Pre-assembled rebar assembly device and assembly method

Abstract

To reduce labor for assembling pre-assembled re-bars.SOLUTION: An assembly device 1A assembles pre-assembled re-bars 2 that include main re-bars 10 consisting of upper end re-bars 11, middle hanging re-bars 12, and lower end re-bars 13, and shear re-bars 20 surrounding the main re-bars 10. The assembly device 1A includes an alignment rack 30 on which the shear re-bars 20 are arranged in upright state, a main rebar feeding table 40 that is positioned in series with the alignment rack 30 and has feeding rollers 43 including drive feeding rollers 43d, and feeds main re-bars 10 toward the inside of the shear re-bars 20, multiple main rebar feeding tables 50 that are positioned along the alignment rack 30 and carry and feed main re-bars 10 fed from the main rebar feeding table 40, a stopper stand 60 that has a stop plate 63C that abuts the tips of the main re-bars 10 fed by the main rebar feeding tables 50, a main stand 70 that supports the upper end re-bars 11 inserted into the shear re-bars 20 in a spanning state so that they can be lifted and lowered, and a sub-stand 80 that supports the middle hanging re-bars 12 inserted into the shear re-bars 20 in a spanning state so that they can be lifted and lowered.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an assembly device and an assembly method for pre-assembling reinforcing bars that constitute columns, beams, etc. of a reinforced concrete structure. [Background technology]

[0002] In the construction of reinforced concrete structures, the rebar that makes up the columns and beams is pre-assembled in a factory or workshop, a method known as pre-assembly, which shortens construction time and stabilizes quality.

[0003] Patent Document 1 below discloses a jig for arranging main reinforcement bars in a spanning state at predetermined positions in order to form pre-assembled rebars for precast beams. This jig has two formworks that support the main reinforcement bars at both ends and two support bases that support the main reinforcement bars at their middles. In each formwork, a girder plate with its plate surface facing the longitudinal direction of the main reinforcement is fixed to two columns, and the girder plate is provided with multiple semi-cylindrical engaging bases on which the ends of the main reinforcement are placed. In each support base, multiple rod-shaped bodies for placing the main reinforcement bars are axially supported by the two columns and arranged vertically.

[0004] When using the above jig, both ends of the main reinforcement are placed on the engaging bases of the girder plate of the end formwork in accordance with the positioning of the main reinforcement in the pre-assembled reinforcing bars, and the middle part of the main reinforcement is placed on the rod-shaped body of the receiving base part. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-42151 Summary of the Invention [Problem to be solved by the invention]

[0006] With the jig in Patent Document 1, tasks such as placing the main reinforcing bars on the formwork and support base were done manually, which resulted in low productivity in assembling pre-assembled reinforcing bars. Therefore, reducing the labor required for assembling pre-assembled reinforcing bars was an issue. [Means for solving the problem]

[0007] To solve the above problems, a pre-assembled reinforcing bar assembling device according to one aspect of the present invention is provided. A device for assembling pre-assembled reinforcing bars having a plurality of main reinforcements and a plurality of frame-shaped shear reinforcements surrounding the main reinforcements, wherein the plurality of main reinforcements include a plurality of first main reinforcements arranged inside the upper edge portions of the upright shear reinforcements and a plurality of second main reinforcements arranged within the shear reinforcements other than the inside of the upper edge portions, A) An alignment rack having an elongated shape in a plan view, on which a plurality of the shear reinforcements are arranged at predetermined intervals in an upright state; a) a main reinforcement supply table that is arranged on one side of the aligning rack in the longitudinal direction and supplies the main reinforcement toward the shear reinforcement arranged side by side on the aligning rack, and has a plurality of rotatable supply rollers extending in the short direction of the aligning rack in the longitudinal direction, the supply rollers carrying the main reinforcement and including a drive supply roller that is driven by power transmitted from a power source; (c) a plurality of main reinforcement feed tables arranged along the alignment rack, each of which has a rotatable feed roller extending in a direction intersecting the alignment rack, and which feeds the main reinforcement fed from the main reinforcement feed table and inserted into the shear reinforcement arranged side by side on the alignment rack; d) a stopper stand arranged on the other side of the alignment rack in the longitudinal direction thereof and having an abutment plate with its plate surface facing the one side, the abutment plate abutting against the tip of the main reinforcement fed by the main reinforcement feed table; E) A first main reinforcement transporting means for supporting the first main reinforcement inserted into the shear reinforcement so that it can be raised and lowered, the first main reinforcement transporting means being a plurality of main stands arranged along the alignment rack, each of which has a first bar that can be raised and lowered and extends in a direction intersecting the alignment rack, and the first bars of the plurality of main stands support and lift the first main reinforcement inserted into the shear reinforcement in a spanning state, so that the shear reinforcement lifted via the first main reinforcement can be removed from the alignment rack; and F) a second main reinforcement conveying means for supporting the second main reinforcement inserted into the shear reinforcement so that it can be raised and lowered; It is characterized by having the following.

[0008] According to the above configuration, the main reinforcement bars supplied by the drive supply rollers from the main reinforcement supply table are inserted into the shear reinforcement bars arranged on the alignment rack, placed on the feed rollers of the main reinforcement feed table, and fed toward the stopper stand. The main reinforcement bars are positioned in the longitudinal direction by being abutted against the abutment plate of the stopper stand. The first main reinforcement of the main reinforcement is lifted up to the inside of the upper edge of the shear reinforcement by the first bar of the multiple main frames, which are the first main reinforcement transporting means, so that it can be placed in the specified position. The second main reinforcement is carried to the placement height within the shear reinforcement by the second main reinforcement transporting means, so that it can be placed in the specified position. Once the shear reinforcement is lifted up via the first main reinforcement by the first bar and removed from the alignment rack, the second main reinforcement can be carried to the placement height of the lower part of the shear reinforcement. Not only are the main reinforcement bars transported to the placement height within the shear reinforcement bars by the first main reinforcement conveying means and the second main reinforcement conveying means, but the main reinforcement bars to be inserted into the shear reinforcement bars are supplied from the main reinforcement supply table by driven supply rollers, thereby reducing the labor required to assemble pre-assembled rebars and ultimately improving the productivity of pre-assembled rebar assembly.

[0009] Preferably, the second main reinforcement bar transporting means is a plurality of sub-frames arranged along the alignment rack, each sub-rack has a second bar that can be raised and lowered and extends in a direction intersecting the alignment rack; The second bars of the plurality of sub-frames support the second main reinforcements inserted into the shear reinforcement bars in a spanning state and carry them up to the arrangement height within the shear reinforcement bars. According to the above configuration, by using a sub-mounting having the same configuration as the main mount of the first main reinforcement transporting means as the second main reinforcement transporting means, it is possible to use a common transporting means for the first and second main reinforcement, thereby reducing the procurement costs of the transporting means.

[0010] Preferably, the assembly device further includes a pair of scaffolding boards provided on both sides of the aligning rack in the short direction, and a scaffolding board lift that supports and elevates each scaffolding board, The main reinforcement slide is spanned across the pair of scaffolding boards, The scaffolding plank lift, the scaffolding plank, and the main reinforcement slide are provided as the second main reinforcement conveying means, As the scaffolding board lift rises and falls, the feed rollers of the main reinforcement feed table support the second main reinforcement inserted into the shear reinforcement in a spanning state and carry it to the placement height within the shear reinforcement. With the above configuration, even for pre-assembled rebars with large beam depth, column depth, and column width, work can be performed near the upper edge of the shear reinforcement by raising the scaffolding board. In addition, by hanging the main reinforcement slide on the scaffolding board and raising and lowering it with a scaffolding lift, it can also be used as part of the second main reinforcement transport means.

[0011] Preferably, the assembly device further includes a main reinforcing bar supply table lift that supports and raises and lowers the main reinforcing bar supply table. According to the above configuration, the main reinforcement can be supplied from the arrangement height of the main reinforcement by raising and lowering the main reinforcement supply table. This allows the process of supplying the main reinforcement into the shear reinforcement and the process of transporting the main reinforcement to the arrangement height within the shear reinforcement, which are necessary when the main reinforcement supply table is not raised and lowered, to be performed in a single process. This ultimately improves the workability of assembling pre-assembled rebars.

[0012] Preferably, the abutment plate of the stopper stand is movable in the longitudinal and lateral directions of the alignment rack. According to the above configuration, the abutment plate can be moved in the longitudinal direction of the aligning rack, which allows it to accommodate pre-assembled rebars of various lengths. Also, the ability to move it in the transverse direction makes it possible to attach joints to the ends of the main rebars and to move the assembled pre-assembled rebars in the longitudinal direction and remove them from the assembly device.

