KR20160074027A - Joint Device of Soundproofing Wall with Sound Absorbing Performance - Google Patents

Abstract

The present invention relates to a soundproof wall joint device having a sound absorption function, including a fixation unit to fixate a pole and a soundproof plate. The soundproof wall joint device having a sound absorption function comprises: a holder having a cavity inside thereof to reduce noise from the outside by letting the noise flow into the cavity and fixate both sides of the soundproof plate to the pole by being inserted into a coupling groove of the pole; a plurality of sound absorption plates arranged in the cavity of the holder and having a plurality of sound absorption holes to reduce noise by making noise flowing in the cavity pass through in stages and be discharged to the outside of the cavity; and a slots arranged in the longitudinal direction of both inner sides of the holder to make both sides of the sound absorption plates be slid and coupled with the holder. As such, a noise colliding with the sound absorption plates, naturally scattered toward both sides of the sound absorption plates, and guided to the fixation unit is guided into the cavity of the holder and absorbed by passing through the sound absorption plates. Therefore, the fixation unit of the present invention can not only improve the performance of the soundproof wall but also perform a fixation function of fixating the soundproof plates to the pole.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a soundproofing wall fixing device,

More particularly, the present invention relates to a soundproof wall fixing device having a sound absorbing performance, and more particularly to a soundproof wall fixing device having a sound absorbing performance, And a soundproof wall fixing device having a sound absorbing performance capable of easily installing a plurality of sound absorbing panels on a support.

Noise and Vibration Pollution is one of the pollutants frequently encountered in everyday life, and it is installing noise barrier to increase the psychological, mental and physical fatigue and stress to create a pleasant and quiet environment.

Soundproof walls are installed to block or reduce noise from outside. They are installed around highways, residential areas, schools and public facilities.

These soundproof walls are usually composed of a column of H beams arranged at equal intervals on the ground and a sound insulating plate having both side ends located in the grooves on both sides of the column and stacked.

Such a conventional soundproof wall is roughly divided into a soundproof soundproof wall for reflecting noise through a soundproof plate and a soundproof soundproof wall for absorbing and extinguishing noise through the soundproof material of the soundproof plate.

Sound insulation type of soundproofing wall is concrete soundproofing wall. Concrete soundproofing walls are one of the typical soundproofing walls that are widely used until now, and they have a structure to prevent sound from propagating by reflecting noise. These concrete sound barrier walls are excellent in durability and weatherability but have a low sound absorption property.

Sound absorbing panels having sound absorbing performance are used as sound absorbing sound absorbing walls. Such a soundproofing wall has excellent sound absorption characteristics because the soundproofing sheet has more sound absorption performance, but it has a disadvantage that maintenance is difficult. Polyester, polyurethane, wood, glass wool, rock wool, etc. are used as the soundproofing boards.

As the thickness of the sound-absorbing type sound insulation wall increases, the sound absorption performance is improved, but the material cost is greatly increased and the construction is difficult.

Korea Patent No. 10-0273712

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems described above, and an object of the present invention is to provide a soundproof wall fixing apparatus having a sound absorbing performance for improving the sound absorbing performance without increasing the thickness of the sound insulating plate.

It is another object of the present invention to provide a soundproof wall fixing device having a sound absorbing performance capable of inducing noise naturally irregularly reflected to both sides of a soundproof plate after hitting the soundproof plate, .

It is still another object of the present invention to provide a soundproof wall fixing device having a sound absorbing performance that is smoothly absorbed and minimizes external contamination and inflow of rainwater.

It is still another object of the present invention to provide a soundproof wall fixing apparatus having a sound absorbing performance capable of easily connecting a plurality of sound absorbing panels and varying the entire length of the sound absorbing plate in accordance with the length of the support.

Another object of the present invention is to provide a soundproof wall fixing device having a sound absorbing performance such that the noise introduced to the sound absorbing plate is irregularly reflected toward the center of the sound absorbing plate without being diffused to the outside of the sound absorbing plate.

