JP2015132743A - Upside-improved translucent-type film vibration sound absorption/insulation wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable manufacturing of a translucent-type film vibration sound absorption/insulation wall for road and railroad having a high sound absorption characteristic, by using an upside-improved translucent-type film vibration sound absorption/insulation wall.SOLUTION: In the upside-improved translucent-type film vibration sound absorption/insulation wall, a translucent-type film vibration sound absorption plate 8 is disposed on both the sound source side and sound absorption side of an upside translucent-type film vibration sound absorber 4 of a translucent-type film vibration sound absorption/insulation wall, and a transparent-resin-made sound insulation plate 9 is disposed in the center part of the upside translucent-type film vibration sound absorber 4. A continuous-bubble-type elastic foam sound absorption material 7 included in a Teflon (R) bag is lined inside a steel-plate-made side wall 10 of the upside translucent-type film vibration sound absorber 4, and a top sound absorber 3 including a continuous-bubble-type elastic foam sound absorption material 7 included in a Teflon (R) bag is disposed at the uppermost part.

Description

  The present invention belongs to the technical field related to sound insulation walls such as roads and railways. More specifically, the present invention relates to a translucent membrane vibration sound-absorbing and sound-insulating wall having not only sound-absorbing properties but also visibility and light-transmitting properties through the sound-insulating wall.

  As a sound insulation wall for roads and railways, conventional sound source side is a metal plate with many slits, and the back sound insulation plate is a metal plate in a metal casing, soft fiber porous sound absorbing material such as glass wool For the purpose of preventing deterioration due to ultraviolet rays, rainwater, etc., a material that is protected with a weather-resistant film is generally inserted.

  In addition, a translucent sound insulation wall using only a transparent resin sound insulation board and the like is available as a countermeasure against sunlight and scenery on a private house on the road side, and a countermeasure against the view. More recently, the translucent film vibration sound absorbing plate and transparent resin made by the present inventors, such as Japanese Patent Application Laid-Open No. 2000-170124 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2007-303080 (Patent Document 2). A translucent membrane vibration absorbing sound insulating wall combined with a sound insulating plate has been put into practical use.

JP 2000-170124 A JP 2007-303080 A

  The translucent type membrane vibration absorbing sound insulating wall, which is a combination of the translucent type membrane vibrating sound absorbing plate and the transparent resin sound insulating plate invented by the present inventors, has been put into practical use, the problem of sunshine to private houses on both sides of the road, and the outside of the road Although problems such as strong occlusion have been solved because the passenger cannot see the outside scenery due to the shielding of the field of view, the sound absorption characteristics are still not sufficient.

  The inventors of the present invention have found a light-transmitting membrane vibration-insulating wall having an improved upper part with better sound-absorbing characteristics through years of experience in manufacturing a translucent membrane-vibration sound-absorbing plate and recent experimental verification. It is.

In the first aspect of the present invention, a translucent film vibration sound absorbing plate is disposed on both the sound source side and the sound receiving side of the upper sound absorber of the translucent film vibration sound absorbing and sound insulating wall, and a transparent resin sound insulating wall is provided at the center. Consists of an upper sound absorber with a plate, lined with an open cell elastic foam sound absorber inside the steel plate side wall of the sound absorber, and further comprises a soft fiber sound absorber or an open cell elastic foam sound absorber at the top. A top improved translucent membrane vibration absorption sound insulation wall characterized by having a top sound absorber.

According to a second aspect of the present invention, a transparent resin sound insulating plate is provided inside the upper sound absorbing panel of the translucent membrane vibration absorbing sound insulating wall described in the first aspect, and the sound source side upper corner of the upper sound absorber. Upper part improvement characterized by having a top sound absorber comprising a soft fiber-based sound absorbing material or an open-cell elastic foam sound absorbing material at the top of the sound receiving side of the lower corner to be connected diagonally. It is a type translucent type membrane vibration sound absorbing wall.

In a third aspect of the present invention, the translucent membrane vibration-absorbing sound board according to the first and second aspects has a single transparent perforated resin plate having a large number of openings and a large number of openings. The upper improved translucent membrane vibration absorbing sound insulation wall is characterized by having a structure in which a transparent resin thin film is sandwiched between a sheet of aluminum expanded metal that has been flattened in advance. is there.

By using the improved upper light-transmitting membrane vibration-absorbing and sound-insulating wall of the present invention, it is possible to produce light-transmitting membrane vibration-absorbing and sound-insulating walls for roads and railways that have better sound absorption characteristics.

