JP2008231834A - Structure of chemical substance diffusion suppressing multiple dwelling house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a chemical substance diffusion suppressing multiple dwelling house of a floor structure satisfying floor impulsive sound cutoff performance, by constituting a structural material of the ceiling, a wall and a floor in a room out of a raw material having no diffusion of a chemical substance. <P>SOLUTION: Plaster 41 is used for surface finishing of the wall and the ceiling, and a finishing material of a dry double floor 10 is used for solid flooring 1, and a backing material uses a backing panel 2 composed of cement and wooden chips, to suppress diffusion of the chemical substance in the room. The floor structure is composed of an unevenness adjusting member 20 having a wooden floor joint 4 and a vibration control rubber leg part 5 supporting this floor joist as a floor impulsive sound cutoff structure. The dry double floor 10 is characterized in that a clearance 3 is arranged by separating by a specific dimension from a wall surface, and air in the room is sucked in under the floor from its clearance 3, and is exhausted outdoors by an always operating ventilator 6 arranged on an underfloor wall surface, and thereby, the chemical substance diffused from the vibration control rubber leg part 5 is not diffused in the room. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a chemical substance emission preventing structure of an apartment house that satisfies floor impact sound insulation performance, and more particularly to a floor structure that enables a reduction structure of chemical emission and discharge of chemical substances.

  According to an estimate from the National Public Health Institute in July 2000, there are about 700,000 people who are suspected of having chemical hypersensitivity in the whole country, and there are nearly 1 million people including minors. May be chemical hypersensitivity. On the other hand, according to the results of a study by the Architectural Institute of Japan, Indoor Chemicals Air Pollution Research Group, 5-6% of Japanese people are highly likely to have sick house syndrome.

  In addition, due to the recent health orientation and slow life orientation, there is a need for “a living space where people can live healthier”.

  Conventional materials used in condominium rooms have been made of chemical substances such as vinyl cloth, urethane foam insulation, organic paint, and organic adhesives. In particular, the proportion of chemical substances used was large for flooring with a large area in the house.

  The major role of flooring materials in apartment buildings was to reduce floor impact noise associated with walking and the like. In order to realize this in the conventional floor, a vibration damping material made of an organic compound for buffering an impact or a particle board formed by molding wood fiber with an organic adhesive as a binder has been used. Chemicals released from these materials were one of the causes of sick house syndrome.

  FIG. 6 is a cross-sectional view showing a configuration of a conventional dry double floor 10. Since the floor base material 12 is usually a particle board and the floor finishing material 11 is made of plywood flooring, it is not possible to avoid indoor diffusion of chemical substances from those materials and adhesives.

  Further, an uneven surface adjusting member 20 is used between the concrete slab 30 and the floor base material 12 and provided with a vibration-proof rubber leg 5 for blocking floor impact sound. There is a problem in that the chemical substances cannot be prevented from being emitted from the section 5, and the chemical substances are accumulated in the space under the floor and leak into the room through the gaps.

  Patent Document 1 discloses a ventilation in which outside air is forcibly supplied from the upper part of a concrete apartment or the like, and forced exhaust is performed in the lower part in order to overcome such chemical sensitivity, sick house syndrome, oxygen deficiency, and moisture damage. It is a structure invention. However, it was difficult to prevent the sick house syndrome even if it was possible to reduce sick house syndrome only by increasing the ventilation frequency.

  Further, according to the soundproof underfloor structure of Patent Document 2, an invention is disclosed in which a rubber with a non-land adjustment bolt is used to set the resonance frequency with the face material to 30 Hz or less and to prevent the weight shock from being transmitted downstairs due to the vibration isolation effect due to the resonance. Has been. However, there is a problem that the chemical substances emitted from the particle board of the floor base material and the plywood of the surface finish material and the chemical substances emitted from the rubber provided on the lower surface of the uneven adjustment bolt flow into the room. It was.

Japanese Patent Laid-Open No. 2002-98380 (pages 2, 3 and 1) Japanese Patent Laid-Open No. 7-150740 (pages 2, 3 and 2)

  It is an object to provide a structure of an apartment house with a chemical structure that suppresses the release of chemical substances, and that satisfies the floor impact sound insulation performance, while the indoor ceiling, wall, and floor structural materials are made of materials that do not emit chemical substances. To do.