[0013] Preferably, the feed rollers of the main reinforcing bar feed table include drive feed rollers that are driven by power transmitted from a power source. According to the above configuration, the main reinforcement bars inserted into the shear reinforcement bars are placed on power-driven drive feed rollers and fed, thereby further reducing the labor required to assemble the pre-assembled reinforcing bars.

[0014] Another aspect of the present invention is a method for assembling a pre-assembled reinforcing bar having a plurality of main reinforcements and a plurality of frame-shaped shear reinforcements surrounding the main reinforcements, an aligning step of arranging the plurality of shear reinforcements in an upright state at predetermined intervals; an insertion step of supplying and inserting a plurality of the main reinforcements into the arranged shear reinforcement bars by power; a main reinforcement feeding step of feeding the main reinforcement inserted into the shear reinforcement to a predetermined position; A reinforcement arrangement process in which the main reinforcement inserted to a predetermined position in the shear reinforcement is transported by a transport means to an arrangement height in the shear reinforcement and arranged at a predetermined position; It is characterized by having the following. According to the above configuration, not only are the main reinforcement bars transported to the placement height within the shear reinforcement bars by the transporting means, but the main reinforcement bars to be inserted into the shear reinforcement bars are supplied by power, thereby reducing the labor required to assemble pre-assembled rebars and ultimately improving the productivity of assembling pre-assembled rebars.

[0015] Preferably, the plurality of main reinforcements include a plurality of first main reinforcements arranged inside the upper edge portions of the shear reinforcement bars arranged side by side at predetermined intervals in an upright state, and a plurality of second main reinforcements arranged in the shear reinforcement bars other than the inside of the upper edge portions, The insertion process includes a first main reinforcement insertion process in which the main reinforcement is the first main reinforcement, and a second main reinforcement insertion process, which is carried out after the first main reinforcement insertion process, in which the main reinforcement is the second main reinforcement, The reinforcement arrangement process includes a first main reinforcement arrangement process in which the main reinforcement is the first main reinforcement, and a second main reinforcement arrangement process, which is carried out after the first main reinforcement arrangement process, in which the main reinforcement is the second main reinforcement, In this second main reinforcement arrangement process, a horizontal core reinforcement arrangement process is carried out in which a horizontal core reinforcement having a horizontal portion extending horizontally is arranged in a bridging state between the two second main reinforcements arranged at the same height. According to the above configuration, by arranging horizontal core bars in the second main bars, it is possible to increase the shear strength of reinforced concrete in which concrete is poured into the assembled pre-assembled reinforcing bars.

[0016] Preferably, the assembly method further includes a vertical tangential reinforcement installation step of installing a vertical tangential reinforcement having a vertical portion extending vertically to the first main reinforcement arranged inside the upper edge portion of the shear reinforcement, and a vertical tangential reinforcement installation step of hooking one of the bent portions provided at both ends of the vertical portion of the vertical tangential reinforcement onto the first main reinforcement. According to the above configuration, the shear strength of reinforced concrete in which concrete is poured into pre-assembled reinforcing bars can be further increased.

[0017] Preferably, the main reinforcement feeding step feeds the main reinforcement by power. According to the above configuration, the assembly of the pre-assembled reinforcing bars is more labor-saving. [Effects of the Invention]

[0018] According to the present invention, the labor required for assembling pre-assembled reinforcing bars can be reduced. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a plan view of a pre-assembled reinforcing bar assembly device according to a first embodiment of the present invention. [Figure 2] FIG. [Figure 3]FIG. 3 is a view taken along line III-III in FIG. 2, enlarged approximately 3.5 times. [Figure 4] FIG. 2 is a plan view of the main parts of the assembly device, enlarged approximately twice the size and omitting the scaffolding. [Figure 5] FIG. 5 is a plan view of the alignment rack of the assembly device, enlarged at the same magnification as FIG. 4 (approximately 2 times). [Figure 6] FIG. 5 is a front view of the same aligning rack, enlarged at the same magnification (approximately 2 times) as in FIGS. 4 and 5. [Figure 7] FIG. 4 is a side view of the same aligning rack, enlarged at the same magnification as FIG. 3 (approximately 3.5 times). [Figure 8] FIG. 4 is a side view of the main stand of the assembly device, enlarged at the same magnification as FIG. 3 (approximately 3.5 times). [Figure 9] 9A and 9B are enlarged views of the main gantry at the same magnification as FIG. 8 (approximately 3.5 times), where (A) is a view taken along line 9A-9A in FIG. 8, and (B) is a view taken along line BB in FIG. 9A. [Figure 10] 3A, 3B, and 3C are enlarged views of the main reinforcement feed table of the assembly device at the same magnification (approximately 3.5 times) as in FIG. 3, where (A) is a plan view, (B) is a side view, and (C) is a front view. [Figure 11] 5A and 5B are plan views showing the components of the stopper stand of the assembly device enlarged at the same magnification (approximately 2 times) as in FIG. 4, where (A) is a view of the base part, (B) is a view of the first table, and (C) is a view of the second table. [Figure 12] 11. This is a plan view of the components of the stopper stand enlarged at the same magnification (approximately 2 times) as in FIG. 11, where (A) is a view of the base part and the first table assembled together, and (B) is a view of the first table and the second table assembled together. [Figure 13] 13A and 13B are schematic diagrams showing a method for assembling pre-assembled rebars using the same assembly device, in which (A) is a front view of the state in which all lifting sections of the main frame and sub-frame are positioned at the lowest position, and (B) is a view taken along arrow B in FIG. 13A. [Figure 14] 14(A) is a front view of the shear reinforcement bars arranged on the aligning rack, and FIG. 14(B) is a view taken along the arrow B in FIG. 14(A). [Figure 15] 15A and 15B are schematic diagrams showing the assembly method, in which (A) is a front view of the state in which the upper end reinforcement (first main reinforcement) is inserted into the shear reinforcement, and (B) is a view taken along the arrow B in FIG. 15A. [Figure 16] 16A and 16B are schematic diagrams showing the assembly method, in which (A) is a front view of the state in which the lifting part of the main frame has been raised to bring the upper end reinforcement close to the upper edge of the shear reinforcement, and (B) is a view taken from the arrow B in Figure 16A. [Figure 17] 16(B) is a schematic diagram showing the assembly method, in which (A) shows the state in which the upper end reinforcement has been carried up to the upper edge of the shear reinforcement and the middle hanging reinforcement (second main reinforcement) arranged above the shear reinforcement has been inserted into the shear reinforcement, and (B) shows the state in which the lifting section of the sub-frame has been raised to carry the middle hanging reinforcement to the highest placement height and arranged. [Figure 18] Schematic diagrams showing the assembly method, where (A) shows the state in which core bars have been placed in the central hanging bars that are placed at the top, and (B) shows the state in which the central hanging bars have been placed in order from the top by lowering the lifting part of the sub-frame, and core bars have been placed in the central hanging bars. [Figure 19] Schematic diagrams showing the assembly method, where (A) shows the state in which the shear reinforcement is lifted by raising the lifting section of the main frame, the lifting section of the secondary frame is positioned at the lowest, and the central hanging bars that are arranged at the bottom of the shear reinforcement are inserted into the shear reinforcement, and (B) shows the state in which the lifting section of the secondary frame is raised and then lowered, the central hanging bars are arranged from top to bottom, and core bars are arranged in the central hanging bars. [Figure 20] These are schematic diagrams showing the assembly method, where (A) shows the state in which all the central hanging bars are arranged on the left and right side edges of the shear reinforcement and the core bars are arranged on the central hanging bars, and (B) shows the state in which the bent part of the core bar is hooked onto the upper end bar. [Figure 21] Schematic diagrams showing the assembly method, where (A) shows the state in which the bent part of the core reinforcement is hooked onto the upper end reinforcement other than both ends on the inside of the upper edge of the shear reinforcement, and (B) shows the state in which the lower end reinforcement (second main reinforcement) is inserted into the inside of the lower edge of the shear reinforcement. [Figure 22]22(A) is a schematic diagram showing the assembly method, in which (A) is a front view of the state in which the lifting section of the main frame is further raised to further lift the shear reinforcement, the bottom reinforcement is arranged, and the assembly of the pre-assembled rebar is completed, and (B) is a view taken along arrow B in FIG. 22(A). [Figure 23] FIG. 10 is a plan view of a pre-assembled reinforcing bar assembly device according to a second embodiment of the present invention. [Figure 24] FIG. 10 is a front view of the assembly device, showing the state in which the scaffold lift and the main reinforcing bar supply table lift are lowered. [Figure 25] FIG. 10 is a front view of the assembly device, showing the state in which the scaffolding lift and the main reinforcing bar supply table lift are raised. [Figure 26] (A) is a view taken along arrow 26A in Figure 24, enlarged approximately twice; (B) is a view taken along arrow 26B in Figure 25, enlarged approximately twice; [Figure 27] 26. FIG. 27 is a plan view of the main part of the assembly device, enlarged at the same magnification (approximately 2 times) as in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings in the order of "pre-assembled rebars," "assembling device for pre-assembled rebars," "assembling method for pre-assembled rebars," and "effects of the first embodiment."

