JPS649421B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an architectural panel that has high sound absorption performance and excellent sound insulation performance in the low frequency range, and that can be prefabricated as a ready-made rigid body. .

[Prior Art] Partition wall materials or door materials for theaters, music halls, listening rooms, etc. have a material that absorbs sound and has a function that prevents the absorbed sound from leaking to the outside. Must have. In order to exhibit such a function, conventionally, a wall body having a structure as shown in FIG. 8, for example, has been constructed each time by on-site construction. That is, a lattice-shaped frame 1 is made as a base material, an air layer 2 is formed within the wall by this frame, and then a relatively thick rock wool board or glass wool is covered to cover this air layer 2. After installing the board 3 and placing a perforated gypsum cement board 4 on top of the board,
In practice, the surface of the cement board was given a finishing touch by pasting a decorative cloth 5 or the like.

By the way, as is well known, various types of prefabricated architectural panels have been known, but one that has both sound absorbing and sound insulating properties has not yet been known. The inventor previously applied for patent application No. 59-182835.
No. 61-60946), we proposed a prefabricated panel with excellent sound insulation properties under the name "panel structure with sound insulation", but this panel had excellent sound insulation properties. Although it exhibits sound insulation properties, it has poor sound absorption properties, so it cannot be used as is for the above purposes.

[Problems to be Solved by the Invention] Here, the present invention has both sound absorption and sound insulation properties, and does not require construction on site, and can be brought to the site as is as a prefabricated panel. The aim was to obtain a new architectural panel that could be installed and completed by simply pasting on a decorative cloth.

[Means for Solving the Problems] The present invention provides a plate-like material having a predetermined area, which is made by aligning fibrous materials such as glass wool and rock wool so that the longitudinal direction of the fibers is perpendicular to the panel surface. A fibrous layer processed into a raw material and a rib structure or cell structure as a structure having an air layer are arranged so that the rib opening surface or cell opening surface thereof faces the surface of the fibrous layer. In other words, the main body of the panel is composed of a laminate of at least the fibrous layer and the air layer structure, and the two are bonded together via a face material that does not affect the propagation of sound. For panels consisting of
The above objective can be achieved by providing an outer panel without holes on one side of this panel and an outer panel with through holes with an aperture ratio of 20% or more on the other side. This is what I did.

[Example] Figure 1 is a sectional view showing an example of the sound insulation panel of the present invention, in which reference numeral 11 is a rock wool layer with a thickness of 12 mm, and the direction in which the rock wool fibers are aligned is determined by the thickness of the layer. It is oriented parallel to the width direction, in other words, perpendicular to the surface direction, and therefore has extremely high strength in the thickness direction. The density of this rock wool layer is 200Kg/ ^m3 . This rock wool layer 1
A face material 12 made of noncombustible paper with a weight of 400 g/m ² is attached to both sides of the face material 1 using an appropriate adhesive, and then a cell structure 13 made of a paper honeycomb core, a roll core of the same, etc. is attached to the surface of this face material. Stack them. This cell structure is arranged so that the cell opening faces face the face material 12 as shown in the figure. It is also preferred, but not essential, that the cell structure be non-flammable. Further, on one exposed surface of the cell structure, an outer panel 14 made of, for example, a 0.8 mm thick galvanized steel plate is adhered, and on the other exposed surface, an outer panel 15 made of the same material and having the following configuration is bonded.
Stack them. That is, 1 for the outer panel 15
Attach mmφ through holes 16 with a pitch of 2 mm to make the entire panel 40 mm thick. By the way, the overall areal density of this panel is 17Kg/ ^m2 .
When actually forming a wall of an acoustic room or the like using the above-mentioned panel, the outer panel 15 having the through-holes is erected so that it is placed on the indoor side, and then the surface of this outer panel is coated with the structure shown in FIG. Finish by pasting a breathable makeup cloth indicated by reference numeral 17. Non-breathable materials such as vinyl cloth are not allowed, but any other type of cloth can be used.

