JP6607696B2 - Wall board soundproof structure - Google Patents

Description

  The present invention relates to a soundproof structure for a wall plate that reduces noise from the wall plate constituting the flow path.

  Conventionally, a duct wall structure that constitutes a gas flow path is known as a soundproof structure (see, for example, Patent Document 1). The duct wall structure includes an inner plate, an outer plate, an intermediate member provided between the inner plate and the outer plate, a first support member that fixes the inner plate and the intermediate member, the outer plate and the intermediate member, A second support member for fixing the first support member, an anti-vibration washer attached to a connection portion on the intermediate member side of the second support member, and a heat insulating member filled between the inner plate and the outer plate. At this time, since the vibration-proof washer is disposed inside the heat insulating member, it is difficult to be affected by heat from the high-temperature gas flowing through the gas flow path, so use a vibration-proof material with excellent vibration-proof performance. Is possible. Thereby, the duct wall structure can prevent sound transmitted through from the inside of the gas flow path to the outside.

International Publication No. 2005/015538

  Here, in the duct wall structure of Patent Document 1, a vibration-proof washer is used for soundproofing. However, in order to further improve soundproofing, a vibration-proof rubber may be provided at a connection portion between members. Conceivable. However, if the area to be sound-insulated is large, a lot of vibration-insulating rubber is used, which may increase the cost. In addition, since the vibration-proof material used for the vibration-proof washer or the vibration-proof rubber deteriorates with time, it is difficult to improve the durability.

  Then, this invention makes it a subject to provide the soundproof structure of the wall board which can reduce the noise from the wall board which comprises a flow path while improving durability and suppressing cost. .

  The soundproof structure for a wall plate of the present invention is provided on the outside of a wall plate constituting a flow path through which a fluid flows, and includes an outer plate provided to face the wall plate, and the wall plate and the outer plate. An intermediate plate provided between and facing the wall plate and the outer plate, a first support member having both ends connected to the wall plate and the intermediate plate, and both ends connected to the intermediate plate and A second support member connected to the outer plate, and a sound absorbing material provided at least one of the wall plate and the intermediate plate and between the intermediate plate and the outer plate, A connection portion between the first support member and the wall plate, a connection portion between the first support member and the intermediate plate, a connection portion between the second support member and the intermediate plate, the second support member and the outer plate. And at least one of the connecting portion and the intermediate plate is an elastic portion. .

  According to this structure, the elastic part which elastically deforms can be provided in the vibration system from the wall plate to the outer plate. At this time, by configuring the elastic portion using a rigid material such as a metal material, the durability of the elastic portion can be improved, and the cost is low because the elastic portion uses an inexpensive material. The sound can be attenuated by the elastic portion without using an anti-vibration washer or the like. Accordingly, it is possible to reduce the noise from the wall plates constituting the flow path while improving the durability and suppressing the cost.

  Further, the intermediate plate is a metal plate, and the elastic portion is a slit processing elastic portion in which a part of the intermediate plate is elastically deformed by forming a slit in the intermediate plate, and the slit processing elasticity It is preferable that the portion is provided in at least one of a connection portion between the first support member and the intermediate plate and a connection portion between the second support member and the intermediate plate.

  According to this configuration, by forming slits (cuts) in the intermediate plate, a part of the intermediate plate can function as the elastic portion, so that the elastic portion can be simplified. In addition, any shape may be sufficient as a slit, for example, you may form two in parallel.

  Further, in the vibration system from the wall plate to the outer plate, the slit machining elastic part is formed so that the natural frequency of the vibration system is 1/2 or less of the target frequency to be reduced. It is preferable to do.

  According to this configuration, since the target frequency can be appropriately attenuated without causing the vibration system to resonate, the soundproofing performance by the elastic portion can be enhanced. Specifically, it is more preferable to form the slit so that the natural frequency of the vibration system is 1/2 to 1/3 or less of the target frequency to be reduced.

  The elastic portion is provided at a connection portion between the first support member and the wall plate, is connected to the wall plate so as to be elastically deformable, and is connected to an end portion of the first support member. And a second spring connected to the intermediate plate so as to be elastically deformable and connected to an end of the first support member. A third spring connected to the intermediate plate so as to be elastically deformable and connected to an end of the second support member. A fourth plate provided at a connection portion between a leaf spring, the second support member and the outer plate, connected to the outer plate so as to be elastically deformable, and connected to an end portion of the second support member Among the springs, at least one of the leaf springs is preferable.

  According to this configuration, a leaf spring is provided between each support member (first support member or second support member) and each plate member (wall plate, intermediate plate, or outer plate), thereby functioning as an elastic portion. Therefore, the elastic part can be configured simply.

  Moreover, it is preferable that the said leaf | plate spring is slidably contacted with another member at the time of elastic deformation.