[0021] [Pre-assembled rebar] As shown in Fig. 22, the pre-assembled reinforcing bars 2 assembled by the assembly device 1A (Fig. 1) have a plurality of main reinforcements 10 and a plurality of shear reinforcement bars 20 surrounding these main reinforcements 10. The shear reinforcement bars 20 are formed in a frame-like quadrilateral shape and have an upper edge portion 20a, left and right side edge portions 20b, 20c, and a lower piece portion 20d, and are arranged at predetermined intervals in the longitudinal direction of the main reinforcement bars 10.

[0022] The main reinforcement 10 includes upper end reinforcement 11, middle hanging reinforcement 12, and lower end reinforcement 13, each of which is tied to the shear reinforcement 20 by metal wire or the like. As shown in FIG. 22(B), a plurality of upper end reinforcements 11 are arranged at equal intervals inside the upper side portion 20a of the shear reinforcement 20, and 14 reinforcements are arranged in this embodiment.

[0023] The central hanging reinforcement bars 12 are arranged along the inside of the left and right side edge portions 20b, 20c of the shear reinforcement bar 20 at predetermined intervals downward from the upper end reinforcement bars 11 at both widthwise ends inside the upper edge portion 20a of the shear reinforcement bar 20. In this embodiment, twelve central hanging reinforcement bars 12 are arranged on each of the side edge portions 20b, 20c.

[0024] The bottom end reinforcements 13 are arranged at equal intervals inside the lower edge portion 20d of the shear reinforcement 20, and 14 of them are arranged in this embodiment. In this description, the upper end reinforcement 11, which is the main reinforcement 10 arranged inside the upper edge portion 20a of the shear reinforcement 20, is referred to as the first main reinforcement, and the middle hanging reinforcement 12 and lower end reinforcement 13, which are the main reinforcement 10 arranged within the shear reinforcement 20 other than the inside of the upper edge portion 20a (side edge portions 20b, 20c and lower edge portion), are referred to as the second main reinforcement.

[0025] As shown in Figure 22 (B), the pre-assembled reinforcing bars 2 may be provided with core bars 14 (horizontal core bars) that connect the central hanging bars 12, 12 that face each other in the left-right direction at the same reinforcing height, and core bars 15 (vertical core bars) that connect the upper end bars 11 and lower end bars 13 that face each other in the up-down direction.

[0026] The core reinforcement 14 connects the central hanging reinforcements 12, 12 that are arranged at the same height on the left and right side edges 20b, 20c of the shear reinforcement 20. In this embodiment, the left side of FIG. 22(A) is the rear side, and the core reinforcement 14 is arranged adjacent to the odd-numbered shear reinforcement reinforcements 20 from the rear side. As shown in FIG. 18(A), the core reinforcement 14 has a horizontal portion 14a that extends horizontally and bent portions 14b, 14b provided on both ends of the horizontal portion 14a. The bent portions 14b, 14b are hooked onto the central hanging reinforcements 12, 12, respectively, and tied together with metal wire or the like.

[0027] As shown in FIG. 22(B), the core reinforcement 15 connects the upper end reinforcement 11 arranged at all but the two ends inside the upper edge portion 20a of the shear reinforcement 20 to the lower end reinforcement 13 arranged directly below the upper end reinforcement 11 and inside the lower edge portion 20d. In this embodiment, the left side of FIG. 22(A) is the rear side, and the core reinforcement 15 is arranged adjacent to the even-numbered shear reinforcement 20 from the rear side. As shown in FIG. 22(B), the core reinforcement 15 has a vertical portion 15a extending vertically and bent portions 15b, 15b provided at both ends of the vertical portion 15a. The bent portions 15b, 15b are hooked onto the upper end reinforcement 11 and the lower end reinforcement 13, respectively, and are tied together with a metal wire or the like.

[0028] By arranging the core bars 14, 15, the shear strength of reinforced concrete, which is formed by pouring concrete into the pre-assembled rebars 2, is increased. Only one of the core bars 14, 15 may be arranged, or neither may be arranged. Furthermore, the core bars 14, 15 may be arranged in any position different from that in this embodiment.

[0029] [Pre-assembled rebar assembly device] The assembly device 1A for assembling the above-mentioned pre-assembled reinforcing bars 2 can have an alignment rack 30, a main reinforcing bar supply table 40, a main reinforcing bar feed table 50, a stopper stand 60, a plurality of main stands 70 (first main reinforcing bar transporting means), a plurality of sub-stands 80 (second main reinforcing bar transporting means), and scaffolding 90, as shown in Figures 1 and 2.

[0030] (alignment rack) As shown in Fig. 14(A), the aligning rack 30 is used to arrange the shear reinforcement bars 20 in an upright state at predetermined intervals during the assembly process of the pre-assembled rebars 2, and has an elongated shape in plan view as shown in Figs. 4 and 5. As shown in Figs. 3 to 6, the aligning rack 30 is placed on a plurality of bases 3 (eight in this embodiment) that are rectangular in plan view and extend in the short direction of the aligning rack 30. The eight bases 3 are arranged at intervals in the longitudinal direction of the aligning rack 30.

[0031] The aligning rack 30 has a pair of lower side frames 31, 31 extending in the longitudinal direction thereof. The lower side frames 31, 31 are fixed to span across a plurality of bases 3. As shown in Figures 3 and 5, a plurality of rails 32 are fixed to span across the pair of lower side frames 31, 31. In this embodiment, five rails 32 are provided, and are arranged at intervals in the longitudinal direction of the aligning rack 30.

[0032] Two lower support plates 33 extending in the longitudinal direction of the alignment rack 30 are provided in a spanning state at the longitudinal center of the five rails 32. As shown in FIG. 3, the lower support plates 33 support the lower edge portions 20d of the shear reinforcement bars 20 and are made of L-shaped steel. The lower support plates 33, 33 have their corners facing outward and upward. As shown in FIG. 5, the vertical wall of each lower support plate 33 is formed with engagement grooves 33a for receiving the lower edge portions 20d of the shear reinforcement bars 20, and multiple engagement grooves 33a are arranged at predetermined intervals in the longitudinal direction of the lower support plate 33. In adjacent lower support plates 33, 33, the engagement grooves 33a are formed at the same position in the longitudinal direction.

[0033] As shown in FIGS. 3 and 5, two guide blocks 34, 34 are slidably attached to each rail 32 on both ends of the two lower support plates 33, 33 so as to surround the rail 32.

[0034] A bottom support plate 35 is provided on the upper surface of each guide block 34 at a position toward the center of the rail 32, extending in the longitudinal direction of the aligning rack 30 and supporting the bottom edge 20d of the shear reinforcement 20. Each bottom support plate 35 is made of steel with an L-shaped cross section, with its corners facing outward and upward, and is bridged across five guide blocks 34 in the longitudinal direction of the aligning rack 30. As shown in Figures 3 and 5, a plurality of engagement grooves 35a for receiving the bottom edge 20d of the shear reinforcement 20 are formed in the vertical wall of each bottom support plate 35, and are located at the same position in the longitudinal direction of the aligning rack 30 as the engagement grooves 33a of the bottom support plate 33.

[0035] A support column 36 is provided on the upper surface of each guide block 34 at a position closer to the end of the rail 32. Therefore, the two support columns 36, 36 face each other in the longitudinal direction of each rail 32. A pair of side support plates 37, 37 extending in the longitudinal direction of the alignment rack 30 and supporting the side edges 20b, 20c of the shear reinforcement bars 20 are provided at the upper ends of the opposing surfaces of the support columns 36, 36.

