Reinforcing bar cage assembling device and reinforcing bar cage assembling method

Abstract

To provide a reinforcement cage assembling device and a reinforcement cage assembling method capable of efficiently assembling a reinforcement cage with a simple structure.SOLUTION: A reinforcement cage assembling device 1 is a device for assembling a reinforcement cage B having a plurality of frame-shaped hoop reinforcements B1 and a plurality of long main reinforcements B2 mounted along peripheral surfaces of the hoop reinforcements B1. The device 1 comprises: a hoop reinforcement holding member 20 that positions the plurality of hoop reinforcements B1 so as to be spaced horizontally, and holds the plurality of positioned hoop reinforcements B1 so as to be respectively rotatable circumferentially; a main reinforcement receiving member 40 that supports the main reinforcement B2 from below at a position where the main reinforcement B2 can be attached to the peripheral surfaces of the plurality of hoop reinforcements B1 held by the hoop reinforcement holding member 20; a main reinforcement holding member 50 that holds the main reinforcement B2; and a lifting device 60 that moves the main reinforcement holding member 50 in a vertical direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a reinforcing bar cage assembling device and a reinforcing bar cage assembling method, and more particularly to a reinforcing bar cage assembling device and a reinforcing bar cage assembling method for assembling a reinforcing bar cage having a plurality of hoops and a plurality of main bars. [Background technology]

[0002] Conventionally, when assembling reinforcing bar cages used in cast-in-place concrete pile construction, the commonly used assembly method involves the steps of installing an annular reinforcing ring, fixing multiple long main reinforcements to the reinforcing ring at predetermined intervals, wrapping the multiple main reinforcements from the outside with shear reinforcement, and fixing the overlapping portions of the shear reinforcement by flare welding. In this context, a reinforcing bar cage assembling device has been proposed for efficiently assembling the reinforcing bar cages (see, for example, Patent Document 1).

[0003] The reinforcing bar cage assembling device described in Patent Document 1 includes a hoop holding means for arranging a plurality of annular hoops in a horizontal line at predetermined intervals, a main reinforcement holding arm having a mounting surface longer than the outer diameter of each hoop held by the hoop holding means and for arranging main reinforcement along the circumferential surface of each hoop, and a main reinforcement lifting means for raising and lowering the main reinforcement holding arm. With the above configuration, the main reinforcement can be attached to each hoop in sequence by moving the main reinforcement holding arm from the top to the bottom of the hoop using the main reinforcement lifting means. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-36667 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the reinforcing bar cage assembly device described in Patent Document 1 was relatively large and had the potential to become complicated. For example, in order to sequentially install the main reinforcement along the periphery of the hoop, it was necessary to raise and lower the main reinforcement holding arm, which was longer than the hoop, resulting in a large and complicated device. Furthermore, since the main reinforcement had to be installed sequentially at intervals along the periphery of the hoop, the worker had to move around while installing the main reinforcement.

[0006] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a reinforcing bar cage assembling device and a reinforcing bar cage assembling method that are simple in structure but can efficiently assemble reinforcing bar cages. Another object of the present invention is to provide a reinforcing bar cage assembling device and method that can reduce the labor required for assembling reinforcing bar cages and improve the quality of the reinforcing bar cages. [Means for solving the problem]

[0007] The above problem is solved by a reinforcing bar cage assembling device of the present invention, which is a reinforcing bar cage assembling device for assembling a reinforcing bar cage having a plurality of frame-shaped hoops and a plurality of long main reinforcements attached along the circumferential surfaces of the hoops, and which comprises: a hoop retaining member that positions the plurality of hoops so that they are aligned horizontally at predetermined intervals and holds each of the positioned hoops so that they can rotate in the circumferential direction of the hoops; main reinforcement receiving members that support the main reinforcements from below at positions where the main reinforcements can be attached to the circumferential surfaces of the plurality of hoops held by the hoop retaining members; main reinforcement receiving members that are provided at positions different from the main reinforcement receiving members and that hold the main reinforcements; and a lifting device that moves the main reinforcement receiving members in the up and down direction. The main reinforcement holding member has a main reinforcement holding portion that holds the main reinforcement, and the main reinforcement holding portion is attached to the main body of the main reinforcement holding member so as to move between a holding position where it can hold the main reinforcement and a spaced position away from the main reinforcement. This is solved by: With the above configuration, it is possible to realize a reinforcing cage assembling device that has a simple structure but is capable of assembling reinforcing cages efficiently. Specifically, the reinforcing bar cage assembly device includes a hoop-reinforcing bar holder that holds multiple hoops so that they can rotate circumferentially, a main reinforcing bar support member, a main reinforcing bar holder, and a lifting device that moves the main reinforcing bar holder up and down. Therefore, for example, after attaching a first main reinforcing bar to the circumferential surface of a hoop, the multiple hoops can be rotated circumferentially by moving the main reinforcing bar holder upward. Then, a second main reinforcing bar can be attached to the circumferential surface of the hoop at the same position where the first main reinforcing bar was attached. By repeating these assembly steps, the worker can perform the main reinforcing bar installation work (reinforcing bar arrangement work) without moving. In other words, despite its simple structure, it achieves labor-saving work and enables efficient assembly of reinforcing bar cages. It also prevents the reinforcing bar cage assembly device from becoming too large. Furthermore, the main reinforcement holding members can move between a "holding position" where they hold the main reinforcements and a "separate position" where they are separated from the main reinforcements. This allows the main reinforcement holding members to sequentially hold each main reinforcement attached along the circumferential surface of the hoop reinforcement, making the main reinforcement attachment work more efficient. Furthermore, the main reinforcement holding members hold the main reinforcement attached to the hoops, preventing the hoops from rotating unintentionally (rotating). In other words, the rebar cage assembly device is equipped with a braking system that prevents the hoops from rotating.

