Auxiliary parts

Abstract

To provide a spacer which has an excellent compatibility with concrete, can be easily fitted and is not removed by vibration by a vibrator during concrete pouring.SOLUTION: A reinforcement member 1 assists an instalment work of a plurality of vertical reinforcements Z1 and horizontal reinforcements, and comprises a fastening member 3 in a substantially channel-shape or a substantially U-shape and fixed to the vertical reinforcement Z1 and a bolt member 4 for clamping the vertical reinforcement Z1 inside the fastening member 3. A female screw part with which the bolt member 4 is screwed is formed at the fastening member 3, the bolt member 4 clamps the vertical reinforcement Z1 between a tip of the bolt member 4 and an inside surface of the fastening member 3 to fix the fastening member 3 to the vertical reinforcement Z1 by screwing with the female screw part, and in a state where the vertical reinforcement Z1 is fixed between the tip of the bolt member 4 and the inside surface of the fastening member 3, a base end of the bolt member 4 protrudes from the fastening member 3 and the horizontal reinforcement can be placed on a shank of the bolt member 4 protruding from the fastening member 3.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an auxiliary member, particularly to an auxiliary member for assisting in the installation of a plurality of vertically oriented vertical reinforcing bars and horizontally oriented horizontal reinforcing bars when constructing a reinforced concrete structure. [Background technology]

[0002] In reinforced concrete structures, in order to reinforce the tensile strength of the concrete, a structure (reinforcement structure) made of multiple vertically oriented vertical rebars and horizontally oriented horizontal rebars arranged in a grid pattern, which is placed inside the concrete. When forming such a reinforcement structure, first, the vertical rebars are erected and fixed to the foundation at a predetermined interval, and then multiple workers cross the vertical rebars at a predetermined height while holding the horizontal rebars horizontally, and the crossing part is wrapped with a binding member such as wire, and then both ends are intertwined and twisted to secure the structure. DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0003] As described above, when forming a reinforcement structure in which vertical and horizontal reinforcement are arranged in a lattice pattern, there is a problem that workability is poor, as multiple workers need to work together, especially when installing the horizontal reinforcement.

[0004] Therefore, the present invention aims to provide an auxiliary member that can efficiently carry out the installation work of multiple vertical reinforcements and horizontal reinforcements made of steel bars when constructing a reinforced concrete structure. [Means for solving the problem]

[0005] The above-mentioned object of the present invention can be achieved by an auxiliary member that assists in the installation work of a plurality of vertically oriented vertical reinforcement bars and horizontally oriented horizontal reinforcement bars made of rebar when constructing a reinforced concrete structure, the auxiliary member comprising: a fastening member that is approximately U-shaped or C-shaped and is fixed to the vertical reinforcement bars; and a bolt member for clamping the vertical reinforcement bars inside the fastening member, the fastening member having a female threaded portion into which the bolt member is threaded, the bolt member clamping the vertical reinforcement bars between the tip end of the bolt member and the inner surface of the fastening member by threading into the female threaded portion, thereby fixing the fastening member to the vertical reinforcement bars, and the base end of the bolt member is configured to protrude from the fastening member when the vertical reinforcement bars are fixed between the tip end of the bolt member and the inner surface of the fastening member, and the horizontal reinforcement bars can be placed on the shank of the bolt member protruding from the fastening member.

[0006] In the auxiliary member, it is preferable that a stopper portion be formed at the base end of the bolt member to prevent the horizontal bar placed on the shank of the bolt member from falling off.

[0007] Furthermore, it is preferable that the fastening member is formed by bending or curving a metal plate, and comprises a base and opposing pieces at both ends of the base that face each other across a gap slightly larger than the diameter of the vertical reinforcement, and that the female thread portion is formed on one of the opposing pieces at a distance smaller than the diameter of the vertical reinforcement from an inner position on the base where the vertical reinforcement can abut, and that the vertical reinforcement is clamped between the inner surface of the fastening member and the tip of the bolt member by screwing into the female thread portion of the bolt member.

[0008] It is also preferable that the other opposing piece of the fastening member is shorter than the one opposing piece and is set to a length that allows it to contact the vertical strip when screwed into the female thread portion of the bolt member.

