JPS5825815B2 - Soundproof wall structure in which pillars are connected with damping joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a soundproof wall structure in which a cell type soundproof box is attached between pillars, and the support portions of the soundproof wall are covered with damping joints, and the vibration of the box is distributed.

In conventional soundproof walls, the structure of the support pillars remains exposed, so the soundproofing performance of the actually installed soundproof walls cannot be obtained as the experimental values in the test room.

The reasons for this are as follows.

1) The pillars themselves are simply iron or concrete pillars installed on the foundation, and do not have a sound-absorbing or sound-insulating structure or effect like a soundproof wall.

2) The primary vibration sound transmitted from the ground is transmitted to the pillar without being damped, and is extracted to the outside either directly to the pillar or indirectly through the soundproof wall.

3) It is common practice to simply insert a rubber material between the pillar and the soundproof wall to protect against acoustic energy propagating through the air, but acoustic energy is converted into vibration energy. Since it is relatively small, it is shaken by vibration and leaks from between the contact surfaces.

Therefore, the inventors of the present invention have considered the following countermeasures with the aim of improving the drawbacks of the conventional soundproof wall structure described above.

1. Separate and attenuate the vibration system energy from the ground.

■A cover structure is used for the support pillars as well, which acts as a sound absorber and a sound insulator.

The dish seals the intrusion path of acoustic system energy to prevent leakage of that energy.

Based on these set goals, the inventors have arrived at providing a unique soundproof wall structure as shown in the following description and drawings.

FIG. 1 is a plan sectional view showing the structure of the present invention, and for convenience of explanation, the directions will be described as upward and downward with respect to the drawing.

1 is a support, and this support is H type or ■ type steel,
It is installed with the concave groove portion 1a facing upward and downward.

Elastic bodies 2 and 2' (for example, rubber) each having a concave cross section are fitted into each of the concave grooves by a polymer adhesive layer 2a, and cell-type soundproof boxes 3 and 3' are fitted into the concave portions of the elastic bodies. The end edges of the two are respectively fitted through the polymer viscous adhesive layer 2b.

The cell-type soundproof box body 3 is formed by integrally extruding aluminum material to form the cell-type soundproof box body 3a.

In the figure, 3b is a partition plate, and the box body 3a is divided into several sections by this partition plate to form cell chambers 3c.

However, if cell-type boxes are stacked horizontally, this will not appear in the drawing.

The side surface of the cell-shaped box on the sound source side has a predetermined aperture ratio (for example, 3
0%) and a hole diameter (e.g. 8 mm1) to form a sound absorption hole wall 3d, the opposite side surface is used as a sound insulation wall 3e, and a sound absorption material 3f (e.g. glass wool) is provided in each cell chamber 3c.
The structure is filled with

Both ends of this box are closed with sealing plates 3g.

The cell-type soundproof box body is not limited to the one shown in the figure.
A soundproof box body as shown in the specification of No. 4926 may be used.

This box body consists of a box body that is integrated with a chuck base plate that can be chucked at both end edges of the plate, the sound source side of the box body is formed into a sound-absorbing side plate, and the box body is opposite to the sound-absorbing side plate. A structure is shown in which the other side plate is used as a sound insulating plate, and the cell chamber formed by the partition plate is filled with sound absorbing material.

When using this cell type soundproof box, the elastic bodies 2, 2'
When fitting the end edges of the box into the recesses, it is convenient to separately manufacture and attach sealing plates 3g at both ends of the box to fit the chuck parts.

The cell-type soundproof boxes 3 and 3' are fitted into the upper and lower grooves of the column 1 as described above via the elastic bodies 2 and 2', respectively, to form a soundproof wall, and the column on the opposite side of the sound source is A Sand Inch free space board 4 is placed across the surface, and both end edges of this free space board are attached to the sound insulating wall part 3e of each cell-type soundproof box via a polymer viscous adhesive 4c'. .

Sand inch free space board 4 is a metal plate (e.g. iron, aluminum, lead, etc.), a non-metal plate (e.g. asbestos slate, gypsum board, synthetic resin, etc.), or both metal and non-metal plates are bonded together using a polymeric viscous adhesive (e.g. rubber-based adhesive). , epoxy, vinyl,
phenol-based, compositions mainly based on these, etc.).

A space 5 formed by the covered free space plate 4 and the side surface of the column
(This is called the free space layer.

) is filled with a sound absorbing material 6 (for example, glass wool).

Both ends of the covered free space plate are sealed plates (not shown)
to completely cover the column.

