Sound insulation structure for building gaps

Abstract

To efficiently prevent noise such as sound leakage passing through a gap while securing the gap for countermeasures against shaking of a building, prevent damage to a gap sound insulation structure due to the shaking of the building, and efficiently construct the gap sound insulation structure.SOLUTION: The present invention relates to a gap sound insulation structure in which a gap 4 formed between one and the other partitions 2 and 3 of a room 1 of a building blocks transmission of sound. The gap sound insulation structure includes a sheet material 10 extending along a longitudinal direction of the gap 4 inside the room 1. The sheet material 10 includes a sheet material main body 11 configured to be mainly made of rock wool. A central portion 11a in a width direction of the sheet material 10 is arranged so as to straddle the gap 4 in a movable state with respect to inner surfaces 2a and 3a of the one and the other partitions 2 and 3 facing the inside of the room 1. Both edges 11b and 11c of the sheet material 10 in the width direction are fixed to the inner surfaces 2a and 3a of the one and the other partitions 2 and 3, respectively.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a gap sound insulation structure configured to block sound transmission in a gap formed between one partition body that is a ceiling or an inner wall of a room in a building and the other partition body that is an inner wall adjacent to the one partition body.

Background Art

[0002] When a building such as a high-rise building, a multiplex cinema, or a complex facility sways greatly due to the influence of wind, earthquake, etc., there is a risk that the ceiling or inner wall of the room and the inner wall adjacent thereto may be strongly pressed against each other, and as a result, they may be damaged. Therefore, it may be required to provide a gap between the ceiling or inner wall of the room and the inner wall adjacent thereto.

[0003] However, when there is a gap between the ceiling or inner wall and the inner wall adjacent thereto, sound leakage occurs between the inside and outside of the room through this gap. Therefore, in order to prevent such sound leakage, a gap sound insulation structure for blocking sound transmission in the gap is installed.

[0004] Examples of the gap sound insulation structure of a building generally include the following. As a first example, there is a gap sound insulation structure in which a gap (labyrinth gap) extending in a labyrinth shape such as a hat shape extends from the inside of the room to the outside, and glass wool is installed in the middle part in the extending direction of this gap. (See Non-Patent Document 1.) As a second example, there is a gap sound insulation structure in which the gap extends linearly from the inside of the room to the outside, and a porous material having continuous air bubbles is embedded in the gap. (See Patent Document 1.)

[0005] As a third example, there is a gap sound insulation structure in which the gap extends linearly from the inside of the room to the outside, an inflate seal is embedded in the gap, and the inflate seal has an elastic hollow tube-shaped part that is pressed against one surface defining the gap in the width direction and a base part that is fixed to the other surface defining the gap in the width direction. (See Patent Document 2.)

Prior Art Documents

Patent Document

[0006]

Patent Document 1

Patent Document 2

Non - Patent Document

[0007]

Non - Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, when a building sways greatly due to the influence of wind, earthquake, etc., the gap between the ceiling or inner wall of a room and the inner wall adjacent to it varies significantly. In the gap sound insulation structure of the first example above, when the gap varies significantly in this way, it is necessary to increase the width of the gap extending in a labyrinth shape so as to prevent contact between the ceiling or inner wall and the inner wall adjacent to it. This becomes a constraint on architectural design and makes construction difficult.

[0009] In the gap sound insulation structure of the second example above, when the gap varies significantly, there is a risk that the porous material may be damaged, and there is also a risk that the porous material may fall off from the gap. In this case, there is a risk of sound leakage at the damaged or fallen - off location of the porous material. And in order to repair such a damaged or fallen - off location of the porous material, extremely extensive work such as disassembling the ceiling or inner wall is required.

[0010] In the gap sound insulation structure of the third example above, when the gap varies significantly, there is a risk that the hollow tube - shaped part of the inflate seal and one side of the gap may rub against each other, generating an unpleasant rubbing sound.

[0011] In view of such circumstances, in a gap sound insulation structure, while ensuring a gap for countermeasures against building sway, it is desired to efficiently prevent noise such as sound leakage passing through this gap, prevent damage to the gap sound insulation structure due to building sway, and enable efficient construction of the gap sound insulation structure.

