JP3647252B2 - Sound absorption panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention mainly relates to a sound-absorbing panel that is attached to a lower surface portion, a wall surface, a ceiling surface, or the like of a structure such as a tunnel, a moat split, or a semi-underground road, in order to absorb noise associated with traveling of a vehicle or the like.
[0002]
[Prior art]
Conventionally, there are various types of sound absorbing panels for absorbing noise associated with traveling of vehicles, etc., depending on the location where they are installed, for example, as soundproof walls along highways and railway lines As the sound absorbing panel, a sound absorbing material is housed in a panel frame that is rectangularly formed by upper and lower frame members and left and right frame members, and a perforated plate having a large number of through holes is arranged on the front side of the panel frame. In general, a non-porous sound insulating plate is provided on the back side. The sound insulating plate is for preventing noise that has entered the panel frame from the perforated plate on the front side from being transmitted along the line from the back side.
[0003]
In addition, sound absorbing panels that are installed on the bottom surface, wall surface, ceiling surface, etc. of structures such as tunnels, moat splits, and semi-underground roads do not need to prevent noise from being transmitted to the back side by sound insulation plates. In addition, a sound insulation board is not particularly provided. For example, as shown in FIG. 6, a plurality of cross members a are provided between the upper and lower frame members b and c so that the sound absorbing material does not fall off the panel frame during transportation and transportation. It is only installed vertically. Although not shown in the figure, noise that has entered the panel frame from the perforated plate on the front side is absorbed by the sound absorbing material, and part of the noise is reflected by the lower surface, wall surface, ceiling surface, etc. The sound is absorbed by the material.
[0004]
[Problems to be solved by the invention]
However, a sound absorbing panel without such a sound insulation plate is easily twisted and unstable due to the absence of the sound insulation plate when a rotational moment is applied about the longitudinal direction, and handling during transportation and transportation is extremely difficult. It was troublesome.
[0005]
Accordingly, the present invention is to provide a sound absorbing panel that does not have a sound insulating plate on the back surface side, solves the above-described problems, and increases the torsional rigidity to make it difficult to twist.
[0006]
[Means for Solving the Problems]
As a result of intensive research on how to make it difficult to twist in a sound-absorbing panel not provided with a sound insulating plate on the back side, the present inventor observed this twist phenomenon when the twist angle was small, that is, at the initial stage of twist. As shown in FIG. 6, the upper and lower frame members b and c are twisted by parallel translation in the left and right direction while keeping the distance between them substantially constant, and in the conventional sound absorbing panel, the upper and lower frame members b and c A crosspiece member a is installed between the upper and lower frame members b and c. If the crosspiece member a is installed perpendicularly to the upper and lower frame members b and c, the parallel movement of the upper and lower frame members b and c cannot be suppressed. In order to suppress the parallel movement of the frame material, it is known that if the crosspiece member is installed obliquely with respect to the upper and lower frame materials, the torsional rigidity is increased and the parallel movement can be suppressed extremely effectively. It came to complete.
[0007]
That is, the sound-absorbing panel of the present invention is a perforated plate in which a sound-absorbing material is housed in a frame panel formed by a rectangular frame by upper and lower frame members and left and right frame members, and has a large number of through holes on the front side of the frame panel. And a pressing member that presses the sound absorbing material to the back side is provided between the perforated plate and the sound absorbing material. On the back side of the frame panel, the sound absorbing material is exposed and the sound absorbing material falls off from the back side. It bridges the crosspiece member is one or more vertical frame members to prevent the, the crosspiece member is or if it is plural spans at least one of the crosspiece member is laid obliquely with respect to the vertical frame members Thus, it is also provided with a function as a structural material for increasing torsional rigidity .
[0008]
According to the present invention, one or more crosspiece members are installed between the upper and lower frame members on the back side, and when the crosspiece member or a plurality of crosspiece members are installed, at least one of the crosspiece members is Since it is installed obliquely with respect to the upper and lower frame members, torsional rigidity is increased by this obliquely installed crosspiece member, and it is difficult to twist.
[0009]
In the present invention, the perforated plate on the front side, the upper and lower frame members, and the left and right frame members may be formed separately, or the perforated plate and the upper and lower frame members may be formed. The frame body, or the perforated plate, the upper and lower frame members, and the left and right frame bodies may be integrally formed.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be specifically described with reference to the drawings.
1 is a front view showing an embodiment of the present invention, FIG. 2 is a rear view thereof, FIG. 3 is a sectional view thereof, and FIGS. 4 to 5 are explanatory views showing other embodiments of the present invention.
[0011]
