JP6360692B2 - Sound insulation - Google Patents

Description

  The present invention relates to a sound insulation fitting, and more particularly, to a sound insulation fitting having both sound insulation properties and ventilation properties.

In recent years, due to the high airtightness of houses and the high sound insulation of outer walls, outdoor noise has become difficult to enter the house, but there are increasing voices that people are concerned about the sound of living in the house. In particular, the layout of living spaces such as living rooms, dining rooms, and kitchens has become more common, and the number of cases where these living spaces are close to the toilet space has increased. The need for is increasing.
In addition, toilet spaces are relatively often used as a ventilation route for 24-hour ventilation, and effective opening area is provided by providing ventilation galley on the outer surface of the door or by providing a gap (undercut) at the lower part of the door. Ensuring 100 to 150 cm ² or more is stipulated by the Building Standard Law. If it does so, ventilation louver and undercut will become a passage of sound simultaneously with air, and problems, such as being unable to maintain sound insulation by ensuring ventilation, have arisen.
Therefore, various doors having both sound insulation and ventilation as in Patent Document 1 have been proposed.

The soundproof door described in Patent Document 1 includes a door body made of a hollow body, and a front side opening and a back side opening provided on the outer surface of the door body communicate with each other via a hollow portion. Ventilation is possible on the front and back sides.
In addition, a sound absorbing material is attached to the inner wall surface surrounding the hollow portion, and the sound absorbing performance is exhibited by absorbing the sound by the sound absorbing material.

JP 2011-102467 A

As described above, if it is a fitting such as the door of Patent Document 1, it has a structure having sound insulation performance while relatively ensuring ventilation, but a simple structure without providing the above sound absorbing material separately. Therefore, a joinery that combines ventilation and sound insulation has been desired.
In particular, if a structure in which a sound absorbing material, a sound insulating material, or the like is attached to the interior of the joinery, not only the assembly work becomes difficult, but also the space through which air passes inside the joinery may be reduced, and ventilation may be impaired. There was also.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a sound insulation fitting having a sound insulation property while ensuring sufficient ventilation with a simple configuration.

ｆ：共鳴周波数（Ｈｚ）、ｃ：音速（ｍ／ｓ）、Ｐ：開孔率、
Ｌ：中空部の厚み（ｍ）、ｌ：面材の厚み（ｍ）、δ：開口端補正値（ｍ）

The object is achieved, according to the sound insulation fittings of the present invention, there is provided a reclosable sound insulation joinery attached to the opening of the building, it is provided at a position facing each other across the hollow portion in the thickness direction of the shielding sound joiner, the sound insulation a surface position of the space of the pair Ru partition in the opening in the closed state joinery material, is formed through the pair of face material to each said thickness direction, as well as communication with the hollow portion, not opposite to each other A pair of opening holes disposed at a position, and a sound insulation means for insulating sound transmitted from one side of the face material through the hollow portion to the other face material, The opening hole is formed of a slit-shaped hole, and the sound insulation means forms a resonator satisfying the following formula with the one opening hole, the hollow portion, and the other face material, It is solved by absorbing sound

f: resonance frequency (Hz), c: speed of sound (m / s), P: aperture ratio,
L: thickness of hollow part (m), l: thickness of face material (m), δ: open end correction value (m)

As described above, each of the pair of face materials is formed so as to penetrate in the thickness direction, and the pair of opening holes communicating with the hollow portion are provided. In particular, since no sound absorbing material or sound insulating material is attached to the interior of the sound insulation fitting as in the prior art, there is nothing that obstructs ventilation, and sufficient ventilation can be ensured.
Moreover, since the sound insulation means for insulating the sound transmitted from the one face material side to the other face material side through the hollow portion is provided, the sound insulation of the sound insulation fixture can be secured at the same time.
Specifically, the sound insulation means forms a resonator satisfying the following formula with one opening hole, a hollow portion, and the other face material, and has a simple configuration in which sound is absorbed by the resonator. The sound insulation fittings provided can be realized.
Briefly explaining the sound absorption mechanism, the resonance body resonates with the sound (sound wave) generated from the outside, and the air (air particles) vibrates vigorously in the slit hole portion of the resonance body. It is converted to heat energy and consumed. As a result, sound is absorbed.

