JPH10169164A - Double floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the comfortableness of an underfloor ventilation type air conditioning and a lightweight floor's impulsive sound isolating performance by laying a cushioning material between a specified heat insulating material and a support, and placing a backing panel through the support. SOLUTION: A heat insulating material 6 whose compression strength is 1 to 6kg/cm<2> and thickness is 20 to 100mm, is laid on the ground under the floor. And then a plurality of supports 1 whose rate of contact with the heat- insulating material 6 is 10 to 40%, are arranged thereon at a prescribed interval. In addition, a cushioning material 5 whose static spring constant is 0.5×10<6> to 9×10<6> N/m<3> , is laid between the heat insulating material 6 and a base plate under the support. And then a backing panel 8 is placed through the support 1 and finished with flooring 9, the sum of thermal resistance of the backing panel 8 and the flooring 9 may be 0.3m<2> h deg.C/kcal or less. Therefor, the comfortableness of the underfloor ventilation type air conditioning can be improved, and a lightweight floor's impulsive sound isolating performance can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underfloor ventilation type air-conditioning floor structure capable of comfortable floor heating in a multi-family house, an office, a store and a school, and an excellent floor impact sound insulation performance (light weight) downstairs. The present invention relates to a double floor structure having a combined floor structure.

[0002]

2. Description of the Related Art In apartment houses, offices, etc., a double floor is often used for wiring and piping under the floor, and at the same time, a rubber-based material is used for supporting legs and the like to provide a certain soundproof measure. In the case of flooring finishing, a method of reducing the transmission of floor impact sound by attaching a cushioning material to the back surface of the finishing material has been used. Examples of these are Shokai 63
No. 91645 or Japanese Utility Model Application Laid-Open No. 63-119740. On the other hand, in order to obtain a comfortable thermal environment, the double floor tunnel is used as an air chamber, and air controlled at a certain temperature is sent into this air chamber,
A method of passing air, cooling or heating from the floor, and refluxing indoors is used. This method is referred to as underfloor air-conditioning air-conditioning, for example, as disclosed in Japanese Utility Model Laid-Open No.
See -41918. However, there has not yet been proposed a method of combining the above two technologies and simultaneously achieving the floor impact sound reduction and the underfloor and ventilation air conditioning in a double floor structure.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a double floor structure capable of reducing the floor impact sound and performing under-floor air-conditioning, which cannot be combined with the prior art. It is a suggestion.

[0004] floor impact sound measures of the prior art, legs and the bottom surface and the material of the rubber of a small area of 10 to 15 cm ^2, flooring, etc. The thickness 4 in expansion ratio 30-60 times on the back surface A cushion material (cushion material) of about 6 mm is often used. On the other hand, the floor structure of the underfloor air-conditioning air conditioner of the prior art is constructed by laying a heat insulating material on a concrete slab, arranging a supporting leg directly on the concrete slab, placing a concrete panel on the supporting leg, and finishing as appropriate. There were many things. Underfloor air-conditioning is characterized by the fact that heat is transmitted to the floor by heat conduction by air passing under the floor, and is transmitted to the room by radiation, conduction, and convection through the finishing material of the floor, and the heat conduction of the floor is poor. And a comfortable thermal environment cannot be obtained. When trying to apply the floor structure of the prior art that responds to floor impact noise to underfloor air-conditioning air conditioning, it is necessary to mount the supporting legs directly on a concrete slab or the like because the bottom surface of the legs is small. In order to avoid the bridge, it was necessary to lay the heat insulating material with trouble. Further, when the conventional soundproof flooring is used as a finishing material, there is a problem that heat conduction from under the floor is poor due to high thermal resistance, and it is difficult for the floor temperature to be proper. In addition, the underfloor air-conditioning air conditioners of the prior art have not studied the thermal resistance of the floor portion and the like, and there are many inappropriate floor structures. In the present invention, in order to study the thermal resistance of the floor where a comfortable thermal environment can be obtained in the underfloor air-conditioning type air conditioner, support legs and cushioning materials are required to make the floor structure excellent in floor impact sound insulation performance (light weight). The purpose of this study is to obtain a double floor structure that can achieve both of them at the same time.

