JP2002146727A - Translucent soundproof plate and sound insulating wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soundproof plate and a sound insulating wall having translucency and transparent efficiency without being an obstacle to sunshine or the field of vision and including favorable sound absorption effect and sound insulation effect. SOLUTION: The translucent soundproof plate 6 is so constituted that a translucent sound absorbing material 1 formed by boring a large number of holes with 2 mm or less in thickness in a thin membranous material with 2 mm or less in thickness such as polyvinyl fluoride, polyethylene fluoride or the like, panel frame materials 3, sound absorbing materials 51 to 53 arranged to the inside thereof and a translucent sound insulating plate 2 or the like such as polycarbonate, vinyl chloride, methacrylic resin or the like have air spaces 4 between the translucent sound absorbing material 1 and the sound insulating plate 2 and that it is built up by using a rivet, a screw, an adhesive or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-insulating plate having a light-transmitting property, a see-through property and a sound absorbing property, and a sound-insulating wall using the same.

[0002]

2. Description of the Related Art Conventionally, as a sound insulating plate used for a sound insulating wall, a sound absorbing material such as glass wool is put in a frame made of metal or the like to make the sound source side sound absorbing and the opposite side is made of a sound insulating plate. A sound-absorbing sound-insulating plate and a light-transmitting sound-insulating plate using a transparent plastic such as polycarbonate are used.The former sound-absorbing sound-insulating plate has sound-absorbing and sound-insulating properties, but has a light-transmitting and transparent property. There is a problem that obstructs the sunshine and visibility because there is no sound.The latter translucent sound-insulating plate has translucency, see-through and sound-insulating properties. There was a problem that would happen.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a light transmitting property and a light transmitting property which do not obstruct sunshine and a field of view, and has a preferable sound absorbing property. And a soundproof plate and a soundproof wall having sound insulation.

[0004]

SUMMARY OF THE INVENTION The above-mentioned problem is caused by a light-transmitting sound-absorbing material and a light-transmitting sound-insulating plate which are made of a light-transmitting film-like material which has been subjected to a hole-penetration process on the film surface. This problem can be solved by the light-transmitting soundproof plate of the present invention, which comprises a panel frame material held at a fixed interval. Further, the light-transmitting soundproofing plate of the present invention can be embodied in a form in which the light-transmitting sound-absorbing material is a light-transmitting film-shaped material provided with a large number of holes having a hole diameter of 2 mm or less.

[0005] Further, even in the above soundproofing plate having translucency and transparency, when a certain temperature difference occurs between the internal space and the outside, moisture inside may condense on the inner surface and cause fogging. However, the incidental phenomenon that light transmission and transparency are impaired was recognized.However, in the present invention, the problem of dew condensation was solved by forming a ventilation opening in a part of the light-transmitting soundproof plate to reduce dew condensation. The problem can be solved by the above-mentioned translucent soundproof plate adopting the structure that prevents the above problem. Then, a desiccant may be sealed in the light-transmitting soundproof plate, or a photocatalyst, a hydrophilic material, or a water-repellent material may be applied to the inner surface of the light-transmitting soundproof plate to adopt a structure in which dew condensation is prevented. it can.
Further, each of the above-mentioned problems can be solved by a light-transmitting soundproof wall provided with the light-transmitting soundproof plate having the above configuration.

According to the present invention, sound energy can be absorbed by resonance by using, for example, a perforated resin film material as the translucent sound absorbing material. In addition, when a perforated plate is disposed as a translucent sound absorbing material on both sides or one surface of the perforated resin film material, the effect of sound absorption by vibration of the film material and sound absorption by resonance in the perforated portion can be obtained. Furthermore, the conventional perforated plate is made of a polycarbonate plate, an aluminum plate, etc., which has been subjected to perforation processing on a relatively thick rigid material, and is heavy and expensive. Is advantageous because it is lightweight and inexpensive.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a light-transmitting soundproof plate and a soundproof wall according to the present invention will be described with reference to FIGS. The essential components of the soundproof plate of the present invention are shown in FIG.
And a light-transmitting sound-absorbing material 1 made of a light-transmitting film-like material having a perforated film surface, a light-transmitting sound insulating plate 2 mainly having a sound insulating function, and an air layer 4. Of the panel frame member 3 which is held through the base member.
Hereinafter, each will be described in detail.

