Reinforcing bar retainer

Abstract

To increase holding power of each reinforcement RB1, RB2 of a reinforcement holding tool 1 which holds crossing two reinforcements.SOLUTION: A reinforcement holding tool 1 comprises: a holding piece 11 which is constituted of a metal plate and which has a holding portion 11c that is formed by bending a part near one end of the metal plate and can hold a first reinforcement RB1; and an engagement recess 12 formed by cutting out with a length shorter than the whole length of the holding piece 11 so as to have a width with which a second reinforcement RB2 can engage, from a tip end edge 11a toward a base end edge 11b of the holding piece 11. The first reinforcement RB1 held by the holding portion 11c is pressure-welded to the second reinforcement RB2 supported by engagement in the engagement recess 12.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a reinforcing bar retainer.

Background Art

[0002] A reinforced concrete structure is a structure in which reinforcing bars are used as a core material to reinforce concrete, which is weak in tension. In a reinforced concrete structure, for example, a structure in which main reinforcing bars and shear reinforcing bars (stirrups, hoop bars) are arranged in a lattice pattern or a structure in which reinforcing bars are arranged in a lattice pattern is used as the core material. When placing concrete, if each reinforcing bar is greatly displaced from a predetermined position, there is a risk that the designed strength cannot be obtained. Therefore, the portions where the reinforcing bars intersect are tied together. For tying the reinforcing bars together, for example, tying wire (binding wire) is used, but tying with wire is time-consuming and requires skill.

[0003]

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the reinforcing bar fixing tool described in Patent Document 1, the reinforcing bars are held by the elastic force of each side plate, and since there was a space between the lower edges of the side plates, when a downward force was applied to each reinforcing bar in the reinforcing bar fixing tool, there was a risk that each reinforcing bar would come off the reinforcing bar fixing tool. The present invention has been made in view of such circumstances, and its object is to enhance the holding force of the first reinforcing bar and the second reinforcing bar.

Means for Solving the Problems

[0006] In order to solve the above problems, the present invention is a reinforcing bar holding tool that holds the first reinforcing bar and the second reinforcing bar in a crossed state, and is composed of a metal plate. A holding piece having a holding portion formed by bending a portion near one end of the metal plate and capable of holding the first reinforcing bar, and a notch is formed from one end edge to the other end edge of the holding piece, having a length shorter than the entire length of the holding piece, and having a width into which the second reinforcing bar can be fitted. The folded piece is provided continuously with the holding piece and is folded back at the other edge of the holding piece, The first reinforcing bar held by the holding portion is pressed against the second reinforcing bar fitted and held in the fitting recess. and the edge of the folded piece on the side opposite to the holding piece can abut against the second reinforcing bar fitted and held in the fitting recess. It is characterized by this.

Effects of the Invention

[0007] According to the present invention, the holding force of the first reinforcing bar and the second reinforcing bar can be enhanced.

Brief Description of the Drawings

[0008]

Figure 1

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Figure 10

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the components, types, combinations, shapes, relative arrangements, etc. described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention thereto without specific description.

[0010] <Overview of the reinforcing bar retainer 1> First, the overview of the reinforcing bar retainer 1 will be described. FIG. 1 is a perspective view for explaining a state in which the first and second reinforcing bars RB1 and RB2 are held by the reinforcing bar retainer 1 of the present embodiment. As shown in FIG. 1, the reinforcing bar retainer 1 of the present embodiment is a device that holds the first reinforcing bar RB1 and the second reinforcing bar RB2 that intersect each other in a press-contact state at the intersection.

[0011] This reinforcing bar retainer 1 is composed of a metal plate, and is formed by bending a portion near one end of the metal plate to provide a holding piece 11 having a holding portion 11c capable of holding the first reinforcing bar RB1, and from the tip edge (one end edge) 11a of the holding piece 11 toward the base edge (the other end edge) 11b, it has a width into which the second reinforcing bar RB2 can be fitted and is cut out with a length shorter than the total length of the holding piece 11. It is characterized in that the first reinforcing bar RB1 held by the holding portion 11c is pressed against the second reinforcing bar RB2 fitted and held in the fitting recess 12.

[0012] According to the reinforcing bar retainer 1 of the present embodiment, after the second reinforcing bar RB2 is fitted into the fitting recess 12, the first reinforcing bar RB1 is held against the curved holding portion 11c, so that the first reinforcing bar RB1 is pressed against the second reinforcing bar RB2. Therefore, even if an external force is applied to each of the reinforcing bars RB1 and RB2, the press-contact state of each of the reinforcing bars RB1 and RB2 is maintained by the elastic force of the holding portion 11c. Therefore, compared with the prior art having an opening at the lower end, the holding force of each of the reinforcing bars RB1 and RB2 can be increased.

