KR100769409B1 - Assembly for reducing noise - Google Patents

Abstract

An assembly for reducing noise is provided to prevent a diffraction phenomenon generated at the upper end of a soundproofing wall. An assembly for reducing noise comprises a pair of fastener members(10) removably fastened to opposite sides of the upper end of an installation beam, a base panel(20) integrally fixed on one side of each installation beam and having an upper protrusion and a lateral protrusion, a porous steel plate(30) removably fixed along an edge of the upper protrusion of the base panel, a sound absorbent member(32) removably fixed inside the porous steel plate by a stopper(16) integrally formed with the base panel, and guide walls formed in parallel inside the lateral protrusion of the base panel, defining an inner resonant space using the fastener members and the sound absorbent member, and guiding noise, going up from the downside, to the resonant space.

Description

Assembly for Reducing Noise

1 is a perspective view showing the configuration of a noise attenuator according to the present invention

Figure 2 is a front view showing the configuration of the noise attenuator according to the present invention

Figure 3 is an enlarged view showing the configuration of the connection portion of the noise attenuator according to the present invention

Figure 4 is a front view showing the configuration of the expanded state of the noise attenuator according to the present invention

Figure 5 is a front view showing the configuration of another embodiment of the noise attenuator according to the present invention

Figure 6 is a perspective view showing the configuration of an example of the use of the noise attenuator according to the present invention

Figure 7 is a perspective view showing a state assembled to the installation beam of the noise attenuator according to the present invention

 <Explanation of symbols for main parts of the drawings>

1: mounting beam 10: fastening member

14: tightening groove 16, 32a: stopper

20: base panel 30: porous steel sheet

32: sound absorbing material 34: fixing piece

40: guide wall 42: reflective wall

42a: opening hole 44: scattering wall

46: guide wall 46a: return space

50: finishing member 52: fastening protrusions

54: extension

The present invention relates to a noise attenuator, and more particularly, in order to block noise generated in a vehicle, more specifically, in a soundproof wall installed at a side wall of a residential street or a central separation wall of a road to attenuate vehicle noise. The present invention relates to a noise attenuator for reducing the height of a sound barrier by preventing diffraction from occurring.

In general, soundproof walls are installed in residential areas near roads, including schools adjacent to roads, to maintain pleasant living conditions by blocking the transmission of horn noises or noises generated during the driving process to residential areas. . In addition, these sound barriers are required to be installed in the central partition of the road.

Such types of sound barriers are known as reflective sound barriers that reflect noise generated on the road back in the direction of the road and block noise from propagating to the outside of the road, and sound absorbing sound barriers that absorb and extinguish the noise generated on the road. Sound insulation walls are low cost, but the noise blocking effect is low, so the sound-absorbing sound barrier with excellent noise effect is widely used recently.

The sound-absorbing soundproof wall has a sound absorbing material embedded therein to absorb the noise generated on the road through the sound absorbing material, while reducing the noise through the resonance inside the cavity.

However, the sound is diffractive, and although the soundproof wall is installed, it enters the residential area beyond the top of the soundproof wall, so the height of the soundproof wall is inevitably higher for a perfect sound insulation and soundproofing effect.

Such a conventional soundproof wall has a problem that the installation cost is complicated and the work process is complicated due to the height that is higher for the soundproofing effect, and the urban aesthetics are injured by this, as well as infringement of sunshine right in the residential area.

Therefore, in recent years, the advanced countries have set the height limit to limit the noise barrier so as not to exceed a certain height, so attempts have been made to maximize the noise shielding within the limited height.

Accordingly, Korean Utility Model Registration No. 20-0434048 discloses a noise attenuator that absorbs and reduces diffraction noise passing through a soundproof wall, and decorates the outside of the noise attenuator with a round semi-circular stucco.

