JP2003055920A - Sound insulator and sound insulating structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulator having sound insulating performance for controlling sounds resulting from vibration. SOLUTION: The sound insulator 1 as a flexible laminated body controlling sounds propagating through solids is provided having a pair of base layers 1a made from a thermoplastic resin material, and an intermediate layer 2 made from a thermoplastic resin material with the addition of ligneous material grains and which is formed into a porous structure. The sound insulator contains as the thermoplastic resin material a polyolefin such as polypropylene to which EPDM is added as rubber material, and the wood material grains added to the intermediate layer are kenaf cores with grain diameters of about 3 to 6 mm, and a foaming agent is added to the laminated body to provide the sound insulator with good sound insulating performance and control sounds propagating through solids.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation material and a sound insulation structure used for various structures such as bridges, railroad tracks, and buildings.

[0002]

2. Description of the Related Art In automobile and railroad bridges and highways, a vibration control structure and a sound insulation structure are employed to reduce various vibrations and noises generated when a vehicle passes by. For sound insulation, steel plates having high rigidity and high sound insulation performance, cement asbestos boards, and the like are provided so as to be densely spread. In general, these sound insulation materials are attached to a structural frame such as a girder via a vibration-proof rubber having a predetermined thickness in order to suppress transmission of vibrations to the sound insulation material.

[0003]

However, in such a structure, since a vibration-proof rubber for vibration insulation and a steel plate for sound insulation are provided, the number of mounting steps and the number of mounting parts are large. In addition, a larger space is required in the structure part for vibration isolation and sound insulation.

Therefore, it is an object of the present invention to provide a sound insulation material having sound insulation performance in which the generation of sound caused by vibration is suppressed. Another object is to provide a sound insulating structure using such a sound insulating material.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention provides a pair of base layers composed of a thermoplastic resin material, and a wood material provided between the base layers. A sound insulation material, which is a multilayered body having flexibility and having an intermediate layer composed of a thermoplastic resin material formed into a porous structure with particles added thereto, in which generation of solid-borne sound is suppressed. According to this sound insulating material, since the multilayer body including the pair of base layers and the intermediate layer provided therebetween has flexibility, a bending rigidity smaller than that of a steel plate or the like can be obtained. Further, since the base layers forming a pair have a sandwich structure with an intermediate layer sandwiched therebetween, internal loss with respect to sound and vibration is large. In particular, the intermediate layer is mixed with wood material particles and is formed into a porous structure, so that the internal loss coefficient is increased. Therefore, this sound insulation material is a sound that propagates in the air (hereinafter referred to as air-borne sound).
Sound can be reduced by reducing the sound transmission, and further, the sound and vibration transmitted through the solid can be attenuated, and the generation of the sound caused by the vibration, that is, the generation of the solid propagating sound can be suppressed. Thus, it is possible to suppress the transmission of sound to the outside of the sound insulation material. Further, the sound insulating material according to the present invention is lightweight because the base layer and the intermediate layer forming a pair are composed mainly of a thermoplastic resin material. In particular, the intermediate layer has a low specific gravity due to the fact that the wood material particles are mixed and formed in a porous structure.
Therefore, the sound insulating material has a good sound insulating property and is lightweight.

The invention according to claim 2 is characterized in that a rubber material is added to the base layer. The sound insulating material according to the present invention, when a rubber material is added to the thermoplastic resin material forming the base layer, the bending rigidity is reduced,
Generation of solid-borne sound is suppressed well.

The invention according to claim 3 is a sound insulation structure for suppressing outward transmission of airborne sound generated in a building and solid propagated sound generated by vibration generated in a building. And the sound insulation material according to claim 1 or 2,
A long support, the support is provided at a position where the sound generated from the building is desired to be blocked, and the sound insulating material is arranged such that an end is supported by the support. It is a sound insulation structure characterized by. Since this sound insulation structure is composed of the sound insulation material of the present invention that suppresses the generation of solid-borne sound and has good sound insulation performance, vibrations are transmitted from the support of the sound insulation structure to the sound insulation material. Even with a simple structure, the sound insulation structure has good sound insulation performance. In the present specification, when simply referring to “sound”, air-borne sound and solid-borne sound are not particularly distinguished, and generally sound is generally referred to.

The invention according to claim 4 of the present invention is the sound insulating structure according to claim 3, wherein the seal is provided below the building and seals between the sound insulating material and the support. It is characterized by having a member. In this sound insulation structure, the vibration transmitted to the sound insulation material is reduced by the seal member, and the space between the sound insulation material and the support is sealed,
The downward propagation of solid propagating sound and air propagating sound is well suppressed. In the sound insulating material applied to the sound insulating structure of the present invention, since the internal loss with respect to sound and vibration is large and the generation of solid-borne sound is suppressed, the structure is supported by the support through the seal member. Even if a vibration-proof structure such as a vibration-proof rubber is not provided between the frame and the frame, good sound insulation performance is exhibited.

Further, the invention according to claim 5 of the present invention is
The sound insulating structure according to claim 4, wherein the support is
It is characterized in that it is provided separately from the structural framework of the building. In this sound insulation structure, since the support is provided separately from the structural frame of the building, the degree of freedom in designing the sound insulation structure is high. It is also possible to configure the sound insulation structure in another place and attach it later to a predetermined part of the building.

The invention according to claim 6 of the present invention is the sound-insulating structure according to claim 3, wherein the sound-insulating material is formed in an elongated shape and has the same end edges along the longitudinal direction. Is bent substantially perpendicular to the direction, and the bent end is formed in a shape cut out from the end in the width direction to form a recess into which a part of the support can be inserted. The sound insulation material is a sound insulation structure, wherein the support is arranged in a state where the support is passed through the recess.
In this sound insulating structure, both ends of the sound insulating material along the longitudinal direction are bent, so that the strength against the pressing force from the bent direction is increased. For this reason, for example, it has a structure that can withstand use in a place where there is a possibility of receiving a strong wind, or a portion where wind pressure is applied by a vehicle moving at high speed.

The invention according to claim 7 of the present invention is characterized in that, in the sound insulating structure according to claim 6, the sound insulating material covers the outer surface of the support. In this configuration, the support is not visually recognized from the outside of the building, so that the appearance is improved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. The sound insulation material according to the present invention is a sound insulation structure that has conventionally required a vibration-proof rubber for vibration insulation and a steel plate for sound insulation, etc., which requires a large number of mounting steps, a large number of mounting parts, or a sound insulation structure. It was made to solve the problem that the structure becomes bulky. The applicants have earnestly examined whether there is a material having good vibration insulation and sound insulation properties. as a result,
The inventors have found that a material using so-called wood material particles is effective. Therefore, in the present invention, the inventors have focused on using a material using such woody material particles as a sound insulating material, and have provided a sound insulating material having the following configuration. That is, it has a pair of base layers made of a thermoplastic resin material, and an intermediate layer made of a thermoplastic resin material which is provided between the base layers and is formed into a porous structure while adding wood material particles. It is a multilayered body having flexibility, and is a sound insulation material in which generation of solid-borne sound is suppressed.

