JP5652959B2 - Reinforcement structure of unit rebar - Google Patents

Description

  The present invention relates to a reinforcing structure for unit reinforcing bars used for the construction of reinforced concrete.

  In recent years, it has been required to increase the strength of reinforced concrete used in structures such as pillars and beams of buildings from the viewpoint of improving the durability of buildings, improving earthquake resistance, and protecting the environment such as building waste materials. Yes. Here, since the concrete itself is weak against tensile stress, a strong structural body is formed by arranging a reinforcing bar resistant to tensile stress inside the concrete to form reinforced concrete.

  Also, when placing reinforcing bars (placement), the workers are assembling the reinforcing bars at the construction site of the reinforced concrete, but in recent years there is a problem of the space to arrange the reinforcing bars at the construction site due to the density of the building. There is a problem with the workability of bar arrangement work affected by the weather. For this reason, there is a need for a construction method in which unit rebars that have been unitized in advance at factories and the like are carried into the reinforced concrete construction site, and a precast concrete method (PC method) in which reinforced concrete that has been constructed in advance in the factory is brought into the construction site. ing.

  Here, conventionally, it is well known to narrow the interval (pitch) of hoop bars (sturps) arranged in concrete in order to increase the strength of reinforced concrete, and to ensure a large cover thickness of concrete. ing.

  On the other hand, there is also known a reinforcing bar that bundles multiple hoops to increase the strength of reinforced concrete (for example, see Patent Document 1).

Japanese Examined Patent Publication No. 6-076712

  FIG. 11 is a perspective view showing a state of a defect in a conventional reinforcing bar rod. Conventional unit rebars have been connected to each other by using the binding wire 4 schematically shown here at the contact portion between the rebars, but the unit rebar 1 that is unitized by combining rebars in advance at a factory or the like. When transporting to a construction site with a transport machine or the like, or when placing the unit rebar 1 at the construction site, the spacing between the hoop bars may become non-uniform as shown by the dimensions P1 to P5 in FIG. As shown in FIG. 11 (b), there is a possibility that the relative displacement between the main muscles may occur. And with such non-uniform spacing between the hoop bars, the shear force of the reinforced concrete is reduced, or as shown in the dimension A in FIG. Along with this, the strength of the reinforced concrete is reduced due to insufficient cover thickness of the concrete 20.

  Even when concrete is placed with the reinforcing bars arranged as designed in the concrete, the relative displacement between the reinforcing bars occurs due to the fluid force of the concrete with physical properties that are not excellent in fluidity. There is also a problem that the relative positional relationship between each other cannot be maintained as designed. Due to such problems, the strength of reinforced concrete is reduced. In addition, once concrete is placed, since the state of the reinforcing bars arranged in the concrete having opaque physical properties cannot be visually recognized, there is a problem that it is not possible to confirm whether the reinforcing bars are arranged as designed. Due to such a problem, when the reinforced concrete does not have the strength as calculated in the structure, the strength is reduced.

  Therefore, it is known to prevent relative displacement between the reinforcing bars by welding the contact portions of the reinforcing bars instead of using the binding wires. Here, the reinforcing bars arranged in the reinforced concrete act on the tensile force. And the allowable stress of the reinforcing bar with respect to the tensile force is calculated as a numerical value in the structural calculation according to the thickness and number of reinforcing bars. For this reason, it is well known that it is important to keep the cross-sectional shape of the reinforcing bar uniform and to maintain the quality of the reinforcing bar. Moreover, if welding is used for the reinforcing bar itself, the reinforcing bar will be damaged as a result, and the cross-sectional shape of the reinforcing bar will become non-uniform. You can't keep it on the street. As a result, the strength of the welded portion of the reinforcing bar decreases. Furthermore, when there are a large number of welded portions of reinforcing bars, the strength is greatly reduced, and the strength in structural calculation cannot be maintained. Therefore, it is also known that it is not preferable to use welding for reinforcing bars.

  Although various welding methods have been established, damage to the reinforcing bars caused by welding is inevitable by any excellent welding method. For this reason, it is difficult to think that quality and strength can be maintained as 100% structural calculation after all.

  In addition, when the welding method is applied to the assembly of the unit reinforcing bars, a troublesome work is required in which an operator welds the contact portions of a large number of reinforcing bars one by one. Moreover, since the worker who performs welding requires skill, welding by an unskilled worker may cause variations in the quality of the reinforced concrete and cause a decrease in strength of the reinforced concrete. Even when a skilled worker welds a reinforcing bar, the reinforced concrete is used as a structure. Therefore, due to an unexpected external factor such as an earthquake, stress is concentrated in the welded part, causing the welded part to break. This may lead to a decrease in strength of reinforced concrete.

