JP4164564B2 - Ceiling sound insulation structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sound insulation structure for a ceiling member that has a double structure with a floor structure in a house, and more particularly to a technique for reducing heavy floor impact sound generated on the floor downstairs.
[0002]
[Prior art]
In recent years, in housing, in order to reduce the impact sound applied to the floor above the floor in the downstairs room, not only the floor structure on the floor is aimed at sound insulation, but also the ceiling member on the floor below. I am doing so.
Therefore, the ceiling member is vibrationally separated from the floor structure by suspending the ceiling base material from the suspended tree receiving material that is not directly connected to the floor structure via a suspended tree or a field edge.
[0003]
In general, in a hollow double structure formed between such a floor structure and a ceiling member, the transmitted sound to the downstairs is transmitted according to the relationship (mass law) that the transmission loss of the ceiling base material depends on its mass. It is known that the ceiling base material is attenuated according to the mass of the ceiling base material, and that the ceiling base material is vibrated as its weight increases.
On the other hand, from the viewpoint of improving vibration isolation of the ceiling member, a ceiling member is proposed in which a vibration isolation sheet made of a predetermined resin composition is laminated on a ceiling base material, and further a rigid member is combined (patent) Reference 1).
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-242356
[Problems to be solved by the invention]
However, if the weight of the ceiling base material is increased, the sound transmitted to the downstairs is attenuated and the ceiling base material is damped, but the strength of the structure for hanging the ceiling base material must be reinforced, At the construction site, there is a problem in terms of workability and safety because the worker lifts the ceiling base material that has increased in weight from the downstairs.
[0006]
In addition, the technique described in Patent Document 1 has a problem that the cost is high because there are various materials used for the vibration-proof sheet and the rigid member.
On the other hand, in a house, sound insulation measures for heavy floor impact sound among floor impact sounds can be achieved by simple and inexpensive means while reusing industrial waste discharged at the factory manufacturing stage. It is desired.
[0007]
Therefore, the object of the present invention is not to reinforce the suspension strength of the ceiling structure at the factory manufacturing stage in order to prevent the heavy floor impact sound generated on the floor in a house. In addition, from the viewpoint of cost and environmental protection, by-products such as industrial waste are reused while taking into account their reduction, and at the construction site stage, workability and safety are ensured. An object of the present invention is to provide a ceiling sound insulation structure capable of sufficiently insulating a heavy floor impact sound by such simple and inexpensive means.
[Means for Solving the Problems]
As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention have achieved a heavy floor impact sound performance of 63 Hz if the “chatter sound” over the frequency in the mid-band generated with the heavy floor impact load disappears. The knowledge that it is determined by the bandwidth of the floor and the knowledge that sufficient sound insulation against heavy-weight floor impact sound can be obtained even if the entire area between the field edges on the ceiling base material is not filled with ceiling anti-vibration materials Obtained.
The present invention has been made based on the above knowledge, and a ceiling sound insulation structure for reducing heavy floor impact sound generated in a floor structure on a floor in a house at the floor of a ceiling member disposed below the floor structure. The ceiling member is configured by laying a plurality of field edges on a ceiling base material, and a predetermined amount of ceiling vibration isolating material is pasted between the field edges on the ceiling base material, respectively. Alternatively, the ceiling vibration-damping material is configured such that the weight thereof is set within a predetermined range based on the weight of the ceiling base material and the size thereof is accommodated by forming a predetermined gap between the field edges. A ceiling vibration-proofing beam is attached to the lower surface of the ceiling base material, and the ceiling vibration-proofing beam is a predetermined number of square members based on the weight of the ceiling base material and the ceiling vibration-proof material. the ceiling sound insulation structure characterized by being composed is set to the weight It is intended to provide.