This is a problem caused by the majority of noise reduction devices used in conventional soundproof walls using plastic materials or steel materials, that is, it is difficult to express natural texture and natural materials of steel materials and weak to ultraviolet rays of plastic products. It is pointed out that there is a big problem that the heterogeneous feeling of steel is used when it is used as a wooden soundproof wall in appearance, when plastic is stretched in the summer, freezing in summer, freezing due to cold weather in winter, and apparently used as a wooden soundproof wall. It is improving rust, color discoloration, harmony with surrounding environment, and wood type soundproofing wall and harmony problem.

However, the noise attenuator having such a structure still reduces the diffraction phenomenon of the upper part of the soundproof wall by simply using wood, so the noise attenuation efficiency is still insufficient.

In addition, Utility Model Registration No. 20-0420185 is fixed to the top of the soundproof panel installed on the road structure, absorbs and reduces the diffraction noise passing through the soundproof panel, and the effect of the light generated by the luminous material at night A noise attenuator is disclosed.

This suggests a way to improve the problem that the higher sound barriers darken the sky at night and block the lights of the street lights.

However, the soundproof wall of such a structure has the effect of improving the suggestion of the position of the soundproof panel due to the luminous and aesthetic design using light, but in terms of noise attenuation performance, the diffraction noise passing through the soundproof panel to the front and rear sound absorbing rooms is primarily primary. It has a configuration including a secondary sound absorbing material effect that absorbs and attenuates through the internal space, and attenuates the transmitted noise to the rear sound absorbing material, which has a problem of low diffraction reduction efficiency.

In addition, Utility Model Registration No. 20-0380490 describes, “In stacking sound insulation panels vertically on the roadside where vehicle traffic is frequent, constructing soundproof walls, and blocking vehicle noise by the soundproof walls, select a horizontal direction at the top of the soundproof walls. The soundproof panel cover channel fixed to the upper side of the soundproof wall and fixed to the front and rear of the soundproof panel cover channel, the lower fixed bracket body is formed in the vertical side shape, the upper side of the lower fixed bracket body to form a horizontal side in the outward direction. The upper side of the horizontal side is formed by separating the outer mounting groove and the inner mounting groove, the lower fixing bracket formed to be inclined in the outward direction of the outer mounting groove, and the end is inserted into the inner mounting groove of the lower fixing bracket by fastening and mounting. The upper portion of the inner surface plate formed in a convexly curved shape in the outward direction, the outer side of the lower fixing bracket Insert and insert the end into the mounting groove, but the upper portion is fastened to the end of the surface plate and the surface plate formed in a convexly curved shape in the outward direction, the upper surface of the upper bracket bracket body An upper fixing bracket formed at a position where the upper mounting recess and the lower mounting recess are spaced apart from each other on the upper and lower sides of the upper and lower mounting grooves, and a fixing plate fixed to the bottom of the upper fixing bracket; Disclosed is a road noise attenuator using foamed aluminum, comprising a fixed channel inserted into and fixed to a fixing groove formed on an upper surface of the upper fixing bracket.

However, such a configuration is intended to effectively attenuate the noise proceeding in the vertical direction, but the noise is attenuated by the sound absorbing action by only the portion projecting from the top to the outside has a problem that the efficiency is not high.

In addition, the above-mentioned prior arts have all the problems of difficulty in compatible installation according to the change of the width of the installation beam.

Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide a noise attenuator that can be beautiful in appearance.

Another object of the present invention is to provide a noise attenuator capable of improving noise attenuation efficiency.

Still another object of the present invention is to provide a noise attenuator that can be compatible with a change in width of an installation beam.

An object of the present invention is to provide a noise attenuator installed on top of the mounting beam to attenuate diffraction sounds, each pair of fastening members detachably fastened to both sides of the top of the mounting beam; A base panel fixed to one side of each fastening member and having a top protrusion and a side protrusion; A porous steel plate detachably fixed along an edge of an upper protrusion of the base panel; A sound absorbing material detachably fixed to the inside of the porous steel sheet by a stopper formed integrally with the base panel; It is formed in parallel from the side projection of the base panel toward the inner side by a noise attenuator composed of guide walls which form a resonance space inside the fastening member and the sound absorbing material and guide the noise rising from the bottom into the resonance space. Can be achieved.

