JP2889065B2 - Two-layer roof with sound absorption performance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-layer roof having an extremely good sound absorbing performance and a sound absorbing performance capable of preventing dew condensation.

[0002]

2. Description of the Related Art Conventionally, Japanese Utility Model Publication No. 63-11228
In some cases, a waterproof sheet is heat-sealed.
The waterproof sheet was a plastic film type or asphalt roofing. Also in this case, it has a sound absorbing effect, but also has a low sound absorbing coefficient.

[0003]

Since the waterproof sheet is a burning material, it has a drawback that it cannot be used as a waterproof sheet because it is burned by welding sparks. However, there were drawbacks such as falling. Therefore, it is desired to solve these.
Further, it is also required to increase the sound absorption coefficient.

[0004]

Therefore, the inventor of the present invention has conducted intensive studies to solve the above-mentioned problems, and as a result, the present invention has been applied to an upper part of a lower-layer roof made of a lower-layer folded plate-like building plate. Laminate the upper roof consisting of the upper folded plate-like architectural plate with an interval, and drill a large number of small through holes in both the inclined portion and the bottom portion of the lower folded plate-like architectural plate. By adopting a two-layer roof having sound absorbing performance obtained by polymerizing a fibrous sheet having water repellency on the upper surface or the lower surface of the place, the sound absorbing effect can be increased, and dew condensation can be prevented, and the above problem has been solved. is there.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Symbol A is a lower roof,
The cross-sectional shape is of a type in which peaks 1 and bottoms 2 are alternately continuous.

[0006] As shown in Fig. 1, a lower-layer folded plate-like architectural plate A1 constituting the lower roof A has a folded-plate type roof in which an inclined portion 1a, a connecting bent portion 1b and a bottom portion 2 are alternately continuous. Often used. In the lower folded plate-like architectural plate A1, the connecting bent portions 1b, 1b of the adjacent lower folded plate-like architectural plates A1, A1,... Are connected to each other, and the mountain is formed by the two inclined portions 1a, 1a. A plurality of lower-layer folded plate-like architectural plates A1, A1,... Are connected to form a lower part roof A.

More specifically, in the case of a fitting type lower folded plate-like architectural plate A1, a cap material A2 is used, and as shown in FIG. A lower roof A is formed by fitting the cap material A2 on both side ends to form a mountain portion 1 and connecting adjacent lower folded plate-like architectural plates A1 and A1.

[0008] In addition, a low-rise folded plate-like building plate A
In the case of 1, as shown in FIG. 6 and FIG. 7, a recess is formed at one end of the connection bent portion 1b, and a top is formed at the end of the other connection bent portion 1b. The top portion is tightened, the mountain portion 1 is formed by the two inclined portions 1a, 1a, and the lower roof A to which the adjacent lower folded plate-like building plates A1, A1 are connected is constructed.

As another embodiment, as shown in FIGS. 8 and 9, in the case of a lower-layer folded plate-like architectural plate A1 of the polymerization type, one of the elliptical connecting bent portions 1b is connected to the other. The coupling bent portion 1b having an O-shape is fixed by polymerization, and both inclined portions 1a,
1a form a mountain 1 and a lower roof A to which adjacent lower-layer folded plate-like architectural plates A1, A1 are connected is constructed.

In the lower roof A, as shown in FIG. 1, a plurality of metal fittings 5, 5... Are fixed at predetermined intervals to a structural member 4 arranged on the main beam, and the metal fittings 5, 5. The lower folded plate-like architectural plates A1, A1,... Are arranged and fixed thereon.

As shown in FIG. 5, there is an embodiment in which the lower roof A is constructed horizontally or constructed with a gentle or steep slope.

A number of small through holes 3, 3,... Are formed in the bottom part 2 and the inclined part 1a of the lower folded plate-like building plate A1 constituting the lower roof A. In the embodiment, the diameter of the small through hole 3 is formed to be about 5 mm to 10 mm.

Further, the upper surface of the lower folded plate-like architectural plate A1 so as to cover a large number of small through holes 3, 3,... Of the inclined portions 1a, 1a and a large number of small through holes 3, 3,. Alternatively, the water-repellent fibrous sheet 6 is polymerized on the lower surface. Specifically, the periphery of the small through-holes 3, 3,... Is simply polymerized, and is applied to a portion other than the hole with an appropriate adhesive.

The fibrous sheet 6 is a woven fabric, nonwoven fabric, non-combustible paper, or the like having air permeability. These materials have a property of allowing water but not moisture (water vapor) to pass. As an example of the fibrous sheet 6 in the present invention, a water-repellent glass cloth is used, which has a property of impervious to water but of moisture (steam).

Even if the fibrous sheet 6 is polymerized so as to cover the small through holes 3, 3,..., The fibrous sheet 6 still has air permeability, allows moisture (steam) to pass through, and Lower layer folded plate-like building plate A with water vapor with small through holes 3,3, ...
Even when the water-repellent glass cloth penetrates into the lower roof A through the perforated portions (small through holes 3, 3,...) And the water-repellent glass cloth, the water-repellent glass cloth has air permeability, and thus releases the water vapor that has entered once. To reduce internal condensation. In addition, by having breathability, it also has a performance of absorbing a sound source.

On the lower roof A to which the lower folded plate-like architectural plate A1 is connected, an upper layer made of upper folded plate-like architectural plates B1, B1,... A roof B is provided. The configuration of the upper-layer folded plate-like architectural plate B1 is the same as that of the lower-layer folded plate-like architectural plate A1, except that small through holes 3, 3,... Are not provided. Use the same subscript in this case.

