Floor impact noise reduction structure and ventilation pipe

Abstract

To provide a floor impact noise reduction structure and a ventilation pipe that are optimal for reducing the propagation of impact noise from an upper floor to a lower floor.SOLUTION: The present invention is a floor impact noise reduction structure for reducing propagation of impact noise from an upper floor to a lower floor in a building (100), including: an inter-floor space (S1, S2) between the floor of the upper floor and the ceiling of the lower floor; a partition wall (3) extending from the upper floor to the lower floor, dividing the upper floor into left and right rooms and the lower floor into left and right rooms, and dividing the inter-floor space into left and right inter-floor spaces; and a vent pipe (6) penetrating the partition wall from left to right in the inter-floor space and connecting the left and right inter-floor spaces. The vent pipe includes a sound-absorbing pipe (66) branching off from the vent pipe, and a sound-absorbing material (66a) is provided at the closed end of the sound-absorbing pipe.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a structure for reducing floor impact noise and a ventilation pipe. [Background technology]

[0002] Generally, in a floor structure consisting of an upper floor and a lower ceiling, when floor impact noise is applied, the air trapped in the space between the floor and ceiling (hereinafter referred to as the inter-floor space) has no place to escape, so the floor and ceiling behave as one. As a result, the floor impact noise applied to the floor is radiated from the ceiling with almost no attenuation.

[0003] As a structure for reducing such floor impact noise, Patent No. 3909938 (Patent Document 1) discloses a technology that connects the space between floors with the internal space of the wall, thereby ensuring air movement toward the wall when floor impact noise is applied, thereby reducing the pressure change in the space between floors and mitigating the propagation of floor impact noise to the floor below (the drumming phenomenon). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3909938 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to ensure sound insulation between adjacent rooms, if a so-called wall-dominated structure is used, in which a partition wall or other partitioning wall precedes the floor and ceiling, the inter-floor space between adjacent rooms on the left and right is separated by a wall that extends across the upper and lower floors. In this case, the space within the wall does not communicate with the inter-floor space, so the technology in Patent Document 1 cannot be applied.

[0006] Therefore, even in a wall-dominated structure, technology is needed that can reduce the propagation of impact sounds from upper floors to lower floors.

[0007] The present invention has been made to solve these problems, and its purpose is to provide a floor impact noise reduction structure and ventilation pipe that are optimal for reducing the propagation of impact noise from the floor on the upper floor to the floor below. [Means for solving the problem]

[0008] A floor impact sound reduction structure according to one aspect of the present invention is a floor impact sound reduction structure in a building that reduces the propagation of impact sounds from an upper floor to a lower floor, and comprises an inter-floor space between the floor of the upper floor and the ceiling of the lower floor, a partition wall extending from the upper floor to the lower floor, dividing the upper floor into left and right rooms and the lower floor into left and right rooms, and dividing the inter-floor space left and right, and an air vent pipe that penetrates the partition wall from left to right in the inter-floor space and connects the left and right inter-floor spaces, the air vent pipe including a sound absorbing pipe branching off from the air vent pipe, and sound absorbing material is provided at the closed end of the sound absorbing pipe.

[0009] Preferably, the partition is densely filled with sound absorbing material.

[0010] Preferably, the length of the sound absorbing tube is 1.90 m to 3.82 m.

[0011] Preferably, a plurality of sound absorbing tubes are provided.

[0012] Preferably, the sound absorbing tubes are of the same length.

[0013] Preferably, the sound absorbing tubes are of different lengths.

[0014] A ventilation pipe according to another aspect of the present invention is arranged to penetrate a partition wall that separates the space between the floor of an upper floor and the ceiling of a lower floor of a building into left and right sections, and reduces the propagation of impact noise from the upper floor to the lower floor, and includes a sound-absorbing pipe branching off from the side, with sound-absorbing material provided at the closed end of the sound-absorbing pipe. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a floor impact noise reduction structure and ventilation pipe that are optimal for reducing the propagation of impact noise from an upper floor to a lower floor. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a cross-sectional view schematically showing a structure for reducing floor impact noise. [Figure 2] FIG. 2 is a partial perspective view showing an example of a sound absorbing tube. DETAILED DESCRIPTION OF THE INVENTION

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals and description thereof will not be repeated.

[0018] <Embodiment> (Outline of floor impact noise reduction structure) A structure for reducing floor impact noise according to an embodiment of the present invention will be described with reference to Fig. 1. This structure is a structure for reducing floor impact noise that reduces the propagation of impact noise from an upper floor to a lower floor in a building 100. In Fig. 1, the left-right direction of the building 100 is indicated by an arrow X, and the up-down direction is indicated by an arrow Y.

[0019] FIG. 1 shows a part of an upper floor first room 41, an upper floor second room 42, a lower floor first room 43, and a lower floor second room 44, which are adjacent to each other vertically and horizontally in a building 100.

