JP2015017392A - Soundproof structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soundproof structure of a building capable of reducing floor impact sounds made on a double-floor with simple means.SOLUTION: A soundproof structure of a building which has a double-floor 20, a double wall 30 and a double ceiling 40 includes: first communication means 27 that communicates an internal space 25 of the double-floor and an internal space 35 of the double wall; second communication means 37 that communicates the internal space 35 of the double wall and an internal space 45 of the double ceiling; and third communication means 38 and 39 that communicate the internal space of the double wall and/or the internal space of the double ceiling and an indoor space R. An air pressure change made in the internal space caused by an impact onto the double-floor is transmitted to the air in the internal space of the double wall via the first communication means; and via second communication means, the pressure change is transmitted to the air in the internal space of the double ceiling is changed; and further via the third communication means, the pressure change is transmitted to the air in the indoor space. Thus, the air pressure change is reduced.

Description

  The present invention relates to a soundproof structure for installing a double floor in a building.

  Conventionally, when a double floor is installed in a building for soundproofing and sound insulation, when the floor is impacted by jumping, etc., the spring effect (so-called taiko phenomenon) due to the air layer sealed inside it is It is known that the barrier property of floor impact sound is deteriorated as compared with the case where there is no heavy floor. In order to solve this problem, a method has been proposed in which a gap is provided in the lower part of the baseboard, which is a finishing element of the wall, for the purpose of communicating the air in the double floor with the air in the room (Patent Document 1, 2). Further, as a method for making the gap at the bottom of the baseboard inconspicuous, a method of arranging short fibers has been proposed (see Patent Document 2).

Japanese Patent Laid-Open No. 2002-81198 JP 2012-197601

  However, if a gap is provided in the lower part of the baseboard, there is a problem that dust is easily collected when cleaning the double floor, and the impression that the baseboard is not yet firmly constructed is given. There is a demand for mitigating floor impact noise by simple means in a double floor without avoiding such a problem and providing a gap below the baseboard.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a soundproof structure for a building that can mitigate floor impact noise on a double floor with simple means.

  In order to achieve the above object, a soundproof structure for a building according to the present embodiment is a soundproof structure for a building having a double floor, a double wall, and a double ceiling, wherein the double floor has an internal space and the double soundproof structure. A first communicating means for communicating with the internal space of the wall, a second communicating means for communicating the internal space of the double wall and the internal space of the double ceiling, the internal space of the double wall, and / or Or a third communication means for communicating the internal space of the double ceiling and the indoor space, and the first communication means against air pressure fluctuations in the internal space caused by an impact on the double floor. The air in the internal space of the double wall is interlocked, the air in the internal space of the double ceiling is interlocked by the second communication means, and the air in the indoor space is interlocked by the third communication means. The air pressure fluctuation is alleviated.

  According to the soundproof structure of the building, the first and second communication means allow the space between the internal space of the double floor and the internal space of the double wall and the internal space of the double wall and the internal space of the double ceiling. When the air pressure in the internal space changes due to the impact on the double floor, the air is communicated between them, and further, the third communication means communicates with the indoor space. Air pressure fluctuations are mitigated by interlocking the air with the interior space and the indoor air. The first and second communication means may be, for example, pipes, ducts, holes, and the like, and the third communication means may be simple means, such as holes and slits. Thus, the impact sound to the double floor can be mitigated by simple means.

  In the soundproof structure of the building, the third communication means has a ceiling opening partially provided on a ceiling surface, and a translucent material is disposed so as to cover the ceiling opening, and the translucent material It can be configured such that a gap is formed between the ceiling surface. By covering the ceiling opening with a light-transmitting material, the ceiling opening can be made invisible from the room side, and by forming a gap between the light-transmitting material and the ceiling surface, it is possible to communicate with the indoor space. In this case, the third communication means can also serve as the illumination means by arranging the illumination tool in the ceiling opening.

  The soundproof structure of another building according to the present embodiment is a soundproof structure of a building having a double floor, a double wall, and a double ceiling, and includes an internal space of the double floor and an internal space of the double wall. First communication means that communicates, second communication means that communicates the internal space of the double wall and the internal space of the double ceiling, and the double ceiling provided at least in part of the double ceiling An easily deformable means that easily deforms due to air pressure fluctuations in the internal space of the interior of the double wall by the first communication means against air pressure fluctuations in the internal space caused by impact on the double floor. The air in the space is interlocked, the air in the internal space of the double ceiling is interlocked by the second communication means, and the easily deformable means is deformed in the double ceiling, thereby reducing the air pressure fluctuation. It is characterized by.