[0009] In this case, it is preferable to further provide a second main reinforcement holding member that is provided at a position different from the main reinforcement receiving member and the main reinforcement holding member and holds the main reinforcement, the main reinforcement holding member holding the first main reinforcement attached to the circumferential surface of the hoop reinforcement at a position above the main reinforcement receiving member, and the second main reinforcement holding member holding the second main reinforcement attached to the circumferential surface of the hoop reinforcement. With the above configuration, either the main reinforcement holding member or the second main reinforcement holding member can always hold the main reinforcement attached to the hoop, thereby preventing the hoop from unintentionally rotating. In particular, when a certain number of main reinforcements are attached to a hoop, it can prevent the hoop from rotating in the circumferential direction away from the main reinforcement receiving member. It also prevents damage to the reinforcing bar cage during assembly, improving the quality of the reinforcing bar cage.

[0010] In this case, it is preferable that the main reinforcement receiving member has a main reinforcement receiving portion that supports the main reinforcement, and the main reinforcement receiving portion is attached to the main body of the main reinforcement receiving member so as to move between a support position where it can support the main reinforcement and a spaced position away from the main reinforcement, and the second main reinforcement holding member has a second main reinforcement holding portion that holds the main reinforcement, and the second main reinforcement holding portion is attached to the main body of the second main reinforcement holding member so as to move between a holding position where it can hold the main reinforcement and a spaced position away from the main reinforcement. The above configuration allows the main reinforcement support portion to move between the "support position" and the "separate position." This makes it easy to lift the cage vertically using a lifting device such as a crane, for example, by moving the main reinforcement support portion from the "support position" to the "separate position" after the assembly work of the cage is completed. This also prevents unintentional damage to the assembled cage, improving the quality of the cage.

[0011] In this case, the hoop reinforcement holding member has a plurality of hoop reinforcement holding portions that hold the hoop reinforcement from below, and the plurality of hoop reinforcement holding portions are preferably attached so as to be movable in the vertical direction relative to the main body of the hoop reinforcement holding member, and are attached so as to be movable in directions perpendicular to the longitudinal direction and the vertical direction of the main reinforcement relative to the main body of the hoop reinforcement holding member. With the above configuration, the vertical and horizontal positions of the hoop retaining parts can be adjusted appropriately to correspond to the size and shape of the reinforcing bar cage (the size and shape of the hoops), allowing the hoop retaining parts to suitably hold hoops of different sizes and shapes.

[0012] In this case, the structure may further comprise a positioning member that is provided at a position outside the main reinforcement support member in the longitudinal direction of the main reinforcement and that positions the main reinforcement in the longitudinal direction by abutting against the longitudinal end face of the main reinforcement supported by the main reinforcement support member, and the positioning member may be disposed at a peripheral position of the main reinforcement support member, and the abutment surface of the positioning member that abuts against the end face of the main reinforcement may be formed so as to be narrower than the hoop reinforcement holding member in directions perpendicular to the longitudinal direction and the up-down direction of the main reinforcement. With the above configuration, the positioning member can position the main reinforcement in the longitudinal direction, and the main reinforcement can be attached to an appropriate position on the circumferential surface of each hoop reinforcement. Furthermore, by rotating each hoop in the circumferential direction, new main reinforcement is always attached to each hoop at the same position. This allows for a compact positioning member. In other words, when the assembly device is viewed from the longitudinal direction of the main reinforcement, the positioning member can be made smaller because the contact surface of the positioning member and the main reinforcement installed in the main reinforcement receiving member only need to overlap.

[0013] The above-mentioned problem can also be solved by a reinforcing bar cage assembling method using the above-mentioned reinforcing bar cage assembling device, which includes a hoop bar arranging step of arranging the multiple hoop bars on the hoop bar holding members so that they are lined up horizontally at predetermined intervals, a main bar arranging step of arranging the multiple hoop bars on the main bar receiving members, a main bar attaching step of attaching the multiple main bars supported by the main bar receiving members to the circumferential surfaces of the multiple hoop bars held by the hoop bar holding members, and a main bar moving step of moving the multiple main bar holding members that hold the multiple main bars upward by the lifting device, wherein in the main bar moving step, the multiple main bars are moved upward by moving the multiple main bars and rotating each of the multiple hoops connected to the multiple main bars in the circumferential direction of the hoops. [Effects of the Invention]

[0014] According to the reinforcing bar cage assembling device and reinforcing bar cage assembling method of the present invention, it is possible to assemble reinforcing bar cages efficiently despite the simple structure. It is also possible to reduce the labor required for assembling the reinforcing bar cages and improve the quality of the reinforcing bar cages. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is an overall perspective view of the reinforcing bar cage assembling device. [Figure 2] FIG. 10 is a perspective view of the completed reinforcing bar cage. [Figure 3] FIG. 10 is a perspective view of the hoop retaining member, showing the hoop retaining member in the "reference position." [Figure 4] FIG. 10 is a perspective view of the hoop retaining member, showing the hoop retaining member in the "moving position." [Figure 5A] 10 is a front view of the hoop retaining portion, showing the state in which the hoop retaining portion is holding the hoop retaining portion. FIG. [Figure 5B] FIG. [Figure 6A] FIG. 10 is a perspective view of a main reinforcement receiving member and a second main reinforcement holding member, each in the "separated position." [Figure 6B] 1A and 1B are perspective views of a main reinforcement receiving member and a second main reinforcement holding member, showing the respective states in the "receiving position" and "holding position." [Figure 7A] FIG. 10 is a perspective view of the main reinforcement holding member and the lifting device, showing the main reinforcement holding member in the "holding position." [Figure 7B] FIG. 10 is a perspective view of the main reinforcement holding member and the lifting device, showing the state in which the lifting device is operating. [Figure 8A] This is a diagram explaining how to assemble a rebar cage (part 1). [Figure 8B] This is a diagram explaining how to assemble a reinforcing bar cage (part 2). [Figure 8C] This is a diagram explaining how to assemble a reinforcing bar cage (part 3). [Figure 8D] This is a diagram explaining how to assemble a rebar cage (part 4). [Figure 9] FIG. 1 is a process diagram showing a reinforcing bar cage assembly method. [Figure 10] FIG. 10 is a diagram showing a modified example of the second main reinforcement retaining member. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. This embodiment relates to an invention of a "reinforcing bar cage assembling device" that is a reinforcing bar cage assembling device that assembles a reinforcing bar cage having a plurality of hoops and a plurality of main bars, and is mainly characterized by comprising: a hoop holding member that positions the plurality of hoops so that they are spaced apart horizontally and holds the positioned plurality of hoops so that they can each rotate circumferentially; a main bar support member that supports the main bars from below at a position where the main bars can be attached to the circumferential surface of the plurality of hoops; a main bar support member that is located at a position different from the main bar support member and holds the main bars; and a lifting device that moves the main bar support member in the up and down direction. The present invention also relates to a "reinforcing bar cage assembling method" using the reinforcing bar cage assembling device.

