JP2003232058A - Soundproof construction and soundproof member for underfloor piping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soundproof construction for underfloor piping, which not only facilitates maintenance of the underfloor piping but also sufficiently prevents noises at the underfloor piping. <P>SOLUTION: There is provided the soundproof construction 1 for the underfloor piping, which is formed of a floor 2, the underfloor piping 3, and a foundation 4 of a building. In the soundproof construction 1, the foundation 4 is formed of earthen floor concrete, and the underfloor piping 3 is arranged in an underfloor space defined by the earthen floor concrete and the floor 2. The underfloor piping 3 is comprised of a floor penetrating pipe 5 which penetrates the floor 2, a horizontal pipe 6, and a joint pipe 7 which communicates between the floor penetrating pipe 5 and the horizontal pipe 6. The joint pipe 7 is subjected to soundproof processing by means of a soundproof member 8. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof structure and a soundproof member for noise of water supply and drainage of a house, which noise is generated in a joint pipe used for underfloor pipes, an offset pipe, and a pipe near the joint pipe and the offset pipe. .

[0002]

2. Description of the Related Art In recent years, noise inside a dwelling unit has been highlighted as the sound insulation performance and heat insulation performance of a boundary wall of a house have been improved. Water supply and drainage noise became a problem, and nowadays, in most homes, pipe noise control measures are taken inside the ceiling and pipe spaces of living quarters.

The pipe soundproofing process is a process for on-floor piping, that is, a part above the first floor. Since the underfloor piping is often buried underground, noise from the underfloor was not considered a problem.

Further, since the noise of water supply and drainage inside the ceiling and in the pipe space has been greatly reduced, almost no complaints have been made regarding soundproofing measures for underfloor piping.

[0005]

On the other hand, in recent years, the "Law Concerning Promotion of Ensuring Quality of Houses" has been implemented in recent years, and maintenance of pipes has been strongly required.

[0006] The underfloor piping is buried under the floor, which makes maintenance very difficult.

Along with this, the present inventor came to secure the maintainability by providing the underfloor piping on the soil concrete which is the base.

Conventionally, pipes had a small amount of noise generated by being buried in the ground, but since untreated pipes were arranged on soil concrete, a large amount of noise was generated.

Further, since the piping work is divided into the underfloor portion, it is unavoidable to use the noise-causing offset piping due to, for example, avoiding the floor joists and cloth foundations and opening the piping holes. There are many cases, and in particular, in recent years, the noise above the floor has become quieter due to the soundproofing treatment, and the noise below the floor has become an additional problem.

An object of the present invention is not only to facilitate maintenance of underfloor piping, but also to sufficiently prevent noise from underfloor piping.

Further, from the background described above, an object of the present invention is to sufficiently prevent the noise of the underfloor piping without impairing the maintainability of the underfloor piping.

[0012]

DISCLOSURE OF THE INVENTION The present invention is a soundproof structure for underfloor piping, comprising a floor of a building, underfloor piping and a foundation, wherein the foundation is made of soil concrete, Piping is provided in the underfloor space between the soil concrete and the floor, the underfloor piping,
The floor penetrating pipe that penetrates the floor, a horizontal pipe, and an offset pipe that connects the floor penetrating pipe and the horizontal pipe to each other are provided, and the offset pipe is soundproofed by a soundproof member. The present invention relates to a soundproof structure for underfloor piping.

The inventor of the present invention made various prototypes of underfloor piping and studied them in order to improve the maintainability of the underfloor piping and to sufficiently prevent the noise generation of the underfloor piping.

In order to expose the underfloor pipe for construction,
Under the floor, apply earthen concrete, construct the underfloor piping on it, and after the floor of the building is made, make a through hole in the floor,
Therefore, the above-floor pipe and the under-floor pipe are connected.

At the site of such piping construction, the vertical pipe passing through the floor through hole may be misaligned with the horizontal pipe provided under the pre-floor, and the vertical pipe and the horizontal pipe may be connected to each other. It can be extremely difficult.

In this case, the offset pipe is inevitably used. As the offset pipe, an S socket pipe, a flexible pipe, or a combination pipe of a straight pipe and a joint pipe can be used. With these pipes, a vertical pipe and a horizontal pipe that are in a positional relationship that causes misalignment can be used without any problem. Can be connected.

However, according to the study by the present inventor,
We have found that such offset piping results in a significant increase in noise from underfloor piping.

When the offset pipe is used, the noise of water supply and drainage in the underfloor space increases remarkably, and the noise of the living room on the first floor remarkably increases. This phenomenon was completely unobservable at the time of underground piping.

According to the research conducted by the inventor of the present invention, the phenomenon of such noise increase is caused by the fact that the non-noiseproof offset pipe is exposed in the underfloor space and the height of the drainage drop under the floor is high. Do you get it.

The high drop height of the drainage under the floor increases the impact force of the solid matter particularly in the wastewater containing solid matter such as sewage and the impact force applied to the pipe wall of the offset pipe.

Based on such knowledge, the present inventor examined various soundproofing treatments in order to sufficiently reduce underfloor noise while maintaining maintainability such as maintenance and management of underfloor piping.

As a result, the inventor of the present invention found that a soundproof structure for underfloor piping sufficient for maintainability and noise prevention can be obtained by treating the underfloor offset piping with a predetermined soundproof member, and arrived at the present invention. It was

In the present invention, the underfloor piping is provided in the underfloor space. This facilitates maintenance of the underfloor piping.

Further, in the present invention, the offset piping of the underfloor piping is subjected to soundproofing by a predetermined soundproofing member. Thereby, the noise from the offset pipe of the underfloor pipe can be significantly reduced.

According to the soundproof structure for underfloor piping of the present invention,
Since the underfloor piping is provided in the underfloor space, the maintenance of the underfloor piping is easy, and the offset piping of the underfloor piping is soundproofed by a predetermined soundproofing member, so the ease of maintenance of the underfloor piping is not impaired. , Can exhibit sufficient soundproofing performance.

The present invention is also a soundproof structure for underfloor piping, comprising a floor of a building, underfloor piping and a foundation, wherein the foundation is made of earthen concrete, and the underfloor piping is It is provided in the underfloor space between the lower surface of the floor or the soil concrete and the floor, the underfloor piping is a floor through pipe penetrating the floor, and a horizontal draw pipe,
The present invention relates to a soundproof structure for underfloor piping, comprising: a joint pipe that connects the floor penetration pipe and the horizontal pipe, and the joint pipe is soundproofed by a soundproof member.

The present inventor further made various types of soundproof structures as prototypes and studied them in order to sufficiently prevent noise generation in the underfloor piping.

As described above, in order to expose the underfloor pipe for construction, an offset pipe may be unavoidably used in connecting the vertical pipe and the horizontal draw pipe. However, without using the offset pipe, the vertical pipe may be used. It has been found that it is also possible to connect the pipe and the horizontal draw pipe with a joint pipe such as a 90 ° elbow.

However, according to the study by the present inventors, it has been found that such joint piping brings about a significant increase in noise from the underfloor piping, like the offset piping. When the joint pipe is used, the water supply and drainage and noise in the underfloor space increase remarkably, and the noise in the living room on the first floor remarkably increases.

In the present invention, the joint pipe means a pipe composed of a joint pipe or a straight pipe, and may include a pipe which may include an offset pipe.

According to the research conducted by the present inventor, the phenomenon of such noise increase is inevitable because the flow path is changed continuously over a short distance because the joint pipe of the non-noiseproof treatment is exposed in the underfloor space. The number of collisions with joint pipes increases and the sound is superimposed, and the drop height of drainage under the floor is inevitably high.In addition, the support and fixing of the pipes are often insufficient, and the sound increases due to resonance. It was also found to be due to the occurrence of.

Based on such knowledge, the present inventor has further studied various soundproofing treatments in order to sufficiently reduce the underfloor piping noise while maintaining the maintainability of the underfloor piping.

As a result, the present inventor found out that a soundproof structure for underfloor piping sufficient for maintainability and noise prevention can be obtained by treating the underfloor joint piping with a predetermined soundproof member.

Among others, the present inventor has found that a soundproof member made of a viscoplastic material is lighter in weight than a viscoelastic material and exhibits the same soundproofing performance, and has arrived at the present invention.

