Sound insulation wall constituent member and wall structure

Abstract

Provided are a sound insulation wall constituent member and a wall structure which make it possible to easily constitute a sound insulation wall having a main surface member supported by a support member while assuredly suppressing transmission of vibration generated in the main surface member to the support member.　A sound insulation wall constituent member (3) comprises: a pair of support members (4) that extend in a first direction (D1) and are disposed apart from each other in a second direction (D2) to support main surface members (2); a pair of elastic members (5) that are provided on lateral surfaces of each of the pair of support members (4) in a third direction (D3); a pair of extension parts (7) that have free end pieces (71) positioned between the pair of support members (4); and auxiliary surface members (8) that are attached to the pair of extension parts (7) in a state of covering the free end pieces (71). A member lateral surface (51) of each of the pair of elastic members (5) that faces the corresponding main surface member (2) side in the third direction (D3) is disposed on the same plane as a surface-member lateral surface (81) of the corresponding one of the auxiliary surface members (8) that faces the main surface member (2) side in the third direction (D3).

Description

Title of Invention SOUND INSULATION WALL COMPONENT MEMBER AND WALL STRUCTURE Technical Field

[0001] The present invention relates to a sound insulation wall component member and a wall structure. Background Art

[0002] As a wall structure of a building, for example, Patent Literature 1 discloses a partition wall. The partition wall disclosed in Patent Literature 1 includes a reinforcement material support attached to a stud for supporting a building interior board, and a lateral joint reinforcement engageable with the reinforcement material support.

[0003] The partition wall disclosed in Patent Literature 1 has a problem that vibration generated in the building interior board is transmitted to the stud. That is, in the partition wall disclosed in Patent Literature 1, there is room for improvement in reliably suppressing vibration generated in the building interior board to improve sound insulation performance. Citation List Patent Literature

[0004] Patent Literature 1: JP 2000-297492 A Summary of Invention

[0005] An object of the present invention is to provide a sound insulation wall component member and a wall structure capable of easily constituting a sound insulation wall having a main surface material supported by a support member while reliably suppressing transmission of vibration generated in the main surface material to the support member.

[0006] A sound insulation wall component member according to an aspect of the present invention is a sound insulation wall component member for constituting a sound insulation wall having a main surface material. This sound insulation wall component member includes a pair of support members extending in a first direction to support the main surface material and disposed apart from each other in a second direction orthogonal to the first direction, a pair of elastic members respectively provided on side surfaces of the pair of support members, the side surfaces facing one side in a third direction orthogonal to the first direction and the second direction, the pair of elastic members having an elastic portion having elasticity higher than elasticity of the pair of support members, a pair of extensions each extending from one of the pair of support members toward another one of the pair of support members along the second direction and each having a free end positioned between the pair of support members, and an auxiliary surface material attached to the pair of extensions across the pair of extensions in a state in which the pair of elastic members is in an open state to one side in the third direction and the free end of each of the pair of extensions is covered from one side in the third direction. The elastic portion has a deformation allowable distance set in advance as a distance in the third direction at which elastic deformation is allowed. A member side surface facing one side in the third direction of the pair of elastic members is disposed on the same plane as a surface material side surface facing one side in the third direction of the auxiliary surface material or protrudes from the surface material side surface toward one side in the third direction by a distance smaller than the deformation allowable distance.

[0007] A wall structure according to another aspect of the present invention includes a main surface material, and the sound insulation wall component member for constituting a sound insulation wall having the main surface material.

[0008] As described above, the present invention can provide a sound insulation wall component member and a wall structure capable of easily constituting a sound insulation wall having a main surface material supported by a support member while reliably suppressing transmission of vibration generated in the main surface material to the support member. Brief Description of Drawings