[0013] <Regarding the usage target of the reinforcing bar retainer 1> Prior to the detailed description of the reinforcing bar retainer 1, the object of use of the reinforcing bar retainer 1, specifically, the building 100 of a reinforced concrete structure, will be described. FIG. 2 is a cross-sectional view for explaining the columns 100, beams 120, slabs 130, and walls 140 in the building 100 of a reinforced concrete structure. As described above, the reinforcing bar retainer 1 is a device for holding two reinforcing bars RB1 and RB2 in a crossed state. In the building 100 of a reinforced concrete structure shown in FIG. 2, reinforcing bars are used as the core materials 111, 121, 131, and 141 in order to reinforce the concrete that is weak in tension. For example, in the columns 110 and beams 120, a plurality of main reinforcing bars 112 and 122 are arranged along the longitudinal directions of the columns 110 and beams 120, and shear reinforcing bars (the stirrups 113 in the columns 110 and the web bars 123 in the beams 120) are arranged in a direction intersecting the main reinforcing bars 112 and 122. Further, in the slabs 130 and walls 140, a lattice-like arrangement of a plurality of reinforcing bars 132, 133, 142, and 143 is used as the core materials 131 and 141.

[0014] In the present embodiment, the main reinforcing bars 112, 122, and the reinforcing bars 132, 142 correspond to the first reinforcing bar RB1, and the stirrups 113, the web bars 123, and the reinforcing bars 133, 143 correspond to the second reinforcing bar RB2. When constructing the building 100 of a reinforced concrete structure, after installing a formwork around the core materials 111, 121, 131, and 141, the concrete before hardening is placed in the formwork, and the formwork is removed after the concrete has hardened. By attaching the reinforcing bar retainer 1 to the location where the reinforcing bars intersect before placing the concrete, the inconvenience that the positions of the respective reinforcing bars RB1 and RB2 shift during the placement of the concrete is suppressed.

[0015] <Regarding the structure of the reinforcing bar retainer 1 of the first embodiment> Next, the structure of the reinforcing bar retainer 1 of the first embodiment will be described. 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. In the following description, the dimensions of each part are examples and are not limited to those dimensions.

[0016] The reinforcing bar retainer 1 shown in FIG. 3 is made of a single elastic square metal plate. For example, in this embodiment, it is made of a stainless steel plate having elasticity with a width W in the left-right direction of about 50 mm, a length of about 70 mm, and a thickness of about 0.7 mm. The reinforcing bar retainer 1 includes a holding piece 11 having a holding portion 11c capable of holding the first reinforcing bar RB1. The holding portion 11c is formed by curving a portion of the holding piece 11 near one end edge 11a with a curvature that matches the outer circumference of the first reinforcing bar RB1. In this embodiment, the length L1 of the holding portion 11c is about 15 mm. In this embodiment, the holding piece 11 includes a curved holding portion 11c, a flat tip portion 11d located on the tip side of the holding portion 11c, and a flat base portion 11e located on the base side of the holding portion 11c. The length L2 of the tip portion 11d is about 7 mm, and the length L3 of the base portion 11e is about 18 mm.

[0017] A fitting recess 12 into which the second reinforcing bar RB2 is fitted is formed in the holding piece 11. The fitting recess 12 is formed by notching from the tip edge (one end edge) 11a to the base edge (the other end edge) 11b of the holding piece 11 with a width that allows the second reinforcing bar RB2 to be fitted and a length shorter than the total length of the holding piece 11. The width of the fitting recess 12 is determined to be the same as or slightly larger than the diameter of the second reinforcing bar RB2, and is about 10 mm in this embodiment. The inner back portion of the fitting recess 12 has a semi-circular shape that matches the outer circumference of the first reinforcing bar RB1, and the distance L4 from the inner back end of the fitting recess 12 to the other end edge of the holding piece 11 is about 8 mm. The first bent piece 13 is formed continuously from the tip edge 11a of the holding piece 11. The first bent piece 13 is formed by bending the metal plate outward on both the left and right sides of the fitting recess 12, opposite to the holding portion 11c. In the present embodiment, the first bent piece 13 is bent at an angle of approximately 90 degrees with respect to the tip portion 11d of the holding piece 11, and the height H1 is approximately 4 mm. By providing the first bent piece 13, the strength at the tip edge 11a of the holding piece 11 can be improved.