[0017] <Rebar cage assembly device> The reinforcing bar cage assembling device 1 of this embodiment is an assembling device used when assembling a reinforcing bar cage B having a plurality of hoops B1 and a plurality of main reinforcements B2, as shown in Fig. 1. For example, it may be used when assembling a reinforcing bar cage B used in a cast-in-place concrete pile construction method. Specifically, the reinforcing bar cage assembly device 1 includes a feed-out table 10 that can store a plurality of main reinforcements B2 and feed the main reinforcements B2 horizontally, a hoop reinforcement holding member 20 that is arranged adjacent to the feed-out table 10 and holds a plurality of hoop reinforcements B1 in a horizontally spaced arrangement, a plurality of struts 30 that are attached at intervals to the widthwise ends of the hoop reinforcement holding member 20, main reinforcement support members 40 that are attached to each strut 30 and support the main reinforcement B2 at positions where the main reinforcement B2 can be attached to the circumferential surface of each hoop reinforcement B1, main reinforcement holding members 50 and second main reinforcement holding members 70 that hold the main reinforcement B2, and a lifting device 60 that moves the main reinforcement holding member 50 up and down. The cage reinforcing bar assembling device 1 further includes a plate-shaped positioning member 80 that is attached to the support 30 and positions the main reinforcements B2 fed from the feed table 10.

[0018] First, let us explain about the reinforcing bar cage B. As shown in Figure 2, the reinforcing bar cage B is mainly composed of a plurality of annular hoops B1 and a plurality of long main reinforcements B2 attached at intervals along the periphery of each hoop B1. The hoop B1 is also called a welded closed shear reinforcement (hoop), and is a ring-shaped (circular) reinforcing bar closed by, for example, electric resistance welding. The hoop B1 is not limited to a circular reinforcing bar, but may also be a frame-shaped reinforcing bar such as an elliptical, rectangular, or other polygonal shape. The hoop reinforcement B1 is arranged in a plurality of rows at predetermined intervals along the axial direction of the hoop reinforcement B1. It should be noted that the hoop B1 is different from a reinforcing bar in which shear reinforcement is wound in a spiral shape and the overlapping portions (lap portions) of the shear reinforcement are fixed by flare welding.

[0019] The main reinforcement B2 is a rod-shaped reinforcing bar that extends longitudinally along the axial direction of the hoop reinforcement B1. The main reinforcements B2 are arranged at predetermined intervals along the circumferential surface (inner circumferential surface) of each hoop B1, and are each bound to the inner circumferential surface of each hoop B1. The reinforcing bar cage B may further include an annular reinforcing ring in addition to the hoop reinforcement B1 and the main reinforcement B2.

[0020] The specifications of the reinforcing bar cage B (hoop bars B1, main bars B2) are as follows, for example: Note that the specifications are not particularly limited to those below. Hoop processing diameter: 60cm~300cm Hoop diameter: 6mm~41mm Hoop reinforcement yield strength (0.2% yield strength): 295KN / mm 2 ~1275KN / mm 2 Main bar length: 1m~15m Main bar diameter: 16mm~51mm Yield strength of main reinforcement (0.2% yield strength): 345KN / mm 2 ~1275KN / mm 2 Pitch of main reinforcement relative to hoop reinforcement: 100mm to 150mm Maximum number of main bars per hoop: 88

[0021] As shown in FIG. 1, the delivery table 10 is a work table for storing a plurality of main reinforcements B2 and delivering the main reinforcements B2 toward the main reinforcement receiving members 40. Specifically, the feed table 10 includes a table body 11 and feed rollers 12 (rotating rollers) that feed the main reinforcement bars B2 placed on the table body 11 in the horizontal direction.

[0022] As shown in Figures 1, 3, and 4, the hoop reinforcement holding member 20 is a holding stand that positions multiple hoop reinforcements B1 so that they are aligned horizontally at intervals and holds the positioned multiple hoop reinforcements B1 so that they can each rotate circumferentially around the hoop reinforcement B1. Specifically, the hoop retaining member 20 comprises a fixed frame 21 extending longitudinally along the longitudinal direction of the reinforcing bar cage B (main reinforcement B2), a movable frame 22 attached to the fixed frame 21, a height link device 23 for moving the movable frame 22 vertically relative to the fixed frame 21, a hoop retaining section 24 attached to the movable frame 22 for retaining the hoop reinforcement B1, and a rail device 25 for moving the hoop retaining section 24 in the width direction (short length direction) of the reinforcing bar cage B relative to the movable frame 22.

[0023] As shown in Figures 3 and 4, the height link device 23 has a pantograph mechanism (parallel link mechanism) and is a device that can move the moving frame 22 in the vertical direction relative to the fixed frame 21 and lock the moving frame 22. The rail device 25 is attached to the movable frame 22 and comprises a fixed rail 25a extending along the width direction of the hoop retaining member 20, sliders 25b and 25c supported so as to be slidable relative to the fixed rail 25a, a locking member (not shown) that locks the sliders 25b and 25c so that they cannot slide relative to the fixed rail 25a, and an operating lever (not shown) for releasing the locked state of the locking member.

[0024] A plurality of fixed rails 25a are arranged at intervals in the lengthwise direction of the hoop holding member 20, and in this embodiment, four fixed rails 25a are attached inside the moving frame 22. Similarly, a plurality of sliders 25b, 25c are arranged at predetermined intervals in the longitudinal direction of the hoop holding member 20, and are each supported by the fixed rail 25a. More specifically, the sliders 25 b and 25 c are supported by a fixed rail 25 a provided inside the moving frame 22 through an opening hole formed in the upper surface of the moving frame 22 . The first slider 25b and the second slider 25c are arranged as a pair in the width direction of the hoop holding member 20, and can slide independently on the fixed rail 25a.