It is a top view which shows the upper part of the upper improvement type translucent type | mold film vibration sound-absorption wall of this invention. It is a figure which shows the translucent type | mold film vibration sound-absorbing board used for the upper improvement type translucent type | mold film vibration sound-absorbing sound insulation wall of this invention. It is a figure which shows the top sound-absorbing body of the upper improvement type translucent type | mold film vibration sound-absorbing sound insulation wall of this invention. It is a figure which shows an upper translucent type | mold film vibration acoustic absorber. It is a figure which shows an upper translucent type | mold film vibration sound-absorbing body B. FIG. It is a figure which shows the conventional translucent type | mold film vibration sound-absorbing body. It is a figure which shows the conventional type translucent type | mold film vibration sound-absorbing sound insulation wall. It is a figure which shows the upper improvement type translucent type | mold film vibration sound-absorbing sound insulation wall A and B. FIG. It is a figure which shows the implementation point of the field test about a sound reduction effect.

The upper improved translucent membrane vibration absorbing sound insulating wall of the present invention will be described in detail with reference to the accompanying drawings. In addition, drawing is a conceptual diagram for description, and is not in accordance with an actual size and a real photograph.
In the following description, the open-cell elastic foam sound-absorbing material has a very dense internal cell (pore) structure made of resin, and these cells (pores) are connected to each other so that the front and back surfaces of the material The sound wave (vibrating air particles) receives frictional resistance that passes through the pores and is converted into thermal energy and absorbed.

FIG. 1 is a view for explaining the structure of an upper improved membrane vibration absorber A and an upper improved membrane vibration absorber B of the present invention. FIG. 1 (a) is a front plan view of these upper sound absorbers. 1 (b) is an aa cross-sectional view of the upper improved membrane vibration absorber A (No. 1) shown in claim 1, and FIG. 1 (c) is the upper improved membrane vibration absorber of claim 2. Aa sectional drawing of B (number 2) is shown.

  In FIG. 1, reference numeral 3 denotes a diagram for explaining the structure of the top sound absorber 3 in which a soft fiber-based sound absorbing material such as glass wool or an open-cell elastic foam sound absorbing material 7 is enclosed in a Teflon (registered trademark) bag. The top surface of the top sound absorber 3 is covered with a perforated plate 6 such as punching metal. Reference numeral 4 denotes an explanatory diagram of an aa cross section of the upper translucent membrane vibration absorbing plate sound absorber A shown in claim 1. The side wall 10 is made of a steel plate, and a transparent resin sound insulating plate 9 is disposed perpendicularly to the central portion. On the sound source side and the sound receiving side of the upper light transmissive membrane vibration sound absorbing plate sound absorber 4, a light transmissive film vibration sound absorbing plate 8 is disposed. In addition, on the upper and lower side walls inside the upper light transmissive membrane vibration sound absorbing plate sound absorber 4, an open cell elastic foam sound absorbing material 7 in a Teflon (registered trademark) bag is disposed.

Reference numeral 5 denotes an explanatory diagram of an aa cross section of the upper light transmissive membrane vibration absorbing plate absorber B shown in claim 2. Similarly to the above, the side wall 10 is made of a steel plate, and a transparent resin sound insulating plate 9 is disposed so as to diagonally connect the sound source side upper corner and the sound receiving side lower corner. On the sound source side and sound receiving side of the panel, a translucent membrane vibration sound absorbing plate 8 is disposed. In addition, open-cell elastic foam sound-absorbing materials 7 in a Teflon (registered trademark) bag are disposed above and below the side walls inside the upper light-transmitting membrane vibration sound-absorbing plate sound absorber 5.

  2A and 2B are diagrams showing an example of the structure of the translucent membrane vibration absorbing plate 8 used in the present invention. FIG. 2A is a plan view and FIG. 2B is a cross-sectional view taken along line bb. Show. In the figure, reference numeral 13 denotes a fluorine-based transparent resin thin film, reference numeral 11 denotes a plate-like aluminum expanded metal flattened in advance, and reference numeral 12 denotes a transparent perforated resin plate having a large number of openings.

  By the way, the structure of the translucent film vibration absorbing plate 8 is not limited to the structure shown in FIG. 2, and the fluorine-based transparent resin thin film 13 is sandwiched between two pre-flattened plate-like aluminum expanded metals 11. Or a transparent transparent resin plate 12 having a large number of openings and a fluorine-based transparent resin thin film 13 sandwiched between them.

