JPH0452800Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a soundproof panel, particularly a composite soundproof panel that combines a sound insulator and a sound absorber.

[Conventional technology] Conventionally, in order to block out noise generated from highways, factories, power plant boilers, etc., the material sound-insulating properties of glass fiber reinforced cement (hereinafter referred to as GRC) have been utilized, and other sound-absorbing materials have been used. For example, sound-insulating and sound-absorbing soundproof panels are provided in which sound-absorbing bodies made of rock wool, glass wool, or inorganic foam are laminated. For this soundproof panel, GRC is cast as the bottom plate 22 as shown in FIG. 5, and then side plates 23 are cast on the peripheral edge. 28 is known, which has a sound insulation function by the sound insulation body and a sound absorption function by the sound absorption body 28.

Of course, many soundproof panels (sound absorbing and sound insulating panels) made of materials other than GRC have been researched and developed, and there are many proposals regarding them.

For example, Utility Model Application Publication No. 57-49115 is shown in Figure 6 A.
As shown in FIG. 2, an inorganic fiber aggregate 101 such as glass wool or rock wool is blended with a binder resin, compression molded to have a predetermined high density and a cross-sectional channel shape, and a covering material 102 is attached to the outer surface of the sound absorbing material. Forms insulation. The cross section is U-shaped, and both ends are bent outward to facilitate installation.

In addition, as illustrated in FIG.
A sound absorbing and insulating panel is formed by fixing a plate-shaped sound absorbing material 104 made of high-density compression molding of inorganic fibers to 03 (a bent product made of a galvanized iron plate) so as to close the entire front opening of the case. Specifically, for this fixation, both ends of the sound insulating case are further bent inward, and projecting edges 103a are provided above and below to press against the bent sides 104a of the plate-shaped sound absorbing material.

[Problems that the invention aims to solve] First, the conventional soundproof panel (No. 5
Fig. 2), the sound absorbing body 28 is held in the internal cavity of the sound insulating body by covering it with the punching metal 27 attached to the end surface of the side plate, so the punching metal mounting screws 30 etc. If the punching metal 27 becomes loose and the punching metal 27 comes off, the sound absorbing body 28 easily comes off.

In addition, when a large number of panels containing sound absorbing bodies are connected to construct a soundproof wall, the soundproofing bodies are required to serve as auxiliary members for the pillars, so they carry a relatively large load. Therefore, appropriate strength is required. As an example of such replenishment, as disclosed in Japanese Utility Model Application Publication No. 57-123407, it has been proposed that prestress wires, wire mesh, reinforcing bars, etc. are embedded in the bottom plate and side plates of a concrete frame.

However, adopting the above-mentioned reinforcement measures not only takes time and effort to manufacture, but is also difficult to adopt for GRC, whose main purpose is to provide strength with thin walls. It had drawbacks such as increased thickness and weight.

Furthermore, as is clear from FIG. 5, short glass fibers 28 are formed at the corners (rising portions from the periphery of the bottom plate to the side plates) A formed by the bottom plate 22 and the side plates 23.
There is no connection at all, the plate thickness direction and corners are prone to cracking under load, and no matter what kind of mounting bracket is used, it must be judged that the ability to absorb the concentrated stress applied to the mounting part is relatively small. do not have.

Soundproofing panels made of materials other than GRC each have their own characteristics, but differences in materials lead to major differences in manufacturing or structure, and it is impossible to apply a common configuration as is.

For example, in the case of Fig. 6, since it is simply compression molded by blending a binder resin with glass wool, etc., only a sound absorption effect can be expected, and it is far from the combined sound insulation effect of the present invention of sound insulation and sound absorption. By the way, it's not. Moreover, even if we compare it with the sound insulating body of the present invention in the sense of a molded body, if the method of obtaining a high-density molded body through compression molding is an auxiliary method, it is inconceivable to apply it as the main body of cement molding. I can't. Although it is possible to bend the end of the side plate further outward as shown in Figure 2, it is extremely difficult to bend all four sides inward (U-shaped cross section) by compression. Although it is not impossible to remove the molded product from the press mold after molding by using a split mold, the inefficient work is unbearable.

