Reinforced concrete cage assembly method and assembly device

Abstract

To improve workability of assembly of a pre-assembling cage to improve a quality of the assembled pre-assembling cage.SOLUTION: An assembly device 1 that pre-assembles a cage C having a main reinforcement 10 and a shear reinforcement 20 comprises a reinforcement arrangement rack 30 where the shear reinforcements 20 are arranged in parallel, and a plurality of first frames 40 arranged along the reinforcement arrangement rack 30 and across which top edge main reinforcements 11 are bridged and placed. The reinforcement arrangement rack 30 has a plurality of engaging grooves 32a and 36a that are formed with a prescribed interval, and these engaging grooves hold the shear reinforcements 20 attachably / detachably in an erected state. The first frame 40 has a column part 41 arranged proximately on the reinforcement arrangement rack 30 and a main reinforcement placing part 42 liftably supported by the column part 41, extending to a direction intersecting the reinforcement arrangement rack 30, and on which the top edge main reinforcement 11 is placed. The main reinforcement placing part 42 places the top edge main reinforcement 11 inserted into the shear reinforcement 20 held by the engaging groove of the reinforcement arrangement rack 30 and can lift it up to the inside of an upper lib 20a of the shear reinforcement 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] In the construction of reinforced concrete structures, a so-called pre-assembly method is used in which reinforcing bars such as columns and beams are pre-assembled on the ground, which shortens the construction period and stabilizes the quality of the reinforcing bars.

[0003] The following Patent Document 1 discloses an assembly device and an assembly method for a pre-assembled reinforcing bar cage of a beam. The pre-assembled rebar cage has multiple main bars extending parallel to each other and multiple frame-shaped ribs (shear reinforcement) surrounding the main bars. The multiple main bars consist of upper main bars arranged above the ribs and lower main bars arranged below the ribs.

[0004] The assembly device in Patent Document 1 has three pedestals arranged in a straight line at intervals. These pedestals consist of one end pedestal, an intermediate pedestal, and an opposite end pedestal, and each pedestal has a beam at its upper end that supports the upper end main reinforcement and rollers that are arranged to be able to rise and fall and assist the horizontal movement of the upper end main reinforcement and the lower end main reinforcement. The intermediate pedestal also has a pedestal that can be raised and lowered.

[0005] In the method for assembling a pre-assembled reinforcing bar cage using the assembly device described in Patent Document 1, first, the stiffener support of the intermediate frame is set to a predetermined height, and the bundled stiffeners are held there. The rollers of each frame are set at the top, above the beam. Next, the upper main reinforcement bars are moved horizontally from the rollers of the frame at one end to the rollers of the intermediate and other frame ends, and inserted into the bundled stiffeners held in the stiffener support.

[0006] Next, the rollers supporting the upper main reinforcement bars on all pedestals are lowered to the middle position. This allows the upper main reinforcement bars to be supported by the beams of each pedestal. After that, the stiffener support base is lowered, and the stiffener bars are suspended from the upper main reinforcement bars. Next, the lower main reinforcement bars are moved horizontally from the rollers of the pedestal on one end lowered to the middle position onto the rollers of the intermediate and other pedestals at the same middle position, and are inserted into the bundle of stiffener bars suspended from the upper main reinforcement bars.

[0007] Next, the bundled reinforcing bars are placed at predetermined positions along the length of the upper main reinforcing bars. All rollers supporting the lower main reinforcing bars are then lowered to their lowest positions, placing the lower main reinforcing bars on the bottom of the reinforcing bars. The pre-assembled reinforcing bar cage is then assembled by tying the reinforcing bars to the upper and lower main reinforcing bars. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 04-203165 Summary of the Invention [Problem to be solved by the invention]

[0009] In the assembly device and method for pre-assembled rebar cages in Patent Document 1, each rib must be placed at a predetermined position in the longitudinal direction of the upper end main rebars from the bundle of ribs hanging from the upper end main rebars, which makes rib placement workless. Furthermore, there is a risk that the ribs will be placed at inaccurate intervals on the upper end main rebars. Therefore, the placement positions of the ribs are usually marked on the upper end main rebars, but this marking requires time and effort.

[0010] In addition, the rollers of each frame were set at the top when inserting the upper main reinforcing bars into the ribs, and at the middle position when inserting the lower main reinforcing bars. This meant that the main reinforcing bars had to be inserted into the ribs from different height positions depending on the type of main reinforcing bar, which made it difficult to insert the main reinforcing bars into the ribs. Furthermore, when two upper and two lower reinforcing bars are provided in addition to the upper and lower main reinforcing bars within the ribs, multiple workers are required to hold the two-stage reinforcing bars when tying them to the ribs, which makes the installation of the main reinforcing bars less efficient. [Means for solving the problem]

[0011] The present invention has been made to solve at least one of the above problems, and a method for assembling a reinforcing bar cage according to one aspect of the present invention comprises: A method for assembling a reinforcing bar cage having a plurality of main reinforcements having portions extending parallel to each other and a plurality of frame-shaped shear reinforcements surrounding the main reinforcements, an alignment step of arranging the shear reinforcement bars in an upright state at predetermined intervals; an inserting step of inserting a plurality of the main reinforcements into the arranged shear reinforcement bars; a reinforcing bar arrangement process in which a plurality of stands, which may be liftable, on which the inserted main reinforcements are placed in a spanning state and the shear reinforcement are moved relative to each other in the vertical direction, and the main reinforcement is arranged at a predetermined position within the shear reinforcement; The present invention is characterized by the following features.

[0012] According to the above configuration, by inserting the main reinforcement bars into the positioned shear reinforcement bars and arranging them in the predetermined positions, it is possible to assemble a reinforcing bar cage with accurate spacing of the shear reinforcement bars. There is no need to align the shear reinforcement bars hanging from the main reinforcement bars on top of the main reinforcement bars during assembly, which improves the workability of assembling the reinforcing bar cage. Furthermore, there is no need to mark the placement positions of the shear reinforcement bars on the main reinforcement bars, which reduces the labor and time required for assembly.

[0013] 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, and the plurality of frames include a first frame that can be raised and lowered for arranging the first main reinforcements, The reinforcement arrangement process includes raising the first frame to lift the first main reinforcement and arranging it inside the upper edge portion, and then arranging the second main reinforcement within the shear reinforcement other than on the inside of the upper edge portion. According to the above configuration, the first main reinforcement is brought close to the inside of the upper edge portion of the shear reinforcement from below using the first frame, making it easier to arrange the first main reinforcement and also easier to bind the first main reinforcement and the shear reinforcement together.

[0014] 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, and the plurality of mounting frames include a first mounting frame for arranging the first main reinforcements, In the alignment process, the shear reinforcement bars are arranged on a reinforcing bar arrangement rack that can be raised and lowered. The reinforcement step includes arranging the main reinforcement bars placed on the frame among the shear reinforcement bars arranged side by side on the reinforcement rack by raising and lowering the reinforcement rack. According to the above configuration, the reinforcing bar rack on which the shear reinforcement bars are arranged is raised and lowered, so that the main reinforcement bars can be arranged within the shear reinforcement bars at a constant height.

[0015] Preferably, the plurality of frames include a second frame for disposing the second main reinforcement, The reinforcing bar arrangement step includes relatively moving the second frame and the shear reinforcement bar in the vertical direction, and arranging the second main reinforcement bar placed on the second frame in the shear reinforcement bar. According to the above configuration, the second main reinforcement can be held by the second frame, and the relative movement between the second frame and the shear reinforcement allows the second main reinforcement to be held at its position within the shear reinforcement. Therefore, even second main reinforcement including upper two-stage reinforcement and lower two-stage reinforcement can be held without manual intervention.

[0016] Preferably, the reinforcement arrangement process includes suspending the shear reinforcement from the first main reinforcement placed on the first frame and arranged inside the upper edge of the shear reinforcement, and moving the shear reinforcement relative to the second frame in the vertical direction, thereby arranging the second main reinforcement placed on the second frame within the shear reinforcement. According to the above configuration, the first main reinforcement is lifted by the first frame or the reinforcement rack is lowered to hang the shear reinforcement, and the second main reinforcement is arranged inside the shear reinforcement with the lower part open, which makes the work of arranging the second main reinforcement easy.

[0017] Preferably, the inserting step includes inserting a plurality of the main reinforcements into the shear reinforcement bars arranged side by side at the same height position. According to the above configuration, the workability of inserting the main reinforcement bars into the shear reinforcement bars can be improved.

[0018] Preferably, the reinforcing bar cage has a step in the middle of the longitudinal direction, the plurality of main reinforcements include bent main reinforcements bent in a crank shape at the middle of the longitudinal direction, and the plurality of shear reinforcements are formed to have different sizes depending on the position of the reinforcing bar cage in the longitudinal direction, The aligning step includes arranging the shear reinforcement bars of a first size in a first region in the alignment direction, and arranging the shear reinforcement bars of a second size in a second region adjacent to the first region, The inserting step includes inserting the folded main reinforcement bars into the shear reinforcement bars of different sizes arranged side by side, The plurality of stands on which the inserted bent main reinforcements are placed can be set at different placement height positions in accordance with the shapes of the bent main reinforcements. According to the above configuration, by changing the mounting height position of the stand in accordance with the shape of the bent main reinforcement bars inserted into the arranged shear reinforcement bars, a reinforcing bar cage with steps can be assembled while stabilizing the bent main reinforcement bars placed on the stand.

