JPH0626150A - Reinforcement interval retaining tool - Google Patents

Abstract

PURPOSE:To make it possible to simplify on-site construction work for reinforcements by installing an opening section which elastically clamps reinforcements to a hollow holding section which is mounted to one end of a spacer body which sets a covering thickness of the reinforcements. CONSTITUTION:This clearance holder comprises a spacer body 1, which sets a covering thickness of reinforcements A, a clamp body 2, which is formed separated from the spacer body 1 and designed to clamp the reinforcements A elastically. Then, the spacer body 1 is formed substantially in the shape of a column and a blind hole 11, which opens to one end of the spacer body 1 in its longitudinal direction, is formed in an axial center of the spacer body 1 while the longitudinal other side of the spacer body 1 is formed in the shape of a spherical surface 12. Then, the clamp body 2 is made of a metallic spring material and formed in the shape of 'C' in its cross section where there are installed a hollow holding section 21 which allows the reinforcements A to be placed in and an opening section 22 which allows the reinforcements A to be placed into the hollow holding section 21. At the same time, the central part of the bottom of the hollow holding section 21 in the clamp body 2 is partially cut and raised, thereby forming a pair of support pieces 23 in once piece. The support pieces are further fixed with a filling material in the blind hole 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacing tool for maintaining a cover thickness of a reinforcing bar at a predetermined thickness when constructing a reinforced concrete structure.

[0002]

2. Description of the Related Art As shown in, for example, Japanese Utility Model Laid-Open No. 63-15280, a conventional space retainer of this type has a curved shape on which a reinforcing bar can be placed on the upper end surface of a cylindrical spacer body. A recess is formed, and the spacer body is erected on the slab weir plate, and then a reinforcing bar is placed on the recess of the spacer body, and the reinforcing bar is fixed to the slab dam plate in a predetermined manner. It is arranged to be spaced apart.

[0003]

In the above-mentioned spacing holder, however, the spacer body cannot be assembled to the reinforcing bar in advance, so that the spacer body is slab-mounted at the work site as described above. Since the reinforcing bars must be placed on the spacer body after being installed on the dam plate, the workability of laying the reinforcing bars is poor, and it takes time to pour concrete on site.

Further, in the above-mentioned spacing holder, since the spacer body is simply interposed between the slab dam plate and the reinforcing bar, for example, when the slab dam plate is inclined. Alternatively, or when the concrete is vibrated during pouring, the spacer body may be displaced from a predetermined installation position or fall down, so that the reinforcing bar retaining function is not fulfilled.

The present invention was developed in view of the above circumstances, and an object of the present invention is even when the slab weir plate is inclined or when concrete is vibrated during pouring. It is an object of the present invention to provide a space holder that does not cause the spacer body to be displaced from a predetermined installation position or to fall over, and yet does not easily serve as a barrier for pouring concrete.

[0006]

According to the present invention, however, the spacer body 1 having a predetermined length for setting the cover thickness of the reinforcing bar A is provided.
And a hollow holding portion 21 which is attached to one end of the spacer body 1 in the length direction for setting the covering thickness, and in which the reinforcing bar A can intervene, and an opening portion in which the reinforcing bar A is intervened in the holding part 21. 22 and a holding body 21 that elastically holds the reinforcing bar A by the holding body 21.

The spacer body 1 may be made of a ceramic material and have a circular cross-section, or the end surface of the spacer body 1 on the side opposite to the side where the holding body 2 is attached may be a spherical surface 12.

[0008]

According to the present invention, when pouring concrete, the opening 22 is previously provided at a predetermined position of the reinforcing bar A.
From the above, by inserting the rebar A into the hollow holding portion 21 and elastically sandwiching the rebar A through the hollow holding portion 21, the spacing holder is held at a predetermined position of the rebar A. Since it can be placed, it is sufficient to lay the rebar A at the site, and the rebar A can be used by the holding body 2.
As the slab weir plate is inclined at an angle, or even when vibration is applied to the concrete when the concrete is poured onto the slab weir plate, There is no accidental disengagement from A or displacement of the placement position.

According to the present invention, the spacer body 1 is also provided.
When the concrete is poured, the concrete smoothly flows rearward along the outer peripheral surface of the spacer body 1 so that the spacer body 1 becomes an obstacle to the flow of the concrete. There is no.

According to the present invention, the spacer body 1 is also provided.
By making the end portion of the spherical surface 12 a concrete surface, the trace of the spacer body 1 exposed on the outer surface of the concrete can be made very small by removing the slab weir plate after the concrete pouring work, and the breathing of the concrete or There is little influence of subsidence and the spacer body 1
By forming the ceramic material from a ceramic material, it becomes better compatible with the concrete and rust does not occur.

[0011]

EXAMPLE The spacing holder shown in the figure is basically a spacer main body 1 for setting the cover thickness of the reinforcing bar A when the reinforced concrete structure is constructed, and the spacer main body 1 is separately formed. And a holding body 2 for elastically holding the.

The spacer body 1 shown in the figure is formed of a ceramic material into a substantially cylindrical shape, and a blind hole 11 is formed in the axial center of the spacer body 1 so as to open at one end in the length direction of the spacer body 1. The spherical surface 12 is formed on the other end side in the length direction of the spacer body 1.