The viscoplastic body is a viscous body in the plastic region,
It was judged that it could not be used due to its long-term stability, transfer of softening agent to adherend, etc.

However, according to the study by the present inventor, surprisingly, the migration of the softening agent of the viscoplastic body is prevented by an appropriate means, and the viscoplastic body is used alone as a joint pipe, an offset pipe or a pipe in the vicinity thereof. It was found that excellent soundproofing performance and weight saving can be achieved by using it for the treatment.

When using a viscoelastic body, an areal density of 35 kg /
It was necessary to use it with m ² or more, but with viscoplastic material it is 25 kg
It was found that the same result was obtained when the value was / m ² or more and the weight could be reduced by about 30%.

By using a sound absorbing material and a sound insulating material in combination with the viscoplastic material, the surface density of the viscoplastic material can be reduced to about 16 kg / m ² , and the sound absorbing material can be thinned to a thickness of 5 mm.
The surface density of the sound insulating material at this time is about 3.4 kg / m ² .

This is because the minimum condition of the conventional combination of the sound absorbing material and the sound insulating material is that the thickness of the sound absorbing material is 10 mm, so that the sound absorbing material of half the thickness is sufficient, and the surface density of the sound insulating material is 1.2 kg /
Since it is m ² , conversely, about 3 times the surface density is required, but it is possible to reduce the overall weight and thickness, improve the workability in obtaining almost the same soundproof performance, and significantly improve the cost. become.

According to the soundproof structure for underfloor piping of the present invention,
Since the underfloor piping is provided in the underfloor space, the maintenance of the underfloor piping is easy, and the joint piping of the underfloor piping is soundproofed with a predetermined soundproofing member, so the ease of maintenance of the underfloor piping is not impaired. , Can exhibit sufficient soundproofing performance.

[0041]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. (1) Building In the present invention, the building is not particularly limited and includes various types.

(2) Floor of Building The floor of the building is not particularly limited and includes various floors. The floor acts as a boundary that separates the space above the floor from the space below the floor.

(3) Underfloor Piping The underfloor piping according to the present invention includes a floor penetration pipe, an offset pipe, a joint pipe, a horizontal pipe, and the like. Such underfloor piping is arranged in the lower surface of the floor or in the underfloor space between the floor and the base. The underfloor pipe is not particularly limited, and various materials and shapes can be used.

(4) Base The base is a base that supports a building. The base is not particularly limited and may be various ones. Such a base is formed from earthen concrete.

If necessary, a moisture-proof sheet or the like can be laid on the soil concrete to prevent moisture and deterioration.

The underfloor piping is preferably fixed with earth concrete. If you use a bed supporting the floor to support and fix the underfloor piping, the vibration of the underfloor piping propagates to the floor,
It is better to avoid the sound that propagates from the floor.

(5) Floor penetrating pipe The floor penetrating pipe is a pipe which is connected to the on-floor pipe and penetrates the floor of the building. It is preferable that such a floor penetration pipe is treated with an appropriate soundproof material, a waterproof sheet, a brim-shaped rubber or the like, if necessary.

Between the floor and the penetrating portion of the floor penetrating pipe, a cushioning material made of a brim-shaped rubber or the like is provided so that the piping does not directly contact the floor and no gap is formed, and elastic support is provided to generate noise. Is preferably prevented.

(6) Horizontal draw pipe The horizontal draw pipe is a pipe for lateral flow of effluents from the floor and effluents to the floor on the soil concrete. Such a horizontal pipe is preferably treated with an appropriate soundproof material, waterproof sheet, moisture-proof sheet, or the like.

(7) Offset Pipe Offset pipe is a pipe for correcting the positional deviation between the floor penetration pipe and the joint pipe at the end of the horizontal pipe under the floor and for smoothly connecting these pipes.

As the offset pipe, an S socket pipe,
At least one pipe selected from the group consisting of a flexible pipe and a combination pipe formed of a straight pipe and a joint pipe can be used.

As the joint pipe, at least one selected from the group consisting of S socket pipe, 45 ° elbow, 90 ° elbow and 90 ° large bend elbow can be used.

In the combination example of such offset pipes, 4
A 5 ° elbow or 90 ° elbow, one at each end, is connected with a short straight pipe to fix the misalignment between the floor penetration pipe and the horizontal pipe or vertical pipe, and the floor penetration pipe. It is possible to use a means for connecting the tube to the laterally drawn tube by connecting it to the 90 ° elbow with an S socket tube or a flexible tube.

(8) Soundproofing Member The soundproofing member according to the present invention is for soundproofing the joint pipe and the offset pipe. The soundproof member is not particularly limited, and various soundproofing materials, soundproofing means and the like can be used alone or in combination.

(8-1) Soundproof Material In the present invention, as the soundproof material, at least one soundproof material selected from the group consisting of a vibration damping material, a vibration damping material, a dynamic vibration absorbing material, a sound absorbing material and a sound insulating material is used. be able to.

Preferably, in the present invention, as the soundproof material,
It is advantageous to roughly use two types. Part 1
One is to use at least an offset pipe or a joint pipe with a soundproof member in which a sound absorbing material having a thickness of 10 mm or more and a sound insulating material having an area density of 1.2 kg / m ² or more are combined.

The remaining one is to surround at least the offset pipe or the joint pipe with a viscoelastic body having a surface density of 35 kg / m ² or more, or to surround a viscoplastic body having a surface density of 25 kg / m ² or more.

These two soundproofing materials are suitable for soundproofing a relatively large noise source such as an underfloor offset pipe or a joint underneath.

It is preferable to use such a soundproofing material not only as an offset pipe but also as a soundproofing treatment for a joint such as a 90 ° elbow that changes the flow path to a horizontal pipe in the downflow direction.

Further, by using both of these two soundproofing materials together, it is possible to reduce the surface density of the viscoelastic body or viscoplastic body and to reduce the thickness of the sound absorbing material, and to obtain the same sound performance. By reducing the weight and thickness while obtaining it, it is effective for workability and cost reduction.

(8-1-1) Soundproof Material Composed of Sound Absorbing Material and Sound Insulating Material Such soundproofing material has a surface density of 1.
A sound insulating material of ² kg / m ² or more is an essential constituent material, and its function is to absorb sound by a sound absorbing material of 10 mm or more and have an areal density of 1.
Sound insulation will be performed with a sound insulation material of ² kg / m ² or more.

At this time, when the pipe is directly surrounded by the outer circumference, it acts not only as a sound absorbing material but also as a vibration damping material, and the sound insulating material surrounded by the outer circumference acts as a restraining material.

At this time, the generally known restraint type damping material needs to be sufficiently adhesively bonded to the material to be damped, and the restraining material should be sufficiently adhesively bonded. The condition of a constrained vibration damping material composed of materials is that the sound absorbing material does not necessarily have to be adhesively bonded to the vibration damping material or the restraining material, and the sound absorbing material does not adhere to the damping material or the restraining material. If so, the damping effect will occur.

At this time, as for the damping effect, it is possible to obtain a higher damping effect by strongly pressing the damping material, but the sound absorbing effect is deteriorated. Therefore, better results are obtained when the sound absorbing material is compressed slightly.

(8-1-1-1) Sound Absorbing Material There are 10 sound absorbing materials used as a soundproof material composed of a sound absorbing material and a sound insulating material.
It is necessary to have a thickness of mm or more, and if the thickness is less than 10 mm, it is not sufficient for middle and low frequencies. More preferably, the thickness is 12 to 20 mm.

Specific examples of the sound absorbing material include fibrous materials such as felt, non-woven fabric, glass wool, rock wool, and paper-like materials, rubber and polymer foams, molded sheets of rubber and polymer crushed products thereof, rubber, and the like. Examples thereof include a polymer foam or a mixture of pulverized products thereof and a solid pulverized product of rubber and polymer, or a sheet obtained by molding them with a binder or the like.

More specifically, in the case of a fibrous sound absorbing material, a means for making permanent distortion less likely to be caused by pressing and having a restoring property for a long period of time is necessary in order to keep the vibration damping property of the sound absorbing material. The same applies to the foam, and it is desirable that the foam has good restorability.

