JP4024272B2 - Sound insulation plate, structure using the same, and member constituting the same - Google Patents

Description

  The present invention relates to a sound insulating plate that blocks sound by elastic repulsion, a structure using the sound insulating plate, and a member constituting the sound insulating plate.

  Conventionally, a material having a large mass, such as concrete or an iron plate, is effective for sound insulation. The sound blocking effect by this method has a property of deteriorating as the frequency decreases according to the mass law. In order to solve such problems, as a sound blocking technique by elasticity, when a film or plate is formed into a dome shape or an arch shape and the periphery of the formed film or plate is fixed, the film or plate is surfaced by sound pressure. There is known one that generates an elastic action due to internal expansion and contraction, and blocks and absorbs sound by this elastic effect (see, for example, Patent Document 1).

International Publication No. WO2004 / 107313 Pamphlet

  However, as described in Patent Document 1, in the sound insulation technique using the elastic action of the curved plate, the force due to the sound pressure is concentrated on the surrounding frame, so that the sound insulation effect deteriorates due to the flexural vibration of the reinforcing material as the size increases. Becomes remarkable. In addition, a phase difference depending on the location is likely to occur in the sound pressure applied to the plate, and it is difficult to obtain sound insulation by an elastic action.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is dependent on the sound pressure applied to the plate member without depending on the surrounding support. It is an object of the present invention to provide a sound insulating plate that blocks sound by elastic action due to in-plane expansion and contraction of a plate member even when a phase difference occurs, a structure using the sound insulating plate, and a member constituting the sound insulating plate.

In order to solve the above-mentioned problem, the invention according to claim 1 fixes a plate member formed in a shape having a curvature such as an arch shape or a dome shape, and an edge of a portion having the curvature of the plate member at both ends. A sound insulating plate composed of at least one beam, and a primary resonance frequency [Young's modulus / {density · (curvature radius) ² }] ^1/2 / (2 × The radius of curvature of the plate member is set so that the (circumferential ratio) is higher than the frequency of the sound to be cut off or within the audible frequency band, and the level of the sound pressure applied to the plate member sandwiched between the beams The distance between the beams is set so that the phase difference is within 90 °, the bending deformation of the plate member is suppressed, and the sound is blocked by the in-plane elastic action of the plate member.

According to a second aspect of the present invention, in the sound insulating plate according to the first aspect, the beam is fixed to a curved surface having a minimum curvature radius among the curved surfaces having the curvature of the plate member.

The invention according to claim 3 is a sound insulating plate comprising a plate member formed in a shape having a curvature such as an arch shape or a dome shape, and at least one reinforcing member joined to the plate member, wherein the plate member is curved. Primary resonance frequency [Young's modulus / {density · (radius of curvature) ² }] ^1/2 / (2 × circumference) of the in-plane expansion / contraction mode acting in the direction The curvature radius of the plate member is set so as to be higher than the frequency of the sound to be played, and the interval between the reinforcement members is set so that the phase difference of the sound pressure applied to the plate member sandwiched between the reinforcement members is within 90 ° In addition, the convex curved surface or concave curved surface of the reinforcing material formed in the arch shape is joined to the portion having the curvature of the plate member to suppress the bending deformation of the plate member and to block the sound by the in-plane elastic action of the plate member. is there.

According to a fourth aspect of the present invention, in the sound insulating plate according to the third aspect , the reinforcing member is joined to a curved surface having a minimum curvature radius among the curved surfaces having the curvature of the plate member.

The invention according to claim 5 is the sound insulating plate according to claim 3 or 4 , wherein the end of the reinforcing material is processed into a T-shape or L-shape, the end is bent, or the end A rod-shaped member is joined to

The invention according to claim 6 is the sound insulating plate according to claim 3, 4 or 5 , wherein a through hole is formed in the reinforcing material.

The invention according to claim 7 is a sound insulating plate comprising a plate member formed into a shape having a curvature such as an arch shape or a dome shape, and a reinforcing frame formed in a lattice shape or a honeycomb shape joined to the plate member. The primary resonance frequency [Young's modulus / {density · (radius of curvature) ² }] ^1/2 / (2 × circumference) in the in-plane expansion / contraction mode acting in the bending direction of the plate member is within the audible frequency band. Alternatively, the radius of curvature of the plate member is set so as to be higher than the frequency of the sound to be blocked, and the phase difference of the sound pressure applied to the plate member surrounded by the opening of the reinforcing frame is within 90 °. so as to set the opening size of the reinforcing frame, the convex surface or the concave surface of the reinforcing frame formed arched bonded to sites having a curvature of the plate member, the and the plate member suppresses bending deformation of the plate member Sound is blocked by in-plane elastic action.

According to an eighth aspect of the present invention, in the sound insulating plate according to the seventh aspect , the reinforcing frame is joined to a curved surface having the smallest curvature radius among the curved surfaces having the curvature of the plate member.