In order to achieve the above object, the soundproof wall fixing apparatus of the present invention having sound absorbing performance is arranged at regular intervals along the direction in which soundproof walls are to be installed, the lower end is fixed to the ground, A holding; A soundproof plate disposed on both sides of the coupling groove of the column to block a space between two adjacent columns; And a fixing part which is elongated along the longitudinal direction of the support and is fitted in the coupling groove to fix both sides of the sound insulation plate to the support; The fixing part includes a holder having a cavity formed therein and reduced in external noise by being inserted into the coupling groove of the support to fix both sides of the sound insulation plate to the support, A plurality of sound absorbing plates formed on the inner side of the holder so as to reduce noise while being discharged out of the cavity again after being passed step by step and slots formed so as to slide on both sides of the sound absorbing plates .

In another aspect of the soundproof wall fixing device having the sound absorbing performance of the present invention, a plurality of sound absorbing holes are formed in the sound absorbing plate so that external noises may enter the cavity of the holder. The sound absorbing plates may have a porosity of 1 to 10% .

Another feature of the soundproof wall fixing device having the sound absorbing performance of the present invention is that the sound absorbing holes are narrower than the entrance and the sectional area ratio of the beginning portion of the entrance to the end portion of the exit is 1: 1.2 to 1: 5 .

Another feature of the soundproof wall fixing device having the sound absorbing performance of the present invention is that a fastening piece with a fastening hole is extended to the end of the sound absorbing plate and fastened by fastening screws to the fastening holes after the adjacent upper and lower fastening pieces are overlapped, A separate connecting piece is returned to the adjacent upper and lower fastening pieces, and then the fastening pieces are fastened to the connecting piece and the fastening pieces.

Another feature of the soundproof wall fixing apparatus having the sound absorbing performance of the present invention is that the sound absorbing plate is formed such that the cross sectional shape is bent in the shape of "" to increase the surface area.

As described above, according to the present invention, there is provided a fixing device for fixing a support and a soundproof plate, comprising: a holder having a cavity formed therein, an external noise reduced therein and being inserted into a coupling groove of the support, Sound-absorbing plates arranged in the cavity of the holder and having a plurality of sound-absorbing holes formed therein so as to reduce noises while gradually passing through the noise of the cavity of the holder after being passed through the cavity, And the slots are formed such that both sides of the sound-absorbing plates are slidably engaged. Therefore, after the noise hits the soundproof plate, the noise spreads to both sides of the soundproof plate and is guided to the fixed portion, and the noise introduced into the fixed portion passes through the suction plates and is absorbed into the cavity of the holder. Therefore, the fixing portion of the present invention not only fixes the soundproof plate to the support, but also performs a sound absorption function, so that the performance of the soundproof wall can be improved.

In the sound-absorbing panel of the present invention, a plurality of sound-absorbing holes are formed in order to allow external noise to flow into the cavity of the holder, and the sound-absorbing plates are formed to have a porosity of 1 to 10%. If the porosity of the sound-absorbing plate is less than 1%, external noise can not flow smoothly into the cavity. If the sound-absorbing plate has a porosity exceeding 10%, the contamination inside the fixing portion increases and rainwater enters the cavity . Therefore, the sound-absorbing plate of the present invention is formed with sound-absorbing holes so as to have an optimum porosity, so that sound absorption is smoothly performed and inflow of external pollution or rainwater is minimized.

The sound absorbing holes of the present invention are narrower in the inlet than in the outlet, and the cross-sectional area ratio of the beginning of the inlet to the end of the outlet is 1: 1.2 to 1: 5. When the area ratio between the inlet and the outlet is less than 1: 1.2, the difference in passage between the inlet and the outlet is not large, so that the effect of improving the inflow speed of the noise is insignificant. When the area ratio of inlet to outlet is more than 1: 5, the flow rate of noise is not greatly improved, but processing is difficult. Therefore, the present invention maintains the area ratio between the inlet and the outlet of the sound absorbing holes from 1: 1.2 to 1: 5, so that the noise reducing effect and the noise influencing effect in a wide band can be improved.

