JP2002047760A - Reinforcement spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement spacer capable of easily supporting a reinforcement on the reference surface in a stable state and having no sense of incompatibility with the concrete surface in a state of completion. SOLUTION: The reinforcement spacer 1 for supporting the reinforcement at a regular interval from the reference surface such as ground or form bottom or the like includes a block-shaped spacer body 2 and a reinforcement supporting tool 3 fitted in a mounting groove 5 provided to a reinforcement supporting surface 4 of the spacer body 2 in a detachable manner, and it is so constituted that the spacer body 2 has a plurality of projections 6 on the surface coming into contact with the reference surface so as to come into point contact therewith.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar spacer for supporting a reinforcing bar at a predetermined distance from a reference surface such as the ground or the bottom surface of a formwork when concrete is poured.

[0002]

2. Description of the Related Art For example, in order to manufacture a precast concrete slab in which a large number of reinforcing bars are embedded, a method of arranging a reinforcing bar at a predetermined position inside a formwork and then pouring concrete into the formwork is adopted. However, in order to arrange the reinforcing bars, it is necessary to hold the reinforcing bars at a predetermined distance from the bottom of the formwork. Therefore, a jig made of concrete and placed on the bottom of the formwork is required. A type in which a reinforcing bar is used thereon and a type in which the reinforcing bar is sandwiched by elasticity using a plastic jig and supported on the bottom surface of the mold are adopted. Each of the jigs is called a so-called reinforcing bar spacer.

As a reinforcing bar spacer, for example,
Japanese Utility Model Laid-Open Publication No. 1-143824 discloses a substantially rectangular parallelepiped shape in which long and short sides are provided with grooves for mounting reinforcing bars, and four corners of the periphery are chamfered. Japanese Patent Application Laid-Open No. 62-160026 discloses a type in which irregularities for concrete penetration are formed in a portion other than a portion where a reinforcing bar is placed, and the reinforcing bar is fixed to the spacer body by a fixing bracket.

[0004]

In the case of the former reinforcing bar spacer, the reinforcing bar is simply placed on the reinforcing bar mounting groove, and the reinforcing bar is not fixed to the reinforcing bar spacer. Is likely to be unstable, and when pouring concrete into the form using a vibrator, there is a concern that the position of the reinforcing steel with respect to the reinforcing steel spacer is shifted due to vibration or the flow pressure of the concrete. Further, when it is necessary to correct the arrangement position of the reinforcing bar, the reinforcing bar spacer and the reinforcing bar must be moved separately, which is troublesome. In addition, the contact surface between the reference surface and the spacer body is in surface contact, and the reinforcing bar spacers appear on the concrete surface, giving rise to a drawback of giving a sense of incongruity after completion.

[0005] On the other hand, in the latter case, the spacer body and the reinforcing bar can be integrated with the fixing metal. Therefore, first, the reinforcing bar and the spacer main body can be fixed by the fixing metal, and then the reinforcing steel can be arranged in the mold. There is an advantage in that the arrangement position of the reinforcing bars can be easily corrected because the reinforcing spacers can be corrected together. However, even in this example, the contact surface between the reference surface and the spacer body is in line contact, and the reinforcing spacers appear linearly on the concrete surface, giving rise to a drawback after completion.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to easily support a reinforcing bar on a reference surface in a stable state, and to provide a feeling of strangeness on a concrete surface in a completed state. The aim is to provide no reinforcing bars.

[0007]

That is, a reinforcing bar spacer according to the present invention is a reinforcing bar spacer for supporting a reinforcing bar at a predetermined distance from a reference surface such as the ground or the bottom surface of a formwork. Block-shaped spacer main body, and a reinforcing bar support that is removably fitted in a mounting groove provided in the reinforcing bar supporting surface of the spacer main body, and the spacer main body has a plurality of convex portions on a contact surface with a reference surface. It is characterized by providing a point contact.

In the reinforcing bar spacer according to the present invention, the convex portion of the spacer main body is formed in a hemispherical shape or a shape obtained by cutting a sphere at a predetermined height, and a top portion thereof is in contact with the reference surface. Is also characterized.