Figure 2 shows a front view of the panel before pasting the cloth 17, and the through holes indicated by the dashed line indicated by the reference numeral 18 in the figure may be affected by sound propagation depending on the material of the face material, as described later. We have shown cases where it is necessary to drill this hole due to the following. Reference numeral 19 denotes a steel frame attached to the four peripheries of the panel plate, and indicates a case where the panel itself is used, for example, as a door material. As is clear from the following explanation, the panel of the present invention has high rigidity, so the frame body need only be used when it is necessary to support the panel as a whole, and the panel itself has a high rigidity. There is no need to provide a member specifically for reinforcing in the direction.

3 and 4 are cross-sectional views of panels showing other embodiments of the present invention, in which the cell structure 13 described above is used as the core material, and rock wool layers are formed on both sides of the core material through the face materials 12. Or an example in which a fibrous layer 11 such as a glass wool layer is provided,
Furthermore, examples are shown in which the fibrous layer 11 and the cell structure 13 are laminated so as to face each other with the facing material 12 in between, and in either case, one side of the panel has rigid holes. A blank outer panel 14 is integrally attached to the other surface, and an outer panel 15 having a through hole 16 is attached to the other surface.

FIG. 5 shows an example in which a rib structure 21 is used in place of the cell structure described above, and this rib structure is, for example, made integrally with plasterboard, iron or aluminum alloy, etc. is laminated with a fibrous layer 11 as described later. That is, a rib structure 21 having a large number of ribs 20 protruding in the thickness direction (when the ribs 20 are viewed in plan, the ribs may be in a grid shape or in a comb-like shape) is attached to both sides of the panel. , and the fibrous layer 11 is laminated in the shape of a sandwich sandwich with a face material 12 interposed therebetween. In the present invention, it is required that a through hole 16 with an aperture ratio of 20% or more be formed on one side of the rib structure 21 located on both sides of the panel.

The reason why the aperture ratio is set to 20% or more is because if it is less than that, there will be a problem with the propagation of sound, and if it is more than 20%, the sound will propagate inside without being reflected on the panel surface. be done.

The density of the fibers constituting the fibrous layer 11 is preferably 80 to 250 kg/m ³ , and the surface material 12 can be made of any material such as Japanese paper, nonwoven fabric, plywood, steel plate, synthetic resin plate, etc. However, it is best to choose one that has as little effect on sound propagation as possible.
In other words, a thin material with a low areal density is preferable, and thin paper, nonwoven fabric, glass woven fabric, polyethylene film of about 60 μm, etc. can be used without particularly providing through holes. On the other hand, when using a material that hardly transmits acoustic energy, such as a steel plate, the aperture ratio should be 20% or more with respect to the face material 12, as shown by reference numeral 18 in Fig. 2, for the reasons mentioned above. A through hole 18 must be drilled in the hole. By configuring the panel in this manner, the present invention aims to attenuate sound by making the entire inside of the panel a sound absorbing area.

[Operations and Effects] First, the sound absorption characteristics of the panel according to the present invention will be specifically shown in comparison with the panel according to the prior application, as shown in FIG. In other words, with the configuration shown in Figure 1,
And the surface material 12 is 400g/ ^m2 non-combustible paper with 3mm
The panel of the present invention has the same configuration as explained based on the same figure except that the through holes 18 of φ are formed at a pitch of 5 mm, and the panel of the present invention has the structure shown in FIG. 1 where the through holes 16 are not formed on the panel surface. The sound absorption coefficient was measured using the reverberation room method in accordance with JIS A 1409. The results are as shown in the same figure, showing a high sound absorption coefficient in a wide frequency range, and exhibiting sound absorption characteristics not seen in the panel of the previous application. As described above, the panel of the present invention has extremely good sound absorption characteristics when the outer panel 15 having the through holes 16 is placed on the sound source side, and therefore, most of the acoustic energy from the external sound source is absorbed through the outer panel 15. It passes through and is absorbed into the panel. However, the present invention has a structure that can attenuate the acoustic energy absorbed in this way as much as possible. 11 or a rib structure 18, and furthermore, a fibrous layer 11 having a different impedance from the air layer with respect to sound propagation is laminated, and the fibers constituting the fibrous layer 11 exhibiting a sound absorbing function. The direction of alignment of the pine or felt fibers is not parallel to the surface direction of the panel, but is perpendicular to the surface direction (arrayed in the thickness direction), so the acoustics when the direction of alignment is parallel is A kind of air spring-like action, which is a mechanical action, does not occur. To be more specific, since the aforementioned fibrous layer acts as a kind of rigid body with respect to sound propagation, as is clear from the graph, its characteristic value protrudes below the mass law value, so-called resonance. Transmission phenomenon can be prevented. Moreover, even though the product has an areal density of 17Kg/ ^m2 , its sound insulation properties demonstrate excellent sound insulation performance, with a sound transmission loss that is nearly four times that amount in line with the mass law over the entire sound range. That's what I do.

