JP2006030228A - Sound insulating member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulating member which maintains excellent sound insulation property even when pressure of liquid is applied. <P>SOLUTION: The plate-like sound insulating member 1 used in liquid has a 1st space 3 which is provided in the sound insulating member 1 on one side along the thickness and formed in such a shape that the section of a plane perpendicular to the length becomes wider from one side to the other side along the width and a 2nd space 5 which is provided in the sound insulating member 1 on the other side along the thickness and formed in such a shape that the section of a plane of perpendicular to the length becomes wider from the other side to one side along the width, at least a portion of the 1st space 3 and at least a portion of the 2nd space 5 being put one over the other when viewed from the thickness direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sound insulating member, and more particularly, to a member for insulating sound in a liquid having a high pressure.

  Conventionally, as a sound insulation plate used in water, a structure in which rubber or the like is laminated to provide a space inside (for example, refer to Patent Document 1), or a structure in which closed cell rubber or a plastic honeycomb is disposed in the space. The thing (for example, refer patent document 2 and patent document 3) is known.

  Here, the principle of the sound insulation board used underwater is demonstrated.

  Sound is transmitted when the medium vibrates, but part of the sound is reflected at the boundary between the media having different properties.

  For example, if an iron plate is submerged in water and a sound wave is generated at one location in the water, the sound wave reaches the iron plate, and a part of the sound wave is reflected at the boundary between the iron plate and water, and the other part is It travels through the iron plate using the iron plate as a medium.

  If the reflectance (reflection coefficient) of the sound wave at the iron plate is large, the sound wave is reflected at the boundary between water and the iron plate and hardly enters the iron plate, and therefore the iron plate acts as a sound insulation plate. It will be.

  On the other hand, assuming that the reflectance of the sound wave at the iron plate is small, the sound wave enters the iron plate, and therefore the iron plate does not act as a sound insulation plate.

  Whether or not the reflectance of the sound wave at the boundary of each medium having different properties depends on the value of the product ρc of the density ρ of each medium and the sound velocity c in each medium. The greater the difference (ratio) between the values of the product ρc, the higher the reflectance. The product ρc is a physical constant representing the properties of a sound wave transmission medium, and the product ρc may be referred to as a specific acoustic resistance.

For example, since the density ρ _w of water is about 1 g / cm ³ and the sound velocity c _{w in} water is about 1500 m / sec, the acoustic resistance ρ _w c _w is about 1500 (unit is omitted). Become. The density [rho _r of rubber (e.g. urethane rubber) is about 1.5 g / cm ^3, the acoustic velocity _{c r} in the rubber, since it is about 2000 m / sec, the acoustic resistance [rho _r c _r is, Approximately 3000 (the unit is omitted). The ratio r _w between the acoustic resistance ρ _r c _{r of the} rubber and the acoustic resistance ρ _w c _w of the water is about 2.

Meanwhile, the density [rho _a air is about ^{1.13 × 10 -3 g / cm 3} , the speed of sound _{c a} in the air, because it is about 330 m / sec, the acoustic resistance _[rho a _{c a} is about 3.73 × ^{10 -2} (units omitted) becomes, the ratio _{r a} of the acoustic resistance _[rho a _{c a} of the acoustic resistance [rho _w c _w of the water air, to about 4.02 × 10 ⁴ Become.

  Therefore, the boundary between rubber and air reflects far more sound than the boundary between rubber and water. Furthermore, it can be said that rubber acts as a good sound insulation member in the air, but is not suitable as a sound insulation member in water.

The conventional sound insulating plate is provided with a space filled with air or the like in the rubber, paying attention to the high sound reflectance at the boundary between rubber and air.
JP 2001-166679 A JP-A-8-160965 JP-A-8-294980

  By the way, when the conventional sound insulation plate described in Patent Document 1 is installed deep in water, a part of the space in the sound insulation plate is crushed by high pressure in water, and one inner wall of the space (the above-mentioned There is a case where one inner wall in the thickness direction of the sound insulating plate and the other inner wall of the space (the other inner wall in the thickness direction of the sound insulating plate) are in contact with each other at, for example, the central portion of the space.

  Thus, when the part where the inner walls are in contact with each other is formed, there is no problem in the contact part between the inner walls, so that there is no air, so that sound waves are easily transmitted and the sound insulation property of the sound insulation plate is hindered. is there.

  Further, in the conventional sound insulation board described in Patent Document 2, since closed-cell rubber is provided in the space, even if pressure is applied in water, the space is different from that in the conventional sound insulation board described in Patent Document 1. Although there is little possibility that the inner walls will come into contact with each other, since the closed cell rubber is provided, the reflectance of the sound wave is lower than when the space is formed only with air. Note that when the closed cell rubber in the space is compressed by the pressure in water, the reflectance of the sound wave may be further reduced.

