Assembly jig for rebar units and method for assembling rebar units

Abstract

The present invention provides an assembly jig and assembly method for reinforcing steel units that can improve the work efficiency of the assembly process of reinforcing steel units. [Solution] The assembly jig 20 for the rebar unit comprises a main body 21, a first engaging part 30, and a second engaging part 40. The main body 21 extends in a first direction X. The first engaging part 30 clamps the first longitudinal reinforcing bar 13 in the first direction X. The second engaging part 40 clamps the second longitudinal reinforcing bar 15 in the first direction X. The main body 21 has a connecting part 22 that connects the first transverse reinforcing bar 12 and the second transverse reinforcing bar 14 so that the first transverse reinforcing bar 12 and the second transverse reinforcing bar 14 extend in the first direction X and are aligned in the first direction X.

Description

[Technical Field]

[0001] The present disclosure relates to an assembly jig for a reinforcing bar unit and an assembly method for a reinforcing bar unit. [Background Art]

[0002] The reinforcing bar unit described in Patent Document 1 includes a bar mesh in which a plurality of horizontal bars intersect with a plurality of vertical bars. [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 2018-12989 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] As one form of a reinforcing bar unit, a plurality of bar meshes may be linearly connected via joint bars. In this case, the reinforcing bar unit is assembled by connecting a new bar mesh to an existing self-supporting bar mesh. In such assembly work of a reinforcing bar unit, it is necessary to measure the spacing between adjacent two bar meshes and adjust the position of the new bar mesh so that the spacing between the bar meshes becomes a predetermined spacing. Furthermore, to prevent the new bar mesh from falling over, it is necessary to perform the connecting work while supporting the new bar mesh in a state where the spacing between the bar meshes is kept at the predetermined spacing. [Means for Solving the Problem]

[0005] (1) An assembly jig for a reinforcing bar unit that solves the above problem comprises a first bar mesh in which a plurality of first transverse bars and a plurality of first longitudinal bars intersect, and a second bar mesh in which a plurality of second transverse bars and a plurality of second longitudinal bars intersect, wherein the first transverse bars and the second transverse bars extend in the same direction, and the first bar mesh and the second bar mesh are connected via splice bars in the direction in which the first transverse bars and the second transverse bars extend, and is used in the assembly work of a reinforcing bar unit, comprising a main body portion extending in a first direction, a first engaging portion that clamps the first longitudinal bars in the first direction, and a second engaging portion that clamps the second longitudinal bars in the first direction, wherein the main body portion has a connecting portion that connects the first transverse bars and the second transverse bars so that the first transverse bars and the second transverse bars extend in the first direction and are aligned in the first direction.

[0006] In this configuration, the first engaging portion determines the position of the assembly jig relative to the first bar mesh in the first direction. The second engaging portion determines the position of the assembly jig relative to the second bar mesh in the first direction. Therefore, the spacing between the first bar mesh and the second bar mesh in the first direction is determined. Furthermore, the connecting portion allows the second bar mesh to stand on its own by connecting the second transverse bar of the second bar mesh to the first transverse bar of the self-supporting first bar mesh.

[0007] Therefore, workers do not need to measure the distance between the first and second bar meshes or adjust the position of the second bar mesh relative to the first bar mesh so that the distance between them is the predetermined distance. Furthermore, workers do not need to support the second bar mesh while performing the connection work with the distance between the first and second bar meshes predetermined. Consequently, the work efficiency of assembling the reinforcing bar units is improved.

[0008] (2) In the assembly jig for the reinforcing bar unit described in (1) above, the main body further has a support portion that supports the joint reinforcing bar along the first transverse reinforcing bar and the second transverse reinforcing bar connected by the connecting portion.

[0009] With this configuration, workers do not need to support the connecting reinforcement bars along the first and second horizontal reinforcement bars while performing the connection work. Therefore, the work efficiency of assembling the reinforcement bar units is improved.

[0010] (3) In the assembly jig for the reinforcing bar unit described in (2) above, the connecting portion sandwiches the first transverse bar and the second transverse bar in a second direction perpendicular to the first direction. In this configuration, the first bar mesh and the second bar mesh are supported in a second direction by the connecting portion. Therefore, the first bar mesh and the second bar mesh can be made to stand stably on their own.

[0011] (4) In the assembly jig for the reinforcing bar unit described in (3) above, the connecting portion has a groove that opens downward, the support portion is located below the connecting portion, and the main body has a connecting portion that connects the connecting portion and the support portion and is located in the region where the first longitudinal reinforcement and the second longitudinal reinforcement are arranged among two regions that sandwich the first transverse reinforcement and the second transverse reinforcement in the second direction, a space partitioned by the connecting portion, the support portion, and the connecting portion, in which the first transverse reinforcement, the second transverse reinforcement and the joint reinforcement are arranged, and an opening that opens in the second direction on the side opposite to the connecting portion so that the inside and outside of the space are in communication with respect to the first transverse reinforcement and the second transverse reinforcement.

[0012] With this configuration, the splice bars are positioned below the first and second transverse bars, resulting in a more stable connection when the splice bars are connected to the first and second transverse bars compared to when they are positioned in a second direction aligned with the first and second transverse bars.

[0013] Furthermore, the first and second transverse reinforcements can enter and exit the groove through the opening. Therefore, after connecting the second bar mesh to the first bar mesh via the connecting reinforcement, the assembly jig can be removed from the reinforcement unit.

[0014] If the assembly jig is configured in such a way that it cannot be removed from the rebar unit, the assembly jig is embedded together with the rebar unit within the concrete of the foundation. In this case, the concrete does not come into contact with the parts of the first and second bar meshes where the assembly jig is attached, thus reducing the integrity between the concrete and the rebar unit. Furthermore, since the assembly jig is permanently embedded, it incurs additional costs.

[0015] In contrast, in the above configuration, the assembly jig is designed to be detachable from the rebar unit. Therefore, the concrete section and the rebar unit can be brought into contact, improving the overall integrity between the concrete section and the rebar unit. Furthermore, since the assembly jig can be reused, costs can be reduced.

[0016] (5) In the assembly jig for the reinforcing bar unit described in (4) above, the support portion has a mounting surface on which the joint reinforcing bar is placed, the connecting portion has a facing surface that faces the joint reinforcing bar, and the first engaging portion and the second engaging portion are each provided at a position away from the intersection where the mounting surface and the facing surface intersect when viewed from the first direction.