[0036] As shown in Fig. 3, each side support plate 37 is made of steel material with an L-shaped cross section, with its corners facing inward and downward, and its vertical wall fixed to the upper end of the support column 36. As shown in Figs. 5 and 6, each side support plate 37 is spanned across five support columns 36 in the longitudinal direction of the alignment rack 30. A plurality of engagement grooves 37a (Fig. 5) for receiving the side edges 20b or 20c of the shear reinforcement bars 20 are formed in the horizontal wall of each side support plate 37, and are arranged at the same positions in the longitudinal direction of the alignment rack 30 as the engagement grooves 33a of the lower support plate 33.

[0037] As shown in Figure 7, casters 34a are provided inside the guide blocks 34 and journaled on their side walls to abut against the rails 32, allowing the guide blocks 34 to slide easily. Also, as shown in Figures 5 and 7, a pair of sprockets 32a, 32b are provided at both ends of one side of each rail 32. A chain 32c looped around one sprocket 32a is fixed to the top of one guide block 34 and the bottom of the other guide block 34 with end bolts 38, 38, while a chain 32d looped around the other sprocket 32b is fixed to the bottom of the other guide block 34 and the top of one guide block 34 with end bolts 38, 38. This allows the spacing between the pair of guide blocks 34, 34 to be adjusted by sliding one guide block 34, thereby adjusting the width between the bottom support plates 35, 35 and the side support plates 37, 37, and ultimately enabling shear reinforcement bars 20 of different sizes to be supported.

[0038] As shown in FIG. 5, on the other side of each rail 32, a rod-shaped guide 39 for guiding the sliding of the guide block 34 is hung across the pair of lower side frames 31, 31.

[0039] (Main reinforcement supply stand) As shown in Fig. 1, the main reinforcement supply stand 40 has an elongated shape in a plan view, and is arranged in series on one side in the longitudinal direction of the aligning rack 30 (the right side in Figs. 1 and 2). The main reinforcement supply stand 40 supplies the main reinforcement 10, i.e., upper end reinforcement 11, middle hanging reinforcement 12, and lower end reinforcement 13, into the shear reinforcement bars 20 arranged side by side on the aligning rack 30 during the assembly process of the pre-assembled rebars 2.

[0040] The main reinforcement supply table 40 has frames 42, 42 supported by multiple legs 41 shown in Figure 2. As shown in Figure 1, a pair of frames 42 extend in the longitudinal direction of the main reinforcement supply table 40 and are provided at an interval. A plurality of supply rollers 43 are stretched between the pair of frames 42, 42 and are arranged in the longitudinal direction of the frame 42. The shafts at both ends of each supply roller 43 are journaled to the frames 42, 42 and are rotatable. The main reinforcement 10 to be supplied into the shear reinforcement 20 on the alignment rack 30 are placed on the multiple supply rollers 43.

[0041] Some of the multiple supply rollers 43 (in this embodiment, the first, third, fifth, seventh, and ninth five supply rollers from the left in Fig. 1) are drive supply rollers 43d. The drive supply rollers 43d are driven by power transmitted from a motor (power source, not shown), and rotate so as to send the main reinforcements 10 on the supply rollers 43 to the aligning rack 30 side.

[0042] (Main reinforcement slide) As shown in Fig. 4, the main reinforcement feed tables 50 are fixed on each base 3, and a plurality of them (eight in this embodiment) are arranged in the longitudinal direction of the aligning rack 30. As shown in Fig. 15(A), the main reinforcement feed tables 50 carry and feed the main reinforcement 10 that has been supplied from the main reinforcement supply table 40 and inserted into the shear reinforcement bars 20 arranged side by side on the aligning rack 30.

[0043] As shown in Fig. 10(B), each main reinforcement feed table 50 has a pair of support legs 51, 51 facing each other on the base 3 in the longitudinal direction of the base 3. A spacer 52 is provided between the pair of support legs 51, 51 to maintain a constant gap. As shown in Fig. 10(C), each support leg 51 has two struts 51a, 51a arranged in the short direction of the base 3.

[0044] A bracket 53 is provided on the upper part of each support leg 51, and two feed rollers 54 are spanned between the pair of brackets 53, 53 and arranged at a distance in the short direction of the base 3. The shafts at both ends of each feed roller 54 are supported by the brackets 53, 53 and are rotatable. One feed roller 54 may be provided between the pair of brackets 53, 53, or three or more feed rollers 54 may be provided. The installation height of the feed rollers 54 is set to be approximately the same as the installation height of the supply rollers 43 of the main reinforcing bar supply table 40.

[0045] As shown in Figure 15(A) , main reinforcement bars 10 inserted into shear reinforcement bars 20 arranged side by side on an alignment rack 30 are placed in a spanning state on multiple feed rollers 54 of multiple main reinforcement feed tables 50.

[0046] Some of the feed rollers 54 are driven feed rollers 54d, and in this embodiment, one of the feed rollers of the second, fourth, sixth, and eighth main reinforcing bar feed tables 50 from the left in Fig. 4 is the driven feed roller 54d. The driven feed roller 54d is driven by power transmitted from a motor (power source) not shown, and rotates so as to feed the main reinforcing bars 10 on the feed roller 54 toward the stopper stand 60, which will be described later.

[0047] (Stopper stand) As shown in Figure 15(A), the stopper stand 60 abuts the tip of the main reinforcement 10 fed by the main reinforcement feed table 50 and positions the main reinforcement 10 in the longitudinal direction of the pre-assembled reinforcing bar 2, and is arranged on the other side of the alignment rack 30 in the longitudinal direction (the left side in Figures 1 and 2). As shown in FIGS. 1 and 2, the stopper stand 60 is made up of three members: a base 60A, a first table 60B, and a second table 60C.

[0048] (Stopper stand base) 11(A), the base 60A is formed in a rectangular shape that is long in the short-side direction of the aligning rack 30, and has a pair of lower side frames 61A, 61A that extend in the longitudinal direction of the base 60A (the short-side direction of the aligning rack 30). A plurality of rails 62A (three in this embodiment) are fixed to span the pair of lower side frames 61A, 61A, and are arranged at one end, a center portion and the other end portion of the lower side frame 61A in the longitudinal direction.

[0049] A motor 63A is provided near one end (the end on the left in FIG. 11A) of a rail 62A disposed in the longitudinal center of base 60A, and a sprocket 64A having a rotation axis in the longitudinal direction of base 60A is provided on motor 63A. A sprocket 65A having a rotation axis parallel to the rotation axis of sprocket 64A is provided near the other end (the end on the right in FIG. 11A) of rail 62A on the same side of rail 62A as sprocket 64A. Near each rail 62A, a rod-shaped guide 66A parallel to each rail 62A is bridged across the pair of lower side frames 61A, 61A.

[0050] (First table on stopper stand) 11(B), the first table 60B has a rectangular bottom plate 61B that is long in the short-side direction of the aligning rack 30, and a pair of side frames 62B, 62B extending in the short-side direction of the bottom plate 61B are provided at both ends in the longitudinal direction (short-side direction of the aligning rack 30) of the top surface of the bottom plate 61B. A plurality of rails 63B (three in this embodiment) are fixed to span the pair of side frames 62B, 62B, and are arranged at one end, a center portion, and the other end portion of the bottom plate 61B in the short-side direction.

[0051] A motor 64B is provided near one end (the upper end in FIG. 11(B)) of a rail 63B that is disposed in the center of the short side of the bottom plate 61B, and a sprocket 65B having a rotation axis in the short side direction of the bottom plate 61B is provided on the motor 64B. A sprocket 66B having a rotation axis parallel to the rotation axis of sprocket 65B is provided near the other end (the lower end in FIG. 11(B)) of the rail 63B on the same side as the sprocket 65B with respect to the rail 63B. Near each rail 63B, a rod-shaped guide 67B parallel to each rail 63B is bridged across the pair of side frames 62B, 62B.

[0052] As shown in FIG. 12(A), a plurality of guide blocks 68B (three in this embodiment) are provided on the underside of the bottom plate 61B of the first table 60B at one end, a central portion, and the other end of the bottom plate 61B in the longitudinal direction, and the three guide blocks 68B at each end are spaced apart in the lateral direction of the bottom plate 61B. The guide blocks 68B provided at one end, a central portion, and the other end of the bottom plate 61B in the longitudinal direction are attached to rails 62A arranged at one end, a central portion, and the other end of the base 60A in the longitudinal direction, respectively. In this way, the first table 60B is attached to the base 60A. Each guide block 68B slidably surrounds the corresponding rail 62A. This allows the first table 60B to move relative to the base 60A in the lateral direction of the base 60A (the longitudinal direction of the alignment rack 30).

[0053] A pulley 69Bb is provided via an arm 69Ba on the side of each guide block 68B facing the adjacent guide 66A. When the pulley 69Bb abuts against the adjacent guide 66A, the guide block 68B is guided by the guide 66A and is easily slidable.

