Rebar holder

Abstract

To increase holding power of each reinforcement of a reinforcement holding tool which holds crossing two reinforcements.SOLUTION: A reinforcement holding tool comprises: two pressing plates 11, 12 disposed in a state where tip edges become near each other and a separation distance gradually increases as moving toward the other end edge; a plate spring portion 13 elastically urging each pressing plate so as to keep a closed position and allowing each tip edge to widen when applied with an opening power; and two locking members 21, 22 for locking a first reinforcement each of which is pivotally supported so as to rotate by pivotally supporting portions 15, 17 provided at positions near each tip of each pressing plate. A center portion of each tip edge of each pressing plate is provided with engagement recesses 14, 16 respectively capable of supporting a first reinforcement by engagement at the same time. In a nipping space SP between the first reinforcement RB1 supported by each engagement recess by engagement and each tip edge of each pressing plate, a second reinforcement RB2 can be engaged in a posture of crossing the first reinforcement while widening each pressing plate. In a state where the second reinforcement is supported by nipping in the nipping space, each locking member locks the first reinforcement.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rebar retainer. [Background technology]

[0002] Reinforced concrete structures use reinforcing bars as the core material to reinforce concrete, which is weak in tension. In reinforced concrete structures, the core material is, for example, a lattice of main bars and shear reinforcement bars (hoops, stirrups) or a lattice of reinforcing bars. If the rebars are significantly displaced from their designated positions during concrete pouring, the designed strength may not be achieved, so the rebars are tied together at the points where they cross. For example, bundling wire (gauge wire) is used to tie the rebars together, but tying them together using wire is time-consuming and requires skill. In order to simplify the task of bundling reinforcing bars together, for example, Patent Document 1 discloses a reinforcing bar spacer that crimps (presses) a first reinforcing bar and a second reinforcing bar that crosses the first reinforcing bar. This reinforcing bar spacer includes a spacer body made of concrete or mortar, and a mounting bracket that is rotatably attached to the spacer body, and the spacer body has a groove into which the first reinforcing bar is fitted. The mounting bracket is made of steel wire, and holds the second reinforcing bar that crosses the first reinforcing bar in the groove while biasing it toward the first reinforcing bar. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] WO2019 / 064404 Brochure Summary of the Invention [Problem to be solved by the invention]

[0004] In the reinforcing bar spacer described in Patent Document 1, the second reinforcing bar is held only by a mounting bracket made of steel wire, which makes it easy for excessive load to be placed on the mounting bracket, and there is a risk that the holding force for the second reinforcing bar will be reduced. The present invention has been made in view of the above circumstances, and an object of the present invention is to increase the holding force of the first reinforcing bar and the second reinforcing bar. [Means for solving the problem]

[0005] In order to solve the above problems, the present invention provides a reinforcing bar holder that clamps and holds a first reinforcing bar and a second reinforcing bar in a crossed state, the reinforcing bar holder comprising a first pressure plate and a second pressure plate that are arranged so that their leading edges are close to or in contact with each other and the distance between them gradually increases toward the other end edge opposite the leading edges, an elastic biasing member that elastically biases the first and second pressure plates to maintain a closed position in which the leading edges are close to or in contact with each other and holds the first and second pressure plates to allow them to open from the closed position when an opening force against the elastic biasing force is applied, and a first reinforcing bar that is pivotally supported by pivotal support parts provided near the leading edges of the first and second pressure plates so as to be freely rotatable along a track parallel to a plane perpendicular to the plate surface of each pressure plate. The present invention is characterized in that the first and second pressure plates are provided with a first locking member and a second locking member for locking the reinforcing bar, and a first fitting recess and a second fitting recess are respectively formed in the center of each leading edge of the first and second pressure plates, which are notched toward the other edge and can simultaneously fit and support the first reinforcing bar, and the second reinforcing bar can be fitted into a clamping space between the first reinforcing bar, which is fitted and supported by the first and second fitting recesses, and the leading edges of the first and second pressure plates, in a position intersecting the first reinforcing bar and while the first and second pressure plates are expanded, and when the first reinforcing bar is inserted across the first and second fitting recesses and the second reinforcing bar is held clamped in the clamping space, each locking member locks the first reinforcing bar. Effect of the Invention