[0009] FIG. 1 is a perspective view of a wall structure to which a sound insulation wall component member according to an embodiment of the present invention is applied. FIG. 2 is a sectional view of the sound insulation wall component member taken along line 1I-II in FIG. 1. FIG. 3 is a sectional view illustrating a state before a main surface material is attached to a pair of support members in the sound insulation wall component member. FIG. 4 is a sectional view illustrating a modification of an extension provided in the sound insulation wall component member. FIG. 5 is a perspective view for describing a construction procedure of the wall structure, and is a diagram illustrating a state in which the extension is attached to the support member. FIG. 6 is a perspective view for describing a construction procedure of the wall structure, and is a diagram illustrating a state in which the sound absorption material is attached to the extension and an elastic member is attached to the support member. FIG. 7 is a perspective view for describing a construction procedure of the wall structure, and is a diagram illustrating a state in which an auxiliary surface material is attached to the extension. FIG. 8 is a perspective view for describing a construction procedure of the wall structure, and is a diagram illustrating a state in which the main surface material is attached to the support member so as to cover the auxiliary surface material. FIG. 9 is a perspective view of a wall structure to which a sound insulation wall component member according to a modified embodiment is applied. FIG. 10 is a sectional view of the sound insulation wall component member taken along line X-X in FIG. 9. Description of Embodiments

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the following embodiment is an example embodying the present invention, and is not intended to limit the technical scope of the present invention. Hereinafter, a directional relationship will be described using a first direction DI, a second direction D2, and a third direction D3 orthogonal to each other. The first direction DI is a vertical direction perpendicular to a horizontal plane, and the second direction D2 and the third direction D3 are directions orthogonal to each other on the horizontal plane.

[0011] FIG. 1 is a perspective view of a wall structure 1 to which a sound insulation wall component member 3 according to an embodiment of the present invention is applied. FIG. 2 is a sectional view of the sound insulation wall component member 3. FIG. 3 is a sectional view illustrating a state before a main surface material 2 is attached to a pair of support members 4 in the sound insulation wall component member 3. The wall structure 1 is applied to, for example, a structure of a partition wall that partitions a space between a floor and a ceiling in a building into a first room and a second room. The wall structure 1 includes the main surface material 2 and the sound insulation wall component member 3 for constituting a sound insulation wall having the main surface material 2.

[0012] The main surface material 2 is constituted by, for example, plasterboard. In the wall structure 1, a plurality of main surface materials 2 are disposed side by side in the second direction D2 orthogonal to the first direction DI so as to form a joint 2A extending in the first direction DI. In the wall structure 1, two rows of the main surface materials 2 are provided apart from each other in the third direction D3 orthogonal to the first direction DI and the second direction D2. In this case, of the two rows of main surface materials 2, the main surface materials 2 in one row is provided so as to face the first room in the building, and the main surface materials 2 in the other row is provided so as to face the second room in the building.

[0013] The sound insulation wall component member 3 is a structure for constituting the sound insulation wall having the main surface material 2. The sound insulation wall component member 3 includes the pair of support members 4 for supporting the main surface materials 2 in each row disposed apart from each other in the third direction D3, a pair of elastic members 5, a pair of extensions 7, an auxiliary surface material 8, a sound absorption material 9, and a pair of runners 10.

[0014] In the following description, in a state where the main surface materials 2 in each row disposed apart from each other in the third direction D3 are attached to the pair of support members 4, a direction from the support members 4 toward the main surface materials 2 is referred to as “one side in the third direction D3”, and a direction from the main surface materials 2 toward the support members 4 is referred to as “the other side in the third direction D3”.

[0015] The pair of runners 10 is constituted by, for example, a steel material. The pair of runners 10 is frame-shaped positioning members that extend in the second direction D2 along the ceiling and the floor of the building and are disposed apart from each other in the first direction DI, and hold an end portion of each of the pair of support members 4 in the first direction DI. Each of the pair of runners 10 has a base 101 extending in the second direction D2 and a pair of erected portions 102 extending in the first direction DI from both ends in the third direction D3 which is a width direction of the base 101.

[0016] In the runner 10 disposed on an upper side in the first direction DI out of the pair of runners 10 separated in the first direction DI, the base 101 covers upper end portions of the pair of support members 4 from the upper side, and the pair of erected portions 102 extends from the base 101 to a lower side in the first direction DI so as to restrict movement of the base 101 in the third direction D3. In the runner 10 on the upper side, the upper end portion of the main surface material 2 in the first direction DI abuts on an erected portion side surface 1021 facing the one main surface material 2 in the third direction D3 of the pair of erected portions 102.

[0017] In the runner 10 disposed on a lower side in the first direction DI out of the pair of runners 10 separated in the first direction DI, the base 101 covers lower end portions of the pair of support members 4 from the lower side, and the pair of erected portions 102 extends from the base 101 to an upper side in the first direction DI so as to restrict movement of the base 101 in the third direction D3. In the runner 10 on the lower side, the lower end portion of the main surface material 2 in the first direction DI abuts on the erected portion side surface 1021 facing the one main surface material 2 in the third direction D3 of the pair of erected portions 102.