[0054] As shown in FIG. 12(A), in base 60A, a chain 67A is looped around sprocket 64A on the motor 63A side and sprocket 65A. One end of the chain 67A is fixed to a side surface of a guide block 68B located in the center of the bottom plate 61B in the longitudinal and lateral directions by an end bolt 68A from the sprocket 64A side, and the other end of the chain 67A is fixed to a side surface of the guide block 68B from the sprocket 65A side by an end bolt 68A.

[0055] Therefore, the rotational motion of motor 63A is converted into linear motion of guide block 68B via sprockets 64A, 65A and chain 67A. That is, power is transmitted from motor 64A to drive first table 60B in the short direction of base 60A (longitudinal direction of alignment rack 30).

[0056] (Second table on stopper stand) 11(C) and 2, the second table 60C has a rectangular bottom plate 61C, a support frame 62C made by combining elongated rod-like members into a square pillar shape on the bottom plate 61C, and a butting plate 63C attached to the support frame 62C on the side of the aligning rack 30 with its plate surface facing the longitudinal direction of the aligning rack 30. This butting plate 63C abuts the tips of the main reinforcements 10 fed by the main reinforcement feed table 50.

[0057] As shown in FIG. 12(B), a plurality of guide blocks 64C (three in this embodiment) are provided on the underside of the bottom plate 61C of the second table 60C at one end, a center, and another end in the left-right direction in FIG. 12(B) (the longitudinal direction of the alignment rack 30). The three guide blocks 64C at each end are spaced apart in the up-down direction in FIG. 12(B) (the lateral direction of the alignment rack 30). The guide blocks 64C provided at one end, a center, and another end in the left-right direction in FIG. 12(B) of the bottom plate 61C are attached to rails 63B arranged at one end, a center, and another end in the lateral direction of the first table 60B, respectively. This allows the second table 60C to be attached to the first table 60B. Each guide block 64C slidably surrounds the corresponding rail 63B. This allows the second table 60C to move relative to the first table 60B in the longitudinal direction of the first table 60B (the lateral direction of the alignment rack 30).

[0058] A pulley 66C is provided via an arm 65C on the side of each guide block 64C facing the adjacent guide 67B. When the pulley 66C abuts against the adjacent guide 67B, the guide block 64C is guided by the guide 67B and is easily slidable.

[0059] As shown in FIG. 12(B), in the first table 60B, a chain 69Bc is looped around a sprocket 65B on the motor 64B side and a sprocket 66B. One end of the chain 69Bc is fixed to a side surface of the guide block 64C located in the center of the bottom plate 61C in the left-right and up-down directions in Figure 12(B) by an end bolt 69Bd from the sprocket 65B side, and the other end of the chain 69Bc is fixed to a side surface of the guide block 64C by an end bolt 69Bd from the sprocket 66B side.

[0060] Therefore, the rotational motion of motor 64B is converted into linear motion of guide block 64C via sprockets 65B, 66B and chain 69Bc. That is, power is transmitted from motor 64B to drive second table 60C in the longitudinal direction of first table 60B (the lateral direction of alignment rack 30).

[0061] As described above, the first table 60B and the second table 60C of the stopper stand 60 are respectively movable in the longitudinal and lateral directions of the aligning rack 30, and therefore the abutment plate 63C of the second table 60C is movable in the longitudinal and lateral directions of the aligning rack 30. By moving the abutment plate 63C in the longitudinal direction, it is possible to accommodate pre-assembled rebars 2 of various lengths, and by moving it in the lateral direction, it is possible to attach joints to the ends of the main reinforcements 10 or to move the assembled pre-assembled rebars 2 in the longitudinal direction and carry them out.

[0062] (Main frame) 4 is the rear side, and four main stands 70 are provided in this embodiment, arranged in the longitudinal direction along the aligning rack 30. As shown in Fig. 16, the main stands 70 support the upper end reinforcements 11 (first main reinforcements) inserted into the shear reinforcements 20 arranged side by side on the aligning rack 30 so that they can be raised and lowered, and in this description, the main stands 70 are referred to as first main reinforcement transport means.

[0063] As shown in Figures 3 and 4, each main stand 70 has a pair of support pillars 71, 71 arranged opposite each other and fixed to a single base 3, a lifting section 72 provided on each support pillar 71, and a first bar 73 spanning the pair of lifting sections 72, 72.

[0064] As shown in Figures 3 and 4, the pair of support pillars 71, 71 are made of H-shaped steel and are positioned on the base 3 outside the lower edge support plates 33, 35 and side edge support plates 37 of the alignment rack 30, as well as the main reinforcement feed table 50. Each lifting section 72 is attached to the support section 71 so as to surround the support section 71 and be movable up and down.

[0065] As shown in FIG. 9(B), in this embodiment, each lifting section 72 is formed with a pair of bar receiving sections 72a that penetrate the base 3 in the longitudinal direction, and are arranged on either side of the support section 71 in the lateral direction of the base 3. The bar receiving sections 72a may be formed in the shape of a long groove that extends in the longitudinal direction of the base 3 and is open at the top. An end of a first bar 73 is detachably attached to the bar receiving sections 72a. The first bar 73 is bridged across the pair of lifting sections 72, 72 by having both ends attached to the bar receiving sections 72a, 72a that face each other in the longitudinal direction of the base 3 (the lateral direction of the alignment rack 30).

[0066] 4, in a plan view, the pair of first bars 73, 73 of each main frame 70 are spaced apart so that the main reinforcement feed table 50 fits between them. Therefore, the first bars 73 do not interfere with the main reinforcement feed table 50 when raised and lowered. As shown in FIG. 13, when the lifting unit 72 is positioned at the lowest position, the first bar 73 is located lower than the feed roller 54 of the main reinforcement feed table 50.

[0067] 16(A), the first bar 73 of one of the four main frames 70 and the first bar 73 of the other main frames 70 support the upper end reinforcement 11 (first main reinforcement) inserted into the shear reinforcement 20 in a spanning state so that the upper end reinforcement 11 can be raised and lowered. In this embodiment, the first bar 73 is a square pipe, but it may also be a square bar, a round pipe, a round bar, or other material.

[0068] 9(B), sprockets 74t, 74b are provided at the top and bottom of each support column 71. A chain 75 is hung on these sprockets 74t, 74b. One end of the chain 75 is fixed to the upper side of the lifting / lowering section 72 by an end bolt 76, and the other end is fixed to the lower side of the lifting / lowering section 72 by an end bolt 76.

[0069] As shown in FIGS. 8 and 9(A), a motor 77 is provided on the base 3 near one of the pair of support columns 71. A shaft 78 extending from the motor 77 is connected to sprockets 74b at the bottom of the pair of support columns 71. As a result, the rotational motion of the motor 77 is converted into vertical motion of the elevator 72 via the shaft 78, the sprockets 74b and 74t of each support column 71, and the chain 75. That is, power is transmitted from the motor 77 to drive the pair of elevators 72. The pair of elevators 72 can be raised and lowered at the same height. Furthermore, all of the elevators 72 in different main frames 70 can behave in the same way.

[0070] (Sub-stand) The sub-mounts 80 are fixed to the even-numbered bases 3 from the rear, with the left side of Fig. 4 being the rear side, and in this embodiment, four are provided, arranged in the longitudinal direction along the aligning rack 30. As shown in Figs. 17(A) to 19(B), the sub-mounts 80 support the central hanging bars 12 (second main bars) inserted into the shear reinforcement bars 20 arranged side by side on the aligning rack 30 in a manner that allows them to be raised and lowered, and in this description, the sub-mounts 80 are referred to as second main reinforcement transport means. The sub-mounts 80 may also support the bottom end reinforcements 13 (second main reinforcements).

[0071] In this embodiment, the sub-cartridge 80 has the same structure as the main cartridge 70. As shown in FIGS. 2 and 4, the support column 81, the lifting section 82, the bar support section 82a, and the second bar 83 of the sub-cartridge 80 correspond to the support column 71, the lifting section 72, the bar support section 72a, and the first bar 73 of the main cartridge 70, respectively. The sub-cartridge 80 also has sprockets 84t and 84b, a chain 85, an end bolt 86, a motor 87, and a shaft 88 (not shown, each of which is given a reference numeral for ease of explanation), which correspond to the sprockets 74t and 74b, the chain 75, the end bolt 76, the motor 77, and the shaft 78 of the main cartridge 70, respectively. Therefore, only the differences between the main cartridge 70 and the sub-cartridge 80 will be described.