  According to this configuration, the leaf spring is in sliding contact with other members, so that the sound can be attenuated by friction and the soundproofing performance by the elastic portion can be enhanced. In addition, as another member, each board | plate material (a wall board, an intermediate board, or an outer plate) may be sufficient, and a plurality of leaf | plate springs may be provided and leaf | plate springs may be slidably contacted.

  Moreover, it is preferable that the said leaf | plate spring is connected to the said plate surface via the wedge structure for inclining and attaching with respect to the plate surface of the said wall plate, the said intermediate | middle plate, and the said outer plate.

  According to this configuration, since the leaf spring can be attached to be inclined by the wedge structure, one end portion of the leaf spring is a fixed end, and the other end portion of the leaf spring is a free end. Since the arm length from the fixed end to the free end can be adjusted by changing the connection position of each support member connected to the leaf spring, the spring constant of the leaf spring can be adjusted, and a hard spring can be easily realized. It can be a structure.

  The leaf spring has a curved portion that is curved between both end portions, and one of the plate surfaces of the wall plate, the intermediate plate, and the outer plate is connected to one end portion, and the other end It is preferable that either the first support member or the second support member is connected to the portion.

  According to this structure, the function as an elastic part can be exhibited suitably by providing a curved part in a leaf | plate spring.

  Moreover, it is preferable that the said elastic part is the said intermediate | middle board and elastically deforms by the vibration from a said 1st support member.

  According to this structure, since an intermediate | middle board can be functioned as an elastic part, an elastic part can be made into a simple structure. At this time, the first support member and the second support member are preferably arranged such that the intermediate plate is easily elastically deformed, and more preferably arranged in a staggered manner, for example.

  Moreover, it is preferable that the said intermediate | middle board is a leaf | plate spring which connects the said 1st support member and the said 2nd support member, and is provided integrally with the said 1st support member and the said 2nd support member.

  According to this configuration, since the intermediate plate can be a leaf spring and the first support member, the second support member, and the intermediate plate can be integrated, a simpler configuration can be achieved.

  Moreover, it is preferable that the said intermediate | middle board is an elastic body which connects a said 1st support member and a said 2nd support member.

  According to this configuration, since the intermediate plate can be an elastic body and the first support member, the second support member, and the intermediate plate can be integrated, a simpler configuration can be achieved. In addition, as an elastic body, it is a rubber material, for example.

  The second support member preferably has different vibration impedances in the propagation direction in which vibration propagates.

  According to this configuration, the vibration propagating in the second support member can be partially reflected toward the wall plate side, so that the sound propagating from the second support member toward the outer plate side can be suppressed. it can. Therefore, the noise from the wall board which comprises a flow path can be reduced more. In addition, when making the vibration impedance of a 2nd supporting member differ, the material of a 2nd supporting member may be changed and the cross-sectional shape of a 2nd supporting member may be changed.

  Moreover, it is preferable that the said 2nd support member is a shape where the cross-sectional shape cut | disconnected by the surface orthogonal to the said propagation direction differs toward the said propagation direction.

  According to this configuration, the vibration impedance can be varied by changing the cross-sectional shape of the second support member.

  Further, the second support member is a stud bolt, and the stud bolt and the outer plate are fastened with a nut in a state where an outer end portion of the stud bolt protrudes outward from the outer plate. It is preferable to further include a soundproof member that is connected and covers the outer end of the stud bolt and the nut.

  According to this configuration, since the stud bolt protruding from the outer plate can be covered with the soundproof member, the soundproof performance can be further enhanced.

  Moreover, it is preferable that the soundproof member is formed using an elastic material and has an air layer therein.

  According to this configuration, since the propagation of vibration can be suppressed in the air layer, the soundproof performance of the soundproof member itself can be enhanced.

  The other soundproof structure of the wall plate of the present invention is provided on the outside of the wall plate constituting the flow path through which the fluid flows, the outer plate provided to face the wall plate, the wall plate and the outer plate. An intermediate plate provided opposite to the wall plate and the outer plate, a first support member having both ends connected to the wall plate and the intermediate plate, and both ends connected to the intermediate plate. A second support member connected to each of the plate and the outer plate, and a sound absorbing material provided between at least one of the wall plate and the intermediate plate and between the intermediate plate and the outer plate. The second support member has a different vibration impedance in a propagation direction in which vibration propagates.

  According to this configuration, the vibration propagating in the second support member can be partially reflected toward the wall plate side, and therefore, from the second support member to the outer plate side without using an anti-vibration washer or the like. The sound propagating toward it can be suppressed. Accordingly, it is possible to reduce the noise from the wall plates constituting the flow path while improving the durability and suppressing the cost.