  According to the soundproof structure of the building, the first and second communication means allow the space between the internal space of the double floor and the internal space of the double wall and the internal space of the double wall and the internal space of the double ceiling. By connecting air between them and providing easy deforming means on at least part of the double ceiling, when the air pressure in the internal space changes due to the impact on the double floor, the double wall internal space and the double ceiling Air fluctuations are mitigated by the interlocking of the air with the interior space and the easy deformation of the double ceiling. The first and second communicating means may be, for example, a pipe or a duct, and the easily deformable means may be, for example, a membrane member. Thus, the impact sound to the double floor can be mitigated by simple means.

  In the soundproof structure of another building, it is preferable that the easily deforming means has a film-like member, and the film-like member is partially disposed on the surface of the double ceiling. In this case, the film-like member is made of a translucent material, and the easily deforming means can also be used as the illumination means by providing a lighting device on the double ceiling portion where the film-like member is arranged.

  The easily deformable means may have a ceiling base material having a small rigidity and a flexible finishing material so that the entire ceiling surface is deformed.

  According to the soundproof structure for a building of the present invention, floor impact sound in a double floor can be reduced by simple means.

It is sectional drawing which shows the principal part cross section of the building by 1st Embodiment. FIG. 2 is a perspective view schematically showing a fitting type slit assembly for constituting the slit of FIG. 1. 2A is a sectional view showing a state where the slit assembly of FIG. 2 is fitted to the inner wall, FIG. 3B is a view seen from the direction BB in FIG. 3A, and FIG. 3A is a view taken from the direction CC in FIG. It is a figure (c). FIG. 1B is a cross-sectional view of an essential part showing an example in which an opening is provided in a part of the ceiling surface of the double ceiling of FIG. 1 and a lighting device and a translucent film-like member are arranged; ). It is sectional drawing which shows the principal part cross section of the building by 2nd Embodiment. It is a figure which shows the principal part of the ceiling surface of FIG. It is sectional drawing similar to FIG. 5 which shows the principal part cross section of the building by the modification of 2nd Embodiment. It is sectional drawing seen by cut | disconnecting in the VIII-VIII line direction of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a cross-sectional view showing a cross section of a main part of a building according to the first embodiment. As shown in FIG. 1, a building 10 according to the present embodiment is a high-rise apartment house having a column beam structure including columns (not shown) and beams B, and a large number of rooms are constructed. The soundproof structure has a floor 20, a double wall 30, and a double ceiling 40. This soundproof structure is designed to mitigate the impact sound on the double floor as follows.

  The double floor 20 is constructed on the frame slab S, and includes a floor slab 21 and a vibration isolation mat 22 disposed between the frame slab S and the floor slab 21. It has a number of piece-shaped vibration-proof rubbers 23 that are fitted into a protruding part that protrudes partially below. An internal space 25 is formed between the housing slab S and the vibration isolation mat 22.

  The double wall 30 has an outer wall side inner wall 31 and a wall base material 34 on the outer wall W1 side, and an inner space 35 is formed between the outer wall side inner wall 31 and the outer wall W1. On the outer wall W1 side of the internal space 35, a heat insulating layer 36 is provided by spraying. The double wall 30 is also provided on the side of the doorway wall W2, has a doorway wall side inner wall 32 and a wall base material 34, and has an internal space 35 between the doorway wall side inner wall 32 and the doorway wall W2. Is formed.

  The double ceiling 40 includes a ceiling surface 41 and a ceiling base material 44, and an internal space 45 is formed between the ceiling surface 41 and the upper frame slab S.

  A plurality of communication pipes 27 are arranged in the vertical direction between the end of the double floor 20 and the lower end of the double wall 30, and the lower ends of the communication pipes 27 open into the internal space 25 of the double floor 20, The upper end of the communication pipe 27 opens into the internal space 35 of the double wall 30. The internal space 25 of the double floor 20 and the internal space 35 of the double wall 30 are communicated by the communication pipe 27.

  At the upper end of the double wall 30 on the outer wall W <b> 1 side, a communication portion 37 that connects the internal space 35 of the double wall 30 and the internal space 45 of the double ceiling 40 is provided. The inner wall 31 has an upper end inner wall 31a, and the communication portion 37 is defined as a duct-shaped communication path by the upper end inner wall 31a.

  A slit 38 is provided at the upper end of the inner wall 31 on the outer wall W1 side of the double wall 30 and at the lower end of the communication portion 37 so as to open downward with respect to the room space R. The internal space 35 of the double wall 30 and the room space R communicate with each other through the slit 38.