[0009] The present invention further includes a concrete block for maintaining a predetermined distance between the structure formed by the vertical reinforcement and the horizontal reinforcement and a formwork disposed outside the structure to ensure a concrete cover, and it is preferable that the block is installed at the base end of the bolt member.

[0010] Preferably, the base end of the bolt member is embedded in the end face of the block body.

[0011] The above-mentioned object of the present invention is to provide an auxiliary member that assists in the installation of a plurality of vertically oriented vertical reinforcements and horizontally oriented horizontal reinforcements made of reinforcing bars when constructing a reinforced concrete structure, the auxiliary member comprising a substantially U-shaped or substantially C-shaped fastening member for fixing the block body to the vertical reinforcements, and a bolt member for clamping the vertical reinforcements inside the fastening member, the fastening member having a mounting member erected at its center base, and one and the other opposing pieces at both ends of the base being bent in the opposite direction to the erection direction of the mounting member. The above-mentioned object is achieved by an auxiliary member characterized in that the fastening member is formed into a substantially U-shape or a substantially C-shape, and a female thread portion for threading the bolt member is formed on one of the opposing pieces of the fastening member, and when the bolt member is threaded into the female thread portion, the vertical reinforcement is clamped between the inner surface of the fastening member and the tip end of the bolt member, thereby fixing the fastening member to the vertical reinforcement, and the above-mentioned auxiliary member is configured so that the horizontal reinforcement can be placed on it with the vertical reinforcement fixed between the tip end of the bolt member and the inner surface of the fastening member.

[0012] Furthermore, it is preferable that the one opposing piece and the other opposing piece of the fastening member face each other at a distance greater than the diameter of the reinforcing bar, and that the female threaded portion is formed on one of the opposing pieces at a distance greater than the diameter of the reinforcing bar from an inner position of the base where the reinforcing bar can abut, and that the reinforcing bar is clamped between the inner surface of the fastening member and the tip of the bolt member by screwing the bolt member into the female threaded portion.

[0013] It is also preferable that a stopper portion be formed at the leading end of the mounting member in the upright direction to prevent the horizontal bars placed on the mounting member from falling.

[0014] In addition, the structure further includes a concrete block for maintaining a predetermined distance between the structure formed by the vertical reinforcement and the horizontal reinforcement and a formwork arranged outside the structure to ensure a concrete cover, and it is preferable that the block is installed at the tip of the mounting member in the vertical direction. [Effects of the Invention]

[0015] According to the present invention, an auxiliary member can be provided that allows efficient installation of multiple vertical reinforcements and horizontal reinforcements made of steel bars when constructing a reinforced concrete structure. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is a perspective view of an auxiliary member according to the first embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of an auxiliary member according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view of the auxiliary member in the first embodiment in use, as viewed from the side. [Figure 4] FIG. 3 is a cross-sectional view of the auxiliary member in the first embodiment in use, as viewed from above. [Figure 5] FIG. 4 is an explanatory diagram for explaining the function of the auxiliary member in the first embodiment. [Figure 6] FIG. 4 is an explanatory diagram for explaining the function of the auxiliary member in the first embodiment. [Figure 7] FIG. 10 is a perspective view of an auxiliary member according to a second embodiment of the present invention. [Figure 8] FIG. 10 is a cross-sectional view of an auxiliary member according to a second embodiment in a use state, as viewed from above. [Figure 9] FIG. 10 is a perspective view of an auxiliary member according to a third embodiment of the present invention. [Figure 10]FIG. 10 is a cross-sectional view of an auxiliary member according to a second embodiment in a use state, as viewed from above. [Figure 11] 10 is an explanatory view for explaining the function of the auxiliary member according to the third embodiment. FIG. [Figure 12] FIG. 10 is a perspective view of an auxiliary member according to a fourth embodiment of the present invention. [Figure 13] FIG. 10 is an exploded perspective view of an auxiliary member according to a fourth embodiment of the present invention. [Figure 14] FIG. 10 is a cross-sectional view of an auxiliary member according to a fourth embodiment in a use state, as viewed from above. [Figure 15] FIG. 10 is an explanatory view showing a modified example of the auxiliary member according to the fourth embodiment. [Figure 16] FIG. 13 is an exploded perspective view of an auxiliary member according to a fifth embodiment of the present invention. [Figure 17] 13 is an explanatory view for explaining the function of the auxiliary member according to the fifth embodiment. FIG. [Figure 18] FIG. 11 is an explanatory view showing a modified example of the auxiliary member according to the fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] (First embodiment) An auxiliary member 1 according to a first embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is a perspective view of the auxiliary member 1 according to this embodiment, and FIG. 2 is an exploded perspective view. FIG. 3 is a side view of the auxiliary member 1 in use as seen from the side, and FIG. 4 is a cross-sectional view of the auxiliary member 1 in use as seen from above. Furthermore, FIGS. 5 and 6 are explanatory views for explaining the function of the auxiliary member 1 according to this embodiment. FIG. 5 is a side view of the auxiliary member 1 in use as seen from the side, and FIG. 6 is a cross-sectional view of the auxiliary member 1 in use as seen from above.