At this time, the one opening hole may be disposed at a position lower than the other opening hole.
With the above configuration, for example, in the case where the sound insulation fitting is a door or a sliding door that partitions the toilet space, an action sound or drainage sound when using the toilet is generated from a position below the sound insulation fitting. Can be effectively insulated.

At this time, it is preferable that a plurality of the one opening holes are formed at intervals in the width direction of the one face material and extend in the vertical direction.
As described above, since a plurality of slit-shaped opening holes are formed, the sound insulating means can efficiently absorb sound.
In addition, since the slit-shaped opening hole is formed to extend in the vertical direction, dust or dust is accumulated around the opening hole as compared with the case where the opening hole is formed to extend in the direction intersecting the vertical direction. It becomes difficult to do. As a result, the sound absorption effect and ventilation are prevented from being hindered, and the shape takes into consideration hygiene.

At this time, the sound insulation means is a first sound insulation means, and a second sound insulation means for insulating sound transmitted from the other face material side to the one face material side through the hollow portion; The other opening hole is formed of a slit-shaped hole, and the second sound insulating means forms a resonator with the other opening hole, the hollow portion, and the one face material, The sound may be absorbed by the resonator.
According to the above configuration, not only the noise generated from the space on the one face member side but also the noise generated from the space on the other face member side can be blocked with a simple structure.

At this time, the resonance frequency f is preferably 500 Hz ≦ f ≦ 1500 Hz.
With the above configuration, for example, in the case where the sound insulation fitting is a door or a sliding door that partitions the toilet space, the frequency of the action sound when using the toilet is generally about 500 to 1000 Hz, and the frequency of the drainage sound is about 1000 to 1000 A sound of about 1500 Hz can be effectively insulated. That is, it is possible to reduce particularly unpleasant sound in daily life sounds.

At this time, at least the other face material of the pair of face materials may be a rigid wall.
With the above configuration, the sound absorption effect of the resonator formed by the sound insulating means is improved.

According to the sound insulation fitting of the present invention, it is possible to provide a sound insulation fitting having a sound insulation property while ensuring sufficient ventilation with a simple configuration.
In particular, when the sound insulation fitting is a door or a sliding door that partitions the toilet space, it is possible to effectively isolate the action sound and drainage sound generated when the toilet is used. That is, it is possible to reduce particularly unpleasant sound in daily life sounds.

It is a perspective view which shows the sound insulation fitting which concerns on this embodiment. It is a front view of a sound insulation fitting. It is III-III sectional drawing of a sound insulation fitting. It is a front view of a sound insulation fitting, Comprising: It is a principal part enlarged view. It is a VV end view of a sound insulation fitting. It is a front view of the sound insulation fitting which concerns on 2nd Embodiment. It is a front view of the sound insulation fitting which concerns on 3rd Embodiment.

Hereinafter, the sound insulation fitting which concerns on embodiment of this invention is demonstrated, referring FIGS. 1-7.
The present embodiment is a sound insulation fitting having sound insulation properties, and is formed through a pair of face materials provided at positions facing each other across the hollow portion, and communicates with the hollow portion, A pair of opening holes arranged at positions that do not face each other, and the sound insulation means forms a resonator with one of the slit-shaped opening holes, the hollow portion, and the other face material, and the resonator The present invention relates to an invention for a sound insulation fitting characterized in that sound insulation is performed by absorbing sound.
Sound insulation is to block sound so that sound generated in one space is not transmitted to the other space, and includes reducing sound leakage so that sound is difficult to be transmitted. Shall be.