In the sound absorbing panel end portion of the present invention, a fastener having a fastening hole is extended. Therefore, the adjacent upper and lower fastening pieces may be overlapped and fastened by fastening the screws to the fastening holes, or may be fixed by fastening screws to the connecting pieces and fastening pieces after a separate connecting piece is attached to the adjacent upper and lower fastening pieces. Therefore, a plurality of sound absorbing panels can be simply connected and the connected state is extremely rigid, so that the entire length of the sound absorbing plate can be easily changed in accordance with the length of the support.

The sound absorbing plate of the present invention is bent in the shape of a cross section in the shape of "". Therefore, the surface area of the sound-absorbing plate is increased and the sound-absorbing holes are further formed by the increase of the surface area. Therefore, the sound that naturally spreads to both sides of the soundproof plate after hitting the soundproof plate passes through the surface area and the sound absorbing holes of the increased sound absorbing plate as much as possible, thereby improving the sound absorption performance.

Further, since the cross-sectional shape of the sound-absorbing plate is bent in the shape of "", the noise struck against the sound-absorbing plate is guided to the center of the sound-absorbing plate without spreading to the outside of the sound- Therefore, the noise is maximally guided toward the sound-absorbing holes of the sound-absorbing plate, so that the sound-absorbing performance is improved.

1 is a schematic partial perspective view showing a state in which a soundproof wall is installed at an entrance or an exit of a tunnel.
2 is a schematic perspective view showing a soundproof wall fixing apparatus having a sound absorbing performance according to the present invention.
Fig. 3 is a plan view of Fig.
Fig. 4 is a side sectional view of Fig. 2
5 is a schematic plan view showing another embodiment of the present invention.

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic partial perspective view showing a state where a soundproof wall is installed at an entrance or an exit of a tunnel, FIG. 2 is a schematic perspective view showing a soundproof wall fixing device having a sound absorbing performance of the present invention, FIG. 3 is a plan view of FIG. Is a side sectional view of Fig.

The soundproof wall fixing apparatus having the sound absorbing performance according to the present invention includes a support (20), a soundproofing plate (30), and a fixing portion (40).

The pillars 20 are arranged at equal intervals along the direction in which the soundproof wall 10 is to be installed, the lower ends thereof are fixed to the ground, and the coupling grooves 21 are formed on both sides along the vertical direction. These pillars 20 are made of H beams.

The sound insulating plate 30 is positioned in the coupling groove 21 of the support column 20 on both sides and blocks the space between the adjacent two support posts 20.

The fixing portion 40 is elongated along the longitudinal direction of the column 20 and is fitted in the coupling groove 21 to fix both sides of the sound insulation plate 30 to the support.

The fixing portion 40 includes a holder 41, a sound absorbing plate 44, and slots 42.

The holder 41 is formed with a cavity 43 therein so that external noise is absorbed and reduced and is fitted into the coupling groove 21 of the column 20 so that both sides of the sound insulation board 30 are fixed to the pillars 20 .

The sound absorbing plate 44 is arranged in the cavity 43 of the holder 41 and after the noise introduced into the cavity 43 of the holder 41 is passed stepwise and then discharged again out of the cavity 43, A plurality of sound absorbing holes 45 are formed.

The slots 42 are elongated in the longitudinal direction on both sides of the inside of the holder 41 so that both sides of the sound-absorbing plates 44 are slidably engaged.

On the other hand, the sound-absorbing plate 44 is formed with a plurality of sound-absorbing holes 45 so that external noises are introduced into the cavity 43 of the holder 41. These sound-absorbing holes 45 are formed such that the sound-absorbing plate 44 has a porosity of 1 to 10%.