  In addition, a space 33 following the internal space 35 is formed inside the upper end of the inner wall 32 on the door wall W <b> 2 side of the double wall 30, and a slit 39 is provided in the inner wall 32 corresponding to the space 33. The internal space 35 of the double wall 30 and the room space R communicate with each other through the slit 39 and the space 33. The inner walls 31, 32, 31a have a PB finish.

  According to the soundproof structure of the building in FIG. 1, the internal space 25 of the double floor 20 and the internal space 35 of the double wall 30 are communicated by the communication pipe 27, and the interior of the double wall 30 by the duct-shaped communication portion 37. The space 35 and the internal space 45 of the double ceiling 40 are communicated, and further, the internal space 35 of the double wall 30 and the room space R are communicated by slits 38 and 39 provided at the upper part of the double wall 30. When the air pressure fluctuation in the internal space 25 occurs due to the impact on the double floor 20, the air in the internal space 35 of the double wall 30 and the internal space 45 of the double ceiling 40 are linked, and the indoor air By interlocking, fluctuations in air pressure can be mitigated. In this way, changes in air pressure in the room space R and the internal space 25 of the double floor 20 that occur during a floor impact can be suppressed as much as possible. For this reason, even if there is an impact on the double floor, the impact sound can be mitigated, and generation of a large impact sound due to the so-called taiko phenomenon can be prevented.

  Further, it is only necessary to provide a pipe as the first communication means, a duct-shaped communication path as the second communication means, and a slit as the third communication means. Can be relaxed.

  In addition, the baseboard can be installed in close contact with the double floor surface, and there is no need to provide a gap at the bottom of the baseboard as in the conventional case. The problem of giving an impression is solved, and the arrangement of short fibers or the like is not necessary in order to make the gap between the baseboards inconspicuous.

  Next, the structure of the slit (third communication means) in FIG. 1 will be described with reference to FIGS. FIG. 2 is a perspective view schematically showing a fitting-type slit assembly constituting the slit of FIG. 3 is a cross-sectional view (a) showing a state in which the slit assembly of FIG. 2 is fitted to the inner wall, FIG. 3 (b) viewed from the direction BB in FIG. 3 (a), and FIG. It is the figure (c) seen from direction CC.

  As shown in FIG. 2, the slit assembly 50 is arranged with a first plate member 52 in which a rectangular opening 54 is formed, and the first plate member 52 so as to straddle the opening 54 and spaced apart from each other. The plurality of plate-like slit members 51 and a pair of second plate members 53 disposed on both end sides so as to sandwich the slit member 51 with respect to the first plate member 52. The slit assembly 50 has an integral structure in which the members 51 to 53 are made of a plastic material, wood, or the like and are assembled by being joined by an adhesive or a screw. The distance L1 between the first plate member 52 and the second plate member 53 is slightly larger than the thickness L2 of the inner wall 32 in FIG.

  The slit assembly 50 of FIG. 2 is installed so as to be fitted into the rectangular opening 32a of the inner wall 32 as shown in FIGS. 3A to 3C, and constitutes the slit 39 of FIG. That is, the slit assembly 50 is inserted into the opening 32a obliquely from the surface side of the inner wall 32 and then rotated, so that the space between the first plate member 52 and the second plate member 53 becomes the inner wall 32. Get stuck. In this way, the slit assembly 50 can be easily attached to the inner wall 32, the slit member 51 and the opening 54 constitute the slit 39, and the internal space 35 of the double wall 30 communicates with the space R of the room. can do.

  Note that the slit 38 in FIG. 1 can also be formed of a slit assembly as in FIG.

  In FIG. 1, an opening may be provided in a part of the ceiling surface 41 of the double ceiling 40, and a slit assembly similar to that in FIG. 2 may be disposed in this opening. 45 and the room space R can be communicated with each other.

  FIG. 4 is a cross-sectional view of a main part (a) showing an example in which an opening is provided in a part of the ceiling surface of the double ceiling 40 in FIG. 1 and a lighting device and a translucent film-like member are arranged, and the ceiling surface thereof. FIG.

  As shown in FIGS. 4A and 4B, a rectangular opening 55 is provided in a part of the ceiling surface 41 of the double ceiling 40 of FIG. 1, and an illuminator 57 such as a fluorescent lamp is provided at the position of the opening 55. The light-transmitting rectangular film member 56 is attached so as to cover the opening 55. At this time, the membrane member 56 is in close contact with the ceiling surface 41 at the two opposite sides 56a and 56b and is fixed by an adhesive, a screw, or the like, but between the other two sides 56c and 56d, It is attached so that there is a gap in it. A frame member 58 is fitted into the end of the opening 55.