[0006] According to the present invention, the holding force of the first reinforcing bar and the second reinforcing bar can be increased. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view illustrating a state in which first and second reinforcing bars are held by the reinforcing bar holder of this embodiment. [Diagram 2] 1 is a cross-sectional view illustrating columns, beams, slabs, and walls in a reinforced concrete building. [Diagram 3] (a) is a front view of the rebar holder, (b) is a left side view of the rebar holder, (c) is a right side view of the rebar holder, (d) is a back view of the rebar holder, (e) is a plan view of the rebar holder, and (f) is a bottom view of the rebar holder. [Figure 4] 1A and 1B are diagrams illustrating a procedure for installing a reinforcing bar holder, in which (a) is a left side view showing the state before installation, and (b) is a front view showing the state before installation. [Diagram 5] 1A and 1B are diagrams explaining the procedure for installing the reinforcing bar holder, in which (a) is a left side view showing the state in which each pressure plate has been spread open and the reinforcing bar holder has been moved partway toward the base end, and (b) is a front view showing the state in which each pressure plate has been spread open and the reinforcing bar holder has been moved partway toward the base end. [Figure 6] 1A and 1B are diagrams explaining the procedure for installing the reinforcing bar holder, in which (a) is a left side view showing the state in which each pressure plate has been spread open and the reinforcing bar holder has been moved to the end in the base end direction, and (b) is a front view showing the state in which each pressure plate has been spread open and the reinforcing bar holder has been moved to the end in the base end direction. [Figure 7] 1A and 1B are diagrams illustrating the procedure for installing the reinforcing bar holder, where (a) is a left side view illustrating the state in which the first reinforcing bar is engaged by the tip end of each locking member, and (b) is a front view illustrating the state in which the first reinforcing bar is engaged by each locking portion of each locking member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, unless otherwise specified, the components, types, combinations, shapes, relative positions, and the like described in the embodiment are merely illustrative examples and do not intend to limit the scope of the present invention.

[0009] <Outline of rebar holder 1> First, there will be described an overview of the reinforcing bar holder 1. Fig. 1 is a perspective view illustrating a state in which first and second reinforcing bars RB1 and RB2 are held by the reinforcing bar holder 1 of this embodiment. As shown in FIG. 1, the reinforcing bar holder 1 of this embodiment is used as a core material for reinforced concrete structure, and is a tool for clamping and holding a first reinforcing bar RB1 and a second reinforcing bar RB2 that intersect with each other at their intersection.

[0010] This reinforcing bar retainer 1 comprises a first pressure plate 11 and a second pressure plate 12 arranged such that leading edges 11a, 12a are close to or in contact with each other and the distance between them gradually increases toward the base edges 11b, 12b (see FIG. 3(b)) opposite the leading edges 11a, 12a, and the pressure plates 11, 12 are elastically biased to maintain the leading edges 11a, 12a in a closed position (see FIG. 3(b)) close to or in contact with each other. Both are equipped with a leaf spring portion 13 (elastically biasing member) that holds the plate so as to allow it to open from the closed position when an opening force is applied against the elastic biasing force, and first and second engaging members 21, 22 for engaging the first rebar, which are supported by first and second pivot portions 15, 17 provided at positions near the respective tip edges 11a, 12a of each pressure plate 11, 12 so as to be freely rotatable along a trajectory parallel to a plane perpendicular to the plate surfaces of each pressure plate 11, 12. At the left and right central portions of each leading edge 11a, 12a of each pressure plate 11, 12, first and second mating recesses 14, 16 are provided which are notched toward the other end edges 11b, 12b and can simultaneously fit and support the first reinforcing bar RB1.In the clamping space SP between the first reinforcing bar RB1 fitted and supported by each fitting recess 14, 16 and each leading edge 11a, 12a of each pressure plate 11, 12, the second reinforcing bar RB2 can be fitted in a position intersecting the first reinforcing bar RB1 while spreading out each pressure plate 11, 12. Furthermore, in a state in which the first reinforcing bar RB1 is inserted across and through each of the fitting recesses 14, 16 and the second reinforcing bar RB2 is clamped and held in the clamping space SP, each of the locking members 21, 22 locks the first reinforcing bar RB1.

[0011] According to the reinforcing bar holder 1 of this embodiment, each pressure plate 11, 12 elastically biased by the leaf spring portion 13 clamps and holds the second reinforcing bar RB2 in the clamping space SP and presses it against the first reinforcing bar RB1 in each mating recess 14, 16, and each locking member 21, 22 locks the first reinforcing bar RB1, so that the cooperation of each pressure plate 11, 12 and each locking member 21, 22 can increase the holding force of the first reinforcing bar RB1 and the second reinforcing bar RB2.

