength steel, stainless steel, alloy steel, electromagnetic steel plate and the like can be adopted. Further, as the surface shape thereof, a flat plate steel plate, a ribbed steel plate, a striped steel plate or the like can be adopted. By adopting a ribbed steel plate having protrusions on the surface or a striped steel plate, the degree of adhesion between the reinforcing bar member 100 and the filler 80 such as mortar can be improved. The number of the main reinforcing bar portion 10 and the force distribution reinforcing bar portion 20 of the reinforcing bar member 100 is not limited to those shown in FIGS. 1 to 3, and can be appropriately set. Further, the reinforcing bar member 100 projects the engaging portion 50 in the direction in which the force distribution reinforcing bar portion 20, which is normally difficult to apply a large force, extends and is engaged with the adjacent reinforcing bar member 100, but the main reinforcing bar portion 10 extends in the direction of extending. It may be projected to.

Further, in the first embodiment, the reinforcing bar member 100 has a structure in which the main bar portion 10 and the force distribution bar portion 20 are orthogonal to each other, but the extending direction of the force distribution bar portion 20 is predetermined with respect to the main bar portion 10. You may have the angle of. For example, the reinforcing bar member 100 may be formed in a grid pattern by forming a plurality of slits in one steel plate and expanding the slits.

Further, in the first embodiment, as a reinforcing structural member for arranging reinforcement in the existing concrete structure and the reinforced concrete structure, the reinforcing bar member 100 is arranged on the surface of the existing reinforced concrete structure 510 and the filler 80 is sprayed. This has been described in the form of being embedded in the reinforced concrete structure 500. However, the reinforcing bar member 100 may be applied as a structural member to the newly installed reinforced concrete structure 500. Even when applied to a newly installed reinforced concrete structure, as shown in FIG. 4, since the connecting portions of the plurality of reinforcing bar members 100 are engaged by the engaging portion 50, the cover thickness of the filler 80 is increased. It can be finished to the same thickness as the part other than the connection part.

Embodiment 2.
Next, the reinforcing bar member 200 according to the second embodiment will be described. The reinforcing bar member 200 according to the second embodiment is a modification of the shape of the engaging portion 50 of the reinforcing bar member 100 according to the first embodiment. In the second embodiment, the changes to the first embodiment will be mainly described. Regarding each part of the reinforcing bar member 200 according to the second embodiment, those having the same function in each drawing shall be indicated with the same reference numerals as those used in the description of the first embodiment.

FIG. 6 is a plan view of the reinforcing bar member 200 according to the second embodiment. FIG. 7 is an enlarged view of a portion D in FIG. FIG. 6 shows the periphery of the end faces 11 of the lattice-shaped reinforcing bar members 200A and 200B.

In the reinforcing bar member 200A, the engaging portion 250A protrudes from the end surface 11A. Further, the reinforcing bar member 200B has the same configuration. The reinforcing bar member 200A and the reinforcing bar member 200B are arranged side by side next to each other on the surface of the existing reinforced concrete structure 510 in the same manner as the reinforcing bar members 100A and 100B shown in FIG. 3, for example, and the engaging portion 250A and the engaging portion 250B. Is engaged and connected. Hereinafter, the engaging portion 250A and the engaging portion 250B are collectively referred to as an engaging portion 250. In FIG. 6, the left-right direction is the direction in which the main bar portion 10 extends, and the vertical direction is the direction in which the force distribution bar portion 20 extends. Also in the second embodiment, the engaging portion 250 will be described in a form in which the force distribution bar portion 20 protrudes in the extending direction, but the engaging portion 250 may also protrude from the end face 21 in the extending direction of the main bar portion 10.