  On the other hand, it is known that the strength of reinforced concrete can be increased by narrowing the arrangement interval of the hoop bars or sufficiently ensuring the cover thickness of the concrete. However, if the hoop is not arranged at an appropriate position as designed, the strength of the reinforced concrete cannot be increased. That is, it is necessary to prevent the relative displacement between the reinforcing bars due to the positional displacement between the reinforcing bars due to the unit reinforcement and the fluid force of the concrete having physical properties that are not excellent in fluidity during placement. As a result, the above-mentioned undesirable welding is used. Moreover, when the arrangement interval of the hoop bars is narrowed, the hoop bars themselves become obstacles to the flow of concrete during placement, and there is a risk of causing a problem that the concrete does not reach every corner.

  Moreover, in order to ensure sufficient cover thickness in reinforced concrete, more concrete is required, and extra material costs are required. In addition, because the size of the columns and beams themselves as a reinforced concrete structure increases, the space in the building cannot be effectively used. Moreover, it is not preferable also from the viewpoint of the necessity of weight reduction of the building itself accompanying the increase in the height of the building.

  On the other hand, the reinforcing bar disclosed in Patent Document 1 can increase the strength of reinforced concrete by bundling hoops in layers. However, the strength of the reinforced concrete cannot be increased unless the hoop bars are arranged at appropriate positions as designed. That is, it is necessary to prevent the relative displacement between the reinforcing bars due to the positional displacement between the reinforcing bars due to the unit reinforcement and the fluid force of the concrete having physical properties that are not excellent in fluidity during placement. As a result, the above-mentioned undesirable welding is used. In addition, a large amount of equipment and processing costs are required for processing into a special shape with multiple reinforcing bars.

  From the above, it is possible to prevent the relative positional relationship between the main bar and the hoop bar and prevent the above-mentioned problems at the same time without requiring welding. Was requested.

  The objective of this invention is providing the reinforcement structure of the unit reinforcement which can prevent the relative position shift of reinforcements without welding, and raises the intensity | strength of a reinforced concrete.

In order to solve the above-described problem, a unit reinforcing bar according to claim 1 of the present invention is
In the reinforcing structure of unit rebar used for reinforced concrete,
At least three main bars extending at a predetermined interval from each other in the extending direction of the unit reinforcing bars, and the main bars are bent so as to be in contact with each other in a state of being orthogonal to the main bars. A unit reinforcing bar for reinforced concrete, comprising at least two hoop bars arranged at equal intervals in the direction of orientation, and a binding wire that is bound to hold the relative position of each other at a contact portion between the main bar and the hoop bar ,
A reinforcing bar for reinforcing the unit reinforcing bar, and a reinforcing structure for the unit reinforcing bar comprising:
The reinforcing bars are formed by bending one reinforcing bar, and two extending portions extending correspondingly along two different main bars among the at least three main bars , a connecting portion for connecting the ends of the hand of the extending portion, and the other end portion of the extending portion bent portion bent in L-shape is formed,
Reinforcement for reinforcing the unit rebar, the extending portion is in contact in a state of being perpendicular to the hoop adjacent the at least two each, wherein the hoop is the tie wire and the extending portion in the contact portion in bunched Rutotomoni it is characterized in that the hoop and the bent portion is also tied by the binding wire.

  According to the reinforcing structure of a unit reinforcing bar according to claim 1 of the present invention, the relative positional relationship between the main bar and the hoop bar can be maintained as specified even under the influence of an external force or the like due to an unexpected external factor.

  Therefore, there is no relative displacement between the reinforcing bars when transporting the unit rebars or when placing the unit rebars at the construction site, and without causing extra work such as reassembling the reinforcing bars at the construction site of the reinforced concrete. That's it. Moreover, the cover thickness as designed can be secured. In addition, the relative position between the reinforcing bars is not caused by the fluid force of the concrete having poor physical properties at the time of placing. As a result, the strength of the reinforced concrete itself is not reduced.

  Moreover, since the reinforcing bars are bound together using a binding wire, it is not necessary to weld them. Therefore, there is no possibility that the strength of the reinforcing bars will be reduced due to the non-uniformity of the reinforcing bars or the quality deterioration. Moreover, the troublesome welding work which an operator welds the contact part of many rebars for every place does not generate | occur | produce. In addition, there is no quality variation due to welding by unskilled workers. That is, 100% or more of strength and quality can be maintained with respect to the numerical values related to quality and strength listed in the structural calculation. Further, when reinforced concrete is used as a structure, it is possible to avoid stress concentration at the binding portion of the reinforcing bars due to unexpected external factors such as earthquakes, and to prevent a decrease in strength of the reinforced concrete.