Means for Solving the Problems

[0012] In order to solve the above problems, a gap sound insulation structure according to one aspect is a gap sound insulation structure configured to block sound transmission in a gap formed between one partition body that is the ceiling or inner wall of a room in a building and the other partition body that is the inner wall of the room adjacent to the one partition body, and includes a sheet material extending along the longitudinal direction of the gap inside the room. The in-plane direction along the inner surface of the one partition body and the in-plane direction along the inner surface of the other partition body intersect to form a corner protruding from the inside of the room toward the outside of the room, and the width of the gap, which is the shortest distance between the one and the other partition bodies, is in the range of 10 mm or more and 40 mm or less. The sheet material has a sheet material main body configured with rock wool as the main material. The thickness of the sheet material is in the range of 15 mm or more and 70 mm or less. The central portion in the width direction of the sheet material is arranged to straddle the gap in a movable state with respect to the inner surfaces of the one and the other partition bodies facing the inside of the room. and it is bent in one mountain shape protruding from the gap toward the inside of the room at the inner surfaces of the one and the other partition bodies. The mountain shape at the central portion of the sheet material is formed such that two slopes from the top of the mountain shape toward the bottom of the mountain shape are curved from the outside of the mountain shape toward the inside of the mountain shape. The width direction of the sheet material One edge portion of is arranged at a distance from the gap in the in-plane direction along the inner surface of the one partition body and is fixed to the inner surface of the one partition body. Further, the other edge portion in the width direction of the sheet material is arranged at a distance from the gap in the in-plane direction along the inner surface of the other partition body and is fixed to the inner surface of the other partition body. .

Effects of the Invention

[0013] In a gap sound insulation structure according to one aspect, while ensuring a gap for countermeasures against building sway, it is possible to efficiently prevent noise such as sound leakage passing through this gap, prevent damage to the gap sound insulation structure due to building sway, and enable efficient construction of the gap sound insulation structure.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0015] The sound insulation structure for the gap of a building according to each of the first and second embodiments will be described below. The buildings to which the sound insulation structure for the gap according to each embodiment is applied can be high-rise buildings, multiplex cinemas, complex facilities, etc. The rooms of the buildings to which the sound insulation structure for the gap according to each embodiment is applied can be cinemas, halls, theaters, studios, etc. However, the buildings and their rooms are not limited to these.

[0016] "First Embodiment" The sound insulation structure for the gap according to the first embodiment will be described.

[0017] "Outline of the Sound Insulation Structure for the Gap" Referring to FIG. 1, the sound insulation structure for the gap according to the present embodiment is generally configured as follows. A room 1 of a building to which the sound insulation structure for the gap is applied has a ceiling or a first inner wall, i.e., one partition body 2. The room 1 has a first inner wall or a second inner wall, i.e., the other partition body 3, adjacent to the one partition body 2. That is, the one and the other partition bodies 2 and 3 are elements that partition the room 1. When the one partition body 2 is the ceiling, the other partition body 3 becomes the first or second inner wall. When the one partition body 2 is the first inner wall, the other partition body 3 becomes the second inner wall.

[0018] The room 1 has a gap 4 formed between the one and the other partition bodies 2 and 3. The sound insulation structure is configured to block the transmission of sound in this gap 4. The sound insulation structure has a sheet material 10 extending along the longitudinal direction of the gap 4 inside the room 1.

[0019] The sheet material 10 has a sheet material main body 11 configured with rock wool as the main material. The central portion 10a in the width direction of the sheet material 10 is arranged to straddle the gap 4 in a movable state with respect to the inner surfaces 2a and 3a of the one and the other partitioning bodies 2 and 3 facing the inside of the room 1. That is, the central portion 10a in the width direction of the sheet material 10 is not fixed to the inner surfaces 2a and 3a of the one and the other partitioning bodies 2 and 3. Both edge portions 10b and 10c in the width direction of the sheet material 10 are respectively fixed to the inner surfaces 2a and 3a of the one and the other partitioning bodies 2 and 3 facing the inside of the room 1.

[0020] In other words, one edge portion 10b in the width direction of the sheet material 10 is fixed to the inner surface 2a of the one partitioning body 2, and the other edge portion 10c in the width direction of the sheet material 10 is fixed to the inner surface 3a of the other partitioning body 3.

[0021] Furthermore, the gap sound insulation structure according to the present embodiment can be configured generally as follows. The central portion 10a in the width direction of the sheet material 10 is bent into one mountain shape protruding from the gap 4 toward the inside of the room 1. However, the central portion in the width direction of the sheet material can also be bent into one mountain shape protruding from the inside of the room toward the gap. The central portion in the width direction of the sheet material can also be bent along the inner surfaces of the one and the other partitioning bodies.

[0022] The sheet material 10 can have a sheet material cover 12 that covers the sheet material main body 11 from the inside of the room 1 side. The sheet material cover 12 is a member formed in a sheet shape. However, the sheet material cover can also be configured to cover the entire sheet material main body.

[0023] "Details of the Gap Sound Insulation Structure" Referring to FIG. 1, the gap sound insulation structure according to this embodiment can be configured in detail as follows. In room 1 of the building, the in-plane direction along the inner surface 2a of one partition body 2 and the in-plane direction along the inner surface 3a of the other partition body 3 intersect so as to form a corner protruding from the inside to the outside of room 1. Further, these in-plane directions can be substantially orthogonal so as to form a corner protruding from the inside to the outside of room 1.

[0024] However, the in-plane direction along the inner surface of one partition body and the in-plane direction along the inner surface of the other partition body can also be substantially parallel. Furthermore, the in-plane direction along the inner surface of one partition body and the in-plane direction along the inner surface of the other partition body can also be arranged along substantially the same plane.