[0025] The sliders 25b and 25c located on the outer sides of the hoop retaining member 20 in the longitudinal direction have a slider body and a rotation shaft 25d attached to the slider body and supporting the hoop retaining member. On the other hand, the sliders 25b and 25c located on the central side in the lengthwise direction of the hoop holding member 20 have a slider body and a pair of rotating rollers 25e journaled on the slider body. The sliders 25b and 25c rotatably support the hoop holder 24 via a rotation shaft 25d and a rotation roller 25e.

[0026] As shown in FIGS. 3 to 5A and 5B, the hoop holding portion 24 is a rod-shaped holding member that extends longitudinally in the length direction of the hoop holding member 20 and supports each hoop B1 from below. The hoop reinforcement holding portion 24 has a first hoop reinforcement holding portion 24A and a second hoop reinforcement holding portion 24B that are mounted on the fixed frame 21 (movable frame 22), and a third hoop reinforcement holding portion 24C that is mounted on the upper part of the support 30 via a bracket 31. The hoop holders 24A, 24B, and 24C are attached to the fixed frame 21 and the support 30 so as to be rotatable about their respective central axes. That is, the hoop retaining portion 24 can retain the hoop B1 so that it can rotate along the circumferential direction of the hoop B1.

[0027] The hoop holders 24A, 24B, and 24C are designed to rotate freely around their respective central axes, but may also be driven and controlled by a drive motor (not shown) to rotate.

[0028] The hoop retaining portion 24 has a plurality of convex portions 24a and concave portions 24b arranged alternately adjacent to each other in the extending direction, and the convex portions 24a and concave portions 24b give the hoop retaining portion 24 a bellows shape. In other words, the hoop retaining portion 24 has an abacus bead shape with abacus beads lined up in succession. The convex portion 24a and the concave portion 24b are formed on the outer surface of the hoop holding portion 24 as a V-shaped convex portion (protrusion) and an inverted V-shaped concave portion (groove), respectively. In the above configuration, as shown in FIGS. 5A and 5B, the hoop B1 is inserted into the recess 24b and is held by the hoop holder 24 in a state where it is sandwiched between the protrusions 24a located on both sides of the recess 24b. This allows the hoop retaining portion 24 to suitably position the hoop B1 and retain the hoop B1 so that it can rotate. The hoop retaining portion 24 is also called a hoop pitch roller because it positions each hoop B1 and determines the pitch between the hoops B1.

[0029] In the above configuration, as shown in Figures 3 and 4, the hoop reinforcement holding member 20 is attached so as to be movable in the vertical direction relative to the main body of the hoop reinforcement holding member 20, and is attached so as to be movable in directions perpendicular to the longitudinal direction and vertical direction of the main reinforcement B2. Specifically, the hoop holding member 20 can change the vertical and horizontal positions of the hoop holding portion 24 by means of the height link device 23 and the rail device 25. Therefore, the position of the hoop retaining portion 24 can be adjusted appropriately to match the size and shape of the hoop B1, making it possible to easily assemble reinforcing bar cages B of various sizes and shapes.

[0030] As shown in FIG. 1, the support pillars 30 are attached to one end of the hoop holding member 20 (fixed frame 21) in the width direction, and a plurality of support pillars 30 are arranged at intervals in the length direction of the hoop holding member 20. As shown in FIG. 6A, a main reinforcement receiving member 40, a second main reinforcement holding member 70, and a positioning member 80 are attached to the outer surface of the support 30 on the side opposite to the delivery table 10 side. As shown in FIG. 7A, a main reinforcement holding member 50 and an elevating device 60 are attached to the outer surface of the support 30 on the side of the delivery table 10.

[0031] As shown in Figures 6A and 6B, the main reinforcement receiving member 40 is a member that supports the main reinforcement B2 from below at a predetermined position on the inner surface of multiple hoop reinforcement B1 held by the hoop reinforcement holding member 20 in order to attach the main reinforcement B2 to the predetermined position. Specifically, the main reinforcement support member 40 has a fixed rail 41 attached to the outer surface of the support 30 and extending horizontally from the support 30 toward the hoop reinforcement holding member 20, a support rail 42 supported so as to be able to slide relative to the fixed rail 41, and a main reinforcement support roller 43 (main reinforcement support part) arranged on the support rail 42 and attached so as to be able to rotate relative to the support rail. The main reinforcement support member 40 further has a drive member 44 (drive cylinder) attached to the outer surface of the support 30, and a movable blade 45 (movable body) attached to the tip of the drive member 44, passing through the fixed rail 41, and connected to the support rail 42.

[0032] The driving member 44 is, for example, a driving cylinder, and causes a piston rod 44a to extend and retract relative to the cylinder body by allowing hydraulic oil to flow in and out from a hydraulic pump (not shown). The driving member 44 is not limited to a hydraulic cylinder, but may be a hydraulic actuator other than a hydraulic cylinder. Alternatively, it is not limited to a hydraulic actuator, and may be any driving member that can move the main reinforcement bearing roller 43 in the horizontal direction. The movable blade 45 is a movable body that moves horizontally in accordance with the driving operation of the driving member 44, and passes through the fixed rail 41 and is connected to the support rail . More specifically, a long through-groove is formed in the bottom surface of fixed rail 41, extending along the length of fixed rail 41. Movable blade 45 penetrates the bottom surface of fixed rail 41 and can move together with support rail 42 along the fixed rail.

[0033] With the above configuration, as shown in Figures 6A and 6B, the main reinforcement receiving roller 43 can move relative to the main body of the main reinforcement holding member 50 between a "separate position" away from the main reinforcement B2 and a "receiving position" where it can receive the main reinforcement B2. By doing so, after the assembly work of the reinforcing bar cage B is completed, the main reinforcement support roller 43 can be moved from the "support position" to the "separated position", making it easy to lift the reinforcing bar cage B vertically using a lifting device such as a crane.