  Further, in the conventional sound insulation board described in Patent 3, since a plastic honeycomb is provided in the space, even if pressure is applied in water, the space is similar to the conventional sound insulation board described in Patent Document 2. There is no risk that the inner walls will contact each other, but the reflectance of the sound wave is lower than when the sound wave passes through the honeycomb and a space is formed only by air.

  The present invention has been made in view of the above problems, and provides a sound insulation member that can maintain good sound insulation even when the pressure of the liquid is applied, in a sound insulation member used in a liquid. For the purpose.

  According to the first aspect of the present invention, in the sound insulation member used in a liquid, the first space provided on one side of the sound insulation member inside the sound insulation member, and the inside of the sound insulation member, the A second space provided on the other side of the sound insulation member and spaced apart from the first space with an internal partition wall present in the sound insulation member interposed therebetween. When viewed from the direction in which one side of the sound insulation member and the other side of the sound insulation member are connected to each other, at least a part of the first space and at least a part of the second space overlap each other. The first partition formed between the outside of the sound insulation member and the first space on the one side is bent inward of the sound insulation member by the pressure of the liquid outside the sound insulation member. The first partition and the internal partition are mutually The first contact portion is formed by touching, and is formed between the outside of the sound insulating member and the second space on the other side by the pressure of the liquid outside the sound insulating member. The second partition wall is bent inward of the sound insulation member, and the second partition wall and the internal partition wall are in contact with each other to form a second contact portion. When viewed from a direction connecting one side and the other side of the sound insulating member to each other, the first contact portion and the second contact portion are the first space and the second space, respectively. Exist within a range where they overlap each other, and until the pressure of the liquid outside the sound insulation member reaches a predetermined pressure, the first contact portion and the second contact portion are The sound insulation member is formed at different places.

  According to a second aspect of the present invention, in the sound insulating member according to the first aspect, the outer shape of the sound insulating member is formed in a flat plate shape, and the first space is one of the sound insulating members in the thickness direction. The second space is formed so as to extend along an end surface in the thickness direction of the sound insulation member, and the second space is an end surface in the thickness direction of the sound insulation member on the other side in the thickness direction of the sound insulation member. It is the sound insulation member formed spreading along.

  According to a third aspect of the present invention, in the sound insulating member according to the second aspect, in the first contact portion that is formed until the pressure of the liquid outside the sound insulating member reaches the predetermined pressure. The thickness of the first space is thinner than the thickness of the first space in a portion other than the portion where the first contact portion is formed, and the pressure of the liquid outside the sound insulation member is The thickness of the second space in the second contact portion that is formed until the pressure of a predetermined size is reached is the second space in a portion other than the portion where the second contact portion is formed. It is the sound insulation member which is thinner than the thickness of

  According to a fourth aspect of the present invention, in the sound insulating member according to any one of the first to third aspects, the pressure of the liquid outside the sound insulating member is formed until the predetermined pressure is reached. A first reinforcing member for forming a portion other than the first contact portion to be formed in the first space, and the pressure of the liquid outside the sound insulating member is a pressure of the predetermined magnitude. It is a sound insulation member provided with the 2nd reinforcement member for forming parts other than the 2nd contact part formed until it becomes in the 2nd space.

  The invention according to claim 5 is the sound insulation member according to claim 4, wherein the reinforcing member is a member having a function as a connection member for connecting the sound insulation members to each other.

  The invention according to claim 6 is a flat sound insulation member used in a liquid, and extends in the width direction of the sound insulation member inside the sound insulation member and on one side in the thickness direction of the sound insulation member. The sound insulation member is provided extending in the length direction, and a cross section by a plane perpendicular to the length direction becomes wider from one side in the width direction of the sound insulation member toward the other side. A first space formed in such a shape, and a length direction of the sound insulation member that extends in the width direction of the sound insulation member on the other side in the thickness direction of the sound insulation member inside the sound insulation member And the cross section of the plane perpendicular to the length direction is directed from the other side in the width direction of the sound insulation member toward the one side. Therefore, it is formed in a shape that widens A sound insulation member having at least a part of the first space and at least a part of the second space when viewed from the thickness direction of the sound insulation member. .

  The invention according to claim 7 is the sound insulating member according to claim 6, wherein an end portion of the first space located on the other side in the width direction of the sound insulating member, the vicinity of the end portion, Or it is a sound insulation member by which the reinforcement member is provided in the edge part of the width direction of the said sound insulation member.

  The invention according to claim 8 is the sound insulation member according to any one of claims 1 to 7, wherein the meat portion of the sound insulation member is made of a polymer compound such as synthetic resin or rubber. It is a member.

  The invention according to claim 9 is a flat sound insulation member used in a liquid, wherein the sound insulation member extends in the width direction of the sound insulation member and extends in the length direction of the sound insulation member inside the sound insulation member. The sound insulation member is made of metal, and the overall specific gravity of the sound insulation member is substantially equal to or slightly larger than the specific gravity of the liquid. It is a sound insulation member.