As shown in FIG. 7, the engaging portion 250A projects from the end surface 11A in the direction in which the force distribution muscle portion 20A extends. The engaging claws 251Aa, 251Ab, and 251Ac project in one direction intersecting with the direction in which the engaging portion 250A protrudes. That is, in FIG. 6, the engaging claws 251Aa, 251Ab, and 251Ac project in the direction in which the main bar portion 10 extends. This has the same configuration in the engaging portion 250B of the reinforcing bar member 200B. The engaging portion 250A of the reinforcing bar member 200A has a shape in which the engaging portion 250B of the reinforcing bar member 200B and the engaging claws 251 are fitted to each other. The engaging portion 250A engages the engaging claw 251Bd between the engaging claw 251Aa and the engaging claw 251Ab, the engaging claw 251Bc between the engaging claw 251Ab and the engaging claw 251Ac, and the engaging claw 251Ac. The engaging claw 251Bb is engaged with the joint claw 251Ad. Further, the engaging portion 250B has an engaging claw 251Ad between the engaging claw 251Ba and the engaging claw 251Bb, an engaging claw 251Ac between the engaging claw 251Bb and the engaging claw 251Bc, and an engaging claw 251Bc. The engaging claw 251Ab is engaged with the engaging claw 251Bd. Hereinafter, the engaging claws 251Aa, 251Ab, 251Ac, and 251Ad of the engaging portion 250A are collectively referred to as an engaging claw 251A. Similarly, the engaging claws 251Ba, 251Bb, 251Bc, and 250Bd of the engaging portion 250B are collectively referred to as an engaging claw 251B. In the engaging portion 250A and the engaging portion 250B, one engaging claw 251B is fitted between the two engaging claws 251A, and one engaging claw 251A is fitted between the two engaging claws 251B. You will be engaged.

The engaging claws 251A are provided at four locations on the engaging portion 250A. The engaging claws 251Aa, 251Ab, 251Ac, and 251Ad of the engaging portion 250A are arranged at equal intervals in the direction in which the force distribution muscle portion 20 extends. The engaging claws 251Aa, 251Ab, 251Ac, and 251Ad are arranged at equal intervals in the direction in which the main bar portion 10 extends. This has the same configuration as the reinforcing bar member 200A in the reinforcing bar member 200B. The engaging surface 252Ad of the engaging claw 251Ac and the engaging surface 252Bd of the engaging claw 251Bc engaged at the central portions of the engaging portion 250A and the engaging portion 250B are the center lines of the force distribution muscle portion 20. It is located above 25. That is, when the coordinates of the positions where the engaging claws 251A and the engaging claws 251B are engaged are averaged, they are located on the extension line of the center line 25 of the force distribution muscle portion 20. In other words, the center of the plurality of engaging surfaces 252 included in the engaging portion 250 is on the extension line of the center line 25 of the force distribution muscle portion 20. With this configuration, when a force is applied to separate the engaging portion 250A and the engaging portion 250B in the direction in which the force distribution muscle portion 20 extends, the engaging portion 250A moves in the direction of the arrow 55A in FIG. , It is possible to prevent the engaging portion 250B from falling in the direction of the arrow 55B in FIG. When a force is applied to the engaging portion 250A and the engaging portion 250B in the direction in which the force distribution muscle portion 20 extends, the engaging claw 251A of the engaging portion 250A and the engaging claw 251B of the engaging portion 250B are engaged with each other. It tries to move away in the direction of disengagement, that is, in the direction in which the main bar 10 extends. However, in the engaging portion 250A, the force applied to each of the engaging claws 251Aa, 251Ab, 251Ac, and 251Ad can be received by the force distribution bar portion 20, so that the main bar portion 10 forming the end face 11A of the reinforcing bar member 200A is formed. Is not bent, and it is possible to suppress deformation such that the engaging portion 250A tilts in the direction of the arrow 55A. It is desirable that the center of the plurality of engaging surfaces 252 is located on the center line 25 of the force distribution bar portion 20, but it is also possible to configure the center line 25 by removing it from the center line 25. For example, at least one of the plurality of engaging surfaces 252 may be configured to be located on the center line 25 of the force distribution bar portion 20.

