JPH0137131B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a sound absorbing screen in a metal movable partition for OA (abbreviation for office automation) equipment.

In order to reduce the impact of the noise generated by OA equipment on offices, etc., conventional sound-absorbing screens are made of cloth, but their sound-absorbing efficiency is not as good as that of the latter. However, there were few designs that matched (similar) to the interior.

The metal sound-absorbing screen for OA equipment according to the present invention is
The entire structure is made mostly of metal, with panting (perforated holes, the same applies hereafter) on the top plate, and glass wool used as a filler inside, resulting in an unprecedentedly high sound absorption coefficient and an excellent design. It was taken as a thing.

The configuration and effects of the present invention will be explained below with reference to the drawings while comparing them with conventional ones.

Figure 1 shows a sound-absorbing screen 1 for OA equipment manufactured by a conventional manufacturing method, in which a thick cloth (woven fabric) such as wool is pasted on a frame made of metal, wood, or resin. It has a section. This includes not only cloth but also cloth with urethane foam layered over it.

FIG. 2 shows a metal sound-absorbing screen 2 for office automation equipment according to the present invention. The metal sound-absorbing screen 2 consists of a metal top plate 3, back plate 4, frame 5, legs 6, cap 7, corner pillars 17, and glass wool material 8 as a filler. The top plate 3 is provided with panting 9, and the total panting 9 for the entire area of the top plate 3 is
The aperture ratio of 9... may be about 20 to 5%. Back plate 4
No punching 9 was applied to the plate. The end parts of a front plate 3 and a back plate 4 are joined together without a gap to form a panel body 10.
A sound absorbing board 11 is made by filling the inside of a panel body 10 with glass wool material 8 and laying cheesecloth 14 on the surface that contacts the top plate 3.

The pattern of panting 9 shown in Fig. 3 is visually beautiful (design) as well as in this example.
The shape and number of the patterns are not limited as long as they are of good quality and the strength of the top plate 3 is maintained.

The assembly of the embodiment of the present invention will be described with reference to FIG. 4. The lower end portion 13 of the sound absorbing plate 11 is supported by the lower portion of the rectangular frame 5 assembled on the legs 6. In this figure and FIG. 5, two sound absorbing plates 11 are used facing each other, and an air layer 14 is formed with a space between the back plates 4, 4, but one suction tube plate 1
In this case, another back plate 4 is installed next to the air layer portion 14. The sound absorbing plate 11 and other back plate 4 are connected to the upper part of the frame 5 (numeral 15 in the upper part).

A metal sound-absorbing screen 2 is made by fitting and connecting a cap on it, and attaching baseboard pieces 16, 16 that cover the legs 6.

The metal sound absorbing screen 2 manufactured by this manufacturing method may be used alone or connected in one direction. FIG. 5 shows an example in which the metal sound-absorbing screens 2, 2 are deployed in two directions via the corner pillars 17, and even in the case of three-way deployment, the metal sound-absorbing screens 2, 2 are deployed with the corner pillars 17 on three sides, respectively. This can be easily done by connecting 2 and 2.

FIG. 6 shows a state in an office where office equipment 18 is placed on a desk 19 and a chair 20 is placed in front of the embodiment of the metal sound-absorbing screen 2 according to the present invention which is expanded in two directions.

For example, from the direction of the arrow in Figure 4, OA
If the sound (sound) of the equipment 18 is directed towards the sound absorbing plate 11, the sound will directly pass through the cheesecloth 12 (which acts as a stopper for the glass wool material 8) in the pantings 9, 9... It is absorbed by the glass wool material 8. The sound hitting the metal of the top plate 3 causes the metal top plate to vibrate, except for the reflected sound, which is also absorbed by the glass wool material 8. The sound passing through the glass wool material 8 causes the metal plate of the back plate 4 to vibrate, but it has already become extremely small, and most of it is diffused and attenuated in the air layer 14. According to the metal sound-absorbing screen 2 shown in FIGS. 4 and 5, two sound-absorbing plates 11 are used facing each other, and OA equipment 18, 1 is used in both parts.
Even if 8 is used, there will be no problem with working noise.

The sound absorption effect is shown in Figure 7 based on experimental data.
Sample No. 2 is a sound-absorbing screen 1 for OA equipment with cloth attached, sample No. 2 is a sound-absorbing screen 1 in which urethane foam is layered on cloth, and sample No. 3 is a sound-absorbing screen 2 made of metal according to the present invention. It is.

As is clear from this diagram, the sound absorption coefficient of both No. 1 and No. 2 produced by the conventional manufacturing method is less than 0.1 in the center frequency range of 250 to 2000 Hz centered around 500 Hz. In contrast, No. 3 according to the present invention has a low value of about 0.4 in the same area.
It shows an excellent sound absorption coefficient of 0.7.

According to the present invention, it is possible to manufacture a metal sound-absorbing screen 2 that exhibits an extremely high sound absorption coefficient. The design of pattern 9 also has the effect of adding a modern feel and beauty to the office interior.

Today, office automation equipment 18 is becoming more and more popular, but there is still a strong tendency for office equipment to be manufactured using conventional methods. Like the sound absorbing screen 1 mentioned above. There is also a tendency for many new sound generating devices to be added. The metal sound-absorbing screen 2 according to the present invention is therefore not only used as a sound-absorbing screen for booth partitions related to OA equipment 18, but is also expected to be used as a sound-absorbing partition when other sound generating equipment is used.

[Brief explanation of drawings]

FIG. 1 is an elevational view of a sound absorbing screen 1 manufactured by a conventional manufacturing method, and FIG. 2 is an elevational view of a sound absorbing screen 1 according to an embodiment of the present invention.
FIG. 3 is an elevational view of the metal sound-absorbing screen 2, and FIG. 3 is a partially enlarged view showing nine panting patterns thereof;
FIG. 4 is a longitudinal cross-sectional view of the metal sound-absorbing screen 2 according to the embodiment of the present invention, FIG. 5 is a cross-sectional view showing the same developed in two directions, and FIG. FIG. 7 is a chart showing experimental data of sound absorption coefficient measurements for the sound absorption screen 1 manufactured by the conventional manufacturing method and the metal sound absorption screen 2 according to the present invention. Code, 2: Metal sound-absorbing screen, 3: Top plate, 4: Back plate, 5: Frame body, 6: Legs, 7: Kasagi, 8: Glass wool material, 9: Panting, 10: Panel body,
11: sound absorption board, 12: cheesecloth, 14: air layer part,
17: Corner pillar.

Claims (1)

[Scope of Claims] 1. A partition device used to absorb sound emitted by OA equipment, etc., which (a) is surrounded by a metal top plate and a back plate, and the inside thereof is filled with glass wool material; Cheesecloth is laid on the back of the top board, many decorative pantings are applied to the top board, and sound absorbing board is made without panting on the back board, metal legs, frame, caps, and corners. (b) Attach a sound-absorbing plate to the frame and place another backing plate behind the backing plate with an air space between them, or install two sound-absorbing plates facing each other, with a space between the backing plates. Create and fix an air layer, attach legs and caps to create a metal sound-absorbing screen, and if it is deployed in two or more directions in front of OA equipment, use a continuous metal sound-absorbing screen with corner pillars in between. A method for manufacturing a metal sound-absorbing screen for office automation equipment.