JPH09221849A - Sound insulating material for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely insulate the generated noise by fitting a sound insulating material inside of a building. SOLUTION: This sound insulating material is formed by integrally fitting a surface sheet material 3 and a back surface sheet material 4 to a surface side and a back surface side of a core material 2 of the honeycomb structure having multiple separated spaces 23. The surface sheet material 3 is formed with a through hole 31 per each separated space 23 of the core material 2, and a punched piece generated from the through hole 31 is positioned inside of the separate space 23, and in this condition, the surface sheet material 3 is fitted to a building so as to face to a sound generating source side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulating material for a building, which is installed inside a building to reliably block noise.

[0002]

2. Description of the Related Art Noise sources in buildings include, for example, children's rooms and lesson rooms for musical instruments in general households, and adjacent rooms in buildings for apartment houses and hotels. There are water and sewage pipes, and in high-rise buildings, there is a machine room for driving elevators. These noise sources need to be muted to prevent noise from transmitting to other rooms. Conventionally, in order to muffle the noise source, the partition wall is thickened or a sound insulating material is interposed inside the wall.

[0003]

Therefore, the conventional sound insulation structure does not have a sufficient silencing effect and must withstand the noise generated from the noise source. In addition, if the sound is to be silenced sufficiently, not only the wall becomes significantly thick, but also the sound insulation device must be installed at a high cost. In particular, for elevators in high-rise buildings, a large-scale device for driving several or several elevators is installed in the machine room, and the machine room generates extremely high noise. A huge amount of cost is required for a sound insulation device that surrounds the sound-absorbing device to sufficiently muffle the sound. Therefore, there is a demand for a sound insulating material that is simple and easy to construct, and can reliably muffle noise, although it is extremely inexpensive.

[0004]

In order to solve the above-mentioned conventional problems, the present invention provides a surface sheet material on each of the front surface side and the back surface side of a core material having a honeycomb structure having a large number of independent spaces, The back sheet material is attached, and the front sheet material is provided with a through hole for each independent space portion of the core material, and the punching piece generated by the opening of the through hole is positioned inside the independent space portion. Since the surface sheet material is positioned on the noise source side and attached to the building, the noise of the source is
The sound insulation effect is remarkably improved because the punching piece is unlikely to leak out to the outside from the through hole.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a surface sheet material and a back sheet material are bonded to the front surface side and the back surface side of a honeycomb-structured core material having a large number of independent spaces, respectively. A through hole is opened for each independent space of the core material, a punching piece generated by the opening of the through hole is positioned inside the independent space, and the surface sheet material is positioned on the noise source side for construction. Since it is attached to an object, one or both of the surface sheet material and the back sheet material are polymerized with resin, kraft paper and aluminum foil to further enhance sound insulation, and strength, water resistance, and physical properties such as water insulation. It is designed to increase the physical strength.

[0006]

EXAMPLE An example of the present invention will be described with reference to the drawings. In the sound insulating material 1 of the present invention, a surface sheet material 3 is bonded to the front surface side of a core material 2, and a back surface sheet material 4 is bonded to the back surface side. It is a structure in which an agent or the like is integrally attached.

The core material 2 has a honeycomb structure. As shown in FIG. 1 or 2, the first corrugated sheet material 21 and the second corrugated sheet material 22 are juxtaposed to each other so that the troughs and peaks of both sheet materials are formed. A plurality of independent spaces 23 having a polygonal shape or a rhombic shape are provided by being fixed to each other with an adhesive or the like. The first corrugated sheet material 21 and the second corrugated sheet material 22 have a thickness of 2
It is possible to use kraft paper of about millimeters, surface-treated cardboard for improving strength and weather resistance, and other papers.

Then, the core material 2 is cut in a direction orthogonal to the length direction of the independent space portion 23, and the front surface sheet material 3 and the back surface sheet material 4 are provided on the front surface side and the rear surface side of the cut surface. Are glued together with an adhesive or the like. Therefore, the front surface sheet material 3 and the back surface sheet material 4 have a large number of independent space portions 2.
3 is a structure in which the front side and the back side are airtightly closed.