Hereinafter, the present invention will be specifically described with reference to examples.
(Example 1) (Translucent membrane vibration absorber A)
An embodiment of the translucent film vibration sound absorbing plate 8 will be described with reference to FIG. 2A is a plan view, and FIG. 2B is a bb cross-sectional view thereof. First, a plate-like aluminum expanded metal 11 having a size of 450 mm (width) × 1960 mm (length) prepared by flattening an aluminum expanded metal having a mesh size of 4 mm × 8 mm using a rolling roll is prepared. did.

Further, the thickness is 1.5 mm, the opening diameter is 10 mm, and the center distance (pitch) between the openings is 16 m.
m, a transparent perforated resin plate 12 having a staggered arrangement with an opening angle of 60 degrees, an opening ratio of 35%, and a size of 450 mm (width) × 1960 mm (length) was prepared.

A fluororesin thin film 13 having a thickness of 12 μm was prepared as a transparent resin thin film, and this was sandwiched between the plate-like aluminum expanded metal 11 and the transparent perforated resin plate 12. This was fixed with a tape made of aluminum using a caulking machine to constitute a frame 14, and a single translucent membrane vibration sound absorbing plate 8 was obtained. An aluminum tape having a thickness of 0.2 mm and a width of 20 mm was used.

Top sound absorber 3 (corresponding to claims 1 and 3)
FIG. 3 is a view showing the top sound absorber of the upper improved translucent membrane vibration absorption wall according to the present invention. As shown in FIG. 3A, a casing 15 made of a steel plate having a size of 1960 mm (length) × 102 mm (width) × 50 mm (height) and having only the upper surface released was manufactured. The thickness of the steel plate used is 1.6 mm. As shown in this figure, semicircular (15 mmR) drain holes 18 were provided on both sides of the short side of the housing.

Also, as shown in FIG. 3B, a teflon (registered trademark) bag 16 having a thickness of 25 μm is provided with a shredded open-cell elastic foam sound absorbing material 17 in the case 15 made of steel. The upper surface of the open-cell elastic foam sound absorbing material 7 filled with Teflon (registered trademark) bag is covered with a steel plate perforated plate 6 having a thickness of 1.0 mm and an aperture ratio of 35.4%. The top sound absorber 3 was obtained.

FIG. 4 is a view showing the upper translucent membrane vibration absorber A. As shown in FIG. As shown in FIG. 4A, first, a side wall 10 made of a steel plate having both sides released by 1960 mm (length) × 102 mm (width) × 450 mm (height) was manufactured. The thickness of the steel plate used is 1.6 mm. A transparent resin sound insulating plate 9 having a thickness of 5 mm was attached to the central portion of the side wall 10 made of steel plate. FIG. 4B is a sectional view taken along the line dd in FIG. As shown in FIG. 4 (b), the open cell type in a Teflon (registered trademark) bag having a thickness of 35 mm and a width of 46 mm is provided on the four sides of each sound absorber divided into two by the transparent resin sound insulating plate 9. Elastic foam sound absorbing material 7 was attached. The top sound absorber 3 was attached on the sound absorbing panel to obtain an upper improved translucent membrane vibration absorber A (No. 4).

(Example 2) Translucent membrane vibration absorber B (corresponding to claims 2 and 3)
FIG. 5 is a view showing the upper translucent membrane vibration absorber B. As shown in FIG. As shown in FIG. 5 (a), first, a side wall 10 made of a steel sheet having both sides released by 1960 mm (length) × 102 mm (width) × 450 mm (height) was manufactured. The thickness of the steel plate used is 1.6 mm. A transparent resin sound insulating plate 9 having a thickness of 5 mm was attached so that the sound source side upper corner and the sound receiving side lower corner of the side wall 10 made of steel plate were connected diagonally.

  FIG.5 (b) is ee sectional drawing of Fig.5 (a). As shown in FIG. 5 (b), inside the side wall of each sound absorbing panel that is obliquely divided into two by the transparent resin sound insulation board 9, a Teflon (registered trademark) bag having a thickness of 35 mm and a width of 92 mm is contained. An open-cell elastic foam sound absorbing material 7 was attached. The top sound absorber 3 was attached on the sound absorbing panel to obtain an upper improved translucent membrane vibration absorber B (No. 5).