  The other soundproof structure of the wall plate of the present invention is provided on the outside of the wall plate constituting the flow path through which the fluid flows, the outer plate provided to face the wall plate, the wall plate and the outer plate. An intermediate plate provided opposite to the wall plate and the outer plate, a first support member having both ends connected to the wall plate and the intermediate plate, and both ends connected to the intermediate plate. A second support member connected to each of the plate and the outer plate, a sound absorbing material provided between at least one of the wall plate and the intermediate plate, and between the intermediate plate and the outer plate; A sound-insulating member that covers the outside of the connecting portion between the support member and the outer plate, the second support member is a stud bolt, and the stud bolt and the outer plate are located outside the stud bolt. The nut is fastened with the end protruding outward from the outer plate. Connected, the soundproof member is characterized by covering the outer end and the nut of the stud bolt.

  According to this configuration, since the stud bolt protruding from the outer plate can be covered with the soundproof member, the soundproof performance can be enhanced.

FIG. 1 is a schematic perspective view of a soundproof structure for a wallboard according to the first embodiment. FIG. 2 is a schematic cross-sectional view of the soundproof structure for a wallboard according to the first embodiment. FIG. 3 is a plan view of an example showing the shape of the slit formed in the intermediate plate. FIG. 4 is a schematic perspective view of a soundproof structure for a wallboard according to the second embodiment. FIG. 5 is a schematic perspective view of a soundproof structure for a wallboard according to the third embodiment. FIG. 6 is a schematic perspective view of a soundproof structure for a wallboard according to the fourth embodiment. FIG. 7 is a schematic cross-sectional view of a soundproof structure for a wallboard according to a fourth embodiment. FIG. 8 is a schematic perspective view of a soundproof structure for a wall plate according to the fifth embodiment. FIG. 9 is a schematic perspective view of a soundproof structure for a wallboard according to Embodiment 6. FIG. FIG. 10 is a schematic perspective view of another example of the soundproof structure of a wall board according to the sixth embodiment. FIG. 11 is a schematic cross-sectional view of a soundproof structure for a wallboard according to the seventh embodiment. FIG. 12 is a schematic cross-sectional view of another example of the soundproof structure of a wall board according to the seventh embodiment. FIG. 13: is typical sectional drawing of the soundproof structure of the wall board which concerns on Embodiment 8. FIG. FIG. 14 is a schematic cross-sectional view of another example of the soundproof structure of a wall board according to the eighth embodiment. FIG. 15: is a typical fragmentary sectional view of the soundproof structure of the wall board which concerns on Embodiment 9. FIG. FIG. 16: is a typical fragmentary sectional view of the soundproof structure of the wall board of another example which concerns on Embodiment 9. FIG.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. Furthermore, the constituent elements described below can be appropriately combined, and when there are a plurality of embodiments, the embodiments can be combined.

[Embodiment 1]
FIG. 1 is a schematic perspective view of a soundproof structure for a wallboard according to the first embodiment. FIG. 2 is a schematic cross-sectional view of the soundproof structure for a wallboard according to the first embodiment. FIG. 3 is a plan view of an example showing the shape of the slit formed in the intermediate plate.

  As shown in FIG. 1, the soundproof structure 10 according to the first embodiment is provided on a wall plate 1 constituting a flow path through which a fluid flows. The flow path includes, for example, a duct on the intake side or a duct on the exhaust side of the gas turbine, and high-temperature gas such as exhaust gas may circulate. In such a flow path, a fluid machine such as a blower is provided to circulate the fluid. When this fluid machine operates, sound generated by the operation of the fluid machine propagates inside the flow path. Since the sound propagating in the flow path propagates to the outside through the wall plate 1, the soundproof structure 10 is provided on the wall plate 1 to reduce external noise.

  As shown in FIG. 1, the soundproof structure 10 is provided outside the wall plate 1, and includes an outer plate 11, an intermediate plate 12, a first support member 13, a second support member 14, and a sound absorbing material 15. It has.

  The outer plate 11 is provided to face the wall plate 1, and the plate surface of the outer plate 11 and the plate surface of the wall plate 1 are arranged in parallel. The outer plate 11 is a so-called exterior plate, and for example, a thin steel plate is used.

  The intermediate plate 12 is provided between the wall plate 1 and the outer plate 11. The plate surface of the intermediate plate 12 and the plate surface of the outer plate 11 are arranged so as to be parallel, and similarly, the plate surface of the intermediate plate 12 and the plate surface of the wall plate 1 are parallel. Has been placed. The intermediate plate 12 is configured using a steel plate, and a part thereof is an elastic portion.