[0008]
In the case of the present invention, it is possible to improve the vibration isolation performance and transmission loss of the ceiling member simply by sticking the ceiling vibration isolation material to the ceiling base material, thereby eliminating the “chatter noise” and improving the heavy floor impact sound performance. In addition, if the remaining material is used for the ceiling vibration-proof material, it is possible to reuse the by-products such as industrial waste in consideration of the reduction from the viewpoint of cost and environmental protection.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A preferred reference example of the ceiling sound insulation structure according to the present invention will be described with reference to the drawings.
As shown in FIG. 1 or FIG. 2, the ceiling sound insulation structure 1 of the present reference example is arranged at the lower part of the second floor structure, which generates heavy floor impact sound generated in the second floor structure on the floor in a house. This is a structure that decreases below the ceiling member 20.
The ceiling member 20 is configured by laying a plurality of ceiling field edges (field edges) 31 on a ceiling base material 21. A predetermined amount of a ceiling vibration isolating plate (ceiling vibration isolating material) 22 is affixed or placed between the ceiling field edges 31 on the ceiling base material 21.
The ceiling vibration isolator 22 has a weight that is set within a predetermined range based on the weight of the ceiling base material 21 and has a size that fits in a predetermined gap between the ceiling edges 31. Yes.
Hereinafter, the living room unit 2 in the wooden unit house provided with the ceiling sound insulation structure 1 will be described in detail.
[0010]
As shown in FIGS. 1 to 3, the living room unit 2 is illustrated in addition to the second-floor structure 10 and the first-floor ceiling member 20 on the outer frame 5 including a plurality of girders 3 a, 3 b and a pillar 4. However, it is configured by attaching wall materials, a first floor structure, and the like. The living room units 2 are connected to each other on one side surface of the outer frame body 5.
[0011]
As shown in FIG. 2, the second-floor floor structure 10 is configured by arranging a plurality of floor joists 11 on an outer frame body 5 and laying a floor base material 12 on the floor joists 11. A suspended tree receiving member 32 is attached to the outer frame body 5 so as to be arranged between the floor joists 11 in parallel therewith.
[0012]
The first floor ceiling member 20 has a ceiling base material 21 suspended from a suspended tree receiving member 32 via a suspended tree 33 and a ceiling field edge 31, and such a suspended structure 30 vibrates to a second floor structure. 10 and is configured so as to form a hollow double structure with the second floor structure 10.
[0013]
The ceiling base material 21 is formed in a rectangular plate shape using a material made of a gypsum board.
The weight of the ceiling base material 21 is 59 N / m ^{2 to} 100 N / 100 from the viewpoint of attenuating sound transmitted to the downstairs, the vibration isolation of the ceiling base material 21 itself, and the strength of the suspension structure 30. It is set within the range of m ² .
[0014]
As shown in FIG. 1 or 3, the ceiling edge 31 is attached to a position that surrounds the periphery of the ceiling base material 21, and is further attached to a position that divides the enclosed region into a predetermined number in the short side direction. It has been. As a result, an anti-vibration material pasting region 21 a to which the ceiling anti-vibration plate 22 can be pasted is formed on the ceiling base material 21.
[0015]
The wall slab and floor slab are formed in a rectangular plate shape using materials such as siding, structural plywood, die light, and particle board, for example.
[0016]
From the viewpoint of reusing industrial waste, the ceiling vibration isolator 22 is, for example, a ceiling base material 21 or a remaining material of a wall material (gypsum board, siding, die light, etc.) or a remaining material of a floor slab (structural plywood) , Particle board, etc.).
[0017]
The ceiling vibration isolator 22 is not particularly limited in its shape, but from the viewpoint of simply attaching to the ceiling base material 21, if the size of the remaining material is larger than the area of the vibration isolator application region 21a, The remaining material is cut and processed, for example, formed into a rectangular plate shape or a shape conforming thereto. Further, from the same viewpoint as described above, when the size of the remaining material is smaller than the area of the vibration-proofing material attaching region 21a, the ceiling vibration-proofing plate 22 is used as it is, or the remaining material is used as described above. Used in the form of a rectangular plate.