[0017] With this configuration, when tying the first transverse reinforcement, the first longitudinal reinforcement, and the joint reinforcement with a tying member, the tying member can be passed between the joint reinforcement and the first engaging portion, so the first engaging portion is less likely to get in the way of the tying work. When tying the second transverse reinforcement, the second longitudinal reinforcement, and the joint reinforcement with a tying member, the tying member can be passed between the joint reinforcement and the second engaging portion, so the second engaging portion is less likely to get in the way of the tying work.

[0018] (6) A method for assembling a reinforcing bar unit that solves the above problems is a method for assembling a reinforcing bar unit using the reinforcing bar unit assembly jig described in (1) to (5) above, wherein the reinforcing bar unit comprises a first bar mesh in which a plurality of first transverse bars and a plurality of first longitudinal bars intersect, and a second bar mesh in which a plurality of second transverse bars and a plurality of second longitudinal bars intersect, wherein the first transverse bars and the second transverse bars extend in the same direction, and the first bar mesh and the second bar mesh are connected via splice bars in the direction in which the first transverse bars and the second transverse bars extend, and the reinforcing bar unit is self-supporting. The process includes: a temporary connection step of connecting the second bar mesh to the first bar mesh via the assembly jig; an arrangement step of arranging the connecting bars along the first and second transverse bars connected by the connection part; a connection step of connecting the first transverse bars, the first longitudinal bars, and the connecting bars, and connecting the second transverse bars, the second longitudinal bars, and the connecting bars to connect the first bar mesh and the second bar mesh via the connecting bars; and a step of removing the assembly jig from the first bar mesh and the second bar mesh.

[0019] According to this method, in the temporary connection process, the second bar mesh can be made self-supporting by connecting the second transverse reinforcement of the second bar mesh to the first transverse reinforcement of the self-supporting first bar mesh using the connecting portion. In addition, the position of the assembly jig relative to the first bar mesh in the first direction is determined by the first engaging portion. The position of the assembly jig relative to the second bar mesh in the first direction is determined by the second engaging portion. Therefore, the distance between the first bar mesh and the second bar mesh in the first direction is determined.

[0020] Therefore, workers do not need to measure the distance between the first and second bar meshes or adjust the position of the second bar mesh relative to the first bar mesh so that the distance between them is a predetermined distance. Furthermore, workers do not need to support the second bar mesh while performing the connection work with the distance between the first and second bar meshes set to a predetermined distance.

[0021] If the assembly jig is not removed from the reinforcing bar unit even after the second bar mesh is connected to the first bar mesh via the joint reinforcement, the assembly jig is embedded inside the concrete portion of the foundation together with the reinforcing bar unit. In this case, since the concrete portion does not contact the portions of the first bar mesh and the second bar mesh to which the assembly jig is attached, the integrity between the concrete portion and the reinforcing bar unit decreases. Furthermore, since the assembly jig is left embedded, this increases costs.

[0022] In contrast, in the above-mentioned method, the assembly jig is removed from the reinforcing bar unit in the removing step. This allows the concrete portion and the reinforcing bar unit to be brought into contact with each other, so the integrity between the concrete portion and the reinforcing bar unit can be improved. Furthermore, since the assembly jig can be used repeatedly, costs can be reduced.

Effects of the Invention

[0023] According to the assembly jig for a reinforcing bar unit and the assembly method for a reinforcing bar unit of the present disclosure, the workability of the assembly work for the reinforcing bar unit can be improved.

Brief Description of the Drawings

[0024] [Figure 1] It is a plan view of a foundation. [Figure 2] It is a side view of a foundation. [Figure 3] It is a perspective view of an assembly jig. [Figure 4] It is a cross-sectional view of the assembly jig taken along line 4-4 in Fig. 3. [Figure 5] It is a plan view of an assembly jig. [Figure 6] It is a front view of an assembly jig. [Figure 7] It is a cross-sectional view of the assembly jig taken along line 7-7 in Fig. 5. [Figure 8] It is a front view showing a temporary connecting step. [Figure 9] It is a front view showing an arranging step and a connecting step. [Figure 10] It is a cross-sectional view showing a removing step. [Modes for carrying out the invention]

[0025] Referring to Figures 1 to 10, the assembly jig 20 for the reinforcing bar unit 10 and the assembly method for the reinforcing bar unit 10 of this embodiment will be described. <Basic 100> As shown in Figure 1, the foundation 100 comprises a concrete section 110 and a reinforcing bar unit 10. The reinforcing bar unit 10 is installed inside the concrete section 110. The reinforcing bar unit 10 has a plurality of bar meshes 11. The reinforcing bar unit 10 has a mesh intersection section 10a where the bar meshes 11 intersect, and a straight section 10b where the bar meshes 11 are arranged in a straight line. The plurality of bar meshes 11 include a first bar mesh 11a and a second bar mesh 11b. The first bar mesh 11a and the second bar mesh 11b are arranged in a straight line.

[0026] As shown in Figure 2, the first bar mesh 11a has two first transverse bars 12 and multiple first vertical bars 13. Each first transverse bar 12 extends horizontally. The two first transverse bars 12 are spaced apart in the vertical direction Z. In the following description, the upper of the two first transverse bars 12 will be called the first upper transverse bar 12a, and the lower of the first transverse bar 12 will be called the first lower transverse bar 12b. Each first vertical bar 13 extends vertically Z. The multiple first vertical bars 13 are spaced equally apart in the direction in which the first transverse bars 12 extend. The spacing of the first vertical bars 13 in the direction in which the first transverse bars 12 extend will be called the first spacing A1.

[0027] The two first transverse bars 12 and the multiple first longitudinal bars 13 intersect. The first upper transverse bar 12a intersects with the upper ends of the multiple first longitudinal bars 13. The first lower transverse bar 12b intersects with the lower ends of the multiple first longitudinal bars 13. The first transverse bars 12 and the first longitudinal bars 13 are fixed to each other by welding at the intersections. The multiple first longitudinal bars 13 are positioned offset from the multiple first transverse bars 12 in directions perpendicular to both the direction in which the first transverse bars 12 extend and the vertical Z direction.

[0028] The second bar mesh 11b has two second transverse bars 14 and multiple second vertical bars 15. Each second transverse bar 14 extends horizontally. The two second transverse bars 14 are spaced apart in the vertical direction Z. In the following description, the upper of the two second transverse bars 14 will be called the second upper transverse bar 14a, and the lower of the two second transverse bars 14 will be called the second lower transverse bar 14b. Each second vertical bar 15 extends vertically Z. The multiple second vertical bars 15 are spaced equally apart in the direction in which the second transverse bars 14 extend. The spacing of the second vertical bars 15 in the direction in which the second transverse bars 14 extend will be called the second spacing A2. The size of the second spacing A2 is the same as the size of the first spacing A1.