In order to solve the above-mentioned problem, the structure of the chemical substance emission suppression apartment house of the present invention is an apartment house structure, and the room is normally supplemented with fresh air by ventilation, and at least the heat insulating material of the concrete frame is carbonized cork, The surface finish of the wall and ceiling is plaster, the flooring material of the dry double floor is solid flooring, and the base material uses a base panel made of cement and wood pieces to suppress the emission of chemical substances into the room, and the floor structure is It is composed of a wooden joist as a floor impact sound insulation structure and a non-land adjustment member having an anti-vibration rubber leg that supports it,
The dry double floor is provided with an underfloor vent that penetrates under the floor in a gap spaced apart from the wall surface by a certain distance or near the wall surface, and the indoor air is sucked under the floor from the gap or underfloor vent and is provided on the underfloor wall surface. In addition, it is characterized in that the chemical substance diffused from the vibration-proof rubber legs is not diffused indoors by being discharged outdoors by a ventilation device that is always operated.

  According to the present invention, since the floor material that has been known to release chemical substances in the past is made of a material that hardly emits chemical substances, chemical sensitivity and sick house syndrome can be prevented. In addition, since a gap between the double floor and the wall or an underfloor vent is provided, and indoor air is always sucked under the floor, chemical substances from rubber used for the floor unevenness adjustment member are exhausted by the underfloor exhaust device. It is discharged to the outside and chemical substances do not leak into the room.

  Further, by using plaster for the surface finishing of the carbonized cork, walls, and ceiling for the heat insulating material of the concrete frame, it is possible to eliminate chemical substance diffusion from the material other than the floor into the room.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a dry double floor of the structure of a chemical substance emission suppression apartment house according to the present invention.

  In FIG. 1, 30 is a concrete slab of the floor of an apartment house, and 40 is a concrete wall. The dry double floor 10 of the present invention has a structure in which an underfloor vent that penetrates under the floor is provided in the vicinity of the gap 3 or the wall surface at a certain distance at the boundary with the wall 40, and indoor air is sucked under the floor.

  In this sectional view, a gap is provided between the double floor and the wall. The wall 40 is finished with plaster 41.

  For the floor base, a base panel 2 made of cement and wood pieces that does not emit chemical substances is used, and the solid flooring 1 that does not release chemical substances is also used as the finishing material.

  Furthermore, in order to support the base panel 2 of the floor base and to secure the floor cross section rigidity, the wooden joists are arranged with @ 455, and the lower part thereof is supported by the unevenness adjusting member 20 provided with the anti-vibration rubber legs 5. To do.

  The non-land adjustment member 20 has a structure in which the natural frequency of the floor finishing structure is made sufficiently smaller than the evaluation frequency of the floor impact sound cutoff performance, and the floor support leg includes the vibration-proof rubber legs 5. A wooden joist bracket that can be adjusted in height is used for uneven adjustment, but the structure shown in Patent Document 2 and other known structures can be used.

  In apartment buildings, floor impact sound insulation is a very important performance, but in order to satisfy this, the vibration-proof rubber legs 5 that inevitably prevent the release of chemical substances must be used.

  The present invention is characterized by having a structure for discharging the chemical substances from the vibration-proof rubber legs 5 to the outside without being diffused into the room.

  FIG. 2 is an explanatory view of the emission chemical substance discharge structure under the floor of the present invention. As shown in FIG. 2, in the apartment house of the present invention, the air inlet 7 is provided in the ceiling in the room 50, and the ventilator 6 is provided on the underfloor wall surface of the double floor so that exhaust is always performed from under the floor.

  For this reason, the underfloor pressure is negative with respect to the room, and the air in the room is sucked under the floor 3 through a gap 3 or a floor vent (not shown) penetrating under the wall near the wall surface. The chemical substance released from the vibration rubber leg 5 is discharged outdoors.

  In FIG. 2, fresh intake air A sucked from the air inlet 7 is sucked into the floor under the floor as exhaust B <b> 1 and discharged to the outside as exhaust B by the ventilation device 6.

  In addition, although it exhausts also with the ventilating fan 8 of an indoor ceiling or a kitchen, a bathroom etc. as indoor ventilation, the underfloor ventilator 6 is always operated and the underfloor is made into negative pressure from indoor pressure.