Examples of such sound insulation materials 1 and 3 are shown in FIGS. 1 (a) and 1 (b). The thermoplastic resin materials forming the base layers 1a and 3a and the intermediate layers 2 and 4 may be the same or different. The thermoplastic resin materials forming the base layers 1a and 3a and the intermediate layers 2 and 4 are polyolefin, polyolefin-based ionomer, vinyl chloride resin, and
It can be selected from various thermoplastic resin materials such as polyurethane and acrylonitrile butadiene styrene copolymer (ABS), and may be a thermoplastic resin material in which two or more of these resin materials are mixed in various ratios. Preferably, polyolefins such as polyethylene and polypropylene are used.

It is preferable that at least the base layers 1a and 3a contain a rubber material because the bending rigidity of the sound insulation materials 1 and 3 is reduced and the generation of solid-borne sound is reduced. As the rubber material, various natural or synthetic rubber materials can be used. Examples of such rubber materials include butadiene rubber, isoprene rubber, ethylene propylene diene copolymer (EPDM), nitrile rubber (NB
R) or vulcanized products thereof can be used.
For example, when the thermoplastic resin material is a polyolefin resin material, EPDM is preferably used.

The thermoplastic resin material used as the material of the sound insulation materials 1 and 3 may be a new material or may be a waste material such as a vehicle or a building. Specifically, for example, a joint member for a structure, a door opening trim of a vehicle, a sealing member such as a weather strip formed of a mixed material of a thermoplastic elastomer and a thermoplastic resin material is preferable. Particularly preferably, a waste material of a shock absorbing member such as a bumper provides a thermoplastic resin material having a predetermined strength and an excellent vibration absorbing ability. Further, a waste material made of a thermoplastic resin material such as a battery case is also preferable. Various waste rubber materials may be mixed and used with these thermoplastic resin materials.

As the wood material particles mixed in the intermediate layers 2 and 4, particles of various wood materials such as trees and plants can be used. For example, coniferous trees such as cedar and red pine can be used as trees, broad-leaved trees such as oak and cous, and rice straw, straw, hay, kenaf and the like can be used as plants. Further, it is also possible to use a waste material after being used for various purposes such as a building material, or a discarded portion of a bark, a wood scrap, etc. at the time of sawing. It is preferable to use particles having a multi-tubular structure as the wood material particles. Particles having a multi-tubular structure, that is, particles having a plurality of tubular spaces extending substantially parallel to each other, have a hollow portion, so that the specific gravity of the intermediate layer can be favorably reduced. In addition, it is expected that the hollow portion in the wood material particles will improve the sound insulation performance and the internal loss of vibration. As the wood material particles having a multi-tubular structure, various tree trunks, branch chips and crushed products,
It is possible to use chips or crushed products of a core material (core) such as a stem portion of plants, for example, it is preferable to use kenaf, and it is more preferable to use kenaf core crushed products.

The wood material particles are typically obtained by drying and then crushing the wood material. A crushing method that maintains the shape of the wood material structure such as a multi-tubular structure is preferred. The wood material particles may have a chip-like size, but it is preferable that the wood material particles are mixed with a softened or molten thermoplastic resin material to be small enough not to be carbonized.
For this reason, it is preferable that the wood material particles mixed in the thermoplastic resin material have a corresponding diameter of about 3 to 6 mm.

When the mixing ratio of the thermoplastic resin material and the wood material particles in the material constituting the intermediate layers 2 and 4 is 90:10 to 50:50 in weight ratio, a preferable weight reduction is achieved. It is preferable because it is possible to do so and the sound insulation performance is excellent. More preferably, the thermoplastic resin material:
The weight ratio of the wood material is 70:30.

The intermediate layers 2 and 4 have a porous structure. The porous structure may be formed by a hollow portion having an uneven shape, which is formed by introducing air during kneading or the like, or may have a myriad of uniform pores formed by adding a foaming agent and foaming. May be formed by. When the intermediate layers 2 and 4 have a porous structure, it is expected that the intermediate layers 2 and 4 will be lightweight and that the air in the holes will improve the sound insulation performance. Further, the sound insulation materials 1 and 3 can be provided with flexibility. The foaming agent may be an inorganic foaming agent such as sodium hydrogencarbonate or an organic foaming agent such as azodicarbonamide, and is preferably a foaming agent having a thermal decomposition temperature in the range of 180 to 200 ° C. . The mixing ratio of the foaming agent is, for example, 1 to 10% with respect to the total weight of the thermoplastic resin material and the wood material particles.
A degree is preferable.

The thickness of each layer of the sound insulation materials 1 and 3 is as follows.
It can be variously set according to the size of No. 3, required sound insulation performance, performance of reducing solid-borne sound, and the like. For example, the base layer 1a forming a pair is molded from a thermoplastic resin in which EPDM is mixed in polypropylene, and the intermediate layer 2 is made of the same thermoplastic resin with a kenaf core having a diameter of 3 to 6 mm in an amount of 40 parts by weight per 100 parts by weight of the thermoplastic resin. Part, when an azodicarbonamide-based organic foaming agent is molded with a material in which 3 parts by weight are added to the total weight of the thermoplastic resin and the wood material particles, the base layer has a thickness of 2 mm and the intermediate layer has a thickness of 11 mm. By forming the entire structure to have a thickness of 15 mm, the material has a sound insulation performance suitable as a sound insulation material used for a building such as a steel railway bridge, and also has a light weight.

The sound insulation materials 1 and 3 are formed in a plate shape having various shapes and sizes according to the installation site and the installation form. The sound insulating material may be formed in a flat plate shape as shown in FIG. 1 (a), or may be formed in a flat plate shape or a curved plate shape having a bent portion or a curved portion as shown in FIG. 1 (b). Is also good. FIG. 1 (a) shows a flat sound insulating material 1 and FIG. 1 (b) shows a flat sound insulating material 3 with both side edges bent at about 90 °. The sound insulation material is additionally provided with a layer having various functions on the outer surface side of the base layer, such as a design layer forming an outer design, a waterproof film, an antifouling film, and a coating for reinforcing the surface. It may be.

Since the base layer and the intermediate layer forming a pair of the present sound insulating material are made of a material containing a thermoplastic resin, the two base layers and the intermediate layer are easily integrated with each other at the stage of manufacturing the sound insulating material. It is possible to obtain a sound insulation material having a multilayer structure with a small number of steps. Further, as a result, in the construction of the sound insulating structure, there is no risk of separating the base layer and the intermediate layer that form a pair, and since only the sound insulating material needs to be handled, the number of parts is small and the work efficiency is improved.