[0029] The two second transverse bars 14 and the multiple second longitudinal bars 15 intersect. The second upper transverse bar 14a intersects with the upper ends of the multiple second longitudinal bars 15. The second lower transverse bar 14b intersects with the lower ends of the multiple second longitudinal bars 15. The second transverse bars 14 and the second longitudinal bars 15 are fixed to each other by welding at the intersections. The multiple second longitudinal bars 15 are positioned offset from the multiple second transverse bars 14 in directions perpendicular to both the direction in which the second transverse bars 14 extend and the vertical Z direction.

[0030] The first transverse reinforcement bars 12 and the second transverse reinforcement bars 14 extend in the same direction. The first bar mesh 11a and the second bar mesh 11b are connected via splice bars 16 in the direction in which the first transverse reinforcement bars 12 and the second transverse reinforcement bars 14 extend. The first upper transverse reinforcement bar 12a and the second upper transverse reinforcement bar 14a are located on the same axis. The first lower transverse reinforcement bar 12b and the second lower transverse reinforcement bar 14b are located on the same axis. Of the multiple first longitudinal reinforcement bars 13, the first longitudinal reinforcement bar 13 closest to the second bar mesh 11b is called the first end longitudinal reinforcement bar 13a. Of the multiple second longitudinal reinforcement bars 15, the second longitudinal reinforcement bar 15 closest to the first bar mesh 11a is called the second end longitudinal reinforcement bar 15a. The distance between the first end longitudinal reinforcement bar 13a and the second end longitudinal reinforcement bar 15a in the direction in which the first transverse reinforcement bars 12 and the second transverse reinforcement bars 14 extend is called the third interval A3. The size of the third interval A3 is the same as the size of the first interval A1.

[0031] The joint reinforcement bar 16 is positioned along the first upper transverse reinforcement bar 12a and the second upper transverse reinforcement bar 14a. In this embodiment, the joint reinforcement bar 16 is located below the first upper transverse reinforcement bar 12a and the second upper transverse reinforcement bar 14a.

[0032] The joint reinforcement bar 16, the first upper transverse reinforcement bar 12a, and the first longitudinal reinforcement bar 13 are bound together by a binding member 17. The joint reinforcement bar 16 is connected to the portion where the first end longitudinal reinforcement bar 13a and the first upper transverse reinforcement bar 12a intersect. In this embodiment, the joint reinforcement bar 16 is further connected to the portion where the first longitudinal reinforcement bar 13 and the first upper transverse reinforcement bar 12a intersect, which is closer to the second bar mesh 11b after the first end longitudinal reinforcement bar 13a. As a result, the joint reinforcement bar 16 is connected to the first bar mesh 11a.

[0033] The joint reinforcement bar 16, the second upper transverse reinforcement bar 14a, and the second longitudinal reinforcement bar 15 are bound together by a binding member 17. The joint reinforcement bar 16 is connected to the point where the second end longitudinal reinforcement bar 15a and the second upper transverse reinforcement bar 14a intersect. In this embodiment, the joint reinforcement bar 16 is further connected to the point where the second longitudinal reinforcement bar 15, which is closer to the first bar mesh 11a after the second end longitudinal reinforcement bar 15a, and the second upper transverse reinforcement bar 14a intersect. As a result, the joint reinforcement bar 16 is connected to the second bar mesh 11b.

[0034] The assembly of the rebar unit 10 is performed by a worker. The worker assembles the rebar unit 10 as follows: First, the worker assembles the mesh intersection 10a by crossing the bar mesh 11. The bar mesh 11 assembled as the mesh intersection 10a is self-supporting. Next, the worker assembles the straight section 10b by connecting other bar meshes 11 to the self-supporting bar mesh 11. As a result, the bar mesh 11 connected to the self-supporting bar mesh 11 also becomes self-supporting. The worker connects other bar meshes 11 to the newly self-supporting bar mesh 11. In this way, the rebar unit 10 is assembled by repeatedly connecting the next bar mesh 11 to the self-supporting bar mesh 11.

[0035] <Assembly jig 20 for rebar unit 10> The assembly jig 20 for the reinforcing bar unit 10 is used in the assembly work of the reinforcing bar unit 10. More specifically, the assembly jig 20 is used in the connection work of connecting the second bar mesh 11b to the self-supporting first bar mesh 11a via the connecting bar 16 during the assembly work of the reinforcing bar unit 10.

[0036] As shown in Figure 3, the assembly jig 20 comprises a main body 21, a first engaging portion 30, and a second engaging portion 40. The main body 21 extends in a first direction X. The main body 21 has a connecting part 22, a support part 23, and a connecting part 24. The connecting part 22 connects the first transverse bar 12 and the second transverse bar 14 so that they extend in the first direction X and are aligned in the first direction X. The support part 23 supports the joint bar 16 along the first transverse bar 12 and the second transverse bar 14 connected by the connecting part 22. The connecting part 24 connects the connecting part 22 and the support part 23.

[0037] As shown in Figure 4, the connecting portion 22 has a groove 22a extending in the first direction X. In this embodiment, the connecting portion 22 is a semi-circular arc shape that is convex upward when viewed from the first direction X. The groove 22a is demarcated by the inner circumferential surface of the connecting portion 22. The groove 22a opens downward. Approximately the upper half of the first transverse bar 12 and approximately the upper half of the second transverse bar 14 are positioned in the groove 22a. The connecting portion 22 sandwiches the first transverse bar 12 and the second transverse bar 14 in the second direction Y, which is perpendicular to the first direction X.

[0038] The connecting portion 22 has a first end 221 and a second end 222. The first end 221 and the second end 222 are ends in the circumferential direction along the arc when viewed from the first direction X. The second end 222 is located on the opposite side of the first end 221. The first end 221 is located in the region where the first longitudinal reinforcement 13 and the second longitudinal reinforcement 15 are arranged, which is one of two regions that sandwich the first transverse reinforcement 12 and the second transverse reinforcement 14 in the second direction Y. The second end 222 is located on the opposite side of the first longitudinal reinforcement 13 and the second longitudinal reinforcement 15 from the first transverse reinforcement 12 and the second transverse reinforcement 14 in the second direction Y.