In the reinforcing bar spacer according to the present invention, the reinforcing bar support is formed by bending a metal plate having a suitable elasticity substantially symmetrically at the center in the left-right direction, and fitting the base into the mounting groove and the reinforcing bar. It is also characterized in that a holding portion to be attached and a guide portion formed at the tip of the holding portion are formed.

According to the reinforcing bar spacer of the present invention, since the spacer body is provided with a plurality of convex portions on the contact surface with the reference surface so as to make point contact, the reinforcing bar is stably placed on the reference surface, and It has become possible to provide a reinforcing steel spacer that can be easily supported and that does not cause any discomfort on the concrete surface in a completed state.

[0011] Further, the rebar support is mounted on the spacer body, and the rebar is fitted to the holding portion of the rebar support to support the rebar. Therefore, the reinforcing bar is fitted into the holding portion and integrated with the reinforcing bar spacer, and therefore, the supporting state of the reinforcing bar is always stabilized. Also,
Since the rebar can be arranged with the rebar in a state where the rebar spacer is mounted, the rebar can be easily arranged or its position can be easily corrected. Also, the reinforcing bar substantially holds the reinforcing bar, and the reinforcing bar is mounted in a state where the reinforcing bar is mounted on the spacer body. Therefore, the setting of the reinforcing bar is not troublesome and the handling is easy. At this time, the convexity of the spacer main body secures the sliding with the reference surface, so that the workability such as the position correction is greatly improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a reinforcing bar spacer according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of a reinforcing bar spacer according to the present invention.
FIG. 2 is a perspective view as viewed obliquely from below, and FIG. 3 is a cross-sectional view showing the state of use.

1 to 3, reference numeral 1 denotes an entire reinforcing bar spacer. The reinforcing bar spacer 1 includes a block-shaped spacer body 2 and a reinforcing bar support 3 detachably mounted on the spacer body. It is composed of

The block-shaped spacer body 2 is formed by molding high-strength concrete, and resin concrete and other high-strength concrete materials can be suitably used. The spacer body 2 has a substantially rectangular cross section and a substantially inverted trapezoidal vertical cross section. The reinforcing bar supporting surface 4 of the spacer body 2 is provided with a mounting groove 5 for detachably inserting the reinforcing bar support. The mounting groove 5 is formed in a slit shape having substantially the same width from the opening to the bottom.

The block-shaped spacer body 2 is provided with a plurality of projections 6 on the contact surface with the reference surface, and is formed so as to make point contact with the reference surface. The convex portion 6 provided on the spacer body 2 is preferably formed in a hemispherical shape or a shape obtained by cutting a sphere at a predetermined height, and the top portion comes into contact with the reference surface as shown in FIG. -ing Of course, the structure of the convex portion 6 is not limited to the above-described hemispherical structure, and any structure can be applied as long as it has a pyramidal shape or any other structure that allows point contact. Also, the numbers are formed at the four corners of the rectangle in the figure, but are not limited to four as long as they have stability. Reference numeral 7 denotes a groove provided on the contact surface side with the reference surface for improving the flow of cast concrete.

As the reinforcing bar support fitting 3 to be inserted into the mounting groove 5 of the spacer body 2, a metal plate having appropriate elasticity and high rust resistance, for example, stainless steel is hardened at a predetermined temperature to obtain an elasticity. For example, those with improved characteristics are used. In addition, a spring rope may be used if it is not particularly necessary to consider rust prevention. A single metal plate having appropriate elasticity is bent symmetrically at the center in the left and right directions by means of press working or the like, and a base portion 11 having a predetermined width to be fitted into the mounting groove 5 and a circle for clamping the reinforcing bar 21 are provided. Clamping part 12 with arc-shaped cross section
And a guide portion 13 formed outward at the tip of the holding portion 12.
It is processed to have. Therefore, the guide part 1
3 while reducing the width of the base portion 11
Into the mounting groove 5 and release the hand from the guide portion 13.
The width of the base portion 11 is increased by the elasticity of the reinforcing bar support 3.
At this time, the base portion 11 is engaged with the outer edge of the opening of the mounting groove 5 and is prevented from falling off.