The sound insulation material according to the present invention can be manufactured by various known methods for manufacturing a laminated body. Typically, the sound insulating material is formed by extrusion molding. The base layer and the intermediate layer, which form a pair, are molded as a single-layer body, and then formed into a multilayer body by welding using a thermoplastic resin material on the surface of each layer or adhering with an adhesive. You can Preferably, a pair of base layers are formed,
Simultaneously with or after the formation of the intermediate layer, the base layer is pressed against both surfaces of the softened intermediate layer, and the intermediate layer and / or the thermoplastic resin material forming the base layer is welded. For a particularly preferable method for producing the sound insulation material, see Japanese Patent Application No. 2000-210022 and Japanese Patent Application No. 2000-21.
No. 0034, Japanese Patent Application No. 2001-142180.

The base layer 1a is formed at the same time when the intermediate layer 2 is molded.
A manufacturing method for welding the above will be described by taking the case of using the apparatus shown in FIG. 2 as an example. The material C of the intermediate layer 2 is
A thermoplastic resin material such as waste material is chopped into small pieces, subdivided by a crushing head, and melted by using frictional heat generated between a blade of a screw while kneading with a screw conveyor or the like. Next, the wood material particles crushed in advance are mixed with the resin material which has started to be melted. When kneading the thermoplastic resin material and mixing with the wood material particles, non-uniform air bubbles are mixed in the material. Then, the material C of the intermediate layer is extruded into a plate shape with a pressure capable of holding the bubbles. In this extrusion, it is preferable to use a pair of pull-out rollers 9 shown in FIG.

Next, the base layers A and B forming a pair are welded to both sides of the material C of the intermediate layer. In the form in which the material C of the intermediate layer shown in FIG. 2 is extruded onto one base layer A, the other base layer B is placed in contact with the upper surface of the intermediate layer C. Then, the base layers A and B forming a pair are sandwiched from both outer sides by rolling rollers or the like and pressed. By this pressing, the intermediate layer is formed (pressed) to have a predetermined thickness and, at the same time, the base layers A and B forming a pair are pressure-bonded.

On the other hand, in the form in which the material C of the intermediate layer shown in FIG. 3 is extruded onto the transfer body 6 such as a conveyor belt, the material C of the intermediate layer of the base layers A and B forming a long pair is formed at substantially the same time. Can be placed in contact with both sides of. As shown in FIG.
The base layers A and B can be brought into contact with the material C of the intermediate layer from the upper and lower sides by the rolling roller 8 at a position where the material C of the intermediate layer is supplied from the end of the transfer body 6. After that, the rolling bases 8 and the like sandwich and press (compress) the base layers A and B from the outer sides of the pair, so that the intermediate layer C and the base layers A and B are welded at the same time. After that, it is formed into a predetermined thickness by a pressure roller, a temperature-controlled roller, a cooling bar, etc., cooled, and cut into a predetermined length, thereby forming a multilayer structure as shown in FIG. 1 (a). The provided sound insulating material 1 is obtained.

That is, in the method for manufacturing the sound insulation material, the first step of preparing the molten resin C by mixing the wood material particles in the melt of the thermoplastic resin forming the intermediate layer 2, and A second step of drawing out as a plate-shaped intermediate layer 2 through a pair of drawing rollers (see FIG. 3) and resin layers A and B constituting a base layer 1a made of a thermoplastic resin are superposed on both surfaces of the intermediate layer 2. In the third step, the resin layers A and B are pressed via a pressing member, the resin layers A and B and the intermediate resin layer C are adhered, and these are cooled and cured,
And a fourth step of obtaining a resin laminate in which the surface resin layers are laminated on both surfaces of the intermediate layer 2 between the pair of base layers 1a. By using this method, the multilayer sound insulating material 1 can be manufactured in one manufacturing line,
With a small number of manufacturing steps, it is possible to obtain a lightweight sound insulation material having good sound insulation performance and suppressing generation of solid-borne sound.

In this manufacturing method, in the first step,
A stirring member that stirs the thermoplastic resin is provided, the thermoplastic resin is made into a melt by using frictional heat generated by stirring the stirring member, and the porosity in which the molten resin holds air inside is stirred by the stirring member. The intermediate layer 2 having a porous structure can be manufactured. Further, in the second step, a plurality of recessed grooves extending in the axial direction are provided on the outer peripheral surface of the drawing roller (not shown), and the molten resin is drawn out through the drawing roller, thereby lowering the intermediate layer at a lower pressure. The resin material C can be extruded, and the intermediate layer formed in a porous structure to which the wood material particles are added without destroying the structure of the wood material particles or destroying the bubbles in the resin material C. 2 can be obtained.

In these manufacturing methods, in the first step, the molten resin may be further mixed with a foaming agent to form the molten resin into a porous structure by the foaming action of the foaming agent. it can. In these manufacturing methods, when the resin laminate obtained in the fourth step further has a fifth step of cooling it through a pair of cooled press members, the resin laminate is solidified before cutting and has a flatness. It is possible to obtain a sound insulating material as a multi-layered body which is high and has reduced shrinkage and distortion. Further, in particular, in the third step, by heating the resin layers A and B constituting the base layer 1a before being laminated on the molten resin C, the resin layers A and B on both sides at the time of pressure bonding and the resin of the intermediate layer The temperature between the material C and the material C can be the same, and the amount of shrinkage after cooling can be the same to obtain a sound insulating material with reduced shrinkage and distortion and improved flatness. For example, in the manufacturing method shown in FIG. 3, the molten resin C is clamped through the resin layers A and B forming the base layer 1a forming a pair at the same temperature at the same time, so that the resin material of the intermediate layer at the time of pressure bonding. The temperature of the bonding surface between C and the resin layers A and B is the same, and thus a sound insulation material having improved planarity can be obtained.

Further, as shown in FIG. 1 (b), the sound insulating material 3 having a shape in which both end portions are bent substantially vertically in the same direction,
It can be formed by using the bending forming means 11 as shown in FIG. The bending and forming means 11 applies the bending and raising member 13 which bends and raises both side ends of the transferred sound insulating material original body D from the lower side and the upper surface of the sound insulating material original body D closer to the center than the both side ends. The pressing member 15 is provided so as to come into contact with the pressing member 15 to prevent the central portion of the sound insulating material body D from bending due to bending and raising. The sound insulating material having the bent portion is formed by pressing the base layers A and B on both sides of the material C of the intermediate layer in the same manner as described above, and then molding the sound insulating material original body D to a predetermined thickness without cooling to obtain a softened state. By bending and molding the sound insulation material body D by the bending and shaping means 11, both edge portions are bent at about 90 °. After that, the thickness of the bent and bent portion is formed, and after cooling, the sound insulating material original body D is cut into a predetermined length to obtain the sound insulating material 3 of FIG. 1 (b).

