JPH06146479A - Method for constructing ferro-concrete using spacer - Google Patents

Abstract

PURPOSE:To make works efficient by preparing a spacer whose side face is tapered and oversurface is provided with reinforcing steel bar placing grooves equipped with a step, arranging reinforcing steel bars intersecting on this spacer, and thereupon placing concrete. CONSTITUTION:A spacer 1 of concrete or mortar, is prepared whose side face 12 is tapered as thinning from the undersurface 11 toward the topsurface 10. Grooves 13, 13' for placing reinforcing steel bars are formed equipped with a step in the longitudinal and transverse directions on the topsurface 10 of the spacer 1. Reinforciny steel bars T are arranged in these grooves 13, 13' in such a way as intersecting and with a step provided, or bar arrangement is made with different height selected followed by placing of concrete C, whereby the spacer 1 is embedded together with the reinforcing steel bars T. This permits hindering the bars from dislocation or moving in the course of arranging the bars.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced concrete construction method using a spacer, and more particularly to a reinforced concrete construction method in which the reinforcing bars are laid in a floating state in the spacer to perform concrete placement.

[0002]

2. Description of the Related Art As a spacer used to float a reinforcing bar on a concrete placing base, a rectangular parallelepiped block spacer formed of concrete or mortar has been used. In order to manufacture this rectangular parallelepiped concrete spacer, concrete or the like is poured and molded into a mold made by assembling a metal or wooden frame plate to manufacture it.

However, since the molds made of metal and the like are expensive to manufacture, and are bulky, a large space is required for storing the molds, and it is troublesome to handle the concrete during molding. Especially, it took a lot of labor to remove the concrete spacer after molding, and it was troublesome to maintain and repair the formwork. Further, the production amount of the spacers is limited to the number of molds, which has a high cost, which is unsuitable for mass production of the spacers.

Therefore, when a molding die made of synthetic resin is used, the injection molding of concrete is easy and the cost is low, but in the case of a conventional rectangular parallelepiped-shaped spacer, it is difficult to remove the mold after molding. However, it was difficult to manufacture with the synthetic resin mold. Further, the above-mentioned rectangular parallelepiped-shaped spacer has poor stability when used in a vertically elongated state,
It also had the drawback of being easy to fall or tilt.

Further, in the above-mentioned conventional spacer, since the reinforcing bar is only placed on the flat upper surface, the reinforcing bar is easily displaced or moved, and there is a drawback that the reinforcing bar requires a technique. Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a spacer that is suitable for production by the molding die made of the synthetic resin, and that is also excellent in stability during use because it is easy to arrange reinforcing bars. It is used to facilitate reinforced concrete construction.

[0006]

[Means for Solving the Problems] As a reinforced concrete construction method for achieving the above-mentioned object, a concrete or mortar spacer having tapered side surfaces that taper from bottom to top is used for concrete placement. Place the bar on the lower ground, and arrange the reinforcing bars in one or both of the reinforcing groove mounting concave grooves formed on the upper surface of the spacer and with steps, and then place concrete on the base and place the spacer together with the reinforcing bar. It is characterized by being embedded in concrete.

[0007]

[Operation] According to the above enforcement method, the spacer is placed on the concrete pouring base, and the reinforcing bar is inserted and supported in one or both of the stepped orthogonal grooves having the step in the spacer. By doing so, it is possible to select different reinforcing bar height positions, or to arrange reinforcing bars orthogonally by providing steps at different heights, which facilitates reinforcing bar reinforcement. Further, since the side surface is formed in a taper shape that becomes thinner from the lower side to the upper side, it can be stably used on the mounting.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the spacer 1 has an upper surface 10 and a lower surface 11 that are substantially quadrangular and are formed substantially parallel to each other, and a side surface 12 is formed in a taper shape that becomes thinner from the lower surface 11 side to the upper surface 10 side. Was done,
The so-called truncated quadrangular pyramid is formed, and the ridge lines at the four corners of the side surface 12 are formed in a small round shape. The spacer 1 is in the form of a block integrally formed of concrete or mortar. However, in terms of strength, those made of concrete are most preferable.

As for the shape of the spacer 1, if the upper and lower surfaces 10 and 11 are substantially parallel to each other, in addition to the truncated truncated pyramid shown in the figure, a polygon such as a triangle or a hexagon, or a truncated shape of any other shape such as a circle. It can be implemented in the shape of a cone. The height of the spacer 1 is various according to the height of the reinforcing bar in use, and the taper of the side surface 12 facilitates die-cutting when molding the spacer 1 and stabilizes it in use. The property is set appropriately in consideration of the property, the integrity with concrete after concrete construction, and the like.

Then, the upper surface 10 of the spacer 1 is formed with concaves and convexes 13 and 13 'for placing the reinforcing bars in both vertical and horizontal directions in both vertical and horizontal directions, one of which is a semicircular shape. The groove 13 'in the direction orthogonal to this is the groove 1
It is formed in a U shape deeper than 3. Therefore, since the reinforcing bars can be placed by making a step in the vertical and horizontal concave grooves 13 and 13 ', the spacer 1 can be used at the intersection of the reinforcing bars, or one type of spacer 1 for mounting the reinforcing bars having different heights. It becomes possible to share it.