The engaging claws 251A each have an engaging surface 252A, and the engaging surfaces 252Aa, 252Ac, 252Ae, and 252Ag formed on the end surface side of the reinforcing bar member 200A, which is a lattice-shaped plate, and the engagement surface formed on the opposite end surface side. It is provided with a mating surface 252Ab, 252Ad, and 252Af. The reinforcing bar member 200B has the same configuration as the reinforcing bar member 200A. Hereinafter, the engaging surfaces 252Aa, 252Ab, 252Ac, 252Ad, 252Ae, 252Af, and 252Ag of the engaging portion 250A are collectively referred to as an engaging surface 252A. The engaging surfaces 252Ba, 252Bb, 252Bc, 252Bd, 252Be, 252Bf, and 252Bg of the engaging portion 250B are collectively referred to as an engaging surface 252B. Further, the engaging surface 252A and the engaging surface 252B are collectively referred to as an engaging surface 252. The engaging surface 252 is inclined by a predetermined angle with respect to the extending direction of the end surface 11 of the reinforcing bar member 200. The engaging surface 252 of the engaging surface 252 facing the end surface 11 of the reinforcing bar member 200 is inclined so as to approach the end surface 11 of the reinforcing bar member 200 toward the tip of the engaging claw 251. The engaging surface 252 on the side of the engaging surface 252 that does not face the end surface 11 of the reinforcing bar member 200, that is, the engaging surface 252 facing outward, is the end surface 11 of the reinforcing bar member 200 as it goes toward the tip of the engaging claw 251. It is tilted away from. With this configuration, each engaging claw 251 is sandwiched and fitted from both sides of the engaging surface 252 on the side facing the end surface 11 and the engaging surface 252 facing outward. When the engaging portion 250A of the reinforcing bar member 200A and the engaging portion 250B of the reinforcing bar member 200B try to move in a direction away from each other, the engaging surfaces 252 come into contact with each other and do not come off. Therefore, when a force is applied to separate the engaging portion 250A and the engaging portion 250B in the direction of the force distribution bar portion 20, the engaging surface 252A of the engaging portion 250A and the engaging surface 252B of the engaging portion 250B come into contact with each other. However, since the engaging claws 251A and the engaging claws 251B are caught in the direction in which they are separated from each other, the engagement is not easily disengaged. The engaging surface 252 on the side facing the end surface 11 corresponds to the "inner engaging surface" of the present invention, and the engaging surface 252 facing outward corresponds to the "outer engaging surface" of the present invention. Equivalent to.

Further, the engaging portion 250 according to the second embodiment is configured so that the width increases from the tip of the engaging portion 250 toward the end surface 11 of the reinforcing bar member 200. With this configuration, the strength and rigidity of the engaging portion 250 are increased, and even if a load is applied in the direction of disengaging the engaging portion 250, the engaging portion 250 is not easily disengaged.

The reinforcing bar member 200 according to the second embodiment is also applied to the reinforced concrete structure 500 like the reinforcing bar member 100 according to the first embodiment. By providing the engaging portion 250, the reinforcing bar member 200 can arrange a plurality of reinforcing bar members 200 side by side and can be connected to each other. Therefore, unlike the conventional reinforcing bar member 101, it is not necessary to arrange them in an overlapping manner, so that the reinforced concrete structure 500 does not need to project the surface of the connected portion of the reinforcing bar member 200, and does not need to thicken the filler 80. Therefore, the reinforced concrete structure 500 can reduce the weight without increasing the size.

Embodiment 3.
Next, the reinforcing bar member 300 according to the third embodiment will be described. The reinforcing bar member 300 according to the third embodiment is an end portion in the direction in which the main reinforcing bar portion 310 extends, and can be arranged without overlapping with the adjacent reinforcing bar member 300 in the thickness direction. The reinforcing bar member 300 of the third embodiment is composed of a grid-like plate like the reinforcing bar member 100 according to the first embodiment and the reinforcing bar member 200 according to the second embodiment.