In the embodiment illustrated in FIG.
The outer plate 4a (for example, an aluminum plate) is divided into two parts, and both side edges of the inner plate 4b (for example, an aluminum plate) are bent inward in a dogleg shape, and the bent ends are attached to the elastic body 2.
. outer plate 4a
, 4a' are brought into contact and glued together, and loosely tightened with a tightening rod 4d (bolt/nut).

In this way, the side edges of the sandwich free space board 4 are straddled over and covered so that the side edges of the sandwich free space board 4 are connected to the sound insulating wall parts 3e, 3e of the sound insulating box body.
By attaching the column to the column with adhesive 4c/, the side surface of the column is hermetically covered.

Furthermore, both sides of the Sand Inch free space plate are formed into a dogleg shape in order to change the phase displacement and direction displacement of the vibration wave.

The contact portions of the two divided outer plates 4a and 4a' of the free space plate are sealed with a heat-resistant material 4e.

The illustrated example shows an example in which the surface portion of the abutting portion is attached with heat-resistant tape (for example, lead tape).

With the above-described configuration, the primary vibration system energy from the ground or elevated structure is separated from the wall and the support by the elastic materials 2, 2' and the polymer viscous adhesive layer 2a t 2b. stoned between.

Further, on the side opposite to the sound source, the entire side surface of the column is covered by a sand inch free space plate 4 via a free space layer.

Furthermore, the vibrational energy is converted into other energy and damped by the polymeric viscous adhesive layers 2a and 2b, so that the loss coefficient as a vibration damping property (vibration damping property) becomes 0.5 or more.

In addition, as mentioned above, the acoustic energy propagated to the pillars is covered by the Sandinch free space plate, so it does not escape to the outside, and is subjected to sound absorption, rectification, and filtering effects by the sound absorbing material 6 of the free space layer, making it even more free. An excellent transmission loss value can be obtained due to the multilayer opposing resonance effect between the sand inch free space plate under the phase difference of the vibration system.

Further, the polymer viscous adhesive layer 4c and the 6 layers of sound absorbing material play the role of damping vibrations and absorbing sound.

The function of obtaining an excellent transmission loss value is provided by (4) the contact surface between the sound insulating wall part 3e of the sound insulating box body and one of the fallen edges of the outer plate 4a or inner plate 4b of the sandwich free space board. Polymer viscous adhesive layer 4c/(in the case of FIG. 1, outer plates 4a and 4a' are in contact with each other).

), (B) The side part of the Sand Inch free space plate installed across the side of the column has a rhombic cross-section that can change the phase displacement of the acoustic sound wave and the direction displacement for damping the vibration system. Or to form it into a curved surface.

(C) This is a multilayer opposing damping resonance effect due to the polymer viscous adhesive layer 4c of the Sand Inch free space plate, and the synergistic effect of these terms increases the loss coefficient representing vibration damping property from 0.5 to 0.5.
This is to increase the value to 0.9.

In this way, due to the phase difference and vibration damping of the near-free vibration system energy of the sand inch free space plate attached to the soundproof wall separated from the ground and damped, there is a difference between the soundproof box body and the free space plate. Superior transmission loss values are obtained by causing multi-layer opposing resonance.

Furthermore, leakage of acoustic and vibrational energy will reduce the subsequent soundproofing effect.

The acoustic energy is reduced by a factor of 100.

Therefore, the energy is small, and if the elastic body is simply used, the acoustic energy easily leaks from the gap created by shaking at the contact surface with the soundproof box body due to the vibration energy.

Therefore, the contact surface between the contact surface and the edge of the Sand Inch free space board and the sound insulation wall of the soundproof box is pasted and sealed with a layer of polymeric viscous adhesive to prevent leakage of acoustic energy to the outside. shall be.

Overall, the effects of this invention can be summarized from the above explanation as follows: (1)
Separation and shielding of vibration system energy, (2) Attenuation of vibration system energy, (3) Silence and insulation of acoustic energy, (4)
This has the effect of preventing leakage of acoustic system energy.

Although the general explanation has been given in FIG. 1, the following points will be supplemented.

The action of the polymeric viscous adhesive layer 2a t 2b is as described above, but the action of the polymeric viscous adhesive 4c of the sandwich free-space plate enhances vibration damping characteristics by energy conversion due to strain effect, and reduces acoustic energy. contributes to the absorption of

Polymer viscous adhesive layers 2a, 2b and 4c at each location
The thickness is preferably 0.2 mπ or more, and preferably 0.2 to 2. Omt
yfa degree is practical.

The elastic bodies 2, 2' may be formed integrally with a polymer viscous adhesive using a rubber sheet, net, or cloth material as a core material, and may be fitted into the grooves of the pillars.