As a means for this, in the case of a fiber type sound absorbing material,
Although it is conceivable to make the fiber diameter thicker, since the sound absorbing property is deteriorated, the fiber diameter of 1 to 5 denier is 60 to 80
It is good to use it in the ratio of%.

In addition, as a means for improving the resilience,
Measures such as mixing hollow fibers to increase the resilience of the fibers themselves, bonding fibers with a binder or low-melting fibers, mixing long fibers, and increasing the entanglement between fibers by needle punching may be used together. .

When such a sound absorbing material is sandwiched between a plurality of sound absorbing materials, the sound absorbing property is increased. In order to bring about this action, the sound absorbing material may be in the relationship of fiber to fiber, foam to fiber, or foam to foam.

Depending on the material and thickness of the sound absorbing material and the material and thickness of the film, the effective frequency band changes, and the tendency cannot be determined uniformly. Therefore, the sound absorbing coefficient is actually measured and the actual water supply / drainage is performed. It is necessary to perform soundproofing on the pipes and confirm by sound measurement.

A rubber and polymer foam or a mixture of a crushed product of them and a solid crushed product of rubber and a polymer, which is shown as a specific example of the sound absorbing material, or a sheet obtained by molding them with a binder or the like reduces the middle and low frequency bands. It is effective in doing this.

(8-1-1-2) Sound Insulation Material Next, as a sound insulation material used for a sound insulation material composed of a sound absorbing material and a sound insulation material, rubber, polymer, general-purpose filler, high specific gravity filler, etc. are uniformly used. Mixed sheet, inorganic board such as gypsum board,
Examples include particle boards, wood boards such as plywood, polymer boards such as vinyl chloride boards, metal foils and metal boards.

With such a sound insulating material, the surface density is 1.2 kg /
m ² or more is required, more preferably 1.5 to 5 kg
/ M ² . If it is less than 1.2 kg / m ² , sufficient sound insulation effect cannot be obtained.

In the present invention, the soundproof material is preferably a flexible material. This is because the piping can be easily enclosed.

Alternatively, in the present invention, the soundproof material may be adhered to an appropriate carrier and provided as a box-shaped soundproof member or a tubular soundproof member around the target pipe.

The box-shaped soundproof member or the tubular soundproof member is
It suffices to use a plate material as a carrier, wood or the like may be used as a frame, and if it can be divided into several pieces in terms of ease of attachment, workability is also improved.

(8-1-2) Viscoelastic body Preferably, in the present invention, the soundproof material has an areal density of 20 kg /
A viscoelastic body having an areal density of m ² or more, and more preferably 35 to 50 kg / m ² is an essential constituent material.

The viscoelastic body referred to in the present invention is a general term for substances having both viscosity and elasticity that are used in a range not exceeding the yield point on the stress-strain curve. When the viscoelastic body is used alone in the present invention, the areal density is preferably set to 35 to 50 kg / m ² .

In the case of such a viscoelastic body, it is most effective to attach it directly to the pipe. In this case, if the viscoelastic body alone is used to satisfy the sound performance, a sufficient effect cannot be obtained when the surface density of the viscoelastic body is less than 35 kg / m ² .

That is, in the present invention, 31.5 Hz or 63
A countermeasure was taken from the viewpoint that it is also necessary to reduce low-frequency sound of Hz, but in order to obtain a sufficient effect at low frequencies, a surface density of 35 kg / m ² or more was required when a viscoelastic body was used as a countermeasure. .

Further, it is necessary to firmly support and fix the vicinity of the joint pipe and the offset pipe to suppress the vibration of the pipe system as much as possible. By doing so, resonance at a frequency centered on 125 Hz can be prevented.

In this case, the two functions of the non-restraint type vibration damping action and the sound insulation of the offset pipe and the joint pipe are used together. In this case, since a plurality of sound sources and vibration sources are continuously present within a short distance, it is necessary to process the viscoelastic body to be considerably heavy.

As a concrete example of the viscoelastic body, a large amount of a softening agent or a tackifier is mixed with rubber or polymer to give viscosity and elasticity, and a high specific gravity filler or a general-purpose filler is uniformly added. It is a mixture.

When the viscoelastic body is used in combination with a restraint material such as a film, a foil, a non-woven fabric, a woven cloth, a paper or a sheet, the restraint type vibration damping action can be utilized and the weight can be further reduced.

Further, by using a combination of the viscoelastic body and the above-mentioned sound absorbing material and sound insulating material, the surface density can be reduced more than that of the viscoelastic body alone, and the sound absorbing material when the sound absorbing property and the sound insulating material are combined. The thickness can be greatly reduced and workability is also improved.

The above are the essential constituent materials, and it is possible to further improve the soundproofing performance by combining other kinds of constituent materials with the essential constituent materials.

(8-1-3) Viscoplastic Material The viscoplastic material referred to in the present invention is a process in which an object is deformed by applying stress, and when the stress is gradually increased, a slight increase in the stress, or It is a general term for objects that reach a yield point where the strain starts to increase rapidly without any increase, but the stress at this yield point is very small, for example, an object with almost no restoring force such as clay.

Examples of such viscoplastic materials include clay and rubber clay. For example, in rubber clay, a small amount of rubber is uniformly mixed with a large amount of a softening agent and a filler, Conventionally, it has not been used as a soundproof material because it has no restorative property and has problems such as migration of a softening agent to a contacted object and destabilization of physical properties of a viscoplastic body due to migration of a softening agent.

However, it showed good results with respect to soundproofing and antivibration, and in consideration of its long-term stability itself, stability was achieved by eliminating prevention of migration of the softening agent to the adherend and the like. Maintains physical properties and eliminates migration of softener to adherends,
We have obtained the knowledge that it exhibits sufficient performance as a soundproofing material.

Since the viscoplastic body is obtained by uniformly mixing a large amount of filler and a softening agent using a small amount of rubber or polymer as a binder, it has a high specific gravity, is suitable as a sound insulation material, and has a high rigidity. Since there is no coincidence effect, there is no frequency at which the performance deteriorates on the high frequency side. Further, the viscoplastic body is highly effective as a vibration damping material in a portion that can be used with almost no load applied. It can be obtained at a low cost in comparison with the effect on the sound vibration.

In the present invention, the viscoplastic material can be improved in long-term stability while maintaining a high soundproofing effect by increasing the amount of the high molecular weight component of the softening agent and reducing the amount of low molecular weight substances. .

Further, in the present invention, from the viewpoint of preventing the migration of the softening agent of the viscoplastic body to the contact substance, it is selected from the group consisting of viscoplastic bodies, films, foils, non-woven fabrics, woven fabrics, papers and sheets. It is preferable to use a soundproofing member that is used in combination with a softener migration preventing material made of at least one kind of material.

If measures such as contacting the viscoplastic body with an object to be contacted through the softener migration preventing material are used, the softener component in the viscoplastic body is covered by the softening agent migration preventing material such as the film. Since the transfer to the contact substance is prevented, the composition change of the viscoplastic body is suppressed, and the long-term stability of the viscoplastic body is obtained. If a pressure-sensitive adhesive layer or the like is provided on the contact surface side of the film, it can be easily attached as a soundproof member. Further, the softening agent migration preventing material such as the film can also function as an ordinary restraining material.

On the other hand, by uniformly mixing the rubber powder in the viscoplastic body, it is possible to prevent unexpected deterioration of vibration damping property and sound insulation property due to partial plastic deformation under unexpected stress. You can That is, at least the thickness corresponding to the particle diameter of the rubber powder can be secured.

In the present invention, compared with the viscoelastic body,
Surprisingly, when the viscoplastic body is used alone for offset piping and joint piping, the surface density of the viscoelastic body is 35 kg /
Despite m ² was required, the viscoplastic material well surface density for the same degree of sound performance at 25 kg / m ^2, about 30
% Weight reduction is possible.

The reason is that the viscoelastic body has a high area density and is used within the elastic limit, so that the ratio of the filler to the polymer, the softening agent and the tackifying resin is high, and the viscoelastic body becomes relatively harder than viscoplasticity and has a viscous property. It is thought that the reason is that the plastic body is softer, and has a proper flexibility to suppress the vibration of the pipe, and because it has plasticity, it is difficult to transmit the vibration in the viscoplastic body as compared with the viscoelasticity. . However, a clear theory has not yet been established.