[0018] A pair of support members 4 extending in the first direction DI and disposed apart from each other in the second direction D2 is erected between the pair of runners 10 apart from each other in the first direction DI in order to support the main surface material 2. Each of the pair of support members 4 is constituted by, for example, a steel material. The pair of support members 4 is a common support member 4 configured to commonly support the main surface materials 2 in each row disposed apart from each other in the third direction D3. Note that the pair of support members 4 may be individual support members 4 configured to individually support, for each row, the main surface materials 2 in each row disposed apart from each other in the third direction D3. The sectional shape of the pair of support members 4 is not limited, and is, for example, a C-shaped sectional shape.

[0019] The pair of support members 4 supports the main surface material 2 on side surfaces facing the one main surface material 2 in the third direction D3. One side surface of the pair of support members 4 in the third direction D3 has an edge support side surface that supports an edge portion along the joint 2A of the two main surface materials 2 adjacent in the second direction D2, and a remaining portion support side surface that supports a remaining portion other than the edge portion of the main surface material 2.

[0020] The pair of elastic members 5 is provided between the main surface material 2 and the pair of support members 4 in the third direction D3. The pair of elastic members 5 is respectively provided on side surfaces of the pair of support members 4 facing the main surface material 2 on one side in the third direction D3. That is, the elastic member 5 is provided on the edge support side surface and the remaining portion support side surface of the pair of 4 support members 4. The pair of elastic members 5 extends in the first direction DI across the pair of runners 10 on the one side surface of the pair of support members 4 in the third direction D3. The pair of elastic members 5 is a member having an elastic portion 50 having a smaller elastic modulus (Young’s modulus) and a higher elasticity than the main surface material 2 and the support member 4, and is constituted by, for example, an elastic polyurethane material, a rubber material, a polyethylene material having closed cells, or the like. The elastic portion 50 has a deformation allowable distance set in advance as a distance in the third direction D3 at which elastic deformation is allowed. The pair of elastic members 5 suppresses vibration transmission between the main surface material 2 and the support member 4 by elastic deformation of the elastic portion 50 in the third direction D3 based on the deformation allowable distance.

[0021] As illustrated in FIG. 2, the elastic member 5 provided on the edge support side surface of the pair of support members 4 is provided with a coupling member 6 so as to cover a member side surface 51 facing the one main surface material 2 in the third direction D3 of the elastic member 5. The coupling member 6 extends in the first direction DI between the pair of runners 10 in a state of covering the member side surfaces 51 of the elastic member 5 between the edge portions along the joint 2A of the two main surface materials 2 adjacent in the second direction D2 and the elastic member 5 provided on the edge support side surfaces of the pair of support members 4. The coupling member 6 has a protrusion 61 that protrudes toward the one main surface material 2 in the third direction D3 and extends in the first direction DI. The coupling member 6 is provided such that the protrusion 61 is inserted into the joint 2A of the two main surface materials 2 adjacent in the second direction D2. In this case, the protrusion 61 of the coupling member 6 is accommodated in the joint 2A, and is restricted from protruding outward from the main surface material 2. Since the coupling member 6 has a large second moment of area by providing the protrusion 61, the rigidity of the coupling member 6 itself is enhanced. Note that the coupling member 6 does not have the protrusion 61 in some cases.

[0022] The edge portions along the joint 2A of the two main surface materials 2 adjacent to each other in the second direction D2 are fixed to the edge support side surfaces of the pair of support members 4 by a screw member SC in a state where the elastic member 5 and the coupling member 6 are interposed. In this case, the edge portions along the joint 2A of the two main surface materials 2 adjacent in the second direction D2 can be coupled to each other by the coupling member 6 through which the screw member SC penetrates together with the elastic member 5. Therefore, a relative movement of the edge portion of each main surface material 2 can be restricted to suppress generation of unevenness on the sound insulation wall constituted by each main surface material 2.