[0018] The auxiliary member 1 according to this embodiment is an auxiliary member 1 that assists in the installation of multiple vertical reinforcing bars and horizontal reinforcing bars when constructing a reinforced concrete structure, and is also configured to function as a spacer for reinforced concrete. This auxiliary member 1 is composed of a concrete block body 2, a U-shaped metal fastening member 3, and a bolt member 4.

[0019] The block body 2 is a concrete block body that maintains a predetermined distance between a structure (reinforced concrete structure) formed by vertical and horizontal reinforcement and a formwork placed outside the structure, thereby ensuring a concrete cover, and is formed with an outer shape that is approximately rectangular overall with curved tips.

[0020] The fastening member 3 is formed by bending a metal plate into a U-shape, and is composed of a base 3a and opposing pieces 3b, 3c at both ends of the base 3a that face each other across a gap equal to the diameter of the vertical reinforcing bar plus 2 to 3 mm of play, with one of the opposing pieces 3b having an internal thread 5 into which the bolt member 4 is threaded. The internal thread 5 is formed so that its edge is located at a distance smaller than the diameter of the vertical reinforcing bar from the inside position of the base 3a where the vertical reinforcing bar can abut; more strictly speaking, the position at which the internal thread 5 is formed is set so that the bolt member 4 threaded into the internal thread 5 can abut against the vertical reinforcing bar, taking into account the diameter of the bolt member 4, even if the center of the bolt member 4 is located at a distance from the reference position greater than the diameter of the vertical reinforcing bar Z1.

[0021] As shown in FIGS. 3 and 4 , the bolt member 4 is threadedly engaged with the female thread portion 5 to sandwich the vertical reinforcement Z1 between the tip of the bolt member 4 and the inner surface of the fastening member 3, thereby fixing the fastening member 3 to the vertical reinforcement Z1. With the vertical reinforcement Z1 fixed between the tip of the bolt member 4 and the inner surface of the fastening member 3, the base end 4a of the bolt member 4 protrudes from the fastening member 3. The bolt member 4 is also configured so that horizontal reinforcement Z2 can be placed on the shank of the bolt member 4 protruding outward from the fastening member 3. The block body 2 is connected to the tip of the base end 4a of the bolt member 4. More specifically, the tip of the base end 4a of the bolt member 4 is embedded in the center of the flat end surface 2a (end surface in the present invention) of the block body 2, which is opposite the curved surface. This structure can be obtained, for example, by pouring concrete into a block body formwork and then inserting and embedding the tip area of ​​the base end 4a of the bolt member 4 into the concrete.

[0022] 5, the dimension from the flat end surface 2a of the block body 2 to the tip of the bolt member 4 is desirably set to be slightly larger than the sum of the length equivalent to the diameter of the horizontal reinforcement Z2, the thickness of the opposing piece 3b of the clamping member 3, and the length equivalent to half the diameter of the vertical reinforcement Z1. In this way, when the bolt member 4 is threaded into the female thread portion 5, it protrudes into the inside of the clamping member 3 by an amount equivalent to approximately half the diameter of the vertical reinforcement Z1, and the tip of the bolt member 4 abuts against the vertical reinforcement Z1, clamping and fixing the vertical reinforcement Z1 between the inner surface of the clamping member 3 and the bolt member 4, while allowing the horizontal reinforcement Z2 to rest on the shank of the bolt member 4 located between the clamping member 3 and the flat end surface 2a of the block body 2.