  In addition, the hoop bars are kept at the specified intervals, and even if they are affected by external forces due to unexpected external factors, the intervals are not reduced. It does not become a big obstacle. As a result, the concrete does not reach every corner, and the occurrence of undesirable nests in the concrete can be prevented. In addition, the material cover can be reduced because the concrete cover thickness is not required. Moreover, since the size of the reinforced concrete structure itself does not increase, the space in the structure can be effectively used.

  Further, it is not necessary to process the steel bars in a special shape as a hoop bar by overlapping the reinforcing bars as shown in Patent Document 1, and the cost can be reduced because the existing hoop bar which is a general-purpose product can be used.

In addition , since at least two adjacent hoops (straps) and reinforcing bars are bound together by a tie wire, even if they are affected by external forces due to unexpected external factors during transportation or construction, they have conventionally occurred. The arrangement interval of the hoop bars that have been used can be prevented from becoming uneven, and the arrangement state of the main bars and the hoop bars constituting the unit reinforcing bars is correctly maintained.

  Therefore, there is no relative displacement between the hoop bars when transporting the unit rebars or when placing the unit rebars at the construction site, and there is no extra work such as reassembling the rebars at the construction site of the reinforced concrete. It will end. Further, the relative position displacement between the hoop bars is not caused by the flow force of the concrete having poor physical properties at the time of placing, and the strength of the reinforced concrete itself is not reduced.

  Moreover, since the reinforcing bars are bound together using a binding wire, it is not necessary to weld them. Therefore, there is no possibility that the strength of the reinforcing bars will be reduced due to the non-uniformity of the reinforcing bars or the quality deterioration. Moreover, the troublesome welding work which an operator welds the contact part of many rebars for every place does not generate | occur | produce. Further, there is no quality variation caused by welding by unskilled workers. That is, 100% or more of strength and quality can be maintained with respect to the numerical values related to quality and strength listed in the structural calculation. Further, when reinforced concrete is used as a structure, it is possible to avoid stress concentration at the binding portion of the reinforcing bars due to unexpected external factors such as earthquakes, and to prevent a decrease in strength of the reinforced concrete.

  Moreover, since the arrangement interval of the hoop bars is not reduced, the concrete flow does not become a major obstacle when the concrete is placed, and the concrete does not reach every corner. As a result, generation of undesirable nests in the concrete can be prevented. In addition, the material cover can be reduced because the concrete cover thickness is not required. Moreover, since the size of the reinforced concrete structure itself does not increase, the space in the structure can be effectively used.

  Further, it is not necessary to process the steel bars in a special shape as a hoop bar by overlapping the reinforcing bars as shown in Patent Document 1, and the cost can be reduced because the existing hoop bar which is a general-purpose product can be used.

Further, the reinforcing structure for unit reinforcing bars according to claim 2 of the present invention is the reinforcing structure for unit reinforcing bars according to claim 1,
The reinforcing bars that reinforce the unit reinforcing bars are characterized in that the extending portions are bundled with the corresponding main reinforcing bars and the binding wires.

According to the reinforcing bar for a unit reinforcing bar according to claim 2 of the present invention, since the main reinforcing bar and the reinforcing bar are bound by the binding wire, the conventional unit reinforcing bar is affected by an external force caused by an unexpected external factor. The relative position of the main bars such as unit rebars does not occur and the arrangement state of each other is maintained correctly.

  Therefore, there is no relative displacement between the main bars when transporting the unit rebars or when placing the unit rebars at the construction site, without causing unnecessary work such as reassembling the rebars at the construction site of the reinforced concrete. That's it. Moreover, the cover thickness as designed can be secured. Further, the relative position between the main bars is not caused by the flow force of the concrete having poor fluidity at the time of placing, and the strength of the reinforced concrete itself is not reduced.

  Moreover, since the reinforcing bars are bound together using a binding wire, it is not necessary to weld them. Therefore, there is no possibility that the strength of the reinforcing bars will be reduced due to the non-uniformity of the reinforcing bars or the quality deterioration. Moreover, the troublesome welding work which an operator welds the contact part of many rebars for every place does not generate | occur | produce. In addition, there is no quality variation due to welding by unskilled workers. That is, 100% or more of strength and quality can be maintained with respect to the numerical values related to quality and strength listed in the structural calculation. Further, when reinforced concrete is used as a structure, it is possible to avoid stress concentration at the binding portion of the reinforcing bars due to unexpected external factors such as earthquakes, and to prevent a decrease in strength of the reinforced concrete.

  In addition, the material cover can be reduced because the concrete cover thickness is not required. Moreover, since the size of the reinforced concrete structure itself does not increase, the space in the structure can be effectively used.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to prevent the relative position shift of reinforcing bars without welding, the reinforcement structure of the unit reinforcing bar which raises the intensity | strength of a reinforced concrete can be provided.