[0005]

The object of the present invention is to provide a method for compressing concrete on a floor base made of concrete slab or the like with a compressive strength of 1 to 6 kg / c.
m ² , a heat insulating material having a thickness of 20 to 100 mm is laid, and a plurality of support legs having a contact ratio with the heat insulating material of 10 to 40% are arranged at predetermined intervals on the heat insulating material. Static spring constant 0.5 × 10 ^{6 to} 9 × 10 between the heat insulating material and the support leg lower base plate
A cushioning material of ⁶ N / m ³ is laid, and a base panel is placed via the support legs and finished with a finishing material. The sum of the thermal resistances of both the base panel and the finishing material is 0.3 m ^2. h ° C / kcal
It is solved by the following double floor structure.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Compressive strength according to the present invention 1-6k
The heat insulating material having a thickness of ²⁰ g / cm ² and a thickness of 20 to 100 mm plays a role in reducing the heat loss from the concrete slab and reducing the floor impact sound (light weight) by mounting the supporting legs on the heat insulating material. Examples thereof include extruded polystyrene foam, rigid urethane foam, and phenol foam. The reason for setting the compressive strength to 1 to 6 kg / cm ² is to stably load the support legs and to cushion floor impact noise. When the compressive strength is 1 kg / cm ² or less, it cannot withstand the load from the support legs, and when the compressive strength is 6 kg / cm ² or more, the rigidity increases and the floor impact noise (light weight) blocking effect decreases. The reason for the thickness of 20 to 100 mm is that when the thickness is 20 mm or less, the heat insulating effect is reduced, and when the thickness is 100 mm or more, the economic efficiency is deteriorated.

The supporting leg according to the present invention is a known supporting column comprising a supporting column and a supporting leg upper and lower base plate, the height of which is adjustable. The material of the support leg upper and lower base plates and the support portion may be made of wood or steel, but may be any material that can withstand the load from the floor. The contact ratio with the heat insulating material indicates the area of the lower base plate × the number × 100 / floor area, and each lower base plate is 25
They are arranged at intervals of 500 mm at about 0 to 1000 cm ² .
The contact ratio between the heat insulating material and the support leg lower base plate is 10 to 40%.
The reason for limiting the contact ratio to 10 to 40% is that if it is less than 10%, the load from the floor is concentrated and it cannot withstand, and the heat insulating material is likely to break down. If it exceeds 40%, the floor impact sound insulation performance ( (Lightweight). In particular, this phenomenon becomes remarkable when the cushioning material is laid between the lower base plate and the heat insulating material.

The cushioning material according to the present invention is laid between the heat insulating material and the support leg lower base plate with a fibrous nonwoven fabric such as polyester, polyethylene, vinylon and nylon, a foamed material such as polyethylene and urethane, and a composite material thereof. . The static spring constant of the cushioning material is 0.5 × 10 ^{6 to} 9 × 10 ⁶ N / m ³
The reason for this is that if it is less than 0.5 × 10 ⁶ N / m ³ , the floor is too soft and the sink of the floor is not stable. If it exceeds 9 × 10 ⁶ N / m ³ , it is too hard to easily transmit floor impact noise.

When floor heating is performed by underfloor air conditioning, a heat source such as a heat pump air conditioner which is generally used when the thermal resistance of the floor is 0.3 m ² h ° C./kcal or less,
This is preferable because the rise of the bed temperature is as quick as about 60 minutes, and it is easy to maintain and adjust the attained temperature. Therefore, the sum of the thermal resistances of the base panel and the finishing material according to the present invention is 0.3 m.
^{By controlling the} temperature to ² h ° C./kcal or less, comfortable floor heating becomes possible. The base panel used in the present invention is preferably a concrete plate, a calcical plate, or another inorganic material plate having a thermal resistance of 0.15 m ² h ° C./kcal or less. Particleboard plywood is not preferred because toxic gas such as formalin is easily generated during heating. The finish has a thermal resistance of 0.2 m ^2.
Flooring, carpet, vinyl sheet, stone, etc. of h ° C / kcal or less can be mentioned. Furthermore, the thermal conductivity of the finishing material is 0.2 kcal because it has a direct effect on humans.
/ Mh ° C or lower is preferred. This is because if the thermal conductivity is too high, the human touch feels too hot or too cold, which is uncomfortable. For the above reason, the sum of the thermal resistances of both is 0.3
It is important to determine a combination of the two so that m ² h ° C./kcal or less.

The floor structure of the present invention can be obtained by applying the above-mentioned components in the order of a heat insulating material, a cushioning material, a supporting leg, a base panel, and a finishing material, and fixing and bonding them by a known method. The distance between the heat insulating material and the base panel is 70 to
It is preferable to set the heat source and the reflux port at positions opposite to both sides of the room so that the width is about 150 mm and the hot or cold air spreads over the entire floor from the heat source.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 1 shows an RC slab 150 having an area of 10 m ² .
It is the schematic sectional drawing of the double floor structure of this invention constructed in mm. The heat source is a heat pump air conditioner, and the insulation is compressive strength 5
kg / cm ² extruded styrene foam board (50m thick
m), the cushioning material is a polyester-based nonwoven fabric (thickness: 10 mm) having a static spring constant of 2 × 10 ⁶ N / m ³ , and the supporting legs are columns (height: 10) that can be adjusted in height.
0 mm), the support leg upper base plate (100 mm x 100 mm x thickness 15 mm) and the support leg lower base plate (200 mm x 200 mm)
× thickness 21 mm), and the supporting legs are arranged on a heat insulating material at a pitch of 500 mm, and a base panel (thermal resistance: 0.11 m ² h ° C / kcal, thickness 25 m) is provided through the supporting legs.
m, inorganic panel with dimensions of 500 mm x 1000 mm)
Laying wood flooring (heat resistance: 0.12m ² h
C / kcal, thickness 12 mm). The sum of the thermal resistance of the base panel and the finish flooring is 0.23m ² h ° C
/ Kcal. FIG. 2 shows details of the portion A in FIG.

