JPH05222783A - Noise absorbing wall device - Google Patents

Abstract

PURPOSE:To improve the function by holding a porous sound absorbing plate consisting of ceramic grains with a decorative plate with a lot of small holes, and attaching it to a ceiling or the like at a specified interval, while installing an interconnecting passage in space between two sides of it. CONSTITUTION:A flange 1a is installed in a peripheral part, and an almost square dished decorative plate with a lot of small holes on the bottom is formed up. Next, there is provided a porous sound absorbing plate 5, bonding ceramic grains with a binder, and this plate 5 is housed in the decorative plate 1. In succession, a grating frame member consisting of an upper frame and a lower frame 6 is installed there and attached to a ceiling or the like at a specified interval. After attaching the plate 1 to this frame 6 further with a bracket, a decorative frame 2 is attached to this bracket. At this time, each of air vent passages 30, 31 is formed between these members, setting them down to an air flowing passage at the time of room temperature changes between the room inside and the backside space of the plate 1. With this constitution, grain size and void percentage of the sound absorbing plate are adjusted and thus a desired sound absorbing characteristic is formable while any ventilation in the decorative plate small hole is kept back, through which dust sticking due to static electricity is preventable and, the execution of works can be done easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing wall device such as a ceiling or a wall surface. More specifically, the present invention relates to a sound absorbing wall device which has an excellent sound absorbing effect, is free from stains on the wall surface, is free from scattering materials such as sound absorbing material, and is easy to install.

[0002]

2. Description of the Related Art Generally, for example, in a building or a tunnel having a concrete skeleton or wall, there is a problem that sound is reverberated in a room or an internal space, sound effects are impaired, and noise is increased. It was

In order to prevent such a problem, a sound absorbing wall has been conventionally attached to the ceiling or side wall surface of such a building or tunnel. Such a sound absorbing wall device generally includes a frame material for supporting the wall material, a decorative plate attached to the frame material, and a sound absorbing material arranged on the back surface side of the decorative plate. The decorative plate is made of, for example, metal or other material, and is a porous plate having a large number of small holes formed therein for transmitting sound to the sound absorbing material. Further, as the sound absorbing material, so-called rock wool or the like made of fibers of an inorganic material is used.

By the way, the above decorative plate needs to transmit sound as described above, and has to be porous in which a large number of small holes are formed as described above. On the other hand, when the temperature or the like in the room or space in which such a sound absorbing wall is provided changes, the air in the space between the decorative plate of the sound absorbing wall and the wall surface expands or contracts, and the sound absorbing material or Air flows through the small holes of the porous decorative plate. Therefore, static electricity is generated on the decorative board and sound absorbing material due to such air flow,
Dust is adsorbed to the edges of the small holes of the decorative plate to stain it and impair its appearance. In addition, the broken pieces of rockwool fibers as described above may float in the room or space together with the circulating air, which may adversely affect the human body.

In order to prevent such a problem, for example, measures may be taken such as wrapping the above-mentioned sound absorbing material rockwool in an air impermeable sheet and then arranging it on the back side of the decorative plate. .. However, in this case, the sound absorbing effect of the rock wool is lowered, and the construction is troublesome. Furthermore, the sound absorption efficiency of the conventional rock wool sound absorbing material is not so high, so it is necessary to increase the thickness in order to obtain a sufficient sound absorbing effect. There was a problem such as having to form a large space on the side.

[0006]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances. Air can be prevented from flowing through the decorative plate, and the decorative plate can be prevented from being soiled. Provided is a sound absorbing wall device such as a ceiling or a side wall that does not scatter or float inside a room or the like, has a high sound absorbing effect, and is easily constructed.

[0007]

The sound absorbing wall device of the present invention comprises:
A frame member for supporting a decorative plate and the like, a porous decorative plate attached to the frame member, and a sound absorbing plate member arranged on the back surface side of the decorative plate are provided. The sound absorbing plate member is made of a material in which ceramic particles are bound with a binder. Further, the space on the back side of the decorative plate and the space on the indoor side are communicated by a communication passage.