The sound insulation fitting 1 according to the present embodiment is a partition that is attached to various buildings and room openings and has an opening / closing function, and specifically includes a door that partitions a toilet space as shown in FIG.
In addition, the sound insulation fitting 1 is not limited to the door which partitions a toilet space, but is widely applicable as a fitting attached to the opening part of a building or a room. For example, it may be an interior fitting such as a sliding door, a fence or a shoji screen, an entrance fitting used for a front door or the like, a window fitting such as a window installed on the outer periphery of a building or a room, or an exterior fitting such as a gate or a fence.

As shown in FIGS. 2 and 3, the sound insulation joiner 1 includes a pair of face members 10 provided at positions facing each other in the thickness direction of the sound insulation joiner 1 and a frame-like connecting member 20 that joins the pair of face members 10 together. And a hollow portion 30 corresponding to an internal space surrounded by the pair of face members 10 and the frame-shaped connecting member 20.
A pair of face materials 10 of the sound insulation fitting 1 are respectively formed with a pair of opening holes 11 penetrating in the thickness direction of the face material 10 and communicating with the hollow portion 30, a toilet side space and a room side space. It is a fitting with ventilation by circulating air through the hollow part 30 between the two.
Moreover, since the sound insulation fitting 1 is equipped with the sound insulation means for insulating the sound transmitted through the hollow part 30 between the space on the toilet side and the space on the room side, It has become. Details will be described later.

As shown in FIGS. 2 and 3, the face material 10 is made of a substantially rectangular plywood, and a toilet-side surface material 10 a and a room-side back material 10 b sandwich the connecting material 20 and the hollow portion 30. It is provided at an opposing position.
As shown in FIG. 3, the connecting member 20 is made of a frame-shaped plate member, is attached along the outer edge portion of the surface where the pair of face members 10 face each other, and is disposed so as to surround the hollow portion 30. .
In addition, although the face material 10 and the connection material 20 are formed separately, it is not limited to this, for example, the surface material 10a integrated with the connection material 20 and the back surface material 10b are bonded together. The sound insulation fitting 1 may be comprised.

In terms of specific numerical values for the height, width, and thickness of the face material 10, the height of the face material 10 is about 2000 to 2500 mm, the width is about 500 to 1000 mm, and the thickness is about 5 to 10 mm. Designed to be
The height of the frame-shaped connecting member 20 is equal to the height of the face member 10, the width is about 5 to 25 mm, and the thickness is about 20 to 30 mm.

As shown in FIGS. 2 and 3, the opening hole 11 is composed of a plurality of slit-like holes, and the front-side opening hole 11 a on the toilet side and the back-side opening hole 11 b on the living room side are located on both sides of the hollow portion 30. It is provided at a position that does not oppose.
Specifically, as shown in FIGS. 2 and 4, the slit-shaped opening hole 11 has a rectangular siding plate 12 that is long in the vertical direction with respect to a rectangular opening portion that is long in the door width direction. It is formed by attaching a plurality at intervals in the width direction. And the opening hole 11 is extended so that it may become elongate in an up-down direction.
In addition, although the opening hole 11 is formed in slit shape by attaching the siding board 12 to the said opening part, it is not limited to this, A plurality of slit-like holes are provided at intervals with respect to the face material 10. It may be formed by projecting.

As shown in FIG. 2, the front side opening hole 11a is disposed at a position lower than the door knob 13 on the outer surface of the surface material 10a, while the back side opening hole 11b is formed from the door knob 13 on the outer surface of the back surface material 10b. Is also disposed at an upper position.
In addition, the front side opening hole 11a and the back side opening hole 11b should just be arrange | positioned in the position which does not mutually oppose via the hollow part 30, in other words, the position which does not overlap, and may change arrangement | positioning suitably.

In terms of specific values for the height (length), width and thickness of the slit-shaped opening hole 11, the height of the opening hole 11 is about 150 to 350 mm, and the width is about 1.5 to 3.5 mm. The thickness is designed to be equal to the thickness of the face material 10.
Further, the slit-shaped opening holes 11 are designed so that about 20 to 30 holes are formed at an interval of about 20 to 40 mm in the door width direction.