Further, like the viscoelastic body, the viscoplastic body can be made lighter in weight and thinner by combining the sound absorbing material and the sound insulating material. It becomes a soundproof member.

That is, reduction of low frequency by viscoplastic material,
High frequency reduction by sound absorbing material and sound insulating material can be used together. As for the countermeasure frequency, low frequencies are basically reduced by using a viscoplastic or viscoelastic body with a high areal density, and a combination of a sound absorbing material and a sound insulating material is suitable for medium and high frequencies, so use it together. As a result, a positive factor for the soundproofing performance due to sound absorption and sound insulation and a positive factor for the soundproofing performance also occur in the middle and high frequency ranges due to the vibration damping and sound insulating properties of the viscoplastic body.

In the present invention, the soundproof member as described above can be used, and as a result, the MAX level of the F characteristic high pressure level of the upper floor toilet supply / drainage noise in the living room on the floor penetration portion.
Value is 1/1 octave band center frequency is 31.5Hz
68 dB or less at, 55 dB or less at 63 Hz, 1
45 dB or less at 25 Hz, 37 d at 250 Hz
B or less, 32 dB or less at 500 Hz, 1 kHz to 4
The value of 30 dB or less at the frequency of 2 at each frequency
It is possible to satisfy the empirical rule that there is almost no complaint from the user when satisfying including the dB allowance.

At this time, the reason why the audible range limit frequency of 31.5 Hz is added to the condition is in consideration of the user who is particularly sensitive to the low range. In particular, during offset piping, the focus is not on the evaluation at the equivalent noise level, but on the maximum value, from the viewpoint that low-frequency noise due to pipe vibration is large and variations easily occur.

In general, the sound due to the impact tends to be low-frequency sound, and in particular, with a heavy and soft impact source such as a heavy floor impact sound, a sound outside the audible range is also felt.
It feels quieter when the z band is reduced.

Regarding the water supply / drainage noise, since the impact force is much smaller than that of the heavy floor impact, it is not necessary to take measures up to the 16 Hz band, but the 31.5 Hz band clearly has a significant audible difference. is necessary.

(8-2) Storing Soundproof Member In the present invention, preferably, for soundproofing treatment, a soundproofing means such as a soundproofing member such as a box-shaped soundproof member or a tubular soundproof member is used alone or as described above. It can be used in combination with each soundproofing member.

Such a housed soundproofing member is a soundproofing member capable of housing offset pipes and joint pipes therein. The box-shaped soundproof member is formed of a soundproof material in a box shape, and the tubular soundproof member is formed of a soundproof material in a tubular shape.

In such a housed soundproofing member, a space is provided between the offset pipe or joint pipe and the housed soundproofing member, and the soundproofing performance can be enhanced by the space.

(8-2-1) Box-shaped soundproof member The box-shaped soundproof member can be formed as a soundproof box having one surface thereof being the surface of soil concrete. Such a soundproof box can be composed of a plate-shaped frame and a soundproof material inside thereof.

Since the soundproof box is fixed on the soil concrete, the offset pipe and the joint pipe can be soundproofed in the space surrounded by the soil concrete and the soundproof material.

When the box-shaped soundproofing member according to the present invention, particularly the soundproofing box is formed on the soil concrete, viscoelasticity such as rubber is used so that the frame of the soundproofing box and the soil concrete do not generate rattling noise due to pipe vibration. Body, rubber,
It is desirable to interpose a vibration insulating material such as polymer foam or fibrous material between the frame of the soundproof box and the soil concrete.

As the vibration insulating material, it is particularly preferable to use the viscoelasticity of a viscoelastic body or a viscoplastic body to fix the frame of the soundproof box and the concrete floor.

The box-like soundproof member according to the present invention can be provided with a hole for inserting a pipe in advance, and the pipe can be inserted into this hole to be placed on the soil concrete. In this case, the box-shaped soundproofing member can be constructed by being divided into two parts, three parts, etc. and assembled on site.

The box-like soundproof member can support and fix the underfloor pipe such as the offset pipe at the hole portion for inserting the pipe or the wall portion. By doing so, particularly when the pipes such as the offset pipes are surrounded by the soundproof box or the like, the offset pipes or the like can be fixed to the soundproof box or the like, and the noise caused by the vibration of these pipes can be suppressed. .

In the case of the soundproof box-type housed soundproof member, the target soundproof performance can be satisfied without necessarily soundproofing the offset pipe and the underfloor pipe itself such as the joint therebelow.

Particularly, drainage noise is particularly likely to be transmitted to a long distance in the pipe because the collision noise of the drainage with the pipe wall at the flow path changing portion of the pipe and the mixed noise of the drainage and air are easily transmitted to the inside of the pipe. Soundproofing is more effective in reducing noise.

(8-2-2) Tubular Soundproof Member The tubular soundproof member according to the present invention is formed in a tubular shape so as to cover the offset pipe and the joint pipe. Such a cylindrical soundproofing member, in order to insert an offset pipe or the like,
The inner diameter is larger than the outer diameter of the offset pipe or the like in advance. Further, the cylindrical soundproof member can be constructed by being divided into two parts, three parts, etc. and assembled on site.

When the tubular soundproof member is composed of split members, a joint tape can be used for the seams, a sound-insulating material for the surface layer can be machined with a woven cloth, or a fitting function having a chuck function. It is also possible to use a sound insulating material having irregularities at both ends, which can be constructed with one touch using a chuck.

The tubular soundproof material is preferably a soundproof tube which is a stretchable soundproof member. Such a soundproof cylinder can be formed by an outer peripheral sound insulation layer bent in a bellows shape and a sound absorbing material layer inside the outer peripheral sound insulation layer.

The expandable / contractible cylindrical soundproofing member can easily accommodate the offset pipe therein. In addition, such a tubular soundproof member,
Fixing to the offset pipe at both ends thereof is easy, and sound leakage is reduced in the fixing portion between the soundproof member and the offset pipe.

(9) Soundproof Structure for Underfloor Piping The soundproof structure for underfloor piping according to the present invention reduces the noise generated from the offset pipe and joint pipe immediately below the floor penetration portion, and reduces the noise from the underfloor.

The soundproof structure is used in the living room on the floor penetration,
When the MAX value of the F characteristic sound pressure level is 1/1 octave band center frequency and 31.5 Hz, 68 dB or less, 6
55 dB or less at 3 Hz, 45 dB at 125 Hz
Hereinafter, the conditions of 37 dB or less at 250 Hz, 32 dB or less at 500 Hz, and 30 dB or less at 1 kHz to 4 kHz can be satisfied with the values at each frequency including the 2 dB tolerance.

Next, the present invention will be described in more detail with reference to the drawings. In the drawings, the same reference numerals denote the same members.

FIG. 1 is a sectional view of a soundproof structure as an example of the present invention. FIG. 2 is a sectional view of another example of the soundproof structure of the present invention. FIG. 3 is a sectional view of a soundproof structure according to still another example of the present invention. FIG. 4 is a sectional view of a soundproof structure according to still another example of the present invention. FIG. 5 is a sectional view showing a soundproof structure of still another example of the present invention. FIG. 6 is a sectional view showing a soundproof structure of still another example of the present invention.

As shown in FIG. 1, a soundproof structure 1 for underfloor piping
Includes a floor 2, an underfloor pipe 3 and a base 4 of a building.

In the soundproof structure 1, the base 4 is made of soil concrete, and the underfloor pipe 3 is provided in the underfloor space between the soil concrete and the floor 2.

The underfloor pipe 3 is provided with a floor penetrating pipe 5 penetrating the floor 2, a horizontal drawing pipe 6, and an offset pipe 7 for connecting the floor penetrating pipe 5 and the horizontal drawing pipe 6 to each other. The offset pipe 7 is soundproofed by a soundproofing member 8.

FIG. 1 shows a cross-sectional situation under the floor.
The floor penetration pipe 5 is a vertical pipe, and a gap between the vertical pipe 5 and the floor penetration portion 2 a is protected by a flanged rubber 11 to prevent sound leakage.

At the same time, the floor penetrating portion 2a has a collar-shaped rubber 11
The vertical pipe 5 is vibration-isolated and supported by, and fixed at the same time.