Preferably, the sound absorbing plate member is reinforced by embedding a metal wire mesh, or by gluing porous sheets on both side surfaces. In addition, a decorative frame is arranged between the edges of the above decorative plates to conceal the mounting portions of the edges of these decorative plates, and there is a gap between these decorative frames and the edges of the decorative plate. Is formed, and this gap is formed as the communication passage.

[0009]

Since the sound absorbing wall device as described above is made of a porous material in which ceramic particles are bound by a binder as a sound absorbing material, the sound absorbing effect is high and the diameter and porosity of the ceramic particles are changed. By doing so, a predetermined sound absorption characteristic can be obtained. Therefore, it is possible to easily set the optimum sound absorbing characteristics in accordance with the room or purpose for which the sound absorbing wall device is constructed.

Further, since the resistance when air permeates the sound absorbing plate member is large, when the expansion and contraction of the air in the space on the back side of the decorative plate occurs, the air is the sound absorbing plate member. And does not pass through the porous decorative plate, and flows through the communication passage. Therefore, dust is not adsorbed on the edges of the small holes of the decorative plate, the decorative plate is not contaminated, and the appearance is good.

Further, since the above-mentioned sound absorbing material is formed of a material in which ceramic particles are bound with a binder, even if the ceramic particles fall off, the particles are granular and heavy. , It never floats indoors. Also, when the sound absorbing wall device is installed on the ceiling, even if the exfoliated ceramic particles fall,
Since it does not float in the air, it does not adversely affect the human body.

Further, the sound absorbing plate member made of such a material in which ceramic particles are bound with a binder exhibits a great sound absorbing effect even if the thickness is thin, and can be easily cut into an arbitrary shape and attached. Construction is easy because it can be done.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show a first embodiment of the present invention, which is a sound absorbing wall device mainly installed on a ceiling.

This sound absorbing wall device, that is, the sound absorbing ceiling device,
As shown in FIG. 1, it has a shape like a lattice ceiling.
1 and 2 show a schematic configuration of this ceiling device. Reference numeral 1 in the figure is a decorative plate. These decorative plates 1 are shown in FIG.
These decorative panels 1 are arranged and attached as shown in FIG.
Decorative frames 2 and 3 are arranged between them to form a lattice-shaped ceiling as a whole.

An upper frame member 7 is shown in FIG. 2, and the upper frame member 7 is suspended by a suspending metal member 8 from, for example, the ceiling portion of the frame of the building. Further, the lower frame member 6 is attached so as to intersect with the upper frame member 7. These lower frame members 6 are arranged in parallel at intervals slightly wider than the width of the decorative plate 1, and are attached to the upper frame member 7 by a coupling fitting 9. The upper frame member 7 and the lower frame member 6 are both metal plate mold members such as stainless steel plates.

Mounting fittings 10 are attached to the lower frame member 6, and these mounting fittings 10 are arranged corresponding to the corners of the decorative plate 1, respectively. The decorative plate 1 is formed by press-molding a metal plate such as a stainless steel plate, an aluminum plate, or a plated steel plate for a ceiling plate, and has a substantially square shallow dish shape and its periphery. A flange portion 1a is formed integrally with the portion.

A large number of small holes 4 are formed on the bottom surface of the decorative plate 1, and the decorative plate 1 is porous. A substantially square sound absorbing plate member 5 is housed in these decorative plates 1. Since the decorative plate 1 is arranged horizontally, these sound absorbing plate members 5 are not particularly fixed to these decorative plates 1 and are closely attached to the back surface side of the bottom of the decorative plate 1. It is just placed.

Further, on the lower surface of the above-mentioned fitting 10,
The fixing fittings 11 are attached by screws. The corners of the flange portion 1a of the decorative plate 1 are sandwiched between the fixing metal fittings 11 and the mounting metal fittings 10, so that these decorative metal plates 1 are attached to the lower frame member 6 described above.
It is attached and fixed to. Also, the above-mentioned makeup frames 2 and 3
Are elastically fitted and attached to these fixing fittings 11. A long frame is used as the decorative frame 2, and the decorative frame 3 has a short length corresponding to the arrangement interval of the decorative frames 2.

