JPS6032249Y2 - Embedment material for concrete slabs - Google Patents

Description

[Detailed explanation of the invention] This invention is related to the embedded material used in the construction of concrete slabs, and it does not impair load-bearing performance even if the amount of material used is reduced, and it also has excellent soundproofing and vibration-proofing effects. I'm trying to get .

The embedded materials traditionally used in the construction of concrete slabs, which are used as flooring and ceiling materials in buildings, include:
Various types have been proposed, with typical examples being those made of iron plate and cardboard impregnated with paraffin.

However, if the thickness of the iron plate is increased to maintain strength, it will become very heavy, and if ribs are added to ensure load-bearing capacity, the workability of the manufacturing process will be extremely poor. However, if it is made of cardboard, it has low strength and is susceptible to water.

Therefore, this invention was designed to eliminate the drawbacks and inconveniences of the conventional technology, and its structure is that at least one side of the upper and lower sides of the embedding material body, which is made of a hard foam molded product of synthetic resin, is made of soft foam made of synthetic resin. It is characterized by being covered with a sheet.

Next, embodiments of this invention will be illustrated below with reference to the drawings.

Reference numeral 1 denotes the embedding material body, which is made of a hard foam molded product of synthetic resin, for example, foamed polystyrene.

Reference numeral 2 denotes a plurality of recesses formed on the back surface of the embedding material body 1, which are formed without penetrating the surface, and whose opening ends are sized to withstand pressure when stepped on by a worker. It is formed.

Further, the upper part 3 located at the back of the recessed part 2 is formed into an arc shape, so that the load resistance is not easily impaired.

Reference numeral 4 designates cutout steps for inserting the locking tool, which are formed at multiple locations around the embedding material body 1, and in consideration of usage, the upper side is wide cut out. The wall thickness is increased at the location where the cutout step portion 4 is formed, thereby preventing the wall thickness from decreasing due to the formation of the cutout step portion 4.

Reference numeral 5 in the figure indicates an example of a head-mounted fixing fitting used as a locking tool.

Next, reference numeral 10 denotes a soft foamed sheet of synthetic resin that covers at least one of the upper and lower sides of the embedding material body 1, such as the top surface, and it is sufficient to cover the embedding material body 1 before and after installation, such as polyolefin. A foamed polyethylene sheet or the like is suitable, but other flexible foamed sheets (foamed polypropylene sheet, etc.) can also be used, and adhesive or other attachment means can be used.

Examples of covering the soft foam sheet 10 include cases in which only the top surface of the embedding material body 1 is covered (see FIGS. 1 to 4), cases in which the top surface and side surfaces are covered (see FIG. 5), or When covering only the bottom surface or the bottom surface and other surfaces (not shown),
Furthermore, the case where the entire implant body 1 is covered (see FIG. 6) can be enumerated.

This device is constructed as described above, and one example of its use is to insert the embedding material body 1 made of a hard foam molded product during the curing process when the foundation, that is, the concrete substrate C that will become the bottom side of the slab, has not yet solidified. It is arranged with the concave portion 2 side facing downward so that at least one of the upper and lower sides is covered with the soft foam sheet 10.

Fixing at the time of arrangement may be carried out by inserting the fixing metal fitting 5 from the position of the cutout stepped portion 4, or fixing may be performed without using the fixing metal fitting 5 with the aid of adhesive or the like.

Next, by solidifying the concrete substrate C, the embedded material body 1 with the soft foam sheet 10 is attached to the concrete slab substrate C.
After attaching and fixing, a concrete slab can be obtained by pouring and integrating concrete C' which will become the upper part of the slab (for example, see FIG. 7).

Note that, before pouring the upper concrete C', reinforcements 30, 30', and 30' are normally placed as appropriate depending on the design conditions.

Furthermore, the embedding material main body 1 with the soft foam sheet 10 is not only fixed and fixed to the concrete substrate C cast by on-site construction as described above, but also by factory production.

That is, in this case as well, if the embedding material 1 with the soft foam sheet 10 is placed during the curing process when the poured concrete has not yet solidified and is made into a unit, it is possible to provide it in factory production. be.

As mentioned above, the embedding material of this invention is made of a hard foam molded synthetic resin material and at least one side of the top and bottom is covered with a soft foam sheet of synthetic resin, so it can be used in concrete slab construction. In this case, the soft foam sheet can increase the shock absorption from the outside, and the impact pressure can be dispersed in the body of the embedding material, making it a good embedding material with double impact resistance. The soft foam sheet is highly effective in soundproofing and vibrationproofing, and can be used as an embedded material in concrete slabs, which are used as various building materials.

In addition, by forming multiple recesses on the back side of the embedding material that do not penetrate to the surface, it is possible to significantly save material compared to solid material, making it more economical and stable with less lifting. At the same time, even if sparks fly during welding of reinforcing bars, etc. after placing the embedded material, when the above-mentioned recesses are present, it becomes easier for sparks to penetrate, eliminating the risk of being trapped inside and causing a fire. be done.

In addition, in practice, if the size of the recess is made so that it can withstand the pressure that a worker steps on, it will be able to withstand the load sufficiently even if the worker steps on it during construction, and the worker's foot will sink into the through hole. There will be no more irritation.

Furthermore, as the main body of the embedding material is made of a foamed molded product as mentioned above, this design is very convenient because it can be easily installed by just partially cutting out piping such as electric conduit pipes and gas pipes. It is something.

As mentioned above, this invention is easy to handle as an embedding material used in the construction of concrete slabs, and can exhibit various excellent effects.

[Brief explanation of drawings]

The figures illustrate the embodiment of this invention, and Fig. 1 is a partially cutaway perspective view, Fig. 2 is a plan view, Fig. 3 is a sectional view taken along the previous line ■-■, and Fig. 4 is a partially cutaway perspective view. 5 and 6 are cross-sectional views of modified examples, and Figure 7 is a concrete slab constructed by pouring concrete on the upper side of the structure shown in Figure 5. It is a sectional view showing a state. 1... Embedded material body, 2... Concave portion, 1
0... Soft foam sheet, C9C'...
·concrete.

Claims (1)

[Claims for Utility Model Registration] 1. An embedding material for a concrete slab, characterized in that the embedding material body is made of a hard foam molded product of synthetic resin, and at least one upper and lower side of the embedding material is covered with a soft foam sheet of synthetic resin. . 2. Claim 1 of the above-mentioned utility model registration, in which a plurality of recesses that do not penetrate to the surface are formed on the back surface of the embedding material main body.
Embedment material for concrete slabs as described in section. 3. The concrete slab embedding material according to claim 1 of the above-mentioned utility model registration claim, wherein cutout steps are formed at a plurality of locations around the embedding material body for piercing the anchor. 4. The concrete slab embedding material described in claim 1 of the above-mentioned utility model registration claim, wherein the embedding material body is formed of a foam molded product made of polystyrene, and the soft foam sheet covering this is formed of a foamed sheet made of polyethylene. Inclusion material.