[0020] The floor 11 of the first room 41 on the upper floor and the ceiling 21 of the first room 43 on the lower floor are spaced apart vertically, and a first inter-floor space S1 is formed between the floor 11 and the ceiling 21. The first room 41 on the upper floor is adjacent to the first room 43 on the lower floor vertically, via the floor 11, the inter-floor space S1, and the ceiling 21.

[0021] The floor 12 of the second room 42 on the upper floor and the ceiling 22 of the second room 44 on the lower floor are spaced apart vertically, and a second inter-floor space S2 is formed between the floor 12 and the ceiling 22. The second room 42 on the upper floor is adjacent to the second room 44 on the lower floor vertically, via the floor 12, the inter-floor space S2, and the ceiling 22.

[0022] The two rooms 41, 42 on the upper floor and the two rooms 43, 44 on the lower floor, which are adjacent to each other on the left and right, are separated by a partition wall 3 that extends vertically from the upper floor to the lower floor. That is, the two rooms 41, 42 on the upper floor are adjacent to each other on the left and right via the partition wall 3. Similarly, the two rooms 43, 44 on the lower floor are adjacent to each other on the left and right via the partition wall 3.

[0023] The partition wall 3 is a drywall, and sound-absorbing material 33 is tightly packed between a pair of surface members (first surface member 31 and second surface member 32). The thickness of the partition wall 3 is, for example, about 65 mm to 90 mm. The first and second surface members 31, 32 are made of, for example, plasterboard with a thickness of about 9 mm to 15 mm and covered with wallpaper. The sound-absorbing material 33 is preferably made of glass wool, rock wool, or various plastic foam materials.

[0024] The first room 41 on the upper floor is defined by the first surface member 31 and the floor 11, and the second room 42 on the upper floor is defined by the second surface member 32 and the floor 12. The first room 43 on the lower floor is defined by the first surface member 31 and the ceiling 21, and the second room 44 on the lower floor is defined by the second surface member 32 and the ceiling 22.

[0025] The partition wall 3 extends continuously across the upper floor, the inter-floor space, and the lower floor, separating the first inter-floor space S1 from the second inter-floor space S2. The first surface member 31 faces the first inter-floor space S1, and the second surface member 32 faces the second inter-floor space S2.

[0026] The first inter-floor space S1 is defined by the floor 11 of the first room 41 on the upper floor, the ceiling 21 of the first room 43 on the lower floor, and the first surface member 31. The second inter-floor space S2 is defined by the floor 12 of the second room 42 on the upper floor, and the ceiling 22 of the second room 44 on the lower floor, and the second surface member 32.

[0027] (Regarding ventilation pipes) The vent pipe 6 extends in the left-right direction in the inter-floor space and is disposed so as to penetrate the partition wall 3. Specifically, the vent pipe 6 includes a first end 61 located on the first inter-floor space S1 side, a second end 62 located on the second inter-floor space S2 side, and an intermediate portion 63 that penetrates the partition wall 3 between the first end 61 and the second end 62. The first end 61, the second end, and the intermediate portion 63 are linearly connected to form the vent pipe 6. The vent pipe 6 connects the first inter-floor space S1 and the second inter-floor space S2.

[0028] The ventilation pipe 6 is, for example, a pipe made of hard polyvinyl chloride, and the thickness is set within the range of 1.8 mm to 6.5 mm.

[0029] (About sound absorbing tubes) A sound absorbing pipe 66 is formed branching off from the second end 62 of the vent pipe 6. The sound absorbing pipe 66 is formed, for example, by opening a through hole in the side surface of the vent pipe 6 and adhering it to the side surface of the vent pipe 6 so that the through hole and the sound absorbing pipe 66 are in communication with each other. The sound absorbing pipe 66 is, for example, a pipe made of soft polyvinyl chloride. An example of a sound absorbing pipe is shown in FIG. 2. As shown in the figure, the sound absorbing pipe 66 may be a bellows-like member that can be freely deformed in shape.

[0030] The sound absorbing pipe 66 branches off from the branching portion 64 on the side of the ventilation pipe 6 and extends in a gentle curve. The sound absorbing pipe 66 extends horizontally in a direction away from the second surface member 32 in the second inter-floor space S2.

[0031] A sound absorbing material 66a is provided at the closed end of the sound absorbing tube 66. The material used for the sound absorbing material 66a is, for example, a porous material such as felt, glass wool, or urethane sponge made by foaming polyurethane.

[0032] The sound-absorbing pipe 66 is installed mainly to reduce heavy floor impact noise. Heavy floor impact noise is, for example, the low sound that reverberates on the floor below when a child jumps up and down on the floor above. The 63 Hz band (45 Hz to 90 Hz) is one of the frequencies that tends to be the determining factor for heavy floor impact noise. It is believed that sound can be efficiently absorbed by setting the length of the sound-absorbing pipe according to the wavelength of this band (note that, due to the nature of waves, a length of half the wavelength is sufficient).

[0033] Since one wavelength at 45 Hz is approximately 7.6 m and one wavelength at 90 Hz is approximately 3.8 m, it is desirable to set the length of the sound absorbing tube according to half of these wavelengths. Therefore, the length L of the sound absorbing tube 66 (the length from the branching portion 64 to the sound absorbing material 66a) is set in the range of 1.90 m to 3.82 m.

