JPH0348973Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> This invention relates to a spacer for reinforced concrete construction, and relates to a table-shaped spacer used to support reinforcing bars in a floating state during reinforcing.

<Prior art> Conventionally, a rectangular parallelepiped block-shaped spacer made of concrete or mortar has been used as the above-mentioned spacer, and in order to manufacture this rectangular parallelepiped concrete spacer, metal or wooden frame plates are assembled. It is manufactured by injecting concrete, etc. into the constructed formwork.

However, the manufacturing cost of the metal formwork itself is high, and since the formwork is bulky, a large space is required to store the formwork, and handling during concrete molding is also labor-intensive, especially when molding. Cutting out the concrete spacer later required a lot of effort, and maintaining and repairing the formwork was also troublesome. Furthermore, the production volume of spacers is limited by the number of costly molds available, making it unsuitable for mass production of spacers.

Therefore, if you use a sheet-shaped mold with a recessed part for spacer molding in a synthetic resin sheet,
Injection molding of concrete is easy and inexpensive, but in the case of conventional spacers in the shape of a rectangular parallelepiped, it is difficult to remove the mold after molding, and it has been difficult to manufacture with the above-mentioned mold made of synthetic resin sheet.

Furthermore, the rectangular parallelepiped-shaped spacer does not have good stability when used vertically, and also has the drawback of being prone to falling or tilting.

Furthermore, since the conventional spacer simply places the reinforcing bars on a flat upper surface, the reinforcing bars are likely to shift or move, and the reinforcement work requires skill.

<Purpose> Therefore, the purpose of this invention is to eliminate the drawbacks of the above-mentioned conventional technology, to make it suitable for manufacturing using the mold made of synthetic resin sheet, to facilitate the arrangement of reinforcing bars, and to improve stability during use. We are trying to provide you with a superior spacer.

<Structure> The structure for achieving the above purpose is that the whole block is shaped like a block, the side surfaces are tapered along the vertical direction, the top and bottom surfaces are formed to be inclined to each other, and the top or bottom surface has a shape of a block. is characterized in that a recessed groove for placing reinforcing bars is formed along the inclination direction.

<Example> Next, an example of this invention will be illustrated below with reference to the drawings.

As shown in FIGS. 1 and 2, the spacer 1 has an approximately rectangular parallelepiped shape as a whole, and has upper and lower surfaces 10 and
has a rectangular shape, and the four side surfaces 12 are tapered from the bottom to the top. Also,
The upper surface 10 and the lower surface 11 are formed to be inclined to one side.

The spacer 1 has a block shape that is integrally formed of concrete, mortar, or the like. However, in terms of strength, it is most preferable to use concrete.

In addition, the height of the spacer 1 is various depending on the reinforcement height at the time of use.
The taper of No. 2 and the inclination angle of the upper and lower surfaces 10 and 11 are appropriately set in consideration of the ease of cutting out when molding the spacer 1, stability during use, or integrity with concrete after concrete construction. .

Of the upper and lower surfaces 10 and 11 of the spacer 1, a semicircular reinforcing bar mounting groove 13 is formed along the inclination direction on the upper surface 10, which has a narrow area.
The size of this groove 13 is formed in accordance with the diameter of the reinforcing bar used. However, as long as the reinforcing bars can be fixed in position, it is not necessary to completely adhere to the outer shape of the reinforcing bars, and a groove slightly larger than the diameter of the reinforcing bars, a U-shaped groove 13, a rectangular groove 13, or a V-shaped groove 1 may be used.
3 is also possible.

Note that the groove 13 can also be formed on the lower surface 11 side, which has a larger area, of the upper and lower surfaces 10 and 11 (see FIG. 5).

Furthermore, since the groove 13 is formed on the upper surface 10 or lower surface 11 of the spacer 1 as described above,
Regarding the flatness of the surface itself on which the groove 13 is formed, it is not necessary to form it so strictly.

Next, regarding the use of spacer 1, the third
This will be explained with reference to the drawings and FIG.

Both figures show the case of constructing the floor of a building. When placing reinforcing bars T on the top of membrane plate M, spacer 1 is inserted between reinforcing bar T and membrane plate M, and spacer 1 is inserted between reinforcing bar T and membrane plate M. The reinforcing bars T are placed on the reinforcing bar mounting groove 13 of No. 1 in a supported manner. Therefore, the third
In the figure, the upper surface 10 of the spacer 1 with a narrow area is directed upward, but in FIG.
1 is placed facing upward.

In addition, depending on the height of reinforcing bars T,
It is assumed that spacers 1 having different heights are used as appropriate.

Then, after arranging the reinforcing bars T as described above, concrete C is poured, and a concrete floor is constructed with the spacers 1 still embedded.