[0023] On the other hand, the remaining portion other than the edge portion of the main surface material 2 is fixed to the remaining portion support side surfaces of the pair of support members 4 by an adhesive layer AD including an adhesive in a state where the elastic member 5 is interposed. In this case, the main surface material 2 can be fixed to the support member 4 in a 5 state where the screw member SC that can be a vibration propagation path is removed between the remaining portion other than the edge portion of the main surface material 2 and the support member 4. As a result, it is possible to effectively suppress vibration transmission between the remaining portion other than the edge portion of the main surface material 2 and the support member 4. Note that the adhesive layer AD is configured by applying an adhesive in a dot shape or attaching a tape-shaped material to which an adhesive is applied to the remaining portion support side surfaces of the pair of support members 4.

[0024] Furthermore, the pair of extensions 7 is provided on the side surfaces of the pair of support members 4 facing the one main surface material 2 in the third direction D3. That is, the pair of extensions 7 is respectively provided on side surfaces of the pair of support members 4 on one side in the third direction D3. A plurality of sets of the pair of extensions 7 may be disposed apart from each other in the first direction DI on the pair of support members 4. The pair of extensions 7 includes a flat plate-shaped extension body 70 that is in contact with one side surface of the pair of support members 4 in the third direction D3, and a pair of free end pieces 71 that each extends from the extension 7 to both sides in the second direction D2. One free end piece 71 of the pair of free end pieces 71 is positioned between the pair of support members 4 in the second direction D2. The pair of elastic members 5 is provided on one side surface of the pair of support members 4 in the third direction D3 so as to cover the extension body 70 of the pair of extensions 7.

[0025] The auxiliary surface material 8 is attached to the free end pieces 71 in the pair of extensions 7. The auxiliary surface material 8 is constituted by, for example, plasterboard similarly to the main surface material 2. The auxiliary surface material 8 is attached to the free end piece 71 across the pair of extensions 7 in a state where the pair of elastic members 5 is in an open state to the one main surface material 2 in the third direction D3 and the free end piece 71 of the pair of extensions 7 is covered from one side in the third direction D3. The auxiliary surface material 8 is attached to the free end piece 71 of the pair of extensions 7 by, for example, the screw member SC.

[0026] As illustrated in FIG. 3, in a state before the main surface material 2 is attached to the pair of support members 4, in a state where the auxiliary surface material 8 is attached to the free end piece 71 of the pair of extensions 7, the member side surface 51 facing the one main surface material 2 in the third direction D3 in the pair of elastic members 5 is disposed on the same plane as a surface material side surface 81 facing the one main surface material 2 in the third direction D3 in the auxiliary surface material 8. Alternatively, the member side surface 51 of the pair of elastic members 5 protrudes from the surface material side surface 81 of the auxiliary surface material 8 toward one side in the third direction D3 by a distance smaller than the deformation allowable distance of the elastic portion 50. In a state where the coupling member 6 covers the member side surface 51 of the elastic member 5, an upper limit of a protrusion distance allowed in a case where the member side surface 51 of the elastic member 5 protrudes from the surface material side surface 81 of the auxiliary surface material 8 is set to, for example, a distance obtained by subtracting a remaining thickness of the elastic portion 50 from a thickness of the auxiliary surface material 8. The remaining thickness of the elastic portion 50 is obtained by adding a thickness of the elastic member 5 and a thickness of the coupling member 6.

[0027] In the sound insulation wall component member 3, after the main surface material 2 is attached to the pair of support members 4 via the member side surface 51 of the pair of elastic members 5, the member side surface 51 of the elastic member 5 and the surface material side surface 81 of the auxiliary surface material 8 are disposed on the same plane along a surface of the main surface material 2. In a state where the coupling member 6 covers the member side surface 51 of the elastic member 5, a surface of the coupling member 6 facing one side in the third direction D3 is disposed on the same plane as the surface material side surface 81 of the auxiliary surface material 8. Here, in a state before the main surface material 2 is attached to the pair of support members 4, the member side surface 51 of the elastic member 5 is on the same plane as the surface material side surface 81 of the auxiliary surface material 8 or protrudes from the surface material side surface 81 by a distance smaller than the deformation allowable distance of the elastic portion 50. Therefore, in a state where the main surface material 2 is attached to the support member 4, at least a part of the deformation allowable distance of the elastic portion 50 can be left. Therefore, the elastic deformation of the elastic portion 50 in the third direction D3 can be allowed in a state where the main surface material 2 is attached, and the vibration transmission from the main surface material 2 to the support member 4 can be suppressed by the elastic deformation.

