JP3063525U - Reinforcing support for formwork - Google Patents

Abstract

(57) [Summary] [Problem] In a reinforcing bar support for a formwork, a leg for maintaining a predetermined distance between the reinforcing member holding device and the formwork is made of a concrete-free leg. And a material having good adhesion and integration, and an area where the legs are exposed on the surface of the concrete structure is reduced. SOLUTION: A mortar cone 1 is used as a leg for maintaining a space between a reinforcing bar holding tool 2 and a mold 17 at a predetermined length,
In addition, at least 3
The small projection-shaped dowels 6 are integrally provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 TECHNICAL FIELD The present invention relates to a reinforcing bar support for a formwork that supports a reinforcing bar on a formwork at the time of arranging the reinforcing bar prior to placing concrete.

[0002]

[Problems to be solved by the invention]

 Conventionally, this type of reinforcing bar support not only has a reinforcing bar holding device but also a distance between the reinforcing bar holding device and the formwork (this interval is the cover thickness of the reinforcing bar in the concrete structure). The height of the legs is also made of metal such as a metal plate or a metal rod, so that the concrete hardens and the formwork is removed from the surface of the concrete structure. The rust was exposed and rust was generated, and the appearance was bad and the strength of the concrete structure was adversely affected.

[0003] In view of the above, a method of minimizing the generation of rust by minimizing the portion of the metal material exposed on the surface of the concrete structure by making the lower end of the leg several protrusions, and The invention of Japanese Utility Model Publication No. 1-38189, which is covered with a synthetic resin reinforcement, has been proposed. In the former case, the portion exposed on the surface of the concrete structure is also a metal material. In the latter case, rust does not occur, but in the latter case, synthetic resin, a material different from concrete, is exposed over the entire tip of the leg, which prevents continuous integration of the concrete structure surface. With the passage of time, there was a possibility that a gap might be formed between the synthetic resin reinforcement and the concrete surface.

According to the present invention, a leg for maintaining a predetermined distance (height) between a reinforcing-bar holder and a formwork is made of a material that does not generate rust and has good adhesion and integration with concrete. The purpose of the present invention is to reduce the area of the leg exposed on the surface of the concrete structure.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in the reinforcing bar support for a mold according to the present invention, a mortar cone is used as a leg for maintaining the reinforcing bar holding device at a predetermined distance (height) from the mold. At least three small protruding dowels are integrally provided on the bottom (bottom) of the cone.

[0006]

[Action]

 The rebar holding device of the rebar support device for the inside of the form constructed as described above holds the rebar, and the cone is locked to the form so that the bottom surface thereof is in contact with the form (or on the form). Is placed) at a predetermined distance (height) from the formwork, and the concrete cast on the formwork hardens and then the concrete form is removed. In the structure, the reinforcing bars are arranged with a cover corresponding to the predetermined separation distance. The portion exposed to the surface of the concrete structure is a mortar material cone in the reinforcing bar support, and only a small portion of the dowel provided integrally with the cone is directly exposed.

[0007]

[Embodiment of the invention]

 Embodiments of the invention will be described based on examples with reference to the drawings. In FIG. 1, a cone 1 is a part constituting a leg portion of a reinforcing bar support for a mold according to the present invention, and a reinforcing bar holding device 2 is fixed to an upper surface thereof. The fixing means hardens the mortar in a state in which the anchor portion 12 of the reinforcing bar holder 2 is embedded in a mortar which is a material of the cone 1 (preferably, the mortar has a high strength) when the cone 1 is formed. You. At this time, the reinforcing-bar supporting bottom surface 11 of the reinforcing-bar holder 2 is made to be in close contact with the upper surface of the cone. As shown in FIG. 4, the anchor portion 12 is formed with a U-shaped notch prevention member 13. The side of cone 1 is tapered so that it does not fall off the concrete structure. A small projection-shaped dowel 6 is integrally provided on the bottom surface 3 of the cone 1 with the same mortar as the cone body. If three or more dowels 6 are provided at equal intervals on the center circumference of the cone bottom surface 3, the reinforcing bar support can stably stand on the formwork only by the dowels. FIG. 3 shows an example in which three dowels 6 are provided. As the number of dowels 6 increases, the stability increases, but the number of dowels exposed on the concrete surface increases.