The invention according to claim 9 is the sound insulation board according to claim 7 or 8 , wherein the end of the reinforcing frame is processed into a T-shape or L-shape, the end is bent, or the end A rod-shaped member is joined to

The invention according to claim 10 is the sound insulating plate according to claim 7, 8 or 9 , wherein a through hole is formed in the reinforcing frame.

According to an eleventh aspect of the present invention, in the sound insulating plate according to any one of the first to tenth aspects, the periphery of the plate member is fixed to a peripheral fixing frame.

The invention according to claim 12 uses a member such as a wall or a housing that requires sound insulation or absorption using the sound insulating plate according to any one of claims 1 to 11 , and these members. Structures such as automobiles, aircraft, buildings, machines, and electrical equipment.

According to the first, third, and seventh aspects of the invention, it is possible to suppress bending deformation of the plate member even when a phase difference depending on the location occurs in the sound pressure applied to the plate member without depending on the surrounding support. The sound can be blocked by the elastic action due to the in-plane expansion and contraction of the plate member.
In addition, since the phase difference of the sound pressure applied to the plate member is within 90 °, it is possible to suppress the deterioration of the sound insulation performance due to the phase difference.

According to the inventions according to claims 2 , 4, and 8 , the beam, the reinforcing material, or the reinforcing frame is fixed to the curved surface having the smallest curvature radius among the curved surfaces having the curvature of the plate member. Can be obtained.

According to the invention which concerns on Claim 5 , 9 , the amount of bending of a reinforcing material or a reinforcement frame can be decreased, and deterioration of a sound-insulation effect can be suppressed.

According to the invention which concerns on Claim 6 , 10 , weight reduction can be achieved by forming a through-hole in a reinforcing material or a reinforcement frame.

According to the invention which concerns on Claim 11 , deterioration of the sound insulation effect accompanying the lack of intensity | strength of a surrounding fixing frame can be prevented.

According to the invention which concerns on Claim 12 , in a structure, such as a motor vehicle, an aircraft, a building, a machine, an electric equipment, and the member which comprises it, an effective sound-insulation effect is acquired.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIGS. 1 to 7 are views showing first to seventh embodiments of the sound insulating plate according to the present invention, FIG. 8 is a perspective view of a modified example of the reinforcing material and the reinforcing frame, and FIG. 9 is a reinforcing material and the reinforcing frame. FIG. 10 is a view showing a sound insulating plate when a peripheral fixing frame is used.

  As shown in FIG. 1, the first embodiment of the sound insulating plate according to the present invention includes a plate member 1 formed in a shape having an arch-like curvature, and a curved edge portion 1 a having a curvature of the plate member 1, It consists of the beam 2 which fixes both ends 2a and 2b to 1b. As a fixing method, adhesion or welding may be used, or mechanical fixing may be performed by screws or fittings. Further, the plate member 1 and the beam 2 may be formed by integral molding. As the plate member 1, a plastic plate such as acrylic or polyethylene terephthalate, a metal plate such as aluminum, a veneer plate, or the like is used. The material of the beam 2 may be plastic or metal.

The radius of curvature of the arch-shaped plate member 1 is the primary in the in-plane expansion / contraction mode that acts in the bending direction of the plate member 1 so that the plate member 1 blocks sound by the in-plane elastic expansion / contraction action by sound pressure. The resonance frequency [Young's modulus / {density · (curvature radius) ² }] ^1/2 / (2 × circumference) is set to be higher than the frequency of the sound to be cut off.

  Moreover, it is desirable that the two edges 1a and 1b of the plate member 1 fixed to both ends 2a and 2b of the beam 2 are portions that form a minimum curvature radius on the curved surface of the plate member 1 having a curvature. . In the case of the plate member 1 formed in an arch shape, the minimum curvature formed by the two edges 1a and 1b of the plate member 1 whose set radius of curvature is fixed to both ends 2a and 2b of the beam 2 is shown. Will match the radius. Further, even when a phase difference occurs in the sound pressure applied to the plate member 1, the installation interval of the beams 2 is set so that the phase difference of the sound pressure is within 90 ° at the edge of the plate member 1 sandwiched between the beams 2. Is set.

  By fixing the curved edge with the beam 2, the bending deformation of the plate member 1 can be suppressed and the sound can be blocked by the elastic action due to the in-plane expansion and contraction of the plate member 1. Further, the beam 2 is not attached obliquely with respect to the bending direction of the plate member 1, but the smallest radius of curvature is formed in the curved surface of the plate member 1 along the bending direction and having a curvature as shown in FIG. The sound insulation effect is improved by attaching to the curved edges 1a and 1b. Further, even when a phase difference depending on the location occurs in the sound pressure applied to the plate member 1, the beam 2 has a phase difference of 90 ° or less at the edge of the plate member 1 sandwiched between the beams 2. By setting the installation interval, it is possible to suppress the deterioration of the sound insulation performance due to the phase difference.

