JP2002070201A - Sound absorbing building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sound absorbing building material having a structure which can be coated easily with a certain plane substance and finished, of which a sound absorbing porous concrete panel is coated with the certain plane substance without losing its sound absorbing characteristic. SOLUTION: A sound absorbing building material 1 is made of a sound absorbing porous concrete panel 2 on which a face is coated by a plane substance 6 that does not practically damage sound absorbing characteristic of the porous concrete panel. For the plane substance 6, a secondary square plane substance 11 for coating a surface 3 is used in the same way as a primary square plane substance 8 for coating a rear surface 4 of the porous concrete panel 2. Parts near edges of these plane substances 6, 8 are bent and covered together on an end surface 5 of the porous concrete panel 2. Then a dust caused by the characteristic of a porous concrete does not go out of the porous building material 1, whereby the above dust does not float in the air even if the porous building material is used as an interior building material contacting with air flow.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing building material mainly composed of a porous concrete panel having sound absorbing properties.

[0002]

2. Description of the Related Art Conventionally, various construction materials have been known as materials for absorbing the noise of buildings and roads. Among them, there is a porous concrete construction material (Japanese Patent Application Laid-Open No. 9-52778). Since this building material contains many continuous pores in which a plurality of small spherical pores are partially united, the performance of absorbing sound transmitted to the building material is very excellent.

[0003]

However, when this building material is used as it is as a sound absorbing wall of a factory requiring clean air, such as a precision machine, a film, a semiconductor, etc., it exhibits excellent sound absorbing characteristics as expected. However, when the building material comes into contact with the airflow, dust resulting from the structure peculiar to the porous sound-absorbing building material may float and mix in the airflow. This is because the building material is obtained by cutting a large block of porous concrete having a good sound absorbing property into a thick plate-shaped body (panel) having an appropriate size. In the process, fine cutting chips enter the pores exposed in the panel and become powder in the process of being shipped as building material or assembling as a building wall, and come out on the surface of the panel, or the surface of the building material The porous openings that are exposed on the surface of the panel are chipped and become powder, and similarly adhere to the surface of the panel. This is because when such a building material is built in a building as a sound absorbing material and it comes into contact with an air flow, the powder may float on the air flow (problem of the prior art).

[0004] The present inventors have conducted intensive studies to propose a sound-absorbing building material that can solve the problems of the prior art.
The fact that the surface of the porous concrete panel having sound absorbing properties may be covered with a specific planar body has been found, but in the case of a panel having a shape as a building material and a predetermined size and weight, 1 It was found that the porous concrete panel could not be rolled to cover the parcel by wrapping the parcel so as to wrap the parcel with the sheet, and it was found that the covering operation was very difficult. Accordingly, an object of the present invention is to provide a porous concrete panel having a sound-absorbing property, which can be easily coated on the surface of the porous concrete panel when the specific surface is coated without impairing the sound absorbing properties. It is to provide a structure.

[0005]

According to a first aspect of the present invention, there is provided a porous concrete panel having a sound absorbing property and at least one of its front and back surfaces. Means is to cover a planar body which does not substantially impair the sound absorbing properties of the porous concrete panel. According to a second aspect of the present invention, in order to more effectively solve the above-mentioned problem, the entire surface of the porous concrete panel having a sound absorbing property has a surface shape that does not substantially hinder the sound absorbing characteristics of the porous concrete panel. In the building material covering the body, while using a second rectangular planar body covering the back surface as well as the first one planar body covering the surface of the porous concrete panel, as the planar body, Means is employed in which the portion near the peripheral edge is bent to cover the small edge surface of the porous concrete panel in cooperation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the most preferred embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a sound-absorbing building material 1 according to the present invention has a sound-absorbing porous material. It is composed of two elements, a concrete panel 2 and a planar body 6 covering the front surface 3, the back surface 4 and the fore-edge surface 5.

The porous concrete panel 2, which is the main material of the sound absorbing building material 1, is 400 to 1600H.
Concrete-based panels having a normal incidence sound absorption coefficient of 0.5 or more in the frequency range of z are used, and preferably, panels having the following physical characteristics are used. That is, the bulk specific gravity containing a large number of substantially spherical pores is 0.2 to 0.5.
A plurality of adjacent pores of the pores are partially united to have continuous pores that are continuously connected to each other through communication holes formed between the pores. A porous concrete panel is used in which continuous pores are arranged in substantially the same direction.

[0008] Such a porous concrete panel 2
Is a semi-plasticized water slurry mainly composed of a siliceous raw material and a calcareous raw material by foaming and hardening in a mold in which a specific foaming agent, a thickener and a surfactant are present in a specific amount. Once the cured product is manufactured, the cured product is cut into a panel shape,
It is manufactured by steam curing the finally obtained panel under high temperature and high pressure, and by slicing the cured product in a specific direction in the process of cutting the cured product, the porous concrete panel has specific continuous pores. To hold. Therefore, the porous concrete panel 2 obtained in this way has a number of pores 7 mainly composed of the continuous pores opened on the surface thereof.

