JPH031460B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the technology of sound-absorbing wall panels (hereinafter referred to as sound-absorbing panels) in movable partitions, particularly metal sound-absorbing panels. Furthermore, it also relates to the technique of installing the filling material.

Traditionally, metal sound-absorbing panels are made of mineral materials, including fillers, and are made by punching a metal top plate to create a large number of small holes. Rock wool or glass wool is used (for sound absorption). To prevent the filler fibers from popping out or spilling out of the small holes, they are sealed with non-woven fabric or cheesecloth. These metal sound-absorbing panels have a good sound-absorbing effect, and are well suited for the design of movable partitions in which metal panels are used, so they have come to be widely used.

However, there are more than a few problems. That is, since the top plate and the filler are joined by the method described below, they do not come into close contact with each other.
For this reason, it is difficult to maintain the surface of the top plate flat (flatness). When touched by wind or hands, it makes a gurgling noise. In addition to surrounding the soft fibrous filler inside, the panel frame has a large number of small holes, so the panel frame is made of many intermediate reinforcing materials and welded together to make them solid. There is. Of course, a metal plate can also be used for the back plate. For this reason, the weight of the panel itself increases, and in addition to the poor flatness mentioned above,
Because it is heavy, it is not suitable for use as a sound absorbing panel on the ceiling, for example.
It was not used and had the drawback of being very expensive as it required a lot of time and materials to manufacture. In addition, the cold gauze or non-woven fabric that serves to press down and close the small holes in the top plate gives an impression that the small holes in the metal top plate are conspicuous. It is said that there is also a problem with creating an atmosphere that makes people feel like they are
On the other hand, since working in front of a sound-absorbing panel causes eye strain, there are also requests for a material that is not too different from a metal top panel.

As shown in Figure 8, the conventional method for attaching filler material is to fix the intermediate reinforcing frame and edge frame to the punched top plate by spot welding, etc., and then attach the cheesecloth or non-woven fabric to the top plate. The filling material is placed on the inside and filled by pressing it in a single layer, and it is held down with a metal backing plate, and the backing plate and the frame are welded. In this case, the top plate and the filler are glued to each other with a sheet of adhesive interposed between them in a number of flat box shapes formed by the edge frame and the intermediate reinforcing frame. However, this adhesion is achieved through the mesh of cheesecloth or non-woven fabric, and is not always sufficient, and even if the top plate and the surface of the filler are closely bonded, the filler Since the material is a soft cotton-like fibrous material that dents when pressed with a finger, it does not have the flatness as seen in the above-mentioned top board. Furthermore, it is difficult to press the soft cotton-like filling material evenly into the flat box, and hygiene is poor.

In the present invention, the punched top plate and edge frame are made of metal, and the filler is glass cloth, which is a woven cloth made of glass fibers, and is made by winding mineral fibers such as glass wool tightly into a thick plate. Thin aluminum foil is applied to the entire surface of the back surface to provide the function or effect of the intermediate reinforcing frame and the back plate, and these materials can be attached using adhesives without using any connecting means such as welding or fitting. This is a creative work.

An embodiment of the present invention will be described below with reference to the drawings. The present invention comprises a top plate 1 made of metal, an edge frame 2, 2, 2, 2 and a filling plate 3 also made of metal.

As shown in Figure 1, the top plate 1 is a panel-sized flat metal plate with many small holes 4, 4, etc. punched in it, and in the example shown, the left and right edges are punched inward at right angles. The tip is bent twice outward at right angles to form hook-shaped connecting pieces 5, 5 at the tip, and the upper and lower edges are slightly bent inward to form end stops 6, 6.

The edge frame 2 is a horizontally long frame member having an L-shaped cross section.

The filling plate 3 is made by wrapping a mineral fiber filler such as glass wool or rock wool tightly into a thick plate shape with a glass cloth 7 made of woven glass fiber, and closing the edges with adhesive to make it panel-sized. A thin aluminum foil 8 is adhered to the entire back surface with an adhesive. In the illustrated embodiment, glass wool 9 is used as the filler. The shape and structure of the filling plate 3 are as shown in FIG.

The production procedure for the sound absorbing panel 10 of the present invention is as follows:
Along the back side near the edge of the frame 2, 2, 2, 2
Attach them with adhesive on the left, right, top and bottom to form a flat box shape. Into this flat box shape, the filling plate 3 is tightly fitted in one pie with the aluminum foil 5 portion facing outward.
It is attached with adhesive. The situation can be seen in FIGS. 2 and 4 to 6. Figure 2 shows the back side of the sound absorbing panel 10, where the filling plate 3 can be seen, but there is no back plate, and the glass cloth 7, aluminum foil 8, edge frames 2, 2... and the back side of the top plate 1 can be seen. Only.

Next, the sound absorption efficiency of the sound absorption panel 10 of the present invention will be shown using the experimental graph of FIG. 7 and the same table. The present invention is compared with a conventional sound absorbing panel 12, in which, as shown in FIG. 8, a top plate 1, a frame 2, 2, . , is a metal sound absorbing panel which is the same as the present invention, but also has intermediate reinforcing members 13, 13, . . . and an upper back plate 14. In addition to laying cheesecloth 15 on the top plate 1 and filling it with glass wool 9 in a frame divided into several flat box shapes, spot welding can be used to join the edge frame 2 and intermediate reinforcing material 13. Another difference from the present invention is that the thickness of the top plate 1 of the present invention is 0.6 mm, whereas the thickness of the conventional sound absorbing panel 12 is 0.8 mm.