[0023] Next, the procedure for actually using the auxiliary member 1 according to this embodiment will be described. First, as shown in Figures 3 and 4, the fastening member 3 is applied to a predetermined position of the vertical reinforcement Z1 so that the vertical reinforcement Z1 fits inside the fastening member 3. At this time, it is necessary to apply the fastening member 3 so that the opposing piece 3b on which the female thread portion 5 is formed is positioned on the side of the vertical reinforcement Z1 where the covering margin should be maintained.

[0024] Next, the bolt members 4 connected to the block body 2 are threaded into the female thread portions 5 of the fastening member 3, so that the tips of the bolt members 4 come into contact with the vertical reinforcement Z1, the vertical reinforcement Z1 is clamped between the inner surface of the fastening member 3 and the bolt members 4, and the auxiliary members 1 are fixed to the vertical reinforcement Z1. After multiple attachments of the auxiliary members 1 to the vertical reinforcement Z1, horizontal reinforcement Z2 is placed on the shanks of the bolt members 4 that are present between the fastening member 3 and the flat end surface 2a of the block body 2, as shown in Figures 5 and 6.

[0025] The intersections of the vertical reinforcement Z1 and the horizontal reinforcement Z2 are then wrapped around the auxiliary member 1 with a bundling member such as wire, and the ends are entangled and twisted to secure them in place. When forming a reinforced concrete structure, a concrete formwork (not shown) is placed on the side of the block body 2 opposite the embedded surface of the bolt members 4, and concrete is poured into the formwork to form the reinforced concrete structure. At this time, the concrete is poured while being vibrated by a vibrator, but because the vertical reinforcement Z1 is sandwiched between the inner surfaces of the tightening members 3 and the bolt members 4, and because the vertical reinforcement Z1 and the horizontal reinforcement Z2 are bound together with a bundling member such as wire, the vibrations do not cause the auxiliary member 1, which functions as a spacer, to shift position or become detached.

[0026] As mentioned above, the distance between the opposing pieces 3b, 3c of the fastening member 3 is set slightly larger than the diameter of the vertical reinforcing bars Z1. However, since the diameter of the vertical reinforcing bars Z1 is not necessarily uniform and varies, if the distance is set to the same as the diameter of the vertical reinforcing bars Z1, the vertical reinforcing bars Z1 may not fit inside the fastening member 3 when the fastening member 3 is applied to the vertical reinforcing bars Z1. Therefore, by providing a slight gap in the distance between the opposing pieces 3b, 3c, this situation can be easily dealt with. In this case, the gap is set to a value within the allowable range of the concrete cover.

[0027] As described above, the auxiliary member 1 according to the first embodiment is provided with a portion (shank of the bolt member 4) on which the horizontal reinforcement Z2 can be placed, so that a single worker can install and fix the horizontal reinforcement Z2 to the vertical reinforcement Z1, rather than requiring multiple workers to place the horizontal reinforcement Z2 as in the past, thereby improving workability. Furthermore, the auxiliary member 1 according to the first embodiment can also function as a spacer for reinforced concrete that ensures the concrete cover, further improving workability when forming a reinforced concrete structure.

[0028] (Second embodiment) A second embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a perspective view of an auxiliary member 1 according to the second embodiment, and FIG. 8 is a cross-sectional view of the auxiliary member 1 in use, viewed from above. This embodiment differs from the first embodiment in that, as shown in FIGS. 7 and 8, the other facing piece 3c of the fastening member 3 is shorter than the facing piece 3b on which the female thread portion 5 for engagement of the bolt member 4 of the fastening member 3 is formed, and is set to a length that allows contact with the vertical reinforcing bars Z1 when the bolt member 4 is screwed. The remaining configuration is essentially the same as that of the first embodiment. This widens the opening of the fastening member 3, making it easier to fit the vertical reinforcing bars Z1 inside the fastening member 3, making it even easier to attach the auxiliary member 1 to the vertical reinforcing bars Z1.