  As shown in FIG. 2, the second embodiment of the sound insulating plate according to the present invention is uniformly joined to the arch-shaped plate member 11 formed into a shape having a predetermined curvature and the concave curved surface of the plate member 11. The reinforcing material 12 is made of. The reinforcing member 12 is formed in a substantially semicircular shape, and an upper portion 12 a that is convex and formed in an arch shape is joined to the concave curved surface of the plate member 11. As a fixing method by joining, adhesion or welding may be used, or mechanical fixing may be performed by screws or fittings. Further, the plate member 1 and the reinforcing material 12 may be formed by integral molding. As the plate member 11, a plastic plate such as acrylic or polyethylene terephthalate, a metal plate such as aluminum, a veneer plate, or the like is used. The material of the reinforcing material 12 may be plastic or metal.

The radius of curvature of the arch-shaped plate member 11 is the primary in the in-plane expansion / contraction mode that acts in the bending direction of the plate member 11 so that the plate member 11 blocks sound by the in-plane elastic expansion / contraction action caused by the sound pressure. The resonance frequency [Young's modulus / {density · (curvature radius) ² }] ^1/2 / (2 × circumference) is set to be higher than the frequency of the sound to be cut off.

  Further, the two edge portions 11a and 11b of the plate member 11 fixed to the both ends 12b and 12c of the reinforcing member 12 may be portions that form the minimum curvature radius among the curved surfaces of the plate member 11 having a curvature. desirable. In the case of the plate member 11 formed in an arch shape, the set radius of curvature is the minimum formed by the two edges 11a and 11b of the plate member 11 fixed to the both ends 12b and 12c of the reinforcing member 12. It will coincide with the radius of curvature. In addition, even when a phase difference occurs in the sound pressure applied to the plate member 11, the installation interval of the reinforcing material 12 is set so that the phase difference of the sound pressure is within 90 ° at the portion 13 sandwiched by the reinforcing material 12. ing.

  Further, since the bending of the reinforcing material 12 causes the sound insulation effect to deteriorate, as shown in FIG. 8A, the bottom portion 12d of the reinforcing material 12 is processed so that the cross-sectional shape is T-shaped, The amount of deflection can be reduced. Further, as shown in FIG. 8 (b), the bottom 12d of the reinforcing member 12 may be processed so that the cross-sectional shape is L-shaped, and the bottom of the reinforcing member 12 is shown in FIG. 8 (c). 12d may be bent, and as shown in FIG. 8 (d), another member (square bar member) 12f may be joined to the side portion 12e of the bottom portion 12d of the reinforcing member 12, both of which are reinforced. The amount of bending of the material 12 can be reduced.

  Furthermore, as shown in FIG. 9A, if a perforated reinforcing material 15 in which a through hole 14 is processed into a side portion 15a is used instead of the reinforcing material 12, the weight can be reduced. Furthermore, if the shape of the hole is circular, it is possible to suppress bending due to strength deterioration of the reinforcing material itself.

  In this way, by bending the curved edge portions 11a and 11b forming the smallest radius of curvature among the curved surfaces of the plate member 11 having curvature with the five reinforcing members 12 and 15, bending deformation of the plate member 11 is achieved. The sound can be blocked by the elastic action caused by the suppression and the in-plane expansion and contraction of the plate member 11. Further, even when a phase difference depending on the location occurs in the sound pressure applied to the plate member 11, the reinforcing member 12 is set so that the phase difference of the sound pressure is within 90 ° in the portion 13 surrounded by the reinforcing members 12 and 15. , 15 can be set to suppress the deterioration of the sound insulation performance due to the phase difference.

  As shown in FIG. 3, the third embodiment of the sound insulating plate according to the present invention is uniformly joined to the arch-shaped plate member 21 formed into a shape having a predetermined curvature and the convex curved surface of the plate member 21. The reinforcing material 22 is made of. The reinforcing member 22 is joined to the curved surface of the plate member 21 at an upper portion 22a that is concave and formed in an arch shape. As a fixing method by joining, adhesion or welding may be used, or mechanical fixing may be performed by screws or fittings. Further, the plate member 1 and the reinforcing material 22 may be formed by integral molding. As the plate member 21, a plastic plate such as acrylic or polyethylene terephthalate, a metal plate such as aluminum, a veneer plate, or the like is used. The material of the reinforcing member 22 may be plastic or metal.

The radius of curvature of the arch-shaped plate member 21 is the primary in the in-plane expansion / contraction mode that acts in the bending direction of the plate member 21 so that the plate member 21 blocks sound by the in-plane elastic expansion / contraction action by sound pressure. The resonance frequency [Young's modulus / {density · (curvature radius) ² }] ^1/2 / (2 × circumference) is set to be higher than the frequency of the sound to be cut off.