It is a perspective view which shows the reinforcement structure for unit reinforcing bars which concerns on embodiment of this invention. It is sectional drawing which shows the reinforcement structure for unit reinforcing bars shown in FIG. It is a perspective view which shows the reinforcing bar used for the reinforcing structure for unit reinforcing bars shown in FIG. It is sectional drawing corresponding to FIG. 2 which shows the various aspects of the reinforcement structure for unit reinforcing bars which concerns on embodiment of this invention. FIG. 2 is a perspective view corresponding to FIG. 1 and showing various aspects of the reinforcing structure for unit reinforcing bars according to the embodiment of the present invention. It is explanatory drawing explaining the reinforcement structure of the connection part of the unit reinforcing bars which concern on embodiment of this invention. It is a perspective view corresponding to Drawing 3 showing the 1st modification concerning the embodiment of the present invention, the 2nd modification, and the 3rd modification. FIG. 10 is a perspective view corresponding to FIG. 3 and showing a fourth modification, a fifth modification, and a sixth modification according to the embodiment of the present invention. It is a perspective view corresponding to Drawing 3 showing the 7th modification concerning the embodiment of the present invention, the 8th modification, and the 9th modification. It is a perspective view corresponding to Drawing 3 showing the 10th modification and an 11th modification concerning an embodiment of the present invention. It is explanatory drawing explaining the state of the malfunction in the conventional unit reinforcement.

  Hereinafter, a reinforcing structure for reinforcing bars according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a reinforcing structure for unit reinforcing bars according to an embodiment of the present invention. Moreover, FIG. 2 is sectional drawing which shows the reinforcement structure for unit reinforcing bars shown in FIG. FIG. 3 is a perspective view showing a reinforcing bar used in the unit reinforcing bar reinforcing structure shown in FIG.

  The reinforcing bar structure according to the present embodiment is used as a pillar structure as a structure such as a building. The reinforcing bar structure includes a unit reinforcing bar and a reinforcing bar 10 that reinforces the unit reinforcing bar.

  The unit rebar is a metal for fixing the main rebar 2 composed of rebar that acts on the bending moment of reinforced concrete, the hoop 3 composed of rebar that intersects the main rebar 2 and acts on the shearing force, and the contact portion between the rebars. It is composed of a binding wire 4 (schematically illustrated in FIG. 1) made of a wire made of metal.

  As shown in FIG. 2, the main reinforcement 2 includes a first main reinforcement 2a, a second main reinforcement 2b, a third main reinforcement 2c, and a fourth main reinforcement 2d extending corresponding to the structure of the reinforced concrete. 2 are arranged in parallel with a predetermined interval as shown in FIG.

  Although not shown in detail here, the hoop line 3 is composed of a bent portion and a hook portion. The bent portions are bent so as to be in contact with each main bar 2 at right angles and are arranged in a state surrounding each main bar 2. Moreover, the hook part formed in the both ends of the hoop muscle 3 is engaged with the 1st main reinforcement 2a, as shown in FIG. The hoop bars 3 are arranged at predetermined intervals in the extending direction of the main bars 2.

  On the other hand, as shown in FIG. 3, the reinforcing bar 10 includes a first extending part 11 a extending a predetermined distance in the axial direction of the main bar 2 and a first extending part 11 a extending in parallel to the first extending part 11 a. It is comprised from the connection part 12 which connects the extension part 11b of 2 and the edge part of the same direction of each extension part 11. As shown in FIG.

  1 and 2, the reinforcing bars 10 are bound to the unit reinforcing bars 2 b and the main bars 2 c adjacent to each other via the binding wire 4 and are spaced along the main bars 2 by a predetermined interval. Are bound to any three adjacent hoop muscles 3 through binding wires 4.

  By providing the reinforcing bars 10 in this manner, it is possible to prevent the relative displacement between the main bars 2 and the hoop bars 3. That is, the distance (span) between the hoop bars attached to the main bar 2 becomes uneven due to the influence of an external force caused by an unexpected external factor caused when the unit reinforcing bar is assembled or transported, or the main bars are misaligned. And the structure of the unit rebar itself is kept constant. Thus, the reinforcement structure which reinforces one unit reinforcement by providing the reinforcement bar 10 is implement | achieved.

