JPH094192A - Concrete form material for floating floor - Google Patents

Abstract

PURPOSE: To suppress costs and establish a lightweight construction by reducing man-hours for manufacturing a concrete form material for a floating floor and also the number of component parts. CONSTITUTION: A concrete form material 1 for a floating floor has a form part 2, which expands in horizontal directions and in which concrete and other hardening material are placed, and supporting legs 4 which are installed on the form part 2 protrusively downward and supports it on a foundation floor afloat, wherein the whole construction is embodies as a single piece from a synthetic resin with independent bubbles turned into inside form molded foaming body owing to foaming beads. At least a supporting part 4a of each leg 4 contacting with a foundation floor should be embodied a greater foaming rate than the other parts including the form part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork material for a floating floor which constitutes a floor of a predetermined height on a foundation floor. The present invention relates to a form material that can be used for wiring.

[0002]

2. Description of the Related Art As a conventional floating floor frame material, there is an invention described in Japanese Patent Application Laid-Open No. 4-85452 in which the present applicant is a joint applicant. That is, a conventional floating floor form material is a form part that has a horizontal expanse and in which concrete or other curable material is placed, and is integrally and downwardly projected from the form part. A support leg that is hollow and has an inverted truncated cone shape that floats and supports the mold part on the foundation floor as a support portion of the support leg that is in contact with the foundation floor. A cushioning material separate from the part is fixedly provided. The bottom of the mold part and the upper end of the inverted frustoconical support leg part are continuous with each other, and the inside of the mold part and the inside of the support leg part are communicated with each other, and the inside of these is filled with the curable material. It is supposed to be done. Although the supporting leg portion excluding the supporting portion and the mold frame portion are not described in the publication, the applicant of the present invention molded the conventional mold material with a synthetic resin plate.

[0003]

However, in the conventional mold material formed by a synthetic resin plate, the supporting portion of the supporting leg portion is separate from the other portions of the supporting leg portion, and the supporting portion is not supported. Since the part is fixed to the other part, it is difficult to meet the demand for cost reduction. In addition, since the molded product made of the synthetic resin plate has a relatively large weight, the transportability and workability are not sufficient.

Therefore, an object of the present invention is to obtain a formwork material for a floating floor, which can reduce the number of manufacturing steps and the number of parts to reduce the cost and the weight.

[0005]

DISCLOSURE OF THE INVENTION A mold material for a floating floor according to the present invention is a mold part having a horizontal expanse and in which concrete or other hardening material is cast, and the mold part. Is a form material for a floating floor, which has a support leg portion that projects downward from the base portion and floats and supports the form portion on a foundation floor. The support leg portion is integrally molded with foamed synthetic resin as a whole. In at least the supporting part in contact with the base floor, the foaming rate was made larger than that of other parts including the mold part.

[0006] This floating floor frame material is preferably integrally molded as an in-mold molded foam body of foam beads, and each cell is preferably an independent cell.

[0007]

[Function] Since the whole is molded from foamed synthetic resin, it is lightweight, easy to transport, and has good workability on floating floors. In addition, at least the portion of the supporting legs that is in contact with the foundation floor has a foaming rate higher than other parts. Since it is large, it has high shock absorption,
Therefore, the propagation of floor impact sound can be effectively prevented. Also in manufacturing, the mold frame material can be molded by a process of only foam molding in the mold.

Further, since the whole mold material is integrally molded as an in-mold molding foamed body of foam beads and each cell is independent, it is excellent in cushioning resistance and shape restoring property, and the foaming rate is adjusted. By doing so, the compressive strength can be adjusted.

[0009]

1 is a plan view of a floating floor formwork 1, and FIG. 2 is a cross-sectional view taken along the line-. The floating floor frame material 1 is integrally formed of foamed polypropylene resin as a whole, but it has a horizontal shape and a mold portion 2 into which concrete or other curable material is cast. , And a support leg portion 4 that projects downward from the mold portion 2 and supports the mold portion 2 on the foundation floor 3 in a floating manner.

