JP2001140225A - Sound absorbing board to be attached to rigid wall surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost for a sound absorbing board on a wall surface having rigidity such as concrete and improve the workability. SOLUTION: This sound absorbing wall construction has sound absorbing boards 10 attached to a wall having a rigid wall surface such as concrete or the like. The sound absorbing board 10 has a sound absorbing material 13 filled inside a flat box 11, and the sound absorbing material 13 is supported by rods 14 crossing between opposite edges on the rear surface of the opening of a box 11. The rear surface of the sound absorbing board 10 is open and has no cutout effect but the sound passed the rear surface is reflected by the rigid wall surface and cut off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing wall structure in which a sound absorbing plate is attached to a hard wall surface of concrete or the like, and to the sound absorbing plate.

[0002]

2. Description of the Related Art For example, as shown in FIG.₁And one
General Road R_TwoOn the road with
R₁Soundproof wall W on the side₁And the lower row of general
Road R _TwoSoundproof wall W on the side_TwoStanding up when passing vehicles
In addition to blocking the sound transmission that occurs at the side,
Road R₁Sound absorbing wall (reflection blocking wall) W_ThreeProvided
To block and absorb acoustically reflected waves from the
Minimize noise pollution to the residents around the road network
I am trying to.

The soundproof walls (sound absorbing walls) W ₁ , W ₂ , W
₃ (hereinafter referred to as W) has a basic structure in which a sound absorbing layer made of glass wool or the like is formed in a flat box, and the opening surface of the box is covered with a perforated metal plate such as punching metal. Performs a sound absorbing action based on the principle of the Helmholtz resonator, and then converts sound energy into heat energy (vibration energy) by friction, viscous resistance, etc. in the sound absorbing layer to absorb sound (Japanese Patent Laid-Open No. 6-3169).
No. 78, etc.).

[0004]

In the sound barrier structure as described above that INVENTION SUMMARY is], the sound absorbing wall W ₃ elevated rear surface, the sound absorbing plate P itself is used as a scaffold for the back check viaduct, for example,
As shown in FIGS. 8 and 9, first, the cross beam 2 is provided at an appropriate position in the length direction of the I-girder 1 between the piers, and the vertical beam 3 is appropriately provided on the lower surface of the cross beam 2. In addition, the transverse beams 4 for mounting the sound absorbing plate P are provided at intervals of 2 m.

Next, a mounting rod 5 is screwed on the upper surface of each sound absorbing plate P, and the mounting
Thereby, the sound absorbing plates P are attached to the cross beams 4 in parallel. The bolt 7 of the mounting bracket 6 is prevented from dropping through a wire 8 or the like (see Japanese Patent Application Laid-Open No. 10-212710).

The sound absorbing plate P used as a scaffold as described above
For example, a thick iron plate is used on the surface on which a person rides, that is, on the back surface, in order to secure strength as a scaffold.

[0007] The sound absorbing plate P, which also functions as a sound insulating plate, must absorb sound waves incident from the front surface, and must prevent at least the sound waves that could not be absorbed from transmitting to the rear surface. It is known that the transmitted sound is proportional to the logarithm of the surface density of the material, and a heavy steel plate is adopted as the material of the back plate of the sound insulation plate which is usually used. Further, if there is a gap between the sound insulating plates or between the sound insulating plate and the mounting member, the transmission loss is significantly reduced, so that a high hermetic structure including the sound insulating plate itself is required.

However, when the sound absorbing plate is installed on a rigid wall surface made of concrete or the like, there is no problem even if the above-described elevated back sound absorbing plate or the sound insulating plate is directly attached.
Since there is already a concrete wall surface corresponding to a back plate having a necessary and sufficient surface density, the back plate is unnecessary for the sound absorbing plate itself. The back plate is the heaviest member among the sound absorbing plates. Without this, it is naturally inexpensive, and of course, the mounting work is reduced by the weight reduction, so that the erection work can be performed in a short time.

An object of the present invention is to reduce the cost and improve the workability of a sound-absorbing wall structure in which a sound-absorbing plate is attached to a hard surface of concrete or the like, while keeping the above points in mind.