FIG. 8 is a plan view of the reinforcing bar member 300 according to the third embodiment. In FIG. 8, the two reinforcing bar members 300A and the reinforcing bar member 300B are arranged adjacent to each other in the direction in which the main reinforcing bar portion 310 extends. The end of the main bar 310A of the reinforcing bar member 300A and the end of the main bar 310B of the reinforcing bar member 300B are located in the same region, but if they overlap in the thickness direction of the reinforcing bar member 300 which is a grid-like plate. Is placed without. The reinforcing bar member 300A and the reinforcing bar member 300B are arranged on the surface of the existing reinforced concrete structure 510 in the same manner as the reinforcing bar member 100A and the reinforcing bar member 100B shown in FIG. 3, for example. Further, it may be applied not only to the reinforcement of the floor slab as shown in FIG. 3 but also to the beams and columns of the existing reinforced concrete structure 510.

As shown in FIG. 8, at the end portion of the reinforcing bar member 300A, a plurality of the force distribution bar portions 320A among the grid-like main bar portion 310A and the force distribution bar portion 320A are partially removed. It has an arm portion 330A configured as such. That is, in the reinforcing bar member 300A which is a lattice-shaped plate, the main reinforcing bar portion 310A includes an arm portion 330A extending in the direction of the adjacent main reinforcing bar portions 310A. The tip portion 331A of the arm portion 330A is arranged at a predetermined distance from the adjacent main muscle portion 310A. The distance between the tip portion 331A of the arm portion 330A and the adjacent main muscle portion 310A is set to be larger than the width of the main muscle portion 310A. The reinforcing bar member 300B also has the same structure as the reinforcing bar member 300A. With this configuration, the main reinforcing bar portion 310B of the other reinforcing bar member 300B is provided in the gap 332A between the tip portion 331A of the arm portion 330A and the adjacent main reinforcing bar portion 310A at the end of one reinforcing bar member 300A. Can be placed. Further, the other reinforcing bar member 300B has the same configuration, and the main reinforcing bar portion 310A of one reinforcing bar member 300A is arranged in the gap 332B between the tip portion 331B of the arm portion 330B and the adjacent main reinforcing bar portion 310B. be able to.

FIG. 9 is a plan view showing an arrangement example of the reinforcing bar member 300 according to the third embodiment. The reinforcing bar member 300 has a structure in which the end portion in the main bar direction has the arm portions 330A and 330B as shown in FIG. 8, but the end portion in the force distribution bar direction is the engagement according to the first embodiment. A unit 50 may be provided. With this configuration, the force distribution bars of the plurality of reinforcing bar members 300 are firmly connected by the engaging portions 50, and the main bar portions 310A and 310B are thickened in the main bar direction as shown in FIG. It can be arranged without overlapping in the vertical direction. Since a plurality of reinforcing bar members 300 can be arranged side by side in the main reinforcing bar direction while being connected in both directions in the force distribution bar direction, it can be installed in a long and wide area such as an inner wall of a tunnel.

Further, since the reinforcing bar members 300 do not need to be arranged so as to overlap each other in the thickness direction, it is necessary to project the surface of the reinforced concrete structure 500 as in the reinforcing bar member 100 of the first embodiment and the reinforcing bar member 200 of the second embodiment. There is no need to thicken the filler 80. Further, since the main reinforcing bars 310 of the adjacent reinforcing bar members 300 are overlapped in the same region, the strength of the reinforced concrete structure 500 can be ensured as in the case of being configured by a single reinforcing bar member. The configuration of the reinforcing bar member 300 according to the third embodiment is used when the reinforcing bar member 300 is arranged according to the size of a portion requiring reinforcement, particularly when applied to an existing reinforced concrete structure as a structural member for reinforcement. It is a thing. The reinforcing bar member 300 may be manufactured in the shape shown in FIG. 8 from the beginning, but initially the reinforcing bar member 300 is manufactured as a grid-like plate, and the force distribution bar portion 320 having a grid-like shape according to the portion to be reinforced at the site is provided. It may be processed to provide a gap 332.