[0028] Furthermore, in the sound insulation wall component member 3, the pair of extensions 7 has the free end piece 71 disposed between the pair of support members 4, and the auxiliary surface material 8 is attached to the extension 7 so as to cover the free end piece 71 and put the elastic member 5 in an open state. Therefore, vibration to the support member 4 from the auxiliary surface material 8 that comes into contact with the main surface material 2 in a state where the main surface material 2 is attached is allowed, and thus, vibration of the main surface material 2 at a coincidence frequency can be suppressed as compared with a case where the auxiliary surface material 8 does not exist. Furthermore, by combining the main surface material 2 and the auxiliary surface material 8, a surface density of the sound insulation wall is improved. Here, in order to suppress vibration propagation at the coincidence frequency of the main surface material 2, for example, it is conceivable to attach the auxiliary surface material 8 to the main surface material 2 in advance. However, in this case, it is necessary to lift the main surface material 2 with the auxiliary surface material 8 and attach the main surface material 2 to the support member 4, which makes workability poor. On the other hand, in the above configuration, since the auxiliary surface material 8 can be left on the support member 4 via the extension 7, the sound insulation wall having the main surface material 2 can be easily configured.

[0029] In a case where the main surface material 2 with the auxiliary surface material 8 is attached to the pair of support members 4 via the member side surface 51 of the pair of elastic members 5, the entire main surface material 2 with the auxiliary surface material 8 is disposed outside of the member side surface 51 of the elastic member 5. Therefore, a wall thickness of a portion of the sound insulation wall by the main surface material 2 with the auxiliary surface material 8 disposed outside of the member side surface 51 of the elastic member 5 increases. On the other hand, in the above configuration, the auxiliary surface material 8 is attached to the free end piece 71 of the extension 7 disposed between the pair of support members 4 so as to put the elastic member 5 in an open state. In this case, in a state after the main surface material 2 is attached to the pair of support members 4 via the member side surface 51 of the pair of elastic members 5, the member side surface 51 of the elastic member 5 and the surface material side surface 81 of the auxiliary surface material 8 are disposed on the same plane along the surface of the main surface material 2, and the auxiliary surface material 8 is disposed further inward than the main surface material 2 with respect to the member side surface 51 of the elastic member 5. Therefore, it is possible to suppress the wall thickness of the portion of the sound insulation wall disposed outside the member side surface 51 of the elastic member 5 from increasing.

[0030] As illustrated in FIG. 2, the end portion of the main surface material 2 in the first direction DI is in contact with the erected portion side surface 1021 facing the one main surface material 2 in the third direction D3 of the pair of erected portions 102 in the pair of runners 10. The erected portion side surface 1021 of the erected portion 102 of the pair of runners 10 is disposed on the same plane as the surface material side surface 81 of the auxiliary surface material 8. In this case, when the main surface material 2 is attached to the support member 4 in a state where the erected portion 102 and the auxiliary surface material 8 of the pair of runners 10 are covered from one side in the third direction D3, it is possible to prevent the generation of the unevenness on the main surface material 2 in which the end portion in the first direction DI abuts on the erected portion side surface 1021.

[0031] As illustrated in FIG. 2, the sound insulation wall component member 3 may include the sound absorption material 9. The sound absorption material 9 is attached to the free end piece 71 across the pair of extensions 7 in a state of covering the free end piece 71 in the pair of extensions 7 from the side of the other support member 4 in the third direction D3. In this case, the pair of extensions 7 for attaching the auxiliary surface material 8 can also be used as portions for holding the sound absorption material 9.

[0032] FIG. 4 is a sectional view illustrating a modification of the pair of extensions 7 provided in the sound insulation wall component member 3. The pair of extensions 7 may have an extending piece 72 in addition to the extension body 70 and the free end piece 71. The extending piece 72 extends from the extension body 70 in the second direction D2 so as to be disposed at a position separated from the free end piece 71 in the third direction D3. The extending piece 72 may extend from the extension body 70 to both sides in the second direction D2, or may extend from the extension body 70 to one side in the second direction D2. The pair of extensions 7 can sandwich an end portion of the auxiliary surface material 8 in the second direction D2 between the free end piece 71 and the extending piece 72.