On the other hand, the planar body 6, which is a sub-material of the sound absorbing building material 1, is a fine hole having a size that does not substantially impair the sound absorbing property even if the surface of the porous concrete panel 2 is covered. A flat body having fine pores of a size that does not allow the powder which is supposed to adhere to the panel 2 to pass therethrough is used, and a transparent or opaque thickness preferably made of a synthetic resin such as polyethylene or polypropylene is used. 0.1 ~
It consists of a 0.5mm sheet, and the size of the hole is 1 ~ 1
30 ° and a material having a moisture permeability defined by JIS A 1324 of 0.01 to 0.40 are used. The pores in the above range allow gas molecules to pass, but water molecules are difficult to pass,
It is suitable for sound absorbing building materials for clean rooms that dislike extremely fine dust. In the above description, "substantially does not impair the sound absorption characteristics" means that the sound absorption according to the present invention is compared with the normal incidence sound absorption coefficient for each frequency (Hz) in the porous concrete panel 2 not covered with the planar body 6. Means that it does not decrease with a significant difference, for example not more than 15%.

[0010] Next, how to cover the surface of the porous concrete panel 2 with the planar body 6 will be described. As shown in FIG. A first one-sided planar body 8 having a square shape and an area larger than the front and back surfaces is prepared and spread on a horizontal plane. Then, the porous concrete panel 2 is placed on the first one-sided planar body 8 (only when the porous concrete panel 2 is moved in carrying out the present invention).

As shown in FIG. 3, an adhesive is previously applied to a part of the long side small surface 5x of the small side surface 5 of the porous concrete panel 2, and the adhesive corresponding to the long side small side surface 5x is formed. On the other hand, a portion near the peripheral portion of the shape-shaped body 8 is folded up at a right angle, and the portion is adhered to the long side edge surface 5x. Subsequently, the portion of the first planar body 8 protruding in a substantially U-shape from the short side small edge surface 5y is bent as shown in FIG. When the trapezoidal protruding piece 9 of the first one-sided planar body 8 that is still protruding outward from the fore-edge surface 5y is attached to the short-side fore-edge surface 5y, as shown in FIG. As shown, the first one-sided planar body 8 is deformed into a box shape without an upper lid, and the porous concrete panel 2 is almost completely of the first one-sided shape in a state where the porous concrete panel 2 is dropped therein. The sound absorbing building material 1 according to the first aspect of the present invention is covered with the planar body 8.

That is, if the flat body 6 is used in which the margin at the portion near the periphery of the first one-sided flat body 8 is adjusted to the short side width of the fore-edge surface 5, the back surface of the porous concrete panel 2 can be obtained. The fore-edge surface 4 of the peripheral surface 4 and 4 is completely covered by the first one-sided planar body 8. In addition, since the effect of the adhesive applied to the short side small face 5y does not reach the overlapping portion 9a formed by folding a part of the trapezoidal projecting piece 9, the side face from the top to the small face 5y, For example, by fastening the U-shaped fastening member 10 using a driving jig (not shown), the fastening of the trapezoidal projecting piece 9 to the short-side small-mouth surface 5y is ensured.

The porous concrete panel 2 covered with the planar body 6 leaving a part of the surface in this manner is coated on the back surface 4 covered with the planar body 6 as the sound-absorbing building material 1 (in the above description, as shown in FIG. Although the back side is mainly described in the description based on the above description, the front side 3 can be covered with the sheet body 6 in the same manner as described above, because in this type of panel, one side is the front side and the other side is the back side. When only the sound-absorbing building material 1 of this embodiment is assembled in a building (not shown) so as to come into contact with the airflow, the above-described object of the present invention can be solved.

However, when there is a risk that dust may be released from the surface 3 when the building material 1 is being transported, built, or shakes, or when the sound absorbing building material 1 is used as a partition between buildings, Thus, the planar body 6 is coated on the surface 3 of the porous concrete panel 2. That is, as shown in FIG.
A second rectangular planar body 11 having the same size and shape as the first planar body 8 is placed on the surface 3 of the porous concrete panel 2 covered with. However, in this case, the trapezoidal projecting piece 9 of the first one-sided planar body 8 is fastened to the short side face 5y by the fastening member 10.
There is no need to stop at.

After the adhesive is partially applied to the long side edge 5x of the porous concrete panel 2 and the bent portion of the first one-sided planar body 8 stuck thereon, FIG. As shown in the drawing, a portion of the second rectangular planar body 11 extending outward from above the long side edge surface 5x is folded down and attached to the edge surface 5x.