The vertical pipe 5 includes a 45 ° elbow 7a and a straight pipe 7b.
The offset pipe 7 is connected with the 45 ° elbow 7c. It is connected to the laterally drawn pipe 6 by a 90 ° elbow 13 via a short straight pipe 12.

The vicinity of the 90 ° elbow 13 of the horizontal draw pipe 6 is supported by the soil concrete by a support band 15 via a pipe soundproof material 14.

The vertical pipe 5 and the short straight pipe 12 immediately below the offset pipe 7 are surrounded by a pipe soundproof material 16 composed of the same sound absorbing material 16a and sound insulating material 16b as on the floor.

The offset pipe 7 and the lower 90 ° elbow 13 are surrounded by a soundproof member 8 composed of a sound absorbing material 8a and a sound insulating material 8b.

The members 8a, 8b, 16a, 16b of the offset pipe 6 are sealed with a joint tape 17 without any gap. In addition, the floor 2 is formed by stacking plywood 18 and flooring material 19, and is supported by joists 20.

FIG. 2 shows another example of the soundproof structure 21 of the present invention.
Is shown in a sectional view under the floor. The difference from the soundproof structure 1 of FIG. 1 is that in the underfloor pipe 23, the offset pipe 7 and the 90 ° elbow 13 below the offset pipe 7 are covered with a soundproof member 28 made of a viscoelastic body 8c.

FIG. 3 shows a soundproof structure 3 of still another example of the present invention.
No. 1 is shown in the sectional view under the floor. Underfloor piping 33
The body itself is the same as in FIGS.

Only the vertical pipe 5 passing through the floor penetrating portion 2a is surrounded by the same pipe soundproofing material 16 as that on the floor up to the front of the offset pipe 7, and the non-noise-proofing pipe from the offset pipe 7 to the horizontal pipe 6 is provided. ing.

Under the floor penetrating portion 2a, the pipe from the vertical pipe 5 to the horizontal pipe 6 near the 90 ° elbow 13 was soundproofed by the soundproof box 38. The bottom of the soundproof box 38 is the surface of the soil concrete 4, and these pipes are surrounded by the soundproof box and the soil concrete.

At the contact portion between the soil concrete 4 and the soundproof box 38, the rubber foam 41 and the viscoelastic body 42 prevent vibration rattling noise, and the soundproof box 38 is fixed to the soil concrete 4 by the skeleton 43. ing. Further, a rubber foam 44 is interposed at the contact portion between the soundproof box 38 and the pipe.

The soundproof box 38 uses a urethane foam having a thickness of 20 mm as the sound absorbing material 8a, a thickness of 12 mm, and an areal density of 9.6 kg /
the particle board of m ² as sound insulation material 8b, soundproof box 3
8 is provided on the entire inner surface.

FIG. 4 shows a soundproof structure 5 of still another example of the present invention.
No. 1 is shown in the sectional view under the floor. Underfloor piping 53
Then, the offset pipe 7 and the 90 ° elbow 13 below it
A viscoelastic body 8c made of a non-vulcanized butyl rubber sheet having an areal density of 5.1 kg / m ² is surrounded by the above, and these pipes are surrounded by the same soundproof box 38 and soil concrete 4 as in FIG.

FIG. 5 shows a soundproof structure 6 according to still another example of the present invention.
It is a figure which shows 1 in the cross-sectional condition under the floor. In the underfloor pipe 63, the offset pipe 7 is housed in the soundproof cylinder 68.

The soundproof cylinder 68 is composed of the sound absorbing material 8 made of a sound absorbing material layer.
The offset pipe 7 is housed inside the soundproof cylinder 68, which includes a sound insulating material 8b composed of an outer peripheral sound insulation layer bent in a bellows shape outside the sound absorbing material layer.

The sound absorbing material layer can be a liquid rubber foam, and the sound insulating material layer can be a bellows rubber. At this time, the thinnest bellows rubber has a thickness of 2 mm or more, a specific gravity of 1.5 and an areal density of 3 kg / m ² , and a sound absorption that secures a thickness of 20 mm at the thinnest portion on the inner circumference of the bellows rubber. It can be a material.

90 ° elbow 1 at the bottom of the offset pipe 7
3 is surrounded by a viscoelastic body 8c having an areal density of 35.1 kg / m ² . In addition, in the soundproof structure 61 of FIG.
It is possible to superimpose the end portion of the vertical pipe 5 on the end portion of the vertical pipe 5 and the short straight pipe 12 and fix them by using the fixing band 71. In addition, a space 72 is provided between the soundproof cylinder 68 and the offset pipe 7.
Can be formed.

FIG. 6 shows a soundproof structure 8 according to still another example of the present invention.
It is a figure which shows 1 in the cross-sectional condition under the floor. With the underfloor piping 83 under the floor penetration portion 2a, up to the 90 ° elbow 13 under the offset piping 7 can be treated with the same sound absorbing material 16a and sound insulating material 16b as the pipe soundproof material 16 on the floor 2.

The present invention will be described in more detail with reference to the drawings. In the drawings, the same reference numerals indicate the same members.

FIG. 7 is a sectional view of a soundproof structure according to still another example of the present invention. FIG. 8 is a sectional view of a soundproof structure according to still another example of the present invention. FIG. 9 is a sectional view of a soundproof structure according to still another example of the present invention. FIG. 10 is a sectional view of a soundproof structure according to still another example of the present invention. FIG. 11 is a sectional view of a soundproof structure according to still another example of the present invention.

As shown in FIG. 7, a soundproof structure 1 for underfloor piping
Reference numeral 01 includes a floor 2 of a building, an underfloor pipe 103, and a base 4.

In the soundproof structure 101, the base 4 is made of soil concrete, and the underfloor piping 103 is provided in the underfloor space between the soil concrete and the floor 2.

The underfloor piping 103 is a joint piping (for example, an offset piping 7 as shown in the drawing) which connects the floor penetrating pipe 5 penetrating the floor 2 with the horizontal pipe 6 and the floor penetrating pipe 5 with the horizontal pipe 6. ) And. The offset pipe 7 is soundproofed by a soundproofing member 108.

FIG. 7 shows the condition of the cross section of the pipe under the floor. The floor penetration pipe 5 is composed of a vertical pipe, and the vertical pipe 5 and the floor penetration portion 2
The gap between a and the flange is covered with a flanged rubber 11 to prevent sound leakage.

At the same time, the floor penetrating portion 2a has a collar-shaped rubber 11a.
The vertical pipe 5 is supported by the vibration proof and fixed at the same time.

The vertical pipe 5 includes a 45 ° elbow 7a and a straight pipe 7b.
The offset pipe 7 is connected to the 45 ° elbow 7a. It is connected to the horizontal pipe 6 by a 90 ° elbow 13 via a short straight pipe 12. 90 of horizontal pipe 6
The vicinity of the elbow 13 is supported by the earth concrete by the support band 15 via the pipe soundproofing material 14.

The vertical pipe 5 is surrounded by a pipe sound insulating material 16 which is composed of the same sound absorbing material 16a and sound insulating material 16b as on the floor. The offset pipe 7, the short straight pipe 12 immediately below the offset pipe 7, and the 90 ° elbow 13 below the offset pipe 7 are surrounded by a soundproof member 108 made of a viscoplastic body 8d. A joint tape 17 seals between the members 7a, 7b, 16, 12, 13 of the offset pipe 7 without any gap. Also, floor 2
The plywood 18 and the flooring material 19 are stacked on each other, and are supported by joists 20.

FIG. 8 shows a soundproof structure 1 according to still another example of the present invention.
11 is a sectional view under the floor. Unlike the soundproof structure of FIG. 7, in the underfloor pipe 113, the offset pipe 7, the short straight pipe 12 immediately therebelow, and the 90 ° elbow 13 below the offset pipe 7 are located at the viscoplastic body 8e, the sound absorbing material 8a on the outside thereof, and the sound absorbing material 8a on the outside thereof. The viscoplastic body 8e is covered with a soundproof member 118 including the sound insulating material 8b, and has a small surface density.

FIG. 9 shows a soundproof structure 12 of still another example of the present invention.
No. 1 is shown in the sectional view under the floor. Underfloor piping 12
The main body of 3 is the same as the viscoplastic body 8e shown in FIG.