(1) Translucent sound-absorbing material The translucent sound-absorbing material 1 used in the present invention is made of a translucent and transparent film-like material in which a film surface is perforated to penetrate front and back. Be composed. The translucent sound absorbing material 1 is a sound absorbing material having a perforated plate structure that functions so that when sound waves strike the hole, the air in the hole vibrates and absorbs energy by friction with the hole wall. While the perforated structure has a large pore size, it is difficult to obtain high sound absorption characteristics over a wide frequency range with a strong peak, whereas in the present invention, the pore size is relatively small to form a large number of holes. As a result, the frictional resistance at the hole is increased, so that not only the frequency obtained as the resonance frequency but also a high sound absorption characteristic can be obtained not only at the peripheral frequency.

Examples of the film-like material used in this method include fluororesin-based film-like materials such as polyvinyl fluoride and polyfluoroethylene, polyester, polypropylene, polyvinyl chloride, polyethylene, vinyl acetate, polyvinylidene, polycarbonate, vinyl chloride, and the like. A thin or thin material of a synthetic resin such as a methacrylic resin, a styrene resin, an ABS resin, an acrylic resin, or rubber and having a light-transmitting property and a transparent property is used as a single layer or a plurality of layers.

When used in multiple layers, higher sound absorption performance can be obtained over a wide frequency range than in a single layer. That is,
Since the distance (thickness of the air layer 4) from the sound insulating plate 2 used in combination with the translucent sound absorbing material 1 is different, a peak of sound absorption characteristics corresponding to the distance appears (two peaks in the case of two layers). This is because high sound absorption performance can be obtained over a wide frequency range.

Further, the thickness of the film material is preferably 2 mm or less. If the thickness is too large, drilling becomes difficult and expensive. Further, if the thickness is too thin, it is easily broken, so that the thickness is practically 0.006 mm or more.

The size of the hole formed on the film surface of the film material is preferably 2 mm or less. Higher sound absorption characteristics over a wide range of frequencies can be obtained by making the hole diameter smaller and making more holes. On the other hand, if the hole diameter is too large, the tensile strength of the sound absorbing material decreases. In the drilling, a large number of holes of a fixed size may be drilled regularly or irregularly, or holes of different sizes may be drilled. In this case, high sound absorption characteristics can be obtained over a wide frequency range.

The aperture ratio of the holes does not need to be set to 10% or more of the film surface in order to obtain a sufficient sound absorbing characteristic. If the aperture ratio is increased, the holes are easily broken, so this range is practical. . The shape of the opening of the hole is not particularly limited, and may be a circle, an ellipse, a triangle, a square (square, rectangle), or an irregular shape. Further, holes of different shapes may be appropriately combined. In cases other than a perfect circle such as an ellipse, a triangle, and a square, it is preferable that the size of the hole is equal to or less than an area corresponding to a perfect circle having a pore diameter (diameter) of 2 mm. In order to obtain sound absorption characteristics that match the sound absorption target frequency (resonance frequency), the thickness, hole diameter, space between holes, aperture ratio, and air layer 4 ( It can be set by selecting the distance between the sound absorbing material and the sound insulating plate).

When such a porous sound-absorbing material 1 is attached to the panel frame member 3, as shown in FIG. 2, a holding plate 31 is attached to a support frame member 31 attached to a key portion of the panel frame member 3. 3
The peripheral portion of the translucent sound absorbing material 1 may be screwed or caulked by sandwiching between the two. However, in this case, it is preferable to attach the translucent sound absorbing material 1 with tension. By applying the tension in this manner, the light-transmitting sound absorbing material 1 itself can be prevented from vibrating with respect to the sound wave, and the sound absorbing effect in the hole can be sufficiently performed.