  In addition, the two edge portions 21a and 21b of the plate member 21 fixed to both ends 22b and 22c of the reinforcing member 22 may be portions that form the minimum curvature radius among the curved surfaces of the plate member 21 having curvature. desirable. In the case of the plate member 21 formed in an arch shape, the set radius of curvature is the minimum formed by the two edges 21 a and 21 b of the plate member 21 fixed to the both ends 22 b and 22 c of the reinforcing member 22. It will coincide with the radius of curvature. Further, even when a phase difference occurs in the sound pressure applied to the plate member 21, the installation interval of the reinforcing material 22 is set so that the phase difference of the sound pressure is within 90 ° in the portion 23 surrounded by the reinforcing material 22. ing.

  Further, since the bending of the reinforcing material 22 causes deterioration of the sound insulation effect, as shown in FIG. 8 (a), the bottom 22d of the reinforcing material 22 is processed so that the cross-sectional shape becomes T-shaped, The amount of deflection can be reduced. Further, as shown in FIG. 8 (b), the bottom 22d of the reinforcing member 22 may be processed so that the cross-sectional shape is L-shaped, and the bottom of the reinforcing member 22 is shown in FIG. 8 (c). 22d may be bent, and as shown in FIG. 8D, another member (square bar member) 22f may be joined to the side portion 22e of the bottom portion 22d of the reinforcing member 22, both of which are reinforced. The amount of bending of the material 22 can be reduced.

  Furthermore, as shown in FIG. 9B, if a perforated reinforcing material 25 in which a circular through hole 24 is processed into a side portion 25a is used instead of the reinforcing material 22, weight reduction can be achieved while suppressing deterioration in strength. Can do. Further, even if the shape of the through-hole is changed to a shape such as an ellipse or a rectangle having a major axis in a direction in which a force is applied, there is an effect of suppressing strength deterioration.

  By fixing the curved edge with the reinforcing members 22 and 25, the bending deformation of the plate member 21 can be suppressed, and the sound can be blocked by the elastic action due to the in-plane expansion and contraction of the plate member 21. In addition, the reinforcing members 22 and 25 are not attached obliquely to the bending direction of the plate member 1, but the minimum curvature radius among the curved surfaces of the plate member 1 along the bending direction and having a curvature as shown in FIG. The sound insulation effect is improved by attaching to the curved edge portions 21a and 21b that form the shape. Further, even when a phase difference depending on the location occurs in the sound pressure applied to the plate member 21, the reinforcing member 22 is set so that the phase difference of the sound pressure is within 90 ° at the portion 23 sandwiched between the reinforcing members 22 and 25. , 25 is set, the sound insulation performance deterioration due to the phase difference can be suppressed.

  As shown in FIG. 4, the fourth embodiment of the sound insulating plate according to the present invention is an arch-shaped plate member 31 formed into a shape having a predetermined curvature, and a rectangular shape joined to the concave curved surface of the plate member 31. The reinforcing frame 32. The reinforcing frame 32 is configured by connecting a reinforcing member 33 having the same shape as the reinforcing member 12 shown in FIG. 2 with a connecting member 34. The upper portion 33a of the reinforcing member 33 formed in a convex shape and an arch shape and the connecting member. An upper portion 34 a of 34 is joined to the concave curved surface of the plate member 31. As the plate member 31, a plastic plate such as acrylic or polyethylene terephthalate, a metal plate such as aluminum, a veneer plate, or the like is used. The material of the reinforcing frame 32 may be plastic or metal. In addition, as the reinforcing material 33, a reinforcing frame can be configured using the same shape as the reinforcing material 22 shown in FIG. In addition to the reinforcing frame 32, a sound insulating plate can also be configured using a polygonal reinforcing frame such as a honeycomb.

The radius of curvature of the arch-shaped plate member 31 is the primary in the in-plane expansion / contraction mode that acts in the bending direction of the plate member 31 so that the plate member 31 blocks sound by the in-plane elastic expansion / contraction action by sound pressure. The resonance frequency [Young's modulus / {density · (curvature radius) ² }] ^1/2 / (2 × circumference) is set to be higher than the frequency of the sound to be cut off.

  In addition, the two edge portions 31a and 31b of the plate member 31 fixed to both ends 33b and 33c of the reinforcing member 33 may be portions that form the minimum curvature radius among the curved surfaces of the plate member 31 having curvature. desirable. In the case of the plate member 31 formed in an arch shape, the minimum radius formed by the two edges 31a and 31b of the plate member 31 whose set radius of curvature is fixed to both ends 33b and 33c of each reinforcing member 33. Will be the same as the radius of curvature. Further, even when a phase difference occurs in the sound pressure applied to the plate member 31, the reinforcement is performed so that the phase difference of the sound pressure is within 90 ° at a portion (opening) 35 surrounded by the reinforcing member 33 and the connecting member 34. An installation interval between the material 33 and the connecting member 34 is set.