  The elastic part of the intermediate plate 12 is a slit processing elastic part in which a part of the intermediate plate 12 is elastically deformed by forming the slit 21. As shown in FIG. 1, the slit 21 is formed in an elongated shape extending in the longitudinal direction with a predetermined direction as the longitudinal direction. Two slits 21 are provided. The two slits 21 are arranged in parallel on the plate surface of the intermediate plate 12 so as to face each other in the direction orthogonal to the longitudinal direction.

  Here, as shown in FIG. 3, as the slit 21, for example, there is a slit 21 a opened in a rectangular shape. The slit 21 includes, for example, a slit 21b in which both ends in the longitudinal direction of the slit 21a are opened in a circular shape, or a slit 21c in which both ends in the longitudinal direction of the slit 21a are opened in an oval shape.

  The first support member 13 is configured using a stud bolt that is long in the axial direction, one end in the axial direction is connected to the wall plate 1, and the other end in the axial direction is connected to the intermediate plate 12. As for the 1st supporting member 13, the connection part connected to the wall board 1 is connected by welding. In addition, the connection part of the 1st support member 13 and the wall board 1 is not restricted to welding, For example, a nut may be welded to the wall board 1 and the 1st support member 13 may be fastened to the welded nut.

  The first support member 13 is fastened using a nut 17 at a connection portion connected to the intermediate plate 12. That is, the intermediate plate 12 has a through hole through which the first support member 13 is inserted, and the nuts 17 are fastened to both sides of the intermediate plate 12 with respect to the first support member 13 inserted into the through hole. As a result, the first support member 13 and the intermediate plate 12 are connected. Here, the first support member 13 is connected to a portion other than the elastic portion of the intermediate plate 12, that is, the non-elastic portion of the intermediate plate 12.

  Similarly to the first support member 13, the second support member 14 is configured by using stud bolts that are long in the axial direction, one end in the axial direction is connected to the intermediate plate 12, and the other end in the axial direction is external. Connected to the plate 11. As for the 2nd support member 14, the connection part connected to the intermediate | middle board 12 is connected by welding. Here, the second support member 14 is connected to the elastic portion of the intermediate plate 12. That is, the second support member 14 is connected between the adjacent slits 21.

  Further, similarly to the first support member 13, the second support member 14 is fastened using a nut 17 at a connection portion connected to the outer plate 11. That is, the outer plate 11 is formed with a through hole through which the second support member 14 is inserted, and the nuts 17 are fastened to both sides of the outer plate 11 with respect to the second support member 14 inserted into the through hole. Thus, the second support member 14 and the outer plate 11 are connected.

  The sound absorbing material 15 is made of, for example, glass wool, and is disposed between the wall plate 1 and the intermediate plate 12 and between the intermediate plate 12 and the outer plate 11 as shown in FIGS. Has been. The sound absorbing material 15 may be provided between at least one of the wall plate 1 and the intermediate plate 12 and between the intermediate plate 12 and the outer plate 11.

  In the soundproof structure 10 configured as described above, when sound propagates from the wall plate 1, the sound propagates from the wall plate 1 to the inelastic portion of the intermediate plate 12 via the first support member 13. . Thereafter, the sound propagates from the inelastic portion of the intermediate plate 12 to the elastic portion and travels from the elastic portion to the second support member 14. At this time, since the sound passes through the elastic portion, the sound is attenuated at the elastic portion of the intermediate plate 12.

  Here, in the soundproof structure 10, the shape of the slit 21 is adjusted to appropriately attenuate the propagating sound. Specifically, when the natural frequency in the vibration system from the wall plate 1 to the outer plate 11 is f1, and the target frequency to be reduced is f2, the natural frequency f1 is from 1/2 to 1 of the target frequency f2. The shape of the slit 21 is formed so as to be equal to or less than / 3, that is, “f1 ≦ (f2 / 2 to f2 / 3)”.

  As described above, according to the first embodiment, in the vibration system from the wall plate 1 to the outer plate 11, the intermediate plate 12 can be provided with an elastic portion that is elastically deformed. At this time, since the elastic portion can be configured using a steel plate, the durability of the elastic portion can be improved, and the cost can be suppressed because the elastic portion is a steel plate. The sound can be attenuated by the elastic portion without using an anti-vibration washer or the like. Therefore, the soundproof structure 10 can reduce the noise from the wall plate 1 constituting the flow path while improving the durability and suppressing the cost.

  Further, according to the first embodiment, by forming the slit (cut) 21 in the intermediate plate 12, a part of the intermediate plate 12 can function as an elastic portion, so that the elastic portion can be easily configured. it can.

  Further, according to the first embodiment, by setting “f1 ≦ (f2 / 2 to f2 / 3)”, the target frequency f2 is appropriately set without causing the vibration system from the wall plate 1 to the outer plate 11 to resonate. Therefore, the soundproofing performance by the elastic part can be enhanced.

