JP6118622B2 - Soundproof structure of ceiling - Google Patents

Description

  The present invention relates to a soundproof structure for a ceiling that suppresses propagation of floor impact sound from the upper floor to the lower floor of a building.

  Generally, in a building such as an apartment house, a ceiling plate on a lower floor and a floor material on an upper floor are connected by a plurality of connecting members called suspension trees. Specifically, a plurality of long members called field edges are fixed to each other at a predetermined interval on the upper surface (ie, the back surface) of the ceiling board, and the lower end of the suspension tree is directly or via a field edge receiver. Are connected. The upper end of the suspension tree is connected to a beam that supports the flooring from below. Thus, the ceiling board is a structure suspended from the floor material by a plurality of suspension trees. In such a ceiling structure, Patent Documents 1 and 2 disclose techniques for suppressing floor impact sound that propagates from a floor material on an upper floor to a ceiling board on a lower floor.

  In Patent Document 1, a bag-like material is filled with a powder having an average particle diameter of 0.1 to 1000 μm that exhibits sound absorbing performance by vibration of particles, and this is used to improve the soundproofing performance of the ceiling. In Japanese Patent Application Laid-Open No. H10-230, it is disclosed that it is used for a ceiling filler as a sound absorbing material.

  In Patent Literature 2, charcoal having a bulk density of 0.104 kg / l to 0.151 kg / l is laid down to a height of 7 cm to 15 cm on a perforated board for sound absorption such as gypsum board to suppress floor impact sound. A ceiling structure is disclosed.

JP 09-114468 A Japanese Patent No. 4550609

  In the technique of Patent Document 1, it is difficult to handle because the powder filled in the bag-like material is fine, and there is a possibility that the bag will leak from the bag-like material and stain the ceiling.

  In the technique of Patent Document 2, there is a problem that only a soundproof performance equivalent to that of a conventional soundproof ceiling can be exhibited, as described in paragraph 0056 of the same document. Specifically, referring to FIG. 7 of the same document, experiment numbers 2 to 5 as examples relate to the evaluation of heavy floor impact sound (bang), and the conventional soundproofing material such as glass wool and rock wool is used for the ceiling laying material. These are the same levels as those of Comparative Examples 2 and 3 and Comparative Example 1 in which no soundproofing measures are taken and there is no ceiling laying material.

  Therefore, an object of the present invention is to provide a soundproof structure for a ceiling that can satisfactorily suppress a heavy floor impact sound propagating from an upper floor to a lower floor without using a fine soundproof material.

In order to solve the above problems, the present invention provides a plurality of connecting members for connecting a lower floor ceiling plate and an upper floor material, and fixed to the upper surface of the ceiling plate at a predetermined interval. A ceiling soundproof structure including a plurality of long members to which lower ends are connected, wherein the weight of the ceiling plate per each divided region is divided into each divided region in which the upper surface of the ceiling plate is partitioned by the long member. A soundproof material having a larger weight is placed , and a plurality of the soundproof materials are filled in a bag-like material, and a plurality of the bag-like materials are arranged with a gap in each partition region. The soundproof structure of the ceiling (claim 1).

  In a ceiling structure in which the lower floor ceiling plate and the upper floor are connected by a plurality of connecting members, heavy floor impact sounds (such as a child's jumping sound) generated by the upper floor are It reaches the ceiling board on the lower floor through the connecting member from the material and shakes the ceiling board. Thereby, a heavy floor impact sound propagates from the upper floor to the lower floor (solid propagation sound). Further, since the plurality of long members are fixed to the upper surface of the ceiling plate at a predetermined interval, the long members serve as a vibration node of the ceiling plate. Therefore, each partition area partitioned by the long member is a unit of vibration when the ceiling board vibrates.

  In such a ceiling structure, according to the present invention, the ceiling per each partition area is provided in each partition area in which the top surface of the ceiling board is partitioned by a plurality of long members fixed to the top surface of the ceiling board at a predetermined interval. Since the soundproofing material with a weight greater than the weight of the board is placed, the vibration energy of the solid propagation sound that shakes the ceiling board is also consumed to shake the soundproofing material placed on the top surface of the ceiling board. . Therefore, the vibration energy from the upper floor is dispersed, the vibration energy transmitted to the ceiling board is reduced, and the degree to which the ceiling board shakes is reduced. Thereby, the heavy floor impact sound which propagates from the upper floor to the lower floor is suppressed.