[0018] The reinforcing bar holder 1 includes a folded piece 21 that is folded back at the base edge 11b of the holding piece 11. The folded piece 21 has a flat plate shape, and its length L5 is approximately 22 mm. Also, the angle θ between the folded piece 21 and the base end portion 11e of the holding piece 11 is approximately 50 degrees. In the folded piece 21, a second bent piece 22 is provided continuously from the base edge 21b on the side opposite to the tip edge 21a on the holding piece 11 side. The second bent piece 22 is formed by bending the metal plate toward the holding piece 11 side (inside). At the position in the center of the left and right of the second bent piece 22, in other words, at the position facing the second reinforcing bar RB2 that is fitted and held in the fitting recess 12, a curved recess 23 that matches the outer peripheral surface of the second reinforcing bar RB2 is notched and formed. As will be described later, in the recess 23, a part of the second reinforcing bar RB2 is fitted and held in the state where the reinforcing bar holder 1 holds each of the reinforcing bars RB1 and RB2. Thereby, the reinforcing bar holder 1 holds the second reinforcing bar RB2 at two locations, the fitting recess 12 and the recess 23, and the swaying of the second reinforcing bar RB2 in the holding state can be suppressed.

[0019] In the present embodiment, the second bent piece 22 is bent at an angle of approximately 90 degrees with respect to the folded piece 21, and the height H2 is approximately 4 mm. Also, the recess 23 is formed in a curved shape that matches the outer surface of the second reinforcing bar RB2. In addition, in this embodiment, although the second bending piece 22 is provided with a recess 23 into which a part of the second reinforcing bar RB2 fitted and held in the fitting recess 12 is fitted, the present invention is not limited to this configuration. For example, without providing the second bending piece 22, the base end edge 21b of the folded-back piece 21 may be brought into contact with the second reinforcing bar RB2. In this configuration, since the base end edge 21b of the folded-back piece 21 is in contact with the second reinforcing bar RB2, the position of the second reinforcing bar RB2 can be regulated, and the swing of the second reinforcing bar RB2 in the held state can be suppressed.

[0020] <Attachment procedure of the reinforcing bar holder 1> Next, the attachment procedure of the reinforcing bar holder 1 of the first embodiment will be described. FIGS. 4(a) and 4(b) are views showing the state before attachment, FIGS. 5(a) and 5(b) are views showing the state in which the second reinforcing bar RB2 is fitted into the fitting recess 12, and FIGS. 6(a) and 6(b) are views showing the state in which the first reinforcing bar RB1 is held in the holding portion 11c.

[0021] As shown in FIGS. 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 leading edge 11a of the holding piece 11 is directed toward each of the reinforcing bars RB1 and RB2, and further, the orientation of the reinforcing bar holder 1 is adjusted so that the second reinforcing bar RB2 is fitted into the fitting recess 12, and the reinforcing bar holder 1 is brought closer to each of the reinforcing bars RB1 and RB2. As shown in FIGS. 5(a) and 5(b), the second reinforcing bar RB2 is fitted to the innermost part of the fitting recess 12, and then the leading edge 11a of the holding piece 11 is brought closer to the first reinforcing bar RB1. From the state of FIGS. 5(a) and 5(b), the holding portion 11c of the holding piece 11 is pressed from the outside toward the first reinforcing bar RB1. By the pressing, the holding portion 11c expands, and the leading edge 11a of the holding piece 11 relatively moves along the outer surface of the first reinforcing bar RB1. Thereafter, the first reinforcing bar RB1 is held in the holding portion 11c.

[0022] As shown in FIGS. 6(a) and 6(b), when the first reinforcing bar RB1 is held in the holding portion 11c, the first reinforcing bar RB1 is pressed against the second reinforcing bar RB2 fitted and held in the fitting recess 12 by the elasticity of the holding portion 11c and the tip portion 11d. Further, the distance S1 between the leading edge 11a of the holding piece 11 and the second reinforcing bar RB2 is narrower than the diameter of the first reinforcing bar RB1, and the strength of the leading edge 11a is increased by the first bending piece 13, so that the first reinforcing bar RB1 is less likely to fall out of the holding portion 11c. Furthermore, when the first reinforcing bar RB1 is held in the holding portion 11c, a part of the second reinforcing bar RB2 fits into the recess 23 formed in the second bending piece 22. Since the reinforcing bar holder 1 holds the second reinforcing bar RB2 at two locations, namely, the fitting recess 12 and the recess 23, it is possible to suppress the swinging of the second reinforcing bar RB2 (specifically, the swinging in the direction along the longitudinal direction of the first reinforcing bar RB1).