ｆ：共鳴周波数（Ｈｚ）、ｃ：音速（ｍ／ｓ）、Ｐ：開孔率、
Ｌ：中空部３０の厚み（ｍ）、ｌ：面材１０の厚み（ｍ）、δ：開口端補正値（ｍ）
Next, the sound insulation means of the sound insulation fixture 1 will be described in detail with reference to FIGS.
The sound insulation means forms a Helmholtz resonator satisfying the following formula 1 with the opening hole 11 provided on the outer surface of one face member 10, the hollow portion 30, and the other face member 10, and the Helmholtz resonator absorbs sound. By doing so, it is configured to sound insulation.

f: resonance frequency (Hz), c: speed of sound (m / s), P: aperture ratio,
L: Thickness (m) of the hollow portion 30, l: Thickness (m) of the face material 10, δ: Open end correction value (m)

Briefly explaining the sound absorption mechanism, the resonance body resonates with the sound (sound wave) generated from the outside, and the air (air particles) vibrates vigorously in the slit hole portion of the resonance body. It is converted to heat energy and consumed. As a result, sound is absorbed.
The Helmholtz resonator has a structure in which the vibration energy of sound is efficiently consumed in the vicinity of the resonance frequency f represented by the above formula 1, and can absorb sound efficiently in the vicinity of the resonance frequency f.

δ：開口端補正値（ｍ）、Ｋ：開口端補正係数、ｂ：開口孔１１の幅（ｍ）

Ｋ：開口端補正係数、ａ：開口孔１１の高さ（ｍ）、ｂ：開口孔１１の幅（ｍ）
By the way, in the above numerical formula 1, the opening ratio P corresponds to a value obtained by dividing the total opening area of each opening hole 11 by the total unit area of the face material 10 corresponding to each opening hole 11.
In the present embodiment, since the opening holes 11 are provided at a certain interval in the door width direction, the opening ratio P is determined by changing the width of the opening holes 11 in the face material 10 to the interval (pitch of each opening hole 11). ).
Further, in the above formula 1, the opening end correction value δ is a value for correcting a phenomenon in which the antinode of the standing wave of sound slightly protrudes at the opening end when the sound resonates in the air column. Derived by 3.

δ: Open end correction value (m), K: Open end correction coefficient, b: Width of open hole 11 (m)

K: opening end correction coefficient, a: height of opening hole 11 (m), b: width of opening hole 11 (m)

In this embodiment, the sound transmitted from the toilet side to the living room side through the hollow portion 30 includes the front-side opening hole 11a of the surface material 10a, the hollow portion of the hollow portion 30 that faces the front-side opening hole 11a, and the back surface material. The sound is absorbed by the resonator structure formed by 10b.
Moreover, the sound transmitted from the living room side to the toilet side through the hollow portion 30 is generated by the back-side opening hole 11b of the back surface material 10b, the hollow portion of the hollow portion 30 facing the back-side opening hole 11b, and the surface material 10a. Sound is absorbed by the formed resonator structure.

Next, as a specific example of the sound insulation means, a sound insulation fixture 1 capable of effectively insulating the action sound when using the toilet and the drainage sound will be described with reference to FIGS.
It is generally known that the frequency of action sound when using a toilet is about 500 to 1000 Hz, and the frequency of drainage sound is about 1000 to 1500 Hz.
Therefore, by forming a resonance body structure in which the resonance frequency f is about 500 to 1500 Hz in the above formula 1, it is possible to effectively absorb the sound.

For example, when the resonator structure is formed so that the resonance frequency f is about 1000 Hz, the specific dimension value of the sound insulation fixture 1 may be set as follows.
The thickness l of the surface material 10a is about 6 mm, the height a of the front side opening hole 11a is about 200 mm, the width b is about 3 mm, the interval (pitch) d between the front side opening holes 11a is about 23 mm, The thickness L is set to about 24 mm.
The sound speed c is about 340 m / s.