[0072] 17(A) to 19(B), the second bar 83 of one sub-frame 80 of the four wide frames 80 and the second bar 83 of the other wide frames 80 support the middle hanging bars 12 (second main bars) inserted into the shear reinforcement bars 20 in a bridging state so that they can be raised and lowered. The second bar 83 of one sub-frame 80 and the second bar 83 of the other wide frames 80 can also support the bottom end bars 13 (second main bars) inserted into the shear reinforcement bars 20 in a bridging state so that they can be raised and lowered.

[0073] All of the lifting sections 82 in the different sub-cartridges 80 may behave in the same manner, but may behave differently from the lifting sections 72 of the main cartridge 70. As shown in FIG. 2, a beam member 4 may be provided between the upper ends of the support columns 71 of the main cartridge 70 and the support columns 81 of the sub-cartridges 80.

[0074] As described above, since the sub-frame 80 has the same structure as the main frame 70, the transport means for the middle hanging reinforcement 12 and the lower end reinforcement 13 (second main reinforcement) is common to the transport means for the upper end reinforcement 11 (first main reinforcement). Therefore, the procurement costs of the main frame 70 and the sub-frame 80 are reduced.

[0075] (scaffold) As shown in Figures 1 to 3, the scaffolding 90 has scaffolding platforms 91, 91 (Figures 2 and 3) provided on both sides of the alignment rack 30 in the short direction, scaffolding boards 92, 92 supported by the scaffolding platforms 91, 91 on both sides, and a lattice scaffolding 93 (Figure 1) provided above the alignment rack 30 between the scaffolding boards 92, 92 on both sides.

[0076] The scaffolding boards 92 and lattice scaffolding 93 are used as a workspace for workers during the assembly process of the pre-assembled reinforcing bars 2 when arranging the shear reinforcement bars 20 on the alignment rack 30, when placing the main reinforcement bars 10 at predetermined positions within the shear reinforcement bars 20, when tying the shear reinforcement bars 20 to the main reinforcement bars 10, when hooking the core reinforcement bars 14, 15 onto the main reinforcement bars 10, and when tying the main reinforcement bars 10 to the core reinforcement bars 14, 15.

[0077] The gaps in the lattice scaffolding 93 shown in Fig. 1 are set to a size that allows the insertion of shear reinforcement 20 and core reinforcements 14, 15. As shown in Fig. 3, a fence 94 may be provided on the opposite side of each scaffolding plank 92 from the alignment rack 30 to prevent workers from falling.

[0078] [Pre-assembled rebar assembly method] A method for assembling the pre-assembled reinforcing bar 2 using the assembling device 1A configured as described above will be described with reference to FIGS. 13 to 22, which are schematic diagrams of the individual steps.

[0079] (lowering of the lifting section) 13(A) and (B), before starting the assembly of the pre-assembled rebars 2, the lifting sections 72, 82 of the main frame 70 and the sub-frame 80 are all lowered to their lowest positions. The first bar 73 and the second bar 82 are positioned below the feed rollers 54 of the main reinforcing bar feed table 50.

[0080] (Arrangement of stop plates) The abutment plate 63C of the stopper stand 60 is located on an extension of the arrangement direction of the main reinforcement feed table 50 (the longitudinal direction of the alignment rack 30), and is positioned so that it faces the main reinforcement supply table 40 (Figures 1 and 2) in the same longitudinal direction and can abut against the main reinforcement 10.

[0081] (Alignment of shear reinforcement) First, as shown in FIGS. 14(A) and 14(B), the shear reinforcement bars 20 are aligned in an upright state on an alignment rack 30 at predetermined intervals.

[0082] (Insertion of upper end reinforcement into shear reinforcement) 15(A) and (B), upper end reinforcement 11 (first main reinforcement) is supplied from the main reinforcement supply table 40 (FIG. 1) toward the inside of the shear reinforcement 20 arranged side by side on the alignment rack 30. The upper end reinforcement 11 is moved by the drive supply roller 43d on the main reinforcement supply table 40 and inserted into the shear reinforcement 20, and then moved by the drive feed roller 54d on the main reinforcement feed table 50 until its tip abuts against the abutment plate 63C of the stopper stand 60.

[0083] (Transporting the upper end reinforcement upward and placing it in the reinforcement position) Next, as shown in Figure 16(A), the lifting units 72 of the main stand 70 are raised, and the first bars 73 of the multiple lifting units 72 support the upper end reinforcements 11 in a spanning state, and the upper end reinforcements 11 are carried close to the upper edge portion 20a of the shear reinforcement 20. Next, as shown in Figure 16(B), the upper end reinforcements 11 on the first bars 73 are arranged at the reinforcement position in the width direction of the upper edge portion 20a.

[0084] (Top reinforcement) Next, as shown in Figure 17(A), the lifting section 72 of the main frame 70 is further raised, the upper end reinforcement 11 is transported to the inside of the upper edge portion 20a of the shear reinforcement 20, and the upper end reinforcement 11 is tied to the shear reinforcement 20 with a metal wire or the like.

[0085] (Insertion of the central hanging bar placed above the shear reinforcement) Furthermore, the central hanging bars 12 arranged above the shear reinforcement bars 20 are inserted into the shear reinforcement bars 20 from the main reinforcement supply base 40 (Fig. 1) and moved by the main reinforcement feed base 50 until their tips abut against the butt plate 63C of the stopper stand 60 (Fig. 2). Note that the insertion of the central hanging bars 12 may be performed before the arrangement of the upper end reinforcement bars 11.

[0086] (Upward transport and placement of the suspension bars) Next, as shown in Figure 17(B), the lifting section 82 of the sub-frame 80 is raised, the second bars 83 of the multiple lifting sections 82 support the central hanger bars 12 in a spanning state, the central hanger bars 12 are transported to the highest reinforcement height, and the two uppermost central hanger bars 12, 12 are placed at the reinforcement positions and tied to the side edges 20b, 20c of the shear reinforcement bars 20 using metal wire or the like.

[0087] (Arrangement of core bars) Next, as shown in Figure 18(A), the bent portions 14b, 14b of the core bars 14 are hooked to the two uppermost arranged central hanger bars 12, 12 and bound with metal wire or the like. Next, as shown in Figure 18(B), the lifting section 82 of the sub-frame 80 is lowered, and the remaining central hanger bars 12 other than the top one are arranged in order from top to bottom, and core bars 14 are arranged around the arranged central hanger bars 12.

[0088] (Lifting of shear reinforcement) Next, to enable and facilitate the arrangement of the central hanging reinforcing bars 12 and bottom end reinforcing bars 13 below the shear reinforcement bars 20, the lifting section 72 of the main frame 70 is further raised as shown in Figure 19(A). As a result, the shear reinforcement bars 20 are lifted via the top end reinforcing bars 11 suspended across the first bar 73, and are removed from the alignment rack 30 (Figure 3). The shear reinforcement bars 20 are lifted so that their bottom edges 20d are positioned slightly below the top ends of the feed rollers 54 of the main reinforcement feed table 50.

[0089] (Insertion of the central hanging bar placed at the bottom of the shear reinforcement) Furthermore, the lifting section 82 of the sub-frame 80 is lowered to its lowest position, and the central hanging reinforcing bars 12 arranged below the shear reinforcing bars 20 are inserted from the main reinforcing bar supply base 40 (Fig. 1) into the shear reinforcing bars 20, and then moved by the main reinforcing bar feed base 50 until their tips abut against the butt plate 63C of the stopper stand 60 (Fig. 2). Note that the insertion of the central hanging reinforcing bars 12 may be performed before the shear reinforcing bars 20 are lifted.

[0090] (Transportation and placement of suspension bars) Next, as shown in Figures 19(B) and 20(A), the lifting sections 82 of the sub-frame 80 are raised, the second bars 83 of the multiple lifting sections 82 support the central hanger bars 12 in a spanning state, and the lifting sections 82 are lowered in order from top to bottom to arrange the central hanger bars 12. Core bars 14 are arranged in the arranged central hanger bars 12.

[0091] (Attaching the core bars to the top bars) Next, as shown in Figures 20(B) and 21(A), one of the bent portions 15b of the core reinforcement 15 is hooked onto the upper end reinforcement 11 arranged at other than both ends inside the upper edge portion 20a of the shear reinforcement 20.