Furthermore, the sound insulating case shown in Figure 7 has its ends bent twice at right angles to form a U-shaped cross section, but the material of this case is a thin steel plate with the highest formability, such as a galvanized iron plate, and compared to GRC. It is clear that the sound insulation effect is significantly inferior. In other words, the thin steel plate of the sound insulation case is not intended to have a sound insulation effect, as it is highly likely that vibrations will be easily induced if it receives sound waves, but it is merely intended to serve as a support member for attaching the sound absorption plate. Moreover, even when compared with the sound insulation body of the present invention in the sense of a molded body, in this conventional technology, the thin steel plate is bent twice into a U-shaped cross section by press forming, but only at the upper and lower sides of the figure. As with the previous example, it is extremely unrealistic to bend all four sides of the case inward to form a picture frame.

This idea eliminates the drawbacks of the conventional ones as mentioned above, and the sound absorbing body is securely held in the internal cavity of the GRC sound insulating body, and the sound insulating body is reinforced without increasing the weight, resulting in both sound insulation and sound absorption. The purpose is to provide a composite soundproofing panel that exhibits integrated effects.

[Means for Solving the Problems] The composite prevention panel of the present invention includes a rectangular bottom plate 2, a side plate 3 whose peripheral edges on all four sides of the bottom plate are bent upward at right angles, and a side plate 3 whose peripheral edges on all four sides of the side plate are bent upward at right angles. Furthermore, a frame-shaped box body made of an eave board 4 bent inward at a right angle is reinforced with glass fibers made of unsolidified cement material and reinforced with short glass fibers 9 oriented almost parallel to the board surface in all cross sections. It consists of a sound insulating body 1 made of cement and a sound absorbing body 8 whose top and side surfaces are covered with perforated metal plates 7, and the sound absorbing body 8 is firmly housed in the internal space of the sound insulating body 1 without forming any gaps. The above-mentioned problem was solved by placing the two pieces in place and integrally anchoring them by the non-solidified cement material that exuded from all the contact surfaces of the two pieces.

[Function] The soundproof panel of this invention is made by combining one GRC board with two
As a result of diffraction and bending to create a frame-like structure on all four sides of the rectangle, the corners, which are particularly prone to breakage, are strengthened and the strength is improved in the same way as increasing wall thickness. That is,
If we pay attention to the shape of the cross section of the board, the orientation of the glass fibers is unified to be almost parallel to the front and back surfaces in all cross sections, and as shown in Fig. Even in the corners A and B, the short glass fibers 9 are connected and arranged almost uniformly, so that the strength of the short glass fibers 9 is fully utilized, preventing breakage and formation of tortoise rows in the corners A and B. This is avoided and the weight does not increase significantly.

Next, this frame-shaped box (GRC sound insulation body)
The sound absorber is fitted into the internal cavity of the G.G.
After the RC bites into the many holes of the punching metal 7 and solidifies, it becomes engaged, and some of the unsolidified cement material seeping out from the many holes enters the inner surface of the sound absorber through the holes and hardens. In addition, regarding the bottom surface of the sound absorber, the unsolidified cement material directly seeps into the surface of the porous sound absorber and interacts with the surface of the porous sound absorber, and after solidifying, it is integrally attached to the sound absorber, creating a strong fixed state. form. Such a state is shown in FIG. 4, and the differences are clarified by comparing it with the conventional technology (FIG. 5).

Of course, reinforcing cement structures by pasting them with metal plates is a common practice in the past, but all four sides of the inner periphery of a rectangle are bent twice at right angles, and all the sides that touch this inner surface are The complete composite structure, which is integrally engaged with the material fitted inside over the contact surface, is a construction that cannot be found anywhere else.

[Example] As shown in FIGS. 1 to 4, the sound insulation panel has a sound insulation body 1 made of a GRC box body integrally formed as an outer shell, and this sound insulation body 1 has a rectangular bottom plate. 2. It has a side plate 3 formed by bending the peripheral edge of the bottom plate 2 upward, and an eave plate 4 formed by bending the upper end of this side plate 3 inward, and an opening 5 is formed between the eave plate 4. is formed.

The internal space of the sound insulating body 1 is integrally provided with a sound absorbing body 8 whose surface is covered with a glass net 6 as necessary and whose surface and side surfaces are covered with a punching metal 7 having a large number of holes. 7 and each of the side plates 3 and the eaves plate 4, and between the back surface of the sound absorber 8 and the bottom plate 2, which are fixed and housed without any gaps being formed therebetween.