[0019] Another aspect of the present invention is a reinforcing bar cage assembling device for assembling a reinforcing bar cage having a plurality of main reinforcements having portions extending parallel to each other and a plurality of frame-shaped shear reinforcements surrounding these 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 reinforcement rack provided to extend linearly and on which a plurality of the shear reinforcements are arranged in an upright state at predetermined intervals; and a plurality of stands that are provided along the reinforcing bar rack and on which the main reinforcements inserted into the shear reinforcements arranged side by side on the reinforcing bar rack can be placed in a spanning state, the plurality of cradles include a first cradle for disposing the first main reinforcement, and each cradle has a main reinforcement holding part that extends in a direction intersecting the extending direction of the reinforcement rack and on which the main reinforcement is placed, and that may be liftable; The main reinforcement holding portion of the first frame is characterized in that it is capable of lifting the first main reinforcement thereon to at least the inside of the upper edge portion of the shear reinforcement. According to the above configuration, the first main reinforcement bars inserted into the shear reinforcement bars arranged side by side on the reinforcement rack can be raised to the inside of the upper edge of the shear reinforcement bars by the main reinforcement holding part of the first frame, making it easier to arrange the first main reinforcement bars and improving the workability of assembling the reinforcing bar cage. The shear reinforcement bars are positioned, and a reinforcing bar cage with accurate spacing can be assembled.

[0020] A reinforcing bar cage assembling device according to yet another aspect of the present invention is a device for assembling a reinforcing bar cage having a plurality of main reinforcements having portions extending parallel to each other and a plurality of frame-shaped shear reinforcements surrounding these 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 on the inside of the upper edge portions, a reinforcement rack provided to extend linearly and on which a plurality of the shear reinforcements are arranged in an upright state at predetermined intervals; and a plurality of stands that are provided along the reinforcing bar rack and on which the main reinforcements inserted into the shear reinforcements arranged side by side on the reinforcing bar rack can be placed in a spanning state, the plurality of cradles include a first cradle for disposing the first main reinforcement, and each cradle has a main reinforcement holding part that extends in a direction intersecting the extending direction of the reinforcement rack and on which the main reinforcement is placed, and that may be liftable; The reinforcement rack is characterized in that it can be raised and lowered so that the height position of the main reinforcement placed on the main reinforcement holding portion of the frame matches the height position of the main reinforcement in the shear reinforcement arranged side by side on the reinforcement rack. According to the above configuration, each main reinforcement bar placed on the main reinforcement holding part of the frame can be arranged inside the shear reinforcement bar by raising and lowering the reinforcing bar arrangement rack on which the shear reinforcement bars are arranged. This allows the main reinforcement bars to be arranged inside the shear reinforcement bar at a constant height.

[0021] Preferably, the plurality of frames include a second frame for disposing the second main reinforcement, The main reinforcement holding portion of the second frame and the shear reinforcement are relatively movable in the vertical direction. According to the above configuration, the second main reinforcement can be held by the main reinforcement holding part of the second frame, which is movable vertically relative to the shear reinforcement, and can be arranged inside the shear reinforcement, making it easier to arrange the second main reinforcement and improving the workability of assembling the reinforcing bar cage.It can also accommodate second main reinforcement including upper two-stage reinforcement and lower two-stage reinforcement.

[0022] Preferably, by moving the main reinforcement holding portion of the first frame, on which the first main reinforcement arranged inside the upper edge portion of the shear reinforcement is placed, relative to the reinforcement rack on which the shear reinforcement is arranged in a row in the vertical direction, the shear reinforcement can be suspended from the first main reinforcement and removed from the reinforcement rack. According to the above configuration, the second main reinforcement on the second frame is arranged inside the shear reinforcement hanging from the first main reinforcement on the main reinforcement holding part of the first frame and moving away from the reinforcement rack. The second main reinforcement can be easily arranged inside the shear reinforcement that has been removed from the reinforcement rack and has its lower part exposed.

[0023] Preferably, the reinforcement rack is provided with a main reinforcement feed roller that is provided above the reinforcement rack, extends in a direction intersecting the extension direction of the reinforcement rack, is rotatable around an axis, and carries the main reinforcement to be inserted into the shear reinforcement bars arranged side by side on the reinforcement rack. According to the above configuration, when inserting the main reinforcement into the shear reinforcement arranged in a reinforcement rack, the movement of the main reinforcement in the extension direction of the reinforcement rack is assisted by the main reinforcement feed rollers, thereby reducing the labor required to feed the main reinforcement. The main reinforcement feed rollers also prevent interference between the main reinforcement and the reinforcement rack or shear reinforcement. The first and second main reinforcement are inserted into the shear reinforcement at the same height as the main reinforcement feed rollers, improving the ease of inserting the main reinforcement into the shear reinforcement.

[0024] Preferably, the reinforcing bar cage has a step in the middle of its longitudinal direction, the plurality of main reinforcements include bent main reinforcements bent in a crank shape at the middle of its longitudinal direction, and the plurality of shear reinforcements arranged in the reinforcement rack include shear reinforcements of a first size placed in a first region of the reinforcement rack and shear reinforcements of a second size placed in a second region adjacent to the first region, The main reinforcement holding portions of the plurality of cradles can be set at different mounting height positions in accordance with the shapes of the bent main reinforcements. According to the above configuration, the bent main bars are placed in a stable state on the main bar holding parts whose placement heights are varied according to the shape of the bent main bars, which makes it easy to assemble a reinforcing bar cage with steps. [Effects of the Invention]

[0025] According to the present invention, the workability of assembling a reinforcing bar cage can be improved, and the quality of the assembled reinforcing bar cage can be improved. [Brief explanation of the drawings]

[0026] [Figure 1] 1A and 1B are diagrams showing a reinforcing bar cage assembling device according to a first embodiment of the present invention, in which (A) is a plan view and (B) is a front view. [Figure 2] FIG. [Figure 3] 3A is an enlarged front view of the assembly device, (B) is an enlarged view of a circle B in FIG. 3A, and (C) is an enlarged view of a circle C in FIG. [Figure 4] 4(A) is an enlarged side view of the assembly device, and FIG. 4(B) is an enlarged view of the circle B in FIG. [Figure 5] 5A and 5B are schematic diagrams showing the assembly process of a reinforcing bar cage using the same assembly device, in which (A) is a front view of the state in which all main reinforcement retaining parts are positioned at the bottom, (B) is a view from the arrow B in Figure 5A, (C) is a front view of the state in which shear reinforcement bars are arranged in a reinforcement rack, and (D) is a view from the arrow D in Figure 5C. [Figure 6] 6A and 6B are schematic diagrams showing the assembly process, in which (A) is a front view of the state in which the first main reinforcement has been inserted into the shear reinforcement, (B) is a view taken along arrow B in Fig. 6A, (C) is a front view of the state in which the first main reinforcement (upper end main reinforcement) has been placed inside the upper edge of the shear reinforcement due to the rise of the main reinforcement holding part of the first frame, and (D) is a view taken along arrow D in Fig. 6C. [Figure 7] 7A and 7B are schematic diagrams showing the assembly process, in which (A) is a front view of the state in which the second main reinforcement is inserted into the shear reinforcement, (B) is a view from the arrow B in Figure 7A, and (C) is a view from the arrow C in Figure 7A. [Figure 8] 8(A) and 8(C) are schematic diagrams showing the assembly process, in which (A) is a front view of the state in which the second main reinforcement has been moved close to the first main reinforcement by raising the main reinforcement holding part of the second frame, (B) is a view seen from the arrow B in FIG. 8(A), and (C) is a view seen from the arrow C in FIG. 8(A). [Figure 9] 9(A) and 9(C) are schematic diagrams showing the assembly process, in which (A) is a front view of the state in which the main reinforcement holding part of the first frame has been further raised and the shear reinforcement has been suspended, (B) is a view from the arrow B in FIG. 9(A), and (C) is a view from the arrow C in FIG. 9(A). [Figure 10] 10(A) and 10(C) are schematic diagrams showing the assembly process, in which (A) is a front view of the main reinforcement holding part of the second frame in the middle of lowering, (B) is a view seen from the arrow B in FIG. 10(A), and (C) is a view seen from the arrow C in FIG. 10(A). [Figure 11]11(A) and 11(C) are schematic diagrams showing the assembly process, in which (A) is a front view of the second frame with the main reinforcement holding part lowered to the bottom, (B) is a view seen from the arrow B in FIG. 11(A), and (C) is a view seen from the arrow C in FIG. 11(A). [Figure 12] This figure explains the reinforcing process of the second main reinforcement (upper two-stage reinforcement) in the same assembly process, viewed from the longitudinal direction of the reinforcing bar cage. (A) shows the state in which a U-shaped jig is hooked onto the first main reinforcement, (B) shows the state in which the upper two-stage reinforcement is positioned by the rising U-shaped jig, and (C) shows the state in which the U-shaped jig has finished rising. [Figure 13] This figure explains the reinforcing process of the second main reinforcement (lower two-stage reinforcement) in the same assembly process, viewed from the longitudinal direction of the reinforcing bar cage. (A) shows the state in which a U-shaped jig is restrained at the lower edge of the shear reinforcement, (B) shows the state in which the lower two-stage reinforcement is positioned by the U-shaped jig as the main reinforcement holding part of the second frame is lowered, and (C) shows the state in which the second main reinforcement (lower end main reinforcement) is placed inside the lower edge of the shear reinforcement as the main reinforcement holding part of the second frame is lowered. [Figure 14] FIG. 6 is a front schematic view showing a reinforcing bar cage assembling device according to a second embodiment of the present invention. [Figure 15] 10(A) to 10(E) are diagrams illustrating the assembly process of the reinforcing bar cage according to the embodiment, as viewed from the longitudinal direction of the reinforcing bar cage. [Figure 16] 10(A) to 10(E) are diagrams illustrating the assembly process of a reinforcing bar cage according to a third embodiment of the present invention, as viewed from the longitudinal direction of the reinforcing bar cage. [Figure 17] FIG. 10 is a front schematic view showing a reinforcing bar cage assembling device according to a fourth embodiment of the present invention. [Figure 18] 10(A) to 10(D) are diagrams illustrating the assembly process of the reinforcing bar cage according to the embodiment, as viewed from the longitudinal direction of the reinforcing bar cage. [Figure 19] 10(A) to 10(D) are diagrams illustrating the assembly process of a reinforcing bar cage according to a fifth embodiment of the present invention, as viewed from the longitudinal direction of the reinforcing bar cage. [Figure 20] FIG. 10 is a schematic front view showing a reinforcing bar cage assembling device according to a sixth embodiment of the present invention. [Figure 21]10(A) to 10(E) are diagrams illustrating the assembly process of the reinforcing bar cage according to the embodiment, as viewed from the longitudinal direction of the reinforcing bar cage. [Figure 22] 13(A) to 13(C) are diagrams illustrating the assembly process of a reinforcing bar cage according to a seventh embodiment of the present invention, and are views of the reinforcing bar cage as seen from the front. [Figure 23] 10(A) to 10(C) are diagrams illustrating the assembly process, showing the reinforcing bar cage as viewed from the front. [Figure 24] 13(A) and 13(B) are diagrams illustrating the assembly process of a reinforcing bar cage according to an eighth embodiment of the present invention, and are views of the reinforcing bar cage as seen from the front. [Figure 25] 13(A) to 13(D) are diagrams illustrating the assembly process of a reinforcing bar cage according to a ninth embodiment of the present invention, and are views of the reinforcing bar cage as seen from the front. [Figure 26] 10(A) to 10(C) are diagrams illustrating the assembly process, showing the reinforcing bar cage as viewed from the front. [Figure 27] FIG. 19 is a diagram illustrating the assembly process of a reinforcing bar cage according to a tenth embodiment of the present invention, showing the reinforcing bar cage as viewed from the front. DETAILED DESCRIPTION OF THE INVENTION

