JPS6255358A - Floor structure of house according to framework wall construction method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a floor structure of a frame wall construction house.

(b) Conventional technology and its problems Traditionally, the floor structure of houses using the frame wall construction method, for example,
As shown in the figure and FIG. 7, side joists 2. The upper and lower surfaces of the upper floor framework l, which is made up of floor joists 3 and end joists 4, are covered with floor boards 5 made of rigid structural plywood, etc., and ceiling boards 8 made of gypsum board, etc., and each joist is covered with An underfloor air chamber in between! 0 is formed. In addition, 3a is a reinforcing material, 6 is felt, and 7
is a carpet.

However, in this case, since the upper and lower surfaces of the upper floor framework l are covered with the floor plate 5 and the ceiling plate 8, the upper floor has a substantially rectangular parallelepiped shape (with a so-called drum-like structure under the upper floor).
A large number of underfloor air chambers 10 with a cross section of 254 mm x 455 mm will be formed.

Therefore, when an impact sound is applied to the floor surface of the upper floor, the underfloor air chamber I
The air inside O vibrates, and the vibrations of this air cause the ceiling panel 8 on the floor below to vibrate.
As a result, in the conventional floor structure, the impact sound applied to the floor surface of the upper floor propagated to the lower floor without being attenuated, resulting in poor sound insulation properties.

In addition, impact sound, especially weight impact sound, is not only propagated by air vibrations, but also by the solid vibrations of the floor joists 3, so the solid vibrations of the floor joists 3 are propagated directly to the ceiling surface of the lower floor, and There was a problem that the sound insulation properties of the structure were further deteriorated.

(c) Means for solving the problems In view of the above-mentioned problems, the floor structure of the house using the frame wall construction method according to the present invention has an areal density of 5, Oirg between the opposing sides of each joist constituting the upper floor framework. / tn' or more sound insulating board is not directly fixed to the floor joists, but is horizontally hung via materials etc. to partition it into upper and lower parts. It has a structure in which a ceiling board is placed on the underside of a ceiling base material made of ceiling joists spanned so that

(d) Actions and Effects Therefore, according to the present invention, the interior of the upper floor framework is partitioned into upper and lower parts by sound insulating plates, so that the impact sound applied to the upper floor surface is located at the upper part of the interior of the upper floor framework. Even when the air is vibrated, much of that energy is consumed in vibrating the sound insulation board. Therefore, the propagation of sound due to air vibrations is significantly reduced, and the air vibrations located below the interior of the upper floor framework are reduced.

In addition, the sound insulation board described in ``1'' is not fixed to the joist (4) with nails, etc., and the support is placed on the upper surface of the material and suspended horizontally, so the sound insulation board has a +++1 free vibration displacement of the joist material.For this reason, The vibration of the sound insulating board does not directly propagate to the joists; even if it does, it will not propagate to the ceiling surface because it is separated from the ceiling base.

As a result, according to the floor structure according to the present invention, the transmission of airborne sound due to air vibration within the upper floor framework is reduced, and excellent sound insulation properties can be obtained.

However, since the ceiling board is attached to the ceiling base material, which is made up of ceiling joists that are separate from the floor joists and are not directly connected to them, solid-borne sound due to the solid vibration of the floor joists is transmitted to the ceiling joists. It is difficult to transmit the problem to the ceiling board. Therefore, the floor structure according to the present invention has the effect that even more excellent sound insulation characteristics can be obtained.

(E) Embodiment Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings of FIGS. 1 to 5.

This embodiment is generally composed of an upper floor frame 1, a floor board 5, a sound insulating board 11, and a ceiling base material 20 on which a ceiling board 8 is stretched.

The upper floor floor framework l is an outer frame made by combining side joists 2 and end joists 4, and is partitioned by placing floor joists 3 parallel to the side joists 2 in parallel with each other. For example, the cross section is 4c
While standard materials of mX 24, l Cm are used,
The pitch between the side joists 2 and the floor joists 3 and the pitch between the floor joists 3.3 are appropriately selected, and they are arranged side by side at equal intervals.

Since the floorboard 5 is laid on the upper surface of the second-story floor framework 1, for example, structural plywood or the like having high rigidity is used. A finished floorboard 6a is stretched over the floorboard 5.

The sound insulating board 11 includes an elastic mat 13 made of rubber or the like on the upper surface of a support plate 12, which is provided approximately at the center of the side surface where the side joist 2 and the floor joist 3 face each other, or the side surface where the floor joist 3.3 faces each other.
It is placed horizontally through a 011-shaped upper floor framework and partitions the inside of the upper and lower floor frameworks into upper and lower parts.The material can be any material, but it has an areal density of 5. , Okg/m' or more is desirable. In other words, since the surface density of the sound insulating board is 5.0 kg/m, it is approximately 3.
A reduction in transmitted sound of about 5 dB is expected for a material with an areal density of 0.0 kg/m'', and it is assumed that this alone will reduce the auditory sense by 20% and 30%, respectively.

In addition, I4 is caulking (O) made of urethane resin etc. to seal the gap between the sound insulation board and the material of the receiver.
5 is a sound insulating tape that seals the parts where the sound insulating plates are pressed against each other.

In this embodiment, the sound insulating board +1 is not fixed to the cow seat 12, but is simply placed on the elastic mat, so that the air vibrations caused by the vibration of the floorboard are not fixed on the cow 12. The air vibration energy is propagated to the sound insulating plate 11 having a large specific gravity, and the air vibration energy is absorbed by the vibration of the sound insulating plate, which has the advantage that the sound insulating properties are further improved.