Only the vertical pipe 5 passing through the floor penetrating portion 2a is surrounded by the same pipe soundproof material 16 as that on the floor up to the front of the offset pipe 7, and the offset pipe 7 and the short straight pipe 12 immediately below it.
And the 90 ° elbow below it is soundproofed only by the viscoplastic body 8e.

Under the floor penetrating portion 2a, the pipe from the vertical pipe 5 to the horizontal pipe 6 near the 90 ° elbow 13 was soundproofed by the soundproof box 38. In addition, the bottom of the soundproof box 38 is the soil concrete 4
And the pipes 7, 12 and 13 on the surface of the soundproof box 38
And soil concrete 4.

At the contact portion between the soil concrete 4 and the soundproof box 38, the rubber foam 41 and the viscoelastic body 42 prevent vibration rattling noise, and at the contact portion between the soundproof box 38 and the pipe, a rubber foam 44 is provided. Intervene. Soundproof box 38 is 20 mm
The thick urethane foam is used as the sound absorbing material 8a, and the particle board having a 12 mm thick surface density of 9.6 kg / m ² is used as the sound insulating material 8b.

FIG. 10 shows a soundproof structure 131 of still another example of the present invention in a sectional view under the floor. In the underfloor pipe 133, the offset pipe 7 and the short straight pipe 1 immediately below the offset pipe 7
2 and the 90 ° elbow 13 below it, with an areal density of 14 kg /
and囲着viscoplastic body 8e of m ^2, these pipes are stacked sound-absorbing material 138a and sound insulator 138b, the chuck 138c
It is surrounded by a tubular soundproof material 138 which is formed into a tubular shape.

FIG. 11 shows a soundproof structure 141 according to still another example of the present invention in a sectional view under the floor. In the underfloor pipe 143, a brim-shaped rubber 11 is provided on the floor penetration portion, and a pipe soundproof material 16 is provided on the outer periphery of the vertical pipe 5 so as to be supported and fixed to the floor penetration portion.

Below the vertical pipe 5, a viscoplastic body 8d is enclosed on the outer periphery of the 90 ° elbow 13, and a sound absorbing material 156 is further provided on the outer periphery thereof.
The sound insulating material 156b is surrounded by a, and the joint tape 17 seals the gap between the members. 90 ° elbow 13
Is connected to the horizontal draw pipe 6, and the horizontal draw pipe is untreated.
In the vicinity of the 90 ° elbow of the horizontal drawing pipe 6, a supporting band 15 is supported and fixed to the soil concrete 4 through a pipe soundproof material 14.

[0162]

The present invention will now be described in more detail based on Examples and Comparative Examples with reference to the drawings. In Examples and Comparative Examples, the following common piping structure was adopted as the basic structure for piping construction.

Common Piping Structure From the toilet on the second floor to the ceiling on the first floor, the flow path was changed by 90 ° elbow three times. Drained under the floor with a vertical pipe. The vertical pipe is used under the floor penetration part to compensate for pipe misalignment of a length of twice the pipe diameter by using an offset pipe consisting of a 45 ° elbow, a straight pipe and a 45 ° elbow, and the offset pipe is used to pass through the straight pipe. 90 °
The pipe was assembled so that it could be connected to the horizontal pipe through the elbow. The ceiling and the pipe space are gypsum board 12.
It was surrounded by 5 mm.

In the piping on the floor, a straight pipe was surrounded by a non-vulcanized butyl rubber sheet of 5 mm thickness and a non-vulcanized butyl rubber sheet of 2 mm thickness, and all three elbows were made of viscoelastic body of 2 mm thickness, non-woven fabric of 5 mm thickness and non-vulcanized butyl rubber sheet of 2 mm thickness. The joints between the respective members were surrounded with a joint tape made of non-vulcanized butyl rubber with a thickness of 1 mm without any gap.

Example 1 A soundproof structure for underfloor piping as shown in FIG. 1 was constructed. With respect to the above-mentioned common piping structure, a vertical pipe was supported and fixed to the floor penetrating portion of the underfloor piping with a brim-shaped rubber. The lower vertical pipe is surrounded by a non-vulcanized butyl rubber sheet having a thickness of 5 mm and the non-vulcanized butyl rubber sheet having the same thickness as the straight pipe on the floor, and the offset pipe portion is surrounded by a non-woven fabric having a thickness of 12 mm and an areal density of 1.5 kg / m ² . Non-vulcanized non-vulcanized butyl rubber sheet with a thickness of 5 mm
mm thickness, and the 90 ° elbow underneath is surrounded by nonwoven fabric 12
It was surrounded by an olefin sheet having a thickness of mm and an areal density of 1.5 kg / m ² . The horizontal tube was untreated.

The underfloor piping is fixedly supported by 90 ° of the horizontal pipe which is laterally drawn from the floor penetrating portion and the 90 ° elbow under the floor penetrating portion.
A non-vulcanized butyl rubber sheet having a width of 3 cm and a non-vulcanized butyl rubber sheet having a thickness of 3 mm and a width of 3 cm at a position of 10 cm from the elbow were surrounded, fixed with a support band, and supported by soil concrete.

Example 2 A soundproof structure as shown in FIG. 2 was constructed. In the soundproofing treatment of the underfloor pipe of Example 1, the offset pipe portion and the 9
Only 0 ° elbow is removed, specific gravity 2.7, sheet thickness 13
A viscoelastic body having a size of 3 mm (area density: 35.1 kg / m ² ) was enclosed and tested.

Example 3 A soundproof structure as shown in FIG. 3 was constructed. In the second embodiment, only the flanged rubber at the floor-penetrating portion and the pipe sound insulating material of the vertical pipe therebelow are left, other pipe sound insulating materials are removed, and 12 mm thick areal density is 0.6 kg / m for a 5 cm square timber frame. I made a soundproof box that can be divided into two parts without a bottom plate with ² particle boards, attached a 20 mm thick urethane foam to the entire inner surface of the particle board, and covered the sound insulation box from the vertical pipe through the floor to the supporting and fixing part of the horizontal draw pipe. .

The portion in contact with the vertical pipe and the horizontal pipe is fixed with a rubber foam without any gaps. The rubber foam with a viscoelastic body is also provided over the whole portion in contact with the soil concrete, frame and particle board. The test was performed by fixing the soil concrete.

Example 4 A soundproof structure as shown in FIG. 4 was constructed. A non-vulcanized butyl rubber sheet having a specific gravity of 1.7 and a sheet thickness of 3 mm (area density of 5.1 kg / m ² ) was surrounded by the offset pipe of Example 3 and a 90 ° elbow below the same, and the same soundproof box as in Example 3 was used. It was measured as it was.

Example 5 A soundproof structure as shown in FIG. 5 was constructed. Rubber with straight tube fixing parts at both ends and a bellows-shaped central part (the thinnest part has a thickness of 2 mm or more, a specific gravity of 1.5 and an areal density of 3 kg /
In m ² or more), in the peripheral bellows portion, 20 mm at the thinnest portion
Using a rubber soundproof tube formed with a liquid rubber foam that secures the thickness of the
Elbow, specific gravity 2.7, sheet thickness 13mm (area density 3
The test was performed by enclosing a viscoelastic sheet of 5.1 kg / m ² ).

Example 6 A soundproof structure as shown in FIG. 6 was constructed. Underfloor piping under the floor penetration, up to 90 ° elbow under the offset piping, the same as the sound insulation material on the floor (sound absorption material 5 mm thick,
As a non-woven fabric, a non-vulcanized butyl rubber sheet having a surface density of 3.50 kg / m ² having a thickness of 2 mm was used as a sound-insulating material (laminated product) and treated.

Example 7 A soundproof structure for underfloor piping as shown in FIG. 7 was constructed. With respect to the above-mentioned common piping structure, the piping was supported and fixed to the floor penetrating portion of the underfloor piping with a brim-shaped rubber. The lower vertical pipe was surrounded by a non-vulcanized butyl rubber sheet of 2 mm thickness and the same non-woven fabric as the straight pipe on the floor. The offset pipe, the short straight pipe immediately below it and the 90 ° elbow were viscoplastic with an areal density of 26 kg / m ² . It was surrounded by a body, and the joint tape closed the gap between the joints of the members. The horizontal pipe was untreated.