[0025] Room 1 of the building has one support body 5 arranged so as to face the outer surface 2b on the side opposite to the inner surface 2a of one partition body 2. One support body 5 is arranged at a distance from the inner surface 2a of one partition body 2. Although not shown clearly in particular, one support body 5 supports one partition body 2. For example, when one partition body 2 is the ceiling as described above, one support body 5 can be a ceiling frame. When one partition body 2 is the first inner wall as described above, one support body 5 can be the first outer wall.

[0026] Room 1 of the building has the other support body 6 arranged so as to face the outer surface 3b on the side opposite to the inner surface 3a of the other partition body 3. The other support body 6 is arranged at a distance from the inner surface 3a of the other partition body 3. Although not shown clearly in particular, the other support body 6 supports the other partition body 3. For example, when the other partition body 3 is the first inner wall as described above, the other support body 6 can be the first outer wall. When the other partition body 3 is the second inner wall as described above, the other support body 6 can be the second outer wall.

[0027] In room 1 of the building, the width of the gap 4 can be in the range of about 10 mm or more and about 40 mm or less. Note that the width of the gap 4 is defined as the shortest distance between the one and the other partition bodies 2 and 3 in the gap 4. However, the width of the gap is not limited to such a range. The width of the gap can be made smaller than about 10 mm. The width of the gap can also be made larger than about 40 mm.

[0028] The sheet material body 11 can be made of rock wool felt. The material of the sheet material body 11 is adjusted so that the sheet material body 11 can be elastically deformed. In particular, the material of the sheet material body 11 is adjusted so that it is difficult to break under an external force such as bending and it is difficult to cause plastic deformation such as breakage. Such a sheet material body 11 includes a binder in addition to the main material, rock wool.

[0029] For example, the binder can contain phenol resin, acrylic resin, etc. as main components. For example, the binder can also contain saccharides, etc. The rock wool and the binder of such a sheet material body 11 are adjusted so that the sheet material body 11 can be elastically deformed. However, the sheet material body can also be configured not to have a binder. In this case, the sheet material body can be formed, for example, by needle punching.

[0030] In the sheet material body 11 of the sheet material 10, the density of the rock wool is about 80 kg / m 3 or more and about 130 kg / m 3 or less. However, the density of the rock wool is not limited to such a range. The density of the rock wool can be made less than about 80 kg / m 3 Also, the density of the rock wool can be made larger than about 130 kg / m 3 or more.

[0031] The sheet material cover 12 is integrated by being combined with the sheet material main body 11. The sheet material cover 12 is made of non-woven fabric. However, the sheet material cover can also be made of materials other than non-woven fabric. For example, the sheet material cover can also be made of woven fabric, plastic sheet, vinyl sheet, etc.

[0032] The thickness of the sheet material 10 can be in the range of about 15 mm or more and about 70 mm or less. Considering the ease of fixing the sheet material 10 by pinning or the like, preferably, the thickness of the sheet material 10 can be in the range of about 15 mm or more and about 45 mm or less. The thickness of the sheet material 10 can be about 20 mm, about 40 mm, or about 65 mm. However, the thickness of the sheet material is not limited to such a range. The thickness of the sheet material can also be less than about 15 mm. The thickness of the sheet material can also be greater than about 70 mm.

[0033] The mountain shape of the central portion 10a of the sheet material 10 is formed such that two slopes from the top to the bottom are curved from the outside to the inside of the mountain shape. Both edge portions 10b, 10c of the sheet material 10 are arranged at intervals from the gap 4 in the directions along the inner surfaces 2a, 3a of the one and the other partition bodies 2, 3, respectively. In other words, one edge portion 10b of the sheet material 10 is arranged at intervals from the gap 4 in the direction along the inner surface 2a of the one partition body 2, and the other edge portion 10c of the sheet material 10 is arranged at intervals from the gap 4 in the direction along the inner surface 3a of the other partition body 3.

[0034] When bending the central portion 10a of the sheet material 10, particularly when bending the central portion 10a of the sheet material 10 into a single mountain shape, considering the ease of fixing the one and the other edge portions 10b, 10c of the sheet material 10 to the inner surfaces 2a, 3a of the one and the other partition bodies 2, 3 respectively, the sum of the distance from the one edge portion 10b of the sheet material 10 to the gap 4, the width of the gap 4, and the distance from the other edge portion 10c of the sheet material 10 to the gap 4 (hereinafter referred to as "the total sum of the inner corner lengths of the sheet") can be made larger than about four times the thickness of the sheet material 10.

[0035] Here, considering the necessity for the sheet material 10 to have sufficient elasticity so as to be able to follow the variation of the gap 4 accompanying the sway of the building, the width of the central portion 10a of the sheet material 10 in the deployed state before installation is required to have a sufficient length so that the central portion 10a of the sheet material 10 can be bent in the installed state, particularly so that the central portion 10a of the sheet material 10 can be bent into the above-mentioned single mountain shape in the installed state.