The upper surface 1 of the spacer 1 is as described above.
Since the concave grooves 13 and 13 'are formed in 0, the upper surface 10
The flatness of itself and the parallelism with the lower surface 11 do not need to be formed so strictly. Next, construction using the spacer 1 will be described with reference to FIG. The figure shows the case where floor construction of a building is performed. When the reinforcing bars T are laid on the upper part of the base plate M such as a membrane plate or a base concrete, the spacer 1 is sequentially placed on the base M. , The reinforcement 1 is arranged on the spacer 1 so that the reinforcement T is supported.

Depending on the height of the reinforcing bar T to be reinforced, spacers 1 having different heights may be used, or as shown in FIG. 2, a step may be formed at the intersection of the reinforcing bars T to arrange the bars. ,
It is possible to select and use one of the heights of the concave grooves 13 and 13 'in two directions (not shown). Then, after the reinforcing bars T have been laid out as described above, the concrete C is driven onto the concrete placing base M, and the concrete is applied with the spacers 1 embedded together with the reinforcing bars T.

In addition to the above-mentioned floor construction, the spacer 1 is
It can also be freely applied to reinforced concrete construction on walls, ceilings, and various other structures. Next, for manufacturing the spacer 1, as shown in FIG. 3, polystyrene, high-impact polystyrene, polyethylene,
A sheet-shaped molding die 2 made of various synthetic resins such as polypropylene and formed by a sheet molding means such as vacuum molding is used, and concrete or mortar is injected into a molding recess 20 formed in the molding die 2 to mold the molding. The spacer 1 is manufactured by solidifying. Then, the molding recess 20
Since the tapered side surface corresponding to the side surface of the spacer 1 is formed in the mold, the spacer 1 after molding is very easily die-cut, and the mold 2 made of a synthetic resin sheet is used.
The molding of 0 itself becomes easy. Incidentally, the molding recess 20
A molding projection 21 corresponding to the shape of the reinforcing bar mounting concave groove 13 is formed on the bottom of the groove so that the concave groove 13 can be easily molded.

For forming the other concave groove 13 'so as to form the orthogonal concave grooves 13 and 13' with steps, the middle mold 22 corresponding to the shape of the concave groove 13 'is inserted and both concave grooves 13 and 13' are inserted. The molding process is easy. According to the spacer used for the above-mentioned reinforced concrete construction, since the side surface is formed in a taper shape in the vertical direction, it is possible to use a synthetic resin molding die without using a conventional metal or wooden formwork. It becomes possible to manufacture.

That is, since the side surface is formed in a tapered shape, it can be easily manufactured by a synthetic resin mold, which is very effective in reducing the manufacturing cost and manufacturing time of the spacer. Moreover, if the sheet-made mold is used, since the mold is not bulky and can be easily manufactured, it can be prepared in a large amount and is suitable for mass production of spacers.

[0016]

According to the present invention, the above-mentioned unique spacer is used, and since the spacer has a side surface formed in a tapered shape, the wide lower surface is used as a foundation for concrete pouring during use. By placing and placing it on, the spacer can be installed stably without tilting or falling, and when pouring concrete on the upper surface of the spacer, it can be poured smoothly along the tapered side surface. .

In particular, according to the present invention, since the recessed groove for mounting the reinforcing bar of the spacer is formed in both vertical and horizontal directions and in a step shape, the reinforcing bar can be reliably positioned and supported with a step. That is, it is possible to use spacers at the intersections of the reinforcing bars, or select different heights to arrange the reinforcing bars for the construction of reinforced concrete, and the spacers are embedded in the concrete together with the reinforcing bars. The side surface of the spacer is tapered from the lower side to the upper side, so that the reinforcing bar can be supported stably, and it is possible to completely prevent the position of the reinforcing bar from shifting or moving during the reinforcing bar arrangement.

Therefore, it can greatly contribute to the efficiency of the reinforcing work and the stabilization of the reinforcing work, which can contribute to the efficiency of the reinforced concrete construction.

[Brief description of drawings]

FIG. 1 is a perspective view of a spacer used for construction.

FIG. 2 is a cross-sectional view of a construction state using the spacer.

FIG. 3 is a cross-sectional view at the time of manufacturing a spacer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spacer 10 Upper surface 11 Lower surface 12 Side surface 13,13 'Recessed groove for mounting rebar M Base T Rebar C Concrete

Claims (1)

[Claims] 1. A rectangular or stepped cross-section formed on the upper surface of a spacer by placing a concrete or mortar spacer whose side surface is tapered from the lower side toward the upper side on a concrete placing base. A reinforced concrete construction method using a spacer, which comprises arranging a reinforcing bar on one or both of the reinforcing groove mounting grooves, and then placing concrete on the foundation to embed the spacer together with the reinforcing bar in the concrete.