[Comparative Example 1] A base panel was made of a particle board (thermal resistance: 0.31 m ² h ° C / kcal, thickness: 30 m)
Comparative Example 1 was performed in the same manner as in Example 1 except that m) was used. The sum of the thermal resistances of the base panel and the finish flooring is 0.43 m ² h ° C./kcal.

Comparative Example 2 As shown in FIG. 3, a supporting leg was directly disposed on a concrete slab, and Comparative Example 2 was performed in the same manner as in Example 1 except that no cushioning material was used. FIG. 3 shows the details of the comparative part of Comparative Example 2.

[Test] The floor structures of Example 1 and Comparative Examples 1 and 2 were heated by blowing air under the floor to measure the indoor floor temperature and the light floor impact sound. FIG. 4 shows the floor surface of Example 1. A temperature rise diagram, FIG. 5 shows a floor surface temperature rise diagram of Comparative Example 1, and FIG. 6 shows a light floor impact sound measurement result.

[Measurement conditions] Heat pump air conditioner: MSZ-V226A manufactured by Mitsubishi Electric
Set temperature 22 ° C Floor surface temperature: Average value of five places on the floor surface Lightweight floor impact sound: JIS A 1418 According to the method of measuring the floor impact sound level at a building site. Compressive strength: JIS K 7220 Thermal resistance: JIS A 1420

[Consideration] As can be seen from a comparison between FIG. 4 and FIG. 5, the floor surface temperature of Example 1 becomes 25 ° C. in about 60 minutes.
It reaches the optimum 27 ° C. as the bed temperature and becomes parallel. In contrast, the floor surface temperature of Comparative Example 1 rises slowly and becomes parallel at 22 ° C. This temperature is too low for floor heating. In addition, in the JIS 1419 grade line for the light floor impact sound shown in FIG. 6, Example 1 shows a value exceeding LL-50 and Comparative Example 2 shows a value exceeding LL-65. Comparative Example 2 in which the double floor structure of the present invention is a conventional method. It is shown that the grade is improved by about 15 dB in comparison with the above.

[0017]

According to the double floor of the present invention, the comfort of under-floor air-conditioning is further improved by making the sum of the thermal resistances of both the base panel and the finishing material 0.3 m ² h ° C./kcal or less. Effect, and furthermore, compressive strength 1-6 kg / cm ² , thickness 20
Insulation material of ~ 100mm and static spring constant 0.5 × 10 ⁶
Up to 9 × 10 ⁶ N / m ³ of cushioning material and a plurality of supporting legs with a contact rate of 10 to 40% between the heat insulating material and the supporting leg lower base plate can be combined to improve the effect of lightweight floor impact sound insulation performance improvement. At the same time, it is possible to achieve this, and it is also economically advantageous.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a double floor structure of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is an enlarged view of a portion corresponding to a portion A in FIG. 1 of Comparative Example 2.

FIG. 4 is a diagram showing a temperature rise of a floor surface in Example 1.

FIG. 5 is a diagram showing a rise in floor surface temperature in Comparative Example 1.

FIG. 6 is a graph showing light floor impact sound measurement results of Example 1 and Comparative Example 2.

[Description of Signs] 1 support leg 2 support leg upper base plate 3 support leg lower base plate 4 column 5 cushioning material 6 heat insulating material 7 concrete slab 8 base panel 9 flooring 10 heat pump air conditioner (indoor unit) 11 heat pump air conditioner (outdoor unit) 12 Window 13 Grating (return port) 14 Tunnel 15 Heat pump air conditioner pipe

Claims (1)

[Claims] 1. A compressive strength of 1 to 6 kg / cm ² and a thickness of 20 to 100 m on a floor substrate made of a concrete slab or the like.
m, and a plurality of support legs having a contact rate of 10 to 40% between the heat insulator and the support leg lower base plate are arranged on the heat insulator at predetermined intervals. A cushioning material having a static spring constant of 0.5 × 10 ^{6 to} 9 × 10 ⁶ N / m ³ is laid between the support leg lower base plate and a base panel is placed via the support leg, and a finishing material is provided. Double floor structure in which the sum of the thermal resistances of both the base panel and the finishing material is 0.3 m ² h ° C / kcal or less