If the porosity of the sound-absorbing plate 44 is less than 1%, external noise can not flow smoothly into the cavity 43. If the porosity of the sound-absorbing plate 44 exceeds 10%, contamination of the interior of the fixing portion 40 is increased, and rainwater or the like may be introduced into the cavity 43. Therefore, it is preferable that the sound-absorbing holes 45 are formed on the sound-absorbing plate 44 to have a porosity of 1 to 10%.

Further, the sound-absorbing holes 45 of the sound-absorbing plate 44 are narrower than the outlets 45b.

Therefore, when passing through the inlet 45a having a small noise due to the Venturi effect, the velocity is increased and flows smoothly. Then, while being transferred to the outlet 45b having a large diameter, the flow velocity and the pressure are lowered, thereby canceling the noise.

Sectional area ratio between the beginning of the inlet 45a of the sound-absorbing hole 45 and the end of the outlet 45b is 1: 1.2 to 1: 5.

When the cross-sectional area ratio between the inlet 45a of the sound-absorbing hole 45 and the outlet 45b of the sound-absorbing hole 45 is less than 1: 1.2, the passage difference of the inlet 45a and the outlet 45b is not large, The effect is minimal.

When the area ratio of the inlet 45a to the outlet 45b exceeds 1: 5, the flow rate of the noise is not greatly improved, but the processing is more difficult. Therefore, it is preferable that the area ratio of the inlet 45a to the outlet 45b of the sound-absorbing holes 45 is maintained at 1: 1.2 to 1: 5.

At the end of the sound-absorbing plate 44, a fastening piece 46 having a fastening hole 47 is formed.

Therefore, the screws 48 can be fastened to the fastening holes 47 after the adjacent upper and lower fastening pieces 46 are overlapped.

It is also possible to fasten the screws 48 to the connecting pieces 49 and the fastening pieces 46 after the separate connecting pieces 49 are brought into contact with the adjacent upper and lower fastening pieces 46.

Therefore, the plurality of sound absorbing plates 44 can be simply connected by the connecting piece 49 and the screw 48, and the connected state is extremely rigid, so that the entire length of the sound absorbing plate can be easily changed in accordance with the length of the strut .

The soundproof wall fixing apparatus having the sound absorbing performance of the present invention is constructed as follows.

First, pillars (20) are provided at equally spaced intervals along the longitudinal direction of the roadway on which soundproof walls (10) are to be installed. When the pillars 20 are installed at equal intervals, both ends of the soundproof plate 30 are positioned in the coupling grooves 21 of the adjacent two pillars 20 so as to fill the space between the adjacent two pillars 20. The thickness of the sound insulation plate 30 is thinner than the width of the coupling groove 21 of the support 20. Therefore, the fixing plate 40 is inserted into the coupling groove 21 and the sound insulation plate 30 is brought into close contact with the coupling groove 21 of the support 20.

The holder 41 of the fixing portion 40 is formed in a C-shaped cross-section. Thus, the opening portion is pushed into the coupling groove 21 so as to face outward

An adhesive may be applied to the outer surface of the holder 41 before the holder 41 is pushed into the engaging groove 21, and then the holder 41 may be pushed in. In this way, the fastening force between the holder 41 and the support pillars 20 can be increased.

When the holder 41 is engaged with the engaging groove 21 of the fixing portion 40, the sound insulating plates 30 are inserted into the slots 42 of the holder 41. The soundproofing plates 30 are inserted into the slots 42 of the holder 41 in accordance with the length of the struts 20. The plurality of sound insulation plates 30 inserted into the slots 42 fasten the upper and lower fastening members 46 with screws 48.

The connecting pieces 49 may be fixed to the fastening holes 47 after the upper and lower fastening pieces 46 are overlapped with each other and the connecting pieces 49 may be connected to the upper and lower fastening pieces 46, And the screws 48 may be fastened to the fastening pieces 46 to fix them.

The sound insulating plates 30 may be engaged with the slots 42 of the holder 41 after the holder 41 is coupled to the coupling grooves 21 of the support 20, The sound insulating plate 30 may be inserted into the groove 20 of the support 20 and the holder 41 to which the soundproof plate 30 is coupled may be inserted into the coupling groove 21 of the support 20.