The ceiling base material 20 has ceiling joists 21 and end joists 4 placed on it.
It is constructed by spanning fixed head bridges 19 at a pitch of 455 mm (see Figure 3).

In other words, the ceiling joists 21 are connected to the side joists 2 and floor joists 3 installed in parallel.
and between the floor joists 3 and 3, and between the floor joists 3 and 3.
There is a slight gap between the lower surface of the Further, the ceiling base material 20 has board supports with a cross section of 4 cm x 4 cm placed evenly between the ceiling joists 21 and 21 at appropriate intervals so as to cross the material 22 at right angles.
．． A sound absorbing material 23 made of rock wool or the like is arranged between the two. A ceiling board 8 made of gypsum board or the like is stretched on the lower surface of this ceiling base material 20, and a finishing material 9 (for example, gypsum board, rock wool sound absorbing board, etc.) is stretched on the surface thereof. .

That is, since the ceiling base material 20 is not directly connected to the floor joists, the solid vibrations of the floor joists are not transmitted to the ceiling surface, and the propagation of impact sound from the upper floor can be interrupted.

As a construction method, for example, the cross-sectional dimensions are 4c+nX24
By forming an outer frame with side joists 2 and end joists 4 made of standard materials of , Icm, and partitioning the side joists 2 of this outer frame by placing floor joists 3 in parallel at a pitch of 455 mm, the upper floor Form a framework l.

Next, install structural plywood (15 mm thick) on the top of the upper floor framework l.
) is laid by nailing together with an adhesive to form the L floor surface.

Then, a sound insulating plate 1 is placed approximately in the center of the side surfaces where the side roots 2 and the floor joists 3 face each other, and the sides where the floor joists 3 and 3 face each other.
The wooden support that receives 1 is nailed to the material 12.12, and this support has an elastic mat 13 made of rubber material (thickness 5
mm).

Further, on the elastic mat 13, a hard wood cement board (thickness 12 mm) with a specific gravity of 1.1 is placed with an areal density of 14 kg.
/m' sound insulating board 11 is laid without any gaps, and this sound insulating board 11
．． 11. Attach sound insulating tape 15 to one end surface of U from the ceiling side to seal it (see Figure 2).
An elastic caulking material 14 is injected into the corner where the sound insulating plate I+ and the sound insulating mat 13 come into contact to seal it.

Then, a ceiling joist 21 (cross section: 4 cm x I 4.3 cm) is partially recessed and placed in parallel with the head joist 19 on which the end joist 4 is placed and fixed.
The board support is made of material 22 (cross section is 4 cm
4 am) at a pitch of 455 mm, a sound absorbing material 23 (thickness 50 mm) made of rock wool is arranged between the board supports 22.

Finally, a ceiling board 8 made of gypsum board (thickness 12 mm)
is stretched on the lower surface of the ceiling base material 2o, and then a rock wool sound absorbing board (thickness 12 mm) is stretched as a finishing material 9,
Complete construction.

Next, a description will be given of experiments on the sound insulation properties according to the present invention, particularly on the sound insulation properties against light impact noise from a tapping machine and heavy impact sound from a bang machine.

This experimental example was conducted in the case where the finishing material 9 made of rock wool sound absorbing board was not applied to the ceiling board 8 in the construction example described above, and the finishing material 6a was not applied to the floor board 5. The experimental results are as follows. , are shown in the graphs of FIGS. 3 and 4 together with the experimental results regarding the conventional floor structure. Note that FIG. 3 shows the case of light impact sound, and FIG. 4 shows the case of heavy impact sound.

From the results of this experiment, it was found that the floor structure according to the present invention has a higher sound pressure of propagated sound than the conventional floor structure from low frequency to high frequency in both cases of light impact sound and heavy impact sound. The sound level was reduced by 5 to 10 dB, and it was found to have excellent sound insulation properties, with only about half the sound intensity being felt compared to conventional floor structures.

In addition, in the floor structure according to the present invention, a reinforcing material may be provided between the opposing side joists and the floor joists or between the floor joists.

Moreover, it is of course possible to span the lower surface of the ceiling joists constituting the ceiling base material with a roof edge, and to extend the ceiling board over this roof edge.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention,
Figure 1 is a front sectional view, Figure 2 is a plan view, Figure 3 is a side sectional view, Figures 4 and 5 are graphs showing experimental results,
FIGS. 6 and 7 are a front sectional view and a perspective view of an embodiment according to the conventional example. 1. Upper floor frame, 2. Side joists, 3. Floor joists, 4.
... end joist, 5... floor board, 8... ceiling board, 11...
Sound insulation board, 20...Ceiling base material, 21...Ceiling joist. Fig. 4 Octave emperor bar (ψpCfijJ 5 leather vase i (HX)
Figure 5

Claims (1)

[Claims] (1) In the floor structure of a framed wall construction house in which the upper surface of an upper floor framework formed by framing side joists, floor joists and end joists arranged side by side is covered with floorboards, the opposing sides of each of the joists. A sound insulating board having an areal density of 5.0 kg/m^2 or more is hung horizontally in between to partition the space into upper and lower parts, and it is placed below the sound insulating board and parallel to the floor joists. A floor structure for a framed wall construction house characterized by a ceiling board placed on the underside of a ceiling base material made of ceiling joists.