[0033] A construction procedure of the wall structure 1 will be described with reference to FIGS. 5 to 8. First, as illustrated in FIG. 5, the pair of extensions 7 is attached to the pair of support members 4 erected between the pair of runners 10. In this case, a plurality of sets of the pair of extensions 7 may be attached to the pair of support members 4 apart from each other in the first direction DI.

[0034] Next, as illustrated in FIG. 6, the pair of elastic members 5 is attached to the pair of support members 4, and the sound absorption material 9 is attached to the pair of extensions 7. Next, as illustrated in FIG. 7, the auxiliary surface material 8 is attached to the pair of extensions 7. In a state where the auxiliary surface material 8 is attached to the pair of extensions 7, an adhesive is applied in a dot shape to the surface of the auxiliary surface material 8 on one side in the third direction D3 to form the adhesive layer AD. An adhesive is applied in a dot shape to the elastic member 5 attached to the remaining portion support side surface that supports the remaining portion other than the edge portion of the main surface material 2 on one side surface of the pair of support members 4 in the third direction D3 to form the adhesive layer AD.

[0035] Next, as illustrated in FIG. 8, the main surface material 2 is attached to the pair of support members 4 so as to cover the auxiliary surface material 8. In this case, the edge portions along the joint 2A of the two main surface materials 2 adjacent to each other in the second direction D2 are fixed to the edge support side surfaces of the pair of support members 4 by the screw member SC in a state where the elastic member 5 and the coupling member 6 are interposed. In this case, the edge portions along the joint 2A of the two main surface materials 2 adjacent in the second direction D2 can be coupled to each other by the coupling member 6 through which the screw member SC penetrates together with the elastic member 5. Therefore, a relative movement of the edge portion of each main surface material 2 can be restricted to suppress generation of unevenness on the sound insulation wall constituted by each main surface material 2. On the other hand, the remaining portion other than the edge portion of the main surface material 2 is fixed to the remaining portion support side surfaces of the pair of support members 4 by the adhesive layer AD in a state where the elastic member 5 is interposed.

[0036] When the main surface material 2 is attached to the pair of support members 4 so as to cover the auxiliary surface material 8, the auxiliary surface material 8 can be left on the support member 4 via the pair of extensions 7, and thus, the sound insulation wall having the main surface material 2 can be easily configured.

[0037] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, the following modified embodiment may be adopted.

[0038] FIG. 9 is a perspective view of the wall structure 1 to which a sound insulation wall component member 3 according to the modified embodiment is applied, and FIG. 10 is a sectional view of the sound insulation wall component member 3. The sound insulation wall component member 3 according to the modified embodiment is the same as that of the above embodiment except that a configuration of a pair of extensions 7A is different. Therefore, in 9 the sound insulation wall component member 3 according to the modified embodiment, the description of the same portion as that of the above embodiment will be omitted, and the configuration of the pair of extensions 7A will be described in detail.

[0039] The pair of extensions 7A is respectively provided on surfaces of the pair of support members 4 facing the second direction D2. In this case, the pair of extensions 7A may be provided on the surfaces of the pair of support members 4 facing the second direction D2 in a state where a spacer or the like is interposed. A plurality of sets of the pair of extensions 7A may be disposed apart from each other in the first direction DI on the pair of support members 4.

[0040] The pair of extensions 7A includes a flat plate-shaped extension body 70 in contact with surfaces of the pair of support members 4 facing the second direction D2, and a pair of free end pieces 71 extending from the extension 7A to one side in the second direction D2 and disposed apart from each other in the third direction D3. The pair of free end pieces 71 is positioned between the pair of support members 4 in the second direction D2, and is disposed on the other side in the third direction D3 with respect to the side surface of the pair of support members 4 on the one main surface material 2 side in the third direction D3.

[0041] The auxiliary surface material 8 is attached to the free end pieces 71 in the pair of extensions 7A. The auxiliary surface material 8 is attached to the free end piece 71 across the pair of extensions 7A in a state of putting the pair of elastic members 5 in an open state respectively provided on the side surfaces of the pair of support members 4 on the one main surface material 2 side in the third direction D3 and covering the free end piece 71 of the pair of extensions 7A from one side in the third direction D3.