As described above, in any of the methods preferable for the present sound insulating material, a multilayer body can be efficiently obtained with a small number of steps in any method, and a fixing material such as an adhesive or a fixing or bonding method. The multilayer body can be manufactured without using a member for. In addition, since the bending molding is performed subsequent to the molding of the multilayer body, the efficiently bending-molded sound insulating material can be manufactured with a small number of steps.

For example, as a sound insulating material preferably applied to a steel railway bridge, polypropylene is used as a base layer, and a waste material used for a bumper of a vehicle mainly composed of usual rubber and talc is used as a base material of 15 mm square or less. Subdivide into size,
This is melted and kneaded to a thickness of 2 to 3 mm and a width of 900 to 12
A member extruded in a layer shape of 00 mm can be used.
As the intermediate layer, the same waste material as the base layer is crushed into 15 mm square or smaller resin material, which is kneaded with a screw conveyor and melted, and then kenaf core crushed to a size of 3 to 6 mm is mixed with the resin material. Then, the member can be extruded to a thickness of 12 to 20 mm at a low pressure such that non-uniform bubbles remain inside. In the compression and molding of the intermediate layer, as described above, the above-mentioned base layers heated to about 100 ° C. on both sides are arranged on both sides of the resin material of the intermediate layer to obtain a sound insulation material having the constitution of the present invention. be able to.

Next, an embodiment of a sound insulation structure for a building using the sound insulation material according to the present invention will be described in detail with reference to the drawings. 5 to 10 show a steel railway bridge 20 provided with a sound insulation structure. As shown in FIG. 5, the steel railway bridge 20 includes a structural portion 2 including a frame of the bridge, rails, and the like.
1 is provided. The structure portion 21 has a pair of main girders 23 extending in the extension direction of the steel railway bridge 20 with the width of the steel railway bridge 20. A plurality of auxiliary girders 25 parallel to the main girder 23 are provided between the main girders 23 at equal intervals. A horizontal girder 27 extending in the width direction of the steel railway bridge 20 is provided above the main girder 23. A rail member 24 and the like are laid on the cross girder 27 so that the vehicle can pass therethrough. Also, the structure part 2
A plurality of rows of receiving beams 29 extending along the extension direction of the steel railroad bridge 20 are provided at the lower part of 1. Furthermore, the structure part 2
A column 92 is erected on the side of 1 along the main girder 23,
A column 32 is provided above the main girder 23.

The steel railroad bridge 20 is provided with a sound insulation structure that covers the structure portion 21 from the side to the bottom. The steel railway bridge 20 has a lower sound insulation structure 40 below the steel railway bridge 20.
And a side sound insulation structure 90 on the side. In addition, between the lower end of the side sound insulation structure 90 and the main girder 23, the sound insulation material 5 according to the present invention is formed as a long member having an arc cross section.
And the sound insulating material 3 are densely spread over a sealing member (not shown). Therefore, from the lower sound insulation structure 40 provided up to the main girder 23 to the side sound insulation structure 90, the sound insulation material is densely spread and continuous, and the sound insulation that surrounds the side surface to the lower surface of the structure portion 21. It is formed into a structure. With this configuration, an arcuate appearance is formed, and it looks good from the outside, especially from below. Further, between the upper end of the side structure 90 and the pillar 32 extending from the main girder 23, the sound insulating material 3 is densely spread so that both end edges thereof face downward, and the air propagating sound and solid propagating upward. It is formed in the upper sound insulation structure 100 that suppresses the transmission of sound. Therefore, this steel railway bridge 20
The sound insulation structure provided in is formed in a sound insulation structure that surrounds the entire outside except the central upper portion where the rails and the like of the structure portion 21 are laid, and by passing a train or the like through the steel railway bridge 20. The air-borne sound that is generated and the solid-borne sound that is generated by the passage of a train or the like are less likely to leak to the outside, and are well insulated.

The lower sound-insulating structure 40 ensures that the airborne sound generated in the steel railway bridge 20 or the passing train and the solid-borne sound generated due to the vibration generated in the steel railway bridge 20 are transmitted downward. It is a sound insulation structure to suppress. The lower sound insulation structure 40 is directly fixed to the steel railway bridge 20 by being attached to the receiving beam 29. FIG. 6 is a top view of the lower sound insulation structure 40, and FIG.
FIG. 7 shows the mounting structure of the sound insulating material in No. 0. The lower sound insulation structure 40 is composed of a plurality of flat sound insulation materials 1 shown in FIG.
And the supports 42, 44, and the sound insulation material 1 and the supports 42, 4
4 and a seal member 58 for sealing the space between As shown in FIG. 7 (a), the support body 42 is configured to be capable of supporting the sound insulation materials 1 adjacent to each other along both widthwise edges, and the support body 44 is configured as shown in FIG. 7 (b). The sound insulating material 1 can be supported along one edge in the width direction.

The supports 42 and 44 of this embodiment are the receiving beams 2
It is provided separately from 9, and has pressing members 52 and 55 and supporting members 46 and 49 that are fixedly connected to the receiving beam 29. The support members 46 and 49 and the pressing members 52 and 55 are configured to sandwich the end edges of the sound insulation material 1, respectively.

The structure of the support 42 will be mainly described below. As shown in FIG. 7A, the support member 46 is formed in an elongated shape, and both ends in the width direction are flat plate-shaped sound insulation material receivers 4.
7 is formed. The sound insulating material receiver 47 is a portion that abuts the lower surface side of the end portion of the sound insulating material 1 and supports the sound insulating material 1, and is formed so as to extend parallel to the lower surface of the structural portion 21. The central portion of the support member 46 is formed at a connecting portion 48 that projects above the sound insulation material receiver 47 and is parallel to the sound insulation material receiver 47. Bolt holes are provided in the connecting portion 48 at predetermined intervals in the longitudinal direction.

The pressing member 52 is formed as an elongated member similar to the supporting member 46, and is arranged above the supporting member 46. Both ends in the width direction of the pressing member 52 are formed into a flat plate-shaped sound insulation material pressing member 53. The sound insulation material retainer 53 is a portion that abuts on the upper surface side of the end portion of the sound insulation material 1, and cooperates with the sound insulation material receiver 47 of the support member 46 to sandwich the sound insulation material 1. The central portion of the pressing member 52 is formed in a connecting portion 54 which projects upward from the sound insulating material presser 53 and has an upper surface parallel to the sound insulating material presser 53. Connecting portion 54 of the pressing member 52
Is provided wider than the connecting portion 48 of the support member 46, and the distance between the sound insulation material retainer 53 and the sound insulation material receiver 47 can be changed. Bolt holes are provided in the connecting portion 54 at predetermined intervals in the longitudinal direction so as to face the bolt holes provided in the connecting portion 48 of the support member 46.

