JPH0744539U - spacer - Google Patents

Abstract

(57) [Summary] [Purpose] Can be installed regardless of the size of the reinforcing bar, has good adhesion to concrete, has excellent load resistance and impact resistance, and has excellent durability, workability, and economic efficiency. Providing spacers. [Structure] A fiber-reinforced high-strength mortar, which is composed of a bilaterally symmetrical triangular body with a concave central portion on each side, and a fastener made of highly elastic steel wire. Are embedded in symmetrical positions near the two vertices of the body. With such a shape, it can be mounted regardless of the size of the reinforcing bar and has good adhesion to concrete.
Since the material of the main body is fiber-reinforced high-strength mortar, the main body is excellent in load resistance and impact resistance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spacer for supporting a reinforcing steel bar embedded in a concrete member on a mold for molding a concrete member.

[0002]

[Prior art]

 Conventionally used spacer materials include plastic and resin coating steel rods.

[0003]

[Problems to be solved by the device]

 However, if the material of the spacer is plastic, the strength of the plastic is not sufficient, so that the spacer itself has poor load resistance. Furthermore, since the thermal expansion coefficient of the plastic differs from that of the cast concrete for concrete members, the heat of hardening of the steam curing cement creates a gap at the interface between the concrete and the spacer, which facilitates water infiltration. .

Further, if the material is a resin coated steel rod, the load resistance and impact resistance are strong depending on the shape of the spacer itself, but there is a drawback that the spacer itself rusts due to water penetration. Workability is poor because welding is required for mounting.

The present invention has been devised in view of the above-mentioned circumstances, and its purpose is to easily support the reinforcing bars even when the thickness of the concrete part is large and the weight of the reinforcing bars is large, and the load resistance is improved. ， To provide a spacer that has excellent impact resistance, durability, workability, and economic efficiency.

[0006]

[Means for Solving the Problems]

 The spacer of the present invention is made of fiber-reinforced high-strength mortar and has a symmetrical triangular shape, and is made of a body with a recess in the center of each side and a steel wire with a large elastic restoring force, and the tip is curved. The two locks are embedded in the body at symmetrical positions near the two vertices of the body.

The first feature of the present invention is that the material of the spacer body is fiber-reinforced high-strength mortar, which allows the spacer itself to have excellent load resistance and impact resistance. . When molding a fiber-reinforced high-strength mortar, glass fibers, carbon fibers, aramid fibers and other high-rigidity fibers are used alone or in combination.

These fibers are well mixed with the high strength mortar component prior to forming the fiber reinforced high strength mortar. It is practical to use glass fiber in terms of economy.

A second feature of the present invention is that the shape of the spacer body is a symmetrical triangle, and a recess is provided at the center of each side, and the recess is reinforced by the recess on the reinforcing bar side for inner reinforcement. The spacer body can be attached to the reinforcing bar regardless of the diameter of the reinforcing bar. The remaining two recesses are the passages for the cast concrete, and since concrete is also present in these recesses, the adhesion between the cast concrete and the spacer body is improved. In addition, because it is bilaterally symmetric, there are few restrictions due to the direction in which it is attached to the reinforcing bar.

A third feature of the present invention is a locking device, in which two bending members at the tip of the locking device are applied to a reinforcing bar which is embedded in the main body and is orthogonal to the reinforcing bar to be mounted. Can be easily installed. Also, because the material is a steel wire with a large elastic restoring force, even if the relative position of the spacer body and the reinforcing bar changes considerably depending on the diameter of the reinforcing bar to be mounted, it can be easily mounted following the change. To be done. This locking tool may be embedded together when the main body is molded, or a main body having a small hole may be molded, and the lower part of the locking tool may be fitted into the small hole.

In addition, in the spacer of the present invention, the spacer body is locked to the reinforcing bar, and the apex of the triangle on the opposite side is pressed against the mold surface to be supported and fixed. The gap between the reinforcing bar and the reinforcing bar is maintained in a predetermined manner.