[0039] The support portion 23 has a mounting surface 23a on which the joint reinforcement bar 16 is placed. The support portion 23 supports the joint reinforcement bar 16 by placing it on the mounting surface 23a. The support portion 23 is provided in the vicinity of the connecting portion 22. In this embodiment, the support portion 23 is located below the connecting portion 22. The joint reinforcement bar 16 is arranged between the first transverse reinforcement bar 12 and the second transverse reinforcement bar 14 and the support portion 23 in the vertical direction Z. The support portion 23 in this embodiment has a hollow structure.

[0040] The connecting portion 24 connects the first end portion 221 of the connecting portion 22 to the support portion 23 in the vertical direction Z. The connecting portion 24 is located in the region where the first longitudinal reinforcement 13 and the second longitudinal reinforcement 15 are arranged, which is one of two regions that sandwich the first transverse reinforcement 12 and the second transverse reinforcement 14 in the second direction Y. The connecting portion 24 has an opposing surface 24a that faces the joint reinforcement 16 when the joint reinforcement 16 is supported by the support portion 23. The opposing surface 24a is perpendicular to the mounting surface 23a.

[0041] The main body 21 has an arrangement space 21a partitioned by a connecting portion 22, a support portion 23, and a joint portion 24. The first transverse reinforcement bar 12, the second transverse reinforcement bar 14, and the joint reinforcement bar 16 are arranged in the arrangement space 21a. The main body 21 has an opening 21b that opens in the second direction Y so that the inside and outside of the arrangement space 21a are in communication with respect to the first transverse reinforcement bar 12 and the second transverse reinforcement bar 14 on the side opposite to the joint portion 24. The opening 21b is formed by the gap between the second end portion 222 of the connecting portion 22 and the support portion 23.

[0042] As shown in Figures 5 and 6, the first engaging portion 30 is provided at the first end of the main body portion 21 in the first direction X. The second engaging portion 40 is provided at the second end of the main body portion 21 in the first direction X. Therefore, the main body portion 21 is located between the first engaging portion 30 and the second engaging portion 40 in the first direction X.

[0043] The first engaging portion 30 includes two first horizontal plates 31, a first connecting portion 32, and two first vertical plates 33. Each first horizontal plate 31 in this embodiment is plate-shaped and extends horizontally. The two first horizontal plates 31 are spaced apart in the first direction X. The spacing between the first horizontal plates 31 in the first direction X is slightly larger than the outer diameter of the first vertical reinforcement 13. The first connecting portion 32 connects the two first horizontal plates 31 in the first direction X. The first connecting portion 32 is located in the second direction Y on the opposite side of the two first horizontal plates 31 from the connecting portion 22. The first vertical plate 33 connects the first horizontal plates 31 and the first connecting portion 32. The upper surface of the first vertical plate 33 is an inclined surface that slopes downward as it moves away from the first connecting portion 32 (see Figure 3).

[0044] The first groove 30a is defined by two first horizontal plates 31, a first connecting portion 32, and two first vertical plates 33. The first groove 30a extends in the vertical direction Z. A first vertical reinforcement bar 13 is positioned in the first groove 30a. In the second direction Y, the first groove 30a opens on the side opposite to the first connecting portion 32 relative to the first vertical reinforcement bar 13. When positioned within the first groove 30a, the first vertical reinforcement bar 13 is located between the two first horizontal plates 31 and between the two first vertical plates 33 in the first direction X. Therefore, the first engaging portion 30 clamps the first vertical reinforcement bar 13 in the first direction X.

[0045] The second engagement portion 40 includes two second horizontal plates 41, a second connecting portion 42, and two second vertical plates 43. Each second horizontal plate 41 in this embodiment is a plate extending horizontally. The two second horizontal plates 41 are spaced apart in the first direction X. The spacing between the second horizontal plates 41 in the first direction X is slightly larger than the outer diameter of the second vertical reinforcement 15. The second connecting portion 42 connects the two second horizontal plates 41 in the first direction X. The second connecting portion 42 is located in the second direction Y on the opposite side of the two second horizontal plates 41 from the connecting portion 22. The second vertical plate 43 connects the second horizontal plates 41 and the second connecting portion 42. The upper surface of the second vertical plate 43 is an inclined surface that slopes downward as it moves away from the second connecting portion 42 (see Figure 3).

[0046] The second groove 40a is defined by two second horizontal plates 41, a second connecting portion 42, and two second vertical plates 43. The second groove 40a extends in the vertical direction Z. The second vertical reinforcement bar 15 is positioned in the second groove 40a. The second groove 40a opens in the second direction Y on the side opposite to the second connecting portion 42 relative to the second vertical reinforcement bar 15. When positioned within the second groove 40a, the second vertical reinforcement bar 15 is located between the two second horizontal plates 41 and between the two second vertical plates 43 in the first direction X. Therefore, the second engaging portion 40 clamps the second vertical reinforcement bar 15 in the first direction X.

[0047] As shown in Figure 5, distance L is defined as the distance between the first groove 30a and the second groove 40a in the first direction X. More specifically, distance L is the distance from the surface of the first horizontal plate 31 closest to the main body 21 that faces the first vertical reinforcement 13, to the surface of the second horizontal plate 41 closest to the main body 21 that faces the second vertical reinforcement 15. The magnitude of distance L is the same as the magnitude of the first interval A1.

[0048] As shown in Figure 7, the second engaging portion 40 of this embodiment is located away from the intersection 21c where the mounting surface 23a of the support portion 23 and the opposing surface 24a of the connecting portion 24 intersect, when viewed from the first direction X. The second engaging portion 40 is located below the mounting surface 23a in the vertical direction Z, and on the opposite side of the connecting portion 22 to the connecting portion 24 in the second direction Y. Specifically, the upper surface of the second horizontal plate 41 is located below the mounting surface 23a. The surface of the second connecting portion 42 that faces the second vertical reinforcement 15 is located on the opposite side of the mounting surface 23a to the opposing surface 24a in the second direction Y.

[0049] The first engaging portion 30 is located away from the intersection portion 21c when viewed from the first direction X. The first engaging portion 30 is located below the mounting surface 23a in the vertical direction Z, and on the opposite side of the connecting portion 22 to the connecting portion 24 in the second direction Y. Specifically, the upper surface of the first horizontal plate 31 is located below the mounting surface 23a. The surface of the first connecting portion 32 facing the first vertical reinforcement 13 is located on the opposite side of the mounting surface 23a to the opposing surface 24a in the second direction Y.