The support member 46 has a bolt 60 and a nut 6 on the H steel flange 30 of the receiving beam 29 via the pressing member 52.
It is fixed by 1. Further, as shown in FIG. 6A, the support member 46 and the pressing member 52 are fixed by bolts at a predetermined interval, and the sound insulating material receiver 47 and the sound insulating material pressing member 53 are parallel and fixed. They are connected to each other at intervals.

In the support member 49 of the support body 44 that supports the sound insulation material 1 only at one side edge, a flat sound insulation material receiver 50 is provided only at one side edge as shown in FIG. 7B. The central portion is formed in the connecting portion 51. The edge of the support member 49 on the side where the sound insulating material receiver 50 is not provided is bent vertically downward with respect to the connecting portion 51. Further, the pressing member 55 is provided with a flat plate-shaped sound insulating material presser 56 similar to the pressing member 55 only on the side edge of the support member 49 facing the sound insulating material receiver 50, and the central portion thereof is the connecting portion 57.
Is formed in. In addition, the sound insulation material retainer 5 of the retainer member 55
The edge on the side where 6 is not provided is bent vertically downward with respect to the connecting portion 57. The attachment form of the support member 49 and the pressing member 55 is the same as the support member 46 and the pressing member 52.
Since the configuration is the same as, the detailed description will be omitted.

The seal member 58 is a conventionally well-known member having various kinds of flexibility, typically a member having rubber-like elasticity. The seal member 58 is provided at least between the sound insulation material 1 and the sound insulation material receivers 47, 50 or the sound insulation material retainers 53, 56. Lower sound insulation structure 4 provided below the building
In No. 0, if the seal member 58 is provided at least between the sound insulating material receivers 47 and 50 and the lower surface of the sound insulating material 1, the sound insulating material 1
This is preferable because the self-weight ensures the hermeticity with the supports 42 and 44. More preferably, when it is provided between the sound insulation material 1, the sound insulation material receivers 47 and 50, and the sound insulation material retainers 53 and 56, the vibration transmitted to the sound insulation material 1 is reduced.

The seal member 58 of this embodiment is the sound insulation material 1.
Is formed so as to cover the entire side edge of the sound insulation material 1 and between the sound insulation material 1 and the sound insulation material retainers 53 and 56, and passes through the end of the thick portion of the sound insulation material 1 and the sound insulation material 1 and the sound insulation material receiver. It is formed as a long member having a U-shaped cross section, which covers up to the distance between 47 and 50. The seal member 58 includes the sound insulating material 1, the support 42,
It suffices that the sound insulating material 1 is interposed between the sound insulating material 1 and the sound insulating material 44. In the present embodiment, the seal member 58 is formed in a shape that is engaged and fixed so as to sandwich the end edge of the sound insulation material 1.

The seal member 58 includes the sound insulating material 1 and the support 4.
2, 44, specifically, if the air reservoir is provided between the sound insulating material receiver 47, 50 and / or the sound insulating material retainer 53, 56, the sound and the vibration propagating in the solid are well absorbed. It is possible and preferable. The air reservoir portion is a partially formed space portion, and can be formed in a hole shape or a partially formed air layer shape. In addition, since the seal member 58 is provided with the air reservoir, flexibility can be increased, and sound and vibration propagating in the solid can be absorbed, and
By not hindering the vibration of the sound insulation material 1, it is possible to reduce the generation of solid-borne sound.

The air reservoir of the seal member may be formed by forming an uneven surface, and is formed by closely adhering to the sound insulation material 1, the sound insulation material receivers 47 and 50, or the sound insulation material retainers 53 and 56. May be done. For example, FIG. 9 (a)
A plurality of convex portions 64 are formed at equal intervals on the surface of the seal member 63 that comes into contact with the sound insulation material 1 shown in FIG. In this seal member 63, the protrusion 64 is in close contact with the sound insulation material 1, and the protrusion 6
An air reservoir is formed between the sound insulating material 1 and a portion of the surface other than 4 which does not contact the sound insulating material 1. Further, in the seal member 66 shown in FIG. 9B, a plurality of spherical recesses 67 are formed on the surface contacting the sound insulation material 1. In the seal member 66, the portions other than the recess 67 are in close contact with the sound insulation material 1, and the inside of the recess 67 is formed as an air reservoir. Further, the air reservoir of the seal member 69 may be a hollow portion or the like formed inside. For example, the seal member 69 shown in FIG. 9 (c) is entirely made of a foam molding material, and the air reservoir is formed by the bubbles formed inside the seal member.

Here, the natural frequency of the composite of the seal member and the sound insulation material is preferably 30 Hz or less. When the natural frequency is 30 Hz or less, the frequency is lower than the frequency of noise that is normally generated in a building, so that the sound insulation material and the seal member are well suppressed from resonating.

A sealing member 70 is preferably attached to the edge of the sound insulation material 1 adjacent to the other sound insulation material 1, as shown in FIG. 6B. The sealing member 70 is the seal member 5
Like No. 8, it is composed of a flexible member. Preferably, when it is possible to engage with the edges of both sound insulation materials 1, the sound insulation material 1
It is possible to prevent the sound from leaking downward from the space, and it is possible to absorb and reduce the vibration transmitted to the sound insulation material 1. In the present embodiment, the sealing member 70 has the sound insulating material 1 on both sides.
The long rubber member is provided with the groove 72 that can be engaged with the edge of the rubber member.

The lower sound insulation structure 40 is constructed on the structure portion 21 as follows. First, the support members 46 and 49 and the pressing members 52 and 55 are arranged so that the sound insulating material receiver 4 faces each other.
It is fixed to the receiving beam 29 so that the distance between 7 and 50 is approximately equal to the width of the sound insulation material 1. Further, the seal member 58 is engaged with the edge of the sound insulation material 1 supported by the support members 46 and 49. Next, the supporting members 46, 49 and the pressing member 5
The sound insulating material 1 is supported by the support member 46 through the end edge of the sound insulating material 1 to which the seal member 58 is attached. Then, the sound insulation material 1 is slid along the longitudinal direction of the support member 46 to be arranged at a predetermined position and the sealing member 70 is sandwiched between the sound insulation materials 1. By this work, the sound insulation material 1 is supported by the supports 42 and 44, FIG.
The construction of the lower sound insulation structure 40 as shown in FIG.