The mold part 2 is in the form of a flat rectangular tray which is composed of a flat plate part 2a which is roughly horizontal and an edge part 2b which is higher by about 10 mm around the flat plate part 2a. In this embodiment, one side is about 500 mm in the plane. Form a square. An inverted frustoconical support leg portion 4 is integrally formed on the flat plate portion 2a of the frame portion 2, and a hole is formed in the flat plate portion 2a at the support leg portion 4 so that the flat plate portion 2a has a hole. The upper surface communicates with the inside of the support leg portion 4. The height of the floating floor formwork 1 is about 70 mm.

Of the supporting legs 4, the supporting part 4a which is in contact with the foundation floor 3 has a flat circular shape having an outer diameter of about 80 mm and a thickness of about 20 mm, and other parts, that is, the mold part 2 and the supporting leg 4
The foaming rate is higher than that of the portion excluding the support portion 4a. That is, the supporting portion 4a has a foaming rate of 30%.
In addition, the foaming rate of other parts is set to 15%. Needless to say, the numerical value of the foaming rate differs depending on the material of the floating floor frame material 1 and the conditions such as the thickness dimension, but the foaming rate of the support portion 4a should be higher than the foaming rates of other parts. The conditions do not change.

Further, the floating floor mold material 1 is integrally molded as an in-mold foam body made of foam beads and each cell is independent. Therefore, it is excellent in cushioning resistance and shape restoring property, and in particular, the compressive strength can be adjusted by adjusting the foaming rate of the supporting portion 4a. The flat plate portion 2a and the portion of the supporting leg portion 4 excluding the supporting portion have a thickness of about 13 mm. Further, the above-mentioned material of the floating floor frame material 1 is excellent in chemical resistance, oil resistance, heat shrinkage, and heat resistance and has high elasticity, but it may be different depending on the use of the room in which the floating floor frame material 1 is used. It is also possible to use the above synthetic resin, and the dimensions of the respective portions of the floating floor frame material 1 may be other dimensions depending on conditions such as workability and transportability. Further, the number of support legs 4 with respect to the mold part 2 and the size of the support legs 4 are not limited to the above-described form.

[0013]

EXAMPLE FIG. 3 is a vertical cross-sectional view showing a first example in which a floating floor frame material 1 is used. A plurality of cushioning materials 6 are provided between a floor frame 5 and a plurality of base floors 3. The floating floor formwork materials 1 are laid side by side, and the mesh reinforcements 7 are placed on the floating floor formwork material 1 so that the mesh reinforcements 7 are supported by the edges 2b of the floating floor formwork material 1. . Thus, the height dimension of the edge portion 2a of the mold frame portion 2 secures the fogging of the mortar on the mesh streaks 7. Mortar 8 up to the height of the floor frame 5
(Ordinary mortar) is placed and cured. In this example, the distance from the upper surface of the foundation floor 3 to the upper surface of the mortar 8 is about 100 mm. Instead of the mortar 8, it is possible to use other curable materials such as gypsum and concrete.

FIG. 4 is a vertical cross-sectional view showing a second embodiment, which is the same as that of FIG. 3 until the mesh streaks 7 and the mortar 8 are set and hardened, but here, the acrylic resin is applied to the upper surface of the mortar 8. The polymer cement mortar 9 is comb-coated with a thickness of about 3 mm and a flooring material 10 with a thickness of about 12 mm is applied. FIG. 5 is a vertical cross-sectional view showing a third embodiment, in which a polypropylene sheet having a thickness of about 4 mm and an acrylic polymer cement mortar are placed between the acrylic polymer cement mortar 9 and the flooring material 10 shown in FIG. Is an example of construction with the bottom.

FIG. 6 is a longitudinal sectional view showing a fourth embodiment, which is the same as that of FIG. 3 until the mesh streaks 7 and the mortar 8 are set and hardened, but extrusion foaming is performed on the mortar 8. This is an example in which a straw floor tatami mat 11 containing a polystyrene board (trade name "Shiroro Board") is laid to form a floor for a Japanese-style room. In FIGS. 3 to 6, reference numeral 12 denotes piping and wiring, which are arranged by utilizing the space formed on the foundation floor 3 by the support leg portions 4.