  In the first embodiment, by forming two parallel slits 21, a part of the intermediate plate 12 functions as an elastic part. However, the shape and number of the slits 21 are not particularly limited, and the elastic part As long as it functions as, any shape may be sufficient.

  In the first embodiment, the elastic portion of the intermediate plate 12 is provided at the connection portion between the second support member 14 and the intermediate plate 12, but the configuration is not limited thereto. The elastic portion of the intermediate plate 12 may be provided in at least one of the connection portion between the second support member 14 and the intermediate plate 12 and the connection portion between the first support member 13 and the intermediate plate 12.

[Embodiment 2]
Next, the soundproof structure 30 according to the second embodiment will be described with reference to FIG. FIG. 4 is a schematic perspective view of a soundproof structure for a wallboard according to the second embodiment. In the second embodiment, parts that are different from the first embodiment will be described in order to avoid redundant descriptions, and parts that are the same as those in the first embodiment will be described with the same reference numerals.

  The soundproof structure 30 according to the second embodiment is configured by using a leaf spring 31 in which an elastic portion provided at a connection portion between the second support member 14 and the intermediate plate 12 is elastically deformed instead of the slit 21 according to the first embodiment. Has been. Specifically, a plate spring 31 is provided between the intermediate plate 12 and the second support member 14, and the plate spring 31 is connected and fixed to the intermediate plate 12 by welding so as to be elastically deformable. Further, one end of the second support member 14 is connected to the leaf spring 31 by welding. The leaf spring 31 attenuates sound propagating from the intermediate plate 12 to the second support member 14.

  As described above, according to the second embodiment, by providing the leaf spring 31 between the second support member 14 and the intermediate plate 12, the elastic portion can be made to function as an elastic portion. can do.

  In the second embodiment, the leaf spring 31 is provided between the second support member 14 and the intermediate plate 12, but the configuration is not limited thereto. The leaf spring 31 may be provided at a connection portion between the first support member 13 and the wall plate 1, a connection portion between the first support member 13 and the intermediate plate 12, or a connection portion between the second support member 14 and the outer plate 11. Good.

[Embodiment 3]
Next, the soundproof structure 40 according to Embodiment 3 will be described with reference to FIG. FIG. 5 is a schematic perspective view of a soundproof structure for a wallboard according to the third embodiment. In the third embodiment, parts that are different from the first and second embodiments will be described in order to avoid redundant descriptions, and parts that have the same configurations as those in the first and second embodiments will be described with the same reference numerals.

  The soundproof structure 40 according to the third embodiment uses a plurality of leaf springs 41 in which an elastic portion provided at a connection portion between the second support member 14 and the intermediate plate 12 is elastically deformed instead of the slit 21 according to the first embodiment. Configured. Specifically, a plurality of plate springs 41 are provided between the intermediate plate 12 and the second support member 14, and the plurality of plate springs 41 can be elastically deformed to the intermediate plate 12 by welding in a superposed state. Connected to. For example, when two leaf springs 41 are used, the two leaf springs 41 are overlapped in a cross shape. Here, the elastic force of the plurality of leaf springs 41 is adjusted so that they are in sliding contact with each other during elastic deformation. Each leaf spring 41 may be joined and fixed on both sides by welding, one end may be joined by welding, and the other end may be in a free state, and is not particularly limited.

  As described above, according to the third embodiment, since the plurality of leaf springs 41 are in sliding contact with each other, sound can be attenuated by friction, and soundproof performance by the elastic portion can be enhanced.

  In the third embodiment, the plurality of leaf springs 41 are slidably contacted with each other, but one leaf spring 41 may be used and may be provided so as to slidably contact other members such as the intermediate plate 12. Any configuration may be used as long as 41 is in sliding contact.

[Embodiment 4]
Next, a soundproof structure 50 according to Embodiment 4 will be described with reference to FIGS. 6 and 7. FIG. 6 is a schematic perspective view of a soundproof structure for a wallboard according to the fourth embodiment. FIG. 7 is a schematic cross-sectional view of a soundproof structure for a wallboard according to a fourth embodiment. In the fourth embodiment, parts that are different from those in the first to third embodiments will be described in order to avoid duplicate descriptions, and parts that have the same configuration as those in the first to third embodiments will be described with the same reference numerals.

  The soundproof structure 50 according to the fourth embodiment includes a leaf spring 51 and a wedge structure in which an elastic portion provided at a connection portion between the second support member 14 and the intermediate plate 12 is elastically deformed instead of the slit 21 according to the first embodiment. 52.

  Specifically, a leaf spring 51 and a wedge structure 52 are provided between the intermediate plate 12 and the second support member 14, and the leaf spring 51 is placed on the plate surface of the intermediate plate 12 by the wedge structure 52. It is attached with an inclination.