In the drawings, reference numeral 1 denotes a frame panel, which is formed by upper and lower frame members 11 and 12 made of a metal such as a galvanized iron plate or a synthetic resin and left and right frame members 13 and 14 also serving as mounting brackets. It is.
[0012]
2 is a sound absorbing material installed in the frame panel 1, and the sound absorbing material 2 to be used is generally preferably made of glass wool or rock wool, but is made of metal fibers such as aluminum, metal Containing fibers with binders, metal powders, ceramic powders, sintered materials obtained by sintering short metal fibers, etc., and metal foam materials, organic foam materials, inorganic foam materials, etc. It may be a thing etc., and the kind in particular is not limited. The sound-absorbing material 2 is generally installed with its surroundings protected by a protective film.
[0013]
Reference numeral 3 denotes a perforated plate having a large number of through holes 31 provided on the front side of the frame panel 1, and noise enters the frame panel 1 through the through holes 31, and the sound absorbing material 2 in the frame panel 1 It is designed to absorb sound. The perforated plate 3 is generally formed from a metal plate, and in particular from an aluminum alloy plate or the like for weight reduction. Reference numeral 32 denotes a pressing member that presses the sound absorbing material 2 to the back surface side. In this embodiment, the perforated plate 3 on the front side, the upper and lower frame members 11 and 12, and the left and right frame members 13 and 14 are formed separately. Alternatively, the perforated plate 3 and the left and right frame members 13 and 14 may be formed integrally with the perforated plate 3, the upper and lower frame members 11 and 12, and the left and right frame members 13 and 14, respectively.
[0014]
Reference numeral 4 denotes a crosspiece member provided on the back side of the frame panel 1. In this embodiment, all three members are installed between the upper and lower frame members 11 and 12 by blind rivets or the like obliquely with respect to the upper and lower frame members 11 and 12. ing. The crosspiece member 4 prevents the sound absorbing material 2 from falling off from the back surface side, and increases the torsional rigidity by being installed obliquely. Note the beam member 4 has a function of preventing the falling of the noise absorbing member 2, and is provided with a function as a structural material to increase the torsional rigidity, in order to a function as a structural material crosspiece member 4, bars The member 4 is preferably made of a metal such as a galvanized iron plate having excellent strength, but may be formed of an aluminum alloy, a synthetic resin, or the like that has good moldability and corrosion resistance.
[0015]
In this embodiment, the three crosspiece members 4 are installed in an oblique manner, and all of them are installed obliquely. However, the crosspiece member 4 may be one piece or a plurality of pieces, but at least one piece is installed obliquely. If necessary, the number of crosspieces 4 and the number of crosspieces 4 installed obliquely are not particularly limited. For example, as shown in FIG. One piece may be installed vertically, and the remaining two pieces may be installed obliquely. Also, as shown in FIG. 5, three crosspieces 4 are installed, two left and right members are installed vertically, and the remaining one is installed obliquely. It may be erected.
[0016]
When a conventional sound absorbing panel in which a plurality of beam members are vertically installed is used as the sound absorbing panel according to the present invention, at least one of the plurality of beam members may be removed and installed obliquely, or newly This can be done by additionally installing at least one oblique beam member 4.
[0017]
【The invention's effect】
According to the present invention, one or more crosspiece members are installed between the upper and lower frame members on the back side, and when the crosspiece member or a plurality of crosspiece members are installed, at least one of the crosspiece members, Since it is installed obliquely with respect to the upper and lower frame members, the torsional rigidity is increased by this obliquely installed cross member, and it is difficult to twist.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
2 is a rear view of FIG. 1. FIG.
FIG. 3 is a cross-sectional view of FIG.
FIG. 4 is an explanatory diagram showing another embodiment of the present invention.
FIG. 5 is an explanatory view showing still another embodiment of the present invention.
FIG. 6 is an explanatory view showing a conventional sound absorbing panel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame panel 11 Upper frame material 12 Lower frame material 13 Left frame material 14 Right frame material 2 Sound absorbing material 3 Perforated plate 31 Through-hole 32 Holding member 4 Crosspiece member

Claims (2)

Sound absorbing material is furnished vertically frame members and the left and right frame members and are formed by the framework in a square shape by a frame panel, perforated plates provided with many holes on the front side of the frame panel, perforated plate A pressing member that presses the sound absorbing material to the back surface side is provided between the sound absorbing material and the back surface side of the frame panel is a cross member that prevents the sound absorbing material from being exposed and the sound absorbing material from falling off from the back surface side. A structure that is installed between one or a plurality of upper and lower frame members, and in the case where the crosspiece member or a plurality of crosspiece members are installed, at least one of the crosspiece members is installed obliquely with respect to the upper and lower frame members to increase torsional rigidity. A sound-absorbing panel characterized by having a function as a material .   The perforated plate and the upper and lower frame member, or the perforated plate and the left and right frame member, or the perforated plate, the upper and lower frame member, and the left and right frame member are integrally formed. The sound absorbing panel described.

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