  Next, a method for constructing a pillar as a structure such as a building by the reinforcing structure of a reinforcing bar according to the present embodiment will be described. In describing this enforcement method, a method for manufacturing a unit reinforcing bar reinforced by the reinforcing bar 10, a method for manufacturing the reinforcing bar 10, and a method for assembling the reinforcing bar 10 to the unit reinforcing bar will be described in this order. When manufacturing a unit reinforcing bar, a reinforcing bar for main bars and a reinforcing bar for hoop bars, which are first cut to a predetermined length, are prepared. Next, in this embodiment, the bent portion and the hook portion are formed by the bending machine in the hoop reinforcing bar. Next, the processed main bar 2 and the processed hoop bar 3 are arranged at predetermined positions by a jig, and the contact portion of each bar is fixed by a binding wire 4 to form a unit bar.

  Next, when the reinforcing bar 10 is manufactured, a reinforcing bar for the reinforcing bar that is first cut to a predetermined length is prepared. Next, in this embodiment, the reinforcing part 11 and the connecting part 12 are formed by a bending machine. Next, the reinforcing bars 10 are assembled to the unit reinforcing bars. At this time, the processed reinforcing bar 10 is inserted into a space formed by the unit reinforcing bar from one side opening end portion in the extending direction of the unit reinforcing bar, and is disposed at a predetermined position. As shown in FIGS. 1 and 2, the reinforcing bar 10 is bound to each of the first main bar 2a and the second main bar 2b of the unit reinforcing bar and any three adjacent hoop bars 3 by using the binding wires 4. To do. In this embodiment, the reinforcing bars 10 are assembled after the unit reinforcing bars are formed. However, the reinforcing bars 10 may be assembled when the unit reinforcing bars are assembled.

  Next, a method for carrying unit reinforcing bars having a reinforcing structure into a construction site will be described. Unit rebars assembled with reinforcing bars 10 manufactured at a factory or the like are loaded together with a plurality of unit rebars on a transportation means such as a truck, and carried to a construction site. Next, the plurality of unit reinforcing bars are temporarily placed in a predetermined space at the construction site to complete the loading of the unit reinforcing bars.

  Next, a method of constructing the unit reinforcing bar with the reinforcement structure that has been carried in as a pillar of a structure such as a building will be described. The unit reinforcing bars are arranged at appropriate positions where the columns are to be enforced, and the unit reinforcing bars are connected to each other as shown in FIG. Here, in FIG. 6, for example, a reinforcing bar 10 is further extended to the right end of the main reinforcing bar 2 of the unit reinforcing bar shown by the solid line on the left side, and the reinforcing bar 10 is shown as a broken line on the right side of the figure. Connect to the left end of In some cases, rod-shaped connecting members (not shown) that connect the main reinforcing bars may be used when connecting the unit reinforcing bars.

  Next, a mold for forming the column is arranged around the unit reinforcing bar. Next, concrete is poured into the mold to form columns. Then, after curing the concrete for a certain period, the formwork is removed to form the pillar of the structure.

  Next, an effect | action at the time of constructing as a pillar of structures, such as a building, using the unit reinforcement which gave such a reinforcement structure is demonstrated. Since the three adjacent hoop muscles 3 (sturlap) and the reinforcing bars 10 are bound together by the binding wire 4, even if they are affected by an external force or the like due to an unexpected external factor during transportation or construction, the conventional inconvenience is caused. It is not necessary to make the arrangement interval of the hoop bars uniform as shown in FIG. 11 (a) in which the above points are clarified, and the unit reinforcing bars are kept in a prescribed arrangement state. Further, since the main reinforcing bars 2 and the reinforcing bars 10 are bound by the binding wire 4, there is no relative displacement between the main reinforcing bars as shown in FIG. keep.

  Therefore, there is no relative displacement between the reinforcing bars when transporting the unit rebars or when placing the unit rebars at the construction site, and without causing extra work such as reassembling the reinforcing bars at the construction site of the reinforced concrete. That's it. Moreover, the cover thickness as designed can be secured. Further, the relative position between the reinforcing bars is not caused by the fluid force of the concrete having poor physical properties at the time of placing, and the strength of the reinforced concrete itself is not reduced.

  Moreover, since the reinforcing bars are bound together using the binding wire 4, it is not necessary to weld them. Therefore, there is no possibility that the strength of the reinforcing bars will be reduced due to the non-uniformity in the material properties of the reinforcing bars due to the influence of welding or the quality deterioration. Moreover, the troublesome welding work which an operator welds the contact part of many rebars for every place does not generate | occur | produce. Further, there is no quality variation caused by welding by unskilled workers. That is, 100% or more of strength and quality can be maintained with respect to the numerical values related to quality and strength listed in the structural calculation. Further, when reinforced concrete is used as a structure, it is possible to avoid stress concentration on the welded portion between the reinforcing bars due to unexpected external factors such as earthquakes, and to prevent strength reduction of the reinforced concrete.