  The wedge structure 52 is a member having a triangular cross-section and three inclined side surfaces, and is connected to the intermediate plate 12 by welding in a state where one side surface is in contact with the plate surface of the intermediate plate 12. . The leaf spring 51 is connected to the intermediate plate 12 and the wedge structure 52 by welding while being in contact with one exposed inclined surface of the wedge structure 52. At this time, the one end of the leaf spring 51 becomes a fixed end connected to the intermediate plate 12, while the other end becomes a free end in a free state. And the one end part of the 2nd supporting member 14 is connected to the site | part used as a free end by the welding to the leaf | plate spring 51. FIG. The leaf spring 51 attenuates sound propagating from the intermediate plate 12 to the second support member 14. The leaf spring 51 attached to the intermediate plate 12 via the wedge structure 52 is attached to the intermediate plate 12 while being inclined along the inclined surface of the wedge structure 52.

  As described above, according to the fourth embodiment, since the length of the arm from the fixed end to the free end can be adjusted by changing the connection position of the second support member 14 connected to the plate spring 51, the plate spring The spring constant of 51 can be adjusted, and it can be set as the structure which is easy to implement | achieve a hard spring.

[Embodiment 5]
Next, a soundproof structure 60 according to Embodiment 5 will be described with reference to FIG. FIG. 8 is a schematic perspective view of a soundproof structure for a wall plate according to the fifth embodiment. In the fifth embodiment, in order to avoid redundant description, portions different from the first to fourth embodiments will be described, and portions having the same configurations as those of the first to fourth embodiments will be described with the same reference numerals.

  The soundproof structure 60 of the fifth embodiment uses a curved leaf spring 61 in which an elastic portion provided at a connection portion between the second support member 14 and the intermediate plate 12 is elastically deformed instead of the slit 21 of the first embodiment. It is configured. Specifically, a curved leaf spring 61 is provided between the intermediate plate 12 and the second support member 14, and the curved leaf spring 61 is a curved portion where the central portion between both ends is curved. One end of the curved leaf spring 61 is connected to the intermediate plate 12 by welding. Further, the other end of the curved leaf spring 61 is connected to one end of the second support member 14 by welding. The curved leaf spring 61 attenuates sound propagating from the intermediate plate 12 to the second support member 14.

  As described above, according to the fifth embodiment, the curved leaf spring 61 has the curved portion, so that the function as the elastic portion can be suitably exhibited.

[Embodiment 6]
Next, a soundproof structure 70 according to the sixth embodiment will be described with reference to FIG. FIG. 9 is a schematic perspective view of a soundproof structure for a wallboard according to Embodiment 6. FIG. In the sixth embodiment as well, parts that are different from the first to fifth embodiments will be described in order to avoid duplicate descriptions, and parts that have the same configuration as those of the first to fifth embodiments will be described with the same reference numerals.

  In the soundproof structure 70 of the sixth embodiment, the intermediate plate 71 itself functions as an elastic portion, and the slit 21 of the first embodiment is omitted. As in the first embodiment, the intermediate plate 71 is configured by using a steel plate and has elasticity, and attenuates sound propagating from the first support member 13. At this time, the first support member 13 and the second support member 14 are arranged such that the intermediate plate 71 is easily elastically deformed. For example, the first support member 13 and the second support member 14 are alternately arranged in a predetermined direction within the plate surface of the intermediate plate 71. Arranged in a staggered pattern.

  As described above, according to the sixth embodiment, since the intermediate plate 71 can function as an elastic part, the elastic part can have a simpler configuration.

  In the sixth embodiment, the first support member 13 and the second support member 14 have the same configuration as in the first embodiment, and thus the description thereof is omitted. However, for example, the configuration shown in FIG. FIG. 10 is a schematic perspective view of another example of the soundproof structure of a wall board according to the sixth embodiment. That is, as shown in FIG. 10, the first support member 13a and the second support member 14a may use steel plates, and in this case, the plate surfaces are arranged so as to be parallel to each other.

[Embodiment 7]
Next, the soundproof structure 80 according to Embodiment 7 will be described with reference to FIG. FIG. 11 is a schematic cross-sectional view of a soundproof structure for a wallboard according to the seventh embodiment. In the seventh embodiment, parts that are different from those in the first to sixth embodiments will be described in order to avoid redundant descriptions, and parts that have the same configuration as those in the first to sixth embodiments will be described with the same reference numerals.

  In the soundproof structure 80 of the seventh embodiment, the second support member 81 has different vibration impedances in the propagation direction (axial direction) in which sound propagates. Specifically, the second support member 81 has a circular cross-sectional shape cut by a plane orthogonal to the axial direction, and is formed so that the diameter continuously decreases from the intermediate plate 12 toward the outer plate 11. Has been. For this reason, part of the sound propagating from the intermediate plate 12 to the second support member 81 is reflected toward the intermediate plate 12 when passing through the second support member 81.

