JP2007052101A - Sound/vibration insulating material using hollow material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound/vibration insulating material which has very excellent sound insulating properties and vibration insulating properties, can reduce the weight of a product, makes a contribution to save resources by reducing a raw material, and can reduce its manufacturing cost and transportation cost. <P>SOLUTION: Tube materials 2 having a hollow space 2a communicated to an opening part 2b (or 2c) are arranged side by side in a side direction, then are connected together into a sheet shape. Plastic films 3 are stucked to one face or both faces of the sheet. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sound and vibration isolating material used as a building material, a sound and vibration isolating material used as a part or accessory of various machines (work machines, industrial machines, automobiles, etc.), or along a roadway or railway. The present invention relates to a sound and vibration isolating material filled inside a noise preventing shielding plate to be installed, a sound and vibration isolating material to be installed on a road plate such as a road and a railway.

In general, when building floors and walls of buildings, soundproof and anti-vibration materials are placed on the floor side of flooring materials and wall panels to prevent noise and vibration from lower floors or neighboring houses. Yes. Various types of sound-proof and vibration-proof materials used as building materials have been commercialized so far, but at present, materials with high specific gravity (for example, asphalt, synthetic resin, etc.) The mainstream is a sound and vibration isolating material configured to reduce noise and vibration transmission by mixing iron powder, lead, etc.) and increasing the product weight.
JP-A-60-7963 JP 60-164534 A JP-A-8-150682 Japanese Patent Laid-Open No. 9-234818

  However, soundproof and vibration-proof materials with increased product weight naturally have problems in handling, transportation efficiency, transportation cost, etc. during transportation and construction. In recent years, the prices of metal materials such as iron powder and various synthetic resin raw materials have been on the rise, so that soundproof and vibration-proof materials using many raw materials have increased manufacturing costs and reduced profit margins. There's a problem.

  The present invention has been made to solve such problems in the prior art, and has extremely excellent soundproofing and vibrationproofing properties, and can be configured to reduce the product weight, thereby saving and reducing raw materials. The object is to provide a soundproof and vibration-proof material that contributes to resource recycling and can reduce manufacturing costs and transportation costs.

  The soundproof and vibration-insulating material of the present invention is characterized by being configured by combining a large number of tube materials having a hollow interior communicating with at least one opening. In addition, it is preferable to arrange the tube materials side by side and connect them to form a sheet, and it is preferable to attach a film to one surface or both surfaces of the sheet formed by the tube material. .

  Further, the soundproof and vibration-insulating material of the present invention may be formed into a sheet shape by weaving a tube material vertically and horizontally like a woven fabric, and furthermore, the tube material is randomly crossed and overlapped like a nonwoven fabric. Adjacent tube materials may be connected to each other using an adhesive or by heat fusion to form a sheet.

  As the tube material, a tube material having a diameter of 10 μm to 10 mm can be used, but considering the balance between the soundproofing effect and the material cost, a tube material having a diameter of 100 μm to 2 mm should be used. Is preferred.

  In addition, when a tube material is combined to form a sheet, the amount of the tube material to be used is about 60 to 70% of the flat area of the formed sheet as the total plane area of the combined tube material. (That is, a gap of about 30 to 40% of the plane area of the sheet to be formed is formed between the tube members). This is because by forming a gap having an appropriate size between the tube members, the dispersion efficiency of sound and vibration can be improved and the transmitted vibration can be effectively damped.

  The sound and vibration isolating material of the present invention can disperse sound and vibration in various directions and can cause various differences in transmission speed depending on the part. And exhibit vibration-proof properties.

  As a result, the entire volume can be configured to be small (thin), raw materials can be saved, resources can be saved, and manufacturing costs can be suppressed. Moreover, since the weight can be reduced, the burden during transportation can be reduced, and the handling property during construction is excellent. Furthermore, transportation efficiency can be improved and transportation costs can be reduced.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a “soundproof and vibration-proof material” according to the first embodiment of the present invention. The sound and vibration isolating material 1 is a sound and vibration isolating material for flooring (used as “building material” disposed on the floor side of a building flooring), and has a shape, structure and dimensions suitable for such applications. ing. More specifically, a large number of elongated tube-shaped materials (tube material 2) are juxtaposed side by side (in a direction perpendicular to the longitudinal direction) like ridges and connected to form a sheet, The plastic film 3 is stuck on one surface thereof.

  The tube material 2 is formed of a soft synthetic resin, and each has a diameter (outer diameter) of 2 mm and a length of 91 cm. Moreover, as shown, the inside is hollow and both ends are open. The hollow interior 2a communicates with the openings 2b and 2c opened at both ends. That is, the hollow interior 2a is consistent from one opening 2b to the other opening 2c.