  4 (a) and 4 (b), the internal space 45 of the double ceiling 40 and the room space R pass through the opening 55 and through the gap between the membrane member 56 and the ceiling surface 41. It is possible to communicate in the direction C of b). Further, the opening 55 of the ceiling surface 41 is covered with the membrane member 56 so that it cannot be seen from the room. Note that a plurality of openings 55 may be provided in the ceiling surface 41 to have the same configuration as described above. Further, as the translucent film member 56, for example, a translucent plastic material such as PMMA or PC can be used. However, the present invention is not limited to this, and for example, Japanese paper or the like may be used. Good.

<Second Embodiment>
FIG. 5 is a cross-sectional view showing a cross section of a main part of a building according to the second embodiment. FIG. 6 is a view showing a main part of the ceiling surface of FIG. In FIG. 5, illustration of the beam in FIG. 1 is omitted for convenience of explanation.

  The building 60 in FIG. 5 is a high-rise apartment house with a column beam structure, and a large number of rooms are constructed. Each room has a double floor 20, a double wall 30, a double ceiling 40 as in FIG. It has a soundproof structure. Hereinafter, the same reference numerals are given to the same parts as in FIG.

  The double floor 20 has a plurality of support legs 61 composed of vibration-proof rubber 61 a, support bolts 61 b, and a square receiving material 61 c arranged on the housing slab S at a constant pitch. The base plate 62, the vibration damping sheet 63, and the floor finishing material 64 are installed, and the internal space 25 is formed between the housing slab S and the base material 62.

  By providing a hole 65 in the inner walls 31, 32 at the lower end of the double wall 30, the internal space 25 of the double floor 20 and the internal space 35 of the double wall 30 communicate with each other. Further, by providing a hole 49 in the inner walls 31, 32 at the upper end portion of the double wall 30, the internal space 35 of the double wall 30 and the internal space 45 of the double ceiling 40 communicate with each other.

  An opening 72 formed in a part of the ceiling surface 41 of the double ceiling 40 is provided with an easily deformable portion 70 that is easily deformed by air pressure fluctuation in the internal space 45 of the double ceiling 40.

  As shown in FIGS. 5 and 6, the easily deformable portion 70 has a rectangular light-transmitting property attached so as to cover a rectangular opening 72 provided in a part of the ceiling surface 41 of the double ceiling 40. An elastic rubber sheet 71 is used. A lighting fixture 73 such as a fluorescent lamp is attached to the position of the opening 55 and is covered with a stretchable rubber sheet 71. The entire circumference of the elastic rubber sheet 71 is in close contact with the ceiling surface 41 and is fixed with an adhesive, screws, or the like. A frame member 74 is fitted into the end of the opening 72.

  According to the soundproof structure of the building of FIG. 5, the internal space 25 of the double floor 20 and the internal space 35 of the double wall 30 are communicated by the hole 65, and the internal space 35 of the double wall 30 and the double ceiling 40 are connected. When the internal space 45 is communicated with the hole 49, the easily deformable portion 70 is provided in a part of the ceiling surface 41 of the double ceiling 40, and the air pressure fluctuation of the internal space 25 occurs due to the impact on the double floor 20, two The air in the internal space 35 of the heavy wall 30 and the internal space 45 of the double ceiling 40 are interlocked, and the elastic rubber sheet 71 of the easily deformable portion 70 of the double ceiling 40 is easily deformed. Can be relaxed. In this way, changes in air pressure in the room space R and the internal space 25 of the double floor 20 that occur during a floor impact can be suppressed as much as possible. For this reason, even if there is an impact on the double floor, the impact sound can be mitigated, and generation of a large impact sound due to the so-called taiko phenomenon can be prevented.

  Further, the holes 65 and 49 are provided as the first and second communication means in the lower and upper end portions of the inner walls 31 and 32, and the elastic rubber sheet 71 is simply provided in the opening 72 as the easily deformable means. In addition, the impact sound on the double floor can be reduced at low cost. Moreover, since the elastic rubber sheet 71 is translucent, it can also be used as an illuminating means, and the room can be illuminated by the illuminating device 73 provided in the double ceiling 40. Moreover, the opening 72 of the ceiling surface 41 is covered with the elastic rubber sheet 71 so that it cannot be seen from the room. Note that a plurality of openings 72 may be provided on the ceiling surface 41 to have the same configuration as described above. The elastic rubber sheet 71 may be a silicon rubber sheet, for example, but is not limited thereto.

  Next, another easy deformation means in the double ceiling of FIG. 5 will be described with reference to FIGS. FIG. 7 is a cross-sectional view similar to FIG. 5 showing a cross-section of the main part of a building according to a modification of the second embodiment. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG.