[0012] <About the use of rebar retainer 1> Prior to a detailed description of the rebar holder 1, an explanation will be given of an object for which the rebar holder 1 is to be used, specifically, a reinforced concrete building 100. Fig. 2 is a cross-sectional view illustrating a column 100, a beam 120, a slab 130, and a wall 140 in the reinforced concrete building 100. As described above, the reinforcing bar holder 1 is a tool for clamping and holding two reinforcing bars in a crossed state. In a building 100 with a reinforced concrete structure shown in Fig. 2, reinforcing bars are used as core materials 111, 121, 131, and 141 to reinforce concrete that is weak against tension. For example, in a column 100 or a beam 120, a plurality of main reinforcements 112 and 122 are arranged along the longitudinal direction of the column 100 or the beam 120, and shear reinforcement bars (hoops 113 in the column 100 and stirrups 123 in the beam 120) are arranged in a direction intersecting the main reinforcements 112 and 122. In a slab 130 or a wall 140, a plurality of reinforcing bars 132, 133, 142, and 143 arranged in a lattice pattern are used as core materials 131 and 141. In this embodiment, the main reinforcements 112, 122 and the reinforcing bars 132, 142 correspond to the first reinforcing bar RB1, and the hoop bars 113, the stirrup bars 123 and the reinforcing bars 133, 143 correspond to the second reinforcing bars RB2. When constructing a reinforced concrete building 100, formwork is installed around the core members 111, 121, 131, and 141, unhardened concrete is poured into the formwork, and the formwork is removed after the concrete has hardened. By attaching rebar holders 1 to the points where the rebars intersect before pouring the concrete, the inconvenience of the rebars becoming misaligned during pouring of the concrete is prevented.

[0013] <Structure of rebar holder 1> Next, we will explain the structure of the reinforcing bar retainer 1. Fig. 3(a) is a front view of the reinforcing bar retainer 1, Fig. 3(b) is a left side view of the reinforcing bar retainer 1, Fig. 3(c) is a right side view of the reinforcing bar retainer 1, Fig. 3(d) is a rear view of the reinforcing bar retainer 1, Fig. 3(e) is a plan view of the reinforcing bar retainer 1, and Fig. 3(f) is a bottom view of the reinforcing bar retainer 1. As shown in Figure 3, the reinforcing bar holder 1 comprises a main body 10 which fits and holds the first reinforcing bar RB1 in each of the fitting recesses 14, 16 and clamps and holds the second reinforcing bar RB2 that intersects with the first reinforcing bar RB1 in the clamping space SP, and locking members 20 (first locking member 21, second locking member 22) which are respectively supported by first and second support portions 15, 17 of the main body 10 and lock the first reinforcing bar RB1 fitted and held in each of the fitting recesses 14, 16.

[0014] <Regarding the main body 10> The main body 10 is made of a thin elastic steel plate, for example, a steel plate having a thickness of 0.5 mm. The main body 10 comprises a first pressure plate 11 arranged on the front side, a second pressure plate 12 arranged on the rear side, a leaf spring portion 13 provided between the base edge 11b of the first pressure plate 11 and the base edge 12b of the second pressure plate 12 and elastically biasing each pressure plate 11, 12 so that the tip edge 11a of the first pressure plate 11 and the tip edge 12a of the second pressure plate 12 approach or abut each other, a first pivot support portion 15 provided on the first pressure plate 11 side and pivotally supporting the base end 21a of the first locking member 21, and a second pivot support portion 17 provided on the second pressure plate 12 side and pivotally supporting the base end 22a of the second locking member 22.

[0015] The first pressure plate 11 has a horizontally elongated rectangular shape with a horizontal (left-right) length of 50 mm and a vertical (tip-base) length of 32 mm, and is provided with a first fitting recess 14 cut out from the left-right center of the tip edge 11a toward the base end with a width equal to or slightly wider than the diameter of the first rebar RB1. The first fitting recess 14 has a width of 10 mm and a length of 25 mm, for example, and the innermost end is semicircular. Cylindrical first support portions 15 are provided on both the left and right sides of the first fitting recess 14, continuing from the tip edge 11a of the first pressure plate 11. The first support portion 15 in this embodiment is provided by deforming the tip portion of a steel plate into a cylindrical shape, and has an inner diameter of, for example, 3 mm. The inner diameter of the first pivot support portion 15 is set to a size that allows the base end portion 21a of the first locking member 21 to be rotatably supported. The first pivot support portion 15 may be provided at a position near the tip end of the first pressure plate 11.