[0050] <Assembly method for rebar unit 10> This section describes a method for assembling a reinforcing bar unit 10 using an assembly jig 20. The following description details the step of connecting the second bar mesh 11b to the self-supporting first bar mesh 11a via a connecting bar 16. The assembly method for the reinforcing bar unit 10 includes a temporary connection step, a placement step, a connection step, and a removal step.

[0051] As shown in Figure 8, the temporary connection step is the process of connecting the second bar mesh 11b to the self-supporting first bar mesh 11a via the assembly jig 20. In the temporary connection process, the worker first positions the second bar mesh 11b such that the second transverse bar 14 extends in the same direction as the first transverse bar 12, and the second bar mesh 11b aligns with the first bar mesh 11a in the direction in which the first transverse bar 12 and the second transverse bar 14 extend.

[0052] The worker then inserts the first end vertical reinforcement 13a into the first groove 30a and the second end vertical reinforcement 15a into the second groove 40a. Next, the worker places the first upper transverse reinforcement 12a and the second upper transverse reinforcement 14a in the space below the groove 22a in the arrangement space 21a through the opening 21b. Next, the worker inserts the first upper transverse reinforcement 12a and the second upper transverse reinforcement 14a into the groove 22a of the connecting part 22 by lowering the assembly jig 20 downwards. As a result, the first upper transverse reinforcement 12a and the second upper transverse reinforcement 14a are connected via the connecting part 22, extending in the first direction X and aligned in the first direction X.

[0053] In the method described above, the first end vertical reinforcement 13a was inserted into the first groove 30a, and the second end vertical reinforcement 15a was inserted into the second groove 40a, after which the first upper transverse reinforcement 12a and the second upper transverse reinforcement 14a were inserted into the groove 22a of the connecting portion 22. However, the order may be reversed. That is, the worker may insert the first upper transverse reinforcement 12a and the second upper transverse reinforcement 14a into the groove 22a of the connecting portion 22, and then insert the first end vertical reinforcement 13a into the first groove 30a, and the second end vertical reinforcement 15a into the second groove 40a.

[0054] In this case, the worker inserts the first upper transverse bar 12a and the second upper transverse bar 14a into the groove 22a of the connecting portion 22 through the opening 21b, and then adjusts the position of the assembly jig 20 relative to the first bar mesh 11a in the first direction X. Specifically, the worker slides the assembly jig 20 relative to the first bar mesh 11a so that the position of the first groove 30a in the first direction X is the same as the position of the first end vertical bar 13a. Next, the worker adjusts the position of the second bar mesh 11b relative to the assembly jig 20 in the first direction X. Specifically, the worker slides the second bar mesh 11b relative to the assembly jig 20 so that the position of the second end vertical bar 15a in the first direction X is the same as the position of the second groove 40a. Finally, the worker rotates the assembly jig 20 using the first upper transverse reinforcement 12a and the second upper transverse reinforcement 14a as axes of rotation, thereby inserting the first end longitudinal reinforcement 13a into the first groove 30a and the second end longitudinal reinforcement 15a into the second groove 40a.

[0055] The worker may perform the temporary coupling process as follows: First, the worker attaches the assembly jig 20 to the first bar mesh 11a. Specifically, the worker inserts the first upper horizontal bar 12a into the groove 22a of the connecting part 22 through the opening 21b, and inserts the first end vertical bar 13a into the first groove 30a. This attaches the assembly jig 20 to the first bar mesh 11a.

[0056] Next, the worker attaches the second bar mesh 11b to the assembly jig 20 attached to the first bar mesh 11a. Specifically, the worker inserts the second upper horizontal bar 14a into the groove 22a of the connecting part 22 through the opening 21b, and inserts the second end vertical bar 15a into the second groove 40a. This attaches the second bar mesh 11b to the assembly jig 20.

[0057] As shown in Figure 9, the placement step is to place the joint reinforcement bar 16 along the first transverse reinforcement bar 12 and the second transverse reinforcement bar 14 connected by the connecting portion 22. In this embodiment, the worker inserts the joint reinforcement bar 16 into the placement space 21a through the opening 21b and places the joint reinforcement bar 16 on the mounting surface 23a of the support portion 23. As a result, the joint reinforcement bar 16 is supported along the first upper transverse reinforcement bar 12a and the second upper transverse reinforcement bar 14a. In this embodiment, the joint reinforcement bar 16 is placed below the first upper transverse reinforcement bar 12a and the second upper transverse reinforcement bar 14a.

[0058] The connection process involves connecting the first horizontal reinforcement 12, the first vertical reinforcement 13, and the connecting reinforcement 16, as well as connecting the second horizontal reinforcement 14, the second vertical reinforcement 15, and the connecting reinforcement 16, thereby connecting the first bar mesh 11a and the second bar mesh 11b via the connecting reinforcement 16.

[0059] In the joining process, the worker uses a binding member 17 to bind the first upper transverse reinforcement 12a, the first end longitudinal reinforcement 13a, and the joint reinforcement 16. The binding member 17 passes between the joint reinforcement 16 and the first engagement portion 30. More specifically, the binding member 17 passes between the joint reinforcement 16 and the first connection portion 32 in a plan view, and between the joint reinforcement 16 and the first transverse plate 31 in a front view.

[0060] The worker uses the binding member 17 to bind the second upper transverse reinforcement 14a, the second end vertical reinforcement 15a, and the joint reinforcement 16. The binding member 17 passes between the joint reinforcement 16 and the second engagement portion 40. More specifically, the binding member 17 passes between the joint reinforcement 16 and the second connection portion 42 in a plan view, and between the joint reinforcement 16 and the second transverse plate 41 in a front view.

[0061] The removal process involves removing the assembly jig 20 from the first bar mesh 11a and the second bar mesh 11b. As shown in Figure 10, during the removal process, the worker rotates the assembly jig 20 using the first upper transverse bar 12a and the second upper transverse bar 14a as pivot points. This moves the joint bar 16 out of the opening 21b and the placement space 21a. The first end vertical bar 13a moves out of the first groove 30a, and the second end vertical bar 15a moves out of the second groove 40a. The worker then moves the first upper transverse bar 12a and the second upper transverse bar 14a out of the opening 21b and the placement space 21a. This removes the assembly jig 20 from the first bar mesh 11a and the second bar mesh 11b.