[0034] As shown in FIG. 7A, the main reinforcement holding member 50 is provided at a position different from the main reinforcement receiving member 40 on the outer surface of the support 30, and is a member that holds the main reinforcement B2. The main reinforcement holding member 50 is disposed slightly above the main reinforcement receiving member 40, and is disposed closer to the center than the main reinforcement receiving member 40 in the longitudinal direction of the main reinforcement B2.

[0035] Specifically, the main reinforcement retaining member 50 has a driving member 51 (driving cylinder) arranged on the outer surface of the support 30, and a U-shaped main reinforcement retaining portion 52 attached to the tip of the driving member 51 and clamping the main reinforcement B2 from the outside. The driving member 51 is a driving cylinder, and causes a piston rod 51a to extend and retract relative to the main body of the driving member. The main reinforcement holding portion 52 is attached to the tip of the piston rod 51a and has a main body wall portion 52a that is long in the vertical direction, and protruding wall portions 52b and 52c that protrude from both vertical ends of the main body wall portion 52a and clamp the main reinforcement B2 in the vertical direction.

[0036] With the above configuration, as shown in FIG. 7A, the main reinforcement-reinforcement-holding portion 52 can move relative to the main body of the main reinforcement-holding member 50 between a "separate position" away from the main reinforcement B2 and a "holding position" where the main reinforcement B2 can be held.

[0037] As shown in Figures 7A and 7B, the lifting device 60 is attached to the outer surface of the support 30, and is positioned to support the main reinforcement holding member 50 from below, supporting the main reinforcement holding member 50 so that it can move up and down. Specifically, the lifting device 60 has a drive member 61 (drive cylinder) attached to the outer surface of the support 30 via a bracket not shown, and a support member 62 attached to the tip of the drive member 61 and supporting the main reinforcement holding member 50. The driving member 61 is a driving cylinder, but is not particularly limited to this, and may be any driving member that can move the main reinforcement holding member 50 in the vertical direction. The support member 62 is attached to the tip end of the piston rod 61 a and extends longitudinally along the length of the main reinforcement holding member 50 .

[0038] With the above configuration, the lifting device 60 can move the main reinforcement holding portion 52 between the "reference position" shown in FIG. 7A and the "moved position" shown in FIG. 7B, which is moved above the reference position. At this time, when the main reinforcement holding member 50 holds the main reinforcement B2 and the main reinforcement B2 is attached to the hoop reinforcement B1, as shown in Figure 7B, as the main reinforcement holding member 50 moves upward, the main reinforcement B2 and the hoop reinforcement B1 rotate along the circumferential direction of the hoop reinforcement B1.

[0039] As shown in FIGS. 6A and 6B, the second main reinforcement holding member 70 is provided at a position different from the main reinforcement receiving member 40 and the main reinforcement holding member 50 on the outer surface of the column 30, and is a member that holds the main reinforcement B2. More specifically, the second main reinforcement holding member 70 is disposed slightly above the main reinforcement receiving member 40, and is disposed slightly closer to the center than the main reinforcement receiving member 40 in the longitudinal direction of the main reinforcement B2. The second main reinforcement retaining members 70 are disposed at the same height as the main reinforcement retaining members 50, and are disposed further outward than the main reinforcement retaining members 50 in the longitudinal direction of the main reinforcement B2.

[0040] The second main reinforcement holding member 70 has the same configuration as the main reinforcement holding member 50, and includes a drive member 71 and a U-shaped second main reinforcement holding portion 72. As shown in Figures 6A and 6B, the second main reinforcement holding part 72 can move relative to the main body of the second main reinforcement holding member 70 between a "separate position" away from the main reinforcement B2 and a "holding position" where it can hold the main reinforcement B2.

[0041] As shown in Figures 1, 6A and 6B, the positioning member 80 is provided at a position outside the main reinforcement support member 40 in the longitudinal direction of the main reinforcement B2, and is a member that positions the main reinforcement B2 in the longitudinal direction by abutting against the longitudinal end face of the main reinforcement B2 supported by the main reinforcement support member 40. The positioning member 80 is a rectangular positioning plate, and is attached to the outer surface of the support 30 via a bracket (not shown). That is, the contact surface 81 of the positioning member 80 is disposed at a position spaced a certain distance from the support 30 in the longitudinal direction of the main reinforcement B2 (a certain distance away). By bringing the main reinforcements B2 into contact with the contact surface 81 of the positioning member 80, the main reinforcements B2 can be bound at appropriate positions on the circumferential surface of each hoop reinforcement B1.

[0042] In the above configuration, as shown in Fig. 1, the positioning member 80 is disposed at a peripheral position of the main reinforcement receiving member 40. The length of the contact surface 81 in the vertical direction is formed to be smaller than the length of the support 30. The contact surface 81 is also formed to be narrower than the hoop retaining member 20 in the width direction. In other words, the positioning member 80 (contact surface 81) has a relatively compact size. By doing so, the size of the reinforcing bar cage assembling device 1 can be reduced.

[0043] The positioning member 80 may be a movable positioning member that can move in the longitudinal direction of the main reinforcement B2 relative to the support 30. This makes it possible to determine the position of the main reinforcement B2 more accurately.

[0044] With the reinforcing bar cage assembling device 1, as shown in FIG. 7B, after first main reinforcement B2 is attached to the circumferential surface of hoop reinforcement B1, the main reinforcement holding member 50 holding the first main reinforcement B2 can be moved upward to rotate the multiple hoop reinforcement B1. Then, second main reinforcement B2 can be attached to the circumferential surface of hoop reinforcement B1 at the same height as where the first main reinforcement B2 was attached. By repeating these assembly operations, the worker (reinforcement worker) can perform the main reinforcement attachment work (reinforcement placement work) without moving. In other words, the reinforcing bar placement work can always be performed at a height that is easy for the reinforcing bar placement worker to work at. In addition, for example, by installing multiple robots, the reinforcing bar arrangement work of the hoop reinforcement B1 and the main reinforcement B2 can be automated. In this way, it is possible to realize a reinforcing bar cage assembling device 1 that has a simple structure, yet achieves labor-saving work and is capable of assembling the reinforcing bar cage B efficiently.