[0016] The second pressure plate 12 has a horizontally elongated rectangular shape like the first pressure plate 11, and has a second mating recess 16 provided from the left-right center of the tip edge 12a toward the base end, and a cylindrical second support portion 17 is provided on both the left and right sides of the second mating recess 16. In this embodiment, the dimensions of the second pressure plate 12 are the same as those of the first pressure plate 11, the shape and dimensions of the second fitting recess 16 are the same as those of the first fitting recess 14, and the shape and dimensions of the second pivot support portion 17 are the same as those of the first pivot support portion 15, so detailed explanations will be omitted. Note that the shape and dimensions of each part of the second pressure plate 12 may be different from those of the first pressure plate 11.

[0017] The leaf spring portion 13 has a horizontal (left-right) length that is the same as the lengths of the pressure plates 11 and 12, and a horizontally elongated rectangular shape whose vertical (front-back) length is longer than the diameter of the second rebar RB2, and the vertical center 13c is curved in a concave shape toward the tip side compared to both end edges (front end edge 13a, rear end edge 13b). In this embodiment, for example, the horizontal length of the leaf spring portion 13 is 50 mm, the vertical length is 25 mm, and the maximum depth of the concave is 2 mm. The front end edge 13a of the leaf spring portion 13 is formed continuous with the base end edge 11b of the first pressure plate 11, and the rear end edge 13b is formed continuous with the base end edge 12b of the second pressure plate 12. The boundary portion between the leaf spring portion 13 and the first pressure plate 11 and the boundary portion between the leaf spring portion 13 and the second pressure plate 12 are each curved, and the pressure plates 11, 12 are arranged so that the separation distance gradually decreases from the base end edges 11b, 12b toward the tip edges 11a, 12a (in other words, so that the separation distance gradually increases from the tip edges 11a, 12a toward the base end edges 11b, 12b).

[0018] The leaf spring portion 13 elastically biases the pressure plates 11, 12 so as to maintain the closed position in which the tip edges 11a, 12a of the pressure plates 11, 12 abut against each other when no external force is applied. In the example of Figures 3(b) and (c), when the pressure plates 11, 12 are in the closed position, the leading edges 11a, 12a of the pressure plates 11, 12 abut against each other, but when the pressure plates 11, 12 are in the closed position, the leading edges 11a, 12a may be spaced apart by a width less than the diameter of the second rebar RB2. Although details will be described later, in the reinforcing bar holder 1 of this embodiment, a first reinforcing bar RB1 is inserted across each of the fitting recesses 14, 16, and a second reinforcing bar RB2 is placed in a clamping space SP (see FIG. 6(a)) defined by the inner surfaces of each of the pressure plates 11, 12 on the tip side of the first reinforcing bar RB1. The second reinforcing bar RB2 in the clamping space SP is clamped and held by each of the pressure plates 11, 12.

[0019] <Regarding the locking members 21 and 22> Each of the locking members 21, 22 in this embodiment is made by bending a steel wire into a predetermined shape, and locks the first reinforcing bar RB1 fitted in each of the fitting recesses 14, 16, and applies a force to each of the pressure plates 11, 12 to expand each of the tip edges 11a, 12a from the closed position against the elastic force of the leaf spring portion 13. Each of the locking members 21, 22 in this embodiment is made, for example, from round steel with a diameter of 2 mm, and the total length of each of the locking members 21, 22 is 68 mm.

