JP2855491B2 - Sound insulation floor structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation floor structure having high sound insulation performance.

[0002]

2. Description of the Related Art In general, a door between upper and lower floors of a building is designated as one.
There is a straight ceiling slab consisting of a piece of concrete plate, which functions as a ceiling material from the lower floor and plays a role as a floor material from the upper floor. In addition, the slab is expected to have sound insulation in addition to the function as the door boundary.

Meanwhile, a wet floating floor structure is generally considered to be superior as a conventional sound insulating floor structure.
For example, as shown in FIG. 12, a vibration damping material D such as glass wool is spread over a concrete slab S, a concrete floor T is cast thereon, and a leveling mortar M
On the surface of which is finished with a finishing material F.

[0004] However, the above-mentioned wet floating floor structure has a problem that the construction period on site is long, and when a pipe or the like is installed between the vibration damping materials D, the sound insulation performance is reduced. In addition, in this type of wet floating floor structure, the upper concrete floor T resonates with the impact sound of an extremely low frequency, generating an unpleasant floor impact sound particularly at around 63 HZ, which gives discomfort to residents on the lower floor. And so on.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide both a sound insulation for air sound and a sound insulation for floor impact sound. Another object of the present invention is to provide a sound-insulating floor structure capable of exhibiting a high-performance sound insulation function of the Architectural Institute of Japan standard and shortening the construction period.

[0006]

The sound-insulating floor structure of the present invention comprises:
A slab is integrally formed on a frame structure such as a beam or a wall, a sound absorbing material is laid on the slab, and a plurality of gibs are arranged in parallel above the slab, and both ends of the gigs are prevented. In the floor structure, which is supported on the above-mentioned frame structure via a vibration material, a number of joists are arranged in a direction perpendicular to the joist and fixed in parallel, and a floor board is mounted on the joists. The floor plate has a floor impact sound level L-40, and an air layer having multiple functions of equipment piping or storage under the floor is formed between the floor plate and the floor plate. The thickness of the air layer is 300 mm
It is preferable that it is above. The sound absorbing material is, for example, glass wool. Furthermore, the present invention is characterized by changing the shape and size of the large pulley disposed in the central portion to increase the strength, or collecting the pulling near the central portion to restrain the vibration of the central portion of the floorboard. And The floorboard is formed, for example, by laminating a floor base material, a vibration damping material, and a floor finishing material. The pulling bar is formed of, for example, an H-shaped steel, and the joist is formed of, for example, a square steel pipe.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a beam as a frame structure of an RC (reinforced concrete) building, 2 denotes a wall, and a slab 3 is integrally formed between left and right beams 1. Since the slab 3 receives only a horizontal force and does not receive a vertical load, the slab 3 is thinner than the conventional slab S shown in FIG.
mm). A sound absorbing material 4 such as glass wool is laid on the entire upper surface of the slab 3.

Reference numeral 5 denotes a pullout made of an H-shaped steel material or the like. As is apparent from FIG. 4, a plurality of pulleys are arranged in parallel, and both ends thereof are interposed via anti-vibration rubber 6. The beam 1 having high frame rigidity is intensively supported by vibration isolation. For this reason, the beam 1 of this embodiment is a reverse beam. Incidentally, the large pulling 5 may be supported by the wall 2.

A plurality of steel joists 7 composed of a square tube made of steel are arranged in parallel on the pulling pulley 5, and as shown in FIG. 2, are fastened and fixed by fixing members 7a such as bolts and nuts. ing. 7b is a hole for inserting a bolt or a tightening tool.

A floor plate 8 is mounted on the joist 7. As shown in FIG. 3, the floor plate 8 includes a floor base material 8a such as a particle board and a vibration damping material 8b such as a sile sheet.
And a plywood 8c as a floor finishing material. The floor base material 8a is fixed to the joist 7 by tapping screws 8a '. The plywood 8c is a nail 8c '.
To the floor base material 8a and the like. As described above, since the main floor plate 8 has the damping material 8b laminated in a sandwich shape between the floor base material 8a and the floor finishing material 8c, a damping effect can be expected, and the underfloor sound pressure level can be reduced.
The effect of airborne noise can be suppressed. 8d is caulking.

Referring again to FIG. 1, the floor plate 8 and the slab 3
An air space 9 is formed between the two. This air layer 9
Is required to be at least 300 mm or more in order to improve the sound insulation performance and the vibration damping effect of the air spring.

Considering the workability due to its weight and the like, the interval of the above-mentioned pull-out 5 is optimally about 3,000 mm.
FIGS. 5A and 5B show the vibration mode of the floor plate 8, wherein FIG. 5A shows the primary mode, FIG. 5B shows the secondary mode, FIG. 5C shows the tertiary mode, and FIG. 5D shows the quaternary mode. The primary natural frequency (fo) of the floor panel 8 is 15 to 20 HZ, and the determination frequency of the heavy floor impact sound is 63 HZ. Therefore, in order to reduce these low-frequency vibrations rationally, it is only necessary to reduce the vibrations in the first and third modes. That is, it is most efficient to restrain the vibration of the central portion of the floor panel 8.

As is apparent from FIG. 4, the pulleys 5 in the above embodiment have the same cross section and are arranged at equal intervals. However, in order to suppress the vibration at the center of the floor plate 8,
As shown in FIG. 6, it is possible to further reduce the vibration in the first and third modes by increasing the shape and size of the central portion 5 'to enhance the strength.