[0029] (Third embodiment) A third embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG. 9 is a perspective view of an auxiliary member 1 according to the third embodiment, and FIG. 10 is a cross-sectional view of the auxiliary member 1 in use, viewed from above. In this embodiment, a fastening member 3 includes a mounting member (shaft member) 6 erected on a central base 3a. One and the other opposing pieces 3b, 3c at both ends of the base 3a are bent in the direction opposite to the erection direction of the mounting member (shaft member) 6 to form a substantially U-shape. A block body 2 is installed at the leading end of the mounting member (shaft member) 6 erected from the base 3a. One opposing piece 3b is formed with a female thread 8 for threading therethrough a bolt member 7 for fixing the vertical reinforcement Z1. Other than this configuration, the present embodiment is essentially the same as the first embodiment.

[0030] For example, one end of the mounting member (shaft member) 6 is connected and fixed to the base 3a of the fastening member 3 by welding, brazing, or the like, and the other end is embedded and fixed in the flat end surface 2a of the block body 2. The length of the mounting member (shaft member) 6 interposed between the base 3a of the fastening member 3 and the flat end surface 2a of the block body 2 is preferably set to be approximately 2 to 3 mm longer than the length corresponding to the diameter of the horizontal reinforcement Z2. Furthermore, the position of the female thread portion 8 is preferably formed at a position that is a distance greater than the diameter of the vertical reinforcement Z1, based on the inner position of the base 3a where the vertical reinforcement Z1 can abut, and at a position where the vertical reinforcement Z1 can be clamped between the inner surface of the fastening member 3 and the tip of the bolt member 7 when the bolt member 7 is screwed into the female thread portion 8.

[0031] Next, a procedure for actually using the auxiliary member 1 according to the third embodiment will be described. First, as shown in FIG. 10, the fastening member 3 is placed inside the fastening member 3, that is, at a predetermined position on the vertical reinforcement Z1 so that the vertical reinforcement Z1 fits between the opposing pieces 3b, 3c of the fastening member 3, and the bolt member 7 is screwed into the female thread portion 8 of the fastening member 3. As the bolt member 7 is screwed into the female thread portion 8, the tip of the bolt member 7 abuts against the vertical reinforcement Z1, and the vertical reinforcement Z1 is sandwiched between the inner surface of the fastening member 3 and the tip of the bolt member 7, thereby fixing the auxiliary member 1 to the vertical reinforcement Z1. After multiple attachments of the auxiliary member 1 to the vertical reinforcement Z1, the horizontal reinforcement Z2 is placed on the mounting member (shaft member) 6 located between the fastening member 3 and the flat end surface 2a of the block body 2, as shown in FIG. 11. Thereafter, the intersections of the vertical reinforcing bars Z1 and the horizontal reinforcing bars Z2 are wrapped around the auxiliary member 1 with a binding material such as a wire, and the ends are intertwined and twisted to secure the auxiliary member 1. Note that Fig. 11 is an explanatory diagram for explaining the function of the auxiliary member 1 according to this embodiment, and is a cross-sectional view of the auxiliary member 1 in use as seen from above.

[0032] The third embodiment having such a configuration can also achieve the same effects as the first embodiment described above.

[0033] (Fourth embodiment) A fourth embodiment of the present invention will be described with reference to FIGS. 12 to 14. FIG. 12 is a perspective view of an auxiliary member 1 according to this fourth embodiment, and FIG. 13 is an exploded perspective view. Also, FIG. 14 is a cross-sectional view of the auxiliary member 1 in use, viewed from above. This embodiment has the same configuration as the first embodiment, except that the block body 2 included in the auxiliary member 1 according to the first embodiment is not provided. Even with an auxiliary member 1 having such a configuration, by threading a bolt member 4 into the female thread portion 5, the vertical reinforcement Z1 can be sandwiched between the tip of the bolt member 4 and the inner surface of the fastening member 3, thereby fixing the fastening member 3 to the vertical reinforcement Z1. Furthermore, with the vertical reinforcement Z1 fixed between the tip of the bolt member 4 and the inner surface of the fastening member 3, the base end 4a of the bolt member 4 is configured to protrude a predetermined amount from the fastening member 3, so that the horizontal reinforcement Z2 can be placed on the shank of the bolt member 4 protruding from the fastening member 3. As a result, multiple workers are not required for the horizontal reinforcement Z2 placement work as in the conventional case, and a single worker can install and fix the horizontal reinforcement Z2 to the vertical reinforcement Z1, improving workability when forming reinforced concrete structures.