At this time, as shown in FIGS. 7A and 7B, the edges of the sound insulation material 1 are sandwiched by the sound insulation material receivers 47, 50 and the sound insulation material retainers 53, 56, respectively. The sound insulating material 1 is stably held by the supports 42 and 44. Further, since it is sandwiched via the seal member 58, the vibration transmitted in the solid, that is, from the support members 46, 49 or the pressing members 53, 56, is applied to the seal member 58.
It is transmitted after being reduced by.
Further, since the sound insulation material 1 has a large internal loss and the generation of solid-borne sound is reduced, the sound transmission to the lower side is also suppressed by being supported by the simple structure for transmitting the vibration. It is the lower sound insulation structure 40. That is, in the lower sound insulation structure 40 of the present embodiment, the sound insulation material 1 can be slid along the supports 42 and 44 provided in the building to be arranged and supported at a predetermined position. No bolt holes are provided in the product, the number of parts is small, and work efficiency is good. Also, it has a simpler configuration.

The supports 42 and 44 may be configured to be supported only by the weight of the sound insulation material, that is, to have no pressing member, but as in this embodiment, the sound insulation material 1 is used.
It is preferable that the support is sandwiched between the supports 42 and 44. In the configuration in which the support body sandwiches the sound insulation material, at least one of the sound insulation material receiver and the sound insulation material retainer is formed so as to abut on the entire edge supported by the support member of the sound insulation material 1. By sliding, the sound insulation can be placed smoothly. Preferably, when the sound insulating material receiving member and the sound insulating material pressing member are formed in a long shape and continuously abutted against the edge of the sound insulating material 1 as in the present embodiment, the sound insulating material is removed. The sound insulation structure can be arranged so as to be favorably supported at a predetermined portion by the slide, and the sound insulation material can be stably sandwiched, and the sound insulation structure has good sound insulation performance.

Further, in this embodiment, the supports 42, 44
Is a sound-insulating material receiver 47 that contacts one surface of the edge of the sound-insulating material 1,
Since it has the support members 46 and 49 provided with 50 and the holding members 52 and 55 provided with the sound insulating material retainers 53 and 56 that come into contact with the other surfaces of the end edges of the sound insulating material 1, the sound insulating material receivers 47 and 50 are provided.
The distance between the sound insulating material retainer 53 and 56 can be adjusted appropriately. Therefore, it is possible to cope with various sound insulating materials by adjusting the distance between the sound insulating material receiving member and the sound insulating material pressing member according to the shape and rigidity of the sound insulating material 1 and the sealing member 58. Further, when the seal member 58 or the like is deteriorated during long-term use, by adjusting this interval, it is possible to reduce the deterioration of the sound insulation performance and extend the service life of the sound insulation material 1 or the seal member 58. That is, the maintenance of the support state of the sound insulating material 1 can be easily performed even after the construction. When the support members 46 and 49 and the pressing members 52 and 55 are integrated by screwing as in the present embodiment, the sound insulating material receiver 4 is provided.
It is preferable because it is easy to adjust the interval between the sound-insulating material presser 53, 56 and the sound-insulating material presser 53, 56.

FIG. 10 shows an example in which sound-insulating material receivers are intermittently provided and the sound-insulating material retainer is formed continuously. The support body 80 includes a sound insulating material receiving member 84 that is a separate body from the support member 82.
And a pressing member 86. Here, the sound insulating material receiving members 84 are formed as block members having an L-shaped cross section that is shorter than the supporting member 82, and are provided at equal intervals along the longitudinal direction of the supporting member 82. Sound insulation material receiving member 84
Are provided so as to be sandwiched together with the sound insulation material 1 between the support member 82 and the sound insulation material presser 87 of the pressing member 86. The sound insulation material 1 is supported by being sandwiched between the sound insulation material retainer 87 and the sound insulation material receiving member 84. Further, between the sound insulation material 1 and the support 80, a seal member 89 provided between the sound insulation material retainer 87 and the sound insulation material 1.
It is sealed by.

The support 4 for supporting the edges of the sound insulation material 1
Various configurations can be adopted for attaching 2, 44 to the receiving beam 29. For example, as shown in FIG. 9A, the support member 74 directly receives the beam 29 by the bolt 75.
The pressing member 77 is formed in the width between the receiving beams 29, is disposed so as to overlap the height of the receiving beams 29, and is integrated with the supporting member 74 by the bolts 78. good. Further, although not particularly shown, the sound insulating material receiving member and the sound insulating material pressing member are not limited to a flat plate shape as long as they are in contact with the upper surface side or the lower surface side of the sound insulating material along the edges of the sound insulating material. Instead, it may have a shape having a curved surface or a shape having a convex portion or a concave portion.

Next, the side sound insulation structure 90 is shown in FIG.
Will be described with reference to. The side sound insulation structure 90 is shown in FIG.
Both edges are bent vertically in the same direction as shown in (b),
The sound insulating material 3 has a U-shaped cross section, a long supporting member 92, and a reinforcing member 94.

The support member 92 is a long member and is provided so as to extend in the height direction of the steel railway bridge 20. In the present embodiment, as shown in FIG.
It is provided on the side of the main girder 23 along the main girder 23.
The spacing between the adjacent support members 92 is arranged to be substantially equal to the length of the sound insulating material 3 in the longitudinal direction. Support member 92
In the present embodiment, is made of H steel, and the flange 92a is fixed so as to extend along the extension direction of the steel railway bridge 20.

As shown in FIG. 8, the sound insulating material 3 has a concave portion 95 cut out from the end portion in the longitudinal direction at both bent edge portions.
Is equipped with. The recess 95 has a shape into which at least part of the support member 92 can be inserted, and can be, for example, a slit-shaped recess or a rectangular recess. In this embodiment,
The support member 92 is formed so that it can be inserted from one end to the center of the extension direction. The recess 95 is formed in the same shape at both end edges of the sound insulation material 3 which are bent and opposed to each other, so that the support member 92 can penetrate between the both end edges of the sound insulation material 3. Further, through-holes 98 through which the wire 97 for fall prevention can be inserted are formed at predetermined intervals at both bent edge portions. Further, a bolt hole for attachment to the support member 92 is formed on the non-bent surface near the recess 95.

The reinforcing member 94 is a member arranged along the bent end of the sound insulation material 3 and near the recess 95, and is provided to firmly fix the sound insulation material 3 to the support member 92. In the present embodiment, the reinforcing member 94 is formed as a plate-shaped member having one end edge bent at a substantially right angle as shown in FIG. The bent one edge of the reinforcing member 94 is a reinforcing portion arranged along the end portion of the sound insulating material 3 where the concave portion 95 is formed, and the other portions are parallel to the central portion of the sound insulating material 3. Is formed on a fixed portion extending to the. The fixed portion of the reinforcing member 94 has a shape that overlaps with the region of the sound insulating material 3 where the bolt hole is formed, and the bolt hole is formed at a corresponding position.