FIG. 7 shows that the H-shaped steel of the large pulley 5 at the center is replaced with a channel steel of low strength at the other large pulleys 5 ″.
As a result, another embodiment is shown in which the strength of the central pulley 5 is enhanced. Even in this case, the workability does not change at all.

FIG. 8 shows that a plurality of (in this embodiment, two) large pulleys 5 having the same cross section are arranged at the center without changing the shape and dimensions of the pulley 5, thereby enhancing the rigidity of the central portion. In this embodiment, another embodiment in which the floor impact sound level is reduced will be described.

Further, FIG. 9 shows that the large vibrations 5 in the primary mode and the tertiary mode are reduced by arranging the guides 5 of the same cross section at unequal intervals so as to be dense in the center. This is another embodiment in which the noise of 63HZ which is the impact sound performance determination frequency is reduced.

FIG. 10 is a graph showing the sound insulation performance of the floor structure of the present invention. Regarding the floor impact sound insulation performance, it is proved that the light floor impact sound level LL value and the heavy floor impact sound level LH value satisfy L-40 (corresponding to the special grade of the Architectural Institute of Japan) regardless of the floor finishing material. Have been. The room-to-room sound pressure level difference is L-65 to L-70 due to the double floor structure of the large air space 9, and it has been proved that the room has a performance equivalent to a soundproof room.

[0018]

Advantages of the Invention 1) Since it has sound insulation performance enough to make it possible to live in the next door without hesitation, it is possible to adjoin residents different in family structure, living time, etc., and it is possible to have a comfortable life with each other. 2) By reducing the floor vibration in the primary to tertiary modes, the frequency that determines the weight floor impact sound performance of the sound insulation floor is 63.
Reduce HZ noise. 3) By reducing floor vibration in the primary mode, bodily sensation vibration accompanying walking or the like is reduced. 4) The air layer can have various functions such as a kotatsu and a storage under the floor, as well as various equipment pipes. Even if pipes and the like are installed in this air layer, the sound insulation performance does not decrease. 5) The floor impact sound level is reduced to L-40 by laminating a floor base material, a damping material such as a sile sheet, and a floor finish material. 6) The construction period can be shortened. 7) Lightening of each member is possible, and construction by hand is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a sound insulation floor structure according to the present invention.

FIG. 2 is a cross-sectional view showing a structure for fixing a puller and a joist.

FIG. 3 is a sectional view showing a fixing structure between a joist and a floor material and a structure of the floor material.

FIG. 4 is a diagram showing a vibration mode of a floor material.

FIG. 5 is a cross-sectional view taken along the line II of FIG. 1;

FIG. 6 is a cross-sectional view of another embodiment in which a central portion is enlarged.

FIG. 7 is a cross-sectional view of another embodiment in which a portion other than the center portion is formed of a channel steel.

FIG. 8 is a cross-sectional view of another embodiment in which two large pullers are arranged at the center.

FIG. 9 is a cross-sectional view of another embodiment in which a plurality of pulleys are gathered at a central portion.

FIG. 10 is a graph showing floor impact sound insulation performance of the floor structure of the present invention.

FIG. 11 is a graph showing the sound insulation performance of the floor structure of the present invention.

FIG. 12 is a sectional view showing a conventional floor structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beam 2 Wall 3 Slab 4 Sound absorbing material 5 Large pull 5 'Large pull 5 "Heavy pull 6 Anti-vibration rubber 7 Joist 7a Fixture 7b Hole 8 Floor plate 8a Floor base material 8a' Tapping screw 8b Damping material 8c Plywood 8c 'nail 8d Caulking 9 air layer

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kozo Sakaba 817-3 Koyama, Matsudo-shi, Chiba (56) References JP-A-62-25666 (JP, A) JP-A-63-272858 (JP, A) Kaihei 3-28455 (JP, A) Real Kaihei 2-5518 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04F 15/20 E04B 5/43 E04F 15/00 E04F 15/18 601

Claims (8)

(57) [Claims] 1. A slab is integrally formed on a frame structure such as a beam or a wall, a sound absorbing material is laid on the slab, and a plurality of pulleys are arranged in parallel above the slab. Are supported by the above-mentioned skeleton structure via a vibration isolator, and a large number of joists are arranged in a direction perpendicular to the joist and fixed in parallel, and a floor board is mounted on the joists. Wherein the floorboard has a floor impact sound level L-40, and an air layer having multiple functions of equipment piping or storage under the floor is formed between the floorboard and the floorboard. . 2. The sound insulation floor structure according to claim 1, wherein the thickness of the air layer is 300 mm or more. 3. The sound insulation floor structure according to claim 1, wherein the sound absorbing material is glass wool. 4. The sound insulation floor according to claim 1, wherein the shape and size of a large-sized portion arranged in the center portion are changed to increase the strength and restrain the vibration of the center portion of the floorboard. Construction. 5. The system according to claim 1, wherein the pulling bar is gathered in the vicinity of the central portion to restrain the vibration of the central portion of the floorboard.
The sound-insulating floor structure described in 1. 6. The sound insulation floor structure according to claim 1, wherein the floorboard is formed by laminating a floor base material, a vibration damping material, and a floor finish material. 7. The sound insulation floor structure according to claim 1, wherein said pulling is made of H-shaped steel. 8. The sound insulation floor structure according to claim 1, wherein said joist is constituted by a square steel pipe.