The surface sheet material 3 and the back sheet material 4 are
Although a kraft paper having a thickness of about 2 mm may be used, a sheet material having higher strength, weather resistance, water resistance and sound insulation than kraft paper may be used depending on the intended use of the sound insulation material. As an example, as shown in FIG. 4, for example, one or both of the top sheet material 3 and the back sheet material 4 are provided on both sides of a foil 51 made of aluminum or another metal, and a kraft paper 52 having a thickness of about 2 mm, In this structure, 52 is integrally polymerized, and a resin layer 53 formed by coating resin or laminating is provided on the surfaces of both kraft papers 52.

Then, in the surface sheet material 3, one through hole 31 is provided for each independent space portion 23, and the through hole 3 is formed.
The inside of the independent space portion 23 is communicated with the outside by 1.
The through holes 31 are formed by previously punching the surface sheet material 3 from one surface with a drill or the like. The punching piece 3 continuous with the surface sheet material 3 generated by the punching.
2 is bent so as to be located inside the independent space portion 23 and integrally bonded to the core material 2.

In the sound insulating material 1 having the above-described structure, the core material 2 has a honeycomb structure, and the sheet material is provided on the front surface side and the back surface side to close the independent space portion 23 of the honeycomb structure, and one sheet A through hole 31 is formed in the material for each independent space portion 23, and a punching piece 32 is located inside the independent space portion 23. Therefore, when the sound insulation material 1 is made to face the sound insulation material 1 side having the through hole 31 toward the noise generation source side, the sound wave of the noise generated from the noise generation source is trapped inside the independent space portion 23 from the through hole 31. In particular, since the sound trapped in the independent space portion by the punching piece 32 does not leak outside, sound insulation,
The sound deadening effect is significantly improved. Further, as the opening area of the through hole 31 becomes larger, the sound is more likely to pass through and the punching piece 32 becomes larger. Therefore, the punching piece 32 stays in the independent space portion 23 and sufficiently prevents leakage, so that the sound deadening effect is obtained. Get higher However, if the through holes 31 are too large, sound will not be collected inside the independent space portion 23. Therefore, the area of the through holes 31 of the sound insulation material 1 used as a building is equal to that of the independent space portion 2.
20 to 70% of the cross-sectional area of 3 is desirable.

FIG. 5 shows another embodiment of the present invention, in which a thick and breathable muffling sheet 61 is attached to the surface of the surface sheet material 3 on the surface side of the sound insulating material 1. Similarly, in the surface sheet material 3, a through hole 31 is opened for each independent space portion 23 of the core material 2. As the muffling sheet 61, a nonwoven fabric having a thickness of about 1 to 5 mm can be used, and the muffling sheet 61 can also be used as a surface decoration material of the muffling material 1. When the muffling sheet 61 is attached to the surface of the surface sheet material 3, the sound from the front side enters the independent space 23 from the through hole 31 in a state of being muffled by the muffling sheet 61 to some extent. improves.

Specific sound measurement examples using the sound insulation material of the present invention will be described below. [Example] A radio cassette tape was placed on a table, and a normal sound level meter (NA-20 manufactured by Rion Co., a noise level measuring range of 27 to 130 dB, and a working frequency was set at a position 100 cm away from the radio cassette tape. Three
(1.5 to 8,000 Hz), and the sound generated from the radio cassette tape was measured with the ordinary sound level meter. When the sound produced without covering the radio cassette tape was measured, the highest was 92 phons and the lowest was 75 phons. Then, out of two sheets with a total thickness of 2 mm in which both sides of the aluminum foil are polymerized with kraft paper and resin is coated on both sides, a large number of through holes with a diameter of 4 mm are opened in one sheet to cut the independent space portion. The sheet having the through holes is adhered to the surface side of the honeycomb-structured core material having an area of about 1.5 cm ² so that each through hole is located in each independent space portion and the punched piece is placed in the independent space portion. , And another one sheet is adhered to the back side of the core material to create a sound insulating material having a total thickness of 30 mm. Only the lower surface is opened by using this sound insulating material, and the height, width and A box frame body is formed so that the sheet having a depth of 50 cm and a through hole is located on the inner surface side, and the box frame body is attached to the radio cassette tape to insulate the sound and separated from the radio cassette tape by 100 cm. Radio under the same conditions as above Once you have measured the sound from the set tape, the highest of 65 phone, the lowest was 55 phone.