As the sound absorber 8, rock wool, glass wool, inorganic foam material, etc. are used.

When manufacturing a soundproof panel as described above, formwork (not shown), that is, a bottom plate formwork, a side plate formwork, and an eaves plate formwork that are pivotally supported to each other, are placed in a horizontal state, and then a feeder (not shown) is placed on top of them. A glass fiber with a predetermined width and a constant thickness, in which many short glass fibers of approximately 2 to 4 cm are continuously unwound and mixed in the horizontal direction.
Cast RC in sheet form. Then, before the sheet-shaped GRC has hardened yet, a sound absorber 8 covered with a punching metal 7 is placed on the bottom plate 2, and then the cast sheet-shaped GRC is passed through the formwork (not shown) to the side plate 2. Then, the eaves plate 4 is formed and solidified. In addition, the above-mentioned cast sheet-shaped GRC
After bending, an embedded nut 11 for lifting and mounting is set in the corner portion formed with two adjacent side plates 3, and the vicinity is filled with GRC. A soundproof panel is thus formed. In the drawings, reference numeral 10 denotes a glass net that is embedded into the sound insulation body 1 as required.

[Effect of the invention] According to the soundproof panel as described above, the sound absorber 8 whose surface and side surfaces are covered with the punching metal 7
is integrally fitted into the frame-shaped box body having the eave plate 4 without any gaps, so the punching metal 7 engages with the inner peripheral surfaces of the side plate 3 and the eave plate 4, and the sound absorber 8 The box body (frame-shaped sound insulating body made of GRC) 1 is securely held within the internal cavity and will not easily come out, and the box body is also supported by the back and bottom plate of the sound absorbing body 8 fitted in the internal cavity. 2
Since the sound absorbing body 8 is solidified in a locked state, the sound absorbing body 8 does not shift and can maintain a high sound absorbing effect, compared to a case where a sound absorbing material is applied after solidifying.

Furthermore, when a load is applied to the box body, since the GRC is in an engaged state where it bites into the many holes of the punching metal 7, there is no displacement between the two, and therefore the box body is reinforced by the punching metal 7. Even with such reinforcement, the thickness of the box does not increase, and the weight of the box as a whole does not increase, making it possible to obtain a sound insulating body 1 with high strength.

Moreover, the strength of the sound insulation body itself is
Since the GRC board is folded twice and bent to form a frame-like box, it is effectively reinforced by short glass fibers 9 that are almost parallel to the surface in any cross section, which was previously the weakest. The corner portions have the effect of being significantly strengthened by the continuous flow of intertwined short glass fibers.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the soundproof panel of this invention, Fig. 2 is a sectional view taken along the - line of Fig. 1, and Fig. 3 is a - of Fig. 1.
4 is a longitudinal cross-sectional view showing the arrangement of short glass fibers and the state of attachment of each member in the same example, and FIG. 5 is a cross-sectional view taken along the line, and FIG. FIG. 6 is a longitudinal cross-sectional view showing the arrangement of fibers, FIG. 6 is a cross-sectional view showing a conventional technique, and FIG. 7 is a vertical cross-sectional view showing another conventional technique. 1... GRC sound insulation body, 2... Bottom plate, 3... Side plate, 4... Eave board, 5... Opening, 7... Punching metal (perforated metal plate), 8... Sound absorbing body, 9
...Short glass fiber.

Claims (1)

[Scope of utility model registration request] A frame-shaped box body consisting of a rectangular bottom plate 2, a side plate 3 whose peripheral edges on all four sides of the bottom plate are bent upward at a right angle, and an eave plate 4 whose peripheral edges on all four sides of this side plate are further bent inward at a right angle. A sound insulation body 1 made of glass fiber reinforced cement made of unsolidified cement material reinforced with short glass fibers 9 oriented almost parallel to the plate surface in all cross sections;
It consists of a sound absorbing body 8 whose upper and side surfaces are covered with a perforated metal plate 7, and the sound absorbing body 8 is fixedly placed in the internal cavity of the sound insulating body 1 without forming a gap, and the two bodies are A composite sound insulation panel consisting of a sound insulation body and a sound absorption body made of glass fiber reinforced cement, characterized in that the sound insulation body and the sound absorption body are integrally attached to each other by exuding unsolidified cement material on all contact surfaces.