Embodiment 4.
Next, the reinforcing bar member 400 according to the fourth embodiment will be described. The reinforcing bar member 400 according to the fourth embodiment includes the engaging portion 50 described in the first embodiment. The engaging portion 50 is provided at an end portion in the direction in which the main reinforcing bar portion 410 of the reinforcing bar member 400 extends and an end portion in the direction in which the force distribution bar portion 420 extends. The reinforcing bar member 400 according to the fourth embodiment can be arranged so as to be engaged with another reinforcing bar member 400 at each of the end portion in the direction in which the main reinforcing bar portion 410 extends and the end portion in the direction in which the force distribution reinforcing bar portion 420 extends. It is composed.

FIG. 10 is a plan view showing an arrangement example of the reinforcing bar member 400 according to the fourth embodiment. FIG. 11 is an enlarged view of part E of FIG. FIG. 12 is a cross-sectional view showing an arrangement example of the reinforcing bar member 400 according to the fourth embodiment. FIG. 13 is an enlarged view of the F portion of FIG. 10 to 13 are views when applied to the top plate 582 of the manhole 580 as an example of the reinforced concrete structure in which the reinforcing bar member 400 is installed. In the manhole 580, the opening neck portion 583 is connected to the top plate 582 of the reinforced concrete box body 581, which is a rectangular skeleton portion. The opening neck 583 is, for example, a cylinder having an opening 584 communicating with the box 581. A lid (not shown) is arranged at the opening 584, and the opening 584 is closed.

The box 581 is buried in the ground. Then, for example, soil is covered on the top plate 582, and a load such as a vehicle passing through the ground surface is applied. Further, the opening neck portion 583 receives earth pressure from the soil surrounding the cylindrical portion, and further receives a load of a vehicle or the like passing through the ground surface. Therefore, when a load is applied from the opening neck portion 583, tensile stress acts around the inner opening portion 585 on the lower surface of the top plate 582. Concrete is strong against compressive force and weak against tensile force. Therefore, after many years of use, deterioration such as cracks occurs on the lower surface of the top plate 582, centering on the periphery of the opening. Therefore, as shown in FIGS. 12 and 13, the reinforcing bar member 400 is installed on the lower surface of the top plate 582 and covered with the filler 80 to reinforce the lower surface of the top plate 582. Although the reinforcing bar member 400 is used to reinforce the reinforced concrete structure in which the existing reinforcing bar 900 is installed as shown in FIG. 13, it may be embedded in the newly installed reinforced concrete structure and installed.

As shown in FIG. 10, in the top plate 582 of the manhole 580, a reinforcing bar member 400 is arranged so as to surround the inner opening 585. Since it is difficult to integrally manufacture the reinforcing bar member 400 into a large shape for the convenience of manufacturing and transportation, in order to arrange the reinforcing bar member 400 so as to surround the inner opening 585 as shown in FIG. 10, a plurality of reinforcing bar members 400 are provided. It is engaged and arranged integrally at the engaging portion 50. In the plurality of reinforcing bar members 400, the engaging portion 50 is arranged at the end portion in the direction in which the main reinforcing bar portion 410 extends and the end portion in the direction in which the force distribution bar portion 420 extends. Therefore, the reinforcing bar members 400 can be connected to each other in both the main bar direction and the force distribution bar direction. Therefore, even when it is desired to arrange the reinforcing bar member 400 surrounding the inner opening 585 as shown in FIG. 10, a plurality of reinforcing bar members 400 can be freely combined and arranged. As shown in FIG. 10, the end portion of the reinforcing bar member 400 can be appropriately cut and arranged according to the shape of the inner opening portion 585 where the reinforcing bar member 400 does not need to be arranged. Even when applied to a structure other than the manhole 580, the reinforcing bar member 400 can be installed by freely changing its shape.