The underfloor piping is fixedly supported by a non-vulcanized non-vulcanized non-woven fabric with a width of 3 cm at a position 310 cm from the 90 ° elbow of the horizontal pipe which is horizontally drawn from the floor penetrating portion and the 90 ° elbow under the floor penetrating portion. The butyl rubber sheet was surrounded by a 2 mm-thick sheet, fixed with a support band from above, and supported by soil concrete.

Example 8 A soundproof structure for underfloor piping as shown in FIG. 8 was constructed. The floor penetration part and the floor penetration pipe were treated in the same manner as in Example 7. The offset pipe, the short straight pipe immediately below it, and the 90 ° elbow enclose a viscoplastic body with an areal density of 14 kg / m ² , and 5
A laminate of a mm-thick non-woven fabric and an unvulcanized butyl sheet having an areal density of 3.5 kg / m ² was surrounded. The horizontal pipe was untreated.
In addition, as for the support of the horizontal pipe to the soil concrete, Example 7 was used.
Same as.

Example 9 A soundproof structure for underfloor piping as shown in FIG. 9 was constructed. As in Example 8, a viscoplastic body having an areal density of 14 kg / m ² was surrounded by an offset pipe, a short straight pipe immediately below the elbow, and an elbow below the offset pipe, and joint tape was attached to a joint between members to eliminate a gap.

Next, from the upper part of the offset pipe of the vertical pipe of the floor penetration portion to the horizontal pipe near the 90 ° elbow under the offset pipe, a soundproof box was covered. The soundproof box was produced by fixing a 12 mm-thick particle board to a 5-cm square wooden frame, making a member that can be divided into two parts without a bottom plate, and attaching a 20 mm-thick urethane sound absorbing material to the inner surface of the member, and assembling each member.

The portion where the vertical pipe and the horizontal pipe contact each other was fixed with a rubber foam without any gap. A rubber foam with a viscoelastic body was also provided over the entire area where the concrete floor, the frame and the gypsum board were in contact, and was fixed to the concrete floor with a viscoelastic body.

Example 10 An underfloor piping soundproof structure as shown in FIG. 10 was constructed. The soundproof member used in Example 9 was made into a viscoplastic body only,
Straight tube fixing parts were provided at both ends of the outer circumference, and a tubular soundproof cylinder was put over the whole and the chuck was closed. 2 cylindrical soundproof cylinders
A non-woven fabric having a thickness of 0 mm and an olefin-based sheet having an areal density of 1.5 kg / cm ² were prepared and chucked in the length direction. The horizontal pipe was untreated. The horizontal pipe was fixedly supported on the soil concrete in the same manner as in Example 7.

Example 11 A soundproof structure for underfloor piping as shown in FIG. 11 was constructed. In the underfloor structure, the through-floor portion was supported by a brim-shaped rubber to support and fix the vertical pipe and prevent gaps. The vertical pipe was surrounded by a pipe sound insulation material consisting of the same sound absorption material and sound insulation material as on the floor. A 90 ° elbow in the lower part of the vertical tube is surrounded by a viscoplastic body having an areal density of 14 kg / m ² , and further, a 5 mm thick non-woven fabric and an areal density of 3.5 kg / m are provided on the outer periphery thereof.
A stack of ^two unvulcanized butyl rubber sheets was enclosed. The horizontal draw pipe was untreated, and the horizontal draw pipe was fixedly supported on the soil concrete in the same manner as in Example 1.

Example 12 An underfloor structure 161 as shown in FIG. 12 was constructed. 12
[Fig. 3] is a cross-sectional view of an underfloor structure according to a reference example. The underfloor structure 161 is an example in which the vertical pipe 5 under the floor penetration portion is directly connected to the horizontal pipe 6 via the 90 ° elbow 13 without offset pipes. The soundproof member 168 is a pipe soundproof material 1 on the floor 2 from the vertical pipe 5 immediately below the floor penetration portion to the 90 ° elbow 13.
The same as 6 was subjected to soundproofing and tested.

Comparative Example 1 An underfloor structure as shown in FIG. 13 was constructed. It is sectional drawing of the underfloor structure concerning a comparative example. In the underfloor structure of this example, the underfloor piping under the floor penetration is a piping path which is composed of the same offset piping body as in the embodiment and is connected to the horizontal draw pipe with a 90 ° elbow. It is not soundproofed. An untreated pipe in such a state was tested.

[0183]

[Table 1]

[0184]

[Table 2]

The present invention will be described below based on the test results of Examples and Comparative Examples. In Example 1, a brim-shaped rubber was inserted into the floor penetration part to prevent vibration transmission of the vertical pipe to the floor penetration part and to eliminate gaps to prevent sound leakage. Both the offset pipe and the 90 ° elbow under the offset pipe had a thickness of 12 mm. It is surrounded by a non-woven fabric and an olefin sheet having an areal density of 1.5 kg / m ² .

As a result, the F-characteristic maximum sound pressure level in the room above the floor is greatly improved at each frequency as compared with the untreated underfloor pipe of Comparative Example 1.

In the second embodiment, a brim-shaped rubber is used for the floor penetrating portion to prevent vibration transmission of the vertical pipe to the floor penetrating portion, eliminate gaps, and prevent sound leakage. This is an example in which both elbows are provided with a viscoelastic body having an areal density of 35.1 kg / m ² .

In the low frequency range, the measured value of the F-characteristic maximum sound pressure level clears the target value, although it is better than that of the first embodiment and worse than that of the first embodiment in the high frequency range. And good results have been obtained.

In Example 3, a brim-like rubber is provided at the floor penetration portion,
As for the soundproofing of the piping itself, only the vertical pipe is surrounded by the pipe soundproofing material on the upper part of the floor, and the other parts are untreated, but the pipes from the vertical pipe to the horizontal draw pipe are surrounded by the soundproof box and earth concrete, And the horizontal tube is also fixed in the soundproof box.
In the soundproof box, a particle board having an areal density of 9.6 kg / m ² is used as a sound insulating material, and a urethane foam body having a thickness of 20 mm on the inner periphery thereof is used as a sound absorbing material.

As a result, better results than those of Examples 1 and 2 were obtained, and the target frequency values were also cleared.

Example 4 is an example in which the offset pipe of Example 3 and a 90 ° elbow are surrounded by a non-vulcanized butyl rubber sheet having an areal density of 5.1 kg / m ² . As a result, Example 3
Is even better than All the target frequency values have been cleared.

In Example 5, an offset pipe is provided with a bellows-like rubber and a liquid rubber foam on the inner circumference of the rubber. Bellows rubber has an area density of 3 kg / m even in the thinnest part
² is secured, and the liquid rubber foam is also secured with a thickness of 20 mm even in the thinnest part. 90 ° elbow has an areal density of 3
A 5.1 kg / m ² viscoelastic sheet is surrounded. As a result, both the F characteristic maximum sound pressure level and the target value at each frequency are cleared.

In Example 6, the offset pipe was sound-proofed by the same treatment as that of the pipe sound-insulating material on the floor.
Although the sound insulation performance is inferior to that of No. 5 to 5, it is more excellent in noise improvement than that of Comparative Example 1. It shows that there is still room for improvement in the same treatment as the pipe sound insulation material on the floor.

In the seventh embodiment, a brim-like rubber is inserted into the floor penetrating portion to prevent vibration transmission to the floor penetrating portion and eliminate gaps to prevent sound leakage. The offset pipe and the short straight pipe immediately below and the lower portion Area density of 26 kg / m ^{2 on} 90 ° elbow
It is a viscoplastic body surrounded by.

As a result, the F-characteristic maximum sound pressure level in the floor room is greatly improved at each frequency as compared with the non-treatment of Comparative Example 1, and the sound pressure level at which there is no complaint from the user is set at any frequency. It was satisfied, and the noise level was 35 dB (A).

In Example 8, a brim-like rubber was used for the floor penetration portion.
Prevents vibration transmission through the floor penetration, prevents sound leakage, and
Area of the 90 ° elbow under the pipe and its straight pipe
14 kg / m^TwoSurrounding the viscoplastic body of 5 mm thick non-woven fabric
Cloth and areal density 3.5kg / m^Two Enclosure of non-vulcanized butyl rubber
It is an example.