Then, as shown in FIG. 8, a portion of the second rectangular planar body 10 protruding in a substantially U-shape from the short side small edge surface 5y is bent, and a short adhesive which has been coated with an adhesive in advance. The second rectangular planar body 1 is attached to the side edge surface 5y.
0, when the trapezoidal projecting piece 12 that protrudes outward from the fore-edge surface 5y is pasted on the short-side fore-edge surface 5y, finally, as shown in FIG. Is deformed into a box shape without a bottom, and the surface 3 of the porous concrete panel 2 is covered with the
Is also covered by the second rectangular planar body 12, and the sound-absorbing building material 1 according to the second aspect of the present invention is obtained.

The effect of the adhesive applied to the short side face 5y is not exerted on the overlapping portion 12a formed by folding a part of the trapezoidal projecting piece 12, so that the first one-sided shape is formed on the overlapping portion 12a. The short side edge is formed by driving in a fastening member 10 having a U-shaped side surface with respect to the fore-edge surface 5y together with the trapezoidal projection piece 9 of the planar body 8 using a driving jig (not shown). The fastening of the trapezoidal projecting piece 12 to the surface 5y can be ensured.

In the process of covering the porous concrete panel 2 with the planar body 6 composed of the first planar body 8 and the second rectangular planar body 10, a relatively heavy and large panel is moved. A covering operation similar to a kind of packaging operation can be made more efficient by minimizing the upside-down moving operation. In addition, even if dust resulting from the porous concrete panel 2 may be emitted from the porous concrete panel 2 during the transportation thereof or during the building as a wall or a partition of the building, the sound absorbing building material 1 thus obtained may be used. Is covered with the planar body 6 which does not allow the dust to pass through, so that it stays in the planar body 6 and does not go outside. Also, after being built as a building material, the porous concrete panel 2
As described above, dust does not enter the air flow unless it encounters a very strong suction force even if it touches the air flow. Since the planar body 6 is made of a material having a thickness and a structure that does not substantially impair the sound absorbing performance, the sound absorbing building material 1 itself exhibits a specific function as a building material without deteriorating the sound absorbing performance.

The present invention can be carried out by modifying a part of the above-described embodiment without departing from the fundamental technical idea and not significantly impairing the effects of the invention. For example, when attaching the sound-absorbing building material 1 to a frame of a building, an unnecessary break portion is formed after partially breaking the planar body 5 and building it as a building material in order to form an insertion structure of a mounting bracket at a mounting portion. It can be closed by a shape. Further, the shape and size of the porous concrete panel 2 and the planar body 6 do not have to be strictly rectangular, and they can be changed as needed as long as the former can be covered.

[0020]

As described in detail above, the present invention provides a method for covering a porous concrete panel with a specific planar body without impairing the sound absorbing properties of the porous concrete panel having sound absorbing properties. An excellent effect of providing a coating structure that can be easily coated on the surface is exhibited.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a sound-absorbing building material according to the present invention.

FIG. 2 is a perspective view showing an initial stage of coating a porous concrete panel with a first planar member in a process of manufacturing a sound-absorbing building material according to the present invention.

FIG. 3 is a perspective view showing a stage in which the first planar member is partially folded up in the same process as above.

FIG. 4 is a perspective view showing a stage where most of the planar body is bent.

FIG. 5 is a partially cutaway perspective view showing another embodiment of the building material.

FIG. 6 is a perspective view showing an initial stage of coating a porous concrete panel with a second rectangular planar body in the process of manufacturing the sound-absorbing building material according to the present invention.

FIG. 7 is a perspective view showing a stage in which the second rectangular planar body is partially folded down in the same process as above.

FIG. 8 is a perspective view showing a stage where most of the planar body is bent.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sound-absorbing building material 2 porous concrete panel 3 front surface 4 back surface 5 fore-edge surface 6 planar body 8 first-side planar body 11 second rectangular planar body

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toru Asai 2035 Shioi-machi, Shioi-machi, Owariasahi-city, Aichi Prefecture F-term (reference) 2C001 Inc. CD01 CD02

Claims (3)

[Claims] 1. A porous concrete panel substantially corresponding to a front face (5) of a porous concrete panel (2) having a sound absorbing property and at least one of front and back faces (3, 4). Body (6) that does not impair the sound absorption characteristics
Sound absorbing building material coated with 2. A building material comprising a whole surface of a porous concrete panel (2) having a sound absorbing property coated with a planar body (6) which does not substantially impair the sound absorbing properties of the porous concrete panel. As the planar body (6), a first one-sided planar body (8) covering the back surface (4) of the porous concrete panel (2) and a second rectangular planar shape covering the front surface (3) as well. A sound-absorbing building material comprising a body (11) and a portion close to a peripheral edge thereof is bent to cover a small face (5) of the porous concrete panel (2) in a cooperative manner. 3. A sound-absorbing building material in which the entire surface of a porous concrete panel having a sound absorbing property is coated with a planar body (6) which does not substantially impair the sound absorbing properties of the porous concrete panel. .