[0042] In a state before the main surface material 2 is attached to the pair of support members 4, in a state where the auxiliary surface material 8 is attached to the free end piece 71 of the pair of extensions 7A, the member side surface 51 facing the one main surface material 2 in the third direction D3 in the pair of elastic members 5 is disposed on the same plane as the surface material side surface 81 facing the one main surface material 2 in the third direction D3 in the auxiliary surface material 8. Alternatively, the member side surface 51 of the pair of elastic members 5 protrudes from the surface material side surface 81 of the auxiliary surface material 8 toward one side in the third direction D3 by a distance smaller than the deformation allowable distance of the elastic portion 50. In this manner, the elastic deformation of the elastic portion 50 in the third direction D3 can be allowed in a state where the main surface material 2 is attached, and the vibration transmission from the main surface material 2 to the support member 4 can be suppressed by the elastic deformation.

[0043] Furthermore, in the sound insulation wall component member 3, the pair of extensions 7A has the free end piece 71 disposed between the pair of support members 4, and the auxiliary surface material 8 is attached to the extension 7A so as to cover the free end piece 71 and to put the elastic member 5 in an open state. Therefore, vibration to the support member 4 from the auxiliary surface material 8 that comes into contact with the main surface material 2 in a state where the main surface material 2 is attached is allowed, and thus, vibration of the main surface 10 material 2 at a coincidence frequency can be suppressed as compared with a case where the auxiliary surface material 8 does not exist.

[0044] When the main surface material 2 is attached to the pair of support members 4 so as to cover the auxiliary surface material 8, the auxiliary surface material 8 can be left on the support member 4 via the pair of extensions 7A, and thus, the sound insulation wall having the main surface material 2 can be easily configured.

[0045] The above-described specific embodiment mainly includes the invention having the following configurations.

[0046] A sound insulation wall component member according to an aspect of the present invention is a sound insulation wall component member for constituting a sound insulation wall having a main surface material. This sound insulation wall component member includes a pair of support members extending in a first direction to support the main surface material and disposed apart from each other in a second direction orthogonal to the first direction, a pair of elastic members respectively provided on side surfaces of the pair of support members, the side surfaces facing one side in a third direction orthogonal to the first direction and the second direction, the pair of elastic members having an elastic portion having elasticity higher than elasticity of the pair of support members, a pair of extensions each extending from one of the pair of support members toward another one of the pair of support members along the second direction and each having a free end positioned between the pair of support members, and an auxiliary surface material attached to the pair of extensions across the pair of extensions in a state in which the pair of elastic members is in an open state to one side in the third direction and the free end of each of the pair of extensions is covered from one side in the third direction. The elastic portion has a deformation allowable distance set in advance as a distance in the third direction at which elastic deformation is allowed. A member side surface facing one side in the third direction of the pair of elastic members is disposed on the same plane as a surface material side surface facing one side in the third direction of the auxiliary surface material or protrudes from the surface material side surface toward one side in the third direction by a distance smaller than the deformation allowable distance.

[0047] In the sound insulation wall component member, after the main surface material is attached to the pair of support members via the member side surface of the pair of elastic members, the member side surface of the elastic member and the surface material side surface of the auxiliary surface material are disposed on the same plane along a surface of the main surface material. Here, the member side surface of the elastic member is on the same plane as the surface material side surface of the auxiliary surface material or protrudes from the surface material side surface by a distance smaller than the deformation allowable distance. Therefore, in a state where the main surface material is attached to the support member, at least a part of the deformation allowable distance of the elastic portion can be left. Therefore, the elastic deformation of the elastic portion in the third direction can be allowed in a state where the main surface material is attached, and the vibration transmission from the main surface material to the 11 support member can be suppressed by the elastic deformation.

[0048] Furthermore, in the sound insulation wall component member, the pair of extensions has the free end disposed between the pair of support members, and the auxiliary surface material is attached to the extension so as to cover the free end and to put the elastic member in an open state. Therefore, the vibration to the support member from the auxiliary surface material that comes into contact with the main surface material in a state where the main surface material is attached is allowed, and thus, the vibration of the main surface material at the coincidence frequency can be reduced as compared with a case where the auxiliary surface material does not exist. Furthermore, by combining the main surface material and the auxiliary surface material, a surface density of the sound insulation wall is improved. Here, in order to reduce vibration at the coincidence frequency of the main surface material, for example, it is conceivable to attach the auxiliary surface material to the main surface material in advance. However, in this case, it is necessary to lift the main surface material with the auxiliary surface material and attach the main surface material to the support member, which makes workability poor. On the other hand, in the above configuration, since the auxiliary surface material can be left on the support member via the extension, the sound insulation wall can be easily configured.