[0036] On the other hand, considering reducing the material cost of the sheet material 10 and the fact that the fixing work of the sheet material 10 becomes complicated if it becomes too long, the width of the central portion 10a of the sheet material 10 in the deployed state before installation can also be made smaller than the total length of the inner corners of the sheet material. However, the width of the central portion of the sheet material in the deployed state before installation can also be made substantially equal to the total sum of the inner corner lengths of the sheet. The width of the central portion of the sheet material in the deployed state before installation can also be made larger than the total sum of the inner corner lengths of the sheet.

[0037] The one and the other edge portions 10b, 10c of the sheet material 10 can be fixed to the inner surfaces 2a, 3a of the one and the other partition bodies 2, 3 respectively by pinning. However, at least one of the both edge portions of the sheet material can also be fixed by means other than pinning. For example, at least one of the both edge portions of the sheet material can also be fixed so as to be pressed by other members.

[0038] "Outline of the Construction Method of the Gap Sound Insulation Structure" Referring to FIG. 1, the construction method of the gap sound insulation structure according to the present embodiment is generally as follows. The construction method of the gap sound insulation structure includes a sheet material installation step of installing the sheet material 10 along the longitudinal direction of the gap 4 inside the room 1. As described above, this sheet material 10 has a sheet material main body 11 configured with rock wool as the main material.

[0039] In this sheet material installation step, while arranging the central portion 10a in the width direction of the sheet material 10 in a movable state across the gap 4 with respect to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3, both edge portions 10b and 10c in the width direction of the sheet material 10 are fixed to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3, respectively.

[0040] Furthermore, the construction method of the gap sound insulation structure according to the present embodiment can generally be as follows. In the sheet material installation step, the central portion 10a in the width direction of the sheet material 10 is bent into one mountain shape protruding from the gap 4 toward the inside of the room 1. However, it is also possible to bend the central portion in the width direction of the sheet material into one mountain shape protruding from the inside of the room toward the gap. The central portion in the width direction of the sheet material can also be bent along the inner surfaces of the one and the other partition bodies.

[0041] The sheet material 10 has a sheet material cover 12 that covers the sheet material main body 11 from the inside of the room 1 as described above. The sheet material cover 12 is a member formed in a sheet shape.

[0042] "Details of the Construction Method of the Gap Sound Insulation Structure" Referring to FIG. 1, the construction method of the gap sound insulation structure according to the present embodiment can be specifically as follows. In the sheet material installation step, first, the central portion 10a in the width direction of the sheet material 10 is arranged in a movable state across the gap 4 with respect to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3 (central portion arrangement step). In particular, the central portion 10a in the width direction of the sheet material 10 is bent into one mountain shape protruding from the gap 4 toward the inside of the room 1.

[0043] Next, one edge portion 10b in the width direction of the sheet material 10 is fixed to the inner surface 2a of the one partition body 2 (one edge portion fixing step). The other edge portion 10c in the width direction of the sheet material 10 is fixed to the inner surface 3a of the other partition body 3 (the other edge portion fixing step).

[0044] However, in the sheet material installation step, it can also be carried out in the order of the central portion arrangement step, the other edge portion fixing step, and the one edge portion fixing step. In the sheet material installation step, it can also be carried out in the order of the one edge portion fixing step, the central portion arrangement step, and the other edge portion fixing step. In the sheet material installation step, it can also be carried out in the order of the other edge portion fixing step, the central portion arrangement step, and the one edge portion fixing step.

[0045] As described above, the gap sound insulation structure according to the present embodiment is a gap sound insulation structure configured to block the transmission of sound in a gap 4 formed between a one partition body 2 that is a ceiling or an inner wall of a room 1 in a building and another partition body 3 that is an inner wall of the room 1 adjacent to the one partition body 2. The gap sound insulation structure includes a sheet material 10 extending along the longitudinal direction of the gap 4 inside the room 1. The sheet material 10 has a sheet material main body 11 configured with rock wool as a main material. The central portion 10a in the width direction of the sheet material 10 is arranged so as to straddle the gap 4 in a movable state with respect to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3 facing the inside of the room 1. Both edge portions 10b and 10c in the width direction of the sheet material 10 are respectively fixed to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3. Further, the central portion 10a in the width direction of the sheet material 10 can be bent into one mountain shape protruding from the gap 4 toward the inside of the room 1.

[0046] According to such a gap sound insulation structure, even when a gap 4 having a sufficient width is formed to prevent contact between the one and the other partition bodies 2 and 3 for countermeasures against building sway, the sound leakage passing through this gap 4 can be efficiently prevented by the sheet material 10, particularly the sheet material main body 11 configured with rock wool as the main material. Since both edge portions 10b and 10c in the width direction of the sheet material 10 are respectively fixed to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3, even when the building sways greatly, it is possible to efficiently prevent the generation of rubbing noise between the sheet material 10 and the one or the other partition body 2 or 3.