On the other hand, the holding body 2 is formed from a metallic spring material in a substantially C-shaped cross section, and a hollow holding portion 21 in which the reinforcing bar A can intervene, and the reinforcing bar A in the holding part 21. A pair of support pieces 23 are integrally formed by providing an opening 22 for intervention and by partially cutting and raising the center of the bottom of the hollow holding portion 21 in the holding body 2.

In the holding body 2 described above, with the supporting piece 23 inserted in the blind hole 11 of the spacer body 1, the blind hole 11 is filled with a filling material 3 such as mortar, whereby the spacer body is formed. It is fixed to one end in the length direction.

In the space holder having the above structure, the reinforcing bar A is fitted into the hollow holding part 21 through the opening 22 at a predetermined position of the reinforcing bar A in advance, and the reinforcing bar is inserted through the hollow holding part 21. By elastically sandwiching A, the spacing holder is held at a predetermined position of the reinforcing bar A.

Reinforcing bar A, to which the spacing holder is attached as described above, is placed on slab weir plate B, and said reinforcing bar A is covered with said spacer body 1 on said slab weir plate B by a predetermined covering thickness. It will be installed accordingly.

Thus, the spacing member is the holding body 2
Since the reinforcing bar A is elastically clamped by, for example, when the slab weir plate B is inclined as shown in FIG. 1 or when concrete is poured onto the slab weir plate B. Even in the case where vibration is applied to the concrete, the spacing member does not inadvertently disengage from the reinforcing bar A or the arrangement position shifts.

In the above embodiments, however, since the spacer body 1 is formed in a circular cross section, when the concrete is poured, the concrete smoothly flows backward along the outer peripheral surface of the spacer body 1. The spacer body 1 does not hinder the flow of the concrete.

In the above embodiment, the slab weir plate B is used.
Since the end of the spacer body 1 that abuts on the spherical surface 12 is a spherical surface 12, the traces of the spacer body 1 exposed on the outer surface of the concrete by the removal of the slab weir plate B after the concrete pouring work are very small. Also, since the spacer body 1 is made of a ceramic material, it is well compatible with the concrete and does not cause rust.

In the above embodiments, one end side in the length direction of the spacer body 1 is the spherical surface 12, but the present invention is not limited to this, and it may be formed in a truncated cone shape as shown in FIG. 4, for example. , One end side in the length direction of the spacer body 1 is a smooth surface 1
The spacer main body A may be
Can be stably placed on the slab barrier plate B.

In the above embodiments, the cross-sectional shape of the spacer body 2 is circular, but it is not limited to this and may be, for example, elliptical or rectangular.

Although the holding body 2 is formed of a metallic spring material, the holding body 2 is not limited to this and may be formed of, for example, a synthetic resin material or a rubber material.

[0023]

As described above, according to the spacing holder according to the present invention, when the concrete is poured, the rebar A is inserted into the hollow holding part 21 from the opening 22 at a predetermined position of the rebar A in advance. The hollow holding portion 21
By elastically sandwiching the rebar A via the, it is possible to hold the interval holder at a predetermined position of the rebar A, so that the laying work of the rebar A on site can be easily performed. Moreover, since the reinforcing bar A is elastically held by the holding body 2, for example, when the slab dam plate is inclined, or when concrete is poured onto the slab dam plate, Even when the concrete is vibrated, there is no risk that the concrete will be inadvertently detached from the rebar A or the arrangement position will shift.

According to the present invention, the spacer body 1 is also provided.
When the concrete is poured, the concrete smoothly flows rearward along the outer peripheral surface of the spacer body 1, and the spacer body 1 does not hinder the flow of the concrete. Therefore, the concrete pouring work can be performed more reliably.

According to the present invention, the spacer body 1 is also provided.
By making the end portion of the spherical surface 12 a concrete surface, the trace of the spacer body 1 exposed on the outer surface of the concrete can be made very small by removing the slab weir plate after the concrete pouring work, and the breathing of the concrete or There is little influence of subsidence and the spacer body 1
By forming the ceramic material from the ceramic material, the compatibility with the concrete is improved, and rust is not generated.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a gap holding according to the present invention.

FIG. 2 is a vertical sectional view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view showing another embodiment of the distance holding according to the present invention.

[Explanation of Codes] 1 Spacer body 12 Spherical surface 2 Holding body 21 Hollow holding part 22 Opening part A Reinforcing bar

Claims (4)

[Claims] 1. A spacer main body 1 for holding a cover thickness of a reinforcing bar A at a predetermined thickness when constructing a reinforced concrete structure, the spacer main body 1 having a predetermined length for setting the cover thickness of the reinforcing bar A, A hollow holding portion 21 which is attached to one end of the spacer body 1 in the length direction for setting the covering thickness and in which the reinforcing bar A can intervene, and an opening portion 22 in which the reinforcing bar A is intervened in the holding part 21. Holding the holding part 2
1. A rebar spacing holder comprising a holding body 2 for elastically holding the rebar A at 1. 2. The rebar spacing holder according to claim 1, wherein the spacer body 1 is made of a ceramic material. 3. The rebar spacing holder according to claim 1, wherein the spacer body 1 has a circular cross-sectional shape. 4. The rebar spacing holder according to claim 1, wherein an end surface of the spacer body 1 on the side opposite to the mounting side of the holding body 2 is a spherical surface 12.