Note that the shape and size of the arc of the clamping portion 12,
The length and the like of the guide portion 13 can be appropriately determined according to the size and the like of the reinforcing bar 21 to be fitted. Also base part 1
1, the notch 1 and the guide 13 have notches 1
4 can be formed. The notch 14 is useful for increasing the elasticity of the metal plate constituting the reinforcing bar support 3.

When using the reinforcing bar spacer 1 of the present invention, first, the base 11 of the reinforcing bar support 3 is mounted in the mounting groove 5 of the spacer body 2. The reinforcing bar 21 is fitted to the holding portion 12 of the reinforcing bar support 3 to support the reinforcing bar 21.
Therefore, the reinforcing bar 21 is fitted into the holding portion 12 and is integrated with the reinforcing bar spacer 1 of the present invention, so that the supporting state of the reinforcing bar is always stabilized. In addition, since the reinforcing bar 21 can be disposed with the reinforcing bar 21 in a state where the reinforcing bar spacer 1 is mounted, the reinforcing bar 21 can be easily disposed or its position can be easily corrected. Further, the reinforcing bar 21 is substantially held by the reinforcing bar support 3, and the reinforcing bar 21 is mounted while the reinforcing bar support 3 is mounted on the spacer body 2. Not easy to handle. At that time, since the convex portion 6 of the spacer body 2 secures the sliding with the reference surface, the workability such as the position correction is greatly improved.

[0019]

According to the reinforcing bar spacer of the present invention, since the spacer body is provided with a plurality of convex portions on the contact surface with the reference surface so as to make point contact, the reinforcing bar is stably placed on the reference surface. It is possible to provide a reinforcing bar spacer which can be supported easily and does not cause any unnatural feeling on the concrete surface in a completed state.

Further, the reinforcing member is supported by mounting the base of the reinforcing bar support on the spacer body, and the reinforcing bar is fitted to the holding portion of the reinforcing bar support to support the reinforcing bar. Therefore, the reinforcing bar is fitted into the holding portion and integrated with the reinforcing bar spacer, and therefore, the supporting state of the reinforcing bar is always stabilized. Also,
Since the rebar can be arranged with the rebar in a state where the rebar spacer is mounted, the rebar can be easily arranged or its position can be easily corrected. Also, the reinforcing bar substantially holds the reinforcing bar, and the reinforcing bar is mounted in a state where the reinforcing bar is mounted on the spacer body. Therefore, the setting of the reinforcing bar is not troublesome and the handling is easy. At this time, the convexity of the spacer main body secures the sliding with the reference surface, so that the workability such as the position correction is greatly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a reinforcing bar spacer of the present invention.

FIG. 2 is a perspective view seen from obliquely below.

FIG. 3 is a sectional view showing a state of use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcing bar spacer 2 Spacer main body 3 Reinforcing bar support 4 Reinforcing bar support surface 5 Mounting groove 6 Convex portion 7 Concave groove 11 Base portion 12 Clamping portion 13 Guide portion 14 Notch 21 Reinforcing bar

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Ono 87-1 Shimotsukari, Nagaizumi-cho, Sunto-gun, Shizuoka Pref.

Claims (3)

[Claims] A rebar spacer for supporting a rebar at a predetermined distance from a reference surface such as the ground or the bottom surface of a formwork, wherein a block-shaped spacer body mounted on the reference surface and A rebar support tool removably fitted into a mounting groove provided on the rebar support surface, and the spacer body is provided with a plurality of protrusions on a contact surface with the reference surface so as to make point contact. Spacer for reinforcing bars. 2. The method according to claim 1, wherein the convex portion of the spacer body is formed in a hemispherical shape or a shape obtained by cutting a sphere at a predetermined height, and a top portion thereof comes into contact with the reference surface. 2. The reinforcing bar spacer according to 1. 3. A base member for bending a metal plate having an appropriate elasticity substantially at the center in the left-right direction and fitting it into the mounting groove, and a clamping portion for clamping a reinforcing bar. The reinforcing bar spacer according to claim 1 or 2, wherein a guide portion formed at a tip of the holding portion is formed.