[0010]

In order to achieve the above-mentioned object, the present invention focuses on the fact that the above-mentioned back plate is unnecessary, and makes the sound absorbing plate open at the back.
Even at the back opening, there is no problem because the rigid wall functions as a sound insulating plate.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the sound absorbing wall structure of the present invention, in a sound absorbing wall structure in which a sound absorbing plate is attached to a hard surface of concrete or the like, the sound absorbing plate has an opening having no sound insulating effect on its rear surface. Configuration. The sound absorbing material is loaded in the flat box, and the sound absorbing material is supported by a rod bridged between opposing edges on the back of the opening of the box. In this sound absorbing plate configuration, the bridging rod holds the sound absorbing material and increases the strength (rigidity) of the entire sound absorbing plate.

[0012]

1 and 2 show an embodiment of the present invention. In a sound absorbing plate 10 of this embodiment, a box-shaped main body 11 is formed from a perforated metal plate such as a punching metal in a pressed material form. The holding rod 14 of the reinforcing and sound absorbing material 13 is mounted on the rib 12 at the back opening edge by screwing and riveting. In the figure, 17 is a temporary fixing piece.

As shown in FIGS. 3 and 4, this sound absorbing plate 10 has a mounting bracket 16 in the vertical direction bolted to a concrete side wall surface W of a cut-away road, and a bracket 15 is connected to the mounting bracket 16 via a bracket 15. Bolt. At this time, FIG.
As shown in (1), the temporary fixing piece 17 is engaged with a receiving piece 18 provided at an appropriate position in the vertical direction of the mounting bracket 16, and the sound absorbing plate 10 is temporarily installed on the mounting bracket 16, and in this state, bolted. In this manner, the sound absorbing plates 10 are attached to each other so as to have a required width and a required height, thereby constructing a sound absorbing wall having a required width.

The sound absorbing wall exerts a sound absorbing function by the sound absorbing function of the sound absorbing plate 10, and the sound transmitted through the sound absorbing plate 10 is reflected by the rigid wall surface because the back surface of the sound absorbing plate 10 is open. , Again penetrates through the sound absorbing material and is further absorbed.

It should be noted that the present invention is not limited to the moat road side wall, but may be any of various rigid walls such as the walls W ₁ , W ₂ , W ₃ , the factory site boundary wall, and the building side wall in FIG. Needless to say, it can also be adopted. At this time, as shown in FIG. 6, in the case of a horizontal wall W such as the backside of an elevated road, a horizontal mounting bracket 16 is bolted to the wall W, and a sound absorbing plate is attached to the mounting bracket 16 via a bracket 15. 10 and the bracket 16 is bolted to the sound absorbing plate 1.
Install 0. In this embodiment, the bracket 15 is upside down from that of FIG.

[0016]

As described above, according to the present invention, since there is no back plate of the sound absorbing plate, the sound absorbing plate and the sound absorbing wall can be made inexpensive and the weight can be reduced. As a result, the work of installing the sound absorbing plate is reduced, and the erection work can be performed in a short time.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of a sound absorbing plate.

FIG. 2 is a perspective view of a top cutaway of the embodiment.

FIG. 3 is a front view showing a working state of the embodiment.

FIG. 4 is a cut-away side view of the working state of the embodiment.

[Fig. 5]

FIG. 6 is a cut-away plan view of another embodiment of the embodiment.

FIG. 7 is a schematic view of one embodiment of a soundproof wall.

8 is a schematic right side view of FIG.

FIG. 9 is a perspective view of the main part.

[Explanation of symbols]

P, 10 sound-absorbing plate R ₁ elevated road (expressway) R ₁ general road W ₁ , W ₂ , W ₃ sound-insulating wall 1 elevated road support girders 2, 3, 4 beams 11 box-shaped main body of sound absorbing plate 12 edge rib 13 Sound absorbing material 14 Sound absorbing material holding rod 15 Mounting bracket 16 Mounting bracket 17 Temporary fixing piece 18 Receiving piece

Continued on the front page F term (reference) 2D001 AA05 BA01 BB01 CA01 CB02 2E001 DF04 EA01 FA03 FA30 GA01 GA07 GA18 GA55 LA01 LA11 LA12

Claims (2)

[Claims] 1. A sound absorbing plate 1 provided on a hard wall surface of concrete or the like.
0 is attached to the sound absorbing wall structure.
A sound-absorbing wall structure with a rigid wall, the back of which has an opening with no sound insulation effect. 2. A sound-absorbing plate 10 used for the sound-absorbing wall structure according to claim 1, wherein a sound-absorbing material 13 is loaded in a flat box 11, and the sound-absorbing material 13 is provided on the back of the opening of the box 11. A sound absorbing plate mounted on a rigid wall surface, which is supported by a rod 14 spanned between opposed edges.