[0047] Furthermore, the central portion 10a in the width direction of the sheet material 10 is arranged so as to straddle the gap 4 in a movable state with respect to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3. In particular, since the central portion 10a in the width direction of the sheet material 10 is bent into a mountain shape protruding from the gap 4 toward the inside of the room 1, even when the gap 4 fluctuates due to large sway of the building, the sheet material 10 can sufficiently follow the fluctuation of the gap 4. Therefore, the sheet material is not damaged or detached due to the sway of the building, and damage to the gap sound insulation structure due to the sway of the building can be prevented.

[0048] According to the above gap sound insulation structure, the work of installing the sheet material 10 can be performed only on the inner side of the room 1. Also, the work of fixing both edge portions 10b and 10c of the sheet material 10 to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3 while bending the central portion 10a of the sheet material 10 is simple and does not require skilled skills, high positioning accuracy, etc. Therefore, the gap sound insulation structure can be efficiently constructed. Thus, according to the gap sound insulation structure according to the present embodiment, while ensuring the gap 4 for countermeasures against building sway, noise such as sound leakage passing through this gap 4 can be efficiently prevented, damage to the gap sound insulation structure due to the sway of the building can be prevented, and the gap sound insulation structure can be efficiently constructed.

[0049] In the gap sound insulation structure according to the present embodiment, the seat material 10 has a seat material cover 12 that covers the seat material body 11 from the inner side of the room 1. According to such a gap sound insulation structure, in the operation of installing the seat material 10, the seat material cover 12 can prevent an operator from touching the seat material body 11 configured mainly with rock wool. Therefore, the operation of installing the seat material 10 can be made efficient, and as a result, the gap sound insulation structure can be efficiently constructed.

[0050] "Second Embodiment" The gap sound insulation structure according to the second embodiment will be described.

[0051] "Outline of Gap Sound Insulation Structure" Referring to FIG. 2, the gap sound insulation structure according to the present embodiment is generally configured as follows. The gap sound insulation structure according to the present embodiment is configured by adding an additional seat material 20 to the gap sound insulation structure according to the first embodiment.

[0052] That is, the gap sound insulation structure has an additional seat material 20 that extends along the longitudinal direction of the seat material 10 on the side opposite to the gap 4 with respect to the seat material 10. The additional seat material 20 has an additional seat material body 21 configured mainly with rock wool.

[0053] Furthermore, the central portion 20a in the width direction of the additional seat material 20 can be arranged following the central portion 10a in the width direction of the seat material 10. Both edge portions 20b, 20c in the width direction of the additional seat material 20 can be fixed to the inner surfaces 2a, 3a of the one and the other partition bodies 2, 3 in a state shifted from the both edge portions 10b, 10c in the width direction of the seat material 10, respectively.

[0054] In other words, one edge 20b in the width direction of the additional sheet material 20 can be fixed to the inner surface 2a of one partition body 2 in a state shifted with respect to one edge 10b in the width direction of the sheet material 10, and the other edge 20c in the width direction of the additional sheet material 20 can be fixed to the inner surface 3a of the other partition body 3 in a state shifted with respect to the other edge 10c in the width direction of the sheet material 10, respectively.

[0055] Furthermore, the additional sheet material 20 can have an additional sheet material cover 22 that covers the additional sheet material main body 21 from the inner side of the room 1. The additional sheet material cover 22 is a member formed in a sheet shape. However, the additional sheet material cover can also be configured to cover the entire additional sheet material main body.

[0056] "Details of the gap sound insulation structure" Referring to FIG. 2, the gap sound insulation structure according to the present embodiment can be configured in detail as follows. In the gap sound insulation structure, similar to the above-described sheet material main body 11, the additional sheet material main body 21 can be made of rock wool felt. The material of the additional sheet material main body 21 can be selected from among the materials used for the above-described sheet material main body 11. The material of the additional sheet material main body 21 can be the same as the material of the sheet material main body 11. However, the material of the additional sheet material main body can also be made different from the material of the sheet material main body.

[0057] The central portion 10a of the sheet material 10 and the central portion 20a of the additional sheet material 20 overlap each other in their thickness directions. When the central portion 10a of the sheet material 10 bends into the above-described one mountain shape, the central portion 20a of the additional sheet material 20 will be formed into one mountain shape following the central portion 10a of such a sheet material 10.

[0058] However, a space can also be formed between the central portion of the sheet material and the central portion of the additional sheet material. Even in this case, the central portion of the additional sheet material can be formed in a single mountain shape that protrudes from the gap toward the interior of the room. Furthermore, this mountain shape can be formed such that the two slopes from the top to the bottom are curved from the outside to the inside of the mountain shape.

[0059] One edge portion 20b of the additional sheet material 20 is adjacent to one edge portion 10b of the sheet material 10 in a direction along the inner surface 2a of the one partitioning body 2. The other edge portion 20c of the additional sheet material 20 is adjacent to the other edge portion 10c of the sheet material 10 in a direction along the inner surface 3a of the other partitioning body 3.