[0045] <How to assemble the rebar cage> Next, a reinforcing bar cage assembling method using the reinforcing bar cage assembling device 1 will be described in order based on Figs. 8A to 8D. Assembly (1) to assembly (16) shown in Figs. 8A to 8D illustrate the flow of a series of operations in the reinforcing bar cage assembly method. In the assembly (1) to assembly (16), the white painted main reinforcement B2 means that the main reinforcement B2 is in the "non-attached state" where it is not tied to the hoop reinforcement B1. The black painted main reinforcement B2 means that the main reinforcement B2 is in the "attached state" where it is tied to the hoop reinforcement B1.

[0046] Assembly (1) shown in Figure 8A shows a state in which multiple hoops B1 are arranged horizontally at predetermined intervals on the hoop holding member 20, and a first main reinforcement B2 is placed on the main reinforcement receiving member 40. Also shown is a state in which the first main reinforcement B2 is attached to the inner peripheral surface of the hoop B1. The hoop retaining members 20 are not shown in the drawings.

[0047] Next, in assembly (2), the main reinforcement holding portion 52 moves horizontally from a "separate position" away from the main reinforcement B2 to a "holding position" where it can hold the main reinforcement B2, and holds the first main reinforcement B2 placed on the main reinforcement receiving member 40. Assembly (3) shows the state in which the lifting device 60 has moved the main reinforcement holding member 50 upward from the "reference position" to the "movement position." Also shown is the state in which the second main reinforcement B2 has been placed on the main reinforcement receiving member 40. At this time, the main reinforcement holding member 50 holds the main reinforcement B2, and the main reinforcement B2 is attached to the hoop reinforcement B1. Therefore, as the main reinforcement holding member 50 moves upward, the main reinforcement B2 and the hoop reinforcement B1 rotate along the circumferential direction of the hoop reinforcement B1. Assembly (4) shows the state in which the second main reinforcement B2 is attached to the inner peripheral surface of the hoop reinforcement B1 after rotation.

[0048] Next, in assembly (5) shown in FIG. 8B, the main reinforcement holding part 52 moves horizontally from the "holding position" to the "separated position" and is separated from the first main reinforcement B2. At this time, since the main reinforcement receiving member 40 supports the second main reinforcement B2 in the attached state, the hoop reinforcement B1 does not rotate on its axis. Assembly (6) shows the state in which the lifting device 60 has moved the main reinforcement retaining member 50 downward from the "movement position" to the "reference position." Assembly (7) shows the state in which the main reinforcement holding portion 52 has moved horizontally from the "separate position" to the "holding position" and is holding the second main reinforcement B2 placed on the main reinforcement receiving member 40. Assembly (8) shows the state in which the lifting device 60 has moved the main reinforcement holding member 50 upward from the "reference position" to the "movement position." Also shown is the state in which the third main reinforcement B2 has been placed on the main reinforcement receiving member 40. In this way, the fourth main reinforcement B2 and the fifth main reinforcement B2 are attached to the inner peripheral surface of the hoop reinforcement B1 while rotating the hoop reinforcement B1 in the circumferential direction.

[0049] 8C shows the state in which the lifting device 60 has moved the main reinforcement holding member 50 holding the fifth main reinforcement B2 upward from the "reference position" to the "movement position." Also shown is the state in which the sixth main reinforcement B2 has been placed on the main reinforcement receiving member 40. Assembly (10) shows the state in which the sixth main reinforcement B2 is attached to the inner peripheral surface of the hoop reinforcement B1 after rotation. Also, the state in which the second main reinforcement holding part 72 moves horizontally from the "holding position" to the "separated position" and holds the sixth main reinforcement B2 is shown.

[0050] Next, in assembly (11), the main reinforcement holding part 52 moves horizontally from the "holding position" to the "separated position" and is shown to be in a state where it is separated from the fifth main reinforcement B2. At this time, the second main reinforcement holding member 70 holds the sixth main reinforcement B2 in an attached state, so the hoop reinforcement B1 does not rotate on its axis. If the second main reinforcement holding member 70 does not hold the sixth main reinforcement B2, the hoop reinforcement B1 will rotate in the circumferential direction in the opposite direction to the main reinforcement receiving member 40 (counterclockwise as viewed in the drawing). Therefore, when a certain number or more of main reinforcements B2 are attached to the hoop reinforcement B1, either the main reinforcement holding member 50 or the second main reinforcement holding member 70 must always hold the main reinforcements B2. Assembly (12) shows the state in which the lifting device 60 has moved the main reinforcement retaining member 50 downward from the "movement position" to the "reference position."

[0051] Next, in assembly (13), the main reinforcement holding part 52 moves horizontally from the "holding position" to the "separated position" and holds the sixth main reinforcement B2. Also, the second main reinforcement holding part 72 moves horizontally from the "holding position" to the "separated position" and moves away from the sixth main reinforcement B2. In other words, the retaining member that retains the sixth main reinforcement B2 is switched between the main reinforcement retaining member 50 and the second main reinforcement retaining member 70. Assembly (14) shows the state in which the lifting device 60 has moved the main reinforcement holding member 50 holding the sixth main reinforcement B2 upward from the "reference position" to the "movement position." Also shown is the state in which the seventh main reinforcement B2 has been placed on the main reinforcement receiving member 40. In this way, either the main reinforcement holding member 50 or the second main reinforcement holding member 70 always holds the main reinforcement B2, while the hoop reinforcement B1 is rotated circumferentially to attach new main reinforcement B2 to the inner surface of the hoop reinforcement B1.