In this way, the panel of the present invention has a transmission loss of 20 dB not only in the high frequency range but also in the low frequency range below 500Hz.
As mentioned above, it has an excellent sound insulation effect that is not seen in conventional types.

Furthermore, according to the present invention, as mentioned above, for example, in the case of doors or walls behind the audience seats in a theater etc., reflection of sound is not desirable, and all the sounds that reach there are from this. Although it is desirable to absorb the Moreover, conventionally, structures that perform such functions were constructed on-site, but according to the present invention, panel bodies that perform the same functions can be supplied in a so-called prefabricated state. Therefore, the above-mentioned on-site work can be omitted, and the on-site work can simply be done by pasting the cloth on the panel surface, so the work efficiency is greatly improved.

In addition, the rigidity, which is essential for architectural panels, and the workability in the processing stage are significantly improved. First, the fibrous layer, which is a component of the present invention, has fibers oriented in the thickness direction, so it has an extremely high compressive modulus of elasticity, so it not only has excellent compressive strength, but also has excellent compressive strength. In addition, it saves the effort of processing only the fibrous layer into an independent structure, which was essential in the conventional method, and as mentioned above, the compressive strength is significantly improved, so the face material can be attached to the surface of the fibrous layer. Even in this case, high adhesive strength can be obtained. In particular, in the past, it was necessary to separate the fibrous layer and the cell structure to be laminated thereon into separate panels, and then combine the two with bolts or nuts, etc., but the present invention eliminates these steps. This also has the effect of saving labor in production.

[Brief explanation of drawings]

Fig. 1 is a partially enlarged sectional view of a panel showing an embodiment of the present invention, Fig. 2 is a plan view of the same panel with a part cut away and the cloth on the surface removed, and Figs. The figure is a sectional view showing another embodiment.
The figure is a cross-sectional view of a panel showing another embodiment of the present invention, Figure 6 is a graph comparing the panel of the present invention and the panel of the prior application and specifically showing the difference in sound absorption effect, and Figure 7 is a graph showing the difference in sound absorption effect. Similarly, FIG. 8 is a graph specifically showing the sound insulation effect according to the value of sound transmission loss, and is a sectional view showing a conventional sound absorbing wall body. DESCRIPTION OF SYMBOLS 11... Fibrous layer, 12... Surface material, 13... Cell structure, 14... Outer panel without holes, 15... Outer panel with holes, 16... Through holes, 17... Cosmetic material Cross, 18... Through hole in face material, 19... Frame, 20...
...Rib, 21...Rib structure.

[Claims]

1 A fibrous layer made of fibers of a fibrous material such as glass wool or rock wool aligned so that the length direction thereof is perpendicular to the panel surface, and a structure having an air layer are laminated, and both are laminated. A suitable outer panel is bonded to the surface of the structure having the fibrous layer or the air layer after bonding through a surface material that does not affect the propagation of sound. Panel structure with sound insulation properties. 2. Sound insulation according to claim 1, in which a cell structure such as a roll core or a honeycomb core is arranged and used so that the cell opening face faces the fibrous layer as the structure having an air layer. Panel structure with. 3. A panel structure having sound insulation properties according to claim 1, which uses a rib structure having ribs in the thickness direction of the panel as the structure having an air layer. 4. A fibrous layer made of glass wool, rock wool, or other fibrous material aligned so that the length direction of the fibers is perpendicular to the panel surface is used as the core material, and both sides of this core material are covered with non-perforated non-combustible paper or Any one of claims 1 to 3, wherein structures having an air layer are adhered to each other via a nonwoven fabric, and a rigid outer plate is attached to the surface of each structure.

Claims (1)

A panel structure having sound insulation properties according to any one of claims 1 to 3.