  Further, the bending of each reinforcing member 33 constituting the reinforcing frame 32 causes the sound insulation effect to deteriorate, so that the bottom portion of the reinforcing member 33 has a T-shaped cross section as shown in FIG. The amount of bending can be reduced by processing 33d. Further, as shown in FIG. 8 (b), the bottom 33d of the reinforcing member 33 may be processed so that the cross-sectional shape is L-shaped. As shown in FIG. 8 (c), the bottom of the reinforcing member 33 is formed. As shown in FIG. 8D, another member (square bar member) 33f may be joined to the side portion 33e of the bottom 33d of the reinforcing member 33 as shown in FIG. The amount of bending of the reinforcing member 33 constituting the frame 32 can be reduced.

  Further, instead of the reinforcing member 33, as shown in FIG. 9A, if the reinforcing frame 32 is formed by using the perforated reinforcing member 37 obtained by processing the circular through hole 36 into the side portion 37a, the strength deterioration is caused. The weight can be reduced while suppressing. Even when the reinforcing frame is configured by using the reinforcing member 33 having the same shape as that of the reinforcing member 22 shown in FIG. 3, as shown in FIG. 9B, the circular through hole 24 is formed in the side portion 25a. If the reinforcing frame is formed using the processed perforated reinforcing material 25, weight reduction can be achieved while suppressing deterioration in strength. Further, even if the shape of the through-hole is changed to a shape such as an ellipse or a rectangle having a major axis in a direction in which a force is applied, there is an effect of suppressing strength deterioration.

  Thus, by fixing the edge portions 31a and 31b of the curved surface forming the minimum curvature radius among the curved surfaces of the plate member 31 having a curvature by the reinforcing member 33 and the connecting member 34 constituting the reinforcing frame 32, The bending deformation of the plate member 31 can be suppressed, and the sound can be blocked by the elastic action due to the in-plane expansion and contraction of the plate member 31. Furthermore, even when a phase difference depending on the location occurs in the sound pressure applied to the plate member 31, the phase difference of the sound pressure is within 90 ° at the portion (opening) 35 surrounded by the reinforcing member 33 and the connecting member 34. As described above, by setting the installation interval between the reinforcing member 33 and the connecting member 34, it is possible to suppress the deterioration of the sound insulation performance due to the phase difference.

  As shown in FIG. 5, the fifth embodiment of the sound insulating plate according to the present invention is joined to a circular and dome-shaped plate member 41 formed into a shape having a predetermined curvature, and a concave curved surface of the plate member 41. It consists of a reinforcing frame 42. The reinforcing frame 42 is formed in a dome shape by radially arranging reinforcing members 43 having substantially the same shape as the reinforcing member 12 shown in FIG. An upper portion 43 a of the reinforcing material 43 that is convex and formed in an arch shape is joined to the concave curved surface of the plate member 41. As a fixing method by joining, adhesion or welding may be used, or mechanical fixing may be performed by screws or fittings. Further, the plate member 41 and the reinforcing frame 42 may be formed by integral molding. As the plate member 41, a plastic plate such as acrylic or polyethylene terephthalate, a metal plate such as aluminum, a veneer plate, or the like is used. The material of the reinforcing frame 42 may be plastic or metal.

The radius of curvature of the circular and dome-shaped plate member 41 is an in-plane expansion / contraction mode that acts in the bending direction of the plate member 41 so that the plate member 41 blocks sound by in-plane elastic expansion / contraction due to sound pressure. The primary resonance frequency [Young's modulus / {density · (curvature radius) ² }] ^1/2 / (2 × circumference) is set to be higher than the frequency of the sound to be cut off.

  Further, the two edge portions 41a and 41b of the plate member 41 fixed to both ends 43b and 43c of the reinforcing members 43 constituting the reinforcing frame 42 have a minimum curvature radius among the curved surfaces of the plate member 41 having a curvature. The site to be formed is desirable. In addition, even when a phase difference occurs in the sound pressure applied to the plate member 41, the installation interval of the reinforcing material 43 is set so that the phase difference of the sound pressure is within 90 ° in the portion 44 surrounded by the reinforcing material 43. ing.

  In addition, the bending of each reinforcing member 43 constituting the reinforcing frame 42 causes deterioration of the sound insulation effect, so that the bottom of the reinforcing member 43 has a T-shaped cross section as shown in FIG. 43d can be processed to reduce the amount of deflection. Further, as shown in FIG. 8 (b), the bottom 43d of the reinforcing member 43 may be processed so that the cross-sectional shape is L-shaped. As shown in FIG. 8 (c), the bottom of the reinforcing member 43 is processed. 43d may be bent, and as shown in FIG. 8D, another member (square bar member) 43f may be joined to the side portion 43e of the bottom portion 43d of the reinforcing member 43, both of which are reinforced. The amount of bending of the reinforcing member 43 constituting the frame 42 can be reduced.

  Further, instead of the reinforcing member 43, as shown in FIG. 9A, if the reinforcing frame 42 is formed by using the perforated reinforcing member 46 in which the circular through hole 45 is processed into the side portion 46a, the strength deterioration is caused. The weight can be reduced while suppressing. Further, even if the shape of the through-hole is changed to a shape such as an ellipse or a rectangle having a major axis in a direction in which a force is applied, there is an effect of suppressing strength deterioration.