  A series of tube materials 2 are connected by weaving a plurality of yarns 4 (or single yarns) so that the upper and lower sides of each tube material 2 are alternately switched. A constant gap (about 1 mm) is formed between the two.

  The soundproof and vibration-insulating material 1 of the present embodiment relates to the shape and structure as described above, and has extremely high soundproofing and vibration-proofing performance. Transmission of noise and vibration to the floor (or upper floor) can be effectively reduced.

  This point will be described in more detail. As described above, the sound and vibration isolator 1 of the present embodiment includes a tube material 2 having a consistent hollow interior 2a from one opening 2b to the other opening 2c. By using the tube material 2 having such a structure, the transmission of sound (vibration) can be dispersed in various directions, and various differences in the transmission speed occur depending on the part. Due to the synergistic effect of them ("difference in transmission direction" and "difference in transmission speed"), extremely high sound and vibration insulation properties are exhibited.

  FIG. 2 is a diagram schematically illustrating a phenomenon in which sound transmission is dispersed in various directions in the tube material 2 and various differences in transmission speed are generated, and FIG. FIG. 2B is a vertical sectional view of the tube material 2 along the direction orthogonal to the longitudinal direction. As shown in the figure, when the vibration F of sound is transmitted from the upper sound source to the tube material 2, the vibration F is generated by the synthetic resin portion 2d (solid) constituting the tube material 2 and the air inside the hollow interior 2a. In this way, the signals are distributed in a wide variety of directions outward and downward.

  The speed at which the vibration is transmitted differs depending on the density of the substance that mediates the transmission, and the solid having a higher density has a higher transmission speed than the gas, and therefore is transmitted through the synthetic resin portion 2d. The vibrations Fx, Fy, and Fz that are transmitted are transmitted faster than the vibrations Fa, Fb, and Fc that are transmitted through the gas in the hollow interior 2a.

  Further, as shown in FIG. 2 (1), the vibrations Fx and Fy that have traveled in the longitudinal direction through the synthetic resin portion 2d and reached the end of the tube material 2 are further dispersed from the surroundings. The vibrations Fx ′ and Fy ′ transmitted in the air are attenuated more than the vibrations Fx and Fy. Similarly, the vibrations Fa and Fb, which travel in the longitudinal direction through the air inside the hollow interior 2a and reach the openings 2b and 2c of the tube material 2, are transmitted to the surrounding air while being further dispersed therefrom. (Vibration Fa ′, Fb ′) and will be damped.

  Further, as shown in FIG. 2 (2), the vibration Fz traveling downward through the synthetic resin portion 2d is transmitted from the outer peripheral surface of the tube material 2 to the surrounding air. The vibration Fz ′ transmitted into the air is attenuated more than the vibration Fz. Further, the vibration Fc traveling downward through the air in the hollow interior 2a is transmitted to the air below the tube material 2 through the synthetic resin portion 2d (and the plastic film 3 shown in FIG. 1) (vibration). Fc '), it will be attenuated.

  As described above, the sound and vibration isolator 1 shown in FIG. 1 is configured by using a large number of tube members 2 having a consistent hollow interior 2a, so that the transmission direction of sound (vibration) can be widely dispersed. At the same time, various transmission speeds can be generated depending on the transmission site, and the synergistic effect of them can exhibit extremely high soundproofing and vibration isolation.

  As a result, the sound and vibration isolating material 1 of the present embodiment can be configured to have a small (thin) overall volume, save raw materials, contribute to resource saving, and reduce manufacturing costs. In addition, since the weight can be reduced, the burden during transportation can be reduced, and handling during construction is also good. Furthermore, transportation efficiency can be improved and transportation costs can be reduced.

  In this embodiment, the tube material 2 having a diameter of 2 mm is used as a component of the sound and vibration isolator 1, but a tube material having a diameter of about 10 μm to 10 mm is used depending on the application, application target, and the like. It can also be used. Moreover, in this embodiment, although the synthetic resin thing is used as the tube material 2, the tube material formed with other materials (natural rubber, synthetic rubber, metal, glass, ceramics, etc.) is used. You can also. In addition, it is possible to cover a wider frequency band by designing an appropriate composite material (for example, made of metal and synthetic rubber) as the material of the tube material in consideration of the frequency of sound and vibration to be damped. A soundproof and vibration proof material can be obtained.

  Further, the outer shape and the hollow shape appearing on the shearing surface of the tube material 2 are not only a perfect circle but also an ellipse, a triangle, a quadrangle, other polygons, or an indefinite shape, and have a hollow portion inside, and If the hollow part is consistent and at least one end is open, it can be used preferably.