  According to a tenth aspect of the present invention, in the sound insulating member used in a liquid, a plurality of spaces are provided inside the sound insulating member, and one side of the sound insulating member and the other side of the sound insulating member. When viewed from the direction connecting each other, at least a part of each space overlaps each other, and due to the pressure of the liquid outside the sound insulation member, each space is deformed, and a part of the inner wall of each space is Contact portions are formed in contact with each other, and when viewed from the direction in which one side of the sound insulation member and the other side of the sound insulation member are connected to each other, the contact portions are formed in the spaces. Are formed in the overlapping range, and the respective spaces are covered so as to cover the entire overlapping range until the pressure of the liquid outside the sound insulation member reaches a predetermined pressure. One of A sound insulating member that non-contact portion of the space is present.

  According to the present invention, in the sound insulation member used in the liquid, even if the pressure of the liquid is applied, it is possible to maintain a good sound insulation.

[First embodiment]
FIG. 1 is a diagram showing a schematic configuration of a sound insulation member 1 according to the first embodiment of the present invention, FIG. 2 is a diagram showing an arrow II in FIG. 1, and FIG. 3 is IIIA in FIG. It is a figure which shows -IIIB cross section.

  The sound insulation member 1 is used in liquids such as seawater, lake water, and river water. In this embodiment, the case where it is used in seawater will be described as an example.

  The external shape of the sound insulating member 1 is, for example, rectangular and formed in a flat plate shape, and the meat portion (material portion) of the sound insulating member 1 is a synthetic resin (for example, acrylic, polyethylene), rubber that does not allow liquid to pass through. (For example, neoprene rubber, silicon rubber) and the like, and the sound insulation member 1 includes a first space 3 and a second space 5 containing a gas such as air. Is provided.

  The first space 3 is provided, for example, so as to extend in a plate shape along the end surface of the sound insulation member 1 in the thickness direction on one side of the sound insulation member 1 in the thickness direction. The second space 5 is also provided on the other side in the thickness direction of the sound insulation member 1 so as to extend in a plate shape along the end surface in the thickness direction of the sound insulation member 1.

  The second space 5 is in a state of being separated from the first space 3 with an internal partition wall 7 existing inside the sound insulating member 1 in between (in communication with the first space 3). Is provided).

  Then, when viewed from the direction in which the one side of the sound insulation member 1 and the other side of the sound insulation member 1 are connected to each other (thickness direction of the sound insulation member 1), in the range indicated by reference numeral 17 in FIG. A part of the first space 3 and a part of the second space 5 overlap each other.

  The entire first space 3 and the entire second space 5 may be configured to overlap each other (see FIG. 4 and FIG. 5), or one of the first spaces 3. The part and the whole of the second space 5 may be configured to overlap each other. That is, at least a part of the first space 3 and at least a part of the second space 5 may be configured to overlap each other.

  When the sound insulation member 1 is installed deep in seawater, the pressure of seawater outside the sound insulation member 1 causes the outside of the sound insulation member on the one side (one side in the thickness direction of the sound insulation member 1). The first partition wall 9 formed between the first space 3 and the first partition wall 3 is bent inside the sound insulating member 1 as indicated by a broken line in FIG. A part of the inner partition 7 is in contact with each other to form the first contact portion 11.

  Further, a second partition wall 13 formed between the outside of the sound insulating member 1 and the second space 5 on the other side (the other side in the thickness direction of the sound insulating member 1) includes the sound insulating member. The inner wall of the member 1 is bent as shown by a broken line in FIG. 3 so that a part of the second partition wall 13 and a part of the inner partition wall 7 are in contact with each other to form a second contact portion 15. It has become.

  In addition, when viewed from the direction in which one side of the sound insulating member 1 and the other side of the sound insulating member 1 are connected to each other (the thickness direction of the sound insulating member 1), the first contact portion 11 and the first The second contact portion 15 exists in a range 17 where the first space 3 and the second space 5 overlap each other, and the seawater pressure outside the sound insulation member 1 is a predetermined level. Until the pressure is reached, the first contact portion 11 and the second contact portion 15 are formed at different locations (see FIGS. 2 and 3).

  Further, in a state before the sound insulation member 1 is installed in a deep place in seawater, that is, in a state where no large pressure is applied to the outside of the sound insulation member 1 and the sound insulation member 1 is not deformed, the first The thickness of the first space 3 in the contact portion 11 (thickness in the thickness direction of the sound insulating member 1) is the first space in the portion 19 other than the portion where the first contact portion is formed. It is thinner than the thickness of 3 (thickness in the thickness direction of the sound insulation member 1). That is, the thickness T3 is thinner than the thickness T1 shown in FIG.