[0023] Through the above procedure, the holding of each of the reinforcing bars RB1 and RB2 by the reinforcing bar holder 1 is completed. In the holding state of each of the reinforcing bars RB1 and RB2 by the reinforcing bar holder 1, since the first reinforcing bar RB1 is pressed against the second reinforcing bar RB2 fitted and held in the fitting recess 12 by the elastic force of the holding piece 11, the state in which the first reinforcing bar RB1 is pressed against the second reinforcing bar RB2 is maintained even when an external force is applied to each of the reinforcing bars RB1 and RB2. Therefore, compared with the prior art having an opening at the lower end, the holding force of each of the reinforcing bars RB1 and RB2 can be increased. When releasing the holding state of each of the reinforcing bars RB1 and RB2 by the reinforcing bar holder 1, the reverse procedure of the above-described attachment procedure may be performed.

[0024] <Regarding the reinforcing bar holder 1A of the second embodiment> Next, the structure of the reinforcing bar holder 1A of the second embodiment will be described. FIG. 7(a) is a front view of the reinforcing bar holder 1A, FIG. 7(b) is a left side view of the reinforcing bar holder 1A, FIG. 7(c) is a plan view of the reinforcing bar holder 1A, FIGS. 8(a) and 8(b) are views showing the state before attachment, FIGS. 9(a) and 9(b) are views showing the state in which the second reinforcing bar RB2 is fitted into the fitting recess 12, and FIGS. 10(a) and 10(b) are views showing the state in which the first reinforcing bar RB1 is held in the holding portion 11c.

[0025] The reinforcing bar retainer 1A of the second embodiment shown in Fig. 7 is different from the reinforcing bar retainer 1 of the first embodiment described in Fig. 3 in that the folded piece 21 and the second bent piece 22 are eliminated, and the remaining part has the same configuration as the reinforcing bar retainer 1. Therefore, regarding the reinforcing bar retainer 1A of the second embodiment, the same parts as those of the reinforcing bar retainer 1 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

[0026] Next, the attachment procedure of the reinforcing bar retainer 1A of the second embodiment will be described. The reinforcing bar retainer 1A of the second embodiment can also be attached to each of the reinforcing bars RB1 and RB2 in the same procedure as the reinforcing bar retainer 1 of the first embodiment. As shown in Figs. 8(a) and 8(b), when attaching the reinforcing bar retainer 1A to each of the reinforcing bars RB1 and RB2, the leading edge 11a of the holding piece 11 is directed toward each of the reinforcing bars RB1 and RB2, and the orientation of the reinforcing bar retainer 1A is adjusted so that the second reinforcing bar RB2 is further fitted into the fitting recess 12, and the reinforcing bar retainer 1A is brought closer to each of the reinforcing bars RB1 and RB2. As shown in Figs. 9(a) and 9(b), the second reinforcing bar RB2 is fitted into the inner depth of the fitting recess 12, and then the leading edge 11a of the holding piece 11 is brought close to the first reinforcing bar RB1. From the state of Figs. 9(a) and 9(b), the holding portion 11c of the holding piece 11 is pressed from the outside toward the first reinforcing bar RB1. By the pressing, the holding portion 11c expands, and the leading edge 11a of the holding piece 11 relatively moves along the outer surface of the first reinforcing bar RB1. Thereafter, the first reinforcing bar RB1 is held in the holding portion 11c. As shown in Figs. 10(a) and 10(b), when the first reinforcing bar RB1 is held in the holding portion 11c, the first reinforcing bar RB1 is pressed against the second reinforcing bar RB2 fitted and held in the fitting recess 12 by the elasticity of the holding portion 11c and the tip portion 11d. Further, since the distance between the leading edge 11a of the holding piece 11 and the second reinforcing bar RB2 is narrower than the diameter of the first reinforcing bar RB1, and the strength of the leading edge is increased by the first bent piece 13, the first reinforcing bar RB1 is less likely to fall out of the holding portion 11c.

[0027] By the above procedure, the holding of each reinforcing bar RB1, RB2 by the reinforcing bar holder 1A is completed. In the holding state of each reinforcing bar RB1, RB2 by the reinforcing bar holder 1A, since the first reinforcing bar RB1 is pressed against the second reinforcing bar RB2 fitted and held in the fitting recess 12 by the elastic force of the holding piece 11, the holding force of each reinforcing bar RB1, RB2 can be increased.

[0028] <Regarding the modification> As the metal plate constituting the reinforcing bar holders 1, 1A, a stainless steel plate was exemplified in each of the above-described embodiments. However, a metal plate other than the stainless steel plate can be used as long as it is an elastic metal plate. Regarding the reinforcing bars held by the reinforcing bar holders 1, 1A, in each of the above-described embodiments, the reinforcing bars used as the core material of the reinforced concrete structure were exemplified. However, the present invention is not limited to this type of reinforcing bar. That is, any two reinforcing bars held in an intersecting state may be used.