[0027] First Embodiment A first embodiment of the present invention will be described with reference to the drawings. In this embodiment, the present invention is applied to an assembly device and an assembly method for pre-assembling reinforcing bars of beams in concrete structures. Below, the reinforcing bars, the assembly device, its peripheral structures, and the assembly method will be described in that order.

[0028] [Rebar cage] 11, the reinforcing bar cage Cg of the beam assembled by the assembly device 1A has a plurality of main reinforcements 10 extending parallel to one another 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 20a, left and right side edges 20b and 20c, and a lower edge 20d, and are arranged at predetermined intervals in the longitudinal direction of the main reinforcement bars 10.

[0029] The main reinforcement 10 includes an upper end main reinforcement 11, an upper two-stage reinforcement 12, a lower end main reinforcement 13, and a lower two-stage reinforcement 14, and each is tied to the shear reinforcement 20 by a metal wire or the like. A plurality of upper end main reinforcements 11 (five in FIG. 11) are arranged at equal intervals inside the upper edge portion 20a of the shear reinforcement 20. The upper two-stage reinforcements 12 are arranged along the inside of the left and right side edge portions 20b, 20c of the shear reinforcement 20 at a predetermined interval downward from the upper end main reinforcement 11.

[0030] A plurality of lower end main reinforcements 13 (five in FIG. 11) are arranged at equal intervals inside the lower edge portion 20d of the shear reinforcement 20. The lower two-stage reinforcements 14 are arranged along the inside of the side edge portions 20b, 20c of the shear reinforcement 20 at a predetermined interval above the lower end main reinforcement 13. In this description, the upper end main reinforcement 11, which is the main reinforcement arranged inside the upper edge portion 20a of the shear reinforcement 20, is referred to as the first main reinforcement, and the upper two-stage reinforcement 12, lower end main reinforcement 13 and lower two-stage reinforcement 14, which are the main reinforcements arranged within the shear reinforcement 20 other than the inside of the upper edge portion 20a, are referred to as the second main reinforcement.

[0031] [Assembly equipment] 1, the assembly device 1A for assembling the reinforcing bar cage Cg has a reinforcing bar rack 30, a plurality of main stands 40 (first stands), a plurality of sub stands 50 (second stands), and a main reinforcing bar feed table 60. Around the assembly device 1A, a scaffolding 2, a main reinforcing bar supply table 3, and a stopper stand 4 are provided as peripheral structures.

[0032] (Reinforcement rack) The reinforcement rack 30 is used to arrange the shear reinforcement bars 20 in an upright position at predetermined intervals during the assembly process of the reinforcing bar cage Cg, and as shown in Figures 2 to 4, has a bottom support portion 31 that supports the bottom edge portion 20d of the shear reinforcement bar 20, and a side support portion 35 that supports the side edge portions 20b, 20c of the shear reinforcement bar 20.

[0033] As shown in Figure 4(B), the lower support portion 31 has a pair of lower support members 32, 32 made of L-shaped cross-section steel material extending in the longitudinal direction of the reinforcing bar cage Cg and parallel to each other, and a plurality of horizontal base portions 33 supporting these lower support members 32 from below and extending in the transverse direction.

[0034] The corners of the lower support members 32, 32 face outward and upward. As shown in Figure 3, the vertical wall of each lower support member 32 is formed with engagement grooves 32a (retaining portions) for receiving the lower edge portions 20d of the shear reinforcement bars 20, and multiple engagement grooves 32a are arranged at predetermined intervals in the longitudinal direction of the lower support member 32. The engagement grooves 32a of adjacent lower support members 32, 32 are formed at the same position in the longitudinal direction.

[0035] The horizontal bases 33 are spaced apart in the longitudinal direction of the lower support member 32, and both ends of each horizontal base 33 are supported by a pair of small supports 34, 34 facing each other in the width direction of the lower support members 32, 32, as shown in Figure 4(B). The height of the horizontal base 33 can be adjusted by height adjustment means 34a provided between the end of the horizontal base 33 and the small supports 34, and therefore the height of the lower support members 32, 32 can also be adjusted.

[0036] 4(B) and another pair of small supports 34, 34 arranged adjacent to the pair of small supports 34 in the longitudinal direction of the lower support member 32 as shown in FIG. 3(A), that is, two pairs of small supports 34, 34 arranged adjacent to the pair of small supports 34 in the longitudinal direction of the assembly device 1A, form a small support unit 34U. As shown in FIGS. 2 and 3, a plurality of small support units 34U (nine in this embodiment) are arranged at equal intervals in the longitudinal direction of the lower support member 32.

[0037] As shown in Figure 4(B), the side support portion 35 has a pair of side support members 36, 36 made of L-shaped cross-section steel material that extend in the longitudinal direction of the assembly device 1A and are parallel to each other, and a plurality of pillar portions 37 that support these side support members 36 and extend in the vertical direction.

[0038] The corners of a pair of opposing side supports 36, 36 face inward. The upper ends of the columns 37, 37 are fixed to the vertical walls of the side supports 36, 36, and the horizontal walls of the side supports 36, 36 are each formed with engagement grooves 36a (retaining portions) for receiving the side portions 20b, 20c of the shear reinforcement 20, as shown in Figure 2, and a plurality of these are arranged at predetermined intervals along the longitudinal direction of the side support 36. The longitudinal position of each engagement groove 36a coincides with the longitudinal position of the engagement groove 32a of the bottom support 32.

[0039] As shown in Fig. 3, the pillars 37 are spaced apart in the longitudinal direction of each side support member 36, and the longitudinal positions of the pillars 37 of each pair of side supports 36 are the same. The lower ends of a pair of pillars 37 at the same longitudinal position are supported by a base 38 extending perpendicular to the longitudinal direction of the side support member 36, as shown in Fig. 4(B). The position of the pillars 37 can be adjusted in the direction perpendicular to the longitudinal direction of the side support member 36 (width direction) by width adjustment means 38a provided between the lower ends and the base 38, and therefore the positions of the side supports 36, 36 can be adjusted in the width direction.

[0040] The side edges 20b, 20c of the shear reinforcement bars 20 are respectively received in the engaging grooves 36a, 36a of the side support members 36, and the bottom edge 20d is received in the engaging groove 32a of the bottom support member 32, so that the shear reinforcement bars 20 are detachably held in an upright state in the reinforcing bar rack 30. The engaging grooves 32a, 36a can be selected arbitrarily to arrange the shear reinforcement bars 20 at a predetermined interval. Furthermore, because the positions of the bottom support members 32 and the side support members 36 can be adjusted, the reinforcing bar rack 30 can accommodate shear reinforcement bars 20 of different sizes, and therefore, can accommodate pre-assembled reinforcing bar cages Cg of different sizes.

[0041] (Main frame) The main frames 40 (first frames) are used to place and lift the upper main reinforcements 11 during the assembly process of the reinforcing bar cage Cg, and as shown in Figures 2 and 3, a plurality of main frames 40 are provided along the reinforcement rack 30, five of which are provided in this embodiment. The positions of the main frames 40 in the longitudinal direction of the reinforcement rack 30 correspond to the odd-numbered small support units 34U. In this description, a base on which the first main reinforcement is placed in order to arrange the first main reinforcement in the shear reinforcement 20 is referred to as a first frame.

[0042] Each main frame 40 has a pair of support columns 41, 41, and a main reinforcement restraint 42 (main reinforcement holding section) that is supported by these support columns 41 and on which the upper end main reinforcement 11 is placed. The main reinforcement restraint 42 is formed from a bar material, and as shown in Fig. 3(B) , in this embodiment it is formed from a square pipe, but it may also be a square bar, a round pipe, a round bar, or a roller.

[0043] As shown in Figures 2 and 4(A), the pair of support columns 41, 41 are arranged close to the reinforcement rack 30 and face each other in a direction perpendicular to the longitudinal direction of the reinforcement rack 30, sandwiching the reinforcement rack 30 therebetween. Each support column 41 is provided with a lifting section 43 that is movable in the up and down direction. The lifting section 43 is driven by converting the rotational motion of a motor 44, which is arranged near one of the pair of support columns 41, 41, into up and down motion via a transmission mechanism 45.

[0044] The pair of lifting units 43, 43 can be raised and lowered simultaneously to the same height. As shown in Fig. 3(A), a stop 41a that prevents the lifting unit 43 from descending is provided at the lower end of each support column 41. The lifting unit 43 is at its lowest position when it is at the position of the stop 41a.