From the viewpoint of forming a predetermined gap between the ceiling field edges 31, the size of the ceiling vibration isolation plate 22 is different from that of the vibration isolation material pasting area 21 a in that the space between the ceiling field edges 31 is 455 mm, for example. It is preferable to set the gap between the field edge 31 and the ceiling vibration isolator 22 within a range of 40 mm to 80 mm.
[0018]
The ceiling antivibration plate 22 has a total weight including the ceiling base material 21 of the suspension structure 30 from the viewpoint of reinforcing the transmission loss and vibration isolation performance of the ceiling base material 21 itself with respect to the number to be attached and the total weight thereof. As long as the strength is not exceeded, for example, the number of sheets to be applied to the ceiling base material 21 having a size of 910 mm × 1820 mm is set within a range of 1 to 4 sheets, and the total weight is 15N to 324N. It is set within the range.
[0019]
The single weight of the ceiling vibration isolator 22 is adjusted by changing the number of overlapping and the size thereof. For example, since the ceiling base material 21 and the wall material have different surface densities, the ceiling vibration isolator 22 is used in a three-layer manner when the same material as the ceiling base material 21 is used, and when the same material as the wall material is used. Used with only one sheet.
[0020]
Hereinafter, a method for manufacturing the first floor ceiling member 20 will be described.
In the factory manufacturing stage, the ceiling base material 21 is cut into a size determined for each room unit 2 in the manufacturing process of the ceiling base material 21.
Here, the remaining material generated by processing the ceiling base material 21 or the remaining material stocked in advance in the manufacturing process of the wall material is used as it is for the ceiling vibration isolator 22 or the remaining material is cut. Thus, the ceiling vibration isolator 22 is formed in the desired shape and size described above.
[0021]
In the above process or another manufacturing process, the ceiling edge 31 is assembled in a ladder shape, and the ceiling base material 21 is attached to the ceiling edge 31. Then, a predetermined number of ceiling vibration isolator plates 22 are attached to predetermined positions.
[0022]
There are wooden screws, double-sided tapes, woodworking bonds, etc., from the viewpoint of ease of work, etc., as the method for fixing the ceiling vibration isolator 22, and instructions on which to use are in the contents of the work instruction sheet. included. From the viewpoint of further simplifying workability, the ceiling vibration isolator 22 may only be placed on the ceiling base material 21.
At the assembly stage of the factory, the ceiling panel edge 31 has a ladder shape, and a ceiling panel in which the ceiling vibration isolator 22 is attached to the ceiling base material 21 is attached to the outer frame body 5. After that, at the construction site, after attaching the second floor structure 10 and the suspension tree receiving material 32 to the outer frame 5 of the living room unit 2, it is assembled in advance under the suspension tree 33 fixed to the suspension tree receiving material 32. A certain ceiling edge 31 and hanging tree 33 are attached.
[0023]
Hereinafter, the operation of the ceiling sound insulation structure 1 will be described.
When a heavy floor impact load is applied to the second floor structure 10, a heavy floor impact sound of a low frequency range called “Don” is emitted mainly due to the bending vibration of the second floor structure 10.
In this case, the first-floor ceiling member 20 is vibrationally separated from the first-floor structure 10 by the suspension structure 30, but is not completely separated.
For this reason, the vibration of the second floor structure 10 propagates through the outer frame body 5 so that the first floor ceiling member 20 vibrates. The first-floor ceiling member 20 also vibrates by receiving a heavy floor impact sound directly.
However, since the ceiling base material 21 is weighted by the ceiling vibration isolator 22 in the first-floor ceiling member 20, the vibration of the ceiling base material 20 is suppressed and the noise accompanying the vibration is reduced.