[0052] Next, in assembly (15), the lifting device 60 moves the main reinforcement holding member 50 holding the ninth main reinforcement B2 upward from the "reference position" to the "moving position." Also shown is the state in which the final tenth main reinforcement B2 has been placed on the main reinforcement receiving member 40. Assembly (16) shows the state in which the tenth and final main reinforcement B2 has been attached to the inner peripheral surface of the hoop reinforcement B1. It also shows the state in which the main reinforcement holding part 52 has moved horizontally from the "holding position" to the "separating position," and the main reinforcement support roller 43 has moved horizontally from the "receiving position" to the "separating position." In this way, the assembly work of the reinforcing bar cage B is completed, and the completed reinforcing bar cage B is lifted upward by a lifting device such as a crane.

[0053] Next, the working steps of the reinforcing bar cage assembling method will be described with reference to FIG. First, as shown in FIG. 9, the process starts with the "hoop placement process" (step S1) in which a worker places a plurality of hoops B1 on the hoop holding member 20 so that they are arranged horizontally at predetermined intervals.

[0054] Thereafter, a worker performs a "main reinforcement placement process" in which the main reinforcement B2 is placed on the main reinforcement support member 40 (step S2), and then performs a "main reinforcement installation process" in which the main reinforcement B2 supported by the main reinforcement support member 40 is attached to the inner surface of each hoop reinforcement B1 held by the hoop reinforcement holding member 20 (step S3).

[0055] Thereafter, a worker performs a "main reinforcement moving step" in which the main reinforcement holding member 50 holding the main reinforcement B2 is moved upward by the lifting device 60 (step S4). In this "main reinforcement moving process," the main reinforcement holding member 50 is moved upward, thereby moving the main reinforcement B2 upward and rotating each hoop reinforcement B1 connected to the main reinforcement B2 in the circumferential direction of the hoop reinforcement B1.

[0056] Thereafter, a worker performs a "second main reinforcement placement process" in which new main reinforcement B2 is placed on the main reinforcement support member 40 (step S5), and then performs a "second main reinforcement installation process" in which new main reinforcement B2 supported by the main reinforcement support member 40 is attached to the inner surface of each hoop reinforcement B1 (step S6). In this way, the worker rotates each hoop B1 in the circumferential direction while attaching new main reinforcements B2 to the inner peripheral surface of each hoop B1 in sequence.

[0057] Thereafter, when the worker has completed the work of attaching all the main reinforcements B2 to the inner peripheral surfaces of the hoop reinforcements B1 (Step S7: Yes), the series of work steps is completed. On the other hand, if the worker has not finished attaching all the main reinforcements B2 to the inner peripheral surface of each hoop B1 (Step S7: No), a "second main reinforcement moving step" is performed in which the main reinforcement holding member 50 holding the main reinforcements B2 is moved upward by the lifting device 60 (Step S8), and the process returns to Step S5. In other words, the worker attaches the remaining main reinforcements B2 to the inner peripheral surface of each hoop B1.

[0058] The above-described reinforcing bar cage assembly method allows for efficient assembly of the reinforcing bar cage B without using a large crane, compared to conventional methods for assembling cast-in-place concrete piles. It also reduces the labor required by workers. Furthermore, even in a site environment where large trucks cannot enter the work site, it is possible to use the reinforcing bar cage assembling device 1 at the work site to assemble the reinforcing bar cage B.

[0059] Furthermore, the above-described reinforcing bar cage assembling method does not require the use of flare welding at the work site or factory, and allows for the favorable assembly of reinforcing bar cage B using welded closed shear reinforcement bars, ensuring improved quality of the reinforcing bar cage B. Furthermore, it also makes it easier to perform processing work in the factory in accordance with the location, road conditions, and construction conditions of the planned construction site.

[0060] Furthermore, by using high-strength rebars, pile members with high strength and toughness can be realized without lowering the rebar ratio compared to JIS rebars. Also, by adopting high-strength shear reinforcement bars in response to the recent trend toward thicker and stronger main bars, it is possible to achieve a balance between the components.

[0061] Furthermore, since welded closed shear reinforcement is used in the assembly of the reinforcing cage B, the assembly work is generally carried out in the factory. By using high-strength shear reinforcement steel, it becomes easier to maintain the circular shape during assembly, even if the pile diameter is large, and it is possible to reduce the weight of the reinforcing cage B. It can also improve the workability of the cast-in-place concrete pile construction itself.

[0062] <Other embodiments> In the above embodiment, as shown in Figures 6A and 6B, the second main reinforcement retaining member 70 is arranged horizontally, and the second main reinforcement retaining part 72 moves horizontally between the "separated position" and the "retained position," but this is not particularly limited. For example, as shown in Figure 10, the second main reinforcement retaining member 70 may be arranged along the inclined direction (diagonally downward), and the second main reinforcement retaining part 72 may move diagonally downward from the "separated position" to the "retained position." For example, the second main reinforcement holding member 70 may be arranged along an inclined direction (diagonally upward), and the second main reinforcement holding part 72 may move diagonally upward from the "separated position" to the "holding position." The main reinforcement retaining member 50 may also have a similar configuration.

[0063] In the above embodiment, as shown in Figures 6A and 6B and Figures 7A and 7B, the main reinforcement retaining member 50 (second main reinforcement retaining member 70) has a U-shaped main reinforcement retaining portion 52 (second main reinforcement retaining portion 72), but this is not particularly limited. For example, the main reinforcement holding portion 52 (second main reinforcement holding portion 72) may have a Y-shape, or may have various shapes as long as they are capable of clamping the main reinforcement B2.

[0064] In the above embodiment, as shown in FIG. 7B, the main reinforcement holding member 50 is movable in the vertical direction, but not only the main reinforcement holding member 50 but also the second main reinforcement holding member 70 may be movable in the vertical direction in the same manner. Furthermore, the first hoop retaining portion 24A and the second hoop retaining portion 24B are movable in the vertical direction, but the third hoop retaining portion 24C may also be movable in the vertical direction in the same manner.

[0065] In the above embodiment, as shown in Figures 6A and 6B, the main reinforcement support roller 43 can move horizontally between the "separated position" and the "support position," but this is not particularly limited, and the main reinforcement support roller 43 does not have to be movable. In this case, it is preferable that the support 30 or the hoop holding member 20 has a mechanism that allows it to move horizontally relative to the reinforcing bar cage B. Alternatively, it is preferable that the reinforcing bar cage assembling device 1 has a mechanism that allows it to move horizontally. This makes it easy to lift the completed reinforcing bar cage B vertically using a lifting device such as a crane.