[0045] As shown in FIG. 3(B), each lifting section 43 has a placement section receiving section 43a consisting of a rectangular through-hole at one end and the other end in the longitudinal direction of the reinforcement rack 30. The placement section receiving section 43a may be formed as a U-shaped groove. The placement section receiving section 43a extends in the opposing direction of the support sections 41. The main reinforcement placement sections 42 are detachably attached to the placement section receiving sections 43a facing each other in the opposing direction. Therefore, the main reinforcement placement sections 42 are supported by the lifting section 43, and are therefore supported by the support sections 41 so that they can be raised and lowered. Note that when the main reinforcement placement sections 42 are formed as rollers, their both ends are axially supported by the placement section receiving sections 43a and rotatable, thereby assisting the movement of the placed main reinforcement 10. As shown in FIG. 1(B), the upper end main reinforcements 11 are placed and held on the main reinforcement restraints 42 of the five main frames 40 so as to span across them in the crossing direction.

[0046] (Sub-stand) The sub-mounts 50 (second mounts) are used to place and lift the main reinforcements 10 other than the upper main reinforcements 11 during the assembly process of the reinforcing bar cage Cg, i.e., the second main reinforcements, i.e., the upper two-stage reinforcements 12, the lower main reinforcements 13, and the lower two-stage reinforcements 14. As shown in Figures 2 and 3, a plurality of sub-mounts 50 are provided along the reinforcement rack 30, and four are provided in this embodiment. The positions of the sub-mounts 50 in the longitudinal direction of the reinforcement rack 30 correspond to the even-numbered small support units 34U, and are between the adjacent main mounts 40, 40. In this description, a stand on which the second main reinforcement is placed in order to arrange the second main reinforcement in the shear reinforcement 20 is referred to as a second frame.

[0047] Each sub-frame 50 has a pair of support columns 51, 51, and a main reinforcement placing section 52 (main reinforcement holding section) supported by these support columns 51 and on which the upper two-stage reinforcement 12, the lower end main reinforcement 13, and the lower two-stage reinforcement 14 are placed. The main reinforcement placing section 52 is formed from a rod material, and as shown in Figure 3(C) , in this embodiment it is formed from a square bar, but it may also be a square pipe, a round pipe, a round bar, or a roller.

[0048] As shown in Fig. 2, the pair of support columns 51, 51 are arranged close to the reinforcement rack 30 and face each other in a direction perpendicular to the longitudinal direction of the reinforcement rack 30, sandwiching the reinforcement rack 30 therebetween. Each support column 51 is provided with a lifting section 53 that is movable in the up and down direction. The lifting section 53 is driven by converting the rotational motion of a motor 54, which is arranged near one of the pair of support columns 51, 51, into up and down motion via a transmission mechanism 55 (see Fig. 4(A)).

[0049] The pair of lifting units 53, 53 can be raised and lowered simultaneously to the same height. As shown in Figures 3(A) and (C), a stopper 51a that prevents the lifting unit 53 from descending is provided at the lower end of each support unit 51. The lifting unit 53 is at its lowest position when it is at the position of the stopper 51a.

[0050] As shown in FIG. 3(C), each lifting section 53 has a placement section receiving section 53a formed as a U-shaped groove opening upward at one end and the other end in the longitudinal direction of the reinforcement rack 30. The placement section receiving section 53a may be formed as a through-hole. The placement section receiving section 53a extends in the opposing direction of the support sections 51. The main reinforcement placement sections 52 are detachably attached to the placement section receiving sections 53a facing each other in the opposing direction. Therefore, the main reinforcement placement sections 52 are supported by the lifting section 53, and are therefore supported by the support sections 51 so that they can be raised and lowered. Note that when the main reinforcement placement sections 52 are formed as rollers, their both ends are rotatably supported by the placement section receiving sections 53a, 53a, thereby assisting the movement of the placed main reinforcement 10. The upper two-stage reinforcement 12, the lower end main reinforcement 13, and the lower two-stage reinforcement 14 are placed and held on the main reinforcement placing portions 52 of the four sub-frames 50 so as to span across in the intersecting direction. 1(B) and 3 may be provided between the upper ends of the support column 41 of the main gantry 40 and the support column 51 of the sub-gantry 50. As shown in FIG.

[0051] (Main reinforcement slide) The main reinforcement feed table 60 supports the main reinforcement 10 and assists in the movement of the main reinforcement 10 in the longitudinal direction of the reinforcement rack 30 when the main reinforcement 10 is inserted into the shear reinforcement 20 held in the engagement grooves 32a, 36a of the reinforcement rack 30 during the assembly process of the reinforcing bar cage Cg.

[0052] As shown in FIG. 4(B), the main reinforcing bar feed table 60 includes the small support column unit 34U and a main reinforcing bar feed roller 61. The main reinforcing bar feed roller 61 extends in a direction intersecting the longitudinal direction of the reinforcement rack 30 and is provided so as to span above each pair of small supports 34, 34 that make up the small support column unit 34U. That is, as shown in FIG. 2, two main reinforcing bar feed rollers 61 are provided for each small support column unit 34U, and are therefore provided at positions corresponding to the main base 40 and sub-base 50. Both longitudinal ends of each main reinforcing bar feed roller 61 are rotatably supported by brackets 34b provided at the upper ends of the small supports 34 shown in FIG. 4(B). One, three, or more main reinforcing bar feed rollers 61 may be provided for each small support column unit 34U.

[0053] As shown in Figure 4 (B), the main reinforcement feed roller 61 is positioned above the lower edge support portion 31 of the reinforcement rack 30, so that when the main reinforcement 10 is assisted in its movement by the main reinforcement feed roller 61, it does not interfere with the lower edge portion 20d of the shear reinforcement 20 held by the reinforcement rack 30 or the lower edge support portion 31 of the reinforcement rack 30. 3(A), the main reinforcing bar feeding rollers 61 are located at a higher position than the main reinforcing bar placing section 52 of the sub-frame 50 when the lifting section 53 is at the lowest position, and are also located at a higher position than the main reinforcing bar placing section 42 when the lifting section 43 of the main frame 40 is at the lowest position. All the main reinforcing bar feeding rollers 61 are set at the same height position.

[0054] 2, in a plan view, the small support unit 34U and its two main reinforcement feed rollers 61 are arranged between the two main reinforcement placing parts 42 of the main frame 40 and between the two main reinforcement placing parts 52 of the sub-frame 50. Therefore, when the main reinforcement placing parts 42, 52 move up and down, they do not interfere with the small support unit 34U and the main reinforcement feed rollers 61 of the main reinforcement feed table 60.

[0055] [scaffold] The scaffolding 2 shown in Figure 1 is used as a work space for workers during the process of assembling the reinforcing bar cage Cg, such as when arranging the shear reinforcement bars 20 on the reinforcement rack 30, when arranging the main reinforcement bars 10 at predetermined positions within the shear reinforcement bars 20, and when binding the shear reinforcement bars 20 and the main reinforcement bars 10 together.

[0056] The scaffolding 2 has a plank scaffolding 2a installed to the side of the reinforcement rack 30, and a lattice scaffolding 2b installed above the reinforcement rack 30 so as to straddle the plank scaffolding 2a. Shear reinforcement 20 is inserted through the gaps in the lattice scaffolding 2b and held in place by the reinforcement rack 30. At this time, the lattice scaffolding 2b can support the left and right side edges 20b, 20c of the shear reinforcement 20, and if a tangential bar is installed between the upper edge 20a and lower edge 20b of the shear reinforcement 20, it can also support this tangential bar.

[0057] [Main reinforcement supply stand] The main reinforcing bar supply stand 3 shown in Fig. 1 temporarily places the main reinforcing bars 10 of the reinforcing bar cage Cg and sends the main reinforcing bars 10 to the assembly device 1A during the assembly process of the reinforcing bar cage Cg. The main reinforcing bar supply stand 3 is provided near the extension direction of the reinforcement rack 30. The main reinforcing bar supply stand 3 has a temporary placement section 3a and a supply section 3d.

[0058] The temporary storage section 3a has a pair of frames 3b, 3b extending in the same direction as the reinforcement rack 30, and rollers 3c are placed between the frames 3b, 3b in the longitudinal direction of the frames 3b, 3b. Both ends of each roller 3c are journaled by the frames 3b, 3b and are rotatable.

[0059] The supply section 3d is arranged parallel to the temporary storage section 3a and has a pair of frames 3e, 3e parallel to the frames 3b, 3b, with adjacent frames 3b and 3e fixed together. A plurality of rollers 3f are placed between the frames 3e, 3e in the longitudinal direction of the frames 3e, 3e. Both ends of each roller 3f are pivotally supported by the frames 3e, 3e, allowing it to rotate.

[0060] The supply unit 3d is disposed on an extension line of the reinforcement rack 30. The supply unit 3d and the temporary storage unit 3a are supported by legs 3g shown in Fig. 1(B) and are set at the same height as the main reinforcement feed rollers 61 of the assembly device 1A.

[0061] At the main reinforcement supply table 3, the main reinforcement 10 temporarily placed in the temporary storage section 3a is transferred to the supply section 3d, and then sent from the supply section 3d to the assembly device 1A. The temporary storage section 3a and the supply section 3d are adjacent and at the same height, making it easy to transfer the main reinforcement 10. In addition, the work of sending the main reinforcement 10 from the supply section 3d to the assembly device 1A is assisted by the rollers 3f and the main reinforcement feed roller 61, making the work easy.

[0062] [Stopper stand] The stopper stand 4 shown in Fig. 1 is used to position the main reinforcement bars 10 sent from the main reinforcement supply table 3 to the assembly device 1A in the longitudinal direction of the reinforcing bar cage Cg. The stopper stand 4 is installed near the extension direction of the reinforcing bar rack 30, on the opposite side from the main reinforcement supply table 3. The plate surface of the stopper stand 4 faces the extension direction of the reinforcing bar rack 30. The main reinforcement bars 10 sent from the main reinforcement supply table 3 to the assembly device 1A are positioned by abutting against the stopper stand 4.