As described above, as an embodiment of the lower roof A and the upper roof B, both are of a fitting type (see FIG. 1), the upper roof B is of a fitting type, and the lower roof A is of a tight type. (See FIG. 6), both are of a closed type (see FIG. 7), both are of a superposed type (see FIG. 8), the upper roof B is a fitting type, and the lower roof A is a superposed type. (See FIG. 9).

A heat insulating material 7 such as a foamed synthetic resin is interposed between the lower roof A and the upper roof B. The lower roof A and the upper roof B are securely fixed by the connecting tool 8. As the connecting member 8, a suitable one is used depending on the type such as a fitting type, a tightening type, and a polymerization type.

In the experimental examples, the comparison results of the sound absorption coefficient when the water-repellent glass cloth (as an example of the fibrous sheet 6) and the 10 μm polyethylene film on the back surface of the water-repellent glass cloth are shown in the attached document. As shown in FIG. That is, when a waterproof sheet (here, a 10 μm polyethylene film is shown) is provided on the back surface (see the black circle line graph), the sound absorption coefficient is significantly reduced, but on the contrary, water-repellent glass cloth (as an example of the fibrous sheet 6) The sound absorption coefficient of only the sample (see the white circle line graph) is a very good value because of the air permeability. In the experimental example, the frequency is 250H
The average value (NRC) of z, 500 Hz, 1000 Hz, and 2000 Hz has a large difference of 0.5.

[0020]

According to the first aspect of the present invention, the upper folded plate-like architectural plates B1, B1,... Are provided at an appropriate interval above the lower roof A composed of the lower folded plate-like architectural plates A1, A1,. , And a large number of small through holes 3, 3,... Are formed in the inclined portion 1a and the bottom portion 2 of the lower-layer folded plate-like architectural plate A1, and the inclined portion 1a and the bottom portion 2 are formed. By adopting a two-layered roof having sound absorbing performance obtained by polymerizing a fibrous sheet 6 having water repellency on the upper surface or lower surface, firstly, it has excellent sound absorbing performance,
Secondly, there is an effect that dew condensation can be prevented, and thirdly, the structure can be provided simply and inexpensively.

These effects will be described in detail.
In conventional technologies such as a two-layer roof in which a small through hole is drilled and a synthetic resin film is superimposed on it, the generated sound is reflected by the synthetic resin film, so the sound absorption efficiency is relatively poor. was there. However, in the present invention, the air circulation is performed at three small through-holes by polymerizing the water-repellent fibrous sheet 6 on the upper surface or the lower surface of the inclined portion 1a and the two bottom portions, and at the same time, the indoor sound source Also, it passes through the fibrous sheet 6 from the three small through-holes and penetrates into the two-layered roof, so that the sound absorbing action is performed, so that the sound can be absorbed very well and the reverberation sound in the room can be minimized.

Further, in the present invention, since air is circulated from the three small through holes through the fibrous sheet 6, the moisture trapped in the two-layer roof can also be discharged to the indoor side. The moisture and the like can also penetrate into the two-story roof, and as a result, there is an advantage that dew condensation in the two-story roof can be prevented.

Further, the present invention has a simple structure in which the fibrous sheet 6 is simply polymerized, has a simple structure, and can be provided at a relatively low cost.

If the fibrous sheet 6 is formed of a water-repellent glass cloth, not only does it have a soundproofing effect, but also because it is a non-combustible material, there is no need to worry about them and it is advantageous in terms of fire protection. .

[Brief description of the drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is a perspective view of a lower folded plate-like architectural plate.

FIG. 3 is a sectional view of a lower-layer folded plate-like architectural plate with a fibrous sheet.

FIG. 4 is a cross-sectional view of a lower-layer folded plate-like architectural plate with a fibrous sheet.

5A is a cross-sectional view of a main part of a lower-layer folded plate-like architectural plate with a fibrous sheet, and FIG. 5B is a cross-sectional view of a main part of a lower-layer folded plate-like architectural plate with a fibrous sheet.

FIG. 6 is a cross-sectional view of another embodiment of the present invention.

FIG. 7 is a cross-sectional view of another embodiment of the present invention.

FIG. 8 is a cross-sectional view of another embodiment of the present invention.

FIG. 9 is a cross-sectional view of another embodiment of the present invention.

FIG. 10 is a graph showing characteristics of sound absorption coefficient at normal incidence and frequency.

[Explanation of symbols]

 A: Lower roof A1: Lower folded plate-like building plate B: Upper roof B1 ... Upper-layer folded plate-like building plate 1a: Inclined section 2: Bottom section 3: Small through hole 6: Fibrous sheet

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kiyoshi Imai 80-18 Otouchi, Tomita-cho, Koriyama-shi, Fukushima Prefecture (56) References JP-A-51-52619 (JP, A) (JP, U) JP-A 4-66230 (JP, U) JP-A 63-11228 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04D 3/35 E04B 1 / 82

Claims (1)

(57) [Claims] An upper roof made of an upper folded plate-like building plate is laid at an appropriate interval above an lower roof made of a lower folded plate-like architectural plate, and bored many Onuki holes in both inclined and bottom of the plate, the inclined portions and bottom
A two-layer roof having sound absorbing performance, characterized in that a water-repellent fibrous sheet is polymerized on the upper or lower surface of a part .