[0020] The first locking member 21 on the side of the first pressure plate 11 will be described. The first locking member 21 includes a base end 21a rotatably supported by the first pivot support 15, a locking portion 21b provided at the tip end portion opposite the base end 21a and locking the first rebar RB1, and an intermediate portion 21c provided between the base end 21a and the locking portion 21c. The base end 21a is provided along the left-right direction, and its length is approximately the same as or slightly shorter than the length of the first pivotal support portion 15. Since the base end 21a is pivotally supported by the first pivotal support portion 15, the first locking member 21 is supported so as to be rotatable along a track parallel to a plane perpendicular to the surface of the first pressure plate 11. The locking portion 21b is a portion in which the steel wire is folded back into a substantially U-shape, and the first reinforcing bar RB1 is placed in the space on the inner circumference side. In this embodiment, the width W21 of the base end of the locking portion 21b (the width at the boundary position with the middle portion 21c) is narrower than the diameter of the first reinforcing bar RB1, and when the first reinforcing bar RB1 is locked in the locking portion 21b, the base end of the locking portion 21b is pressed against the first reinforcing bar RB1, thereby expanding the base end of the locking portion 21b and fitting into the locking portion 21b. The intermediate portion 21c is a portion that connects the left and right inner ends of the base end portion 21a to the base end of the engagement portion 21b, and has a substantially straight shape when viewed from the front, with the tip portion bent forward at an obtuse angle when viewed from the side.

[0021] The first locking member 21 having the above-mentioned shape has a necked portion CS1 formed in the locking portion 21b, the necked portion CS1 having a width narrower than the diameter of the first reinforcing bar RB1. In this embodiment, the first locking member 21 is made of a steel wire bent into a predetermined shape, and therefore can be easily manufactured. In addition, the first locking member 21 has a constricted portion CS1, which can prevent the first reinforcing bar RB1 from falling off the locking portion 21b.

[0022] Next, the second locking member 22 on the second pressure plate 12 side will be described. Similar to the first locking member 21, the second locking member 22 includes a base end 22a rotatably supported by the second pivot support 17, a locking portion 22b provided at the tip end portion opposite the base end 22a and locking the first rebar RB1, and an intermediate portion 22c provided between the base end 22a and the locking portion 22b. The base end 22a, locking portion 22b, intermediate portion 22c, and constricted portion CS2 of the second locking member 22 have the same configuration as the base end 21a, locking portion 21b, intermediate portion 21c, and constricted portion CS1 of the first locking member 21, so their explanation is omitted.

[0023] Each of the locking members 21, 22 locks the first rebar RB1 in each of the locking portions 21b, 22b. The locking members 21, 22 are operated by the user when the leading edges 11a, 12a of the pressure plates 11, 12 are opened against the elastic force of the leaf spring portion 13. As described later in FIG. 4 and FIG. 5, when the locking members 21, 22 are rotated so that the locking portions 21b, 22b are positioned on the base end side of the main body portion 10, and the first locking portion 21b and the second locking portion 22b are brought close to each other, the base end edges 11b, 12b of the pressure plates 11, 12 become fulcrums, and the first pivot portion 15 and the second pivot portion 17 are separated, and the leading edge 11a of the first pressure plate 11 and the leading edge 12a of the second pressure plate 12 are opened.

[0024] <Installation procedure for rebar retainer 1> Next, a description will be given of the procedure for attaching the reinforcing bar holder 1. Figures 4(a) and (b) show the state before attachment, Figures 5(a) and (b) show the state after the pressure plates 11 and 12 have been spread apart and the reinforcing bar holder 1 has been moved partway in the base end direction, Figures 6(a) and (b) show the state after the pressure plates 11 and 12 have been spread apart and the reinforcing bar holder 1 has been moved all the way in the base end direction, and Figures 7(a) and (b) are diagrams explaining the state after the first reinforcing bar RB1 has been locked by the locking parts 21b and 22b of the locking members 21 and 22.

[0025] 4(a) and 4(b), when attaching the reinforcing bar holder 1 to the first reinforcing bar RB1 and the second reinforcing bar RB2, the retaining members 21, 22 are rotated until the middle portions 21c, 22c of the retaining members 21, 22 are aligned with the outer surfaces of the pressure plates 11, 12. After that, the orientation of the reinforcing bar holder 1 is adjusted so that the first reinforcing bar RB1 is fitted into the fitting recesses 14, 16, and the reinforcing bar holder 1 is brought close to the reinforcing bars RB1, RB2. As shown in Figures 5(a) and (b), the first rebar RB1 is fitted halfway into each fitting recess 14, 16, and the locking portions 21b, 22b of the locking members 21, 22 are moved closer together by the operator's fingers to open the gap between the leading edges 11a, 12a of the pressure plates 11, 12 larger than the diameter of the second rebar RB2, and the rebar holder 1 is moved so that the second rebar RB2 is positioned between the leading edges 11a, 12a of the pressure plates 11, 12.