[0060] In the additional sheet material main body 21 of the additional sheet material 20, the density of the rock wool can be in the range of about 80 kg / m 3 or more and about 130 kg / m 3 or less. However, the density of the rock wool is not limited to such a range. The density of the rock wool can also be less than about 80 kg / m 3 . Also, the density of the rock wool can be greater than about 130 kg / m 3 . The density of the rock wool in the additional sheet material main body 21 can be the same as the density of the rock wool in the sheet material main body 11. However, the density of the rock wool in the additional sheet material main body can also be made different from the density of the rock wool in the sheet material main body.

[0061] The additional sheet material cover 22 is integrated by being combined with the additional sheet material main body 21. The additional sheet material cover 22 is formed in a sheet shape. The additional sheet material cover 22 is composed of a non-woven fabric. However, the additional sheet material cover can also be composed of a material other than a non-woven fabric. For example, the additional sheet material cover can also be composed of a woven fabric, a plastic sheet, etc.

[0062] The material of the additional sheet material cover 22 can be the same as that of the sheet material cover 12. However, the material of the additional sheet material cover can also be different from that of the sheet material cover.

[0063] The thickness of the additional sheet material 20 can be in the range of about 15 mm or more and about 70 mm or less. Considering the ease of fixing the additional sheet material 20 by means such as pinning, preferably, the thickness of the additional sheet material 20 can be in the range of about 15 mm or more and about 45 mm or less. The thickness of the additional sheet material 20 can be about 20 mm, about 40 mm, or about 65 mm. However, the thickness of the additional sheet material is not limited to such a range. The additional thickness can also be less than about 15 mm. The thickness of the additional sheet material can also be greater than about 70 mm. The thickness of the additional sheet material 20 can be the same as the thickness of the sheet material 10. However, the thickness of the additional sheet material can also be different from the thickness of the sheet material.

[0064] Both the one and the other edge portions 20b, 20c of the additional sheet material 20 can also be fixed to the inner surfaces 2a, 3a of the one and the other partition bodies 2, 3 respectively by pinning. However, at least one of both edge portions of the additional sheet material can also be fixed by means other than pinning. For example, at least one of both edge portions of the additional sheet material can also be fixed so as to be pressed by other members.

[0065] "Outline of the construction method of the gap sound insulation structure" Referring to FIG. 2, the construction method of the gap sound insulation structure according to the present embodiment is generally as follows. The construction method of the gap sound insulation structure according to the present embodiment is obtained by adding an additional sheet material installation step to the construction method of the gap sound insulation structure according to the first embodiment.

[0066] That is, the construction method of the gap sound insulation structure includes an additional sheet material installation step of installing an additional sheet material 20 extending along the longitudinal direction of the sheet material 10 on the side opposite to the gap 4 with respect to the sheet material 10 after the sheet material installation step. As described above, this additional sheet material 20 has an additional sheet material main body 21 configured with rock wool as the main material.

[0067] In the additional sheet material installation step, while arranging the central portion 20a in the width direction of the additional sheet material 20 along the central portion 10a in the width direction of the sheet material 10, both edge portions 20b and 20c in the width direction of the additional sheet material 20 are respectively shifted with respect to both edge portions 10b and 10c in the width direction of the sheet material 10 and fixed to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3, respectively. Further, this additional sheet material 20 can have an additional sheet material cover 22 that covers the additional sheet material main body 21 from the inner side of the room 1.

[0068] "Details of the construction method of the gap sound insulation structure" Referring to FIG. 2, the construction method of the gap sound insulation structure according to the present embodiment can be specifically as follows. In the additional sheet material installation step, first, the central portion 20a in the width direction of the additional sheet material 20 is arranged along the central portion 10a in the width direction of the sheet material 10 (central portion arrangement step).

[0069] Next, one edge portion 20b in the width direction of the additional sheet material 20 is fixed to the inner surface 2a of the one partition body 2 (one edge portion fixing step). The other edge portion 20c in the width direction of the additional sheet material 20 is fixed to the inner surface 3a of the other partition body 3 (the other edge portion fixing step).

[0070] However, in the additional sheet material installation step, the central portion arrangement step, the other edge portion fixing step, and the one edge portion fixing step can also be carried out in this order. In the additional sheet material installation step, the one edge portion fixing step, the central portion arrangement step, and the other edge portion fixing step can also be carried out in this order. In the additional sheet material installation step, the other edge portion fixing step, the central portion arrangement step, and the one edge portion fixing step can also be carried out in this order.

[0071] As described above, in the gap sound insulation structure and its manufacturing method according to the present embodiment, in addition to the effects obtained by the gap sound insulation structure and its manufacturing method according to the first embodiment, the following effects can be obtained. That is, the gap sound insulation structure according to the present embodiment further includes an additional sheet material 20 that extends along the longitudinal direction of the sheet material 10 on the side opposite to the gap 4 with respect to the sheet material 10, and the additional sheet material 20 has an additional sheet material main body 21 configured with rock wool as the main material.