As shown in FIG. 11, according to the reinforcing bar member 400 according to the fourth embodiment, the engaging portions 50 are engaged with each other in both the main bar direction and the force distribution bar direction to connect the plurality of reinforcing bar members 400. Therefore, the reinforced concrete structure can be reinforced against tensile stress applied in both the main bar direction and the force distribution bar direction. Since the thickness of the engaging portion 50 is the same as that of the other main reinforcing bars 410 and the force distribution reinforcing bar portion 420, the cover thickness of the engaging portion 50 even if it is embedded in a concrete structure such as a top plate 582. It is not necessary to increase the thickness, and the reinforcing bar member 400 can be arranged without projecting the surface of the top plate 582 as shown in FIGS. 12 and 13. The engaging portion 50 provided on the reinforcing bar member 400 may be the engaging portion 250 of the second embodiment. It is desirable that the center of the plurality of engaging surfaces 52 of the respective engaging portions 50 and 250 is located on the center line 25 of the force distribution bar portion 20 or the main bar portion 10, but it can also be configured to be disengaged. Is. For example, at least one of the plurality of engaging surfaces 52 may be located on the center line 25. Further, in the fourth embodiment, the example in which the reinforcing bar member 400 is applied to the reinforcing structure of the top plate 582 of the manhole 580 has been described, but it can also be applied to other concrete structures.

10 main bar, 11 end face, 11A end face, 20 distribution bar, 21 end face, 25 center line, 50 engagement part, 50A engagement part, 50B engagement part, 51 engagement claw, 51A engagement claw, 51Aa engagement Go claw, 51Ab engaging claw, 51Ac engaging claw, 51B engaging claw, 51Ba engaging claw, 51Bb engaging claw, 51Bc engaging claw, 52 engaging surface, 52A engaging surface, 52Aa engaging surface, 52Ab engaging Joint surface, 52Ac engagement surface, 52B engagement surface, 52Ba engagement surface, 52Bb engagement surface, 52Bc engagement surface, 55A arrow, 55B arrow, 80 filler, 85 convex part, 100 reinforcement member, 100A reinforcement member, 100B reinforcing bar member, 101 reinforcing bar member, 200 reinforcing bar member, 200A reinforcing bar member, 200B reinforcing bar member, 250 engaging part, 250A engaging part, 250B engaging part, 250Bd engaging claw, 251 engaging claw, 251A engaging claw, 251Aa engaging claws, 251Ab engaging claws, 251Ac engaging claws, 251Ad engaging claws, 251B engaging claws, 251Ba engaging claws, 251Bb engaging claws, 251Bc engaging claws, 251Bd engaging claws, 252 engaging surfaces, 252A Engagement Surface, 252Aa Engagement Surface, 252Ab Engagement Surface, 252Ac Engagement Surface, 252Ad Engagement Surface, 252Ae Engagement Surface, 252Af Engagement Surface, 252Ag Engagement Surface, 252B Engagement Surface, 252Ba Engagement Surface, 252Bb engaging surface, 252Bc engaging surface, 252Bd engaging surface, 252Be engaging surface, 252Bf engaging surface, 252Bg engaging surface, 300 reinforcing bar member, 300A reinforcing bar member, 300B reinforcing bar member, 310 main bar section, 310A main bar section, 310B main bar, 320 distribution bar, 320A main bar, 320B main bar, 330 arm, 330A arm, 330B arm, 331 tip, 331A tip, 331B tip, 332A gap, 332B gap, 400 reinforcement Members, 410 main bar, 420 force distribution bar, 500 reinforced concrete structure, 501 reinforced concrete structure, 510 reinforced concrete structure, 550 floor slab, 560 pillars, 570 beams, 580 manholes, 581 box body, 582 top slab, 583 opening neck, 584 opening, 585 Inner opening, 600 rebar member, 600A rebar member, 600B rebar member, 900 existing rebar, t1 distance, t2 distance.