  Similarly to the case of the first space 3, the thickness of the second space 5 (thickness in the thickness direction of the sound insulation member 1) in the second contact portion 15 is the second space. It is thinner than the thickness of the second space 5 (the thickness in the thickness direction of the sound insulation member) in the portion 21 other than where the contact portion is formed. That is, the thickness T7 is thinner than the thickness T5 shown in FIG.

  Here, the form of each of the spaces 3 and 5 will be described in more detail with an example.

  As shown in FIG. 3, the first space 3 extends in the width direction of the sound insulation member 1 on one side in the thickness direction of the sound insulation member 1 and extends in the length direction of the sound insulation member 1. The sound insulation member 1 is stretched and thinly formed in the thickness direction.

  In addition, the cross section of the first space 3 (a cross section by a plane perpendicular to the length direction of the sound insulation member 1) gradually becomes wider from one side in the width direction of the sound insulation member 1 to the other side. It is formed in such a triangular shape.

  The second space 5 extends in the width direction of the sound insulation member 1 on the other side in the thickness direction of the sound insulation member 1 and extends in the length direction of the sound insulation member 1, so that the sound insulation member 1 is formed so as to be thin in the thickness direction.

  Further, the cross section of the second space 5 (a cross section by a plane perpendicular to the length direction of the sound insulation member 1) gradually becomes wider from the other side in the width direction of the sound insulation member 1 toward one side. It is formed in such a triangular shape.

  Furthermore, when viewed from the thickness direction of the sound insulating member 1, a part of the first space 3 and a part of the second space 5 overlap each other (see reference numeral 17 in FIG. 2).

  More specifically, as shown in FIG. 3, in the cross-sectional shape of the first space 3, the first corner is a slightly smaller angle than the right angle, and the second corner is a small acute angle. It is formed in a right triangle shape. In addition, one short side sandwiching the right angle is located near the other end face in the width direction of the sound insulating member 1 (positioned to be parallel to the end face), and the other sandwiching the right angle. The long side is parallel to one surface of the sound insulating member 1 in the thickness direction, and the second small corner is located near one surface of the sound insulating member 1 in the width direction. .

  Similarly to the cross-sectional shape of the first space 3, the cross-sectional shape of the second space 5 is such that the first corner is slightly smaller than a right angle and the second corner is a small acute angle. It is formed in a right triangle shape. Further, one short side sandwiching the right angle is located near one end face in the width direction of the sound insulating member 1 (positioned to be parallel to the end face), and the other sandwiching the right angle. The long side is parallel to the other surface of the sound insulating member 1 in the thickness direction, and the second small corner is located near the other surface of the sound insulating member 1 in the width direction. Yes.

  Further, since the first space 3 and the second space 5 are formed and arranged as described above, the hypotenuse of the triangular cross section of the first space 3 and the second space are arranged. 5 are parallel to each other, and an internal partition wall 7 that partitions the first space 3 and the second space 5 is formed between the oblique sides. Has been.

  As described above, when viewed from the thickness direction of the sound insulating member 1, FIG. 4 (a diagram showing another arrangement of the internal space in the sound insulating member, corresponding to the section taken along the line IIIA-IIIB in FIG. As shown in the figure, all of the first space 3 and all of the second space 5 may overlap each other. Furthermore, a part of the first space 3 and the whole of the second space 5 may overlap each other.

  Further, as shown in FIG. 5 (a view showing another arrangement form of the internal space in the sound insulation member and corresponding to the cross section taken along the line IIIA-IIIB in FIG. 1), the cross-sectional shape of the first space 3 is the sound insulation The distance from the other side in the width direction of the member 1 to the vicinity of the end portion on one side in the width direction of the sound insulating member 1 gradually increases toward the one side, and the sound insulating member 1 Between the vicinity of the end portion on one side in the width direction to the end portion on one side in the width direction of the sound insulating member 1, a triangular shape may be formed so as to be abruptly narrowed. Further, the second space 5 may be formed in the same shape as the first space 3.

  In addition, although each space 3 and 5 shown in FIGS. 3-5 is a uniform shape in the length direction of the said sound insulation member 1, it does not necessarily need to be a uniform shape, The said sound insulation member 1 The shape may be appropriately changed in the length direction.

  By the way, as shown in FIG. 3, the sound insulation member 1 includes a first reinforcing member (for example, a metal or other rigid member) for forming a portion 19 other than the first contact portion 11 in the first space 3. Reinforcing members made up of each other member) 23 are provided.

  The first reinforcing member 23 is provided at the end of the first space 3 located on the other side in the width direction of the sound insulating member 1 and extending in the thickness direction of the sound insulating member 1. ing. Further, the width of the first reinforcing member 23 (the width in the same direction as the width of the sound insulating member 1) is narrow, and therefore the first reinforcing member has a cross section perpendicular to the thickness direction of the sound insulating member 1. The cross section of 23 is formed small.

  In addition, the said reinforcement member 23 may be provided continuously in the length direction of the said sound insulation member 1, and may be provided intermittently at intervals.