[0034] 15, a stopper portion 9 may be formed at the base end 4a of the bolt member 4 to prevent the horizontal reinforcement Z2 placed on the shank of the bolt member 4 from falling. There are no particular limitations on the specific example of the stopper portion 9, but for example, a headed bolt may be used as the bolt member 4, and the head of the bolt may be used as the stopper portion 9.

[0035] (Fifth embodiment) A fifth embodiment of the present invention will be described with reference to FIGS. 16 and 17. FIG. 16 is an exploded perspective view of an auxiliary member 1 according to the fifth embodiment, and FIG. 17 is an explanatory diagram for explaining the operation of the auxiliary member 1 according to this embodiment, showing a cross-sectional view of the auxiliary member 1 in use as seen from above. This embodiment has the same configuration as the third embodiment, except that the block body 2 included in the auxiliary member 1 according to the third embodiment is not provided. Even with an auxiliary member 1 having such a configuration, by threading a bolt member 7 into the female thread portion 8, the vertical reinforcement Z1 can be sandwiched between the tip of the bolt member 7 and the inner surface of the fastening member 3, thereby fixing the fastening member 3 to the vertical reinforcement Z1. Furthermore, with the vertical reinforcement Z1 fixed between the tip of the bolt member 7 and the inner surface of the fastening member 3, the mounting member (shaft member) 6 is configured to protrude from the central base 3a of the fastening member 3, so that the horizontal reinforcement Z2 can be placed on the mounting member (shaft member) 6. As a result, multiple workers are not required for the horizontal reinforcement Z2 placement work as in the conventional method, and a single worker can install and fix the horizontal reinforcement Z2 to the vertical reinforcement Z1, improving workability when forming reinforced concrete structures.

[0036] 18, a stopper portion 10 may be formed at the tip of the mounting member (shaft member) 6 in the upright direction to prevent the horizontal reinforcement Z2 placed on the shaft portion of the mounting member (shaft member) 6 from falling. There are no particular limitations on the specific example of the stopper portion 10, but for example, a headed bolt can be used as the mounting member (shaft member) 6, and the head of the bolt can be used as the stopper portion.

[0037] Furthermore, the present invention is not limited to the above-described embodiments, and various modifications other than those described above can be made without departing from the spirit of the present invention.

[0038] For example, the shape of the block body 2 is not limited to the above, but may be a rectangular parallelepiped, a cube, a hemisphere, or the like.

[0039] Furthermore, the dimensions of the opposing pieces 3b, 3c of the fastening member 3 may be different from the above-described same. Furthermore, the outer shape of the fastening member 3 is not limited to the above-described U-shape, but may also be U-shaped.

[0040] Furthermore, even when the configurations of the above third and fifth embodiments are adopted, it goes without saying that, as in the second embodiment, the other opposing piece 3c of the fastening member 3 can be configured to be shorter than the opposing piece 3b on which the female thread portion 8 for screwing of the bolt member 7 of the fastening member 3 is formed, and to be of a length that allows contact with the vertical bar Z1 when the bolt member 7 is screwed.

[0041] Furthermore, in the third and fifth embodiments described above, the mounting member 6 is configured to have a rod-shaped mounting member 6, but the shape of this mounting member 6 is not particularly limited as long as the horizontal reinforcement Z2 can be placed on top of it, and it can be configured in various shapes such as a plate shape, a block shape, etc. in addition to a rod shape. [Explanation of symbols]

[0042] 1 Auxiliary parts 2 Block letters 2a Flat end face of block 3 Fastening member 3a base 3b,3c Opposing piece 4 Bolt members 5 Female thread 6 Mounting member (shaft member) 7 Bolt material 8 Female thread 9 Stopper member 10 Stopper member Z1 Vertical Stripes Z2 horizontal bars