The reinforcing member 2 is made of an elastic plate material such as a metal plate or a synthetic resin plate. FIGS. 4 and 5 show the reinforcing-bar holder 2 formed by metal working from one thin iron plate. Press-cutting from a thin iron plate along the contour, and performing a required bending process on the reinforcing-bar holding member substrate (FIG. 6) in which the opening 14 is punched, the reinforcing-bar holding member 2 shown in FIGS. 4 and 5 is formed. Is done. When the reinforcing member 2 is formed of a synthetic resin, the metal reinforcing member is formed integrally with a metal mold instead of the bending and cutting process of the metal reinforcing member. In the case of the synthetic resin, the thickness of the side plate 15 and the like is increased in terms of strength. Therefore, the side plate 15 is cut off to the upper end at the position of the opening 14 in FIG. Flexible elasticity can be obtained even if the thickness is large. Regarding the structure other than the material, since the metal reinforcing member and the synthetic resin reinforcing member are basically common, the synthetic resin reinforcing member is also described with reference to FIGS. 4 and 5. I do.

The holding portion 7 has a bent shape that is depressed inward in the width direction (the left-right direction in FIG. 5), and the upper portion of the holding portion 7 is formed as an outwardly extending slide guide 10. A V-shaped projection 9 protruding outward is formed at the lower part of the slab to make the rebar holding force of the rebar holder 2 elastic. At both ends in the longitudinal direction of the holding portion 7, claws 8 projecting outward in the longitudinal direction and slightly inclined inward in the width direction of the reinforcing bar holding device 2 are provided.

In order to support the reinforcing bar 16 on the reinforcing bar holder 2, it is sufficient to simply push the reinforcing bar 16 from above the reinforcing bar holder 2. The reinforcing bar 16 is pushed in until it hits the reinforcing bar supporting bottom surface 11 while pushing and expanding the side plate 15 against the slide guide 10, and is firmly held by the holding portions 7 on both sides and the bottom surface 11. Further, the rebar is prevented from shifting in the axial direction by the claws 8 provided at both ends in the longitudinal direction of the holding portion 7.

[0011]

[Effect of the invention]

 Since the present invention has the above-described structure, the cone for maintaining the reinforcing member holding device at a predetermined distance (height) with respect to the mold has good adhesion and integration with concrete, and furthermore, the surface of the concrete structure The exposed area is small and the exposed part is a dowel of the same material as the cone, which does not rust on the surface of the concrete structure and is not very noticeable. There is no danger of bad appearance.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a reinforcing bar support for a mold according to the present invention is used.

FIG. 2 is a side view showing the in-mold reinforcing bar support of the present invention in use.

FIG. 3 is a bottom view of the in-mold reinforcing bar support of the present invention.

FIG. 4 is a front view of a reinforcing-bar holding tool constituting the reinforcing-bar support for a mold.

FIG. 5 is a side view of a reinforcing-bar holding device constituting the reinforcing-bar support for a mold.

FIG. 6 is a front view of a reinforcing bar holding board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cone 2 Rebar holding device 3 Cone bottom surface 4 Cone side surface 5 Cone top surface 6 Dowel 7 Holding portion 8 Claw 9 V-shaped projection 10 Slide guide 11 Reinforcing bar support bottom surface 12 Anchor portion 13 Prevention of detachment 14 Opening 15 Side plate 16 Reinforcing bar 17 Formwork

Claims (6)

[Utility model registration claims] Cone formed by mortar (1)
And a reinforcing bar holder (2) fixed to the upper portion thereof, wherein the cone (1) has a substantially flat upper surface (5) and a bottom surface (3) formed with a small projection-like dowel (6). ) And a side surface (4) connecting the outer peripheries of the two surfaces (5) and (3), and the rebar holding device (2) has a main body having a substantially U-shaped cross section and an anchor portion (12) depending thereunder. The main body is a reinforcing bar supporting bottom (11) and both side plates (15)
The side plate (15) is provided with a slide guide (10), a holding portion (7) and a V-shaped projection (9) in this order from above, and the rebar holding device (2) A reinforcing bar support for a formwork in which the anchor portion (12) is embedded and fixed above the cone (1) in a state where the reinforcing bar supporting bottom surface (11) is in close contact with the upper surface (5) of the cone (1). 2. The reinforcing bar support for a formwork according to claim 1, wherein the reinforcing bar holding member (2) is made of a metal formed by bending a single thin iron plate. 3. The reinforcing bar support for use in a mold according to claim 1, wherein the reinforcing bar holder (2) is made of a synthetic resin integrally molded. 4. A holding portion (7) in a reinforcing bar holding device (2).
2. The mold according to claim 1, wherein at both ends in the longitudinal direction, claws (8) projecting slightly obliquely outwardly and inwardly in the width direction of the reinforcing bar holder (2) are provided. Rebar support 5. The reinforcing bar support according to claim 4, wherein the reinforcing bar holder is made of a metal formed by bending a single thin iron plate. 6. The reinforcing bar support for use in a formwork according to claim 4, wherein the reinforcing bar holding member (2) is made of synthetic resin integrally molded.