(Example 3) (Field test A)
FIG. 6 is a view showing a conventional translucent membrane vibration absorber. FIG. 6A shows a perspective view of a conventional translucent membrane vibration acoustic absorber 19. FIG. 6B is a sectional view taken along line ff. As shown in FIG. 6 (a), a steel-steel side wall 10 having both sides opened by 1960 (length) × 102 mm (width) × 500 mm (height) was manufactured. The thickness of the steel plate used is 1.6 mm. So that one side of the steel-made side wall 10 is closed. A transparent resin sound insulating plate 9 having a thickness of 5 mm was attached. Further, a translucent membrane vibration sound absorbing plate 8 was attached so as to close the other side. An open-cell elastic foam sound-absorbing material 7 with a Teflon (registered trademark) bag having a thickness of 35 mm and a width of 95 mm was attached to the four circumferences of the sound absorber.

  FIG. 7 is a view showing a conventional translucent membrane vibration absorbing sound insulating wall. FIG. 7A is a front view of the soundproof wall 20 for field test strike using the above-described conventional translucent membrane vibration absorbing body 19 as a whole. FIG. 7B shows a gg cross-sectional view thereof. The structure of the soundproof wall is a structure in which the conventional membrane vibration absorber 19 is dropped into the H-shaped steel column 23 to form a six-stage product and is received by the H-shaped steel foundation 24. The transparent resin sound insulating plate 9 side is the sound receiving side, and the translucent membrane vibration sound absorbing plate 8 side is the sound source side.

  FIG. 8 is a view showing the upper improved translucent membrane vibration absorption wall A and B. FIG. In FIG. 8A, only the upper-stage improved translucent membrane vibration absorber A (No. 1) or B (No. 2) of the present invention is shown in the uppermost stage, and the conventional translucent membrane vibratory absorber 19 is used in the other cases. The front view of the upper improved type membrane vibration sound-absorbing sound insulation wall A (No. 21) and the upper improvement type membrane vibration sound-absorbing sound insulation wall B (No. 22) for the field test strike used is shown. Further, FIG. 8B shows a cross-sectional view of the h-h as an example of the upper improved type membrane vibration absorption wall B (22). The structure of the soundproof wall is also the same as described above, with the membrane vibration sound absorber 19 having five stages, and the uppermost layer being the upper improved translucent film vibration absorber A (number 1) or B (number 2) of the present invention. Then, it was dropped into the H-shaped steel support 23 to make a six-stage product, and the structure was received by the H-shaped steel foundation 24. The lower five-stage conventional translucent membrane vibration absorbing body 19 is configured so that the transparent resin sound insulating plate 9 side is the sound receiving side and the translucent membrane vibrating sound absorbing plate 8 side is the sound source side.

  FIG. 9 is a diagram showing the point of execution of a field test on the sound reduction situation of the conventional translucent membrane vibration absorption wall 20 and the upper improved translucent membrane sound absorption walls 21 and 22 of the present invention. A pair of sound insulation walls 20, 21 and 22 each having a height of 3.3 m were installed with a length of 30 m and an interval of 15 m. The speaker 25 was installed in the center at a height of 0.5 m. In addition, two points (P-1 and P-2) having a height of 1.2 m at a position of 5 m, 10 m from the sound insulation wall were set as measurement points 26, and a microphone 27 was installed here.

1/1 octave band noise of 500 Hz, 1000 Hz, and 2000 Hz was generated and used as a test sound source. The strength of the test sound source was adjusted to be 100 dB at a point 1 m in front of the speaker 25. First, as a comparative example, the sound insulation effect was confirmed using a conventional translucent membrane vibration absorption wall 20 shown in FIG. Next, as Example 3, the uppermost stage shown in FIG. 8 used the upper improved translucent film vibration absorber A (No. 1), and the other five stages used the conventional translucent film vibration absorber 19. The sound insulation effect was confirmed using the upper improved translucent membrane vibration absorbing sound insulation wall 21.

  The sound reduction effect is obtained from the sound pressure level (dB) of the comparative example of the conventional translucent membrane vibration absorption wall 20 shown in FIG. 7 at each measurement point (P-1 and P-2) 26 shown in FIG. 3 was obtained by reducing the sound pressure level (dB) of the upper improved translucent membrane vibration absorption wall 21 and these are summarized in Table 1.

表１に各周波数での測定点Ｐ−１，Ｐ−２での減音値（比較例−実施例）によって減音
効果を示した。

Table 1 shows the sound reduction effect by the sound reduction values (comparative example-example) at the measurement points P-1 and P-2 at each frequency.