  In that case, since the weight per partition area is the same as or larger than the weight of the soundproofing material, the vibration energy distribution is the same as the soundproofing material distribution. More than that is allocated. Therefore, vibration energy transmitted to the ceiling plate is surely reduced, and propagation of heavy floor impact sound from the upper floor to the lower floor is efficiently suppressed.

Moreover, since the shape, dimensions, and the like of the soundproof material are not particularly limited, according to the present invention, it is not necessary to use, for example, a fine soundproof material that is difficult to handle. Thereby, the soundproof structure of the ceiling which can suppress a heavy floor impact sound favorably without using a fine soundproof material is provided.
In addition, since the soundproofing material can be placed on the top surface of the ceiling plate simply by placing the bag-like object on the top surface of the ceiling plate, the workability of placing the soundproofing material on the ceiling plate is improved. Moreover, since it is not necessary to use a fine soundproofing material, the problem that the soundproofing material leaks from the bag-like material and stains the back of the ceiling is avoided.

  In the present invention, preferably, the soundproofing material is porous (claim 2).

  As described above, the present invention utilizes the fact that the soundproofing material intercepts the vibration energy of the solid-propagating sound from the upper floor, thereby reducing the solid-propagating sound propagating to the ceiling board. According to this, since the soundproof material is porous, the soundproof material has a sound absorbing function. Therefore, the sound generated in the floor material on the upper floor travels through the air and the air propagation sound that reaches the ceiling board on the lower floor is absorbed by the porous soundproofing material, and the heavy floor impact sound propagates from the upper floor to the lower floor. It is further suppressed.

In the present invention, preferably, the soundproofing material has an average volume of 0.2 cm ³ or more and 500 cm ³ or less (claim 3 ).

  According to this configuration, the size of each soundproof material is not excessively small and is not excessively large, and handling is further facilitated. In addition, the problem of leakage of the soundproof material from the bag-like material is further suppressed.

  Since the present invention provides a soundproof structure for a ceiling that can satisfactorily suppress heavy floor impact sound propagating from the upper floor to the lower floor without using a fine soundproof material, a technique for soundproofing measures in an apartment house such as an apartment Contribute to the development and improvement of

It is sectional drawing which shows the soundproof structure of the ceiling which concerns on embodiment of this invention. FIG. It is a table | surface which shows the evaluation result of a heavy floor impact sound (bang).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(1) Overall Configuration FIG. 1 is a cross-sectional view showing a soundproof structure for a ceiling according to the present embodiment, and the ceiling between a ceiling plate 1 in a lower floor room and a floor material 2 in an upper floor room. The structure is shown.

  The ceiling board 1 and the flooring 2 are connected to each other by a beam 3, a suspended tree (connecting member) 4, and a field edge (long member) 5 in order from above. That is, the building has a plurality of pillars extending in the vertical direction outside the figure, and a plurality of beams 3 extending in the horizontal direction are spanned in parallel between these pillars. The flooring 2 is laid above these beams 3. That is, the beam 3 supports the flooring 2 from below.

  An upper end portion of a suspension tree 4 extending in the vertical direction is connected to the side surface of the beam 3. A plurality of suspension trees 4 are provided, and a lower end portion of each suspension tree 4 is connected to a field edge 5 extending in the horizontal direction. A plurality of field edges 5 are provided, and each field edge 5 is arranged in parallel to each other at a predetermined interval, and is fixedly coupled to the upper surface (back surface) of the ceiling board 1.

  Here, the beam 3, the suspension tree 4 and the field edge 5 constitute one suspension unit 6 as a whole. A plurality of suspension units 6 are provided. That is, in the ceiling structure according to this embodiment, the lower floor ceiling plate 1 and the upper floor material 2 are connected by a plurality of suspension trees 4, and the ceiling plate 1 is composed of a plurality of suspension trees 4 or a plurality of suspension units. 6 is a structure suspended from the flooring 2. Therefore, a space (ceiling back space) 7 is formed between the ceiling board 1 and the flooring 2.

  The suspending unit 6 may further include a plurality of joists extending between the beam 3 and the flooring 2 in a direction orthogonal to the beam 3. In that case, the joists are connected to the beams 3, and the joists support the flooring 2 from below instead of the beams 3. Further, a plurality of field edge receivers 5 a (see FIG. 2) extending in a direction orthogonal to the field edge 5 may be further included between the field edge 5 and the hanging tree 4. In that case, the field edge receiver 5 a is coupled to the field edge 5, and the lower end portion of the suspension tree 4 is connected to the field edge receiver 5 a instead of the field edge 5.