  FIG. 3 is a plan view showing an embodiment of the apartment house according to the present invention.

  In FIG. 3, a gap 3 is provided between the left and right walls 40 and the floor 10, and a ventilation device 6 is provided on the floor under the boundary between the veranda side and the outside on the passage side.

  FIG. 4 shows the results of measuring the indoor and underfloor chemical removal performance in the floor structure and underfloor ventilation of the present invention. The illustrated graph is one of the measurement results, the measurement result of the acetaldehyde concentration one day after the construction and seven days after the underfloor ventilation is activated. In the measurement, the laboratory windows and doors were closed, and the air was moved only by underfloor ventilation.

  As can be seen in the figure, the release of chemical substances by the anti-vibration rubber legs and the caulking material that adheres them to the floor slab was confirmed immediately after the construction. Confirmed to be back to

  FIG. 5 is a diagram showing the measurement result of the floor impact sound level of the floor impact sound blocking structure of the present invention.

  The experimental floor is designed to have a natural frequency of 35 Hz for the floor, and, like the wall gap of the present invention, a clearance is provided as in the present invention without using a joist, thereby eliminating vibration propagation from other than the legs. Furthermore, air layer resonance at the time of weight impact was eliminated. In addition, a high-pressure wood wool cement board (1820 × 910 × 20) was used as the base panel 2, the finishing material was solid flooring 1 (750 × 90 × 18), and the joist was 72 * 36 @ 455.

  The vertical axis of the graph of FIG. 5 indicates the normalized floor impact sound level (dB), and the horizontal axis indicates the center frequency (Hz). The black circle indicates the measured weight impact of the experimental floor, the white circle indicates the measured light impact of the experimental floor, and the black and white triangles indicate the measured values on the bare surface.

  From the graph, the floor impact sound blocking structure of the present invention is a lightweight floor impact sound L-45 (Class 1 recommended by Architectural Institute of Japan) without significantly degrading the performance of the slab alone (L-55) even with a double floor. Was almost satisfied.

  It should be noted that higher performance requirements for lightweight floor impact sounds can be addressed by inserting a cushioning material (no chemical material such as coconut fiber) between the solid flooring 1 and the base panel 2. it can.

  From the above experiment, according to the structure of the present invention, it is possible to solve the problem of preventing the onset of chemical hypersensitivity and sick house syndrome while satisfying the soundproof performance as an apartment house.

It is sectional drawing which shows the dry-type double floor of the structure of the chemical substance emission suppression apartment house of this invention. It is explanatory drawing of the emission chemical substance discharge structure under the floor of this invention. It is a top view which shows the Example in the apartment house of this invention. It is a figure which shows the measurement result about the removal performance of the indoor and underfloor chemical substance in the floor structure and underfloor ventilation of this invention. It is a figure which shows the measurement result of the floor impact sound level of the floor impact sound interruption | blocking structure of this invention. It is sectional drawing which shows the structure of the conventional dry type double bed.

Explanation of symbols

1 Solid wood flooring 2 Base panel 3 Gap (underfloor vent)
4 Wooden joists 5 Anti-vibration rubber feet 6 Ventilator 7 Air intake 8 Ventilation port 10 Dry double floor 11 Floor finish (plywood flooring)
12 Floor base material (particle board)
20 Unevenness adjustment member 30 Concrete slab 40 Wall 50 Indoor A Intake B, B1 Exhaust

Claims (1)

It is a multi-family housing structure, and the room is usually replenished with fresh air by ventilation, at least carbonized cork for the insulation of the concrete frame, plaster for the surface finish of the walls and ceiling, solid flooring for the dry double floor finish The base material uses a base panel made of cement and wood to suppress the release of chemicals into the room, and the floor structure has wooden joists and vibration-proof rubber legs that support it as a floor impact sound insulation structure Consists of non-land adjustment members,
The dry double floor is provided with an underfloor vent that penetrates under the floor in a gap spaced apart from the wall surface by a certain distance or near the wall surface, and the indoor air is sucked under the floor from the gap or underfloor vent and is provided on the underfloor wall surface. A structure of a chemical substance emission-suppressing apartment house, characterized in that the chemical substance emitted from the vibration-proof rubber legs is not diffused indoors by being discharged outdoors by a ventilation device that is always operated.

Images