[0063] [How to assemble a rebar cage] A method for assembling a reinforcing bar cage Cg using the assembly device 1A configured as described above will be described with reference to schematic diagrams of the process shown in Figures 5 to 11. Note that the assembly device 1A shown in Figures 5 to 11 has four main frames 40 and three sub-frames 50, and the main reinforcement placing sections 42 and 52 of the main frames 40 and sub-frames 50 are formed from round pipes, and the placing section receiving section 43a of the main frame 40 is formed from a U-shaped groove. As shown in FIGS. 5(A) and 5(B), before assembling the reinforcing bar cage Cg, the lifting sections 43 and 53 of the main frame 40 and the sub-frame 50 are all lowered to their lowest positions.

[0064] (Alignment of shear reinforcement and insertion of upper main reinforcement) First, as shown in FIGS. 5(C) and 5(D), the shear reinforcement bars 20 are arranged upright on the reinforcement rack 30 at predetermined intervals. Next, the upper end main reinforcement 11 (first main reinforcement) is sent from the main reinforcement supply table 3 (see Figure 1) to the assembly device 1A, and as shown in Figures 6(A) and (B), it is inserted into each shear reinforcement 20, moved over the main reinforcement feed roller 61, and brought into contact with the stopper stand 4.

[0065] (Lifting and placement of upper main reinforcement) 6(C) and (D), the main reinforcement restraints 42 of the main frame 40 are raised, and the upper main reinforcement 11 is placed on the main reinforcement restraints 42 and raised to the inside of the upper edge 20a of the shear reinforcement 20. Then, the upper main reinforcement 11 is arranged at a predetermined position in the width direction of the shear reinforcement 20 and tied to the shear reinforcement 20.

[0066] (Insertion of double-stage reinforcement and bottom main reinforcement) Next, the upper two-stage reinforcement 12, the lower end main reinforcement 13, and the lower two-stage reinforcement 14 as the second main reinforcement are sent from the main reinforcement supply table 3 to the assembly device 1A, and as shown in Figure 7, they are inserted into each shear reinforcement 20, moved on the main reinforcement feed roller 61, and abutted against the stopper stand 4.

[0067] (Lifting of double-level reinforcement and bottom main reinforcement) Next, as shown in Figure 8, the main reinforcement restraints 52 of the sub-frame 50 are raised, and with the upper two-stage reinforcements 12, lower end main reinforcements 13, and lower two-stage reinforcements 14 placed on the main reinforcement restraints 52, the sub-frame 50 is raised to a position slightly above the installation height of the upper two-stage reinforcements 12 within the shear reinforcement 20. Next, the upper two-stage reinforcements 12 are aligned along the side edges 20b, 20c of the shear reinforcement 20.

[0068] (Hanging of shear reinforcement) Next, as shown in Figure 9, the main reinforcement restraints 42 of the main frame 40 are further raised, the shear reinforcement 20 is hung from the upper end main reinforcement 11 on the main reinforcement restraints 42, and the shear reinforcement 20 is removed from the reinforcement rack 30. This removal releases the lower part of the shear reinforcement 20, making it easier to install the lower end main reinforcement 13 and the lower two-stage reinforcement 14.

[0069] (Installation of upper two-stage reinforcement using a jig) When the shear reinforcement 20 is being lifted and hung, the upper two-stage reinforcement 12 can be disposed within the shear reinforcement 20. The upper two-stage reinforcement 12 may be positioned using a U-shaped jig 5 as shown in Fig. 12. The jig 5 has a connecting part 5a and arms 5b and 5c extending perpendicularly from both ends of the connecting part 5a.

[0070] As shown in Figure 12(A), before raising the shear reinforcement 20, one arm 5b of the jig 5 is hooked onto the upper end main reinforcement 11, and the connecting part 5a is directed outward (towards the side of the side edge of the shear reinforcement 20). The other arm 5c is positioned at the same height as the upper two-stage reinforcement 12 of the shear reinforcement 20. Above the arm 5c, the upper two-stage reinforcement 12 is placed on the main reinforcement placing part 52 of the sub-frame 50, aligned with the side edge 20b of the shear reinforcement 20.

[0071] As shown in Figure 12(B), when the shear reinforcement 20 is raised, the placement position of the upper double-stage reinforcement 12 in the shear reinforcement 20 reaches the upper double-stage reinforcement 12 on the main reinforcement placement portion 52. At this time, the upper double-stage reinforcement 12 is positioned by being placed on the arm portion 5c, and the upper double-stage reinforcement 12 can be placed within the shear reinforcement 20. After placement, the upper double-stage reinforcement 12 is tied to the shear reinforcement 20, but as shown in Figure 12(C), it may also be tied after the shear reinforcement 20 has been raised.

[0072] (Installation of lower two-stage reinforcement using a jig) Next, as shown in Fig. 10, the main reinforcement placing portion 52 of the sub-frame 50 is lowered, and the lower two-stage reinforcement 14 is placed at a predetermined position within the shear reinforcement 20. The placement of the lower two-stage reinforcement 14 can also be positioned using a U-shaped jig 5, as shown in Fig. 13.

[0073] As shown in Figure 13(A), before the main reinforcement placing portion 52 is lowered, the lower two-stage reinforcement 14 placed there is aligned with the side edges 20b, 20c of the shear reinforcement 20. In addition, the arm 5c of the jig 5 is restrained at the bottom edge 20d of the shear reinforcement 20, with the connecting portion 5a facing outward (toward the side edges of the shear reinforcement 20). The position of the arm 5b is set at the installation height of the lower two-stage reinforcement 14 in the shear reinforcement 20. Above the arm 5b, the lower two-stage reinforcement 14 is placed on the main reinforcement placing portion 52 in a state where it is aligned with the side edges 20b of the shear reinforcement 20.

[0074] As shown in Figure 13(B), when the main reinforcement placing section 52 is lowered, the lower two-stage reinforcement 14 on the main reinforcement placing section 52 reaches the position where the lower two-stage reinforcement 14 will be placed in the shear reinforcement 20. At this time, the lower two-stage reinforcement 14 is positioned by being placed on the arm section 5b, and the lower two-stage reinforcement 14 can be placed within the shear reinforcement 20. After placement, the lower two-stage reinforcement 14 is tied to the shear reinforcement 20, but as shown in Figure 13(C), this can also be done after the main reinforcement placing section 52 has been lowered.

[0075] (Lower end main reinforcement) As shown in Figure 11, when the main reinforcement restraint 52 descends below the lower edge 20d of the shear reinforcement 20, the lower end main reinforcement 13 rests on the lower edge 20d, is arranged at a predetermined position in the width direction of the lower edge 20d, and is tied to the lower edge 20d. In this way, the reinforcing bar cage Cg is assembled. After that, a wire from a crane is hooked to the upper end main reinforcement 11 (both not shown), and the main reinforcement restraint 42 of the main frame 40 is removed, allowing the reinforcing bar cage Cg to be transported. Depending on the size of the reinforcing bar cage Cg, the wire hooking and the main reinforcement restraint 42 removal may be performed in the lowered position of the reinforcing bar cage Cg.

[0076] [Effects of the first embodiment] According to the above embodiment, the main reinforcements 10 are inserted into the shear reinforcement bars 20 arranged upright at predetermined intervals on the reinforcement rack 30 and arranged at predetermined positions, so that a pre-assembled reinforcing bar cage Cg can be assembled with accurate spacing between the shear reinforcement bars 20. Unlike the conventional technology, it is not necessary to arrange the shear reinforcement bars hanging from the main reinforcement bars at each position in the longitudinal direction of the main reinforcement bars, or to mark the arrangement positions of the shear reinforcement bars on the upper end main reinforcement bars, so that it is possible to improve workability and reduce the labor and time required in assembling the reinforcing bar cage Cg. According to the above embodiment, the upper end main reinforcement 11 is held by the main reinforcement placing portion 5 and lifted up to the inside of the upper edge portion 20a of the shear reinforcement 20, so that it is easy to arrange the upper end main reinforcement 11 inside the upper edge portion 20a and also easy to bind the upper end main reinforcement 11 and the shear reinforcement 20 together. According to the above embodiment, the upper two-stage reinforcement 12, the lower end main reinforcement 13, and the lower two-stage reinforcement 14 as the second main reinforcement are held and lifted by the main reinforcement placing part 52 of the second frame and arranged inside the shear reinforcement 20, which improves the workability of the second main reinforcement arrangement. This eliminates the need for manpower to hold the upper two-stage reinforcement and the lower two-stage reinforcement when arranging them, as in the prior art. According to the above embodiment, by hanging the shear reinforcement 20, the second main reinforcement (upper two-stage reinforcement 12, lower end main reinforcement 13, lower two-stage reinforcement 14) is arranged within the shear reinforcement 20 with the lower part of the shear reinforcement 20 left open, thereby improving the workability of installing the second main reinforcement. According to the above embodiment, all of the main reinforcements 10 are fed from the main reinforcement supply table 3 to the main reinforcement feed rollers 61 and inserted into the shear reinforcement 20. In other words, since the main reinforcements are inserted from the same height position, the workability of inserting the main reinforcements 10 into the shear reinforcement 20 can be improved. The main reinforcement feed rollers 61 assist the movement of the main reinforcements 10, which can reduce the labor required to feed the main reinforcement.

[0077] 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.

[0078] Second Embodiment 14 and 15 show a second embodiment of the present invention. In this embodiment, unlike the first embodiment, the main reinforcement bars are arranged while the shear reinforcement bars are placed on the reinforcement rack without being suspended.

[0079] In the assembly device 1B of this embodiment shown in Fig. 14, a slit 32b is formed in the lower support member 32 at a position corresponding to the main reinforcement placing portion 52 so that the main reinforcement placing portion 52 (main reinforcement holding portion) of the sub-frame 50 (second frame) can move below the lower support member 32 of the reinforcement rack 30. A slit 36b (not shown) that allows the main reinforcement placing portion 52 to pass through is also formed in the side support member 36 not shown in Fig. 14. Although not shown, in the assembly device 1B, a stopper 51a for preventing the lifting section 53 of the sub-stand 50 from descending is provided below the lower side support member 32.