(2) Combined Structure of Translucent Sound Absorbing Material and Perforated Plate In the present invention, in order to protect the translucent sound absorbing material 1 to be used, perforated plates may be arranged on both sides or one side thereof.
In this case, when the translucent sound absorbing material 1 is slightly loosened and attached to the panel frame material, the perforated plate is adjusted so that the sound absorbing material vibrates appropriately when a sound wave is applied, so that sound energy absorption occurs. In addition, a sound absorbing effect synergistic with sound absorption due to resonance in the perforated portion of the light transmitting sound absorbing material can be obtained.

As the perforated plate, aluminum, iron,
For nets made of various materials such as glass and synthetic resin, nets such as expanded metal, metal plates such as aluminum and iron, inorganic plates such as calcium silicate plates and ceramic plates, and organic plates such as polycarbonate and polyvinyl chloride. A perforated plate with through holes can be used. The aperture ratio of this perforated plate is 4 to ensure sound absorption and permeation and transparency.
0% or more is preferable. The size of one opening (hole) is preferably 3 to 50 mm. It is preferable that the holes be large in order to improve the transparency, but the above range is appropriate because the function of adjusting the film vibration of the light-transmitting sound absorbing material 1 is likely to be reduced and the sound absorption coefficient is reduced.

Further, in the combination of the translucent sound absorbing material 1 and the perforated plate, the perforated plates are arranged on both sides or one side for one layer of the sound absorbing material. In order to adjust the vibration of the light-transmitting sound-absorbing material 1 due to the sound wave, the film material forming the light-transmitting sound-absorbing material 1 is lightly touched or not touched to the perforated plate, or is partially or not touched. It is preferable to have a moderately loose structure. Excessive looseness lowers the sound absorbing function in the hole, so it is necessary to make adjustments so that both functions.

Further, a plurality of sets combining the light-transmitting sound absorbing material and the perforated plate may be combined, or a set combining the light transmitting sound absorbing material and the perforated plate and the porous sound absorbing material may be arranged in multiple layers. You may do so. In this case, high sound absorption characteristics can be obtained over a wider frequency range.

(3) Panel Frame Material and Mounting Member The panel frame material 3 for assembling the light transmitting sound absorbing material and the light transmitting sound insulating material is made of a metal such as aluminum or iron, a synthetic resin such as vinyl chloride, or a ceramic. Formed from inorganic materials such as cement. Further, in order to further enhance the translucency and the transparency, the panel frame member 3 and the H-shaped frame member 35 (FIG. 1), the support frame member 31, and the holding plate 32 (FIG. 2) are provided with polycarbonate, vinyl chloride, methacrylic resin, and styrene. Use a synthetic resin or rubber such as a resin, an ABS resin, a fluorinated ethylene resin, or an acrylic resin, which has a light-transmitting property or a transparent property, or a material having a light-transmitting property or a transparent property such as transparent or translucent glass. Is good.

(4) Internal Sound Absorbing Material In the present invention, in order to further enhance the sound absorbing characteristics, as shown in FIG. 3, a light transmitting sound absorbing material 1 and a sound insulating plate 2 are provided.
It is preferable to use the internal sound absorbing materials 51, 52, 53, etc. between them. In this case, the internal sound absorbing material 5
Like 2, 53 along the side of the panel frame 3,
Like the internal sound absorbing material 51, it may be arranged in the middle, slitted in the vertical or horizontal direction, lattice-shaped, round hole-shaped, etc., may be arranged in any shape. It is preferable that the transparent portion is arranged so that the opening portion that can be seen through is at least 30% of the area of the entire soundproof plate. If it is less than 30%, the translucency and the translucency deteriorate, which is not preferable.