Claims (16)

With multiple main bars arranged parallel to each other,
A reinforcing bar member formed of a grid-like plate having a plurality of force distribution bar portions connecting between a plurality of adjacent main bar portions.
With an engaging portion protruding from the end face of the grid-like plate,
The engaging portion is
A reinforcing bar member comprising an engaging claw that protrudes in one direction that is along the surface of the lattice-shaped plate and intersects with the direction in which the engaging portion protrudes. The engaging claw
The reinforcing bar member according to claim 1, further comprising an inner engaging surface formed on the end surface side of the lattice-shaped plate. The inner engaging surface is
It is inclined with respect to the end face of the grid-like plate and
The reinforcing bar member according to claim 2, which approaches the end surface of the lattice-shaped plate as it goes to the tip of the engaging claw. With multiple main bars arranged parallel to each other,
A reinforcing bar member formed of a grid-like plate having a plurality of force distribution bar portions connecting between a plurality of adjacent main bar portions.
A engaging portion that protrudes from the end face of the grid-like plate is provided.
The engaging portion is
It is provided with an engaging claw that protrudes in one direction that intersects with the direction in which the engaging portion protrudes.
The engaging claw
It has an inner engaging surface formed on the end face side of the grid-like plate, and has an inner engaging surface.
The inner engaging surface is
It is inclined with respect to the end face of the grid-like plate and
A reinforcing bar member that approaches the end face of the grid-like plate as it goes to the tip of the engaging claw. The engaging portion is
Equipped with a plurality of the engaging claws
The inner engaging surface is
The reinforcing bar member according to any one of claims 2 to 4, which is located on the center line of the force distribution bar portion or on the center line of the main bar portion. The engaging claw
The reinforcing bar member according to any one of claims 1 to 5 , further comprising an outer engaging surface formed on the opposite end surface side of the lattice-shaped plate. The outer engaging surface is
It is inclined with respect to the end face of the grid-like plate and
The reinforcing bar member according to claim 6 , which is inclined so as to move away from the end surface of the lattice-shaped plate toward the tip of the engaging claw. With multiple main bars arranged parallel to each other,
A reinforcing bar member formed of a grid-like plate having a plurality of force distribution bar portions connecting between a plurality of adjacent main bar portions.
A engaging portion that protrudes from the end face of the grid-like plate is provided.
The engaging portion is
It is provided with an engaging claw that protrudes in one direction that intersects with the direction in which the engaging portion protrudes.
The engaging claw
The outer engaging surface formed on the opposite end surface side of the grid-like plate is provided.
The outer engaging surface is
It is inclined with respect to the end face of the grid-like plate and
A reinforcing bar member that is inclined so as to move away from the end face of the grid-like plate toward the tip of the engaging claw. The engaging portion is
Equipped with a plurality of the engaging claws
The outer engaging surface provided on the engaging claw is
The reinforcing bar member according to any one of claims 6 to 8, which is located on the center line of the force distribution bar portion or on the center line of the main bar portion. The engaging portion is
The reinforcing bar member according to any one of claims 1 to 9 , which protrudes in a direction intersecting the main reinforcing bar portion. The engaging portion is
The reinforcing bar member according to any one of claims 1 to 10 , wherein the main reinforcing bar portion projects to an end portion in the extending direction. The main muscle is
At the end of the grid-like plate, an arm portion extending toward the adjacent main muscle portion is provided.
The tip of the arm is
The reinforcing bar member according to claim 11 , wherein the reinforcing bar member is arranged with a gap larger than the width of the main reinforcing bar portion adjacent to the main reinforcing bar portion. With multiple main bars arranged parallel to each other,
A reinforcing bar member formed of a grid-like plate having a plurality of force distribution bar portions connecting between a plurality of adjacent main bar portions.
The main muscle is
At the end of the grid-like plate, an arm portion extending toward the adjacent main muscle portion is provided.
The tip of the arm is
A reinforcing bar member arranged with a gap larger than the width of the main reinforcing bar portion between the adjacent main reinforcing bar portions. The reinforcing bar member according to any one of claims 1 to 13 is
Reinforced concrete structure in which reinforcement is arranged in concrete as a structural member. The reinforcing bar member according to any one of claims 1 to 13 is
Reinforced concrete structure in which reinforcement is arranged in additional concrete for the existing concrete structure as a structural member for reinforcement. The reinforcing bar member is
The reinforced concrete structure according to claim 14 or 15 , wherein the main bar portion and the force distribution bar portion are arranged so as to be located on the same surface.

Images