  In addition, since the arrangement interval of the hoop bars 3 is not reduced, the concrete flow does not become a major obstacle when placing concrete, and the concrete does not reach every corner. As a result, generation of undesirable nests in the concrete can be prevented. In addition, material cost can be reduced because no extra cover thickness of concrete is required. In addition, since the size of the reinforced concrete structure itself does not increase, the space around the reinforced concrete can be effectively utilized.

  In addition to increasing the strength of the connecting portion of the unit reinforcing bars by attaching the reinforcing bars 10 to the connecting portions (joints) of the unit reinforcing bars, a so-called guide (guide member) when the reinforcing bars 10 connect the unit reinforcing bars. ) And enables easy connection of unit rebars.

  Moreover, it is not necessary to process the special shape which makes a hoop reinforcement | strike by multiplying the reinforcing bars as shown in patent document 1, and it contributes to cost reduction since the existing hoop reinforcement which is a general-purpose product can be used as it is.

  In attaching the reinforcing bars 10 to the unit reinforcing bars, the reinforcing bars 10 are respectively connected to the second main bars 2b, the fourth main bars 2d and the hoop bars 3 which are not adjacent to each other by the tie wires 4 as shown in FIG. Even if they are bound, the same effects and operations as in this embodiment are exhibited. Similarly, as shown in FIG. 4B, even if the reinforcing bar 10 is bound to each of the third main bar 2c and the fourth main bar 2d by the binding line 4, the same effects and operations as in the present embodiment are exhibited. To do.

  Further, when attaching the reinforcing bars 10 to the unit reinforcing bars, as shown in FIG. 4 (c), a plurality of reinforcing bars 10 (two in FIG. 4 (c)) are used so as to form an X shape in an end view. Even if the reinforcing bars 10 are bound to the main bars 2 and the corresponding hoop bars 3 that are located diagonally to each other, the same effects and operations as in the present embodiment can be exhibited, and the strength can be further increased.

  Moreover, even if the reinforcing bar 10 is attached to the outside of the unit reinforcing bar and bound to the main bar 2 and the hoop bar 3 as shown in FIG. 4D, the same effects and operations as in this embodiment are exhibited. In this case, since the reinforcing bar 10 is attached from the outside of the unit reinforcing bar, the workability of attaching the reinforcing bar 10 to the unit reinforcing bar is improved. Therefore, it is possible to attach the reinforcing bar 10 to the unit reinforcing bar very easily if necessary while checking the situation at the construction site, and the degree of reinforcement of the unit reinforcing bar can be changed according to the situation.

  Further, as shown in FIG. 5, one reinforcing bar 10 may be bound with four main bars 2 and any three adjacent hoop bars 3 with a binding line 4 schematically shown in the drawing. As a result, the same effects and operations as in this embodiment can be exhibited. In addition, it cannot be overemphasized that the number of the main reinforcement 2 and the hoop reinforcement 3 bundled through one reinforcement reinforcement 10 is not limited to the above-mentioned form.

  Hereinafter, modifications of the present embodiment will be described. FIG. 7 is a perspective view corresponding to FIG. 3 and showing a first modification, a second modification, and a third modification according to the embodiment of the present invention. FIG. 8 is a perspective view corresponding to FIG. 3 and showing a fourth modification, a fifth modification, and a sixth modification according to the embodiment of the present invention. FIG. 9 is a perspective view corresponding to FIG. 3 and showing a seventh modification, an eighth modification, and a ninth modification according to the embodiment of the present invention. FIG. 10 is a perspective view corresponding to FIG. 3 and showing a tenth modification and an eleventh modification according to the embodiment of the present invention.

  Like the reinforcing bars 1-1 according to the first modification of the present embodiment shown in FIG. 7A, the distal ends of the extending portions 11 of the reinforcing bars 10 according to the present embodiment are opposed to each other, and the distal ends are mutually connected. A bent portion 13 may be provided in which the end portion of each extending portion 11 is bent in an L shape so that the distance between them is shorter than the length of the connecting portion 12. In this case, in addition to exhibiting the same effect as the present embodiment by binding the hoop bars 3 and the binding wires 4 at the bent portions 13 as well, the reinforcing structure further increases the rigidity of the unit reinforcing bars. Can be realized.

  Further, like the reinforcing bar 1-2 according to the second modification of the present embodiment shown in FIG. 7B, in a vertical direction from the plane including the first extending portion 11a and the second extending portion 11b. Therefore, the bent portion 13 which is bent in the same direction may be provided at the distal end portion of the extending portion 11 of the reinforcing bar 10 in the present embodiment. In this case, in addition to exhibiting the same effect as the present embodiment by binding the hoop bars 3 and the binding wires 4 at the bent portions 13 as well, the reinforcing structure further increases the rigidity of the unit reinforcing bars. Can be realized.