[0062] Since the second bar mesh 11b is connected to the first bar mesh 11a via the connecting reinforcement 16 during the connection process, the second bar mesh 11b remains self-supporting even when the assembly jig 20 is removed during the removal process.

[0063] [Operation of this embodiment] The operation of this embodiment will now be explained. The assembly jig 20 used for assembling the reinforcing bar unit 10 comprises a main body 21, a first engaging portion 30, and a second engaging portion 40. The main body 21 extends in a first direction X. The main body 21 has a connecting portion 22 that connects the first transverse bar 12 and the second transverse bar 14 so that they extend in the first direction X and are aligned in the first direction X. The first engaging portion 30 clamps the first longitudinal bar 13 in the first direction X. The second engaging portion 40 clamps the second longitudinal bar 15 in the first direction X.

[0064] In this configuration, the first engaging portion 30 determines the position of the assembly jig 20 relative to the first bar mesh 11a in the first direction X. The second engaging portion 40 determines the position of the assembly jig 20 relative to the second bar mesh 11b in the first direction X. Therefore, the distance between the first bar mesh 11a and the second bar mesh 11b in the first direction X is determined.

[0065] As described above, the size of the first interval A1, which is the spacing between the first longitudinal bars 13, and the size of the second interval A2, which is the spacing between the second longitudinal bars 15, are the same. The size of the distance L, which is the distance between the first groove 30a and the second groove 40a in the first direction X, is the same as the size of the first interval A1. Therefore, the size of the third interval A3, which is the spacing between the first end longitudinal bar 13a and the second end longitudinal bar 15a, is the same as the size of the first interval A1. Consequently, the first longitudinal bars 13 and the second longitudinal bars 15 are arranged at equal intervals in the first direction X.

[0066] Furthermore, by connecting the second horizontal reinforcement bar 14 of the second bar mesh 11b to the first horizontal reinforcement bar 12 of the self-supporting first bar mesh 11a using the connecting portion 22, the second bar mesh 11b can be made self-supporting.

[0067] [Effects of this embodiment] The effects of this embodiment will now be explained. (1) The first engaging portion 30 of the assembly jig 20 determines the position of the assembly jig 20 relative to the first bar mesh 11a in the first direction X. The second engaging portion 40 determines the position of the assembly jig 20 relative to the second bar mesh 11b in the first direction X. Therefore, the distance between the first bar mesh 11a and the second bar mesh 11b in the first direction X is determined. In addition, the connecting portion 22 of the assembly jig 20 allows the second bar mesh 11b to stand on its own by connecting the second transverse bar 14 of the second bar mesh 11b to the first transverse bar 12 of the self-supporting first bar mesh 11a.

[0068] Therefore, workers do not need to measure the distance between the first bar mesh 11a and the second bar mesh 11b, or adjust the position of the second bar mesh 11b relative to the first bar mesh 11a, so that the distance between the first bar mesh 11a and the second bar mesh 11b is the predetermined distance. Furthermore, workers do not need to support the second bar mesh 11b while performing the connection work with the distance between the first bar mesh 11a and the second bar mesh 11b set to the predetermined distance. Consequently, the work efficiency of assembling the reinforcing bar unit 10 is improved.

[0069] (2) The main body 21 of the assembly jig 20 has a support portion 23 that supports the joint reinforcement 16 along the first transverse reinforcement 12 and the second transverse reinforcement 14 which are connected by the connecting portion 22. With this configuration, workers do not need to support the connecting reinforcement bars 16 along the first and second horizontal reinforcement bars 12 and 14 while performing the connection work. Therefore, the work efficiency of assembling the reinforcement bar unit 10 is improved.

[0070] (3) The connecting portion 22 sandwiches the first transverse bar 12 and the second transverse bar 14 in the second direction Y which is perpendicular to the first direction X. In this configuration, the first bar mesh 11a and the second bar mesh 11b are supported in the second direction Y by the connecting portion 22. Therefore, the first bar mesh 11a and the second bar mesh 11b can be made to stand stably on their own.

[0071] (4) The connecting portion 22 has a groove portion 22a that opens downward. The support portion 23 is located below the connecting portion 22. The main body portion 21 has a connecting portion 24 that connects the connecting portion 22 and the support portion 23. The connecting portion 24 is located in the region where the first longitudinal reinforcement bar 13 and the second longitudinal reinforcement bar 15 are arranged, which is one of two regions that sandwich the first transverse reinforcement bar 12 and the second transverse reinforcement bar 14 in the second direction Y. The main body portion 21 is partitioned by the connecting portion 22, the support portion 23, and the connecting portion 24, and has an arrangement space 21a in which the first transverse reinforcement bar 12, the second transverse reinforcement bar 14, and the joint reinforcement bar 16 are arranged. The main body portion 21 has an opening 21b that opens in the second direction Y so that the inside and outside of the arrangement space 21a are in communication with respect to the first transverse reinforcement bar 12 and the second transverse reinforcement bar 14 on the opposite side from the connecting portion 24.

[0072] With this configuration, the splice reinforcement 16 is positioned below the first transverse reinforcement 12 and the second transverse reinforcement 14. Compared to the case where the splice reinforcement 16 is positioned so as to be aligned with the first transverse reinforcement 12 and the second transverse reinforcement 14 in the second direction Y, the connection between the splice reinforcement 16 and the first transverse reinforcement 12 and the second transverse reinforcement 14 is more stable.

[0073] Furthermore, the first transverse reinforcement bars 12 and the second transverse reinforcement bars 14 can enter and exit the groove 22a through the opening 21b. Therefore, after connecting the second bar mesh 11b to the first bar mesh 11a via the connecting reinforcement bars 16, the assembly jig 20 can be removed from the reinforcement unit 10.

[0074] (5) The support portion 23 has a mounting surface 23a on which the joint reinforcement 16 is placed. The connecting portion 24 has an opposing surface 24a that faces the joint reinforcement 16. The first engaging portion 30 and the second engaging portion 40 are each provided at a position away from the intersection 21c where the mounting surface 23a and the opposing surface 24a intersect when viewed from the first direction X.

[0075] With this configuration, when tying the first horizontal reinforcement 12, the first vertical reinforcement 13, and the joint reinforcement 16 with the tying member 17, the tying member 17 can be passed between the joint reinforcement 16 and the first engaging portion 30, so the first engaging portion 30 is less likely to get in the way of the tying work. When tying the second horizontal reinforcement 14, the second vertical reinforcement 15, and the joint reinforcement 16 with the tying member 17, the tying member 17 can be passed between the joint reinforcement 16 and the second engaging portion 40, so the second engaging portion 40 is less likely to get in the way of the tying work.