The guide walls each have a reflective wall at the rear end, and at least a part of the reflective wall forms an open hole which opens into the resonance space, so that some of the noise is reflected from the reflective wall and the other enters the resonance space through the open hole. It is preferably configured to.

The positions of the reflecting walls are configured to have steps with adjacent reflecting walls, respectively. Accordingly, by varying the wavelength of the sound reflected from each of the reflective walls to increase the noise attenuation effect due to interference.

It is preferable to arrange a plurality of scattering walls in a zigzag form behind each of the reflecting walls.

A plurality of horizontal bars are disposed at a lower side of the protruding portion of the base panel so as to be spaced apart from the lower guide wall to form a flow space.

The horizontal bar is preferably configured in a tapered shape so that the space between the adjacent horizontal bar is gradually narrowed toward the inside.

According to another embodiment of the present invention, a sound absorbing material is installed in the circulating space.

A fastening groove is formed at an upper end of the fastening member, and a pair of fastening protrusions and extension pieces of the fastening protrusions inserted into the fastening grooves are configured to be covered by a closing member integrally formed. Providing the finishing member makes it possible to apply the compatibility according to the width of the mounting beam.

The finishing member is composed of a steel plate, and is slidably coupled from the side.

The porous steel sheet is made of an aluminum steel sheet, one side is inserted into the fixing piece, the other side is sandwiched between the stopper and the extension piece of the finishing member, at least one portion of the inner portion is screwed to the stopper for fixing the sound absorbing material.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the noise attenuator according to the present invention.

1 is a perspective view showing a configuration of a preferred embodiment of the noise attenuator according to the present invention in a state including the color, and FIG. 2 is a front view in a state where the color is removed to clarify the configuration.

According to the present invention, the pair of fastening members 10 which are separably fastened to both sides of the upper end of the installation beam 1 and the upper protrusion 22 are integrally fixed to one side of each fastening member 10. And a base panel 20 having side protrusions 24.

In addition, it includes a porous steel plate 30 that is detachably fixed along the edge of the upper protrusion 22 of the base panel 20 and a sound absorbing material 32 that is detachably fixed to the inner side of the porous steel plate (30). The sound absorbing material 32 is fixed by the plurality of stoppers 16 and 32a protruding from the base panel 20.

In addition, the base panel 20 is integrally formed with a plurality of guide walls 40 formed in parallel from the side projections 24 toward the inside thereof. The guide wall 40 forms a resonance space 26 in the inner side together with the fastening member 10 and the sound absorbing material 32, and induces and attenuates the noise rising from the lower portion into the resonance space 26.

As clearly shown in FIG. 2, the guide walls 40 each have a reflecting wall 42 at a rear end thereof, and at least a portion of the reflecting wall 42 is formed with an open hole 42a that opens to the resonance space 26. It is. According to the present invention, the positions of the reflective walls 42 are preferably configured to have a step with the adjacent reflective walls 42, respectively. What constitutes the step is to increase the attenuation effect by varying the wavelength of the reflected noise.

A plurality of scattering walls 44 are arranged in a zigzag form behind each of the reflecting walls 42.

A plurality of horizontal bars 46 are disposed at a lower side of the side protrusion part 24 of the base panel 20 so as to be spaced apart from the lower guide wall 40 to form a flow space 46a. The horizontal bar 46 is configured in a tapered shape so that the space 46b between the adjacent horizontal bars and the space 46b gradually narrows toward the inside.

5 shows another embodiment of the noise attenuator according to the invention. According to this, the sound absorbing material 48 is provided in the circulating space 46a behind the guide wall 40. Thus, by installing the sound absorbing material 48 in the circulating space it is possible to effectively cope with the noise rising from the bottom.