[0026] As shown in Figures 6(a) and (b), when the first reinforcing bar RB1 is inserted deep into each mating recess 14, 16, and fingers are released from each locking portion 21b, 22b of each locking member 21, 22 to allow the elastic force of the leaf spring portion 13 to act on each pressure plate 11, 12, the second reinforcing bar RB2 in the clamping space SP is clamped by each pressure plate 11, 12 and pressed against the first reinforcing bar RB1 fitted and supported in each mating recess 14, 16. As shown in Fig. 7(a) and (b), the locking portions 21b, 22b of the locking members 21, 22 are rotated toward the first rebar RB1 around the base ends 21a, 22a of the locking members 21, 22. As described above, the widths W21, W22 of the boundaries (the constricted portions CS1, CS2) between the locking portions 21b, 22b and the intermediate portions 21c, 22c are narrower than the diameter of the first rebar RB1, so the rotation of the locking members 21, 22 stops at a position where the constricted portions CS1, CS2 are placed on the first rebar RB1. When the locking portions 21b, 22b are pushed toward the first rebar RB1 from this stop position, the constricted portions CS1, CS2 are deformed following the outer peripheral surface of the first rebar RB1, and the first rebar RB1 is positioned on the inner peripheral side of the locking portions CS1, CS2. In this state, each of the constricted portions CS1, CS2 returns to its original position due to its elasticity, and the first rebar RB1 is locked so that it does not easily come off each of the locking portions CS1, CS2.

[0027] The above procedure completes the holding of the reinforcing bars RB1, RB2 by the reinforcing bar holder 1. In a state in which the reinforcing bars RB1, RB2 are held by the reinforcing bar holder 1, the pressure plates 11, 12 elastically biased by the leaf spring portions 13 clamp and hold the second reinforcing bar RB2 in the clamping space SP and press it against the first reinforcing bar RB1 in each of the fitting recesses 14, 16, and the locking members 21, 22 lock the first reinforcing bar RB1, so that the cooperation of the pressure plates 11, 12 and the locking members 21, 22 can increase the holding force of the first reinforcing bar RB1 and the second reinforcing bar RB2. When releasing the reinforcing bars RB1, RB2 from the reinforcing bar holder 1, the above-mentioned installation steps can be carried out in reverse order.

[0028] <About modified examples> In the above embodiment, the reinforcing bar held by the reinforcing bar holder 1 is a reinforcing bar used as a core material in reinforced concrete structures, but the reinforcing bar is not limited to this type of reinforcing bar. In other words, any reinforcing bar may be used as long as it is two reinforcing bars that are clamped and held in a crossed state.

[0029] In the above embodiment, the locking members 21 and 22 are made of steel wires whose ends are folded back into a shape that allows the first reinforcing bar RB1 to be locked in the inner peripheral space, but the shape is not limited to this. In other words, it is sufficient that the locking members 21 and 22 are made into a shape that allows the first reinforcing bar RB1 to be locked.

[0030] [Summary of the embodiments, functions and effects of the present invention] First embodiment This embodiment is a reinforcing bar holder 1 that clamps and holds a first reinforcing bar RB1 and a second reinforcing bar RB2 in a crossed state, and includes a first pressure plate 11 and a second pressure plate 12 that are arranged so that their leading edges 11a, 12a are close to or in contact with each other and the distance between them gradually increases toward the other end edges 11b, 12b opposite the leading edges 11a, 12a, a leaf spring portion 13 (elastically biasing member) that elastically biases each of the pressure plates 11, 12 to maintain a closed position in which the leading edges 11a, 12a are close to or in contact with each other and holds the pressure plates 11, 12 so as to allow them to open from the closed position when an opening force against the elastic biasing force is applied, and a pivot support portion 15, 17 provided near the leading edges 11a, 12a of each of the pressure plates 11, 12 that pivots freely along a trajectory parallel to a plane perpendicular to the plate surface of each of the pressure plates 11, 12. The pressure plates 11, 12 each have a first engaging member 21 and a second engaging member 22 for engaging the first reinforcing bar RB1, and the center of each of the leading edges 11a, 12a of the pressure plates 11, 12 is provided with a first fitting recess 14 and a second fitting recess 16 that are cut out toward the other end edges 11b, 12b and can simultaneously fit and support the first reinforcing bar RB1. The first reinforcing bar RB1 that is fitted and supported by the fitting recesses 14, 16 and the pressure plates 11, In the clamping space SP between the leading edges 11a, 12a of the pressure plates 11, 12, the second reinforcing bar RB2 can be fitted in a position intersecting the first reinforcing bar RB1 and while the pressure plates 11, 12 are expanded, and when the first reinforcing bar RB1 is inserted across each of the fitting recesses 14, 16 and the second reinforcing bar RB2 is held in the clamping space SP, each of the locking members 21, 22 locks the first reinforcing bar RB1. According to the reinforcing bar holder 1 of this embodiment, each pressure plate 11, 12 elastically biased by the leaf spring portion 13 clamps and holds the second reinforcing bar RB2 in the clamping space SP and presses it against the first reinforcing bar RB1 in each mating recess 14, 16, and each locking member 21, 22 locks the first reinforcing bar RB1, so that the cooperation of each pressure plate 11, 12 and each locking member 21, 22 can increase the holding force of the first reinforcing bar RB1 and the second reinforcing bar RB2.