  As described above, according to the seventh embodiment, the vibration propagating in the second support member 81 can be partially reflected toward the intermediate plate 12 side (wall plate 1 side). Can be suppressed from propagating toward the outer plate 11 side. Therefore, the soundproof structure 80 can further reduce noise from the wall plate 1 constituting the flow path.

  In the seventh embodiment, the vibration impedance is varied by continuously changing the cross-sectional shape of the second support member 81 in the axial direction. However, for example, the configuration shown in FIG. FIG. 12 is a schematic cross-sectional view of another example of the soundproof structure of a wall board according to the seventh embodiment. That is, as shown in FIG. 12, the cross-sectional shape of the second support member 82 changes stepwise in the axial direction. Specifically, the second support member 82 has a circular cross-sectional shape cut by a plane orthogonal to the axial direction, and is formed so that the diameter gradually decreases from the intermediate plate 12 toward the outer plate 11. Has been.

  In the seventh embodiment, the vibration impedance is varied by changing the cross-sectional shape of the second support member 81, but the present invention is not limited to this configuration. For example, the vibration impedance may be made different by changing the material constituting the second support member 81, or if the vibration impedance is made different by changing both the material and the cross-sectional shape of the second support member 81. It may be allowed.

[Embodiment 8]
Next, a soundproof structure 90 according to Embodiment 8 will be described with reference to FIG. FIG. 13: is typical sectional drawing of the soundproof structure of the wall board which concerns on Embodiment 8. FIG. In the eighth embodiment, portions that are different from the first to seventh embodiments will be described in order to avoid redundant description, and portions that have the same configuration as those of the first to seventh embodiments will be described with the same reference numerals.

  The soundproof structure 90 according to the eighth embodiment has a single structure with the first support member 13, the second support member 14, and the intermediate plate 71 of the soundproof structure 70 according to the sixth embodiment having a compact structure. Specifically, the other end portion of the first support member 13 and the one end portion of the second support member 14 are overlapping portions that overlap in the axial direction. A leaf spring 91 is used as an intermediate plate that connects the first support member 13 and the second support member 14. For this reason, the leaf | plate spring 91 is attenuate | damping the sound propagated from the 1st support member 13 by functioning as an elastic part.

  As described above, according to the eighth embodiment, by using the leaf spring 91 as the intermediate plate, the leaf spring 91 can function as an elastic portion, so that the elastic portion can be configured more simply.

  In the eighth embodiment, the leaf spring 91 is used as the intermediate plate. However, for example, the configuration shown in FIG. FIG. 14 is a schematic cross-sectional view of another example of the soundproof structure of a wall board according to the eighth embodiment. That is, as shown in FIG. 14, instead of the leaf spring 91, a rubber material 92 that is an elastic body may be applied as an intermediate plate.

[Embodiment 9]
Next, a soundproof structure according to Embodiment 9 will be described with reference to FIG. FIG. 15: is a typical fragmentary sectional view of the soundproof structure of the wall board which concerns on Embodiment 9. FIG. In the ninth embodiment, parts different from the first to eighth embodiments will be described in order to avoid redundant descriptions, and parts having the same configurations as those of the first to eighth embodiments will be described with the same reference numerals.

  In the ninth embodiment, in addition to the configurations of the first to eighth embodiments, a nut 17 that is fastened to the outer plate 11 and a soundproof member 100 that covers the outer end of the second support member 14 are further provided. As shown in FIG. 15, the soundproofing member 100 is configured using, for example, a solid metal material or a rubber material, and an outer surface thereof is formed in a hemispherical surface. On the other hand, the soundproofing member 100 has an inner surface formed in a shape complementary to the outer shape of the nut 17 and the outer end portion of the second support member 14, and is slightly in a portion in contact with the outer end portion of the second support member 14. It is formed so that a space is provided.

  As described above, according to the ninth embodiment, since the outer end portion of the stud bolt that is the second support member 14 protruding from the outer plate 11 can be covered with the soundproof member 100, the soundproof structures 10, 30, The soundproof performance of 40, 50, 60, 70, 80, 90 can be further enhanced.

  In addition, the soundproof member 100 of Embodiment 9 is good also as the soundproof member 101 shown in FIG. 16, for example. FIG. 16: is a typical fragmentary sectional view of the soundproof structure of the wall board of another example which concerns on Embodiment 9. FIG. The soundproof member 101 shown in FIG. 16 is provided with an air layer 102 therein. Here, in the case where the air layer 102 is provided inside, in order to increase the volume of the soundproofing member 101, the soundproofing member 101 may be formed in a cylindrical shape. According to this configuration, since the propagation of vibration can be further suppressed in the air layer 102, the soundproof performance of the soundproof member 101 itself can be enhanced.