  In this way, by fixing the edge portions 41a and 41b of the curved surface forming the smallest radius of curvature among the curved surfaces of the plate member 41 having a curvature with the reinforcing members 43 constituting the reinforcing frame 42, the plate member 41 is fixed. The sound can be blocked by the elastic action caused by the in-plane expansion and contraction of the plate member 41. Further, even when a phase difference depending on the location occurs in the sound pressure applied to the plate member 41, the reinforcement member 43 is installed so that the phase difference of the sound pressure is within 90 ° in the portion 44 surrounded by the reinforcement member 43. By setting the interval, it is possible to suppress the deterioration of the sound insulation performance due to the phase difference.

  In the sixth embodiment of the sound insulating plate according to the present invention, as shown in FIG. 6, a circular dome-shaped plate member 51 formed into a shape having a predetermined curvature and a concave curved surface of the plate member 51 are joined. It consists of a reinforcing frame 52. The reinforcing frame 52 is formed in a dome shape by arranging reinforcing members 53 having substantially the same shape as the reinforcing member 12 shown in FIG. An upper portion 53 a of each reinforcing member 53 that is convex and formed in an arch shape is joined to the concave curved surface of the plate member 51. As a fixing method by joining, adhesion or welding may be used, or mechanical fixing may be performed by screws or fittings. Further, the plate member 51 and the reinforcing frame 52 may be formed by integral molding. As the plate member 51, a plastic plate such as acrylic or polyethylene terephthalate, a metal plate such as aluminum, a veneer plate, or the like is used. The material of the reinforcing frame 52 may be plastic or metal.

The radius of curvature of the circular and dome-shaped plate member 51 is such that the plate member 51 has an in-plane expansion / contraction mode that acts in the bending direction of the plate member 51 so that the plate member 51 blocks sound by in-plane elastic expansion / contraction due to sound pressure. The primary resonance frequency [Young's modulus / {density · (curvature radius) ² }] ^1/2 / (2 × circumference) is set to be higher than the frequency of the sound to be cut off.

  Further, the two edge portions 51a and 51b of the plate member 51 fixed to both ends 53b and 53c of the reinforcing members 53 constituting the reinforcing frame 52 have a minimum curvature radius among the curved surfaces of the plate member 51 having a curvature. The site to be formed is desirable. Further, even when a phase difference occurs in the sound pressure applied to the plate member 51, the installation interval of the reinforcing material 53 is set so that the phase difference of the sound pressure is within 90 ° in the portion 54 surrounded by the reinforcing material 53. ing.

  Further, since the bending of each reinforcing member 53 constituting the reinforcing frame 52 causes deterioration of the sound insulation effect, the bottom of the reinforcing member 53 has a T-shaped cross section as shown in FIG. The amount of bending can be reduced by processing 53d. Further, as shown in FIG. 8 (b), the bottom 53d of the reinforcing member 53 may be processed so that the cross-sectional shape is L-shaped, and the bottom of the reinforcing member 53 is shown in FIG. 8 (c). 53d may be bent, and as shown in FIG. 8 (d), another member (square bar-like member) may be joined to the side portion 53e of the bottom 53d of the reinforcing member 53, both of which are reinforcing frames. The amount of bending of the reinforcing material 53 that constitutes 52 can be reduced.

  Further, instead of the reinforcing material 53, as shown in FIG. 9A, if the reinforcing frame 52 is formed by using the perforated reinforcing material 56 in which the circular through hole 55 is processed into the side portion 56a, the strength deterioration is caused. The weight can be reduced while suppressing. Further, even if the shape of the through-hole is changed to a shape such as an ellipse or a rectangle having a major axis in a direction in which a force is applied, there is an effect of suppressing strength deterioration.

  In this way, by fixing the edge portions 51 a and 51 b of the curved surface forming the minimum radius of curvature among the curved surfaces of the plate member 51 having a curvature, the plate member 51 is fixed by the reinforcing members 53 constituting the reinforcing frame 52. The sound can be blocked by the elastic action caused by the in-plane expansion and contraction of the plate member 51. Further, even when a phase difference depending on the location occurs in the sound pressure applied to the plate member 51, the reinforcement member 53 is installed so that the phase difference of the sound pressure is within 90 ° in the portion 54 surrounded by the reinforcement member 53. By setting the interval, it is possible to suppress the deterioration of the sound insulation performance due to the phase difference.

  As shown in FIG. 7, the seventh embodiment of the sound insulating plate according to the present invention is joined to an elliptical, dome-shaped plate member 61 formed into a shape having a predetermined curvature, and a concave curved surface of the plate member 61. The reinforcing material 62 is made of. The five reinforcing members 62 are each formed in a substantially semicircular shape, and an upper portion 62 a that is convex and formed in an arch shape is joined to the concave curved surface of the plate member 61. As a fixing method by joining, adhesion or welding may be used, or mechanical fixing may be performed by screws or fittings. Further, the plate member 61 and the reinforcing material 62 may be formed by integral molding. As the plate member 61, a plastic plate such as acrylic or polyethylene terephthalate, a metal plate such as aluminum, a veneer plate, or the like is used. The material of the reinforcing material 62 may be plastic or metal.