[0080] The main reinforcement feed rollers 61 provided in the assembly apparatus 1A of the first embodiment are not provided in the assembly apparatus 1B to avoid interference with the lower end main reinforcements 13 and the lower two-stage reinforcements 14 placed on the downwardly moving main reinforcement placement part 52. In addition, as shown in Figure 15, the corners of the lower support members 32, 32 face inward and upward.

[0081] A method for assembling a reinforcing bar cage Cg using the assembling device 1B having the above configuration will be described with reference to FIG. 15 showing the assembling process. After aligning the shear reinforcement bars 20 on the reinforcement rack 30 as shown in Figure 15(A), the upper end main reinforcement 11 (first main reinforcement) is inserted into the shear reinforcement bars 20 and placed on the main reinforcement placement sections 42, 52 as shown in Figure 15(B).

[0082] Next, as shown in Figure 15(C), the upper main reinforcement 11 is lifted up to the inside of the upper edge part 20a of the shear reinforcement 20 by the main reinforcement placing part 42 and placed in a predetermined position. As shown in Figure 15(D), the upper two-stage reinforcement 12, the lower main reinforcement 13, and the lower two-stage reinforcement 14 (second main reinforcement) are inserted into the shear reinforcement 20 and placed on the main reinforcement placing part 52.

[0083] Then, the second main reinforcement including the upper two-stage reinforcement 12 is lifted by the main reinforcement placement section 52 to the installation height position of the upper two-stage reinforcement 12 within the shear reinforcement 20, and the upper two-stage reinforcement 12 is arranged on the side edge portions 20b, 20c of the shear reinforcement 20 as shown in Figure 15 (E).

[0084] Next, the main reinforcement placing section 52 is lowered, and the lower two-stage reinforcement 14 is arranged on the side edges 20b, 20c at the same height as the arrangement of the lower two-stage reinforcement 14 within the shear reinforcement 20. Furthermore, by lowering the main reinforcement placing section 52 below the bottom edge 20d of the shear reinforcement 20, the lower end main reinforcement 13 is placed on the bottom edge 20d and arranged in the specified position. In this way, the reinforcing bar cage Cg is assembled.

[0085] <Third embodiment> Fig. 16 shows a third embodiment of the present invention. In this embodiment, like the second embodiment, the main reinforcement bars are placed on the reinforcement rack without being suspended from the shear reinforcement bars. However, unlike the second embodiment, the upper two-stage reinforcement bars are placed by being held on the main reinforcement placement section of the main frame.

[0086] In this embodiment, an assembling device 1B (see FIG. 14) is used as in the second embodiment. A method for assembling the reinforcing bar cage Cg of this embodiment using the assembling device 1B will be described with reference to FIG. 16 showing the assembly process.

[0087] After aligning the shear reinforcement 20 in Figure 16(A), the upper end main reinforcement 11 (first main reinforcement) and the upper two-stage reinforcement 12 of the second main reinforcement are inserted into the shear reinforcement 20 as shown in Figure 16(B), and placed on the main reinforcement placing portion 42 of the main frame 40 and the main reinforcement placing portion 52 of the sub-frame 50.

[0088] Next, as shown in Figure 16(C), the main reinforcement restraints 42 lift the upper main reinforcements 11 and the upper two-stage reinforcements 12 up to the inside of the upper edge portion 20a of the shear reinforcement 20, and the upper main reinforcements 11 are placed in place. Then, the main reinforcement restraints 42 are lowered, and the upper two-stage reinforcements 12 are placed on the side edge portions 20b and 20c at the placement height within the shear reinforcement 20, as shown in Figure 16(D). Therefore, in this embodiment, the main frame 40 functions not only as the first frame but also as part of the second frame.

[0089] 16(D), the lower end main reinforcement 13 and the lower two-stage reinforcement 14, i.e., the remaining second main reinforcement, are inserted into the shear reinforcement 20 and placed on the main reinforcement placing portion 52. Then, as shown in FIG. 16(E), the main reinforcement placing portion 52 is lowered, and the lower two-stage reinforcement 14 is placed on the side edge portions 20b and 20c at the same height as the lower two-stage reinforcement 14 is placed in the shear reinforcement 20. Furthermore, by lowering the main reinforcement placing portion 52 below the lower edge portion 20d of the shear reinforcement 20, the lower end main reinforcement 13 is placed on the lower edge portion 20d and placed in the specified position.

[0090] <Fourth embodiment> 17 and 18 show a fourth embodiment of the present invention. In this embodiment, like the second and third embodiments, the second main reinforcement bars are arranged without hanging the shear reinforcement bars, but are placed on the reinforcement rack. However, unlike the second and third embodiments, the assembly device of this embodiment consists of only a main frame and does not have a sub-frame.

[0091] 17, a schematic diagram of the assembly apparatus 1C of this embodiment shows four main stands 40. The main reinforcement placing parts 42 of the main stands 40 are formed with rollers and can assist the movement of the placed main reinforcement.

[0092] A slit 32b is formed in the lower support member 32 at a position corresponding to the main reinforcement restraint 42 so that the main reinforcement restraint 42 can move downward below the lower support member 32 of the reinforcement rack 30. A slit 36b (not shown) that allows the main reinforcement restraint 42 to pass through is also formed in the side support member 36 not shown in Fig. 17. Although not shown, in the assembly device 1C, a stopper 41a for preventing the lifting section 43 of the main stand 40 from descending is provided below the lower side support member 32.

[0093] The main reinforcing bar feed rollers 61 provided in the assembly apparatus 1A of the first embodiment are not provided in the assembly apparatus 1C to avoid interference with the main reinforcing bars placed on the downwardly moving main reinforcing bar placing section 42. In addition, as shown in Figure 18, the corners of the lower support members 32, 32 face inward and upward.

[0094] The method for assembling the reinforcing bar cage Cg' using the assembling device 1C configured as described above will be described with reference to Fig. 18, which shows the assembly process. The reinforcing bar cage Cg' includes upper end main reinforcements 11 (first main reinforcements) and lower end main reinforcements 13 (second main reinforcements), but does not have upper and lower two-stage reinforcements.

[0095] After aligning the shear reinforcement bars 20 as shown in FIG. 18(A), the upper end main reinforcement bars 11 and the lower end main reinforcement bars 13 are inserted into the shear reinforcement bars 20 as shown in FIG. 18(B), and the shear reinforcement bars 20 are placed on the main reinforcement rests 42 of the main frame 40. Next, as shown in FIG. 18(C), the upper end main reinforcement 11 and the lower end main reinforcement 13 are lifted up to the inside of the upper edge portion 20a of the shear reinforcement 20 by the main reinforcement placing portion 42, and the upper end main reinforcement 11 is disposed in a predetermined position.

[0096] 18(D), the main reinforcement restraint 42 is lowered below the lower edge 20d of the shear reinforcement 20, so that the lower end main reinforcement 13 is placed on the lower edge 20d and placed in a predetermined position. In this manner, the reinforcing bar cage Cg' is assembled. In this embodiment, the main frame 40 functions not only as the first frame but also as the second frame.

[0097] According to this embodiment, the frame is configured by the main frame 40 alone, which makes it possible to reduce the manufacturing cost of the assembly device 1C.

[0098] The assembling device 1C can also assemble the reinforcing bar cage Cg according to the first to third embodiments. In this case, when inserting the main reinforcements into the shear reinforcement 20, all of the main reinforcements are inserted and placed on the main reinforcement placement section 42, and when the main reinforcement placement section 42 is lowered, the upper two-stage reinforcements 12 and the lower two-stage reinforcements 14 are placed in this order on the side edges 20b, 20c of the shear reinforcement 20 at a predetermined placement height, and then the lower end main reinforcement 13 is placed.

[0099] Fifth Embodiment Fig. 19 shows a fifth embodiment of the present invention. Unlike the fourth embodiment, this embodiment raises and lowers the main reinforcement restraint section of the main frame by raising and lowering the reinforcing bar rack, and arranges the main reinforcement bars placed on the reinforcing bar restraint section at a fixed height within the shear reinforcement bars arranged side by side on the reinforcing bar rack.

[0100] In this embodiment, an assembly device 1C' is used in which the reinforcement rack 30 of the assembly device 1C (FIG. 17) used in the fourth embodiment is made movable. The reinforcement rack 30 of the assembly device 1C' is driven by converting the rotational motion of a motor (not shown) located nearby into vertical motion via a transmission mechanism (not shown).

[0101] A method for assembling a reinforcing bar cage Cg' using the assembling device 1C' will be described with reference to FIG. 19 showing the assembling process. As shown in Figure 19(A), after aligning the shear reinforcement bars 20 on the reinforcement rack 30, as shown in Figure 19(B), the upper end main reinforcement bars 11 and the lower end main reinforcement bars 13 are inserted into the shear reinforcement bars 20 and placed on the main reinforcement placement section 42 of the main frame 40.

[0102] Next, as shown in Figure 19 (C), while keeping the height position of the main reinforcement placing section 42 constant, the reinforcement rack 30 is lowered so that the inside of the upper edge section 20a of the shear reinforcement 20 is aligned with the height position of the upper main reinforcement 11 placed on the main reinforcement placing section 42, and the upper main reinforcement 11 is arranged at a predetermined position within the shear reinforcement 20.

[0103] 19(D), the reinforcing bar rack 30 is raised, and the inside of the lower edge portion 20d of the shear reinforcement bar 20 is aligned with the height position of the lower main reinforcement bar 13 placed on the main reinforcement restraint portion 42, and the lower main reinforcement bar 13 is placed at a predetermined position within the shear reinforcement bar 20. In this manner, the reinforcing bar cage Cg' is assembled. As in the fourth embodiment, in this embodiment, the main frame 40 functions not only as the first frame but also as the second frame.