Next, the structure of each part of the above sound absorbing wall device, that is, the sound absorbing ceiling device will be described. 3 to 5 show the configurations of the above-described mounting metal fitting 10 and fixing metal fitting 11. The mounting bracket 10 is formed, for example, by bending a metal plate such as a stainless steel plate into a substantially U-shape, and its inner width is formed so as to be in close contact with both side surfaces of the lower frame member. There is. A pair of cut-and-raised portions 21 are formed at the lower portions of the side wall portions 10a of the mounting member 10 so as to project inward. Further, a pair of locking cut-and-raised pieces 22 are formed on the upper portions of both side wall portions 10a. These locking cut-and-raised pieces 22 have a tongue shape in which both side wall portions are punched out in a U shape, and in the initial state, as shown by the solid line in FIG. It is only necessary to punch out the piece 22, for example, it bulges inward slightly larger than the plate thickness of the fitting 10.

Such a mounting member 10 is fitted into the plate frame member 6 from below. In this case, the above-mentioned cut-and-raised portion 2
1 contacts the lower surface of the lower frame member 6 described above. After that, the locking cut-and-raised piece 22 is bent inward with a tool such as a screwdriver as shown by the chain double-dashed line in FIG. Therefore, these locking cut-and-raised pieces 22 engage with the upper surface of the lower frame member 6. As a result, the fitting 10 can be easily attached to any position on the lower frame member 6. Further, a plurality of, for example, three screw holes 23 are formed in the bottom wall portion 10b of the fitting 10.

The fixing member 11 is formed by press-molding a stainless steel plate as shown in FIG. 3, and has a rectangular flat plate-shaped main body 25. A pair of fitting portions 26 are integrally projected from both end portions of the main body portion 25, and a fitting portion 27 is integrally projected from one side surface portion. These fitting portions 26 and 27 have a pair of claw portions, and these claw portions are bent into a shape that spreads downward. Further, a mounting hole 27 is formed in the body portion 25 so as to correspond to the screw hole 23 of the mounting member 10.

The fixing metal fitting 11 as described above abuts the lower surface of the mounting metal fitting 10, penetrates the mounting hole 28, and the screw 29 is screwed into the screw hole 23 of the mounting metal fitting 10. It is attached by a screw 29. Further, as shown in FIG.
And the above-mentioned decorative plate 1 between the bottom surface of the mounting bracket 10 and
The corners of the flange portion 1a are clamped, so that the decorative plate 1 is attached to the lower frame member 6.

The decorative frames 2 and 3 are formed by bending a stainless steel plate into a gutter shape having a substantially U-shaped cross section as shown in FIGS. 4 and 5, and the upper part thereof has a narrow interval. So that it is folded inward. And these decorative frames 2 and 3 are the fitting parts 26 and 2 of the said fixing metal fitting 11.
7 is elastically fitted and attached. It should be noted that one long decorative plate frame 2 is fitted and attached to the engaging portion 27 on one side surface of the fixing bracket 11, and the other short decorative frame 3 has both ends thereof fixed by the fixing brackets. The fitting portions 26 at both ends of 11 are fitted and attached. These decorative frames 2 and 3 conceal the mounting portions of the edge of the decorative plate 1, that is, the portions of the fixing metal fitting 11 and the mounting metal fitting 10 described above, so that the appearance is improved.