[0092] (Insertion of bottom reinforcement into shear reinforcement) Next, as shown in Figure 21(B), the bottom reinforcement 13, which is arranged inside the bottom edge 20d of the shear reinforcement 20, is aligned with the other bent part 15b of the core reinforcement 15 and inserted from the main reinforcement supply table 40 (Figure 1) into the shear reinforcement 20. The bottom reinforcement 13 is moved by the main reinforcement feed table 50 until the tip of the bottom reinforcement 13 abuts against the butt plate 63C of the stopper stand 60 (Figure 2).

[0093] (Further lifting of shear reinforcement and arrangement of bottom reinforcement) Next, as shown in Figure 22, the lifting section 72 of the main frame 70 is further raised to further lift up the shear reinforcement 20, and the bottom end reinforcement 13 is tied to the inside of the bottom edge portion 20d of the shear reinforcement 20 with a metal wire or the like. The other bent portion 15b of the core reinforcement 15 is tied to the bottom end reinforcement 13. In this way, the pre-assembled rebar 2 is assembled.

[0094] (Transportation of completed pre-assembled rebars) The completed pre-assembled rebar 2 can be transported by hooking a wire from a crane to the upper end rebar 11 (both not shown) and removing the first bar 73 of the main frame 70. By moving the abutment plate 63C of the stopper stand 60 in the short direction of the pre-assembled rebar 2 (the short direction of the alignment rack 30), the pre-assembled rebar 2 can also be transported from the stopper stand 60 side in its longitudinal direction.

[0095] [Effects of the first embodiment] According to the above embodiment, the upper end reinforcement 11, the middle hanging reinforcement 12, and the lower end reinforcement 13 are supplied by the driven supply roller 43d from the main reinforcement supply table 40, inserted into the shear reinforcement 20, placed on the driven feed roller 54d of the main reinforcement feed table 50, and fed to the butt plate 63C. The upper end reinforcement 11 and the middle hanging reinforcement 12 are carried to the height at which they will be placed within the shear reinforcement 20 by the main frame 70 and the sub-frame 80, respectively. This reduces the labor required to assemble the pre-assembled rebars 2, thereby improving the productivity of assembling the pre-assembled rebars 2.

[0096] Next, other embodiments of the present invention will be described. Note that in the following embodiments, only the configurations that are different from the above embodiment will be described, and similar components will be assigned the same reference numerals and their description will be omitted.

[0097] Second Embodiment 23 to 27 show a second embodiment of the present invention. In this embodiment, a pair of scaffolding boards supporting a main reinforcing bar feed platform in a spanning state are raised and lowered by a scaffolding board lift, thereby functioning as a second main reinforcing bar transporting means. In addition, the main reinforcing bar supply platform is raised and lowered by a main reinforcing bar supply platform lift.

[0098] [Scaffolding board lift] 23 to 25 differs from the first embodiment in that it does not have any sub-mounts, but has only four main mounts 70. Furthermore, in the assembly device 1B, each scaffolding board 92 is supported by a scaffolding board lift 5A so as to be able to rise and fall, instead of the scaffolding platform 91 of the first embodiment.

[0099] As shown in Figures 26 and 27, a main reinforcement feed table 50 is spanned across each scaffolding plank 92 with its pair of support legs 51, 51 fixed. The main reinforcement feed tables 50 are arranged alternately with the main frames 70 in the longitudinal direction of the aligning rack 30 at intervals, and five main reinforcement feed tables 50 are arranged in this embodiment. Each main reinforcement feed table 50 in this embodiment has four feed rollers 54. Some of the feed rollers 54 may be drive feed rollers 54d.

[0100] 24, 25, and 27, a plurality of scaffolding board lifts 5A are provided at intervals in the longitudinal direction of each scaffolding board 92. In this embodiment, the scaffolding board lifts 5A are arranged at three locations on each scaffolding board 92 in the longitudinal direction: at one end, the center, and the other end.

[0101] [Lift for main reinforcing bar supply stand] As shown in Figures 24 and 25, the main reinforcing bar supply table 40 has its legs 41 fixed to a base plate 44 that extends in the same direction as the pair of frames 42, 42 and is parallel to them. The base plate 44 is supported by a main reinforcing bar supply table lift 5B so that it can be raised and lowered. As shown in Figures 23 to 25, a plurality of main reinforcing bar supply table lifts 5B are provided at intervals in the longitudinal direction of the base plate 44. In this embodiment, the main reinforcing bar supply table lifts 5B are arranged at three locations on the base plate 44: one end, a center portion, and the other end portion in the longitudinal direction.

[0102] [Details of the scaffolding plank and main reinforcing bar supply lift] The scaffolding plank lift 5A and the main reinforcing bar supply platform lift 5B both have the same structure and are composed of a vertical lift 100. As shown in Figure 25, the lift 100 supports a table 103 above a lower frame 101 via a pair of link mechanisms 102 that can be extended and retracted up and down so that the table 103 can be raised and lowered.

[0103] 25 and 26, each link mechanism 102 is formed by stacking two tiers of relatively rotatable X-shaped arms 102a. The two lower ends of the upper X-shaped arm 102a are respectively connected to the two upper ends of the lower X-shaped arm 102a so as to be relatively rotatable. The X-shaped arms 102a may be stacked in one tier, or in three or more tiers.

[0104] One of the two lower ends of the lower X-shaped arm 102a, lower end 102b, is attached to the lower frame 101 so as to be rotatable relative to the lower frame 101, and the other lower end 102c is attached to the table 103 so as to be slidable horizontally. One of the two upper ends of the upper X-shaped arm 102a, upper end 102d, is attached to the table 103 so as to be rotatable relative to the table 103, and the other upper end 102e is attached to the table 103 so as to be slidable horizontally.

[0105] As the link mechanism 102 expands and contracts, the lower end 102c and the upper end 102e slide on the lower frame 101 and the table 103, respectively. An electric screw cylinder (not shown) is attached to the link mechanism 102 for raising and lowering the table 103. A hydraulic cylinder may be used instead of the electric screw cylinder.

[0106] 23, the table 103 has a rectangular shape in a plan view and supports the scaffolding boards 92 or the floor boards 44. In the scaffolding board lift 5A, the longitudinal direction of the table 103 is oriented in the short direction of each scaffolding board 92, and in the main reinforcement supply platform lift 5B, the longitudinal direction of the table 103 is oriented in the longitudinal direction of the floor boards 44.

[0107] [Effects of the second embodiment] With the assembly device 1B configured as described above, even when assembling pre-assembled reinforcing bars 2 with large beam depth, column depth, and column width, the scaffolding board 92 can be raised by the scaffolding board lift 5A, making it possible to work near the upper edge 20a of the shear reinforcement bar 20. Furthermore, the feed rollers 54 of the multiple main reinforcement feed tables 50 support the central hanging reinforcing bars 12 and bottom end reinforcing bars 13 inserted into the shear reinforcement bars 20 in a spanning state, and can be transported to the height at which they are to be placed within the shear reinforcement bars 20 by raising and lowering the scaffolding board lift 5A. In this way, the scaffolding board lift 5A, scaffolding boards 92, and main reinforcement feed tables 50 serve as second main reinforcement transport means. The main reinforcement feed tables 50 also serve as part of the second main reinforcement transport means. Furthermore, by raising and lowering the main reinforcement supply table 40 using the main reinforcement supply table lift 5B in conjunction with the raising and lowering of the main reinforcement feed table 50 using the scaffolding board lift 5A, it becomes possible to supply the upper end reinforcement 11, central hanging reinforcement 12, and bottom end reinforcement 13 from the arrangement height of each main reinforcement 10 within the shear reinforcement 20. This makes it possible to perform, in a single process, the process of supplying the central hanging reinforcement 12, etc. within the shear reinforcement 20, which is necessary when the main reinforcement supply table 40 is not raised and lowered, and the process of carrying the central hanging reinforcement 12, etc. to the arrangement height within the shear reinforcement 20. This in turn improves the workability of assembling the pre-assembled rebars 2. [Industrial Applicability]

[0108] The present invention can be applied to an assembly device and an assembly method for pre-assembling reinforcing bars that constitute columns, beams, etc. of reinforced concrete structures. [Explanation of symbols]