The sound absorbing panel 10 of the present invention is the "A" line in the line graph, and the conventional sound absorbing panel 12 is the "B" line.
It is a line thing. As is clear from this graph and table, the excellent sound absorption effect of the metal sound absorbing panel (shown as the conventional sound absorbing panel 12) is also achieved in the sound absorbing panel 10 of the present invention.

Next, regarding the flatness of the top plate 1 of the sound-absorbing panel, when similarly compared with the conventional sound-absorbing panel 12, it is found that the conventional sound-absorbing panel 12 has a difference in unevenness (in mm) between the vertical and upper panel surfaces by 3/1000. In contrast, the method of the present invention has a good efficiency of 1/1000 or less. This is achieved by the filling plate 3 and adhesive of the present invention.
That is, the glass cloth 7 is well bonded to the top plate 1 and the edge frame 2 with an adhesive, and the glass wool 9 is tightly wrapped in a thick plate shape by the glass cloth 7, so that it does not fit the conventional futon surface. This is because they are not in such a state.

Note that the conventional sound absorbing panel 12 uses a metal back plate 14 to play a part in the sound absorbing effect, but in the present invention, the thin aluminum foil 8 plays this role together with the glass cloth 7.

Next, the strength of the sound-absorbing panel 10 of the present invention is stronger than that of the conventional sound-absorbing panel 12, and there is no effect at all when a person pushes or lightly hits it, and the strength is comparable to that of a general partition panel. In the present invention, the intermediate reinforcement 1
3 and a back plate 14, and the strong joining method of spot welding is not used, its outstanding effects can be clearly seen. Conventional sound absorbing panel 12
In the present invention, the noise caused by the wind or human touch does not occur. This is because the glass cloth 7 and the top plate 1 are fully bonded with adhesive, and the top plate 1 is integrally supported by the hard and thick filling plate 3.

In addition, the present invention has almost solved the problems of eye fatigue and stress caused by the feeling of being closed, as requested by consumers. That is, in the present invention, cheesecloth 1
Unlike the black color of 5 and the color of the non-woven fabric, which has a clear pattern in the small holes 4, 4..., the glass cloth 7 has a pattern in the small holes 4, 4... that is the same as the metal color of the top plate 1 or looks strange. However, experiments have shown that when working in an environment where the sound absorbing panel 10 of the present invention is viewed from a distance of 1 meter, unlike the conventional sound absorbing panel 12, the user does not experience eye fatigue at all. The impression received from the top plate 1 of the present invention is that the presence of the small holes 4, 4, . . . is not very strongly perceived.

Next, the present invention has the amazing effect of reducing the manufacturing time by 40% compared to the conventional sound absorbing panel 12. This is naturally brought about by what I have said repeatedly so far. That is, in the conventional sound absorbing panel, the top plate 1, the edge frame 2, and the intermediate reinforcing material 1
3 by spot welding or gluing, apply adhesive film (sheet), spread cheesecloth 15 etc. on top of it, fill with soft glass wool 9 material etc. which is difficult to handle and generates fine dust, and then metal backing plate 1
This is because, unlike the complicated work of holding the parts together using a 4-way clamp and welding them, the present invention can perform the work extremely easily as described above.

Along with this, the production cost (cost) will also be reduced by approximately 30%.
saw a decrease in It is possible to use a thinner front plate 1, and there is a saving in materials since the back plate 14 and intermediate reinforcing material 13 are not used.

Note that the above-mentioned reduction in the back plate 14 and the like results in a weight reduction of the sound absorbing panel 10 of the present invention, resulting in a weight reduction of 56% compared to the weight of the conventional sound absorbing panel 12. This suggests that the present invention will not only be used as a partition wall, but also as a sound absorbing panel 10 for ceilings, and that the present invention will be utilized as a sound absorbing device for the entire room excluding flooring. obtain.

As shown in FIG. 9, two sound absorbing panels 10, 10 can be used as a partition between two rooms, with the filling plates 3, 3 facing each other back to back. Furthermore, it can be expected to be used as a noncombustible panel due to the materials used.

As explained above, the present invention is a creation that is excellent in terms of panel strength, aesthetics, livability, economic efficiency, usability, and non-combustibility, in addition to the sound absorption effect.

Note that if powder adhesive is used, the small holes 4
The parts have a good finish and are convenient for work efficiency.

[Brief explanation of the drawing]

FIG. 1 is an elevational view of a sound absorbing panel 1 according to an embodiment of the present invention, FIG. 2 is a rear view of the same, and FIG. 3 is a partially cutaway sloped surface of a filling plate 3. 4 is a cross-sectional view of the sound-absorbing panel 10, FIG. 5 is a longitudinal cross-sectional view, and FIG. 6 is a partially omitted perspective view showing the structure of the sound-absorbing panel 10. 7 is an experimental graph and table of the sound absorbing panel 10 of the present invention and the conventional sound absorbing panel 12, and FIG. 8 is a cross-sectional view of the conventional sound absorbing panel 12. FIG. 9 is a longitudinal sectional view showing an example of use of the present invention. Code, 1...Top plate, 2...Edge frame, 3...Filling plate, 4...Small hole, 7...Glass cloth, 8...Aluminum foil, 9...Glass wool, 10...Sound absorbing panel

Claims (1)

[Claims] 1 A large number of small holes are punched into a panel-sized flat metal plate to form a front plate, and a metal frame with an L-shaped cross section is attached with adhesive to the left and right and top and bottom edges of the back of this front plate. It is made by wrapping a mineral fibrous filler such as glass wool or rock wool tightly into a thick plate shape with a glass cloth made of woven glass fiber to form a panel size. A sound-absorbing panel comprising a filler plate having a thin aluminum foil adhered flush to the back side thereof, and adhered with adhesive inside the flat box shape with the aluminum foil portion facing outward.