  The sound insulation member 1 includes a second reinforcement member 25 similar to the first reinforcement member 23 in order to form a portion 21 other than the second contact portion 15 in the second space 5. The second space 5 is provided at an end located on one side in the width direction of the sound insulating member 1.

  In addition, as shown in FIG. 6 (the figure which shows the other installation form of a reinforcement member), the said 1st reinforcement member 23 is the other side of the width direction of the said sound insulation member 1 of the said 1st space 3. As shown in FIG. You may be provided in the vicinity of the located edge part.

  That is, for example, it may be provided in the first space 3 as indicated by PS1 or at the end in the width direction of the sound insulating member 1 as indicated by PS5. Further, the second reinforcing member 25 may also be installed at a position indicated by PS3 or PS7, similarly to the first reinforcing member 23.

  Further, when each of the reinforcing members 23 and 25 is provided at an end portion in the width direction of the sound insulating member 1 as indicated by PS5 or PS7, each of the reinforcing members 23 and 25 is connected to the thickness of the sound insulating member 1. Each of the reinforcing members 23 and 25 may be provided with a function as a connecting member for connecting the sound insulating members 1 to each other by the extended portion.

  That is, the sound insulation members 1 may be connected to each other by bringing the reinforcing members 23 and 25 into contact with each other and facing each other and fixing the extended portions with fasteners such as bolts.

  Also in the sound insulation member shown in FIGS. 4 and 5, reinforcing members 23 and 25 may be installed in the same manner as the sound insulation member 1 shown in FIGS. 3 and 6.

  According to the sound insulation member 1, when viewed from the direction in which one side of the sound insulation member 1 and the other side of the sound insulation member 1 are connected to each other (for example, the thickness direction of the sound insulation member 1), The first contact portion 11 and the second contact portion 15 are formed at different locations until the pressure of the seawater reaches a predetermined pressure.

  Therefore, until the predetermined pressure is reached, the sound wave that has entered the sound insulation member 1 from the thickness direction of the sound insulation member 1 has a large difference in specific acoustic resistance (explained in the background art). Is reflected at the boundary between the first space 3 (the space that has become smaller as indicated by the broken line due to pressure) and the material portion (meat portion) of the sound insulation member 1 or the sound insulation member 1 Reflection is made at the boundary between the second space 5 (the space that has become smaller as indicated by the broken line due to the pressure) and the material portion (meat portion) of the sound insulation member, even if seawater pressure is applied. Good sound insulation can be maintained.

  That is, as indicated by each arrow AR1 in FIG. 3, when a sound wave arrives from the bottom of FIG. 3 toward the sound insulation member 1, the sound wave is reduced as shown by the first space 3 (indicated by a broken line due to pressure). Reflected at the boundary between the material portion of the sound insulation member 1 or the boundary between the second space 5 (the space that has become smaller as indicated by the broken line due to pressure) and the material portion of the sound insulation member 1. And good sound insulation can be maintained.

  When a large pressure is not applied, a portion where the first space 3 and the second space 5 overlap each other when viewed from the thickness direction of the sound insulating member 1 is widely formed. Therefore, the sound insulation effect is naturally maintained.

  Moreover, according to the sound insulation member 1, since each reinforcement member 23 and 25 is provided, in the location in which each reinforcement member 23 and 25 is provided, the said 1st space 3 and the said 2nd space 5 are one layer. Even if the sound insulation member 1 is used in seawater with higher pressure, the sound insulation effect can be maintained.

  In addition, since the reinforcing members 23 and 25 are provided, even if the thickness of the first space 3 and the second space 5 (thickness in the thickness direction of the sound insulating member 1) is reduced, When the pressure is applied, the first contact portion 11 and the second contact portion 15 can be formed at different places, and even if the sound insulating member 1 is made thin, the sound insulating property can be reduced. Can be kept in good condition.

  Further, in the sound insulating member 1, if each of the reinforcing members 23 and 25 has a function as a connecting member for connecting the sound insulating members 1 to each other, each sound insulating member is not provided with a separate connecting member. One can be easily connected.

  Furthermore, according to the sound insulation member 1, since the specific part of the sound insulation member 1 is made of rubber or synthetic resin whose specific gravity is close to the specific gravity of seawater, the specific gravity of each of the sound insulation members 1 (each formed inside) The specific gravity including the spaces 3 and 5 is close to the specific gravity of seawater. Therefore, when the sound insulation member 1 is installed in the sea, the weight of the sound insulation member 1 is reduced by the buoyancy of the seawater, and the sound insulation It becomes easy to support the member 1.

[Second Embodiment]
FIG. 7 is a view showing a schematic configuration of a sound insulating member 1a according to the second embodiment of the present invention, and is a view corresponding to the IIIA-IIIB cross section of FIG.