[0109] 1A, 1B: assembly equipment, 2: Pre-assembled rebar, 3: base, 4: beam member, 5A: Scaffolding board lift, 5B: Main reinforcement supply stand lift, 10: Main reinforcement, 11: Upper end main reinforcement (first main reinforcement), 12: Middle hanging reinforcement (second main reinforcement), 13: Lower end reinforcement (second main reinforcement), 14: Core reinforcement (horizontal core reinforcement), 14a: Horizontal section, 14b: Bending section, 15: Core (vertical core), 15a: Vertical part, 15b: Bending part, 20: shear reinforcement, 20a: upper edge portion, 20b, 20c: side edge portion, 20d: lower edge portion, 30: alignment rack, 31: lower side frame, 32: rail, 32a, 32b: sprockets, 32c, 32d: Chain, 33: Lower edge support plate, 33a: Engagement groove, 34: Guide block, 34a: Caster, 35: Lower edge support plate, 35a: Engagement groove, 36: Support portion, 37: Side edge support plate, 37a: Engagement groove, 38: End bolt, 39: Guide, 40: Main reinforcement supply stand, 41: Leg, 42: Frame, 43: Supply roller, 43d: Drive supply roller, 50: Main reinforcement feed table, 51: Support leg, 51a: Support column, 52: Spacer, 53: Bracket, 54: Feed roller, 54d: Drive feed roller, 60: Stopper stand, 60A: Base, 61A: Lower side frame, 62A: Rail, 63A: Motor, 64A, 65A: Sprocket, 66A: Guide, 67A: Chain, 68A: End bolt, 60B: first table, 61B: bottom plate, 62B: side frame, 63B: rail, 64B: motor, 65B, 66B: sprocket, 67B: guide, 68B: guide block, 69Ba: Arm, 69Bb: Pulley, 69Bc: Chain, 69Bd: End bolt, 60C: second table, 61C: bottom plate, 62C: support frame portion, 63C: abutment plate, 64C: Guide block, 65C: Arm, 66C: Pulley, 70: Main frame (first main reinforcement conveying means), 71: Support part, 72: Lifting part, 72a: Bar receiving part, 73: first bar, 74t, 74b: sprocket, 75: chain, 76: end bolt, 77: motor, 78: shaft, 80: Sub-frame (second main reinforcement transport means), 81: Support section, 82: Lifting section, 82a: Bar receiving section, 83: second bar, 84t, 84b: sprocket, 85: chain, 86: end bolt, 87: motor, 88: shaft, 90: scaffolding, 91: scaffolding platform, 92: scaffolding board, 93: lattice scaffolding, 94: fence, 100: vertical lift, 101: lower frame, 102: link mechanism, 102a: X-shaped arm, 102b, 102c: lower end of X-shaped arm, 102d, 102e: upper end of X-shaped arm, 103: table

Claims

1. An apparatus for assembling pre-assembled reinforcing bars having a plurality of main reinforcements and a plurality of frame-shaped shear reinforcement bars surrounding the main reinforcements, wherein the plurality of main reinforcements include a plurality of first main reinforcements arranged inside the upper edge portions of the upright shear reinforcement bars and a plurality of second main reinforcements arranged within the shear reinforcement bars other than inside the upper edge portions, A) An alignment rack having an elongated shape in a plan view, on which a plurality of the shear reinforcements are arranged upright at predetermined intervals; a) A main reinforcement supply table that is arranged on one side of the aligning rack in the longitudinal direction and supplies the main reinforcement toward the shear reinforcement arranged side by side on the aligning rack, and has a plurality of rotatable supply rollers extending in the short direction of the aligning rack in the longitudinal direction, and these supply rollers carry the main reinforcement and include drive supply rollers that are driven by power transmitted from a power source; c) a plurality of main reinforcement feed tables arranged along the alignment rack, each of which has a rotatable feed roller extending in a direction intersecting the alignment rack, and which feeds the main reinforcement supplied from the main reinforcement supply table and inserted into the shear reinforcement arranged in the alignment rack; and d) A stopper stand that is arranged on the other side of the alignment rack in the longitudinal direction thereof and has an abutment plate with its plate surface facing the one side, and this abutment plate abuts against the tip of the main reinforcement fed by the main reinforcement feed table; e) A first main reinforcement transporting means for supporting the first main reinforcement inserted into the shear reinforcement so that it can be raised and lowered, the first main reinforcement transporting means being a plurality of main stands arranged along the alignment rack, each of which has a first bar that can be raised and lowered and extends in a direction intersecting the alignment rack, and the first bars of the plurality of main stands support and lift the first main reinforcement inserted into the shear reinforcement in a spanning state, thereby allowing the shear reinforcement lifted via the first main reinforcement to be removed from the alignment rack; and F) a second main reinforcement conveying means for supporting the second main reinforcement inserted into the shear reinforcement so that the second main reinforcement can be raised and lowered; An assembly device for pre-assembled reinforcing bars, comprising:

2. The pre-assembled reinforcing bar assembling device according to claim 1, the second main reinforcement bar transporting means is a plurality of sub-frames arranged along the alignment rack, Each sub-rack has a second bar that can be raised and lowered and extends in a direction intersecting the alignment rack, A pre-assembled reinforcing bar assembly device characterized in that the second bars of the plurality of sub-frames support the second main bars inserted into the shear reinforcement bars in a spanning state and carry them to the placement height within the shear reinforcement bars.

3. The pre-assembled reinforcing bar assembling device according to claim 1, A pair of scaffolding boards provided on both sides of the alignment rack in the short side direction; and a scaffolding board lift that supports and elevates each scaffolding board. The main reinforcement slide is spanned across the pair of scaffolding boards, The scaffolding plank lift, the scaffolding plank, and the main reinforcement slide are provided as the second main reinforcement conveying means, This pre-assembled reinforcing bar assembly device is characterized in that, as the scaffolding board lift rises and falls, the feed rollers of the multiple main reinforcement feed tables support the second main reinforcement inserted into the shear reinforcement in a spanning state and transport it to the placement height within the shear reinforcement.

4. The pre-assembled reinforcing bar assembling device according to claim 3, The pre-assembled reinforcing bar assembling device further comprises a main reinforcing bar supply table lift for supporting and raising and lowering the main reinforcing bar supply table.

5. The pre-assembled reinforcing bar assembling device according to any one of claims 1 to 4, An assembly device for pre-assembled reinforcing bars, characterized in that the abutment plate of the stopper stand is movable in the longitudinal and lateral directions of the alignment rack.

6. The pre-assembled reinforcing bar assembling device according to claim 5, A pre-assembled rebar assembly device characterized in that the feed rollers of the main rebar feed table include drive feed rollers that are driven by power transmitted from a power source.

7. A method for assembling pre-assembled reinforcing bars having a plurality of main reinforcements and a plurality of frame-shaped shear reinforcements surrounding these main reinforcements, an aligning step of arranging the plurality of shear reinforcements in an upright state at predetermined intervals; an insertion step of supplying and inserting a plurality of the main reinforcements into the arranged shear reinforcements by power; a main reinforcement feeding step of feeding the main reinforcement inserted into the shear reinforcement to a predetermined position; A reinforcement arrangement process in which the main reinforcement inserted to a predetermined position in the shear reinforcement is transported by a transport means to an arrangement height in the shear reinforcement and arranged at a predetermined position; A method for assembling pre-assembled reinforcing bars, characterized by comprising:

8. The method for assembling a pre-assembled reinforcing bar according to claim 7, The plurality of main reinforcements include a plurality of first main reinforcements arranged inside the upper edge portions of the shear reinforcement bars arranged side by side at predetermined intervals in an upright state, and a plurality of second main reinforcements arranged in the shear reinforcement bars other than the inside of the upper edge portions, The insertion process includes a first main reinforcement insertion process in which the main reinforcement is the first main reinforcement, and a second main reinforcement insertion process, which is carried out after the first main reinforcement insertion process, in which the main reinforcement is the second main reinforcement, The reinforcement arrangement process includes a first main reinforcement arrangement process in which the main reinforcement is the first main reinforcement, and a second main reinforcement arrangement process, which is carried out after the first main reinforcement arrangement process, in which the main reinforcement is the second main reinforcement, This method for assembling pre-assembled rebars is characterized in that in this second main reinforcement arrangement process, a horizontal core reinforcement arrangement process is carried out in which a horizontal core reinforcement having a horizontal portion extending horizontally is arranged in a bridging state between the two second main reinforcements arranged at the same height.

9. The method for assembling pre-assembled reinforcing bars according to claim 8, A method for assembling pre-assembled reinforcing bars, characterized in that it further includes a vertical tangential bar installation step of installing a vertical tangential bar having a vertical portion extending vertically to the first main bar arranged inside the upper edge portion of the shear reinforcement, and a vertical tangential bar installation step of hooking one of the bent portions provided at both ends of the vertical portion of the vertical tangential bar onto the first main bar.

10. The method for assembling a pre-assembled reinforcing bar according to any one of claims 7 to 9, The method for assembling pre-assembled reinforcing bars is characterized in that the main reinforcing bars are fed by power in the main reinforcing bar feeding process.

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