JPH0339837Y2 - - Google Patents

Description

[Detailed explanation of the idea]

Industrial Application Field This invention relates to soundproof panels. Conventional technology Traditionally, glass fiber reinforced cement (hereinafter referred to as GRC
), and a box-shaped one with a side plate standing upright on the periphery of the bottom plate is known. Problems to be Solved by the Invention However, the above-mentioned soundproof panels are manufactured by spraying GRC on the bottom plate of a box-shaped formwork, building an inner formwork on top of the GRC, and placing premix GRC between the formworks. The bottom plate and the side plate are formed separately, with the reinforcing short glass fibers having random orientation, such that the reinforcing short glass fibers are filled to form the side plate. For this reason, the strength of GRC in the thickness direction is low, and especially as shown in Fig. 7, the bottom plate 2
There is no connection between the short glass fibers 28 at the corner (rising part from the periphery of the bottom plate to the side plate) A formed by the side plate 23 and the side plate 23, and the plate thickness direction and the corner are likely to break under load. If the wall thickness is increased as much as possible, the weight will increase. In addition, attempts have been made to compensate for this by inserting reinforcing bars in the longitudinal direction of the bottom plate or side plate, but this increases weight and manufacturing man-hours, and the problem of separation between the side plate and bottom plate cannot be solved. It was hot. The purpose of this invention is to eliminate the problems of the conventional ones as described above, and to provide a high-strength soundproof panel that does not increase the thickness and is difficult to break even at the corner between the bottom plate and the side plate. shall be. Means for Solving the Problems In order to achieve the above object, the soundproof panel 1 of this invention has a rectangular bottom plate 2 and a peripheral edge of the bottom plate bent upward as shown in FIGS. 1 to 3. A box made of GRC, which has side plates 3 and eaves plates 4 formed by bending the upper ends of the side plates inward, an opening 5 is formed between the eaves plates 4, and the whole is integrally formed. An inorganic-containing vinyl chloride foam 12 having a rectangular cross section and a square frame shape is placed along the inner peripheral surface of the side plate 3 under the body and the eave plate 4 of this GRC box body. In addition, a GRC frame 13 is attached to the inner surface of the inorganic-containing vinyl chloride foam 12 and the inorganic-containing vinyl chloride foam 12 and This is characterized in that the eaves plate 4 and the bottom plate 2 are attached without any gap being formed between their peripheral edges. Function According to the soundproof panel 1 which is made of GRC as described above and is solidified after continuously bending and forming the peripheral edge with the bottom plate 2 as the base, the corner formed by the bottom plate 2 and the side plate 3 as shown in FIG. Also in section A, the short glass fibers 8 are connected and arranged uniformly, so the strength of the short glass fibers 8 is fully utilized, preventing breakage and cracking at corner A, and reducing the weight. will not increase. Further, the soundproof panel 1 as described above is reinforced with a GRC frame 13 attached to the inner surface via an inorganic-mixed vinyl chloride foam 12, and can be used as an inner formwork. Since there is no need to disassemble the product, it can be manufactured easily. Example As shown in Figures 1 to 3, 1 is GRC
This soundproofing panel 1 includes a rectangular bottom plate 2, a side plate 3 formed by bending the peripheral edge of the bottom plate 2 upward, and an upper end of the side plate 3. It has eaves plates 4 bent inward, and openings 5 are formed between the eaves plates 4. Below the eave plate 4, along the inner circumferential surface of the side plate 3, an inorganic-containing vinyl chloride foam 12 and a G.I.
The RC frame body 13 is integrated with the GRC box body, that is, there is no gap formed between the peripheral edge of the bottom plate and the side plates 3 and the eaves plate 4. 12 through G.
The RC frame is fixed and installed. When manufacturing the soundproof panel 1 as described above, as shown in FIG. 4, the bottom plate form 2', the side plate form 3', and the eave plate form 4', which are pivotally supported to each other, are placed in a horizontal state. On top of these, GRC of a predetermined width and constant thickness is cast in the form of a sheet, in which a large number of short glass fibers of about 2 to 4 cm are mixed in the horizontal direction and continuously drawn out from a feeder (not shown), and has a predetermined width and a constant thickness. Then, before it hardens, a GRC frame 13 is attached to the inner surface of the GRC sheet, and an inorganic-containing vinyl chloride foam 1 is attached as the frame-shaped inner formwork.
2 with the side panels left, and the bottom plate formwork 2'
The side plate formwork 3' is bent against the side plate formwork 3', and the eave plate formwork 4' is bent against the side plate formwork 3', respectively, and the sheet is bent over the GRC cast as described above, as shown in Fig. 2. shape and solidify. After the sheet is bent, an embedded nut for lifting and mounting is set in the corner formed with two adjacent side plates 3, and the vicinity is filled with GRC. Each formwork 2',
When dismantling 3' and 4', attach GRC frame 1 to the inner surface.
Inorganic mixed vinyl chloride foam 12 attached with 3
The product is manufactured as is without being removed. In this way, the soundproof panel 1 is formed. In the soundproof panel 1 formed in this way, the corner cross section is integral as shown in FIG. 5, and the short glass fibers 8
becomes directional, increasing the breaking strength in that part. In addition, GRC frame 13 and GR
Since the rectangular frame-shaped inorganic-mixed vinyl chloride foam 12 is interposed between the C box body and the GRC frame body 13, the inner formwork for forming the side plate 3 can be used without increasing the thickness of the GRC frame body 13 more than necessary. It can be made to act as In the drawing, 7 indicates soundproof panel 1 as required.
It is a glass net embedded in. Inorganic-containing vinyl chloride foam 1 of the above example
As shown in FIG. 6, the soundproof panel 1 having a frame body 13 made of GRC and the soundproof panel having only a box body made of GRC without the inorganic vinyl chloride foam 12 are inverted as shown in FIG. When a weight was placed on the top to distribute the load equally, a strength test was conducted, and the results shown in Table 1 were obtained. The conventional product cracked under a load of 250 kg.