In order to construct the side sound insulation structure 90, first, the support member 92 is fixed to the structure portion 21 at an interval substantially equal to the length of the sound insulation material 3 in the longitudinal direction, and then from the upper end of the support member 92. The flange 92a of the support member 92 is passed through the recess 95 of the sound insulating material 3 to drop the sound insulating material 3 to a predetermined position. At this time, the bent both edges of the sound insulating material 3 are arranged so as to extend to the inside of the steel railway bridge 20, so that the bent edges from the outside are not visually recognized and have a good appearance.

Next, the reinforcing member 94 is arranged inside the bent sound insulating material 3 arranged at a predetermined portion with the flange 92a of the supporting member 92 interposed therebetween, and the sound insulating material 3 and the supporting member 92 are reinforced from the outside. The bolt 99 is fixed through the bolt hole formed in the member 94 and the bolt hole formed in the sound insulation 3 and the reinforcing member 94. By this fixing, the sound insulating material 3 and the reinforcing member 94 are fixed to the supporting member 92, and the reinforcing member 9
4 is a flange 92a on the outer side of the support member 92.
Between the inner flange and the inner flange, and is disposed in the vicinity of the concave portion 95 of the bent edge of the sound insulating material 3. In addition, the wire 97 that is passed through the through hole 98 connects the plurality of sound insulation members 3 to the support member 92.
The supporting member 92 may be passed through the through hole 98 at any time, such as before the supporting member 92 is passed through the recess 95, or after the sound insulation 3 is supported by the supporting member 92. Moreover, a sound absorbing material or the like may be appropriately provided in the concave space sandwiched by the bent both edges of the sound insulating material 3.

In the side sound insulating structure 90, the recess 95 of the sound insulating material 3 is formed so that half of the outside of the support member 92 in the extending direction can be inserted, so that the entire outside of the support member 92 is adjacent to each other. It is completely covered by the sound insulation material 3 and is not visible from the outside. Therefore, the appearance of the sound insulation structure is improved.

Further, by providing a reinforcing member 94 which is fixed to the sound insulating material 3 along the vicinity of the concave portion of the bent end portion of the sound insulating material 3, it is possible to mount the sound insulating material 3 against a pressing force from a direction perpendicular to the sound insulating material 3. The strength is increased. For this reason, for example, the sound insulating material 3 is stably supported by the support member 92 and exhibits good sound insulating performance even when subjected to wind pressure or strong wind generated when a train passes through the steel railway bridge 20. In particular, when the reinforcing member 94 is fixed to both the sound insulating material 3 and the support member 92 as in the present embodiment, the attachment strength against the pressing of the sound insulating material 3 from the vertical direction is further increased, which is preferable.

The mounting structure of the sound insulating material 3 to the support column 92 is not limited to this embodiment. Instead of providing the reinforcing member 94, the supporting member 92 may be directly fixed with a bolt and a nut. Further, it is preferable that the fixing member such as a bolt is not exposed to the outside because the appearance is improved. For example, the reinforcing member 94 is integrally attached to both bent edges of the sound insulating material 3, and the flange 92a of the support member 92 is passed through the groove-shaped portion formed between the reinforcing member 94 and the sound insulating material 3. May be With this configuration, the sound insulating material can be fixed at a predetermined position by sliding, and workability can be improved.

The above-mentioned structure provided as the lower sound-insulating structure 40 is preferably provided below the building, but it may be provided beside or above various buildings. The same applies to the above-described configuration provided as the side sound insulation structure 90, and may be installed below or above various buildings. In addition, as a building, the above-mentioned steel railway bridge 2
In addition to various bridges such as 0, various civil engineering structures such as side structures and top structures of highways, roads and tracks passing through semi-underground, and building structures can be used. And this sound insulation structure can be provided along the outdoor surface of these buildings, or as the structure itself which distinguishes the inside and the outside of the building.

(Example) (i) Measurement of Sound Transmission Loss The base layer was formed by extruding a material in which a waste material of a bumper of a vehicle containing polypropylene as a main component and talc were mixed at a weight ratio of 8: 2. It was molded into a 2 mm layer. The material of the intermediate layer is the same as that of the base layer, in which the waste material of the vehicle bumper containing polypropylene as the main component is melted by friction heat, and then the kenaf crushed product and the thermoplastic resin material containing polypropylene as the main component The waste material of the door trim base material blended in a weight ratio of 1: 1 to the waste material of the bumper is 6:
It was obtained by adding in a weight ratio of 4 and kneading. Then, according to the method described in the above embodiment, the multilayer body according to the present invention was molded by welding the base layer to both sides simultaneously with the molding of the intermediate layer.

A sample obtained by cutting this multilayer body into a size of 900 mm × 1980 mm was placed between the reverberation room and the anechoic room, and a speaker was installed as a sound source on the reverberation room side, and the incident sound energy was omnidirectional. The acoustic transmission loss was obtained by simultaneously measuring the acoustic energy transmitted to the anechoic chamber side by the intensity microphone with the intensity microphone. The result is shown in FIG. Especially, the transmission loss in the frequency band of 250 Hz to 2 kHz, which is the frequency band of noise caused by vibration in steel railway bridges, is about 27 dB to 3 dB.
It was as large as 9 dB, exceeding the mass law (random incidence) shown in the figure, and it was clarified that it was lightweight and had excellent sound insulation performance.

(Ii) Comparative evaluation of solid-borne sound 300 mm of a multilayer body molded by the same method as in (i)
A sample was cut into a size of × 100 mm, and the ends in the longitudinal direction were supported horizontally at a fixed end with a rubber plate having a thickness of 5 mm interposed therebetween and held horizontally. A microphone was placed 200 mm horizontally from the fixed part of the sample and 100 mm below the sample bottom surface. A butyl rubber ball having a diameter of 40 mm was allowed to freely fall from a position 250 mm above the sample, the generated sound was received by a microphone, and the sound pressure level was measured. Thickness used as a sound insulation material with a standard surface weight in conventional side sound insulation structures.
A 6 mm ordinary steel plate was cut into the same size as a comparative sample, and the same test was performed. Results are shown in FIG.

As shown in the figure, in the wide frequency range from 250 Hz to 4 kHz, this sample exhibited a smaller sound than the comparative sample. In particular, at a frequency of 1 kHz or more, a difference of 10 dB or more occurred. From this, it is clear that this sample produces less sound caused by vibration, that is, solid-borne sound, than steel plates, and is suitable for use as a sound insulation material for a building that vibrates. Became.