The thickness of the elastic body is appropriately set in consideration of the size of the soundproof box, the natural frequency of the support, etc.

As a soundproof box, a cell type box exhibits a good transmission loss value with less drop in transmission loss due to resonance phenomenon compared to a double wall or a heavy wall, and the vibration damping joint mechanism of the present invention It is recommended because it exhibits excellent soundproof wall properties through a synergistic effect with.

However, depending on the design conditions of the acoustic system and vibration system energy, it may also be applied to a single box without a cell chamber or a double wall with both ends sealed with sealing plates.

Fig. 2 shows the strut 1 in Fig. 1 with the concave groove 1a of the channel steel 1 facing upward, and the top of the long side of the L-shaped steel 1' being welded to the bottom lower surface of the channel steel. Groove portions 13' are provided facing rightward, and elastic bodies 2, 2' are fitted into the respective concave grooves using polymeric adhesive 2a, and cell-type soundproof box bodies 3, 3' are fitted into the concave portions of the elastic bodies. The same reference numerals as those in FIG. 1 correspond to those in FIG. 1, except that the edge portions are fitted with a polymeric viscous adhesive 2b.

The sand inch free space plate in this case is curved.

This right angle connection is applied at the corner of the noise barrier.

FIG. 3 shows another embodiment of the present invention, in which the inner plate 4b' (metal plate) of the Sandinch free space plate is cut out at a position on the center line of the pillars and bent outward. Except for the point that it was bent at a right angle to , and fixed with a tightening rod (bolt/nut) with a polymer viscous adhesive layer 4c' interposed between this bent part surface and the sound insulating wall surface part of the cell type sound insulating box body. Reference symbols corresponding to FIG. 1 appear similarly.

In the illustrated case, the inner plate is layered in a curved manner, but it may also be layered in a dogleg shape.

As already mentioned, the direction of energy changes in this stratified portion.

In this embodiment, the columns can be covered with a layered inner panel 4b' of sandwich free-space boards while the remaining sandwich free-space boards can be provided on the soundproof wall surface.

FIG. 4 shows a soundproof wall structure connected by another vibration damping joint, in which elastic bodies 2 and 2' each having a concave cross section are attached to polymeric viscous adhesive layers 2a in opposing grooves 1a of the pillar 1. Fit it with
Furthermore, the edge portions of the cell-type soundproof boxes 3 and 3' are fitted into the recesses of the elastic body using the polymer adhesive layer 2b to form a soundproof wall. Soundproof box body 3'
Connecting polymer viscous adhesive layers 7, 7' are fixed to the respective sound insulating walls 3e, 3e' in contact with the mountain sides of the elastic bodies 2, 2', and a truncated conical cross section is attached to the surface of the viscous adhesive layer. The top side of the damping member 8 is integrally formed by placing the bottom surfaces of two shaped porous members 8a and 8b facing each other and interposing a polymer viscous adhesive 8c between the contact surfaces. A viscous polymeric adhesive layer 7a is fixed to the top side of the other side, and a sandwich free space plate 4 is brought into contact with the surface of each viscous polymeric adhesive layer. The plate 10 is tightened and fixed to the sound insulating wall using a tightening rod 11 (bolt/nut).

Sand inch free space plate (outer plate 4a metal plate, inner plate 4
The outer edge of the outer plate 4a of the plasterboard (b) is extended, further bent inward at right angles, and the bent end is attached to the polymer viscous adhesive layer 7.
press against.

The sides of the column are thus covered with sand inch free space plates.

A space 5 formed between the side part of the column and its free space plate is sealed, and a sound absorbing material 6 is filled in this space.

In the above, examples of the porous member include a material obtained by binding inorganic or organic fibers with a binder, cork material, foamed lightweight concrete, and the like.

Further, the thickness of the polymer viscous adhesive layer is desirably 0.2 mm or more, and a speed of 0.2 to 2.0 m is practical.

Further, this viscous adhesive layer functions similarly to the polymeric viscous adhesive of the sandwich free-space plate.

Furthermore, the porous member may be constructed in multiple layers of two or more.

In addition to the functions and effects of the soundproof wall structure explained in FIG. Since it can absorb and attenuate sound, it can exhibit high sound absorption coefficient and transmission loss value.

It is preferable that the shape of the vibration damping member is convertible between phase displacement and directional displacement of acoustic system and vibration system energy, and typical examples thereof include a round cross section and a round shape.

In FIG. 5, the side edge of an inner plate 4b (metal plate) is bent inward at right angles in place of the outer plate 4a of the sandwich free space plate shown in FIG. The reference numerals corresponding to those in FIG. 4 appear in the same manner as in FIG. 4, except that the parts are brought into contact with the polymer viscous adhesive layers 7, 7' provided on the sound insulating wall surface of the sound insulating box.

