JPH0717684Y2 - Soundproof panel - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a soundproof panel used for a ceiling material, floor material wall material, door, etc. of a house, and relates to a structure in which a metal foam is interposed in the middle.

[Prior art and its problems]

A conventional soundproof panel is made by joining surface materials to the front and back of a frame consisting of a vertical frame, an upper frame, and a lower frame, and at the middle part between the surface material and the surface material, a fiber sound absorbing material such as glass wool or rock wool. The thing which installed the material is often used.

However, the surface material is plywood, medium fiberboard (JISA-850
It is used as a base material such as 1) with a decorative coating and a decorative sheet attached to its surface, so it is permeable to moisture and absorbed by the internal fibrous sound absorbing material.

The fibrous sound absorbing material releases moisture absorbed slowly, which causes mold to develop inside the panel (when the mold becomes severe, the frame also appears on the surface material.) The frame itself generates a wedge due to decay fungus, or warps. (The panel itself is distorted and a gap is formed between the panel and the frame material) and the sound absorbing performance of the panel itself is deteriorated.

Further, the mechanical strength of the soundproof panel in which these fibrous sound absorbing materials are interposed is only the strength of the surface material and the core material, and is not sufficient in terms of strength.

Further, as a means for solving such a strength problem, a honeycomb core is used as a core material, and a filling material such as pearlite or rock wool is filled in the void inside the honeycomb core, and the surface of the filling material is bonded and fixed. However, the process of filling the filler is very complicated, and the soundproofing effect and strength of the obtained panel are still unsatisfactory.

[Means to solve the problem and its action]

In order to solve the problems of the conventional soundproof panel, the present invention is one in which a metal foam body 3 for sound absorption and a sound insulation sheet 4 for sound insulation are laminated inside the soundproof panel.

The present invention, by adopting such a configuration, has a high strength in spite of being lightweight and can provide a high soundproofing effect over a wide frequency range.

[Explanation of Examples]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a frame assembly consisting of a vertical frame 2a, an upper frame 2b, and a lower frame 2c,
Surface material 1 to be bonded to the front and back, and when this surface material is bonded, a metal foam having the same dimensions as the inner dimensions (width, length) of the frame is provided in the hollow portion of the surface material 1 and the surface material 1. FIG. 3 is an assembly diagram for arranging a laminated body including a body 3 and a sound insulation sheet 4, each of which has a vertical frame 2a, an upper frame 2b, and a lower frame 2c, which are first frame-assembled, on one side of plywood, fiberboard and particle board. If necessary, after applying an optional undercoating to the surface, attach colored paint or print-printed a pattern of your choice, or glue sheet-like materials such as paper, cloth, synthetic resin sheet, etc. The surface material 1 adhered via the agent is adhered with an adhesive or a stapler.

Next, an adhesive is applied to the surface of the sound-insulating sheet 4 and the metal foam 3 having the same size as the inner dimension of the frame and having the sound-insulating sheet 4 attached to the front and back sides in advance is inserted into the frame.

The metal foam 3 to which the sound insulation sheet 4 is attached has a thickness equal to or slightly smaller than the thickness of the frame.

Next, the surface material 1 is attached to the other surface by an adhesive or a stapler.

As the metal foam 3 used here, for example, aluminum is used as a main component, and an appropriate amount of magnesium, silicon, titanium, or the like is mixed therein, heated, naturally cooled, and cast to obtain an aluminum foam having an appropriate thickness. Use sliced ones.

This aluminum foam has a cell structure consisting of aggregates of closed cells, the number of closed cells inside is 2 to 7 mm, and the bubble ratio is about 75 to 90% and the apparent specific gravity is 0.15 to 0.35. It is extremely lightweight and extremely strong compared to.

Since it is a metal, it does not absorb moisture, prevents the generation of mold, wedges, and warpage, has excellent impact and absorption properties, and has a high sound absorbing effect over a wide frequency range.

By adjusting the bubble ratio within the range of about 75 to 90% according to the purpose of use, it is possible to easily select the metal foam body that is most expected to have a sound absorbing effect.