[0024]
On the other hand, in the hollow double structure between the second-floor floor structure 10 and the first-floor ceiling member 20, the transmission loss of the ceiling base material 21 is improved by weighting using the ceiling vibration isolator 22 according to the mass rule. Therefore, the transmitted sound to the downstairs due to the heavy floor impact sound is attenuated.
[0025]
As described above, according to this reference example , since the remaining material generated during the processing of the ceiling base material 21 and the wall material is reused as the ceiling vibration isolator 22, the heavy floor impact sound generated on the floor is obtained. From the viewpoint of cost, the material used for the ceiling vibration isolator 22 is not required separately and should be achieved by inexpensive means, and should be discarded from the viewpoint of environmental protection. While reducing the amount of waste material (industrial waste), heavy floor impact noise can be sufficiently insulated downstairs.
[0026]
Further, according to the present embodiment, since only needs to attach or mount the ceiling proof oscillation plate 22 to the ceiling base member 21 in the same manufacturing process can be easily performed sound insulation measures heavy floor impact sounds.
[0027]
Furthermore, according to this reference example , since the total weight of the first-floor ceiling member 20 is limited within a certain range while taking measures for sound insulation of heavy floor impact sound only in the required living room unit 2, it is manufactured at the factory. At this stage, it is not necessary to reinforce the strength of the suspension structure 30, and workability and safety can be ensured at the construction site stage.
[0028]
Hereinafter, a preferred embodiment of a ceiling sound insulation structure according to the present invention will be described.
As shown in FIG. 4, the ceiling sound insulation structure 1 </ b> A of the present embodiment is provided with a ceiling vibration-proofing beam 50 attached to the lower surface (downstairs surface) of the ceiling base material 21, and this is different from the above reference example .
The ceiling anti-vibration beam 50 is configured by using, for example, three identical square members 51 from the nominal types 204 and 206 and the like so that the cross-sectional shape is substantially U-shaped.
The ceiling vibration-proofing beam 50 is attached using nails in a direction perpendicular to the short side direction of the ceiling edge 31. The length of the ceiling anti-vibration beam 50 is set to the interval between the wall materials facing each other.
[0029]
The ceiling vibration isolating beam 50 includes the ceiling base material 21 and the ceiling vibration isolation plate 22 from the viewpoint of reinforcing the transmission loss and the vibration isolation performance of the ceiling base material 21 and the ceiling vibration isolation plate 22 with respect to the number and weight of the ceiling vibration isolation beams 50. As long as the total weight does not exceed the strength of the suspension structure 30, the mounting interval is set in the range of 910 mm to 1820 mm, and the total weight per unit length is in the range of 50 N / m to 80 N / m. Is set in.
[0030]
As described above, according to the present embodiment, since the ceiling vibration isolating beam 50 is attached to the ceiling base material 21 in addition to the ceiling vibration isolating plate 22, the ceiling vibration isolating plate 22 alone can reduce the vibration isolating performance. These can be compensated if the transmission loss is not sufficient.
In particular, when the ceiling anti-vibration beam 50 is attached at a construction site, the total weight of the first-floor ceiling member 20 in the reference example is further limited to ensure workability and safety, and the first-floor ceiling member 20 is secured. It is advantageous in that it is possible to reinforce the sound insulation measures against heavy floor impact sound by attaching the ceiling vibration-proofing beam 50 from the downstairs after the installation.
[0031]
Moreover, in the case of this embodiment, although the ceiling vibration isolating beam 50 is not specifically limited about the attachment position, it can be attached to the location where the ceiling vibration isolator 22 cannot be pasted as well as the 1st floor room. This is advantageous.
[0032]
Although not the object of the present invention, as a reflective effect of the present embodiment, the ceiling anti-vibration beam 50 further reinforces the function of reinforcing the ceiling base material 21 included in the ceiling field edge 31, while There exists a point which can make the cross section of the field edge 31 small.
[0033]
The present invention is not limited to the above-described embodiment , and various changes can be made.