DESCRIPTION OF SYMBOLS 1 Wall board 10 Soundproof structure 11 Outer plate 12 Intermediate | middle board 13 1st support member 14 2nd support member 15 Sound absorption material 17 Nut 21 Slit 30 Soundproof structure (Embodiment 2)
31 Leaf spring 40 Soundproof structure (Embodiment 3)
41 Leaf spring 50 Soundproof structure (Embodiment 4)
51 Leaf Spring 52 Wedge Structure 60 Soundproof Structure (Embodiment 5)
61 Curved leaf spring 70 Soundproof structure (Embodiment 6)
71 Intermediate plate 80 Soundproof structure (Embodiment 7)
81 Second Support Member 82 Second Support Member 90 Soundproof Structure (Embodiment 8)
91 Leaf spring 92 Rubber material 100 Soundproof member (Embodiment 9)
101 Soundproof member 102 Air layer

Claims (9)

An outer plate provided outside the wall plate constituting the flow path through which the fluid flows, and provided facing the wall plate;
An intermediate plate provided between the wall plate and the outer plate, and provided to face the wall plate and the outer plate;
A first support member having both ends connected to the wall plate and the intermediate plate,
A second support member having both ends connected to the intermediate plate and the outer plate,
A sound absorbing material provided between at least one of the wall plate and the intermediate plate and between the intermediate plate and the outer plate,
A connection portion between the first support member and the wall plate, a connection portion between the first support member and the intermediate plate, a connection portion between the second support member and the intermediate plate, the second support member and the outside At least one of the connecting portion with the plate and the intermediate plate is an elastic portion ,
The elastic part is
A first leaf spring provided at a connection portion between the first support member and the wall plate, connected to the wall plate so as to be elastically deformable, and connected to an end portion of the first support member;
A second leaf spring provided at a connection portion between the first support member and the intermediate plate, connected to the intermediate plate so as to be elastically deformable, and connected to an end portion of the first support member;
A third leaf spring provided at a connection portion between the second support member and the intermediate plate, connected to the intermediate plate so as to be elastically deformable, and connected to an end portion of the second support member;
A fourth leaf spring provided at a connection portion between the second support member and the outer plate, connected to the outer plate so as to be elastically deformable, and connected to an end portion of the second support member. A soundproof structure for a wall plate, characterized in that it is at least one leaf spring . The soundproof structure for a wall plate according to claim 1 , wherein the leaf spring is in sliding contact with another member during elastic deformation. The leaf spring, the wall plate, said intermediate plate and through the wedge structure for mounting with an inclination with respect to the plate surface of the outer plate, according to claim 1, characterized in that connected to the plate surface The soundproof structure of the wall board described in 2. The leaf spring has a curved portion that is curved between both end portions, and one of the wall plates, the intermediate plate, and the outer plate is connected to one end portion, and the other end portion is connected to the other end portion. The soundproof structure for a wall plate according to claim 1 , wherein any one of the first support member and the second support member is connected. It said second support member, in the direction of propagation vibration is propagated, soundproofing structure wallboard according to any one of claims 1 to 4, characterized in that the vibration impedance is different. 6. The soundproof structure for a wall board according to claim 5 , wherein the second support member has a cross-sectional shape cut along a plane orthogonal to the propagation direction and a shape that is different toward the propagation direction. . The second support member is a stud bolt;
The stud bolt and the outer plate are connected by fastening a nut in a state where an outer end portion of the stud bolt protrudes outward from the outer plate,
The soundproof structure for a wall plate according to any one of claims 1 to 6 , further comprising a soundproof member that covers an outer end portion of the stud bolt and the nut. The soundproof structure for a wall board according to claim 7 , wherein the soundproof member is formed using an elastic material and has an air layer therein. An outer plate provided outside the wall plate constituting the flow path through which the fluid flows, and provided facing the wall plate;
An intermediate plate provided between the wall plate and the outer plate, and provided to face the wall plate and the outer plate;
A first support member having both ends connected to the wall plate and the intermediate plate,
A second support member having both ends connected to the intermediate plate and the outer plate,
A sound absorbing material provided between at least one of the wall plate and the intermediate plate and between the intermediate plate and the outer plate;
A soundproofing member that covers the outside of the connecting portion between the second support member and the outer plate,
The second support member is a stud bolt;
The stud bolt and the outer plate are connected by fastening a nut in a state where an outer end portion of the stud bolt protrudes outward from the outer plate,
The soundproof member, the stud bolt of the outer end and Utotomoni covering the nut, is formed by using an elastic material, soundproof structures wallboard and having an air layer therein.

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