  In the example of FIG. 7, the entire ceiling surface of the double ceiling is easily deformed. That is, as shown in FIGS. 7 and 8, the double ceiling 40 includes a ceiling surface 81 made of a highly flexible plaster board for curved surfaces, and a plurality of base materials 82 with low rigidity that are joined to the ceiling surface 81 and support the ceiling surface. And a receiving member 83 that is disposed at an end of the double ceiling 40 and supports the base material 82 at both ends. An internal space 45 is formed between the ceiling surface 81 and the upper frame slab S.

  According to the soundproof structure of the building of FIG. 7, when the air pressure fluctuation of the internal space 25 occurs due to the impact on the double floor 20 as in FIG. 5, the internal space 35 of the double wall 30 and the interior of the double ceiling 40 The air with the space 45 is interlocked, and the entire ceiling surface 81 of the double ceiling 40 is easily deformed together with the base material 82, and its central portion is warped or swelled in the vertical direction, thereby reducing air pressure fluctuations. can do. In this way, changes in air pressure in the room space R and the internal space 25 of the double floor 20 that occur during a floor impact can be suppressed as much as possible. For this reason, even if there is an impact on the double floor, the impact sound can be mitigated, and generation of a large impact sound due to the so-called taiko phenomenon can be prevented.

  As described above, the modes for carrying out the present invention have been described. However, the present invention is not limited to these, and various modifications can be made within the scope of the technical idea of the present invention. For example, a building to which the soundproof structure of the present invention can be applied is not limited to a housing complex, and may be other buildings, such as office buildings, hotels, schools, hospitals, etc. Is preferred.

  According to the present invention, floor impact sound in a double floor can be mitigated by simple means, which is advantageous in terms of cost, and in particular, neighboring complaints caused by living sounds on upper and lower floors that can be said to be unsolved in an apartment house It is possible to provide a soundproof structure that can contribute to the reduction of noise.

DESCRIPTION OF SYMBOLS 10 Building 20 Double floor 25 Internal space 27 Communication pipe 30 Double wall 31 Outer wall side inner wall 32 Door wall inner wall 35 Internal space 37 Communication part 38, 39 Slit 40 Double ceiling 41 Ceiling surface 45 Internal space 50 Slit assembly 55 Opening 56 Membrane member 60 Building 61 Support leg 65, 49 Hole 70 Deformable part 71 Elastic rubber sheet 72 Opening 73 Illumination tool 81 Ceiling surface 82 Base material R Room space, indoor space

Claims (7)

A soundproof structure of a building having a double floor, a double wall and a double ceiling,
First communication means for communicating the internal space of the double floor and the internal space of the double wall;
A second communication means for communicating the internal space of the double wall and the internal space of the double ceiling;
A third communication means for communicating the internal space of the double wall and / or the internal space of the double ceiling and the indoor space;
The air in the internal space of the double wall is interlocked by the first communication means with respect to the air pressure fluctuation in the internal space due to the impact on the double floor, and the double ceiling is The building soundproofing structure is characterized in that air pressure in the interior space is interlocked and the air in the indoor space is interlocked by the third communication means to reduce the air pressure fluctuation. The third communication means has a ceiling opening partially provided on the ceiling surface,
The soundproof structure for a building according to claim 1, wherein a translucent material is disposed so as to cover the ceiling opening, and a gap is formed between the translucent material and the ceiling surface.   The soundproof structure for a building according to claim 2, wherein a lighting fixture is disposed in the ceiling opening. A soundproof structure of a building having a double floor, a double wall and a double ceiling,
First communication means for communicating the internal space of the double floor and the internal space of the double wall;
A second communication means for communicating the internal space of the double wall and the internal space of the double ceiling;
An easily deformable means provided on at least a part of the double ceiling and easily deformed by air pressure fluctuation in the internal space of the double ceiling,
The air in the internal space of the double wall is interlocked by the first communication means with respect to the air pressure fluctuation in the internal space due to the impact on the double floor, and the double ceiling is A soundproofing structure for a building, in which air in an internal space is interlocked and the easily deformable means is deformed in the double ceiling to alleviate the air pressure fluctuation.   The soundproof structure for a building according to claim 4, wherein the easily deformable means includes a film-like member, and the film-like member is partially disposed on a surface of the double ceiling. The film-like member is made of a translucent material,
The soundproof structure for a building according to claim 5, wherein a lighting fixture is provided on the double ceiling portion on which the membrane member is disposed.   The soundproof structure for a building according to claim 4, wherein the easily deformable means includes a ceiling base material having a small rigidity and a flexible finishing material, and the entire ceiling surface is deformed.

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