[0034]
The ceiling sound insulation structure of the present invention can be applied not only between the first floor and the second floor, but also between the second floor and the third floor, and also to the floor and ceiling on that floor.
[0035]
[Evaluation test example]
The present inventors evaluated the frequency characteristics of heavy floor impact sound according to “Measurement method of floor impact sound insulation performance of building: Method using standard weight impact source (JISA 1418-2)”.
[0036]
<Evaluation test 1>
Evaluation was made using the second floor room as a sound source room, the first floor room below as a sound receiving room, and using three ceiling vibration isolator plates 22 on the ceiling base material 21 directly under the floor of the sound source room.
[0037]
<Evaluation test 2>
In addition to using three ceiling vibration isolator plates 22 for the ceiling base material 21 used in the evaluation test 1, evaluation was performed using a ceiling anti-vibration beam 50.
[0038]
For Evaluation Test 1 and Evaluation Test 2, the relationship between the octave band center frequency (Hz) and the floor impact sound level (dB) and the relationship between the L-value reference curves are shown in FIG. The results of the evaluation test 1 are plotted with black circle marks, and the results of the evaluation test 2 are plotted with white triangle marks.
[0039]
As shown in FIG. 5, the “chatter noise” generated with the heavy floor impact load on the second floor disappeared by using the ceiling vibration isolating plate 22 and the ceiling vibration isolating beam 50. As a result, it has been clarified that the floor impact sound level is lowered in the middle band, and the L value is determined in the 63 Hz band. Further, it has been clarified that sufficient sound insulation of heavy floor impact sound can be obtained even if a gap is generated between the ceiling edge 31 and the ceiling vibration isolator 22 in the vibration isolator pasting region 21a.
[0040]
【The invention's effect】
According to the present invention, in the case of a factory manufacturing stage, in order to take measures against sound insulation of heavy floor impact sound generated on the floor, in a house, without reinforcing the suspension strength of the ceiling structure, In addition, industrial waste is reused from the viewpoint of cost and environmental protection, and at the construction site stage, workability and safety are ensured. Can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of a ceiling sound insulation structure of a reference example .
FIG. 2 is a side sectional view showing a schematic configuration of the ceiling sound insulation structure.
FIG. 3 is a plan view showing an arrangement state of a ceiling vibration isolating plate having the ceiling sound insulation structure (unit number U1).
FIG. 4 is a side sectional view showing a schematic configuration of the ceiling sound insulation structure of the embodiment .
FIG. 5 is a diagram showing frequency characteristics of heavy floor impact sound evaluated in the ceiling sound insulation structure of the reference example and the embodiment .
[Explanation of symbols]
2 Living room unit 10 2nd floor structure (floor structure)
20 1st floor ceiling member (ceiling member)
21 Ceiling base material 22 Ceiling vibration isolator (ceiling anti-vibration material)
50 Anti-vibration beam for ceiling

Claims (2)

A ceiling sound insulation structure that reduces a heavy floor impact sound generated in a floor structure on a floor in a house on a floor below a ceiling member disposed in the lower part of the floor structure,
The ceiling member is configured by laying a plurality of field edges on a ceiling base material, and a predetermined amount of ceiling vibration isolating material is pasted or placed between the field edges on the ceiling base material, respectively. ,
The ceiling vibration-proof material is made into a shape set the weight based on the weight of the ceiling base member in a predetermined range and whose size fit to form a predetermined gap between the field edge ,
A ceiling anti-vibration beam is attached to the lower surface of the ceiling base material, and the ceiling anti-vibration beam is set to a predetermined weight from a predetermined number of square members based on the weight of the ceiling base material and the ceiling anti-vibration material. Ceiling sound insulation structure characterized by being configured .
A sound insulation structure for ceilings.   The ceiling sound insulation structure according to claim 1, wherein the ceiling vibration isolator is the ceiling base material or the remaining material of the house.

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