  In addition, the sound and vibration isolating material 1 of the present embodiment has a configuration in which a large number of tube materials 2 are connected to form a sheet, and a plastic film 3 is attached to one surface of the sheet. The plastic film may be attached to both sides, or the plastic film may be omitted. However, if a plastic film is attached to at least one surface, vibration is more easily dispersed and the soundproofing and vibration isolating effects are increased.

  Furthermore, the connection method of the tube material does not necessarily have to be connected to the side like a ridge, but the tube material is configured to be formed into a sheet shape by weaving it vertically and horizontally like a woven fabric. Alternatively, like a non-woven fabric, the tube materials can be randomly intersected and overlapped, and the adjacent tube materials can be connected to each other by using an adhesive or by heat fusion to form a sheet. Moreover, a tube material can also be connected in the shape of a cage.

  In addition, although the sound-proof and vibration-insulating material used as the “building material” disposed below the flooring material has been described here, the use of the sound and vibration-proofing material according to the present invention is not limited to the “building material”. Soundproof and anti-vibration materials used as parts or accessories for various machines, or soundproof and anti-vibration materials filled inside the noise-preventing shielding plates installed along roadways and railways, road boards such as roadways and railways It can be applied to various uses such as soundproof and vibration-proof materials installed in

  As a result of experiments conducted by the inventors, it was proved that the soundproof and vibration-insulating material of the present invention has better soundproofing and vibration-proofing properties than conventional heavy-duty soundproofing materials. Hereinafter, the results of experiments conducted by the inventors will be described as examples of the present invention. First, as materials used in the experiment, two types of soundproof and vibration-insulating materials 1 (see FIG. 1) according to the first embodiment of the present invention and conventional heavy-duty soundproof materials (“Conventional 1” and “Conventional 2”) are used. In addition, general flooring materials and plywood were prepared. Details of these materials are shown in Table 1.

  Next, by appropriately combining these materials, three types of “samples” using the soundproof and vibration isolating material of the present invention and “comparative examples” not using the sound and vibration isolating material of the present invention (sample materials) 1-3, Comparative Examples 1-3) produced. More specifically, the sample 1 is the one in which the soundproof and vibration-insulating material of the present invention is arranged between the upper flooring material and the lower plywood (middle layer), and the sample 2 has a thickness of 4 mm in the middle layer. The conventional heavy weight type soundproofing material and the soundproofing and vibration isolating material of the present invention are arranged, and the test material 3 is a conventional heavy weight type soundproofing material having a thickness of 6 mm in the middle layer and the soundproofing and vibration isolating material of the present invention. Are arranged. In Comparative Example 1, a conventional heavy-duty soundproofing material having a thickness of 4 mm is disposed in the middle layer, and in Comparative Example 2, a conventional heavyweight soundproofing material having a thickness of 6 mm is disposed in the middle layer. Comparative Example 3 is constituted only by an upper flooring material and a lower plywood.

  And about each of these sample materials 1-3 and Comparative Examples 1-3, the following noise reduction tests were done. A sample or a comparative example is held in a horizontal state, and above that, an impact sound is generated six times while changing the vibration frequency, and on each of the upper surface of the flooring material and the lower side of the lowermost plywood, The loudness (unit: dB) was measured. The vibration frequency of the impact sound was 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1000 Hz, and 2000 Hz. The measurement results are as shown in Table 2.

  From the above results, the sample 1 using the soundproof and vibration-insulating material according to the present invention has better soundproofing and vibration-proofing properties than Comparative Examples 1 and 2 using the conventional heavy-weighted soundproofing material. It was proved.

1 is a perspective view of a sound and vibration isolator 1 according to a first embodiment of the present invention. The vertical sectional view of the tube material 2 shown in FIG.

Explanation of symbols

1: Soundproof and vibration-proof material,
2: Tube material
2a: hollow interior,
2b, 2c: openings,
2d: synthetic resin part,
3: Plastic film,
4: Yarn

Claims (5)

  A sound and vibration isolating material comprising a combination of a plurality of tube materials having a hollow interior communicating with at least one opening.   The soundproof and vibration-insulating material according to claim 1, wherein the tube materials are arranged side by side and connected to each other to form a sheet.   The soundproof and vibration-insulating material according to claim 2, wherein a film is attached to one surface or both surfaces of a sheet formed of the tube material.   The soundproof and vibration-insulating material according to claim 1, wherein the tube material is formed into a sheet shape by weaving the tube material vertically and horizontally.   The soundproofing device according to claim 1, wherein the tube materials are randomly intersected and overlapped, and the adjacent tube materials are connected to each other by using an adhesive or by heat fusion to form a sheet. Vibration material.