[Comparative Example] The above-mentioned embodiment was carried out by a sound insulating material which was used instead of the sheet of the through hole adhered to the surface side of the core material used in the above example, instead of the sheet of the same structure having no through hole. When a box frame body having the same size as that of the example was molded and was attached to a radio cassette tape in the same manner as in the above example and the sound was measured under the same conditions, the maximum was 78 phons and the minimum was 65 phons.

[0015]

In summary, according to the present invention, the surface sheet material and the back sheet material are bonded to the front surface side and the back surface side of the core material of the honeycomb structure having a large number of independent spaces, respectively, to form the surface sheet material. A through hole is provided for each independent space portion of the core material, the punching piece generated by the through hole is positioned inside the independent space portion, and the surface sheet material is exposed to the noise source side. Since it is attached to the building, the sound generated from the noise generating source is trapped in the independent space portion from the through hole in the sound insulating material, so that the sound insulating and noise effects are remarkably improved. Moreover, since the material is paper and the like, it is not only lightweight and has good workability, but it can also be provided at low cost, especially by attaching it to the wall of the machine room of the elevator of a high-rise building. It is possible to reliably prevent large noise from leaking inside the building.
Further, since the sound insulation material of the present invention is mainly made of paper, it has good adhesiveness to all parts. By directly adhering to the wall surface and decorating the interior surface, it is possible to highly insulate the interior of the room. Further, for example, when it is used on the wall surface of an accommodation building such as a hotel or an inn, not only the sound insulation effect with the adjacent room is enhanced, but also the sound of water and sewerage in the adjacent room is not transmitted and the value as an accommodation building can be enhanced. . Further, even in a general house, the noise is not transmitted to the next house by being attached to and surrounded by a room where noise is generated, for example, a wall of a children's room or a musical instrument lesson room.

Further, as described in claim 2, one or both of the top sheet material and the back sheet material is made of resin,
When kraft paper and aluminum foil are polymerized, they have excellent strength, weather resistance and water resistance, so not only can they withstand long-term use, but water resistance also reduces corrosion and sound insulation effects. It is possible to provide a product with high practical value.

[Brief description of drawings]

FIG. 1 is a plan view in which a part of a surface sheet of a sound insulating material of the present invention is cut.

FIG. 2 is a perspective view showing a part of FIG. 1 as a cross section.

FIG. 3 is a vertical sectional side view of FIG.

FIG. 4 is an enlarged sectional view of a circular portion of FIG.

FIG. 5 is a vertical sectional side view of another embodiment of the present invention.

[Explanation of symbols]

 1 Sound Insulation Material 2 Middle Core Material 3 Top Sheet Material 4 Back Sheet Material 21 First Corrugated Sheet Material 22 Second Corrugated Sheet Material 23 Independent Space Section 31 Through Hole 32 Punching Piece 51 Foil 52 Craft Paper 53 Resin Layer 61 Noise Reduction Sheet

Claims (3)

[Claims] 1. A front sheet material and a back sheet material are attached to the front surface side and the back surface side of a honeycomb-structured core material having a large number of independent space portions, and the surface sheet material has each independent space of the core material. A through hole is opened for each part, the punching piece generated by the through hole is located inside the independent space part, and the surface sheet material is made to face the noise source side and attached to the building. Characteristic sound insulation material for buildings. 2. The sound insulation material for a building according to claim 1, wherein one or both of the top sheet material and the back sheet material are polymerized with resin, kraft paper and aluminum foil. 3. The sound insulation material for a building according to claim 1, wherein a sound deadening sheet is provided on the surface of the surface sheet material.