  Further, like the reinforcing bar 1-3 according to the third modified example of the present embodiment shown in FIG. 7C, instead of the connecting portion 12 of the reinforcing bar 10 in the present embodiment, it is bent in an L shape in the end view. Alternatively, the first connecting portion 12a and the second connecting portion 12b may be used. In this case, the plane including the first extending portion 11a and the first connecting portion 12a and the plane including the second extending portion 11b and the second connecting portion 12b intersect at a right angle. At this time, by binding the first connecting portion 12a and the second connecting portion 12b with the corresponding side portions of the hoop muscles 3 and the binding wires 4, the same effects as the present embodiment can be exhibited. In addition, a reinforcing structure that further increases the rigidity of the unit reinforcing bar can be realized.

  Moreover, after providing the basic structure of the reinforcing bar 1-3 in the reinforcement structure of a 3rd modification like the reinforcing bar 1-4 which concerns on the 4th modification of this embodiment shown to Fig.8 (a). A bent portion 13 bent in an L shape upward from the tip of the first extending portion 11a and a bent portion bent in an L shape downward from the tip of the second extending portion 11b. The part 13 may be provided. In this case, even in the portions of the bent portions 13, the basic configuration of exhibiting the same effect as that of the third modified example is obtained by binding the corresponding side portions of the hoop muscle 3 with the binding wires 4. In the above, it is possible to realize a reinforcing structure that further increases the rigidity of the unit rebar.

  Moreover, after having provided the basic structure of the reinforcing bar 1-3 in the reinforcement structure of a 3rd modification like the reinforcing bar 1-5 which concerns on the 5th modification of this embodiment shown in FIG.8 (b). , From the front end of the first extending portion 11a toward the front side in the figure (in a direction on the plane including the first extending portion 11a and the first connecting portion 12a and approaching the second extending portion 11b). The bent portion 13 bent in an L-shape and the downward direction in the figure from the tip of the second extending portion 11b (on the plane including the second extending portion 11b and the second connecting portion 12b, the first A bent portion 13 that is bent in an L shape may be provided in a direction approaching the extending portion 11a. In this case, in addition to demonstrating the same operation effect as a 3rd modification by binding with the side part to which each hoop muscle 3 respond | corresponds, and the binding wire 4 also in the part of each bending part 13, in addition, A reinforcing structure that further increases the rigidity can be realized.

  Further, like a reinforcing bar 1-6 according to the sixth modification of the present embodiment shown in FIG. 8C, the plane including the first extension portion 11a and the second extension portion 11b is perpendicularly moved. Even if the bent L-shaped bent portion 14 is provided at one end of each of the extending portions 11a and 11b of the reinforcing bar 10 in the present embodiment, and the end of each bent portion 14 is connected by the connecting portion 12. good. In this case, in addition to exhibiting the same effects as the present embodiment by binding the corresponding bent portions 13 with the corresponding side portions of the hoop bars 3 and the binding wires 4, the rigidity of the unit reinforcing bars It is possible to realize a reinforcing structure that further increases

  Further, as in the reinforcing bar 1-7 according to the seventh modification of the present embodiment shown in FIG. 9A, the bent portion 13 bent in an L shape so as to face each other is reinforced in the sixth modification. You may provide in the front-end | tip part of the extension part 11 of the line | wire 1-6. Further, by binding the bent portion 13 with the corresponding side portions of the hoop bars 3 and the binding wires 4, in addition to exhibiting the same effects as the sixth modified example, the rigidity of the unit reinforcing bars is further increased. An enhanced reinforcing structure can be realized.

  Further, like the reinforcing bar 1-8 according to the eighth modification of the present embodiment shown in FIG. 9B, the plane extending from the plane including the first extension portion 11a and the second extension portion 11b is perpendicular to the vertical direction. You may provide the bending part 13 bent in the front-end | tip part of the extension part 11 of the reinforcement 1-6 in a 6th modification. In this case, in addition to demonstrating the same effect as the sixth modified example by binding the corresponding bent portions 13 with the corresponding side portions of the hoop bars 3 and the binding wires 4, the unit reinforcing bars A reinforcing structure that further increases the rigidity can be realized.

  Further, like the reinforcing bars 1-9 according to the ninth modification of the present embodiment shown in FIG. 9C, the first extending portion 11a and the second extending portion are arranged in parallel to each other and away from each other. The existing portions 11b may be formed so as to extend in alternate directions away from both ends of the connecting portion 12. In this case, in addition to linking the connecting portions of the reinforcing bars 1-9 to the hoop bars 3 with the binding wires 4 and binding them with the main bars 2 and the binding wires 4, the same effects as the present embodiment are exhibited. Thus, it is possible to provide a reinforcing structure capable of reinforcing the unit reinforcing bar over a wide range.