  In the sound insulating member 1a according to the second embodiment, the form of each space (the first space 33 and the second space 35) formed inside the sound insulating member is the sound insulating member according to the first embodiment. Unlike the first embodiment, the other points are configured in substantially the same manner as the sound insulation member 1 according to the first embodiment, and exhibit substantially the same effects.

  That is, the sound insulation member 1a according to the second embodiment of the invention includes the first space 33 and the second space 35 therein.

  The first space 33 extends on one side in the thickness direction of the sound insulating member 1a, extends in the width direction of the sound insulating member 1a, extends in the length direction of the sound insulating member 1a, and the sound insulating member 1a. The cross section by a plane perpendicular to the length direction is provided in the middle in the width direction of the sound insulation member 1a from a portion on one side in the width direction of the sound insulation member 1a. From the intermediate part in the width direction of the sound insulation member 1a to the other side in the width direction of the sound insulation member 1a, the first predetermined width T11 is formed until reaching the portion. Since it is formed in a rectangular shape having a second predetermined width T13 wider than the first predetermined width T11, it is formed in an “L” shape.

The second space 35 extends on the other side in the thickness direction of the sound insulating member 1a and extends in the width direction of the sound insulating member 1a and extends in the length direction of the sound insulating member 1a. A thin section in the thickness direction is provided, and a cross section by a plane perpendicular to the length direction is an intermediate portion in the width direction of the sound insulation member 1a from a portion on the other side in the width direction of the sound insulation member 1a. Is formed in a rectangular shape having a third predetermined width T15, and is third from the intermediate portion in the width direction of the sound insulation member 1a to a portion on one side in the width direction of the sound insulation member 1a. Since it is formed in a rectangular shape having a fourth predetermined width T17 wider than the predetermined width T15, it is formed in an “L” shape. Also, the sound insulating member 1a is viewed from the thickness direction. Part of the first space 33 (part of width T11) And a part of the second space 35 (part having a width T15) overlap each other.

  When the sound insulating member 1a is installed in seawater having a high pressure, the outer wall of the sound insulating member 1a is bent as shown by a broken line in FIG. 7, and the contact portions 37 and 39 are formed in the spaces 33 and 35, respectively. However, when viewed from the thickness direction of the sound insulation member 1a, the contact portions 37 and 39 are formed at different locations as in the sound insulation member 1 according to the first embodiment. It has become.

  The reinforcing member 23 is provided, for example, at an end portion of the first space 33 (an end portion of the portion formed with the second predetermined width T13), and the reinforcing member 25 is, for example, It is provided at an end of the second space 35 (an end of a portion formed with the fourth predetermined width T17).

[Third Embodiment]
FIG. 8 is a diagram showing a schematic configuration of a sound insulating member 1b according to the third embodiment of the present invention, and is a diagram corresponding to a section taken along the line IIIA-IIIB of FIG.

  The sound insulation member 1b according to the third embodiment is the sound insulation member according to the first embodiment in the form of each space (first space 43, second space 45) formed inside the sound insulation member. Unlike the first embodiment, the other points are configured in substantially the same manner as the sound insulation member 1 according to the first embodiment, and exhibit substantially the same effects.

  That is, the sound insulation member 1b according to the third embodiment of the invention includes the first space 43 and the second space 45 therein.

  The first space 43 extends in the width direction of the sound insulation member 1b and extends in the length direction of the sound insulation member 1b on one side in the thickness direction of the sound insulation member 1b, and the sound insulation member 1b. The sound insulation member 1b is formed in a long strip shape (for example, a rectangular shape) by a plane perpendicular to the length direction of the sound insulation member 1b.

  Similarly to the first space 43, the second space 45 extends in the width direction of the sound insulation member 1b on the other side in the thickness direction of the sound insulation member 1b, and extends the length of the sound insulation member 1b. The sound insulating member 1b extends in the vertical direction and is formed so as to be thin in the thickness direction of the sound insulating member 1b, and a cross section by a plane perpendicular to the longitudinal direction is formed in a long band shape (for example, a rectangular shape).

  Further, when viewed from the thickness direction of the sound insulating member 1b, at least a part of the first space 43 and at least a part of the second space 45 overlap each other.

  For example, the first space 43 is formed to extend from the vicinity of one end face in the width direction of the sound insulating member 1b to a place away from the other end face by a predetermined distance. The second space 45 is formed to extend from the vicinity of the other end surface in the width direction of the sound insulating member 1b to a place away from the one end surface by a predetermined distance.

  When the sound insulation member 1b is installed in seawater having a high pressure, the outer wall of the sound insulation member 1b bends and the contact portions 47 and 49 are formed in the spaces 43 and 45, as indicated by broken lines in FIG. However, when viewed from the thickness direction of the sound insulation member 1b, the contact portions 47 and 49 are formed at different locations as in the sound insulation member 1 according to the first embodiment. It has become.