In calculating the resonance frequency f, first, the aperture ratio P and the opening end correction value δ are obtained.
As described above, the opening ratio P is obtained by a value obtained by dividing the width b of the opening holes 11 by the interval (pitch) d between the opening holes 11.
The opening end correction value δ is obtained based on the above formulas 2 and 3, the height a of the opening hole 11, and the width b of the opening hole 11.
When the unit of mm is converted to the unit of m, the width b of the opening hole 11 is about 0.003 m, the height a of the opening hole 11 is about 0.2 m, and the distance d between the opening holes 11 is about 0.023 m. Become.

The resonance frequency f is obtained based on the above formula 1, the sound speed c, the aperture ratio P, the thickness L of the hollow portion 30, the thickness l of the face material 10, and the opening end correction value δ.
When the mm unit is converted to m unit, the sound velocity c is about 340 m / s, the thickness L of the hollow portion 30 is about 0.024 m, and the thickness l of the face material 10 is about 0.006 m.
When calculation is performed by applying each parameter to Equation 1 above, the resonance frequency f is about 994 Hz, and a resonance body in the vicinity of about 1000 Hz can be formed.

With the above configuration, it is possible to realize the sound insulation fitting 1 including the sound insulation means that specifically uses the Helmholm resonator.
In particular, it is possible to effectively isolate a sound of about 500 to 1000 Hz, which is a frequency of action sound when using the toilet, and about 1000 to 1500 Hz which is a frequency of drainage sound. That is, it is possible to reduce particularly unpleasant sound in daily life sounds.

If the number of the opening holes 11 is set to be about 22 in the above configuration, the effective opening area is about 132 cm ² calculated from the product of the height a, the width b, and the number of the opening holes 11. It becomes.
Therefore, since the effective opening area 100-150 cm < ² > or more prescribed | regulated by the building standard law can be ensured, sufficient ventilation performance can be exhibited.

<Second embodiment of sound insulation fitting>
Next, 2nd Example of the sound insulation fitting 1 is described based on FIG.
In addition, in order to clarify the difference in features in the following description, the description overlapping with the sound insulation fitting 1 according to the above embodiment is omitted.

In the sound insulation fixture 101 according to the second embodiment, the shape and arrangement of the opening holes 111 are different from those of the sound insulation fixture 1.
As shown in FIG. 6, the opening hole 111 includes a plurality of slit-shaped holes, and the front-side opening hole 111 a on the toilet side and the back-side opening hole 111 b on the living room side are provided at positions that do not face each other.
The slit-shaped opening 111 is formed by attaching a plurality of rectangular siding plates that are vertically long to the rectangular opening that is long in the vertical direction and spaced apart in the door width direction. . The opening hole 111 extends so as to be elongated in the vertical direction.
More specifically, the front side opening hole 111a is arranged on one end side in the door width direction on the outer surface of the face member 110, while the back side opening hole 111b is arranged on the other end side in the door width direction.

<Third embodiment of sound insulation fitting>
Next, a third embodiment of the sound insulation fitting 1 will be described with reference to FIG.
The sound insulation fitting 201 according to the third embodiment differs from the sound insulation fitting 1 in the shape and arrangement of the opening holes 111.
As shown in FIG. 7, the opening hole 211 includes a plurality of slit-shaped holes, and the front-side opening hole 211 a on the toilet side and the back-side opening hole 211 b on the living room side are provided at positions that do not face each other.
The slit-shaped opening hole 211 is formed by attaching a plurality of rectangular siding plates elongated in the door width direction at intervals in the vertical direction to an elliptical opening portion elongated in the door width direction. ing. The opening hole 211 extends so as to be long in the door width direction.
More specifically, the front side opening hole 211a is arranged on the upper end side on the outer surface of the face material 210, while the back side opening hole 211b is arranged on the lower end side.

  Since the shape and arrangement of the sound insulation fitting can be appropriately changed according to the user's request like the above sound insulation fittings 101 and 201, the design and the degree of freedom of arrangement can be improved.