The soundproof wall fixing apparatus having the sound absorbing performance of the present invention has the following advantages.

First, the fixing part 40 for fixing the support 20 and the soundproofing plate 30 is formed with a cavity 43 therein. The noise is introduced into the fixing part 40, A sound absorbing plate 30 which is arranged in the cavity 43 of the holder 41 and has noise introduced into the cavity 43 of the holder 41, A sound absorbing plate 44 having a plurality of sound absorbing holes 45 formed therein so as to reduce noise while being discharged out of the cavity 43 after being passed step by step, And slots (42) for slidingly connecting the both sides of the guide grooves (44).

Therefore, after the noise hits the sound insulation plate 30, the noise spreads to both sides of the sound insulation plate 30 and is guided to the fixing unit 40. The noise introduced into the fixing unit 40 passes through the sound absorption plates 44, So that the sound is absorbed.

Therefore, the fixing part 40 of the present invention not only fixes the sound insulation board 30 to the support 20 but also performs a sound absorption function, thereby improving the performance of the sound insulation wall.

A plurality of sound absorbing holes 45 are formed in the sound absorbing plate 44 of the present invention such that external noises are introduced into the cavity 43 of the holder 41. These sound absorbing holes 45 are formed in the sound absorbing plate 44, Is formed to have a porosity of 1 to 10%.

If the porosity of the sound-absorbing plate 44 is less than 1%, external noise can not flow smoothly into the cavity 43. If the porosity of the sound-absorbing plate 44 exceeds 10% There is a problem that rainwater or the like is introduced into the cavity 43.

Therefore, the sound-absorbing plate 44 of the present invention is formed with the sound-absorbing holes 45 so as to have an optimum porosity, so that sound absorption is smoothly performed, and inflow of external pollution or rainwater is minimized.

Third, the sound-absorbing holes 45 of the present invention are narrower than the outlet 45b, and the cross-sectional area ratio between the beginning of the inlet 45a and the end of the outlet 45b is 1: 1: 5. When the area ratio between the inlet 45a and the outlet 45b is less than 1: 1.2, the difference in passage between the inlet 45a and the outlet 45b is not large, and thus the effect of improving the inflow speed of the noise is insignificant. When the area ratio of the inlet 45a to the outlet 45b exceeds 1: 5, the flow rate of the noise is not greatly improved, but the processing is difficult.

Accordingly, the present invention maintains the area ratio between the inlet 45a and the outlet 45b of the sound-absorbing holes 45 from 1: 1.2 to 1: 5, so that it is possible to improve the noise reduction effect and the noise influencing effect in a wide band.

Fourth, at the end of the sound absorbing plate 44 of the present invention, a fastening piece 46 formed with a fastening hole 47 is extended.

Therefore, after the adjacent upper and lower fastening pieces 46 are overlapped and then the screws 48 are fastened and fixed to the fastening holes 47 or a separate connecting piece 49 is returned to the adjacent upper and lower fastening pieces 46, And the fastening pieces 46 can be fastened by fastening the screws 48. [

Therefore, the plurality of sound absorbing plates (44) can be simply connected and the connected state is very rigid, so that the entire length of the sound absorbing plate (44) can be easily changed in accordance with the length of the support (20).

5 is a schematic plan view showing another embodiment of the present invention. In the present invention, the cross section of the sound absorbing plate 44 'is bent in the shape of "". Therefore, the surface area of the sound-absorbing plate 44 'is increased, and the sound-absorbing holes 45' are further formed by the increase of the surface area.

Therefore, after the impact on the soundproofing plate 30, the sound absorbing plate 44 ', which naturally spreads to both sides of the soundproofing plate 30, is maximally brought into contact with the surface area of the increased sound absorbing plate 44', thereby passing a greater number of sound absorbing holes 45 ' So that the sound absorption performance is improved correspondingly.