The sound absorbing material is preferably a porous sound absorbing material having communication holes, and a porous sound absorbing material made of inorganic fiber such as glass wool or rock wool, or a metal porous material made of metal fiber such as aluminum fiber. , Aluminum foam, sintered aluminum particles, sintered ceramic particles, foams such as urethane and melamine resin, ceramic foam, lightweight aggregate sintered or bonded porous material, cement foam, A calcium silicate foam or the like is used. The porosity, flow resistance, air permeability, bulk specific gravity, size, thickness, presence or absence of an air layer behind at the time of installation, sound absorption characteristics of the internal sound absorbing material itself, and the like are appropriately selected and used, and are not particularly limited.

(5) Translucent Sound Insulating Plate The translucent sound insulating plate 2 of the present invention is made of polycarbonate,
Vinyl chloride, methacrylic resin, styrene resin, ABS
Synthetic resin materials and rubber materials such as resin, fluorinated ethylene resin and acrylic resin, which have translucency and see-through properties, and transparent or translucent glass and other materials having translucency and see-through properties It is preferable to use one or more of them in a layered structure. Although the size is determined by the size of the soundproofing plate, the thickness is set in accordance with the required sound insulation power (sound transmission loss). 10 to 10 mm is preferred.

(6) Light-Transmissive Soundproofing Plate of the Present Invention The light-transmitting soundproofing plate of the present invention comprises the light-transmitting sound-absorbing material 1, the panel frame member 3, and the sound-absorbing materials 51 to 53 disposed inside. ,
The light-transmitting sound-absorbing plate 2 and the like are assembled using a rivet, a screw, an adhesive, or the like in a form in which an air layer 4 is provided between the light-transmitting sound-absorbing material 1 and the sound insulating plate 2. It is formed as a light-transmitting soundproof plate 6 shown in FIG. Here, it is preferable that the translucent sound absorbing material 1 and the translucent sound insulating plate 2 be replaced with a structure that facilitates replacement work.

The thickness of the entire soundproof plate 6 is set in accordance with the frequency of the sound source. When the thickness is reduced, the sound absorption in the low frequency region is improved when the high frequency region is increased. Generally 50 ~
It is good to use it with a thickness of 200 mm. Also, soundproof plate 6
It can itself be curved and applied to curved sound barriers. Further, on the side of the light-transmitting sound insulating plate used for this, a treatment for weather resistance to ultraviolet rays or the like or a treatment for improving the surface hardness, or a reinforcing material provided with a metal net or the like is used. Is also good. Further, the light-transmitting sound-absorbing material side may be similarly subjected to a weather resistance treatment against ultraviolet rays or the like. In addition, a photocatalyst such as titanium dioxide, which has a stain preventing and nitrogen oxide purifying action, is provided on the front, back and inside of the light-transmitting soundproof plate 6.
A hydrophilic polymer material or a water-repellent material may be attached by coating or the like.

Further, holes may be provided at the upper end and the lower end of the soundproof plate 6 at a fitting portion or both ends when the soundproof plate 6 is stacked and installed, and through which a wire rope for drop prevention is passed. When both sides of the light-transmitting sound insulating plate 6 are made to have sound absorbing properties, the cross-sectional structure of the sound insulating plate is made of a light-transmitting sound absorbing material, an air layer, a light transmitting sound insulating plate, an air layer, a light transmitting sound absorbing material. Then, a translucent sound absorbing material may be arranged on both sides of the sound insulating plate.

Further, in the light-transmitting soundproofing plate of the present invention, by adopting a structure in which dew condensation is prevented by providing a ventilation opening in a part of the soundproofing plate, the internal moisture is condensed on the inner surface to allow the light to pass therethrough. It is possible to solve the phenomenon that light and transparency are impaired. As described above, the provision of the ventilation opening in a part of the soundproof plate is for promoting the flow of the internal air and the outside air, and for promoting the uniformity of the temperature and the dispersion of the moisture, and will be described below. It can be further embodied.