[0072] According to such a gap sound insulation structure, in addition to the sheet material 10, the additional sheet material 20, particularly the additional sheet material main body 21 configured with rock wool as the main material, can efficiently prevent sound leakage through the above-mentioned gap.

[0073] In the gap sound insulation structure according to the present embodiment, the central portion 20a in the width direction of the additional sheet material 20 is arranged following the central portion 10a in the width direction of the sheet material 10, and both edge portions 20b, 20c in the width direction of the additional sheet material 20 are respectively fixed to the inner surfaces 2a, 3a of the one and the other partition bodies 2, 3 in a state shifted with respect to both edge portions 10b, 10c in the width direction of the sheet material 10.

[0074] According to such a gap sound insulation structure, the central portion 20a in the width direction of the additional sheet material 20 is also bent into a single mountain shape in the same manner as the central portion 10a in the width direction of the sheet material 10. Therefore, even when the gap fluctuates due to a large shake of the building, the sheet material 10 and the additional sheet material 20 can sufficiently follow the fluctuation of the gap. As a result, the sheet material 10 and the additional sheet material 20 are not damaged or detached due to the shake of the building, and damage to the gap sound insulation structure due to the shake of the building can be prevented.

[0075] Furthermore, according to the above-described gap sound insulation structure, the operation of installing the additional sheet material 20 can be performed only on the inner side of the room 1. Also, while deforming the central portion 20a of the additional sheet material 20 into a single mountain shape, the operation of fixing the both edge portions 20b and 20c of the additional sheet material 20 to the inner surfaces 2a and 3a of the one and the other partition bodies 2 and 3, respectively, in a state of being shifted with respect to the both edge portions 10b and 10c of the sheet material 10 is simple and does not require skilled skills, high positioning accuracy, etc. Therefore, the gap sound insulation structure can be efficiently constructed.

[0076] In the gap sound insulation structure according to the present embodiment, the additional sheet material 20 has an additional sheet material cover 22 that covers the additional sheet material main body 21 from the inner side of the room 1. According to such a gap sound insulation structure, in the operation of installing the additional sheet material 20, the additional sheet material cover 22 can prevent an operator from touching the additional sheet material main body 21 configured with rock wool as a main material. Therefore, the operation of installing the additional sheet material 20 can be made efficient, and as a result, the gap sound insulation structure can be efficiently constructed.

[0077] Although the embodiments of the present invention have been described so far, the present invention is not limited to the above-described embodiments, and the present invention can be modified and changed based on its technical idea.

Example

[0078] 「Example 1」 Example 1 will be described. The gap sound insulation structure of Example 1 was configured in the same manner as the gap sound insulation structure according to the first embodiment. In particular, in the gap sound insulation structure of Example 1, the central portion 10a in the width direction of the sheet material 10 was bent into a single mountain shape protruding from the gap 4 toward the inside of the room 1.

[0079] Regarding the gap sound insulation structure of Example 1, more specifically, each of the first and second partition bodies 2 and 3 was configured by laminating four gypsum boards. The thickness of each gypsum board was 21 mm. It was arranged so that the in-plane direction along the inner surface 2a of the first partition body 2 was substantially orthogonal to the in-plane direction along the inner surface 3a of the second partition body 3. The width of the gap 4 was 15 mm. The thickness of the sheet material 10 was 40 mm. In Example 1, the acoustic transmission loss T (dB) of such a gap sound insulation structure was measured.

[0080] Regarding the measurement method of the acoustic transmission loss T of Example 1, specifically, anechoic chamber and reverberation chamber were installed adjacent to each other, an opening connecting the internal space of the reverberation chamber and the internal space of the anechoic chamber was formed, and the gap sound insulation structure of Example 1 was installed so as to close this opening. Next, regarding the incident side, with the sound being generated from the speaker in the reverberation chamber, the average sound pressure level L (dB) in the reverberation chamber was measured as the incident power on the sound source side incident on the sample.

[0081] Regarding the receiving side, an acoustic intensity probe was installed near the gap sound insulation structure in the anechoic chamber. Using this acoustic intensity probe, a measurement surface corresponding to the gap sound insulation structure and divided was measured, and thereby, the transmitted power P (dB) passing through the gap sound insulation structure was estimated. Based on such average sound pressure level L (dB) and transmitted power P (dB), the acoustic transmission loss T (dB) was calculated.

[0082] "Example 2" Example 2 will be described. The gap sound insulation structure of Example 2, similar to the gap sound insulation structure according to the second embodiment, added an additional sheet material 20 to the gap sound insulation structure of Example 1 corresponding to the first embodiment. The thickness of this additional sheet material 20 was 40 mm. In Example 2, the acoustic transmission loss T (dB) of such a gap sound insulation structure was measured in the same manner as in Example 1.

[0083] "Comparative Example" A comparative example will be described. In the gap sound insulation structure of the comparative example, the sheet material 10 was removed from the gap sound insulation structure of Example 1, and an L-shaped angle was attached to the first partition body 2 along the edge of the gap 4 while leaving the gap 4. In the comparative example, the acoustic transmission loss T (dB) of such a gap sound insulation structure was measured in the same manner as in Example 1.