[0029] 〔Summary of Embodiment Examples, Actions, and Effects of the Present Invention〕 〈First Embodiment〉 This embodiment relates to reinforcing bar holders 1, 1A for holding a first reinforcing bar RB1 and a second reinforcing bar RB2 in an intersecting state. The holders are composed of a metal plate, and a holding piece 11 is formed by bending a portion near one end of the metal plate. The holding piece 11 has a holding portion 11c capable of holding the first reinforcing bar RB1. A fitting recess 12 is formed from the leading edge 11a (one end edge) to the trailing edge 11b (the other end edge) of the holding piece 11. The fitting recess 12 has a length shorter than the overall length of the holding piece 11 and a width into which the second reinforcing bar RB2 can be fitted. The first reinforcing bar RB1 held by the holding portion 11c is pressed against the second reinforcing bar RB2 fitted and held in the fitting recess 12. According to the reinforcing bar holders 1, 1A according to this embodiment, in the holding state of each reinforcing bar RB1, RB2, since the first reinforcing bar RB1 is pressed against the second reinforcing bar RB2 fitted and held in the fitting recess 12 by the elastic force of the holding piece 11, the holding force of each reinforcing bar RB1, RB2 can be increased.

[0030] 〈Second Embodiment〉 The reinforcing bar retainer 1 according to this aspect is provided continuously with a holding piece 11, and includes a folded-back piece 21 that is folded back at the base edge 11b of the holding piece 11. The base edge 21b of the folded-back piece 21 on the side opposite to the holding piece 11 is characterized by being capable of abutting against a second reinforcing bar RB2 fitted and held in the fitting recess 12. According to the reinforcing bar holding portion 11c according to this aspect, in addition to the fitting recess 12, the position of the second reinforcing bar RB2 can be regulated by the base edge 21b of the folded-back piece 21, so that the swaying of the second reinforcing bar RB2 in the held state can be suppressed.

[0031] 〈Third Embodiment〉 The reinforcing bar retainer 1 according to this aspect is provided continuously with the folded-back piece 21, and includes a second bent piece 22 that is bent toward the holding piece 11 at the edge of the folded-back piece 21 on the side opposite to the holding piece 11. At a position of the second bent piece 22 facing the second reinforcing bar RB2, a recess 23 into which a part of the second reinforcing bar RB2 can be fitted is notched. According to the reinforcing bar holding portion 11c according to this aspect, in addition to the fitting recess 12, the position of the second reinforcing bar RB2 can be regulated by the recess 23 of the second bent piece 22, so that the swaying of the second reinforcing bar RB2 in the held state can be suppressed.

Explanation of Reference Numerals

[0032] 1... Reinforcing bar retainer, 11... Holding piece, 11a... Tip edge of the holding piece, 11b... Base edge of the holding piece, 11c... Holding portion, 11d... Tip portion, 11e... Base portion, 12... Fitting recess, 13... First bent piece, 21... Folded-back piece, 21a... Tip edge of the folded-back piece, 21b... Base edge of the folded-back piece, 22... Second bent piece, 23... Recess, 100... Building with a reinforced concrete structure, 110... Column, 120... Beam, 130... Slab, 140... Wall, First reinforcing bar RB1, Second reinforcing bar RB2

Claims

1. A reinforcing bar holder for holding the first reinforcing bar and the second reinforcing bar in an intersecting state, comprising a holding piece formed of a metal plate and having a holding portion formed by bending a portion near one end of the metal plate to hold the first reinforcing bar, a fitting recess formed by a notch from one end edge to the other end edge of the holding piece, having a length shorter than the total length of the holding piece, and a width into which the second reinforcing bar can be fitted, a folded piece provided continuously with the holding piece and folded back at the other end edge of the holding piece, and comprising: the first reinforcing bar held by the holding portion is pressed against the second reinforcing bar fitted and held in the fitting recess, a reinforcing bar holder, characterized in that an edge of the folded piece on the side opposite to the holding piece can contact the second reinforcing bar fitted and held in the fitting recess.

2. comprising a bent piece provided continuously with the folded piece and bent toward the holding piece at an edge of the folded piece on the side opposite to the holding piece, the reinforcing bar holder according to claim 1, characterized in that a recess into which a part of the second reinforcing bar can be fitted is notched at a position of the bent piece facing the second reinforcing bar.

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