As is apparent from Table 1, the conventional translucent membrane vibration absorbing sound insulation wall for testing using all of the six stages of the conventional translucent membrane vibration absorber 19 shown in FIG. 7 at all frequencies in the table. It is clear that the soundproofing wall of Example 3 using the upper improved type membrane vibration absorber A (No. 1) shown in FIG. 8 has a better sound reduction effect than the comparative example using 20. is there.

(Example 4) (Field test B)
Next, as Example 4, as shown in FIG. 8, the uppermost stage uses the upper improved translucent membrane vibration absorber B (No. 2), and the other five stages use the conventional translucent membrane vibration absorber 19. The sound insulation effect was confirmed using the upper improvement type translucent type | mold film vibration sound absorption wall 22 used. The sound reduction effect is the upper part of Example 4 from the sound pressure level (dB) of the comparative example of the conventional translucent type membrane vibration absorption wall 20 shown in FIG. 7 at each measurement point (P-1 and P-2) 26. These values were determined by reducing the sound pressure level (dB) of the improved translucent membrane vibration absorption wall 22 and are summarized in Table 2.

表２も表１と同様に、各周波数での測定点Ｐ−１，Ｐ−２での減音値（比較例−実施例
）によって減音効果を表した。

Similarly to Table 1, Table 2 also represents the sound reduction effect by the sound reduction values (comparative example-example) at the measurement points P-1 and P-2 at each frequency.

  As is clear from Table 2, the conventional translucent membrane vibration absorbing sound insulation wall for the test using the conventional translucent membrane vibration absorber 19 shown in FIG. 7 in all six stages at all frequencies in the table. It is clear that the soundproof wall of Example 4 using the upper improved type membrane vibration absorber B (No. 2) shown in FIG. 8 has a better sound reduction effect than the comparative example using No. 20. .

  By using the improved upper light-transmitting membrane vibration-absorbing and sound-insulating wall of the present invention, it is possible to provide a light-transmitting membrane vibration-absorbing and sound-insulating wall for roads and railways having better sound absorption characteristics.

1 Upper improved translucent membrane vibration absorber A
2 Upper improved translucent membrane vibration absorber B
3 Top Sound Absorber 4 Structure of Upper Improved Translucent Membrane Vibration Absorber A 5 Structure of Upper Improved Translucent Membrane Sound Absorber B 6 Steel Plate Perforated Plate 7 Teflon (R) Bag Open Cell Elasticity Foam sound absorbing material 8 Translucent membrane vibration sound absorbing plate 9 Transparent resin sound insulating plate 10 Steel plate side wall 11 Plated aluminum expanded metal 12 Transparent perforated resin plate 13 Fluorine-based transparent resin thin film 14 Frame 15 Steel plate casing 16 Teflon (registered trademark) bag 17 Open-cell elastic foam sound-absorbing material 18 Drain hole 19 Conventional translucent membrane vibration-absorbing sound absorber 20 Conventional translucent membrane-vibrating sound-absorbing sound-insulating wall 21 Upper improved membrane vibration-absorbing sound-insulating wall A
22 Upper improved type membrane vibration absorption wall B
23 H-type steel support 24 H-type steel foundation 25 Speaker 26 Measurement point 27 Microphone


Patent applicant UNIX Corporation
Attorney: Attorney Shiina

Claims (3)

The upper part of the upper improved light-transmitting membrane vibration absorbing sound insulating wall is provided with a light-transmitting membrane vibration absorbing board on both the sound source side and the sound receiving side of the upper sound absorber, and a transparent resin sound insulating board is provided in the center. Consists of a sound absorber, having an open-celled elastic foam sound-absorbing material on the inside of the steel plate side wall of the panel, and further having a top sound-absorbing material with a soft fiber-based sound-absorbing material or an open-cell elastic foam sound-absorbing material at the top. An upper improved translucent membrane vibration absorption wall. A single transparent resin sound insulation board is diagonally connected to the sound source side upper corner and the sound reception side lower corner of the panel inside the upper sound absorber of the improved light-transmitting membrane vibration absorption sound insulation wall of claim 1. And a top improved sound-absorbing sound-absorbing sound-insulating wall characterized by having a top sound-absorbing body provided with a soft fiber sound-absorbing material or an open-cell elastic foam sound-absorbing material at the top. The translucent membrane vibration absorbing board according to claim 1 or 2 is prepared by previously flattening a single transparent perforated resin plate having a large number of openings and a single aluminum expanded metal having a large number of openings. An upper improved light-transmitting membrane vibration-absorbing and sound-insulating wall, characterized by comprising a structure in which a transparent resin thin film is sandwiched between a flat plate-like body.

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