The width of the decorative frames 2 and 3 is narrower than the distance between the side surfaces of the adjacent decorative plates 1. Therefore, as shown in FIG. 5, in the portions other than the portions of the mounting bracket 10 and the fixing bracket 11, the gaps 30 are formed between the side surfaces of the decorative frames 2 and 3 and the side surface of the adjacent decorative plate 1. Has been formed. A gap is also formed between the upper edges of the decorative frames 2 and 3 and the lower surface of the flange portion 1 a of the decorative plate 1. A gap 31 is also formed between the leading edges of the flanges 1a of the adjacent decorative plates 1. Further, since the cut-and-raised portions 21 formed on the lower portions of both side wall portions of the above-described mounting member 10 are in contact with the lower surface of the lower frame member 6, the bottom wall portion of this mounting member 10 and the lower frame member 6 are There is a gap between the bottom surface, and as shown in FIG.
A gap is also formed between the upper surface of the flange portion 1 a of the decorative plate 1 and the lower surface of the lower frame member 6. Therefore, the space on the upper side of the decorative plate 1, that is, the space on the back side, and the space on the lower side of the decorative plate 1, that is, the space on the indoor side, communicate with each other via the communication path constituted by the above-described gap.

The sound absorbing plate member 5 is constructed as shown in FIGS. 6 and 7. That is, the sound absorbing plate member 5 is formed of a porous material in which particles of a ceramic material are bound by a binder as described above. In this embodiment, alumina-based mullite particles are used as the ceramic particles, and the particle diameter is, for example, 0.5 mm.
To 1.0 mm are used. As the binder, for example, an epoxy adhesive is used.

Further, in this embodiment, a reinforcing wire net 41 is embedded in a main body portion 40 made of a material obtained by binding such ceramic particles with a binder. As the wire net 41, for example, as shown in FIG. 6, an aluminum wire rod formed into a corrugated shape and joined is used. Then, such a wire net 41 is placed in a mold (not shown) for molding the sound absorbing plate member 5, and the above-mentioned mixture of the ceramic particles and the binder is filled therein and compressed by a press. And heat to cure the binder. When manufactured by such a method, as shown in FIG. 7, the material in which the ceramic particles and the binder are mixed enters the inside of the mesh of the wire net 41, and the wire mesh is integrally embedded in the main body member 40.

Since such a sound absorbing plate member 5 is reinforced by the metal net 41, it has high strength and does not crack.
Further, since the mesh portion of the wire net 41 is a void, even if the wire net 41 is embedded, the sound absorbing effect of the sound absorbing plate member 5 is hardly reduced. Further, the main body portion 40 made of a material obtained by binding such ceramic particles with a binder.
Has high heat resistance, nonflammability, and high fire resistance.
Further, such a material has an advantage that it can obtain an arbitrary sound absorbing property by changing the diameter, porosity and other properties of the ceramic particles.

For example, FIG. 11 shows the results of measuring the sound absorption characteristics of the sound absorbing plate member of this embodiment by the reverberation chamber method. As shown in FIG. 11, this sound absorbing plate member exhibits flat sound absorbing characteristics over a wide frequency range. This embodiment is suitable for a sound absorbing ceiling device in a conference room, for example. That is, this embodiment is capable of efficiently absorbing noise in a wide range of frequencies, and has a flat sound absorption coefficient for each frequency, so that it is a synthesized sound of a plurality of frequencies. The tone of your voice does not change or it becomes difficult to hear.

It should be noted that such sound absorbing characteristics should be set in accordance with the purpose of use of the sound absorbing wall device.
The sound absorbing plate member formed of the material in which the ceramic particles are bound with the binder has the sound absorbing characteristic set to an arbitrary characteristic as described above by appropriately setting the diameter and the porosity of the ceramic particles as described above. There is an advantage that it can be easily set.

Incidentally, FIG. 12 shows the sound absorbing characteristics of the sound absorbing material of rock wool as conventionally used. As is clear from FIG. 11, such a material exhibits a characteristic that the sound absorption coefficient increases as the frequency increases, and the sound absorption plate member has a flat sound absorption like a sound absorbing plate member in which the above-mentioned ceramic particles are bound by a binder. The characteristics cannot be obtained, and it is difficult to set the sound absorption characteristics to arbitrary characteristics.

Since the sound absorbing plate member 5 made of the porous material obtained by binding the above ceramic particles with the binder is used in the above-mentioned embodiments, the sound absorbing characteristics as described above are excellent. And there are many advantages.