    <Other embodiments>

In the above embodiment, the sound insulation means of the sound insulation fixture 1 is formed with a Helmholtz resonator having a resonance frequency f of 500 Hz ≦ f ≦ 1500 Hz, but the application of the frequency of the resonance frequency f is not limited to the above range. The range may be changed as appropriate.
For example, it is desirable that sound of about 300 to 3000 Hz, which is generally regarded as noise in daily life, can be effectively insulated.

Moreover, in the said embodiment, although the sound insulation fitting 1 can sound-insulate with a simple structure, without attaching a sound-absorbing material and a sound insulation material separately, it does not need to be specifically limited.
In other words, a sound absorbing material or a sound insulating material may be separately attached to the inner wall surface surrounding the hollow portion 30, and a sound insulating fitting that prioritizes the sound insulating performance and further improves the sound insulating performance while ensuring the minimum ventilation performance may be used.

Moreover, in the said embodiment, although the sound insulation fitting 1 is provided with the some slit-shaped opening hole 11, it is not limited to this, The number, shape, or arrangement | positioning of the opening hole 11 can be changed.
For example, it is good also as a structure provided with only one slit-shaped opening hole 11 instead of plural, or the opening hole 11 may extend in an inclined direction inclined with respect to the vertical direction.

Moreover, in the said embodiment, although a pair of face material 10 is formed from the plywood, it is not limited to this, For example, at least the surface material 10a is a plurality of plywood in the thickness direction among a pair of face materials 10. It may be formed as a rigid wall by overlapping.
In this way, the sound absorption effect of the resonator is improved.

In the said embodiment, the sound insulation fitting which concerns on this invention was mainly demonstrated.
However, said embodiment is only an example for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.
In particular, the shape, arrangement, or configuration of the opening holes 11, 111, and 211 described in the above embodiment is merely an example, and does not limit the present invention.

DESCRIPTION OF SYMBOLS 1, 101, 201 Sound insulation fittings 10, 110, 210 Face material 10a Surface material 10b Back surface material 11, 111, 211 Opening hole 11a, 111a, 211a Front side opening hole 11b, 111b, 211b Back side opening hole 12 Panel 13 Door knob 20 Connecting material 30 Hollow part a Opening hole height b Opening hole width d Opening hole interval (pitch)
l Thickness of surface material L Thickness of hollow part

Claims (6)

A sound insulation fitting that can be opened and closed attached to an opening of a building ,
In shielding sound joinery in the thickness direction is provided in opposing positions across the hollow portion, a pair of face material spatial Ru partition in a state where the closed sound insulation fittings at the location of the opening,
A pair of opening holes that are formed through the pair of face materials in the thickness direction, communicate with the hollow portion, and are disposed at positions not facing each other;
Sound insulation means for insulating sound transmitted from the one face material side to the other face material side through the hollow portion;
One said opening hole consists of a slit-shaped hole,
In the sound insulation means, the one opening hole, the hollow portion, and the other face material form a resonator satisfying the following formula, and the sound is absorbed by the resonator. Sound insulation fittings.

f: resonance frequency (Hz), c: speed of sound (m / s), P: aperture ratio,
L: thickness of hollow part (m), l: thickness of face material (m), δ: open end correction value (m)
  The sound insulation fitting according to claim 1, wherein the one opening hole is disposed at a position below the other opening hole.   The sound insulation fitting according to claim 1 or 2, wherein a plurality of the one opening holes are formed at intervals in the width direction of the one face material and extend in the vertical direction. The sound insulation means is a first sound insulation means,
A second sound insulating means for insulating sound transmitted from the other face material side to the one face material side through the hollow portion;
The other opening hole is a slit-shaped hole,
The second sound insulating means forms a resonator with the other opening hole, the hollow portion, and the one face material, and absorbs the sound by the resonator. The sound insulation fitting of any one of 1-3.   5. The sound insulation fitting according to claim 1, wherein the resonance frequency f is 500 Hz ≦ f ≦ 1500 Hz.   The sound insulation fitting according to any one of claims 1 to 5, wherein at least the other face material of the pair of face materials is formed of a rigid wall.

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