[0076] (6) The assembly method of the reinforcing bar unit 10 includes a temporary connection step, an arrangement step, a connection step, and a removal step. The temporary connection step is the step of connecting the second bar mesh 11b to the self-supporting first bar mesh 11a via the assembly jig 20. The arrangement step is the step of arranging the splice bars 16 along the first transverse bars 12 and the second transverse bars 14 connected by the connection part 22. The connection step is the step of connecting the first transverse bars 12, the first longitudinal bars 13, and the splice bars 16, and connecting the second transverse bars 14, the second longitudinal bars 15, and the splice bars 16, thereby connecting the first bar mesh 11a and the second bar mesh 11b via the splice bars 16. The removal step is the step of removing the assembly jig 20 from the first bar mesh 11a and the second bar mesh 11b.

[0077] If the assembly jig 20 is not removed from the rebar unit 10, the assembly jig 20 is embedded inside the concrete section 110 together with the rebar unit 10. In this case, the concrete section 110 does not come into contact with the parts of the first bar mesh 11a and the second bar mesh 11b to which the assembly jig 20 is attached, thus reducing the integrity between the concrete section 110 and the rebar unit 10. In addition, since the assembly jig 20 is permanently embedded, it incurs costs.

[0078] In contrast, in this embodiment, after the second bar mesh 11b is connected to the first bar mesh 11a via the connecting reinforcement 16, the assembly jig 20 is removed from the reinforcing bar unit 10. This allows the concrete section 110 and the reinforcing bar unit 10 to come into contact, thereby improving the integrity between the concrete section 110 and the reinforcing bar unit 10. Furthermore, since the assembly jig 20 can be reused, costs can be reduced.

[0079] (7) If the assembly jig 20 is not used, three workers are required to assemble the rebar unit 10. The first worker supports the second bar mesh 11b while maintaining the predetermined distance between the first bar mesh 11a and the second bar mesh 11b. The second worker supports the splice bars 16 along the first transverse bars 12 and the second transverse bars 14. The third worker connects the second bar mesh 11b to the first bar mesh 11a via the splice bars 16, with the first worker supporting the second bar mesh 11b and the second worker supporting the splice bars 16.

[0080] In contrast, when assembling the reinforcing bar unit 10 using the assembly jig 20, workers to support the second bar mesh 11b and workers to support the joint reinforcement bars 16 are not required. Therefore, the assembly of the reinforcing bar unit 10 can be performed by only one worker.

[0081] (8) The first engaging portion 30 is located in the second direction Y on the opposite side of the connecting portion 22 from the connecting portion 24. With this configuration, the joint reinforcement 16 does not overlap with the first engaging portion 30 in the vertical direction Z, making it easier to tie the joint. The second engaging portion 40 is located in the second direction Y on the opposite side of the connecting portion 22 from the connecting portion 24. With this configuration, the joint reinforcement 16 does not overlap with the second engaging portion 40 in the vertical direction Z, making it easier to tie the joint.

[0082] <Example of changes> The above embodiment is an example of possible forms of the assembly jig 20 for the reinforcing bar unit 10 and the assembly method for the reinforcing bar unit 10, and is not intended to limit their form. The assembly jig 20 for the reinforcing bar unit 10 and the assembly method for the reinforcing bar unit 10 may take forms different from those exemplified in the above embodiment. Examples of such forms include forms in which some of the configurations of the embodiment are replaced, modified, or omitted, or forms in which new configurations are added to the embodiment. Examples of modifications to the embodiment are shown below.

[0083] The first bar mesh 11a may have three or more first transverse bars 12. The second bar mesh 11b may have three or more second transverse bars 14. The main body 21 does not necessarily have to have a support portion 23. Even in this case, at least the effect (1) of the above embodiment can be obtained.

[0084] The connecting portion 22 may be configured to sandwich the first transverse bar 12 and the second transverse bar 14 in the vertical direction Z. In this case, the support portion 23 supports the joint bar 16 so that it is aligned with the first transverse bar 12 and the second transverse bar 14 in the second direction Y.

[0085] The connecting portion 22 does not have to be arc-shaped when viewed from the first direction X. The connecting portion 22 may, for example, have two first plate portions that extend in the vertical direction Z and are spaced apart in the second direction Y, and a second plate portion that connects the upper ends of the two first plate portions. In this case, the groove portion 22a is partitioned by the two first plate portions and the second plate portion.

[0086] The first engaging portion 30 may have only one of the two first horizontal plates 31 and the two first vertical plates 33. Even in this case, the first engaging portion 30 can clamp the first vertical reinforcement bar 13 in the first direction X.

[0087] The second engaging portion 40 may have only one of the two second horizontal plates 41 and the two second vertical plates 43. Even in this case, the second engaging portion 40 can clamp the second vertical reinforcement bar 15 in the first direction X.

[0088] The position of the first engaging portion 30 relative to the main body 21 may be changed as appropriate. The position of the second engaging portion 40 relative to the main body 21 may also be changed as appropriate. For example, the first engaging portion 30 and the second engaging portion 40 may be located lower than the first engaging portion 30 and the second engaging portion 40 in the above embodiment. In this case, the gap between the joint reinforcing bar 16 and the first engaging portion 30, and the gap between the joint reinforcing bar 16 and the second engaging portion 40 become larger, making it easier to perform the binding work.

[0089] <Note> This specification discloses the following technologies: [Note 1] An assembly jig for a reinforcing bar unit used in the assembly work of a reinforcing bar unit, comprising: a first bar mesh in which a plurality of first transverse bars and a plurality of first longitudinal bars intersect; and a second bar mesh in which a plurality of second transverse bars and a plurality of second longitudinal bars intersect, wherein the first transverse bars and the second transverse bars extend in the same direction, and the first bar mesh and the second bar mesh are connected via splice bars in the direction in which the first transverse bars and the second transverse bars extend, comprising: a main body extending in a first direction; a first engaging portion for clamping the first longitudinal bars in the first direction; and a second engaging portion for clamping the second longitudinal bars in the first direction, wherein the main body has a connecting portion for connecting the first transverse bars and the second transverse bars so that the first transverse bars and the second transverse bars extend in the first direction and are aligned in the first direction.

[0090] [Note 2] In the assembly jig for the reinforcing bar unit described in Appendix 1, the main body further has a support portion that supports the joint reinforcing bars along the first and second transverse reinforcing bars connected by the connecting portion.