[0049] In a case where the main surface material with the auxiliary surface material is attached to the pair of support members via the member side surface of the pair of elastic members, the entire main surface material with the auxiliary surface material is disposed outside of the member side surface of the elastic member. Therefore, a wall thickness of a portion of the sound insulation wall by the main surface material with the auxiliary surface material disposed outside of the member side surface of the elastic member increases. On the other hand, in the above configuration, the auxiliary surface material is attached to the free end of the extension portion disposed between the pair of support members so as to put the elastic member in an open state. In this case, in a state after the main surface material is attached to the pair of support members via the member side surface of the pair of elastic members, the member side surface of the elastic member and the surface material side surface of the auxiliary surface material are disposed on the same plane along the surface of the main surface material, and the auxiliary surface material is disposed further inward than the main surface material with respect to the member side surface of the elastic member. Therefore, it is possible to suppress the wall thickness of the portion of the sound insulation wall disposed outside the member side surface of the elastic member from increasing.

[0050] The sound insulation wall component member may further include a sound absorption material attached to the pair of extensions across the pair of extensions in a state of covering the pair of extensions from another side in the third direction. [0051 ] In the sound insulation wall component member, the pair of extensions for attaching the auxiliary surface material can also be used as portions for holding the sound absorption material.

[0052] The sound insulation wall component member may further include a positioning member including a base that covers an end portion of the pair of support members from one side in the 12 first direction, and an erected portion that rises from the base in the first direction to restrict movement of the base toward one side in the third direction. In this case, an erected portion side surface facing one side in the third direction of the erected portion is disposed on the same plane as the surface material side surface.

[0053] In the sound insulation wall component member, since the erected portion side surface of the erected portion of the positioning member and the surface material side surface of the auxiliary surface material are disposed on the same plane, when the main surface material is attached to the support member in a state where the erected portion and the auxiliary surface material are covered from one side in the third direction, it is possible to prevent generation of unevenness on the main surface material.

[0054] A wall structure according to another aspect of the present invention includes a main surface material, and the sound insulation wall component member for constituting a sound insulation wall having the main surface material.

[0055] In the wall structure, since the sound insulation wall component member is provided, the wall structure capable of improving sound insulation performance can be easily configured.

Claims

1. A sound insulation wall component member for constituting a sound insulation wall having a main surface material, the sound insulation wall component member comprising:a pair of support members extending in a first direction to support the main surface material and disposed apart from each other in a second direction orthogonal to the first direction;a pair of elastic members respectively provided on side surfaces of the pair of support members, the side surfaces facing one side in a third direction orthogonal to the first direction and the second direction, the pair of elastic members having an elastic portion having elasticity higher than elasticity of the pair of support members;a pair of extensions each extending from one of the pair of support members toward another one of the pair of support members along the second direction and each having a free end positioned between the pair of support members; andan auxiliary surface material attached to the pair of extensions across the pair of extensions in a state in which the pair of elastic members is in an open state to one side in the third direction and the free end of each of the pair of extensions is covered from one side in the third direction, whereinthe elastic portion has a deformation allowable distance set in advance as a distance in the third direction at which elastic deformation is allowed, anda member side surface facing one side in the third direction of the pair of elastic members is disposed on a same plane as a surface material side surface facing one side in the third direction of the auxiliary surface material or protrudes from the surface material side surface toward one side in the third direction by a distance smaller than the deformation allowable distance.

2. The sound insulation wall component member according to claim 1, further comprising a sound absorption material attached to the pair of extensions across the pair of extensions in a state of covering the pair of extensions from another side in the third direction.

3. The sound insulation wall component member according to claim 1 or 2, further comprising a positioning member including a base that covers an end portion of the pair of support members from one side in the first direction, and an erected portion that rises from the base in the first direction to restrict movement of the base toward one side in the third direction, whereinan erected portion side surface facing one side in the third direction of the erected portion is disposed on the same plane as the surface material side surface.

4. A wall structure comprising:a main surface material; andthe sound insulation wall component member according to any one of claims 1 to 3, the sound insulation wall component member for constituting a sound insulation wall having the main surface material.

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