Claims

1. An auxiliary member that assists in the installation of multiple vertical reinforcements and horizontal reinforcements made of reinforcing bars when constructing a reinforced concrete structure, a fastening member having a substantially U-shape or a substantially C-shape and fixed to the vertical reinforcement; a bolt member for clamping the vertical reinforcement inside the fastening member, The fastening member has a female thread portion formed therein into which the bolt member is threaded, The bolt member is configured such that, by screwing into the female threaded portion, the vertical reinforcement is clamped between the tip end of the bolt member and the inner surface of the fastening member, thereby fixing the fastening member to the vertical reinforcement, and the base end of the bolt member is configured to protrude from the fastening member when the vertical reinforcement is fixed between the tip end of the bolt member and the inner surface of the fastening member, and the horizontal reinforcement can be placed on the shank of the bolt member protruding from the fastening member.

2. 2. The auxiliary member according to claim 1, wherein a stopper portion is formed at the base end of the bolt member to prevent the horizontal bar placed on the shank of the bolt member from falling off.

3. The fastening member is formed by bending or curving a metal plate, and comprises a base and opposing pieces at both ends of the base that face each other at a distance slightly larger than the diameter of the vertical reinforcement, and the female thread portion is formed on one of the opposing pieces at a position that is a distance smaller than the diameter of the vertical reinforcement from an inner position of the base where the vertical reinforcement can abut, 3. The auxiliary member according to claim 1, wherein the vertical bar is clamped between an inner surface of the fastening member and a tip of the bolt member by threading the female thread portion of the bolt member.

4. The auxiliary member according to claim 3, characterized in that the other opposing piece of the fastening member is shorter than the one opposing piece and is set to a length that allows it to contact the vertical strip when screwed into the female thread portion of the bolt member.

5. The method further includes providing a concrete block body for maintaining a predetermined distance between a structure formed by the vertical reinforcement and the horizontal reinforcement and a formwork disposed outside the structure to ensure a concrete cover, 5. The auxiliary member according to claim 1, wherein the block body is disposed at a base end of the bolt member.

6. 6. A spacer for reinforced concrete according to claim 5, wherein the base end of the bolt member is embedded in the end face of the block body.

7. An auxiliary member that assists in the installation of multiple vertical reinforcements and horizontal reinforcements made of reinforcing bars when constructing a reinforced concrete structure, a fastening member having a substantially U-shape or a substantially C-shape and fixed to the vertical reinforcement; a bolt member for clamping the vertical reinforcement inside the fastening member, The fastening member has a mounting member erected at its central base, and one and the other opposing pieces at both ends of the base are bent in a direction opposite to the erecting direction of the mounting member to form a substantially U-shape or a substantially C-shape, a female thread portion for threading the bolt member is formed on the one opposing piece of the fastening member; When the bolt member is screwed into the female threaded portion, the vertical reinforcement is clamped between the inner surface of the fastening member and the tip of the bolt member, thereby fixing the fastening member to the vertical reinforcement, and the placement member is configured so that the horizontal reinforcement can be placed on it when the vertical reinforcement is fixed between the tip of the bolt member and the inner surface of the fastening member.

8. The one opposing piece and the other opposing piece of the fastening member face each other at a distance greater than the diameter of the reinforcing bar, The female thread portion is formed on one of the opposing pieces at a distance greater than the diameter of the reinforcing bar from an inner position of the base where the reinforcing bar can abut, 8. The auxiliary member according to claim 7, wherein the reinforcing bar is clamped between the inner surface of the fastening member and the tip of the bolt member by threading the bolt member into the female thread portion.

9. 9. The auxiliary member according to claim 7, wherein a stopper portion is formed at a leading end of the mounting member in the upright direction to prevent the horizontal bars placed on the mounting member from falling.

10. The method further includes providing a concrete block body for maintaining a predetermined distance between a structure formed by the vertical reinforcement and the horizontal reinforcement and a formwork disposed outside the structure to ensure a concrete cover, 9. The auxiliary member according to claim 7, wherein the block body is provided at a leading end of the mounting member in the upright direction.

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