In this case, the outer plate (metal plate) can be a free space plate of the soundproof wall.

FIG. 6 is a diagram illustrating the experimental results showing the effect of fitting a cell-type soundproof box to a support column and completely covering the support portion on the side opposite to the sound source with a sandwich free space board,
The vertical axis is the band sound pressure level (bB), and the horizontal axis is the band frequency (Hz).
), and the I curve represented by the solid line in the figure shows the case where the soundproof wall support part is left open, the ■ curve (dashed line) shows the case where the support part is covered with a 2m square metal plate (2 mit), and the ■ curve (
The dotted line) indicates that the support portion is covered by the means shown in FIG.

The measured values are all sound pressure levels measured at a position 30 CrrL from the wall surface, and it is clear that the effect of the soundproof wall structure according to the present invention is obvious.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted plan sectional view showing the soundproof wall structure of the present invention, FIGS. 2 and 3 are plan sectional views showing another embodiment, and FIGS. 4 and 5 are other configuration examples. FIG. 6 is a partially omitted plan sectional view showing an example of an implementation result. The numbers in the figure represent the following: 1, 1'... Support, 1a, 1a'...
Support column concave groove, 2, 2'...Elastic body, 2a,
2b... Polymer viscous adhesive layer, 3.3'...
...Cell type soundproof box body, 3a...Cell type box body,
3b...Partition plate, 3c...Cell chamber, 3
d...Sound absorption hole wall part, 3e, 3e'...
Sound insulation wall part, 3f...Sound absorbing material, 3g...
Sealing plate, 4...Sand inch free space plate, 4a
, 4a'...Outside plate, 4b, 4b'...
・Inner plate, 4c, 4c'...Polymer viscous adhesive layer, 4d...Tightening rod, 4e...Heat-resistant material, 5...Space Part, 6...Sound absorbing material, 7.
7',? a...Connected polymer viscous adhesive layer, 8.
... Damping member, 8a, 8b... Porous member, 8c... Polymer viscous adhesive layer, 9...
...Elastic body, 10...Seat plate, 11...
・Tightening rod.

Claims (1)

[Scope of Claims] 1. Elastic bodies each having a concave cross section are fitted into the grooves of the opposing struts using a polymer adhesive, and a cell-type soundproof box is inserted into the recesses of the elastic bodies via the polymer adhesive. The end edges of the body are fitted, and a sandwich free space board made by adhering a metal plate or a non-metal plate with a polymeric viscous adhesive is placed over the side of the support column on the opposite side from the sound source. , both ends of the free space board are fixed to the face of each cell-type soundproof box via a polymeric viscous adhesive, and the space between the free space board and the side of the column is filled with sound absorbing material. Features a soundproof wall structure in which pillars are connected with damping joints. 2. As a means to cover the side surface of the support column to which the cell-type soundproof box is fitted, the outer plate of the free space plate is divided into two parts, and one edge of each divided outer plate is A vibration-damping support according to claim 1, in which the parts are fixed to the corresponding cell-type soundproof box body face part via a polymeric adhesive, and the opposing part of the other side edge part is fixed with a heat-resistant material. Soundproof wall structure with joints connected. 3. As a means of covering the side surface of the pillar to which the cellular soundproof box body is fitted, the inner plate of the free space plate is cut out, and the side edges of each cut inner plate are aligned. A soundproof wall structure in which the pillar according to claim 1, which is fixed to the face of a cell-type soundproof box via a polymeric adhesive, is connected by a damping joint. 4. As a means for covering the side surface of the column to which the cell-type soundproof box is fitted, a porous member is placed in the space formed between the free-space board and each cell-type soundproof box. A vibration damping member is integrally formed with a polymer viscous adhesive layer interposed between the contact surfaces of the free space plate and the vibration damping member. is integrally fixed to each cell-type soundproof box body with a tightening rod, and the outer side edge of the free space plate is bent inward and the bent edge is raised. A soundproof wall structure in which the pillars according to claim 1 are connected by vibration damping joints, and are in contact with the face of the husband's cell-type soundproof box through a molecular viscous adhesive. 5 Sand Inch The free space board and the damping member are integrally fixed to each cell-type soundproof box using a tightening rod, and both ends of the inner board of the free space board are bent inward. A soundproof wall structure in which the struts according to claim 4 are connected by damping joints, the end edges of which are in contact with the face portions of the respective cell-type soundproof boxes via a viscous polymeric adhesive.