1) A translucent sound absorbing material is placed 5 to 10
mm, that is, with a gap,
If the panel frame is perforated and slit holes or round holes are provided to improve the circulation with the outside air, dew condensation can be effectively prevented.

As shown in FIG. 6, in order to mount the light-transmitting sound-absorbing material on the panel frame, the periphery of the light-transmitting sound-absorbing material 1 is trimmed with a reinforcing material 11 to form a panel. The support frame 33 provided on the frame member 3 may be attached to the support frame member 33 with screws, bolts, rivets or simple fasteners (one-touch metal fittings) via a mounting jig 34. This has the advantage that replacement during maintenance on site is facilitated.

2) When the ventilation opening is formed on the upper surface side of the soundproofing plate, it is preferable to provide an eave or the like because rainwater easily penetrates. Particularly, a side surface of the soundproofing plate, preferably a lower surface side is preferable. It is good to provide in. Even in this case, it is preferable to adopt an intricate opening structure so that the splash of rainwater does not enter. Further, it is preferable to appropriately dispose a drain hole at a lower portion of the panel frame so that the invading rainwater can be discharged. Further, when these soundproof plates are soundproof walls, it is necessary to adjust them in advance so as to prevent noise from leaking from the ventilation openings, in consideration of the positional relationship between the ventilation openings.
With the structure described above, the present invention can effectively prevent fogging due to dew condensation on the inner surface of the soundproof plate due to sudden changes in temperature, humidity, and the like. Furthermore, since it is difficult for rainwater to enter and drain easily, there is an advantage that in addition to the effect of preventing dew condensation, corrosion and deterioration of the panel frame material and the like due to moisture can be reduced.

Further, in the present invention, a photocatalyst, a hydrophilic material or a water-repellent material is applied and adhered to the inner surface of the soundproof plate,
Fogging due to condensation on the inner surface of the soundproof plate can be prevented.
In this case, as the photocatalyst, anatase type titanium dioxide is suitable, and as the hydrophilic material, silica based,
Alumina composite metal-based, silicone-based paint or coating agent having a hydrophilic group is suitable, as a water-repellent material,
Acrylic silicon-based and silicone-based coating agents having a hydrophobic group are preferred. In this case, a structure provided with the above-mentioned ventilation opening or drain hole may be used together. In addition to the dew condensation preventing means described above, it is also possible to appropriately employ a method in which a silica gel-based desiccant is sealed inside the soundproofing plate, or the soundproofing plate itself is configured in a closed structure.

(7) Soundproofing wall of the present invention The soundproofing wall of the present invention is configured by arranging a plurality of the above-described translucent soundproofing plates 6 in a stacked or parallel manner, and includes, for example, As illustrated in FIG. 5, the light-transmitting sound-absorbing plate 6 is dropped from above onto the H-shaped support 10 (H-shaped steel) standing at a predetermined interval with the light-transmitting sound-absorbing material side of the light-transmitting sound absorbing plate 6 as a sound source side. It is fixed by e.g. A fixing hole may be provided in the H-type support 10 and bolted.
In order to increase the height of the soundproof wall, a large number of soundproof plates may be appropriately stacked.

Next, Table 1 shows examples of translucent sound absorbing materials suitable for the present invention, together with the results of measuring the sound absorption and light transmittance.
It is shown in Table 2. In this case, test pieces having various configurations shown in Table 1 were obtained by drilling a film material such as polycarbonate using a continuous punching machine. The sound absorption of this test specimen was measured in accordance with JIS A1405, "Method of measuring the normal incidence sound absorption coefficient by the in-tube method", and the light transmittance was measured with a visible light transmittance meter. As a result, it can be seen that the light-transmitting sound-absorbing material of the present invention is far superior in terms of sound absorption and light transmittance as compared with conventional materials.