[Table] Effects of the invention Since this invention is configured as described above, it is possible to obtain a soundproof panel with high strength without increasing the thickness of the panel, and it is easy to manufacture and the product can be supplied at low cost. In particular, a frame-like body made of inorganic-containing vinyl chloride foam and a GRC frame, both of which have a rectangular cross section and a rectangular frame shape, are tightly attached to the inner surface of a GRC box body, and is used as an inner formwork during production.
Since it remains integrally enclosed in the box body, the strength is further increased (7.2 times stronger compared to the product described in the conventional technology, and 25 times stronger than the product without the inner packaging material of this invention). % UP) and retain the soundproof panel, and there is no need for the troublesome work of dismantling the internal frame, which is normally used for dividing after solidifying the GRC box, and it can be turned into a product as is. Since it is possible, it has the excellent effect of being easy to manufacture.

[Brief explanation of drawings]

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 cross-sectional view taken along the line - of Fig. 2.
Figure 4 is a longitudinal cross-sectional view obtained during manufacturing, Figure 5 is a longitudinal cross-sectional view showing the arrangement of short glass fibers in the soundproof panel of this invention, and Figure 6 is a strength test. FIG. 7 is a vertical sectional view showing the arrangement of short glass fibers in a conventional soundproof panel. 1...Soundproof panel, 2...Bottom plate, 3...Side plate,
4... Eave board, 5... Opening, 8... Short glass fiber, 12... Inorganic mixed vinyl chloride foam,
13...GRC frame body.

Claims (1)

[Scope of utility model registration request] It has a rectangular bottom plate 2, a side plate 3 formed by bending the peripheral edge of the bottom plate upward, and an eave plate 4 formed by bending the upper end of this side plate inward, and an opening is formed between the eave plates 4. 5, and a box made of glass fiber reinforced cement which is integrally formed as a whole, and a cross section along the inner peripheral surface of the side plate 3 below the eave plate 4 of this box made of glass fiber reinforced cement. Rectangular frame-shaped mineral-containing vinyl chloride foam 1
2 are integrally fixedly arranged between the side plates 3 and the eaves plate 4 and the peripheral edges of the bottom plate 2 without forming any gaps, and furthermore, the inner surface of this inorganic-containing vinyl chloride foam 12 is coated with glass fiber reinforced cement. Frame body 1
3 is attached to the inorganic-containing vinyl chloride foam 12 and the periphery of the eave plate 4 and the bottom plate 2 without any gap being formed therebetween.