  Further, like the reinforcing bar 1-10 according to the tenth modified example of the present embodiment shown in FIG. 10A, the basic structure of the reinforcing bar 1-9 in the reinforcing structure of the ninth modified example is provided. L from the front end of the first extension portion 11a in the downward direction in the figure (a direction including the first extension portion 11a and the second extension portion 11b and approaching the second extension portion 11b). From the front end of the bent portion 13 and the second extending portion 11b bent in a letter shape, the upper direction in the figure (a plane including the first extending portion 11a and the second extending portion 11b and the first extending portion). You may provide the bending part 13 bent in L shape in the direction which approaches the existing part 11a. And in the part of this bending part 13, in addition to exhibiting the effect similar to a 9th modification by bundling by the side part to which each hoop muscle 3 respond | corresponds, and the binding wire 4, the rigidity of a unit rebar It is possible to realize a reinforcing structure that further increases

  Moreover, after having comprised the basic structure of the reinforcement 1-9 in the reinforcement structure of a 9th modification like the reinforcement 1-11 which concerns on the 11th modification of this embodiment shown in FIG.10 (b), A bent portion 13 bent in an L shape from the tip of the first extending portion 11a in the front direction in the figure (a direction perpendicular to the plane including the first extending portion 11a and the second extending portion 11b); From the tip of the second extension portion 11b toward the front in the figure (the direction perpendicular to the plane including the first extension portion 11a and the second extension portion 11b and bending of the first extension portion 11a) A bent portion 13 bent in an L shape may be provided in the same direction as the portion 13. And in the part of this bending part 13, in addition to exhibiting the effect similar to a 9th modification by bundling by the side part to which each hoop muscle 3 respond | corresponds, and the binding wire 4, the rigidity of a unit rebar It is possible to realize a reinforcing structure that further increases

  In the present embodiment, four main reinforcing bars 2 are used, but the present invention is not limited to this. For example, a unit reinforcing bar having three main reinforcing bars 2 or a unit reinforcing bar having five or more main reinforcing bars is also used. It goes without saying that the invention is applicable.

  Further, in the present embodiment, the hoop muscle 3 bound to one reinforcing bar 10 is any three adjacent hoop muscles 3, but is not necessarily limited thereto, and is bound to one reinforcing bar 10. The number of hoop muscles 3 may be two or four or more.

  Furthermore, it goes without saying that various modifications can be applied without being limited to the embodiment shown in the drawings in addition to the above-described modifications as long as the effects of the present invention can be exhibited.

  In addition, the present invention is not limited to the scope of application of the present embodiment, and can be applied to beams and columns of small-scale detached houses as well as general structures of reinforced concrete such as large-scale buildings and bridges. Needless to say, it is applicable to a wide range.

1 unit reinforcement 2 main reinforcement (2a, 2b, 2c, 2d)
2a 1st principal muscle 2b 2nd principal muscle 2c 3rd principal muscle 2d 4th principal muscle 3 Hoop muscle 4 Binding line 10 Reinforcement 11 Extension part (11a, 11b)
11a 1st extension part 11b 2nd extension part 12 Connection part (12a, 12b)
12a 1st connection part 12b 2nd connection part 13 Bending part 14 L-shaped bending part 20 Concrete

Claims (2)

In the reinforcing structure of unit rebar used for reinforced concrete,
At least three main bars extending at a predetermined interval from each other in the extending direction of the unit reinforcing bars, and the main bars are bent so as to be in contact with each other in a state of being orthogonal to the main bars. A unit reinforcing bar for reinforced concrete, comprising at least two hoop bars arranged at equal intervals in the direction of orientation, and a binding wire that is bound to hold the relative position of each other at a contact portion between the main bar and the hoop bar ,
A reinforcing bar for reinforcing the unit reinforcing bar, and a reinforcing structure for the unit reinforcing bar comprising:
The reinforcing bars are formed by bending one reinforcing bar, and two extending portions extending correspondingly along two different main bars among the at least three main bars , a connecting portion for connecting the ends of the hand of the extending portion, and the other end portion of the extending portion bent portion bent in L-shape is formed,
Reinforcement for reinforcing the unit rebar, the extending portion is in contact in a state of being perpendicular to the hoop adjacent the at least two each, wherein the hoop is the tie wire and the extending portion in the contact portion in bunched Rutotomoni, reinforced structure of the unit rebar, wherein the hoop and the bent portion is also tied by the binding wire.   2. The reinforcing structure of a unit reinforcing bar according to claim 1, wherein the reinforcing bar for reinforcing the unit reinforcing bar is formed by binding the extension portions to the corresponding main reinforcing bars and the binding wires.

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