Further, by subjecting this metal foam to compression processing, fine cracks are generated in the cell structure composed of innumerable closed cells, and the cells can be connected to each other to obtain a high sound absorbing effect as a breathable porous body. This compression processing can be performed within a range of maximum compression ratio of 1/3, and compression of only the surface or compression of the entire surface can be performed, but it is preferable that only the surface is subjected to compression processing. For example, a metal foam with a thickness of 15 mm is 5 m
Compress to m thickness.

As a sound insulation sheet, a material with a large specific gravity,
For example, lead, metal such as steel plate, polyvinyl chloride resin and copolymerizable resin, or metal powder to these synthetic resins,
In addition to a mixture of a metal oxide and an inorganic powder, a known material as a sound insulating material is molded into a sheet shape.

FIG. 2 is a perspective view of the soundproof panel of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. As shown in FIG. 3, a soundproof panel in which a sound-insulating sheet 4, a metal foam 3 and a sound-insulating sheet 4 are laminated on the back surface of the surface material in this order is directed to the sound source. When arranged, the generated sound is first reflected on the surface of the surface material 1. However, the surface material transmits most of the sound, reaches the sound insulation sheet 4 while being attenuated in the surface material, and is reflected. The sound that is not reflected by the sound insulating sheet 4 reaches the metal foam body 3 and is converted into heat energy by friction with the film surface of the cell structure of the metal foam body, thereby reducing both the sound velocity and sound pressure. It passes through and is reflected by the sound insulating sheet 4, and does not reach the sound source on the opposite side of the soundproof panel.

A sound insulation sheet 4 is provided at the center of the metal foam 3 shown in FIGS. 4 and 3.
It is a soundproof panel using a laminated body provided with, and further excellent soundproof effect can be obtained.

INDUSTRIAL APPLICABILITY The soundproof panel of the present invention can be applied as a door such as a wall board, a ceiling board, etc. by incorporating a handle.

[Effect of the Invention] In the soundproof panel of the present invention, by arranging the laminated body S including the metal foam 3 and the sound insulating sheet 4 in the hollow portion between the frame 2, the surface material 1 and the surface material 1, Since the strength of the metal foam 3 is added to the strength of the frame 2 and the surface material 1, the metal foam 3 has high strength in spite of being lightweight, and further has high soundproofing effect over a wide frequency range, and its soundproofing. The effect is an excellent soundproof panel that is not affected by humidity.

The sound is first reflected by the surface material 1, and the sound insulation sheet 4 in it is reflected.
Since the reflection (sound insulation) by and the sound absorption by the metal foam body 3 are alternately performed, an excellent soundproof effect is exhibited.

[Brief description of drawings]

FIG. 1: Exploded perspective view of the soundproof panel of the present invention, FIG. 2: Perspective view of the soundproof panel, FIG. 3: AA cross-sectional view of FIG. 4, FIG. A sectional view, 1: surface material, 2: frame set, 2a: vertical frame, 2b: upper frame, 2c: lower frame, 3: metal foam, 4: sound insulation sheet, S: laminated body,

Claims (3)

[Scope of utility model registration request] 1. A frame assembly 2 comprising a vertical frame 2a, an upper frame 2b and a lower frame 2c.
In a panel obtained by laminating the surface material 1 on the front and back sides of the above, a laminate S composed of the metal foam 3 and the sound insulating sheet 4 is arranged in the hollow portion between the surface material 1 and the surface material 1. Soundproof panel characterized by. 2. The soundproof panel according to claim 1, wherein a laminated body is used in which the metal foam 3 and the soundproof sheet 4 are stacked so that the soundproof sheet 4 is located on the back surface of the surface material 1. 3. A sound insulating sheet 4 is located on the back surface of the surface material 1,
The soundproof panel according to claim 1, wherein the laminated body S is formed by laminating the metal foam body 3 and the soundproof sheet 4 so that the soundproof sheet 4 is located at the center of the laminated body S.