Since the transverse sectional shape of the sound absorbing plate 44 'is bent in the shape of "", the noise hitting the sound absorbing plate 44' is guided toward the center of the sound absorbing plate 44 'without spreading to the outside of the sound absorbing plate 44' ').

Therefore, the noise is maximally guided toward the sound-absorbing holes 45 'of the sound-absorbing plate 44', so that the sound-absorbing performance is improved.

On the other hand, the holder 41 of the fixing portion 40 is made of nodular cast iron. The nodular cast iron is heated to a temperature of 1600 to 1650 ° C to be molten, then subjected to desulfurization treatment, and subjected to spheroidizing treatment at a temperature of 1500 to 1,550 ° C by adding a spheroidizing agent containing magnesium in an amount of about 0.3 to 0.7% by weight, followed by heat treatment.

Since nodular cast iron is a cast iron in which graphite is spherically crystallized during the solidification process by adding magnesium or the like to the molten metal of the common gray cast iron, the shape of the graphite is spherical compared to gray cast iron. Since the nodular cast iron has a small notch effect, the stress concentration phenomenon is reduced and the strength and toughness are greatly improved.

The nodular cast iron of the present invention is heated to 1600 to 1650 占 폚 to be molten and then subjected to a desulfurization treatment. A spheroidizing agent containing magnesium in an amount of about 0.3 to 0.7% by weight is put into a holder 41, Followed by heat treatment.

Here, when the nodular cast iron is heated to less than 1600 ° C, the entire structure is not sufficiently melted. If the cast iron is heated above 1650 ° C, unnecessary energy is wasted. Therefore, it is preferable to heat the nodular cast iron to 1600 to 1650 ° C.

When the amount of magnesium is less than 0.3% by weight, the effect of injecting the spheroidizing agent is negligible. When the amount of magnesium is less than 0.3% by weight, the effect of injecting spheroidizing agent is insignificant. When the amount of magnesium is less than 0.3% There is a problem in that an expensive material cost is increased. Therefore, the mixing ratio of magnesium in the spheroidizing agent is preferably about 0.3 to 0.7% by weight.

When the spheroidizing treatment agent is injected into the molten nodular cast iron, it is subjected to spheroidizing treatment at 1500-1550 ° C. If the spheroidizing treatment temperature is lower than 1500 ° C., the spheroidizing treatment is not properly performed. If the spheroidizing treatment temperature is higher than 1550 ° C., the spheroidizing treatment effect is not greatly improved, but unnecessary energy is wasted. Therefore, the spheroidization treatment temperature is preferably 1500 to 1550 ° C.

Since the holder 41 of the present invention is made of the nodular cast iron, the stress concentration phenomenon is reduced because the notch effect is small, and the strength and toughness are greatly improved.

Also, a polypropylene resin composition having excellent impact resistance against external impact or external environment may be coated around the sound absorbing plate 44. The polypropylene resin composition comprises a polypropylene random block copolymer composed of 75 to 95% by weight of an ethylene-propylene-alphaolefin random copolymer and 5 to 25% by weight of an ethylene-propylene block copolymer having an ethylene content of 20 to 50% by weight .

The polypropylene random block copolymer is preferably 75 to 95% by weight of the ethylene-propylene-alphaolefin random copolymer and 5 to 25% by weight of the ethylene-propylene block copolymer. The ethylene- When the content of the ethylene-propylene block copolymer is less than 5% by weight, the impact resistance is deteriorated. When the content of the ethylene-propylene block copolymer is more than 25% by weight, the rigidity is deteriorated do.