[0034] Although not shown, multiple sound absorbing tubes 66 may be provided. The multiple sound absorbing tubes 66 may each have the same length. This makes it possible to achieve a greater effect at the targeted frequency.

[0035] Furthermore, the plurality of sound absorbing tubes may have different lengths, thereby widening the frequency range in which the sound absorbing effect is exerted.

[0036] Also, for example, sound absorbing tubes of equal length and sound absorbing tubes of different lengths may be combined in different numbers, such as a combination of two sound absorbing tubes of equal length and one sound absorbing tube of different length.

[0037] The length of the sound absorbing tube 66 is not limited to the above range and may be determined according to the length of half the wavelength of the target frequency. For example, when absorbing sound at a frequency of 100 Hz, the length of the sound absorbing tube 66 may be approximately 1.7 m.

[0038] Furthermore, light floor impact noise, such as that caused when a spoon is dropped on the floor, may be dealt with by providing a separate sound-insulating material (not shown) in the first inter-floor space S1.

[0039] (How floor impact noise is transmitted) For example, when a heavy floor impact sound α1 is applied to the floor 11 of the first room 41 on the upper floor, the sound (vibration) is transmitted to the air in the first inter-floor space S1. Because the first inter-floor space S1 and the second inter-floor space S2 are connected via the ventilation pipe 6, the air in the first inter-floor space S1 can escape to the second inter-floor space S2 through the ventilation pipe 6, as shown by arrow β1. As a result, the pressure change in the first inter-floor space S1 is reduced, and the impact sound α2 radiated from the ceiling 21 of the first room 43 on the lower floor is reduced. In addition, by absorbing sounds in the 63 Hz band using the sound-absorbing pipe 66, further reduction in floor impact sound can be expected.

[0040] The present invention is particularly effective for construction methods with low floor rigidity, such as wooden construction, etc. In other words, it is possible to improve floor impact noise insulation performance without increasing floor rigidity (without increasing floor volume or structural load).

[0041] Furthermore, since the present invention can reduce the propagation of impact noise from the floor on the upper floor to the ceiling on the lower floor (the effect of air springs), it can be used in conjunction with general methods for improving floor impact sound insulation performance (methods such as supporting the ceiling with highly vibration-insulating materials or using an independent ceiling) to improve floor impact sound insulation performance.

[0042] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope.

[0043] For example, the sound absorbing pipe 66 may be disposed in the first inter-floor space S1 instead of the second inter-floor space S2. In this case, the sound absorbing pipe 66 extends toward the center (the right side of the drawing) of the first room 41 on the upper floor.

[0044] Furthermore, since the effect of the sound absorbing pipe 66 is more pronounced closer to the vibration source, the first end 61 of the ventilation pipe 6 may be extended to a position directly below the vibration source (below the floor impact sound α1), and the sound absorbing pipe 66 may branch off from this position.

[0045] The scope of the present invention is defined by the claims, rather than the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0046] 11, 12 Floor, 21, 22 Ceiling, 3 Partition wall, 31 First surface member, 32 Second surface member, 33 Sound absorbing material, 41-44 First to fourth rooms, 6 Ventilation pipe, 61 First end, 62 Second end, 63 Middle part, 64 Branch part, 66 Sound absorbing pipe, 66a Sound absorbing material, 100 Building, S1 First inter-floor space, S2 Second inter-floor space

Claims

1. A floor impact noise reduction structure that reduces the propagation of impact noise from upper floors to lower floors in a building, an inter-floor space between the floor of the upper floor and the ceiling of the lower floor; A partition wall extending from the upper floor to the lower floor, dividing the upper floor into left and right rooms, dividing the lower floor into left and right rooms, and dividing the inter-floor space into left and right rooms; In the inter-floor space, a vent pipe is provided which penetrates the partition wall from left to right and connects the left and right inter-floor spaces, The structure for reducing floor impact noise comprises a sound absorbing pipe branching off from the ventilation pipe, and a sound absorbing material is provided at the closed end of the sound absorbing pipe.

2. 2. The floor impact noise reduction structure according to claim 1, wherein the partition wall is densely filled with a sound absorbing material.

3. 2. The structure for reducing floor impact noise according to claim 1, wherein the length of the sound absorbing pipe is 1.90 m to 3.82 m.

4. 4. The floor impact noise reduction structure according to claim 1, wherein a plurality of the sound absorbing pipes are provided.

5. 5. The structure for reducing floor impact noise according to claim 4, wherein the plurality of sound absorbing pipes have the same length.

6. 5. The structure for reducing floor impact noise according to claim 4, wherein the plurality of sound absorbing pipes have different lengths.

7. This ventilation pipe is arranged to penetrate a partition wall that separates the space between the upper floor and the ceiling of the lower floor of a building into left and right, and reduces the propagation of impact noise from the upper floor to the lower floor, and includes a sound-absorbing pipe branching off from the side, with sound-absorbing material provided at the closed end of the sound-absorbing pipe.

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