The spacer 1 of this invention can be freely applied not only to the floor construction described above but also to reinforced concrete construction for walls, ceilings, and other types of buildings.

Next, as for manufacturing the spacer 1, as shown in Fig. 4, a sheet-shaped mold made of various synthetic resins such as polystyrene, high-impact polystyrene, polyethylene, and polypropylene is formed by sheet-forming means such as vacuum forming. 2, the spacer 1 is manufactured by injecting concrete or mortar into the molding recess 20 formed in the mold 2 and molding and solidifying it.

Note that the molding recess 20 formed in the mold 2 is formed by laying down the spacer 1 sideways and forming the upper and lower surfaces 1.
The spacer 1 is formed so that it can be molded with the spacers 0 and 11 located on the side surfaces of the molding recess 20.
A protrusion 21 is formed along the vertical direction on the side surface of the forming recess 20 in correspondence with the reinforcing bar mounting groove 13 formed on the upper surface 10 or lower surface 11 of the molding recess 20 .

Therefore, a taper corresponding to the upper and lower surfaces 10 and 11 of the spacer 1 is formed on the side surface of the molding recess 20, and the protrusion 21 is also formed along the vertical direction of the side surface, so that the molding The subsequent mold cutting of the spacer 1 and the mold cutting of the mold 2 itself during sheet molding can be easily performed. however,
Regarding the protrusions 21, it is preferable that the protrusions 21 be located on the upper surface 10 side of the spacer 1 because the extraction taper will be larger.

<Effects> According to the spacer 1 of this invention configured as described above, since the side surface 12 is formed in a vertically tapered shape, when in use, as shown in FIG. 11 on the membrane plate M, the spacer 1 can be stably installed without tilting or falling down, and when pouring concrete C onto the top surface of the spacer 1, the tapered side surface 12 It can be poured smoothly.

By forming the reinforcing bar mounting recess 13 on the upper surface 10 of the spacer 1, the reinforcing bar T can be placed in a securely fixed position, and the position of the reinforcing bar T can be prevented from shifting during reinforcement placement. , it becomes possible to completely prevent movement. Therefore, it can greatly contribute to efficiency of reinforcement work and stabilization of reinforcement work.

In addition, as shown in FIG. 5, when the groove 13 is formed on the lower surface 11 of the spacer 1, which has a large area, the spacer 1 is difficult to come out after being embedded in the concrete C. Improves integration with

When manufacturing the spacer 1, it is necessary to make sure that the upper and lower surfaces 10 and 11 are inclined, and that the upper surface 1
By forming the groove 13 for placing reinforcing bars along the inclination direction of the lower surface 11, the mold 2 made of synthetic resin sheet can be formed without using the conventional metal or wooden formwork. It becomes possible to manufacture using

That is, if a molding recess 20 is formed in the mold 2 for molding with the spacer 1 lying on its side, the inclinations of the upper and lower surfaces 10 and 11 of the spacer 1 will serve as a taper for molding, and the spacer 1 will be formed after molding. can be easily cut out. Further, since the protrusion 21 for forming the groove 13 can be formed along the vertical direction on the side surface of the molding recess 20, the molding and cutting of the groove 13 portion can be easily performed.

Therefore, it is possible to manufacture the spacer 1 using the mold 2 made of a synthetic resin sheet, which has many molding restrictions, and the mold 2 itself can be easily manufactured by sheet molding, which reduces the manufacturing cost of the spacer 1. and has a significant effect on reducing manufacturing time. Moreover, if the above-mentioned sheet mold 2 is used,
Since the mold 2 is not bulky and the mold itself is easy to manufacture, a large amount of the mold 2 can be prepared in advance.
It is suitable for mass production of spacers 1.

As described above, it can exhibit various excellent practical effects that are also effective for improving the efficiency of reinforced concrete construction as a whole.

[Brief explanation of the drawing]

The figure shows an example of this invention.
FIG. 2 is a perspective view, FIG. 2 is a side view, FIG. 3 is a sectional view of the device in use, FIG. 4 is a sectional view during manufacture, and FIG. 5 is a sectional view of a modified example in use. 1...Spacer, 10...Top surface, 11...Bottom surface, 12...Side surface, 13...Concave groove for placing reinforcing bar, M
...Membrane plate, T...Reinforcement, C...Concrete.

Claims (1)

[Scope of utility model registration request] The entire structure is block-shaped, with tapered sides that become narrower in the vertical direction, and the upper and lower surfaces are inclined to each other, with grooves for placing reinforcing bars formed along the inclination direction on the upper or lower surface. A spacer for reinforced concrete construction.