[0104] According to this embodiment, by raising and lowering the reinforcement rack 30 on which the shear reinforcement bars 20 are arranged, the height position of the main reinforcement bar placing section 42 of the main frame 40 can be kept constant, and the main reinforcement bars 10 placed on the main reinforcement bar placing section 42 can be arranged at a predetermined position within the shear reinforcement bars 20.

[0105] Sixth Embodiment 20 and 21 show a sixth embodiment of the present invention. In this embodiment, unlike the first embodiment, the function of the main reinforcement feed block, instead of the sub-frame, as a platform (second frame) on which main reinforcements other than the upper end main reinforcements (second main reinforcements) are placed to be arranged in the shear reinforcement, is given to the main reinforcement feed block. Therefore, the frame of the assembly device of this embodiment consists of only the main frame and does not have a sub-frame.

[0106] In the schematic diagram of the assembly device 1D of this embodiment shown in Figure 20, four main frames 40 (first frames) are shown, and a main reinforcement feed table 60 (second frame) is provided for each main frame 40. The height of the main reinforcement feed rollers 61 of the main reinforcement feed table 60 is set to correspond to the installation height position of the upper two-stage reinforcement 12 in the shear reinforcement 20 aligned on the reinforcement rack 30. In addition, as shown in Figure 21, the lower supports 32, 32 of the reinforcement rack 30 have their corners facing inward and upward.

[0107] A method for assembling a reinforcing bar cage Cg using the assembling device 1D having the above configuration will be described with reference to FIG. 21 showing the assembling process.

[0108] After aligning the shear reinforcement bars 20 as shown in FIG. 21(A), the upper end main reinforcement 11 is inserted into the shear reinforcement bars 20 as shown in FIG. 21(B), and the shear reinforcement bars are placed on the main reinforcement feed rollers 61 of the main reinforcement feed table 60. Next, as shown in FIG. 21(C), the upper end main reinforcement 11 is lifted up to the inside of the upper side portion 20a of the shear reinforcement 20 by the main reinforcement restraining portion 42 and disposed in a predetermined position.

[0109] Next, as shown in Figure 21(D), the upper two-stage reinforcement 12, the lower two-stage reinforcement 14, and the lower end main reinforcement 13 are inserted into the shear reinforcement 20 and placed on the main reinforcement feed roller 61. Next, the upper two-stage reinforcement 12 on the main reinforcement feed roller 61 is arranged on the side edges 20b, 20c of the shear reinforcement 20.

[0110] 21(E), the main reinforcement placing section 42 is raised, the shear reinforcement 20 is hung from the upper end main reinforcement 11 on the main reinforcement placing section 42, and the shear reinforcement 20 is removed from the reinforcement rack 30. When the lower two-stage reinforcement 14 on the main reinforcement feed roller 61 reaches the installation height of the lower two-stage reinforcement 14 in the shear reinforcement 20 due to the raising of the shear reinforcement 20, the lower two-stage reinforcement 14 is installed on the side edges 20b, 20c of the shear reinforcement 20.

[0111] By further raising the shear reinforcement 20, the lower end main reinforcement 13 on the main reinforcement feed roller 61 is placed on the lower edge portion 20d of the shear reinforcement 20 and arranged in a predetermined position. In this way, the reinforcing bar cage Cg is assembled. In this embodiment, the main reinforcement feed roller 61 also functions as a main reinforcement holder in the second frame for arranging the second main reinforcement in the shear reinforcement 20.

[0112] Seventh Embodiment 22 and 23 show a seventh embodiment of the present invention. In this embodiment, unlike the first to sixth embodiments, a reinforcing bar cage having a step in the middle of its length is assembled.

[0113] As shown in Fig. 23(C), the reinforcing bar cage Cga has shear reinforcement bars 20A arranged side by side from one end to the center of the reinforcing bar rack 30 and shear reinforcement bars 20B arranged side by side at the other end, and the dimensions of the shear reinforcement bars 20B are larger than those of the shear reinforcement bars 20A. The reinforcing bar cage Cga also has upper end main reinforcement bars 11A (bent main reinforcement bars, first main reinforcement bars) bent in a crank shape at the middle of its longitudinal direction, and the bent portion 11Ax of the upper end main reinforcement bars 11A is positioned between the shear reinforcement bars 20A and the shear reinforcement bars 20B, forming a step in the reinforcing bar cage Cga.

[0114] The assembling device 1B (FIG. 14) used in the second embodiment can be used to assemble the reinforcing bar cage Cga. A method for assembling the reinforcing bar cage Cga using the assembling device 1B will be described with reference to FIGS. 22(A) to 22(C) and 23(A) to 23(C) showing the assembly process.

[0115] As shown in Figure 22(A), after aligning the shear reinforcement bars 20A, 20B from one end to the center and the other end of the reinforcement rack 30, as shown in Figure 22(B), the upper main reinforcement bars 11A are inserted into the shear reinforcement bars 20A, 20B, and part of the upper main reinforcement bars 11A are placed across multiple main reinforcement placement sections 42 located at the same height.

[0116] Next, as shown in Figure 22(C), the main reinforcement restraints 42 corresponding to the different height portions of the upper-end main reinforcement 11A are raised. As a result, the upper-end main reinforcement 11A is stably placed on the main reinforcement restraints 42. Subsequently, as shown in Figure 23(A), the upper-end main reinforcement 11A is lifted by the main reinforcement restraints 42 to the inside of the upper edge portions 20a of the shear reinforcement bars 20A, 20B, and is arranged in a predetermined position.

[0117] As shown in Figure 23(B), the lower main reinforcement 13 is inserted into the shear reinforcement bars 20A, 20B and placed across the main reinforcement restraints 52. As shown in Figure 23(C), the main reinforcement restraints 52 are lowered below the lower edge portions 20d of the shear reinforcement bars 20A, 20B, so that the lower main reinforcement 13 is placed on the lower edge portions 20d and arranged in a predetermined position. In this way, the reinforcing bar cage Cga is assembled.

[0118] According to this embodiment, the main reinforcement placing section 42 can place the upper end main reinforcement 11A in a stable state by varying the placing height position according to the shape of the upper end main reinforcement 11A, which in turn makes it easier to assemble the reinforcing bar cage Cga having steps.

[0119] Eighth Embodiment Fig. 24 shows the eighth embodiment of the present invention. In this embodiment, similar to the seventh embodiment, the upper end main reinforcement is bent to form a step in the reinforcing bar cage, but it differs from the seventh embodiment in the timing of changing the placement height of the main reinforcement placement part in accordance with the shape of the upper end main reinforcement.

[0120] To assemble the reinforcing bar cage Cga in this embodiment, an assembly device 1B' is used, which is the assembly device 1B (FIG. 14) used in the second and seventh embodiments, except that the reinforcing bar rack 30 is made movable up and down. In the method of assembling the reinforcing bar cage Cga using the assembling device 1B', after inserting the upper main reinforcement 11A into the shear reinforcement bars 20A, 20B as shown in Fig. 22(B) of the seventh embodiment, the reinforcement rack 30 is lowered while keeping the placement height of the main reinforcement placing parts 42 constant, as shown in Fig. 24(A), so that the insides of the upper edge parts 20a of the shear reinforcement bars 20A, 20B are aligned with the height position of the upper main reinforcement 11A. Thereafter, as shown in Fig. 24(B), the main reinforcement placing parts 42 corresponding to the different height parts of the upper main reinforcement 11A are raised to stabilize the upper main reinforcement 11A.

[0121] Ninth Embodiment 25 and 26 show a ninth embodiment of the present invention. In the seventh embodiment, the upper main reinforcement of the reinforcing bar cage having a step is bent, but in this embodiment, the lower main reinforcement is bent.

[0122] As shown in Fig. 26(C), the reinforcing bar cage Cgb has upper end main reinforcements 11 extending linearly and lower end main reinforcements 13A (bent main reinforcements, second main reinforcements) bent in a crank shape at the midpoint in the longitudinal direction. The bent portion 13Ax of the lower end main reinforcement 13A is arranged between the smaller shear reinforcement 20A and the larger shear reinforcement 20B, forming a step in the reinforcing bar cage Cgb.

[0123] The assembling device 1B (FIG. 14) used in the second and seventh embodiments can be used to assemble the reinforcing bar cage Cgb. The assembling method for the reinforcing bar cage Cgb using the assembling device 1B will be described with reference to FIGS. 25(A) to 25(D) and 26(A) to 26(C) showing the assembly process.

[0124] As shown in Figure 25(A), the shear reinforcement bars 20A and 20B are aligned from one end to the center and the other end of the reinforcement rack 30, and then, as shown in Figure 25(B), the upper main reinforcement bars 11 are inserted into the shear reinforcement bars 20A and 20B and placed across multiple main reinforcement placement sections 42.

[0125] Next, as shown in Fig. 25(C), the upper main reinforcement 11 is raised up to the inside of the upper edge portion 20a of the shear reinforcement 20A by the main reinforcement placing portion 42. Subsequently, as shown in Fig. 25(D), the lower main reinforcement 13A is inserted into the shear reinforcement 20A, 20B, and part of the lower main reinforcement 13A is placed on part of the multiple main reinforcement placing portions 52 located at the same height.

[0126] Next, as shown in Figure 26(A), the main reinforcement restraints 52 corresponding to the different height portions of the lower end main reinforcement 13A are moved upward. As a result, the lower end main reinforcement 13A is placed on the main reinforcement restraints 52 in a stable state.

[0127] Next, as shown in Figure 26(B), the main reinforcement restraints 42 are raised to hang the shear reinforcement 20A from the upper main reinforcement 11 on the main reinforcement restraints 42, and the upper main reinforcement 11 is lifted up to the inside of the upper edge portion 20a of the shear reinforcement 20B. After that, the upper main reinforcement 11 is disposed at a predetermined position within the shear reinforcement 20A, 20B.