The curvature radius of the oval and dome-shaped plate member 61 has an in-plane expansion / contraction mode that acts in the bending direction of the plate member 61 so that the plate member 61 blocks sound by elastic expansion / contraction action in the plane by sound pressure. Primary resonance frequency [Young's modulus / {density · (radius of curvature) ² }] ^1/2 / (2 × circumference) is set to be higher than the frequency of the sound to be blocked. .

  In addition, the two edge portions 6a and 61b of the plate member 61 fixed to both ends 62b and 62c of the reinforcing member 62 may be portions that form the minimum curvature radius among the curved surfaces of the plate member 61 having curvature. desirable. In addition, even when a phase difference occurs in the sound pressure applied to the plate member 61, the installation interval of the reinforcing material 62 is set so that the phase difference of the sound pressure is within 90 ° in the portion 63 surrounded by the reinforcing material 62. ing.

  Further, since the bending of the reinforcing material 62 causes the sound insulation effect to deteriorate, as shown in FIG. 8A, the bottom 62d of the reinforcing material 62 is processed so that the cross-sectional shape becomes a T shape, The amount of deflection can be reduced. Further, as shown in FIG. 8 (b), the bottom 62d of the reinforcing member 62 may be processed so that the cross-sectional shape is L-shaped, and the bottom of the reinforcing member 62 is shown in FIG. 8 (c). 62d may be bent, and as shown in FIG. 8 (d), another member (square bar-like member) may be joined to the side portion 62e of the bottom 62d of the reinforcing member 62, both of which are reinforcing members. The amount of deflection of 62 can be reduced.

  Furthermore, as shown in FIG. 9A, if a perforated reinforcing material 65 in which a circular through hole 64 is processed into a side portion 65a is used instead of the reinforcing material 62, weight reduction can be achieved while suppressing deterioration in strength. Can do. Further, even if the shape of the through-hole is changed to a shape such as an ellipse or a rectangle having a major axis in a direction in which a force is applied, there is an effect of suppressing strength deterioration.

  In this way, by bending the curved edge portions 61a and 61b forming the smallest curvature radius among the curved surfaces of the plate member 61 having curvature with the five reinforcing members 62 and 65, bending deformation of the plate member 61 is achieved. The sound can be blocked by the elastic action caused by the suppression and the in-plane expansion and contraction of the plate member 61. Further, even when a phase difference depending on the location occurs in the sound pressure applied to the plate member 61, the reinforcing material 62 is set so that the phase difference of the sound pressure is within 90 ° in the portion 63 surrounded by the reinforcing materials 62 and 65. , 65 is set, the deterioration of the sound insulation performance due to the phase difference can be suppressed.

  Further, as shown in FIG. 10A, when the edge of the plate member 71 having a curvature is fixed by the peripheral fixing frame 72, the beam, the reinforcing material, or the reinforcing frame is attached to the plate member 71 and the peripheral fixing frame 72. If joined, deterioration of the sound insulation effect due to insufficient strength of the peripheral fixing frame 72 can be prevented. 10B and 10C show a case where the reinforcing frame 32 shown in FIG. 4 is joined to the plate member 71 and the peripheral fixed frame 72. FIG.

  A sound insulation board according to the present invention, a structure in which the sound insulation board is attached to a portion from which sound is emitted, and a member constituting the structure are used for vehicles such as automobiles, trains, airplanes, ships, and other transport equipment (vehicles), panels, partitions. Further, the present invention can be applied to all structures that require sound blocking / absorption, such as building materials, sound insulation walls, sound insulation walls, buildings, rooms, electrical equipment, machinery, and sound equipment, and members that constitute the same.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the sound insulation board which concerns on this invention, (a) is a front view, (b) is a side view, (c) is a rear view, (d) is a perspective view of a beam. It is a figure which shows 2nd Embodiment of the sound insulation board which concerns on this invention, (a) is a front view, (b) is a side view, (c) is a rear view, (d) is a perspective view of a reinforcing material. It is a figure which shows 3rd Embodiment of the sound insulation board which concerns on this invention, (a) is a front view, (b) is a side view, (c) is a rear view, (d) is a perspective view of a reinforcing material. It is a figure which shows 4th Embodiment of the sound insulation board which concerns on this invention, (a) is a front view, (b) is the sectional view on the AA line of (a), (c) is a rear view, (d) is a rear view. Partial perspective view of reinforcement frame It is a figure which shows 5th Embodiment of the sound insulation board which concerns on this invention, (a) is a front view, (b) is a rear view, (c) is BB sectional drawing of (b). It is a figure which shows 6th Embodiment of the sound-insulating board which concerns on this invention, (a) is a front view, (b) is a rear view, (c) is CC sectional view taken on the line of (b). It is a figure which shows 7th Embodiment of the sound insulation board which concerns on this invention, (a) is a front view, (b) is a rear view, (c) is DD sectional view taken on the line of (b). It is a perspective view of the modification of a reinforcing material and a reinforcement frame, (a) is T-shaped processing, (b) is L-shaped processing, (c) is bending processing, (d) is joining rod-shaped members It is a side view of the modification of a reinforcing material and a reinforcement frame, (a) is a perspective view of a convex perforated reinforcing material, (b) A perspective view of a concave perforated reinforcing material It is a figure which shows the sound insulation board at the time of using a surrounding fixed frame, (a) is a front view, (b) is the EE sectional view taken on the line (a), (c) is a rear view.