  The reinforcing member 23 is provided at an end portion of the first space 43 located in the vicinity of one end face in the width direction of the sound insulating member 1b, and the reinforcing member 25 is provided on the sound insulating member 1b. It is provided at the end of the second space 45 located near the other end face in the width direction.

  Furthermore, as shown in FIG. 9 (a diagram showing a modification of the sound insulation member according to the third embodiment, corresponding to FIG. 8), the first space 43 is formed in the same manner as the first space 43. When the space 53 and the second space 55 formed in the same manner as the second space 45 are arranged and viewed from the thickness direction of the sound insulating member 1b, the entire first space 53 and the second space The entire space 55 may overlap each other.

  In this case, for example, the reinforcing member 23 is installed in the first space 53 on one end side in the width direction of the sound insulating member, and the reinforcing member 25 is provided on the other end side in the width direction of the sound insulating member, for example. And installed in the second space 55.

  Then, even if the outer walls of the sound insulation member bend due to the pressure of seawater as shown by broken lines in FIG. 9 and the contact portions 57 and 59 are formed in the spaces 53 and 55, the contact portions 57 and 59 are When viewed from the thickness direction of the sound insulation member, the sound insulation members 1 are formed at different locations as in the sound insulation member 1 according to the first embodiment.

  By the way, in each said embodiment, although the 1st internal space and the 2nd internal space were provided suitably, you may make it the sound-insulation member of the following structures.

  That is, the outer shape is formed in a flat plate shape, and extends in the width direction of the sound insulation member, extends in the length direction of the sound insulation member, and is thinly formed in the thickness direction of the sound insulation member. And the meat part is made of metal such as steel (a highly rigid member), and the overall specific gravity (the value obtained by dividing the overall weight by the volume of the space and the meat part) is substantially equal to the specific gravity of the sea water The sound insulation member may be slightly larger than the specific gravity of seawater.

  According to the sound insulation member, the overall specific gravity is substantially equal to or slightly larger than the specific gravity of the seawater. Therefore, when the sound insulation member is set in the sea, the weight of the sound insulation member is reduced, and it becomes easy to support the sound insulation member.

  In addition, since the meat portion of the sound insulation member is formed of a highly rigid metal, the sound insulation member is not easily deformed by the pressure in the seawater, and therefore the space is not easily crushed, and the sound insulation property is good. Can be maintained.

  By the way, in the sound-insulating member according to each of the embodiments, the case where two spaces are provided has been described as an example, but a plurality of three or more spaces may be provided.

  That is, in the sound insulation member according to each of the embodiments, a plurality of spaces are independently provided inside the sound insulation member, and one side of the sound insulation member and the other side of the sound insulation member are connected to each other. When viewed from the direction, at least a part of each space overlaps each other, and due to the pressure of the liquid outside the sound insulation member, each space is deformed and a part of the inner wall of each space comes into contact with each other. A contact portion is formed, and when viewed from a direction in which one side of the sound insulation member and the other side of the sound insulation member are connected to each other, the contact portion overlaps the spaces. Any one of the spaces is formed so as to cover the entire overlapping range until the pressure of the liquid outside the sound insulation member reaches a predetermined pressure. Space Non-contact portion may be (part other than the contact portion) is present.

  In other words, when the pressure of the liquid outside the sound insulation member becomes a predetermined pressure when viewed from the direction connecting the one side of the sound insulation member and the other side of the sound insulation member to each other. The non-contact portion of any one of the spaces may exist in any part of the range where the spaces overlap.

It is a figure showing a schematic structure of a sound insulation member concerning a 1st embodiment of the present invention. It is a figure which shows the II arrow in FIG. It is a figure which shows the IIIA-IIIB cross section in FIG. It is a figure which shows another arrangement | positioning form of the internal space of a sound insulation member, and is a figure corresponded to the IIIA-IIIB cross section of FIG. It is a figure which shows another arrangement | positioning form of the internal space of a sound insulation member, and is a figure corresponded to the IIIA-IIIB cross section of FIG. It is a figure which shows the other installation form of a reinforcement member. It is a figure which shows schematic structure of the sound-insulation member which concerns on the 2nd Embodiment of this invention, and is a figure equivalent to the IIIA-IIIB cross section of FIG. It is a figure which shows schematic structure of the sound insulation member which concerns on the 3rd Embodiment of this invention, and is a figure equivalent to the IIIA-IIIB cross section of FIG. It is a figure which shows the modification of the sound insulation member which concerns on 3rd Embodiment, and is a figure corresponding to FIG.