The multilayer bodies used in Examples (i) and (ii) had a simple average specific gravity of 1.0 and a bending strength of 2.
It had a bending Young's modulus of 4 kN / cm ² and a bending Young's modulus of 290 kN / cm ² , and could withstand construction and use in various structures. In addition, the dimensional change rate due to thermal expansion at 20 to 80 ° C. was 2.6 × 10 ⁻⁵ , which ^proved to be suitable for outdoor use. It also has excellent flame retardancy,
The vehicle met the FMVSS 302 standard for years. Therefore, for example, after being arranged as a sound insulating material in the sound insulating structure 40, 90, 100 as in the above embodiment,
Even if a work such as cutting steel or grinding a rail is performed with sparks, the sound insulating material is not destroyed and good sound insulating performance can be maintained.

[0068]

According to the present invention, the present invention provides a sound-insulating material having sound-insulating performance in which the generation of sound caused by vibration is suppressed, thereby making the sound-insulating structure simpler. be able to.

[Brief description of drawings]

FIG. 1 (a) is a perspective view showing an embodiment of a sound insulation material of the present invention, particularly a sound insulation material suitable for a lower sound insulation structure. FIG. 1 (b) is a perspective view showing an embodiment of the sound insulating material of the present invention, and in particular, it is suitable for a side sound insulating structure.

FIG. 2 is a front view showing an embodiment of an apparatus for manufacturing the sound insulation material of the present invention.

FIG. 3 is a front view showing another embodiment of the apparatus for manufacturing the sound insulation material of the present invention.

FIG. 4 is a perspective view showing a bending forming means for forming a bent portion of the sound insulation material of FIG. 1 (b).

FIG. 5 is a partial cross-sectional view showing a main part of a steel railway bridge which is a building according to an embodiment of the present invention.

6 (a) is a plan view of a lower sound insulation structure of the steel railway bridge of FIG. FIG.6 (b) is sectional drawing which shows the sealing structure between sound-insulating materials.

7 (a) and 7 (b) are cross-sectional views showing how a sound insulating material is supported by a support member in the lower sound insulating structure of the steel railway bridge of FIG.

8 is a perspective view showing a side sound insulation structure of the side sound insulation structure of the steel railway bridge of FIG. 5;

9 (a) to 9 (c) are cross-sectional views showing another embodiment of a support of a lower sound insulation structure and a seal member.

FIG. 10 is a cross-sectional view showing another embodiment of the support of the lower sound insulation structure.

FIG. 11 is a graph showing measurement results of sound transmission loss.

FIG. 12 is a graph showing the results of an evaluation test of solid-borne sound.

[Explanation of symbols]

1,3,5 sound insulation 1a, 3a base layer 2,4 Middle layer 9 Drawer roller 11 Bending forming means 13 Bending and raising member 15 Presser member A, B base layer C Intermediate layer resin material D Sound insulation material 20 steel railway bridge 21 Structure 23 main girder 24 Rail member 25 auxiliary digits 27 horizontal girders 29 Receiving beam 30 flange 32 props 40 Lower sound insulation structure 42,44,80 support 46, 49, 74, 82, 92 support members 47,50 Sound insulation material receiver 48,51 connection 48a, 51a bolt holes 52,55,77,86 Holding member 53,56,87 Sound insulation material retainer 54,57 connecting part 54a, 57a bolt holes 58, 63, 66, 69, 89 Seal member 60,75,78,99 Volts 61 nuts 64 convex 67 recess 70 Sealing member 72 groove 84 Sound insulation material receiving member 90 Side sound insulation structure 92a flange 94 Reinforcement member 95 recess 97 wires 98 through holes 100 upper sound insulation structure

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) E04B 1/80 G10K 11/16 D G10K 11/16 (71) Applicant 592173124 Tokyo Steel Bone Bridge Tokyo 4-18-32 Shibaura, Minato-ku (72) Inventor Kazushi Yanase, 25, Uetoike, Yoshihara-cho, Toyota-shi, Aichi Araco Co., Ltd. (72) Inori, Norinari, 25, Kamifuji-ike, Yoshihara-cho, Aichi, Ara Co., Ltd. In-company (72) Inventor Kazuyoshi Iida 3-1-1 Ogawahigashi-cho, Kodaira-shi, Tokyo Incorporated in Bridgestone (72) Inventor Kiyotaka Kaneko 1-6-19-804 Seijo, Setagaya-ku, Tokyo (72) Invention Kimio Shigehara 8-23-3-408 Kameido, Koto-ku, Tokyo (72) Inventor Sadao Nomoto 2-9-8 Okamoto, Kamakura-shi, Kanagawa (72) Inventor Masaaki Hoshikawa 4-18 Shibaura, Minato-ku, Tokyo 32 Inside the Tokyo Steel Bridge (72) Inventor Noriaki Inaba 4-18-32 Shibaura, Minato-ku, Tokyo F Term inside the Tokyo Steel Bridge (Reference) 2D001 AA01 AA05 BA02 BB01 BB02 CA01 CB01 CD02 2D059 AA13 BB37 GG01 GG12 GG25 2E001 DF02 FA00 FA30 GA47 HD03 HD08 HD13 HE01 JC01 4F100 AK01A AK01B AK01C AK07 AN00A AN00B AP00C AP01 AT00D BA03 BA04 BA05 BA06 BA07 BA10A BA10B BA10D BA15 CB00E DD02D DE01C DJ01C DJ10C GB07 GB90 JB16A JB16B JB16C JH01 JH02 JK17C JL16 5D061 AA07 AA25 AA40 BB24

Claims (7)

[Claims] 1. A pair of base layers made of a thermoplastic resin material, and an intermediate layer which is provided between the base layers and which is made of a thermoplastic resin material formed into a porous structure while adding wood material particles. And a sound insulating material which is a multilayered body having flexibility and in which generation of solid-borne sound is suppressed. 2. The sound insulating material according to claim 1, wherein a rubber material is added to the base layer. 3. A sound insulation structure for suppressing outward transmission of air-borne sound generated in a building and solid-borne sound generated by vibration generated in a building, the sound insulating structure according to claim 1 or 2. It has a sound insulation material according to claim 1 and a long-sized support, the support is provided at a position where it is desired to block the sound generated from the building, and the sound insulation is supported at the end by the support. A sound insulation structure characterized by being arranged and arranged. 4. The sound insulation structure according to claim 3, further comprising a seal member provided below the building and sealing a space between the sound insulation material and the support. . 5. The sound insulation structure according to claim 4, wherein the support is provided separately from the structural frame of the building. 6. The sound insulation structure according to claim 3, wherein the sound insulation material is formed in a long shape, and both end edges along the longitudinal direction are bent substantially perpendicularly in the same direction, and , The bent end portion is formed in a shape notched from the end portion in the width direction to form a recess into which a part of the support body can be inserted, A sound insulation structure, wherein the sound insulation structure is arranged so as to pass through the recess. 7. The sound insulating structure according to claim 6, wherein the sound insulating material covers the outer surface of the support.