Explanation of symbols

  1, 11, 21, 31, 41, 51, 61 ... plate member, 1a, 1b ... edge, 2 ... beam, 2a, 2b ... both ends, 12, 22, 33, 43, 53, 62 ... reinforcing material, 14 , 36, 45, 55, 64 ... through holes, 32, 42, 52 ... reinforcing frames.

Claims (12)

A sound insulation plate comprising a plate member formed in a shape having a curvature such as an arch shape or a dome shape, and at least one beam for fixing an edge of a portion having the curvature of the plate member at both ends, The primary resonance frequency [Young's modulus / {density · (radius of curvature) ² }] ^1/2 / (2 × circumference) of the in-plane expansion / contraction mode acting in the bending direction of The radius of curvature of the plate member is set so as to be higher than the frequency of the target sound, and the interval of the beams is set so that the phase difference of the sound pressure applied to the plate member sandwiched between the beams is within 90 °. and sound insulation plate, characterized in that to block the sound by plane elastic action of and the plate member suppresses bending deformation of the plate member. 2. The sound insulating board according to claim 1, wherein the beam is fixed to a curved surface having a minimum curvature radius among curved surfaces having the curvature of the plate member. An in-plane expansion / contraction mode which is a sound insulating plate made of a plate member formed into a shape having a curvature such as an arch shape or a dome shape and at least one reinforcing material joined to the plate member, and which acts in the bending direction of the plate member The primary resonance frequency [Young's modulus / {density · (radius of curvature) ² }] ^1/2 / (2 × circumference) is higher than the frequency of the sound to be cut off or within the audible frequency band. Reinforcement formed in an arch shape by setting the radius of curvature of the plate member and setting the interval of the reinforcement member so that the phase difference of the sound pressure applied to the plate member sandwiched between the reinforcement members is within 90 ° A sound insulating board characterized in that a convex curved surface or a concave curved surface of a material is joined to a portion having a curvature of a plate member to suppress bending deformation of the plate member and to block sound by an in-plane elastic action of the plate member. 4. The sound insulating board according to claim 3 , wherein the reinforcing member is joined to a curved surface having a minimum radius of curvature among the curved surfaces having the curvature of the plate member. The sound insulation board according to claim 3 or 4 , wherein the end portion of the reinforcing material is processed into a T-shape or an L-shape, the end portion is bent, or a rod-like member is joined to the end portion. A characteristic sound insulation board. The sound insulating board according to claim 3, 4 or 5 , wherein a through hole is formed in the reinforcing material. A sound insulating plate comprising a plate member formed into a shape having a curvature such as an arch shape or a dome shape, and a reinforcing frame formed in a lattice shape or a honeycomb shape to be joined to the plate member, and in a bending direction of the plate member The primary resonance frequency [Young's modulus / {density · (radius of curvature) ² }] ^1/2 / (2 × circumference) of the in-plane expansion / contraction mode to be operated is within the audible frequency band or the sound to be cut off. The radius of curvature of the plate member is set to be higher than the frequency of the opening of the reinforcing frame so that the phase difference of the sound pressure applied to the plate member surrounded by the opening of the reinforcing frame is within 90 °. Set the dimensions and join the convex curved surface or concave curved surface of the arch-shaped reinforcing frame to the part with the curvature of the plate member to suppress the bending deformation of the plate member and cut off the sound by the in-plane elastic action of the plate member A sound insulation board characterized by that. 8. The sound insulating board according to claim 7 , wherein the reinforcing frame is joined to a curved surface having a minimum curvature radius among curved surfaces having the curvature of the plate member. The sound insulation board according to claim 7 or 8 , wherein the end of the reinforcing frame is processed into a T-shape or an L-shape, the end is bent, or a rod-like member is joined to the end. A characteristic sound insulation board. 10. The sound insulating board according to claim 7, 8 or 9 , wherein a through hole is formed in the reinforcing frame. The sound insulation board according to any one of claims 1 to 10 , wherein a periphery of the plate member is fixed to a peripheral fixing frame. A member such as a wall or a case that requires sound insulation or absorption using the sound insulation plate according to any one of claims 1 to 11 , and an automobile, an aircraft, a building, or a machine using these members , Structures such as electrical equipment.