[0012]

【Example】

 Hereinafter, the spacer of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a spacer according to the present invention. The main body 1 is manufactured by molding high-strength mortar mixed with glass fibers. At the time of molding, recesses 2, 2 and 3 and small holes 4 and 4 are provided. FIG. 2 is a perspective view of the locking tool 5. The locking tool 5 is made of a highly elastic steel wire, the lower part 6 is processed into a spiral shape to form a spring, and the upper end is curved.

The locking tool 5 is fitted into the small holes 4 and 4 of the main body 1.

3 and 4 are sectional views showing a state in which the spacer of the present invention is mounted on the same mold, FIG. 3 shows a case where the diameter of the reinforcing bar is small, and FIG. 4 is a reinforcing bar. The case where the diameter of is large is shown. The main body 1 is in contact with the reinforcing bar 7 in the concave portion 3 and is locked to the reinforcing bar 8 which directly intersects with the reinforcing bar 7 by the locking tool 5, and the apex on the opposite side of the main body 1 is crimped to the side mold surface 9. As shown in FIG. 3, when the diameter of the reinforcing bar 7 is small, the locking tool 5 is locked to the reinforcing bar 8 without being far from the fitting surface of the main body 1, but as shown in FIG. As the thickness increases, the locking tool 5 is separated from the fitting surface of the main body 1 and locked to the reinforcing bar 8. Thus, the spacer of the present invention can be applied to all reinforcing bars regardless of the diameter of the reinforcing bar 7.

[0016]

[Effect of device]

 Since the spacer body of the present invention is a high-strength mortar and is reinforced by fibers, it does not cause damage to concrete compaction by a vibrator with excellent impact resistance and high vibration. Adhesion is good and water does not easily penetrate. In addition, since there is no iron material in the so-called cover of the rebar, corrosion such as rusting does not occur.

Moreover, since the spacer of the present invention can be attached only by attaching the reinforcing bar to the curved portion at the tip of the locking tool, not only the workability is improved, but also all the reinforcing bars for reinforcement are irrespective of the diameter of the reinforcing bar. Applicable to

[Brief description of drawings]

FIG. 1 is a perspective view showing a spacer of the present invention.

FIG. 2 is a perspective view showing a locking tool of the spacer of the present invention.

FIG. 3 is a vertical cross-sectional view when the spacer of the present invention is attached to a reinforcing bar having a small diameter.

FIG. 4 is a vertical cross-sectional view when the spacer of the present invention is attached to a reinforcing bar having a large diameter.

[Explanation of symbols]

1 ・ ・ Spacer body, 2 ・ ・ Concrete casting recess, 3 ・ ・ Reinforcing bar mounting recess, 4 ・ ・ Locking tool insertion small hole, 5 ・ ・ Locking tool, 6 ・ ・ Locking tool spring part, 7 ・ ・ Main rebar, 8 ・ ・ Auxiliary rebar, 9 ・ ・ Side formwork surface, 10 ・ ・ Bottom formwork surface.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Akira Kase 9-4-10 Akasaka, Minato-ku, Tokyo (72) Creator Tsukasa Chiba 559-7 Hizuka, Kumagaya-shi, Saitama Prefecture (72) Creator Akihiko Ito Higashimatsuyama, Saitama Prefecture 3-6 Rokutan-cho, Ichi (72) Inventor Masato Matsuda 1871 Ooka, Higashimatsuyama, Saitama Prefecture (72) Inventor Kenichi Tamura 3-4 Futabacho, Itabashi-ku, Tokyo Sanshin Giken Co., Ltd. (72) Inventor Kimio Ishii 2409 Hirado, Kumagaya-shi, Saitama

Claims (1)

[Scope of utility model registration request] 1. A body made of fiber-reinforced high-strength mortar and having a symmetrical triangle shape, a main body having a recess at the center of each side, and a steel wire with a large elastic restoring force, and the tip is curved. The spacers are two spacers embedded in the body at symmetrical positions near the two vertices of the body.