  In such a ceiling structure, the heavy floor impact sound (bang) generated in the floor material 2 on the upper floor propagates from the floor material 2 through the beam 3, the suspended tree 4, the field edge 5, and the like, that is, solid propagation. The sound reaches the ceiling board 1 on the lower floor as a sound and shakes the ceiling board 1 and propagates air, that is, reaches the ceiling board 1 on the lower floor as an air propagation sound, and shakes the ceiling board 1.

  In the present embodiment, the soundproof material 10 is placed on the upper surface (back surface) of the ceiling board 1 in order to suppress such heavy floor impact sound that propagates from the upper floor to the lower floor.

  Specifically, as shown in FIG. 2, a region where the upper surface of the ceiling board 1 is partitioned by a plurality of field edges 5. In FIGS. 1 and 2, the symbol P indicates a connecting portion between the ceiling board 1 and the field edge 5. That is, the partition region R is a region surrounded by the coupling portion P. In FIG. 2, the suspension tree 4 is connected to the field edge 5 in correspondence with FIG. 1, but this is not shown.

  Here, since the plurality of field edges 5 are fixed to the upper surface of the ceiling board 1 at a predetermined interval, the field edges 5 or the connecting portions P serve as nodes of vibration of the ceiling board 1. Therefore, each partition area R partitioned by the field edge 5 is a unit of vibration when the ceiling board 1 vibrates.

In each partition region R, a soundproof material 10 having a weight larger than the weight of the ceiling plate 1 per partition region R is placed on the top surface of the ceiling plate 1. For example, when the weight of the ceiling board 1 per 1 m ² is 3 kg, the soundproofing material 10 is set so that the weight of the soundproofing material 10 per 1 m ² is 3 kg or more (for example, 3 kg to 4.5 kg). Is placed on the upper surface of the ceiling board 1 in each partition region R. For example, when the weight of the ceiling board 1 per 1 m ² is 15 kg, the soundproofing material 10 is set so that the weight of the soundproofing material 10 per 1 m ² is 15 kg or more (for example, 15 kg to 23 kg). Is placed on the upper surface of the ceiling board 1 in each partition region R. In addition, the upper limit of the mounting weight of the soundproof material 10 is preferably about 1.5 times the weight of the ceiling board 1, for example.

  In the present embodiment, in the partition region R, the soundproof material 10 is placed on the upper surface of the ceiling board 1 in a state where a plurality of the soundproof materials 10 are filled in the bag-like object 11. This bag 11 is a sandbag made of polyethylene, for example. However, the sandbag is not limited to polyethylene but may be made of other materials. Moreover, the bag-shaped object 11 can also use not only a sandbag bag but the bag-shaped object of another form.

  When the size of the bag-like object 11 is, for example, 500 mm × 500 mm, although depending on the specific gravity of the sound-insulating material 10, the bag-like object 11 is filled with, for example, 1.0 kg to 2.0 kg of the sound-insulating material 10.

  The soundproofing material 10 is not particularly limited in its shape, size, volume per piece, specific gravity, weight per piece, number placed on the ceiling board 1, material, and the like. For example, the shape may be any of block shape, spherical shape, cylindrical shape, prismatic shape, pellet shape, sheet shape, flake shape, granular shape, powdery shape, and the like. The dimensions are not particularly limited. However, from the viewpoint of handling and the viewpoint of leakage from the bag 11, the soundproof material 10 is prevented from becoming excessively fine. For example, the average diameter is preferably 1 mm or more, and more preferably 2 mm or more. Although an upper limit is not specifically limited, From a handling viewpoint, it is 100 mm or less, for example.

The average volume per one soundproofing material 10, for example, 0.2 cm ³ or more, preferably 500 cm ³ or less, the specific gravity of the soundproof material 10, for example 0.1 or higher, preferably 2.0 or less, the average per one For example, the weight is preferably 0.1 g or more and 100 g or less. These may be appropriately determined depending on the balance with the number of the soundproofing materials 10 placed on the ceiling board 1. However, it is preferable to avoid the soundproofing material 10 having an excessively small specific gravity so that the soundproofing material 10 placed on the ceiling board 1 is not bulky and the ceiling space 7 is not too narrow. Also, the average volume per one sound insulator 10 0.2 cm ³ or more, by a 500 cm ³ or less, it is one those proper size of one of the soundproofing material 10 becomes more easy to handle . Further, the problem of leakage of the soundproof material 10 from the bag-like object 11 is further suppressed.