[0091] [Note 3] In the assembly jig for the reinforcing bar unit described in Appendix 2, the connecting portion sandwiches the first transverse bar and the second transverse bar in a second direction perpendicular to the first direction.

[0092] [Note 4] In the assembly jig for the reinforcing bar unit described in Appendix 3, the connecting portion has a groove that opens downward, the support portion is located below the connecting portion, and the main body has a connecting portion that connects the connecting portion and the support portion, and is located in the region where the first and second longitudinal reinforcing bars are arranged, among two regions that sandwich the first and second transverse reinforcing bars in the second direction, an arrangement space partitioned by the connecting portion, the support portion, and the connecting portion, in which the first transverse reinforcing bars, the second transverse reinforcing bars, and the joint reinforcing bars are arranged, and an opening that opens in the second direction on the side opposite to the connecting portion so that the inside and outside of the arrangement space are in communication with respect to the first and second transverse reinforcing bars.

[0093] [Note 5] In the assembly jig for the reinforcing bar unit described in Appendix 4, the support portion has a mounting surface on which the joint reinforcing bar is placed, the connecting portion has an opposing surface facing the joint reinforcing bar, and the first engaging portion and the second engaging portion are each provided at a position away from the intersection where the mounting surface and the opposing surface intersect when viewed from the first direction.

[0094] [Note 6] A method for assembling a reinforcing bar unit, comprising a first bar mesh in which a plurality of first transverse bars and a plurality of first longitudinal bars intersect, and a second bar mesh in which a plurality of second transverse bars and a plurality of second longitudinal bars intersect, wherein the first transverse bars and the second transverse bars extend in the same direction, and the first bar mesh and the second bar mesh are connected via splice bars in the direction in which the first transverse bars and the second transverse bars extend, using an assembly jig for a reinforcing bar unit described in any one of appendices 1 to 5, wherein the assembly of the reinforcing bar unit is performed with respect to the self-supporting first bar mesh, A method for assembling a reinforcing bar unit, comprising: a temporary connection step of connecting the second bar mesh via a vertical jig; an arrangement step of arranging the connecting bars along the first transverse bars and the second transverse bars connected by the connection part; a connection step of connecting the first transverse bars, the first longitudinal bars, and the connecting bars, and connecting the second transverse bars, the second longitudinal bars, and the connecting bars to connect the first bar mesh and the second bar mesh via the connecting bars; and a step of removing the assembly jig from the first bar mesh and the second bar mesh. [Explanation of Symbols]

[0095] 10...Reinforcement bar unit, 11a...First bar mesh, 11b...Second bar mesh, 12...First transverse reinforcement, 13...First longitudinal reinforcement, 14...Second transverse reinforcement, 15...Second longitudinal reinforcement, 16...Joint reinforcement, 20...Assembly jig, 21...Main body, 21a...Placement space, 21b...Opening, 21c...Intersection, 22...Connecting part, 22a...Groove, 23...Support part, 23a...Placement surface, 24...Connection part, 24a...Opposite surfaces, 30...First engagement part, 40...Second engagement part, X...First direction, Y...Second direction.

Claims

1. An assembly jig for a reinforcing bar unit used in the assembly work of a reinforcing bar unit, comprising a first bar mesh where a plurality of first transverse bars and a plurality of first longitudinal bars intersect, and a second bar mesh where a plurality of second transverse bars and a plurality of second longitudinal bars intersect, wherein the first transverse bars and the second transverse bars extend in the same direction, and the first bar mesh and the second bar mesh are connected via splice bars in the direction in which the first transverse bars and the second transverse bars extend, A main body extending in the first direction, A first engaging portion that clamps the first longitudinal reinforcement in the first direction, A second engaging portion that clamps the second longitudinal reinforcement in the first direction, Equipped with, The main body portion has a connecting portion that connects the first transverse bar and the second transverse bar such that the first transverse bar and the second transverse bar extend in the first direction and are aligned in the first direction. Assembly jig for rebar units.

2. The main body further has a support portion that supports the joint reinforcement along the first and second transverse reinforcements connected by the connecting portion. Assembly jig for a reinforcing bar unit as described in claim 1.

3. The connecting portion sandwiches the first transverse bar and the second transverse bar in a second direction perpendicular to the first direction. The assembly jig for the reinforcing bar unit according to claim 2.

4. The connecting portion has a groove that opens downwards, The support portion is located below the connecting portion, The main body is, A connecting portion that connects the connecting portion and the support portion, and which is located in the region where the first vertical reinforcement and the second vertical reinforcement are arranged, among the two regions that sandwich the first horizontal reinforcement and the second horizontal reinforcement in the second direction, The arrangement space is defined by the connecting portion, the support portion, and the connecting portion, and the first transverse reinforcement, the second transverse reinforcement, and the joint reinforcement are arranged therein. In the second direction, an opening is provided that allows communication between the inside and outside of the arrangement space on the opposite side of the connection portion to the first and second transverse reinforcements, Having The assembly jig for the reinforcing bar unit according to claim 3.

5. The support portion has a mounting surface on which the joint reinforcement is placed, The connecting portion has an opposing surface that faces the joint reinforcement, The first engaging portion and the second engaging portion are each provided at a position away from the intersection where the aforementioned mounting surface and the opposing surface intersect, when viewed from the first direction. The assembly jig for the reinforcing bar unit according to claim 4.

6. A method for assembling a reinforcing bar unit, comprising a first bar mesh where a plurality of first transverse bars and a plurality of first longitudinal bars intersect, and a second bar mesh where a plurality of second transverse bars and a plurality of second longitudinal bars intersect, wherein the first transverse bars and the second transverse bars extend in the same direction, and the first bar mesh and the second bar mesh are connected via splice bars in the direction in which the first transverse bars and the second transverse bars extend, using an assembly jig for a reinforcing bar unit according to any one of claims 1 to 5, A temporary connection step involves connecting the second bar mesh to the first bar mesh, which is freestanding, via the assembly jig. Arrangement step of arranging the connecting reinforcement along the first and second transverse reinforcements connected by the connecting portion, A connecting step in which the first bar mesh and the second bar mesh are connected via the connecting bars by connecting the first transverse bar, the first longitudinal bar, and the connecting bar, and connecting the second transverse bar, the second longitudinal bar, and the connecting bar, The steps include removing the assembly jig from the first bar mesh and the second bar mesh, including, How to assemble a rebar unit.

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