That is, in such a sound absorbing ceiling device, a space is formed between the decorative plate 1 and the ceiling wall of the body of the building. When the temperature of the room in which the ceiling device is installed rises, the air in the space expands, and when the temperature of the room drops, the air in the space contracts. Therefore, with the expansion and contraction of air in this space,
This air flows out into the room, and the room air flows into this space.

The sound absorbing plate member 5 is made of a porous material as described above, but has a large air flow resistance, and when air flows through the sound absorbing plate member 5,
There is great resistance. On the other hand, the space between the decorative plate 1 and the ceiling wall is provided with the gaps 30, 31 as shown in FIG.
It communicates with the room through such a communication passage. Therefore, the air in this space flows out into the room through the communication passage formed of these gaps 30 and 31, or flows into the space from the room through this communication passage, and the small holes of the decorative plate 1 described above. 4 and the sound absorbing plate member 5 do not flow through. Therefore, static electricity is not generated in the decorative plate 1 and the sound absorbing plate member 5 due to the circulation of the air, and dust is not adsorbed on the edges of the small holes 4 of the decorative plate 1 to impair the appearance.

Further, since the sound absorbing plate member 5 has a sufficient sound absorbing action even if the plate thickness thereof is thin, the thickness of the entire sound absorbing ceiling device can be reduced. Further, the sound absorbing plate member 5 has a rigid plate shape, and it is sufficient to cut it to a predetermined size and dispose it on the back surface side of the decorative plate 1, and the construction is easy.

Further, since the sound absorbing plate member 5 is made of a material in which ceramic particles are bound with a binder,
Even if the ceramic particles are exfoliated, they do not float in the air. Therefore, unlike the conventional case where rock wool is used as a sound absorbing material, small pieces of fibers do not float in the air and have a bad effect on the human body.

The present invention is not limited to the above embodiment. For example, FIG. 8 shows the sound absorbing plate member 5 of the second embodiment.
The structure of a is shown. In this embodiment, the sound absorbing plate member 5a is reinforced by attaching sheets 42 of a porous material to both sides of the material 40a obtained by binding the above ceramic particles with a binder. This sheet 42
For example, inorganic fibers or other materials are used. In such a case, the sheet as described above is laid inside a mold for molding the material 40a in which the above-mentioned ceramic particles are bound with a binder, and the material obtained by mixing the ceramic particles and the binder is filled on the sheet, and It can be manufactured by stacking another sheet from above and compressing and heating the mold.

In the second embodiment, this sheet 4 is used.
2 can reinforce the sound absorbing plate member 5a, and even if the ceramic particles are exfoliated, the ceramic particles are held by the sheet 42,
There is an advantage that it does not fall into the room through the small holes 4 of the decorative plate 1.

FIG. 9 shows the sound absorbing plate member 5b of the third embodiment. In this case, a material 40b obtained by binding the above-mentioned ceramic particles with a binder is contained in a bag body 44 formed of a sheet 43 made of the above-mentioned porous material. Also in this embodiment, the second
In the same manner as in the embodiment of 1., even if the ceramic particles are exfoliated from the material 40b, the particles are retained in the bag body 44, and the ceramic particles enter the room through the small holes 4 of the decorative plate 1. It never falls.

Further, FIG. 10 shows a sound absorbing plate member 5c of the fourth embodiment. This is one in which a material 40c obtained by binding the above ceramic particles with a binder is wrapped with two sheets 45 and 46 made of the above porous material. That is, the edge of one sheet 45 wraps around the edge of this material 40c, and the edge of the other sheet 46 overlaps the edge of this one sheet 45 to wrap around the edge of this material 40c. I'm out. The edges of the sheets 45 and 46 are fixed by an adhesive, an adhesive tape or other means.

Furthermore, the present invention is not limited to the above embodiments. For example, the present invention is not limited to the sound absorbing ceiling device as described above, but can be applied to sound absorbing wall devices in general such as a sound absorbing side wall device installed on a side wall of a room or a space.
In this case, a mechanism for fixing the sound absorbing plate member to the back side of the decorative plate may be added. Further, the sound absorbing wall device of the present invention can be installed on a curved side wall, a ceiling or the like by forming a frame member, a decorative plate, a sound absorbing plate member, etc. in a curved shape.