Explanation of symbols

1, 1a, 1b Sound insulating members 3, 33, 43 First space 5, 35, 45 Second space 7 Internal partition wall 9 First partition wall 11 First contact portion 13 Second partition wall 15 Second contact portion 19 Sites other than the first contact portion 21 Sites 23 and 25 other than the second contact portion Reinforcing member

Claims (10)

In sound insulation members used in liquids,
A first space provided on one side of the sound insulation member inside the sound insulation member;
The sound insulation member is provided on the other side of the sound insulation member, and is provided apart from the first space with an internal partition existing inside the sound insulation member. Two spaces;
And at least part of the first space and at least part of the second space when viewed from a direction connecting the one side of the sound insulation member and the other side of the sound insulation member to each other. Overlap each other,
Due to the pressure of the liquid outside the sound insulation member, a first partition formed between the outside of the sound insulation member and the first space on the one side is bent toward the inside of the sound insulation member, and the first 1 partition and the internal partition are in contact with each other to form a first contact portion,
Due to the pressure of the liquid outside the sound insulation member, a second partition formed between the outside of the sound insulation member on the other side and the second space is bent inward of the sound insulation member, and the first 2 partition walls and the internal partition wall contact each other to form a second contact portion,
When viewed from a direction in which one side of the sound insulation member and the other side of the sound insulation member are connected to each other, the first contact portion and the second contact portion are the first space and the first contact portion. The first contact portion and the second space until the pressure of the liquid outside the sound insulation member reaches a predetermined pressure. A sound insulating member, wherein the sound insulating member is formed at a location different from the contact portion. The sound insulation member according to claim 1,
The outer shape of the sound insulation member is formed in a flat plate shape,
The first space is formed on one side in the thickness direction of the sound insulation member so as to extend along an end surface in the thickness direction of the sound insulation member,
The sound insulation member according to claim 2, wherein the second space is formed to extend along an end surface of the sound insulation member in the thickness direction on the other side in the thickness direction of the sound insulation member. In the sound insulation member according to claim 2,
The thickness of the first space in the first contact portion that is formed until the pressure of the liquid outside the sound insulation member reaches the predetermined pressure becomes the first contact portion. Less than the thickness of the first space in the part other than the part
The thickness of the second space in the second contact portion that is formed until the pressure of the liquid outside the sound insulation member reaches the predetermined pressure is the second contact portion. A sound insulating member, wherein the thickness of the second space is smaller than that of the second space. In the sound insulation member according to any one of claims 1 to 3,
A first reinforcing member for forming, in the first space, a portion other than the first contact portion formed until the pressure of the liquid outside the sound insulating member reaches the predetermined pressure. Provided,
A second reinforcing member for forming, in the second space, a portion other than the second contact portion that is formed until the pressure of the liquid outside the sound insulating member reaches the predetermined pressure. A sound insulation member characterized by being provided. The sound insulation member according to claim 4,
The reinforcing member is a member having a function as a connecting member for connecting the sound insulating members to each other. In a flat sound insulation member used in a liquid,
The length of the sound insulating member is extended in the width direction of the sound insulating member and extended in the length direction of the sound insulating member inside the sound insulating member on one side in the thickness direction of the sound insulating member. A first space formed in such a shape that a cross section by a plane perpendicular to the width increases from one side in the width direction of the sound insulating member toward the other side;
Provided apart from the first space by extending in the width direction of the sound insulation member and extending in the length direction of the sound insulation member inside the sound insulation member and on the other side in the thickness direction of the sound insulation member And a cross section formed by a plane perpendicular to the length direction is formed in a shape that becomes wider from the other side in the width direction of the sound insulation member toward the one side. With space;
The sound insulating member, wherein when viewed from the thickness direction of the sound insulating member, at least a part of the first space and at least a part of the second space overlap each other. The sound insulation member according to claim 6,
A reinforcing member is provided at an end portion of the first space located on the other side in the width direction of the sound insulation member, in the vicinity of the end portion, or at an end portion in the width direction of the sound insulation member. A sound insulation member characterized by that. In the sound insulation member according to any one of claims 1 to 7,
The sound insulation member, wherein the sound insulation member is made of a polymer compound such as synthetic resin or rubber. In a flat sound insulation member used in a liquid,
A space that extends in the width direction of the sound insulation member and extends in the length direction of the sound insulation member inside the sound insulation member;
The meat portion of the sound insulating member is made of metal, and the specific gravity of the entire sound insulating member is substantially equal to or slightly larger than the specific gravity of the liquid. Sound insulation member. In sound insulation members used in liquids,
A plurality of spaces are provided inside the sound insulation member,
When viewed from the direction connecting the one side of the sound insulation member and the other side of the sound insulation member to each other, at least a part of the spaces overlap each other,
Due to the pressure of the liquid outside the sound insulation member, each space is deformed and a part of the inner wall of each space comes into contact with each other to form a contact portion,
When viewed from the direction in which one side of the sound insulation member and the other side of the sound insulation member are connected to each other, the contact portion is formed within a range where the spaces overlap, and the sound insulation member Until the pressure of the external liquid reaches a predetermined pressure, there is a non-contact portion of any one of the spaces so as to cover the entire range where the spaces overlap. A sound insulation member characterized by that.

Images