[0031] Second embodiment In the reinforcing bar holder 1 according to this embodiment, each locking member 21, 22 is characterized in that each tip portion (each locking portion 21b, 22b) is made from a steel wire that is folded back into a shape that enables the first reinforcing bar RB1 to be locked in the inner circumferential space. According to the reinforcing bar holding portion of this embodiment, the locking members 21, 22 can be easily manufactured.

[0032] Third embodiment In the reinforcing bar holder 1 according to this embodiment, each of the locking members 21, 22 is characterized in that it has a neck portion (each of the neck portions CS1, CS2) at each tip portion (each of the locking portions 21b, 22b) whose width is narrower than the diameter of the first reinforcing bar RB1. According to the reinforcing bar holding portion of this embodiment, the constricted portion can prevent the first reinforcing bar RB1 from falling off the locking portion 21b. [Explanation of symbols]

[0033] 1...reinforcing bar holder, 10...main body, 11...first pressure plate, 11a...tip edge of first pressure plate, 11b...base edge of first pressure plate, 12...second pressure plate, 12a...tip edge of second pressure plate, 12b...base edge of second pressure plate, 13...leaf spring portion, 14...first fitting recess, 15...first pivot support portion, 16...second fitting recess, 17...second pivot support portion, 20...locking member, 21...first locking member, 21a...base end of first locking member, 21b... fastening portion of first fastening member, 21c... intermediate portion of first fastening member, 22... second fastening member, 22a... base end of second fastening member, 22b... fastening portion of second fastening member, 22c... intermediate portion of second fastening member, 100... building with reinforced concrete structure, 110... column, 120... beam, 130... slab, 140... wall, SP... compression space, CS1... narrowed portion of first fastening member, CS2... narrowed portion of second fastening member

Claims

1. A reinforcing bar holder that clamps and holds a first reinforcing bar and a second reinforcing bar in a crossed state, a first pressure plate and a second pressure plate arranged such that their leading edges are close to or in contact with each other and the distance between them gradually increases toward the other end edge opposite to the leading edges; an elastic biasing member that elastically biases the first and second pressure plates so as to maintain a closed position in which the respective leading edges are close to or in contact with each other, and that holds the first and second pressure plates so as to allow them to open from the closed position when an opening force acts against the elastic biasing force; a first locking member and a second locking member for locking a first reinforcing bar, each of which is pivotally supported by a pivot support provided near the leading edge of each of the first and second pressure plates along a track parallel to a plane perpendicular to the plate surface of each pressure plate; The first and second pressure plates are provided at the center of each leading edge thereof with a first fitting recess and a second fitting recess that are cut out toward the other end edge and can simultaneously fit and support the first reinforcing bar, The second reinforcing bar can be fitted into a clamping space between the first reinforcing bar, which is fitted and supported by the first and second fitting recesses, and the leading edges of the first and second pressure plates, in a position intersecting the first reinforcing bar and while the first and second pressure plates are being expanded, A reinforcing bar retainer characterized in that when the first reinforcing bar is inserted across the first and second mating recesses and the second reinforcing bar is clamped and held in the clamping space, each locking member locks the first reinforcing bar.

2. The reinforcing bar retainer according to claim 1, characterized in that the first and second retaining members are made of steel wire whose tip portions are folded back into a shape that enables the first reinforcing bar to be retained in the inner circumferential space.

3. 3. The reinforcing bar holder according to claim 2, wherein the first and second locking members have a narrowed portion at the tip end, the width of which is narrower than the diameter of the first reinforcing bar.

Images