Next, the first to fourth parts shown in FIGS.
The results of comparing the floor impact sound levels of the example and the case of only the basic floor 3 will be described. As shown in FIG. 7, the floor impact sound level is measured by installing a precision sound level meter 14 in a sound receiving room 13 which is formed like a single room in an apartment house by enclosing six sides of up, down, front, back, left and right with reinforced concrete. The ceiling board is the basic floor 3. Each of the floors shown in FIGS. 3 to 6 is constructed on the foundation floor 3, and a shock is applied to the floors by the tapping machine 15 as a lightweight impact source and the bang machine 16 as a heavy impact source. Octave band center frequency with the precision sound level meter 14
The results of measuring the relationship between (Hz) and the average floor impact sound level (dB) are shown in FIGS. 8 and 9.

FIG. 8 shows data when a shock is applied by the lightweight shock source, and FIG. 9 shows data when a shock is applied by the heavy shock source. In these figures, the line connected with a circle is the measured value when only the foundation floor 3 is used without using the floating floor formwork material 1, and the line connected with a triangle is the first line in FIG.
In the case of the embodiment, the line connected by the ∇ mark is the case of the second embodiment of FIG. 4, and the line connected by the □ is the case of the third embodiment of FIG.
The lines connected by marks show the respective measured values in the case of the fourth embodiment of FIG.

As shown in FIGS. 8 and 9, when a floating floor is formed by using the floating floor formwork 1, the support legs 4 are in contact with at least the foundation floor 3. It has been found that the portion 4a has a higher foaming rate than the other portions, so that the sound absorbing rate is high and therefore the propagation of the floor impact sound can be effectively prevented. Moreover, since the whole is molded with foamed synthetic resin, it is lightweight and easy to transport, and the workability of the floating floor is also good, and at the time of manufacturing, the foaming frame material for the floating floor is formed by just foam-molding in the mold. 1 has the advantage that it can be molded.

[0019]

As described above, according to the first aspect of the present invention, since the whole is molded of the foamed synthetic resin, the weight is reduced, the transportation is easy, and the workability of the floating floor is good.
Further, since the foaming rate of at least the portion of the support leg that is in contact with the base floor is higher than that of the other portions, the impact absorption is high, and therefore the propagation of the floor impact sound can be effectively prevented. Further, also in the manufacturing process, the mold frame material can be molded only by the foam molding in the mold.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the entire mold material is integrally molded as an in-mold foamed body of foam beads and each bubble is independent. Therefore, there is an effect that it is excellent in cushioning resistance and shape restoring property, and that the compression strength can be adjusted by adjusting the foaming rate.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line − in FIG.

FIG. 3 is a vertical sectional view showing the first embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 5 is a vertical sectional view showing a third embodiment of the present invention.

FIG. 6 is a vertical sectional view showing a fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram of a state where a floor impact sound level is measured.

FIG. 8 is a graph showing the floor impact sound level by the lightweight impact source of each example.

FIG. 9 is a graph showing the floor impact sound level according to the heavy impact source of each example.

[Explanation of symbols]

 1 Formwork material for floating floor 2 Formwork part 2a Flat plate part 2b Edge part 3 Foundation floor 4 Support leg part 4a Support part 8 Mortar

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Haruo Sasaki 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (2)

[Claims] 1. A form part having a horizontal expanse in which concrete or other hardening material is placed, and a form part projecting downward from the form part to form the form part on a foundation floor. In a floating floor form material having support legs that are floated and supported, the whole is integrally molded of foamed synthetic resin, and the support portions of the support legs that are in contact with at least the base floor include the form portion. A mold material for a floating floor, which is formed so as to have a higher foaming rate than other parts. 2. The mold material for a floating floor according to claim 1, wherein the whole is integrally molded as an in-mold molded foam made of foam beads and each cell is an independent cell.