Wherein the ethylene-propylene-alpha olefin random copolymer comprises 0.5 to 7% by weight of ethylene and 1 to 15% by weight of an alpha-olefin having 4 to 5 carbon atoms and improves mechanical stiffness and heat resistance of the polypropylene resin composition, As shown in Fig. The ethylene content is preferably from 0.5 to 5% by weight, more preferably from 1 to 3% by weight. When the content of ethylene is less than 0.5% by weight, the whitening resistance is deteriorated. When the content is more than 7% by weight, . Further, the alpha olefin means any alpha olefin except ethylene and propylene, and is preferably butene. When the number of carbon atoms is less than 4 or more than 5, the reactivity of the alpha-olefin with the comonomer is low during the production of the random copolymer, making it difficult to produce the copolymer. Further, it may contain 1 to 15% by weight, preferably 1 to 10% by weight, and more preferably 3 to 9% by weight of the above-mentioned alpha olefin. If the amount of the alpha-olefin is less than 1% by weight, the crystallinity becomes higher than necessary and the transparency is lowered. When the amount of the alpha-olefin is more than 15% by weight, the crystallinity and rigidity are lowered and the heat resistance is significantly lowered.

In addition, the ethylene-propylene block copolymer contains 20 to 50% by weight of ethylene and imparts impact resistance to the polypropylene resin composition and enables finely dispersing, thereby imparting both whitening resistance and transparency. The ethylene content may preferably be 20 to 40% by weight, and if it is less than 20% by weight, the impact resistance is deteriorated. If it exceeds 50% by weight, the impact resistance and whitening resistance may be deteriorated.

Since the polypropylene resin composition having excellent impact resistance against external impact or external environment is coated on the periphery of the sound absorbing plate 44 according to the present invention, the soundproof plate 44 is not easily damaged by external impacts, and thus the service life of the product is extended.

10: Soundproof wall 20:
30: Soundproofing board 40:
41: holder 42: slot
43: cavity 44, 44 ': sound absorption plate
45, 45 ': Sound absorbing hole 45a:
45b: outlet 46:
47: fastening hole 48: screw
49: Connection

Claims (5)

A support (20) arranged at equal intervals along the direction in which the soundproof wall (10) is installed, a lower end fixed to the ground, and coupling grooves (21) formed along the vertical direction on both sides;
A sound insulation plate 30 located on the coupling groove 21 of the column 20 on both sides and blocking a space between two adjacent columns 20;
And a fixing part 40 formed to be long along the longitudinal direction of the support column 20 and fitted in the coupling groove 21 to fix both sides of the sound insulation board 30 to the support posts;
The fixing portion 40,
A holder 41 which is formed with a cavity 43 therein and which receives external noise and is inserted into the coupling groove 21 of the support 20 to fix both sides of the sound insulation plate 30 to the support 20; A plurality of sound absorbing holes 43 are arranged in the cavity 43 of the holder 41 and the noise introduced into the cavity 43 of the holder 41 is gradually passed through the cavity 43 and then discharged again out of the cavity 43, And the sound absorbing plates 44 and 44 'formed on both sides of the inside of the holder 41 so as to be slid along the longitudinal direction so that both sides of the sound absorbing plates 44 and 44' Slots (42). ≪ Desc / Clms Page number 13 >
The sound absorbing device according to claim 1, wherein the sound absorbing plates (44) and (44 '
A plurality of sound absorbing holes 45 and 45 'are formed so that external noises are introduced into the cavity 43 of the holder 41,
Wherein the sound-absorbing holes (45) and (45 ') are formed such that the sound-absorbing plates (44) and (44') have a porosity of 1 to 10%.
The sound absorbing device according to claim 1, wherein the sound absorbing holes (45)
Characterized in that the inlet (45a) is narrower than the outlet (45b) and the cross sectional area ratio of the beginning of the inlet (45a) to the end of the outlet (45b) is 1: 1.2 to 1: Sound barrier fixture.
The sound absorbing plate according to claim 1,
A fastening piece 46 formed with a fastening hole 47 is extended,
The upper and lower fastening pieces 46 are overlapped with each other and then the screws 48 are fastened and fixed to the fastening holes 47 or the connecting pieces 49 and And fastening the screws (48) to the fastening pieces (46).
The method according to claim 1,
Wherein the sound-absorbing plate (44 ') is formed such that the cross-sectional shape thereof is bent in the shape of "" to increase the surface area thereof.

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