  The soundproofing material 10 is, for example, a solid resin molded product, a foamed resin molded product, a hollow resin molded product, a pulverized product of these resin molded products, a piece of wood, a wood powder pellet obtained by solidifying wood powder with an adhesive, charcoal, etc. May be used. The type of the resin is not particularly limited, but, for example, polystyrene can be preferably used. The expansion ratio of the foamed resin molded product is not particularly limited, but is preferably in the range of 1.5 to 3.0, for example.

(2) Action, etc. In the present embodiment, a plurality of suspension trees 4 connecting the ceiling plate 1 on the lower floor and the floor material 2 on the upper floor are fixed to the upper surface of the ceiling plate 1 at predetermined intervals, and the suspension In the soundproof structure of the ceiling including the plurality of field edges 5 to which the lower ends of the trees 4 are connected, the following characteristic configuration is adopted.

  That is, the soundproofing material 10 having a weight larger than the weight of the ceiling plate 1 per partition region R is placed in each partition region R in which the upper surface of the ceiling plate 1 is partitioned by the field edge 5. .

  In a ceiling structure in which the lower-floor ceiling board 1 and the upper-floor flooring 2 are connected by a plurality of suspension trees 4, a heavy floor impact sound (for example, a child's jumping sound) generated by the upper-floor flooring 2 ) Reaches the ceiling board 2 on the lower floor through the suspension tree 4 from the floor material 2 and shakes the ceiling board 2. Thereby, a heavy floor impact sound propagates from the upper floor to the lower floor (solid propagation sound).

  Further, since the plurality of field edges 5 are fixed to the upper surface of the ceiling board 1 at a predetermined interval, the field edges 5 or the connecting portions P serve as vibration nodes of the ceiling board 1. Therefore, each partition area R partitioned by the field edge 5 is a unit of vibration when the ceiling board 1 vibrates.

  In such a ceiling structure, according to the present embodiment, each partition region R is defined by partitioning the top surface of the ceiling plate 1 with a plurality of field edges 5 fixed to the top surface of the ceiling plate 1 at a predetermined interval. Since the soundproofing material 10 having a weight larger than the weight of the ceiling plate 1 per R is placed, the soundproofing material in which the vibration energy of the solid propagation sound that shakes the ceiling plate 1 is placed on the upper surface of the ceiling plate 1 is installed. It is also consumed to shake the material 10. Therefore, vibration energy from the upper floor is dispersed, vibration energy transmitted to the ceiling board 1 is reduced, and the degree to which the ceiling board 1 is shaken is reduced. Thereby, the heavy floor impact sound which propagates from the upper floor to the lower floor is suppressed.

  In this case, since the weight per each divided region R is equal to or larger than the weight of the soundproof material 10, the vibration energy is distributed to the soundproof material 10 from the soundproof material 10. Will be allocated the same or more than Therefore, the vibration energy transmitted to the ceiling board 1 is surely reduced, and the propagation of heavy floor impact sound from the upper floor to the lower floor is efficiently suppressed.

  Moreover, since the shape, dimensions, and the like of the soundproof material 10 are not particularly limited, according to the present embodiment, for example, it is not necessary to use a fine soundproof material that is difficult to handle. Thereby, the soundproof structure of the ceiling which can suppress a heavy floor impact sound favorably without using a fine soundproof material is provided.

  In the present embodiment, preferably, the soundproof material 10 is porous.

  As described above, the present embodiment utilizes the fact that the soundproofing material 10 intercepts the vibration energy of the solid propagation sound from the upper floor, thereby reducing the solid propagation sound propagating to the ceiling board 1. When the soundproofing material 10 is porous, the soundproofing material 10 has a sound absorbing function. Therefore, the sound generated in the floor material 2 on the upper floor is transmitted to the air and reaches the ceiling plate 1 on the lower floor, and the sound transmitted through the air is absorbed by the porous soundproofing material 10 and the heavy floor impact sound from the upper floor to the lower floor. Propagation is further suppressed.

  In the present embodiment, the soundproofing material 10 is placed on the upper surface of the ceiling board 1 in a state where a plurality of the soundproofing materials 10 are filled in the bag-like object 11.

  According to this configuration, since the soundproofing material 10 can be placed on the top surface of the ceiling board 1 simply by placing the bag-like object 11 on the top surface of the ceiling board 1, the soundproofing material 10 is placed on the ceiling board 1. Installation workability is improved. Moreover, since it is not necessary to use a fine soundproof material, the problem that the soundproof material 10 leaks out from the bag-like object 11 and stains the back of the ceiling is avoided.

In the present embodiment, the soundproofing material 10 has an average volume of 0.2 cm ³ or more and 500 cm ³ or less.