[0084] In such gap sound insulation structures of Example 1 and 2 and the comparative example, measurement results of the acoustic transmission loss T as shown in FIG. 3 were obtained. In FIG. 3, the horizontal axis F represents the frequency (Hz). The vertical axis T represents the acoustic transmission loss T (dB). The solid line N1 represents the measurement result of Example 1. The dashed-dotted line N2 represents the measurement result of Example 2. The broken line N3 represents the measurement result of the comparative example.

[0085] Referring to FIG. 3 and comparing these, the acoustic transmission loss T of Example 1 became larger than that of the comparative example in the region of 160 Hz or more. In particular, the difference in the acoustic transmission loss T of Example 1 with respect to the acoustic transmission loss T of the comparative example increased as the frequency increased at 800 Hz or more. The acoustic transmission loss T of Example 2 became larger than the acoustic transmission loss T of Example 1. In particular, the difference in the acoustic transmission loss T of Example 2 with respect to the acoustic transmission loss T of Example 1 was larger in the region of 500 Hz or more than in the region of less than 500 Hz.

[0086] And in Example 1, even when the gap 4 fluctuated, the sheet material 10 could follow the fluctuation of the gap 4, and the gap sound insulation structure did not break. Also in Example 2, even when the gap 4 fluctuated, the sheet material 10 and the additional sheet material 20 could follow the fluctuation of the gap 4, and the gap sound insulation structure did not break.

[0087] Therefore, according to the gap sound insulation structure of Example 1, it was confirmed that breakage of the gap sound insulation structure could be prevented and a sufficient sound insulation effect against the gap 4 could be obtained. Also, according to the gap sound insulation structure of Example 2, it was confirmed that breakage of the gap sound insulation structure could be prevented and a sound insulation structure against the gap could be obtained more efficiently than the gap sound insulation structure of Example 1.

Description of Reference Numerals

[0088] 1…Room of the building, 2…One partition body, 2a…Inner surface, 3…The other partition body, 3a…Inner surface, 4…Gap 10…Sheet material, 10a…Central part, 10b…Edge, one edge, 10c…Edge, the other edge, 11…Sheet material body, 12…Sheet material cover 20…Additional sheet material, 20b…Edge, one edge, 20c…Edge, the other edge, 21…Additional sheet material body, 22…Additional sheet material cover

Claims

1. A gap sound insulation structure configured to block sound transmission in a gap formed between one partition body that is the ceiling or inner wall of a room in a building and the other partition body that is the inner wall of the room adjacent to the one partition body, comprising a sheet material extending along the longitudinal direction of the gap inside the room, wherein the in-plane direction along the inner surface of the one partition body and the in-plane direction along the inner surface of the other partition body intersect to form a corner protruding from the inside of the room toward the outside of the room, the width of the gap, which is the shortest distance between the one and the other partition bodies, is in the range of 10 mm or more and 40 mm or less, the sheet material has a sheet material main body configured with rock wool as the main material, the thickness of the sheet material is in the range of 15 mm or more and 70 mm or less, the central portion in the width direction of the sheet material is arranged to straddle the gap in a movable state with respect to the inner surfaces of the one and the other partition bodies facing the inside of the room, and is bent in a single mountain shape protruding from the gap toward the inside of the room at the inner surfaces of the one and the other partition bodies, the mountain shape of the central portion of the sheet material is formed such that two slopes from the top to the bottom of the mountain shape are curved from the outside to the inside of the mountain shape, one edge portion in the width direction of the sheet material is arranged at a distance from the gap in the in-plane direction along the inner surface of the one partition body and is fixed to the inner surface of the one partition body, and further, the other edge portion in the width direction of the sheet material is arranged at a distance from the gap in the in-plane direction along the inner surface of the other partition body and is fixed to the inner surface of the other partition body. A gap sound insulation structure.

2. The sheet material has a sheet material cover that covers the sheet material main body from the inside of the room side, and the sheet material cover is a member formed in a sheet shape. The gap sound insulation structure according to claim 1.

3. further comprising an additional sheet material extending along the longitudinal direction of the sheet material on the side opposite to the gap with respect to the sheet material, wherein the additional sheet material has an additional sheet material main body configured with rock wool as the main material. The gap sound insulation structure according to claim 1 or 2.

4. the central portion in the width direction of the additional sheet material is arranged following the central portion in the width direction of the sheet material. The gap sound insulation structure according to claim 3, wherein both edge portions in the width direction of the additional sheet material are respectively fixed to the inner surfaces of the one and the other partition bodies in a state of being shifted with respect to both edge portions in the width direction of the sheet material.

5. The additional sheet material has an additional sheet material cover that covers the additional sheet material main body from the inner side of the room, The gap sound insulation structure according to claim 3 or 4, wherein the additional sheet material cover is a member formed in a sheet shape.

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