[0033]

[Table 1]

[0034]

[Table 2]

Next, Table 2 shows examples of the light-transmitting soundproof plate according to the present invention, together with the measurement results of the sound absorption coefficient and the light transmittance. In this translucent soundproof plate, Table 1 is used as a translucent sound absorbing material.
No. of description. 7, a 1.5 mm thick aluminum extruded material is used as the panel frame material, and a 5 mm thick transparent polycarbonate plate is used as the translucent sound insulating plate. The inner sound absorbing material is formed along the inner surface of the panel frame material. Was placed. The finished size as a translucent soundproof plate is 1000 mm long x 200 mm wide.
The thickness was 0 mm and the thickness was 110 mm. The sound absorbing coefficient of this translucent soundproof plate in the reverberation room method is 250 Hz: 0.60, 500H.
z: 0.85, 1000 Hz: 0.98, 2000H
z: 0.80, and the sound transmission loss is 250 Hz: 2
1 dB, 500 Hz: 27 dB, 1000 Hz: 30 dB
B, 2000 Hz: 34 dB. The light transmittance was 78%.

[0036]

The light-transmitting sound-insulating plate of the present invention is constructed as described above, and thus is a sound-insulating plate having not only a light-transmitting property and a see-through property but also a sound-absorbing property and a sound-insulating property. When installed as a soundproofing wall, even if the wall is raised to enhance the soundproofing effect, the sunshine and visibility (transparency) are not impaired, and sound reflection on the sound source side can be suppressed, so that an appropriate soundproofing effect can be secured. There is an excellent effect. Therefore, the present invention has extremely high industrial value as a light-transmitting soundproofing plate and a soundproofing wall which have solved the conventional problems.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of a light-transmitting soundproof plate of the present invention.

FIG. 2 is an essential part cross-sectional view showing a mounting portion of a light-transmitting soundproofing material.

FIG. 3 is a sectional view of a main part showing another embodiment of the light-transmitting soundproof plate of the present invention.

FIG. 4 is a front view of the light-transmitting soundproof plate of the present invention.

FIG. 5 is a front view of the light-transmitting soundproof wall of the present invention.

FIG. 6 is an essential part cross-sectional view showing one example of a mounting portion of a light-transmitting soundproof material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Translucent sound-absorbing material, 10 H-shaped support, 2 translucent sound-insulating plates, 3 panel frame materials, 4 air layers, 51, 52, 53 Sound-absorbing materials arranged inside, 6 translucent sound-insulating plates.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Katsuo Uesaka Inventor F-term (Reference) 2D001 AA01 BA02 BB01 CA01 CB02 CC01 CD02 CD03 DA04 DA07 5D061 BB02 2-6, Suda-cho, Mizuho-ku, Nagoya-shi, Aichi Japan BB28 BB37

Claims (7)

[Claims] 1. A light-transmitting sound-absorbing material and a light-transmitting sound-insulating plate made of a light-transmitting film-like material having a perforated surface that penetrates the film surface from front to back, and a panel frame member that holds these at a predetermined interval. A light-transmitting soundproofing plate comprising: 2. The light-transmitting sound-insulating plate according to claim 1, wherein said light-transmitting sound-absorbing material is a light-transmitting film-like material having a large number of holes having a hole diameter of 2 mm or less. 3. The light-transmitting soundproofing plate according to claim 1, wherein a ventilation opening is provided in a part of the light-transmitting soundproofing plate to prevent condensation. 4. The light-transmitting soundproofing plate according to claim 1, wherein a desiccant is sealed in the light-transmitting soundproofing plate to prevent condensation. 5. The light-transmitting soundproof plate according to claim 1, wherein a photocatalyst, a hydrophilic material, or a water-repellent material is applied to an inner surface of the light-transmitting soundproof plate to prevent dew condensation. 6. The light-transmitting soundproof plate according to claim 1, comprising a panel frame member made of a light-transmitting material and a mounting member. 7. A light-transmitting soundproof wall comprising the light-transmitting soundproof plate according to claim 1.