[0041]

As described above, according to the present invention, a desired sound absorbing characteristic can be obtained by appropriately setting the diameter and the porosity of the ceramic particles of the sound absorbing plate member made of the porous material in which the ceramic particles are bound by the binder. It is possible to provide a sound absorbing wall device having good performance. Further, such a sound absorbing plate member has extremely high air resistance when air permeates, and since the space between the decorative plate and the wall surface of the building communicates with the room through the communication passage, Even if the air in the space expands and contracts, the air does not flow through the small holes of the sound absorbing plate member or the decorative plate. Therefore, static electricity is generated in the sound absorbing plate member and the decorative plate due to such permeation and circulation of air, and dust is not adsorbed on the edges of the small holes of the decorative plate to impair the appearance. Further, since the sound absorbing plate member is made of a material in which ceramic particles are bound with a binder, even if the ceramic particles are exfoliated, the particles do not float in the room. Therefore, unlike the conventional sound absorbing wall device using rock wool or the like as a sound absorbing material, these fibers do not float in the room and do not adversely affect the human body. Further, since this sound absorbing plate member is in the shape of a rigid plate, it is easy to install and the effect is great.

[Brief description of drawings]

FIG. 1 is a plan view of a sound absorbing ceiling device according to a first embodiment of the present invention viewed from below.

FIG. 2 is an exploded perspective view of a part of the first embodiment.

FIG. 3 is an exploded perspective view of a mounting member and a fixing member according to the first embodiment.

FIG. 4 is a sectional view taken along line 4-4 of FIG.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a plan view of a part of the sound absorbing plate member of the first embodiment.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is a sectional view of a sound absorbing plate member according to a second embodiment.

FIG. 9 is a sectional view of a sound absorbing plate member according to a third embodiment.

FIG. 10 is a sectional view of a sound absorbing plate member according to a fourth embodiment.

FIG. 11 is a diagram showing sound absorbing characteristics of the sound absorbing plate member according to the embodiment of the present invention.

FIG. 12 is a diagram showing sound absorbing characteristics of a conventional rock wool sound absorbing material.

[Explanation of symbols]

 1 ... Decorative plate 2, 3 ... Decorative frame 4 ... Small hole 5 ... Sound absorbing plate member 6 ... Lower frame material 7 ... Upper frame material 10 ... Mounting metal fitting 11 ... Fixing metal fitting 30, 31 ... Gap (flow passage) 40 ... Main body part 41 ... Wire mesh

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location G10K 11/16 A 7406-5H

Claims (5)

[Claims] 1. A sound absorbing wall comprising a frame member, a porous decorative plate supported by the frame member, and a sound absorbing plate member arranged on the back surface side of the decorative plate, wherein the sound absorbing plate member is A sound absorbing wall device, characterized in that it is formed of a porous material in which ceramic particles are bound with a binder, and that a communication passage that connects the space on the back side of the decorative plate member and the room is formed. 2. A decorative frame is disposed between the decorative plates, the decorative frame conceals an attachment portion of an edge portion of the decorative plate, and a gap is provided between the decorative frame and the decorative plate. 2. The sound absorbing wall device according to claim 1, wherein a gap is formed in the communication passage. 3. The sound absorbing plate member includes a main body made of a material in which ceramic particles are bound with a binder, and a reinforcing wire mesh member embedded in the main body. The sound absorbing wall device according to claim 1. 4. The sound absorbing plate member is composed of a body portion made of a material in which ceramic particles are bound with a binder, and a reinforcing porous sheet attached to both side surfaces of the body portion. The sound absorbing wall member according to claim 1. 5. The sound absorbing plate member comprises a main body made of a material in which ceramic particles are bound with a binder, and a bag body made of a porous material that wraps the main body. The sound absorbing wall device according to claim 1.