Although it is lighter than the seventh embodiment,
The sound performance can be further improved. Even for each frequency, the level without user complaints has been achieved. The noise level was also good at 34 dB (A).

In the ninth embodiment, a flanged rubber is used for the floor penetrating portion to fix and support the vertical tube, and at the same time, prevents vibration transmission and sound leakage. An offset pipe, a short straight pipe immediately below it, and a 90 ° elbow were surrounded by a viscoplastic body having an areal density of 14 kg / m ² , and the outside was treated with a soundproof box.

As a result, the frequency can be greatly improved, and each frequency can be improved to a level at which there is no complaint from the user. Moreover, the noise level is 32 dB (A), which is very quiet.

In the tenth embodiment, the vertical pipe is supported and fixed at the floor penetrating portion, vibration transmission and sound leakage are prevented, and the offset pipe, the short straight pipe immediately below the offset pipe, and the 90 ° elbow below the offset pipe are provided with an areal density. A viscoplastic body of 14 kg / m ² is surrounded, and the outer circumference of the viscoplastic body is surrounded by a cylindrical soundproof cylinder.

As a result, a sound performance which is quite close to that of the soundproof box of Example 9 was obtained. Also in this example, the sound pressure level is such that there is no complaint from the user for each frequency, and sufficient sound performance can be obtained. The noise level was also good at 33 dB (A).

In the eleventh embodiment, a brim-shaped rubber is used for the floor penetration portion, and a vertical pipe is supported and fixed to satisfy both vibration transmission prevention and sound leakage prevention. In this example, there is no offset, and the same vertical pipe that has been subjected to the pipe prevention treatment on the floor has an area density of 14 below it.
kg / m ² of viscous plastic body 90 DEG elbow 5mm thick nonwoven outer periphery thereof and the non-vulcanized butyl rubber sheet surface density 3.5 kg / m ² of the outer periphery is囲着is directly connected.

In this case, the sound is smaller than that of Examples 7 to 10 from the beginning due to the absence of the offset pipe, but any frequency can be improved to a level at which the user does not complain. The noise level is as low as 33 dB (A). This is an example that can be shared sufficiently.

In the twelfth embodiment, when there is no offset pipe, it is shown that sufficient soundproof performance can be obtained by the same treatment of the pipe soundproof material as the treatment of the upper part of the floor.

In Comparative Example 1, the underfloor piping is untreated. The F characteristic maximum sound pressure level is large for each frequency, and particularly, a large sound is generated at a high frequency. The noise level is also 58 dB (A), which is the level of sound to be subjected to soundproofing processing.

As described above, by applying the soundproofing treatment according to the present invention to the offset piping under the floor, it is possible to eliminate the difficulty of reducing the noise of the offset piping. It can be seen that the soundproofing performance of a degree or more can be obtained.

[0207]

According to the soundproof structure for underfloor piping of the present invention, since the underfloor piping is provided in the underfloor space, maintenance of the underfloor piping is facilitated, and the joint piping of the underfloor piping is soundproofed with a predetermined soundproof member. Since it is treated, sufficient soundproof performance can be exhibited without impairing the ease of maintenance of the underfloor piping.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a soundproof structure according to an example of the present invention.

FIG. 2 is a cross-sectional view of another example of the soundproof structure of the present invention.

FIG. 3 is a cross-sectional view of a soundproof structure according to still another example of the present invention.

FIG. 4 is a cross-sectional view of a soundproof structure according to still another example of the present invention.

FIG. 5 is a sectional view showing a soundproof structure of still another example of the present invention.

FIG. 6 is a cross-sectional view of a soundproof structure according to still another example of the present invention.

FIG. 7 is a sectional view of a soundproof structure according to still another example of the present invention.

FIG. 8 is a cross-sectional view of a soundproof structure according to still another example of the present invention.

FIG. 9 is a sectional view of a soundproof structure according to still another example of the present invention.

FIG. 10 is a cross-sectional view of a soundproof structure according to still another example of the present invention.

FIG. 11 is a cross-sectional view of a soundproof structure according to still another example of the present invention.

FIG. 12 is a cross-sectional view of an underfloor structure according to a reference example.

FIG. 13 is a cross-sectional view of an underfloor structure according to a comparative example.

[Explanation of symbols]

1 Sound insulation structure for underfloor piping 2 Building floor 2a Floor penetration part 3 Underfloor piping 4 foundation 5 Floor penetration tube 6 Horizontal draw tube 7 offset piping 7a 45 ° elbow 7b straight pipe 8 Soundproofing material 8a sound absorbing material 8b sound insulation 8c Viscoelastic body 8d, 8e viscoplastic body 11 Collar-shaped rubber 12 short straight pipe 13 90 ° elbow 14, 16 Piping soundproof material 15 Support band 16a sound absorbing material 16b sound insulation 17 joint tape 18 plywood 19 flooring materials 20 joist

Claims (13)

[Claims] 1. A soundproof structure for underfloor piping, comprising a floor of a building, underfloor piping, and a foundation, wherein the foundation is formed from earthen concrete, and the underfloor piping is a bottom surface of the floor or It is provided in the underfloor space between the soil concrete and the floor, and the underfloor pipe is a floor through pipe penetrating the floor, a horizontal draw pipe, the floor through pipe and the horizontal draw pipe. A soundproof structure for underfloor piping, characterized in that the soundproofing is performed by a soundproofing member. 2. The soundproof structure for underfloor piping according to claim 1, wherein the joint piping is offset piping. 3. The offset pipe is an S socket pipe,
The soundproof structure for underfloor pipes according to claim 2, wherein the pipes are flexible pipes or combination pipes formed of straight pipes and joint pipes. 4. The sound insulation structure for underfloor piping according to claim 2 or 3, wherein the sound insulation member is a box-shaped sound insulation member, and the offset pipe is housed inside the box-shaped sound insulation member. 5. The box-shaped soundproof member is fixed on the soil concrete, the bottom surface of the box-shaped soundproof member is the surface of the soil concrete, and the bottom end of the wall of the box-shaped soundproof member and the soil The sound insulation structure for underfloor piping according to claim 4, wherein a vibration insulating material is interposed between the concrete and the concrete. 6. The soundproof structure for underfloor piping according to claim 4, wherein the box-shaped soundproof member supports and fixes the underfloor piping. 7. The soundproof member is a stretchable tubular soundproof member, and the tubular soundproof member includes a bellows-shaped outer peripheral sound-insulating layer and a sound-absorbing material layer inside the outer sound-insulating layer. The soundproof structure for underfloor piping according to claim 2 or 3, wherein the offset piping is housed inside the tubular soundproofing member. 8. The sound insulation structure for underfloor piping according to claim 1, wherein a viscoplastic body is surrounded by the outer circumference of the joint piping. 9. A constraining material is surrounded by the viscoplastic body, and the constraining material is a film, a foil, a nonwoven fabric, a woven fabric,
9. The underfloor piping according to claim 8, wherein the binding material is made of at least one material selected from the group consisting of paper and sheets, and the softener component in the viscoplastic body is prevented from permeating by the restraining material. Soundproof structure. 10. The sound insulating structure for underfloor piping according to claim 9, wherein a sound absorbing material and a sound insulating material are arranged on the outer periphery of the restraining material. 11. The underfloor piping according to claim 8, wherein the soundproofed joint piping is housed inside a box-shaped soundproof member or a tubular soundproof member. Soundproof structure. 12. A soundproofing member for use in a soundproofing structure for underfloor piping, comprising a floor of a building, underfloor piping and a foundation, wherein the basement is made of earth concrete, and the underfloor piping is It is provided in the underfloor space between the lower surface of the floor or the soil concrete and the floor, the underfloor piping is a floor penetrating pipe penetrating the floor, a horizontal draw pipe, and the floor penetrating pipe. A tubular soundproofing member, wherein the soundproofing member is a stretchable tubular soundproofing member, and the tubular soundproofing member is a bellows-shaped outer peripheral sound-insulating layer and the outer peripheral sound-insulating layer. And a sound-absorbing material layer on the inner side of the joint pipe, and the joint pipe is housed inside the tubular sound-proof member, so that the joint pipe is subjected to a soundproofing treatment. 13. The soundproofing member according to claim 12, wherein the joint pipe is an offset pipe.