  According to this configuration, the size of each soundproof material 10 is not excessively small and is not excessively large, and handling is further facilitated. Further, the problem of leakage of the soundproof material 10 from the bag-like object 11 is further suppressed.

(3) Soundproof test The soundproof structure of the ceiling shown in FIGS. 1 and 2 was subjected to a soundproof test in accordance with the test method defined in JIS A1418. The floor impact sound is generated from the floor material 2 using a heavy floor impact sound generator (bang machine), and the floor impact sound generated by the impact is received below the ceiling board 1 and received. The sound pressure level was measured for each frequency band. The weight of the ceiling board 1 was 6.0 kg / m ² . The results are shown in FIG. 3 (Evaluation of heavy floor impact sound).

[Example 1]
Soundproofing material: foamed resin molded product (polystyrene, foaming ratio 2.2 times, specific gravity 0.48) crushed material (average diameter 43 mm × 43 mm × 50 mm block shape, average volume 92 cm ³ per piece, per piece Average weight of 40.8g)
-Placement weight on the ceiling plate: 6.0 kg / m ²
-Placement: Filling a plurality of bags into a bag and laying-Bags: Polyethylene sandbag (500mm x 500mm)
・ Filling amount: 1.5kg

[Example 2]
Soundproofing material: wood powder pellets made of wood powder (average particle size 300 μm) hardened with an adhesive (specific gravity 1.5, average diameter 6 mm × 10 mm pellets, average volume 0.270 cm ³ per piece)
-Placement weight on the ceiling plate: 9.0 kg / m ²
-Placement: Filling a plurality of bags into a bag and laying-Bags: Polyethylene sandbag (500mm x 500mm)
・ Filling amount: 1.5kg

[Example 3]
Soundproofing material: charcoal (specific gravity 0.15, average diameter 5 mm × 15 mm, average volume per piece 0.35 cm ³ )
-Placement weight on the ceiling plate: 6.0 kg / m ²
-Placement: Filling a plurality of bags into a bag and laying-Bags: Polyethylene sandbag (500mm x 500mm)
・ Filling amount: 1.5kg

[Comparative example]
・ Soundproofing material: Sound absorbing wool (glass wool)
-Placement weight on the ceiling plate: 1.5kg / m ² (Because the specific gravity is small, it cannot be placed in the ceiling space 7 any more)
・ Mounting style: Cut and lay

[Reference example]
・ Soundproofing material: not placed

[Consideration of results]
From the results of FIG. 3, it can be seen that Examples 1 to 3 are superior to the comparative example using sound absorbing wool as a soundproofing material and the reference example without soundproofing regarding the evaluation of heavy floor impact sound (bang).

  That is, in Examples 1 to 3 in which the soundproofing material was placed more than the weight of the ceiling board 1 per unit area, the comparative example and reference in which the soundproofing material was not placed more than the weight of the ceiling board 1 per unit area. Compared with the example, the sound pressure level in each frequency band of 31.5 Hz and 63 Hz was low, and the L number and L value of the heavy floor impact sound were low. This indicates that in Examples 1 to 3, the heavy floor impact sound propagating from the upper floor to the lower floor was well suppressed.

Among Examples 1 to 3, the evaluation of Example 1 was particularly good. That is, Example 1 shows a numerical value lower than Example 3 when the soundproofing material is placed on the same weight (6.0 kg / m ² ) as the ceiling board 1 per unit area.

DESCRIPTION OF SYMBOLS 1 Ceiling board 2 Flooring material 3 Beam 4 Suspended tree (connection member)
5 Field edge (long member)
5a Field edge receiver 6 Suspension unit 7 Ceiling space 10 Soundproof material 11 Bag-shaped object P Joint part R Partition area

Claims (3)

A plurality of connecting members for connecting the lower floor ceiling plate and the upper floor material;
A ceiling soundproof structure including a plurality of long members fixed to the upper surface of the ceiling plate at a predetermined interval and connected to the lower ends of the connecting members,
A soundproof material having a weight larger than the weight of the ceiling plate per each divided area is placed on each divided area obtained by dividing the upper surface of the ceiling board with the long member ,
A plurality of the above soundproofing materials are filled in a bag-like material,
A ceiling soundproof structure in which a plurality of the bag-like objects are arranged in each partition region with a gap .   The soundproof structure for a ceiling according to claim 1, wherein the soundproof material is porous. The soundproofing material has an average volume per one is 0.2 cm ³ or more and 500 cm ³ or less, ceiling soundproof structure according to claim 1 or 2.

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