[0128] Next, as shown in Figure 26(C), the main reinforcement restraints 52 are lowered below the lower edge portions 20d of the shear reinforcements 20A and 20B, so that the lower end main reinforcements 13A are placed on the lower edge portions 20d and disposed in a predetermined position. In this way, the reinforcing bar cage Cgb is assembled.

[0129] Tenth Embodiment Fig. 27 shows a tenth embodiment of the present invention. In this embodiment, a reinforcing bar cage is assembled in which the lower end main reinforcement is bent to form a step, as in the above-mentioned ninth embodiment, but it differs from the ninth embodiment in the timing for changing the placement height position of the main reinforcement placement part in accordance with the shape of the lower end main reinforcement.

[0130] In this embodiment, the reinforcing bar cage Cgb (see FIG. 26) is assembled using the assembling device 1B (FIG. 14) used in the second, seventh, and ninth embodiments. In the method of assembling the reinforcing bar cage Cgb using the assembly device 1B, as shown in Figure 25(C) of the ninth embodiment, the upper end main reinforcement 11 inserted into the shear reinforcement bars 20A, 20B is lifted up to the inside of the upper edge portion 20a of the shear reinforcement bar 20A.

[0131] Then, as shown in Fig. 27, before inserting the lower-end main reinforcements 13A, the placement height positions of the main reinforcement placement parts 52 are varied depending on the shape of the lower-end main reinforcements 13A. After the lower-end main reinforcements 13A are inserted and placed on the main reinforcement placement parts 52 at different placement height positions, the reinforcing bar cage Cgb is assembled in the same procedure as in the ninth embodiment (Figs. 26(B) and (C)).

[0132] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. Furthermore, components of different embodiments can be combined as appropriate. In the above first to third and sixth embodiments, a reinforcing bar cage was described that has upper two-stage reinforcements and lower two-stage reinforcements as other main reinforcements between the upper end main reinforcement and the lower end main reinforcement, but it is not necessary to have other main reinforcements as in the above fourth and fifth embodiments, and it may have only one of the two-stage reinforcements, or it may include more other main reinforcements. In cases where there are no other main reinforcements between the upper and lower main reinforcements as in the fourth embodiment, the assembly device does not need to be provided with a second frame. In that case, after the upper main reinforcements are arranged in the shear reinforcement and tied together, the lower main reinforcement may be inserted into the shear reinforcement and placed on a main reinforcement feed table, and the shear reinforcement may be suspended by the first frame, so that the lower main reinforcement is placed on the lower edge of the shear reinforcement. In the first and sixth embodiments, the bottom support member 32 and the side support member 36 of the reinforcement rack 30 extend continuously in the longitudinal direction of the reinforcing bar cage, but as in the second to fifth embodiments, slits may be provided so that the main reinforcement placing portions 42, 52 can move from the slits below the side support member 36 and the bottom support member 32. In this case, the stop portions 41a, 51a are provided below the bottom support member 32. In the above embodiment, the object to be pre-assembled is a reinforcing bar cage of a beam, but it may also be a reinforcing bar cage of a column. In the above embodiment, the main reinforcement restraint section or the reinforcement rack is raised and lowered by a motor as a lifting drive source, but it may also be raised and lowered by a hydraulic or pneumatic cylinder. [Industrial Applicability]

[0133] The present invention can be applied to an assembly method and an assembly device for pre-assembling reinforcing bars such as columns and beams of a reinforced concrete structure. [Explanation of symbols]

[0134] Cg, Cg', Cga, Cgb Reinforced concrete cage 1A, 1B, 1B', 1C, 1C', 1D Assembly equipment 2. Scaffolding 2a Plank scaffolding 2b Lattice scaffold 3 Main reinforcement supply stand 3a Temporary storage area 3b, 3e frame 3c, 3f Laura 3d supply part 3g legs 4 Stopper Stand 5 U-shaped jig 10 Main reinforcement 11 Top main bar (1st main bar) 11A Upper end main bar (bent main bar, first main bar) 11Ax bending part 12 Upper double-stage reinforcement (second main reinforcement) 13 Bottom main bar (second main bar) 13A Lower end main bars (bent main bars, second main bars) 13Ax bending part 14 Lower double-stage reinforcement (second main reinforcement) 20 Shear reinforcement 20a Upper edge 20b,20c side part 20d bottom 30 Reinforcement rack 31 Lower support part 32 Lower support member 32a Engagement groove (holding part) 32b Break 33 Horizontal base 34 Small post 34a Height adjustment means 34b bracket 34U Small Support Unit 35 Side support part 36 Side supports 36a Engagement groove (holding part) 36b Break 37 Pillar section 38 base 38a Width adjustment means 40 Main stand (1st stand, 2nd stand) 41 Pillar section 41a Stop part 42 Main reinforcement placement section (main reinforcement holding section) 43 Lifting section 43a Placement part receiving part 44 Motor 45 Transmission Mechanism 50 Sub-mount (second mount) 51 Pillar section 51a Stop part 52 Main reinforcement placement section (main reinforcement holding section) 53 Lifting section 53a Placement part receiving part 54 Motor 55 Transmission Mechanism 60 Main reinforcement slide (second frame) 61 Main reinforcing bar feed roller (main reinforcing bar holding part) 70 Beam member

Claims

1. A method for assembling a reinforcing bar cage having a plurality of main reinforcements having portions extending parallel to each other and a plurality of frame-shaped shear reinforcements surrounding the main reinforcements, an alignment step of arranging the shear reinforcement bars in an upright state at predetermined intervals; an inserting step of inserting a plurality of the main reinforcements into the arranged shear reinforcement bars; a reinforcing bar arrangement process in which a plurality of stands, which may be liftable, on which the inserted main reinforcements are placed in a spanning state and the shear reinforcement are moved relative to each other in the vertical direction, and the main reinforcement is arranged at a predetermined position within the shear reinforcement, 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 plurality of frames include a first frame that can be raised and lowered for disposing the first main reinforcement and a second frame that can be raised and lowered for disposing the second main reinforcement, The above reinforcement process is Lifting the first main reinforcement by raising the first frame and arranging it inside the upper edge portion of the shear reinforcement, and then further lifting the first main reinforcement by raising the first frame to suspend the shear reinforcement from the first main reinforcement, thereby releasing the lower part of the shear reinforcement; the shear reinforcement hanging from the first main reinforcement lifted up on the first frame and the second frame carrying the second main reinforcement are moved relative to each other in the vertical direction, thereby disposing the second main reinforcement within the shear reinforcement except for the area inside the upper edge portion; A method for assembling a reinforcing bar cage, comprising:

2. The method for assembling a reinforcing bar cage according to claim 1, The inserting step includes inserting a plurality of the main reinforcements into the arranged shear reinforcements from the same height position. A method for assembling a reinforcing bar cage.

3. The method for assembling a reinforcing bar cage according to claim 1 or 2, The reinforcing bar cage has a step in the middle of its longitudinal direction, and the plurality of main reinforcements include bent main reinforcements bent in a crank shape at the middle of its longitudinal direction, and the plurality of shear reinforcements are formed to have different sizes depending on the position of the reinforcing bar cage in the longitudinal direction, The aligning step includes arranging the shear reinforcement bars of a first size in a first region in the alignment direction, and arranging the shear reinforcement bars of a second size in a second region adjacent to the first region, The inserting step includes inserting the folded main reinforcement bars into the shear reinforcement bars of different sizes arranged side by side, A method for assembling a reinforcing bar cage, characterized in that the plurality of stands on which the inserted bent main reinforcing bars are placed can be set at different placement height positions corresponding to the shape of the bent main reinforcing bars.

4. An apparatus for assembling a reinforcing bar cage having a plurality of main reinforcements having portions extending parallel to each other 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 reinforcement rack provided to extend linearly and on which a plurality of the shear reinforcements are arranged in an upright state at predetermined intervals; and a plurality of stands that are provided along the reinforcing bar rack and on which the main reinforcements inserted into the shear reinforcements arranged side by side on the reinforcing bar rack can be placed in a spanning state, the plurality of cradles include a first cradle for disposing the first main reinforcement and a second cradle for disposing the second main reinforcement, and each cradle has a main reinforcement holding part that extends in a direction intersecting the extending direction of the reinforcement rack and that may be liftable and on which the main reinforcement is placed, The main reinforcement holding portion of the first frame is capable of lifting the first main reinforcement thereon to the inside of the upper edge portion of the shear reinforcement, and is also capable of lifting the first main reinforcement arranged on the inside of the upper edge portion, so that the shear reinforcement can be suspended from the first main reinforcement placed on the main reinforcement holding portion of the first frame and removed from the reinforcement rack, leaving the lower portion open. A reinforcing bar cage assembly device characterized in that the shear reinforcement hanging from the first main reinforcement raised by the main reinforcement holding portion of the first frame and the main reinforcement holding portion of the second frame on which the second main reinforcement is placed are capable of relative movement in the vertical direction, thereby allowing the second main reinforcement to reach the installation height position of the second main reinforcement within the shear reinforcement.

5. The reinforcing bar cage assembling device according to claim 4, A reinforcing bar cage assembly device characterized by being provided above the reinforcement rack, extending in a direction intersecting the extension direction of the reinforcement rack, being rotatable around an axis, and having a main reinforcement feed roller for loading the main reinforcement to be inserted into the shear reinforcement bars arranged side by side on the reinforcement rack.

6. The reinforcing bar cage assembling device according to claim 4 or 5, The reinforcing bar cage has a step in the middle of its longitudinal direction, and the plurality of main reinforcements include bent main reinforcements that are bent in a crank shape in the middle of its longitudinal direction, and the plurality of shear reinforcements arranged in the reinforcement rack include shear reinforcements of a first size placed in a first region of the reinforcement rack and shear reinforcements of a second size placed in a second region adjacent to the first region, A reinforcing bar cage assembling device characterized in that the main reinforcement holding portions of the plurality of frames can be set at different height positions depending on the shape of the bent main reinforcement.

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