[0066] In the above embodiment, the hoop B1 is a welded closed type shear reinforcement, and if the weld bump of the hoop B1 becomes somewhat large, the hoop retaining member 20 may not be able to properly retain the hoop B1 so that it can rotate. Therefore, it is preferable to use a hoop reinforcement B1 from which the weld bumps have been removed. Alternatively, when the hoop B1 rotates circumferentially, the hoop holding member 20 (height link device 23) may raise and lower the hoop holding portion 24 at the timing when the weld bump of the hoop B1 comes into contact with the hoop holding portion 24, thereby controlling the hoop holding portion 24 to overcome the weld bump.

[0067] In the above embodiment, the reinforcing bar cage assembling device and the reinforcing bar cage assembling method according to the present invention have been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof. [Explanation of symbols]

[0068] B Reinforced concrete cage B1 hoop muscle B2 Main reinforcement 1 Reinforced concrete cage assembly device 10 Sending table 11 Table body 12 Feed roller (rotating roller) 20 Hoop retaining member 21 Fixed Frame 22 Moving Frame 23 Height link device 24, 24A to 24C: Hoop retaining section, 1st to 3rd hoop retaining sections 24a Convex part 24b Recess 25 Rail device 25a fixed rail 25b First Slider 25c 2nd slider 25d rotation axis 25e Rotating roller 30 pillars 31 Bracket 40 Main reinforcement support member 41 Fixed rail 42 Support Rail 43 Main reinforcement roller (main reinforcement support part) 44 Driving member (driving cylinder) 44a Piston rod 45 Movable blade (movable body) 50 Main reinforcement retaining member 51 Driving member 51a Piston rod 52 Main reinforcement holding section 52a Main body wall 52b, 52c Projecting wall part 60 Lifting device 61 Driving member 61a Piston rod 62 Support member 70 Second main reinforcement retaining member 71 Driving member 72 2nd main bar holding section 80 Positioning member (positioning plate) 81 Contact surface

Claims

1. A reinforcing bar cage assembling device for assembling a reinforcing bar cage having a plurality of frame-shaped hoops and a plurality of long main reinforcements attached along the circumferential surface of the hoops, a hoop holding member that positions the plurality of hoops so that they are arranged at predetermined intervals in the horizontal direction and holds the positioned plurality of hoops so that they can rotate in the circumferential direction of the hoops; a main reinforcement support member that supports the main reinforcements from below at a position where the main reinforcements can be attached to the peripheral surfaces of the plurality of hoop reinforcements held by the hoop reinforcement holding member; a main reinforcement holding member provided at a position different from the main reinforcement receiving member and holding the main reinforcement; a lifting device that moves the main reinforcement holding member in the up and down direction, The main reinforcement holding member has a main reinforcement holding portion that holds the main reinforcement, The reinforcing bar cage assembling device is characterized in that the main reinforcement holding portion is attached to the main body of the main reinforcement holding member so as to be movable between a holding position where it can hold the main reinforcement and a spaced position away from the main reinforcement.

2. a second main reinforcement holding member provided at a position different from the main reinforcement receiving member and the main reinforcement holding member and holding the main reinforcement; The main reinforcement holding member holds the first main reinforcement attached to the peripheral surface of the hoop reinforcement at a position above the main reinforcement receiving member, 2. The reinforcing bar cage assembling device according to claim 1, wherein the second main reinforcement holding member holds the second main reinforcement attached to the peripheral surface of the hoop reinforcement.

3. The main reinforcement receiving member has a main reinforcement receiving portion that supports the main reinforcement, the main reinforcement receiving portion is attached to the main body of the main reinforcement receiving member so as to move between a support position where it can support the main reinforcement and a spaced position away from the main reinforcement, the second main reinforcement holding member has a second main reinforcement holding portion that holds the main reinforcement, The reinforcing bar cage assembly device according to claim 2, characterized in that the second main reinforcement holding portion is attached to the main body of the second main reinforcement holding member so as to be movable between a holding position where it can hold the main reinforcement and a spaced position away from the main reinforcement.

4. The hoop retaining member has a plurality of hoop retaining portions that retain the hoop from below, The plurality of hoop retaining portions are The hoop retainer is attached to the main body of the hoop retainer so as to be movable in the up and down direction, and The reinforcing bar cage assembly device according to any one of claims 1 to 3, characterized in that it is attached to the main body of the hoop reinforcement holding member so as to be movable in directions perpendicular to the longitudinal direction and the vertical direction of the main reinforcement.

5. a positioning member that is provided at a position outside the main reinforcement support member in the longitudinal direction of the main reinforcement and abuts against an end face in the longitudinal direction of the main reinforcement supported by the main reinforcement support member, thereby positioning the main reinforcement in the longitudinal direction; The positioning members are arranged at peripheral positions of the main reinforcement receiving members, The reinforcing bar cage assembly device according to any one of claims 1 to 4, characterized in that the contact surface of the positioning member that contacts the end face of the main reinforcement is formed so as to be narrower than the hoop reinforcement holding member in directions perpendicular to the longitudinal direction and the vertical direction of the main reinforcement.

6. A reinforcing bar cage assembling method using the reinforcing bar cage assembling device according to any one of claims 1 to 5, a hoop arrangement step of arranging the plurality of hoops on the hoop holding member so as to be aligned at predetermined intervals in a horizontal direction; a main reinforcement placement step of placing the main reinforcement on the main reinforcement receiving member; a main reinforcement attaching step of attaching the main reinforcements supported by the main reinforcement receiving members to the peripheral surfaces of the plurality of hoop reinforcements held by the hoop reinforcement holding members; a main reinforcement moving step of moving the main reinforcement holding member that holds the main reinforcement upward by the lifting device, In the main reinforcement moving step, the main reinforcement is moved upward by moving the main reinforcement holding member upward, and the plurality of hoop reinforcements connected to the main reinforcement are each rotated in the circumferential direction of the hoop reinforcement.

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