On the other hand, the closing member 50 for blocking the space formed on the upper end of the fastening member 10 is provided. 3 shows the configuration of the finishing member 50 in detail. Each of the fastening grooves 14 is formed to extend from the base panel 20 to be adjacent to the sound absorbing material 32 and the fixing stopper 16, and a pair of fastenings inserted into the fastening grooves 14 to the closing member 50. The protrusion 52 protrudes side by side and the extension piece 54 which extends to both sides from the fastening protrusion 52 is comprised integrally.

The finishing member 50 is preferably composed of a steel sheet of the same material as the porous steel sheet 30. Finishing member 50 is composed of a plurality of different intervals of the fastening protrusions 52 to correspond to the width change of the installation beam (1). Detailed description thereof will be provided later.

On the other hand, the porous steel sheet 30 is preferably made of an aluminum steel sheet, one side is inserted into the fixing piece 34, the other side is sandwiched between the extension piece 54 and the stopper 16 of the finishing member 50, At least one portion of the inner portion is screwed into the stopper 32a for fixing the sound absorbing material 32.

In the present invention having such a configuration, the noise rising from the bottom flows into the recirculation space through the horizontal bar 46 to form a resonance, and at the same time, the space 46b is gradually narrowed in the process of entering the recirculation space. When the space 46a is reached, the scattering is maximized to further increase attenuation efficiency through interference with noise passing through another adjacent space 46b.

In addition, the noise passing through the top of the horizontal bar is guided inward through the guide wall (40). At this time, when the noise entering the reflection wall 42 reaches the reflection, some noise enters the resonance space through the opening hole (42a) to achieve a resonance and attenuation. By forming the scattering wall 44 at the rear end of the opening hole 42a, reflection and scattering of noise flowing through the opening hole 42a can be induced to increase attenuation efficiency.

In addition, the reflected sound reflected from the reflecting wall 42 continues to collide with the noise entering along the guide wall 40 and achieve a damping effect. In this case, since the phases of the adjacent reflection walls 42 are different from each other, the reflection time at each of the induction walls 40 is different, so the wavelengths of the noises reflected between each of the induction walls 40 are different. Can be effectively attenuated.

On the other hand, the noise passing through the guide wall 40 and diffracted upward enters the hole of the porous steel plate 30 and is absorbed and extinguished in the sound absorbing material 32 disposed therein. Therefore, the noise attenuator according to the present invention can minimize the noise generated from one side to the other side, and since the symmetrical structure is formed on both sides as shown in the illustrated embodiment, even when the noise occurs on both sides, the noise is opposite to each other. Because it limits the crossing, it can be used suitably for the central partition wall of the road.

In particular, in the present invention, when the porous steel sheet 30 is damaged, the screw (not shown) fastened to the stopper 32a is loosened, and both ends thereof can be separated from the lower side of the support piece 34 and the extension piece, respectively. . In addition, since the new steel plate can be installed in the reverse order, the replacement work according to the steel plate damage can be easily performed.

Meanwhile, as shown in FIG. 4, when the width of the installation beam 1 is large, the fastening member 10 is maintained in a spaced apart state. The present invention can effectively cope with this situation by using the finishing member (50). That is, by preparing the finishing member 50 of the other standard to match the changed width is to achieve the actual construction by closing the space of the fastening member 10. More specifically, since the actual installation beam 1 is about three types, the interval between the fastening member 10 has three types of intervals accordingly. Therefore, it is possible to easily cope with the change in the width of the installation beam by providing the finishing member 50 according to the type of the mounting beam in advance and appropriately used.

In the case where the width of the mounting beam 1 is widened so that a gap between the fastening members 10 occurs, a spacer 18 is inserted between the fastening members 10 and screws 19 as shown in FIG. 4 during assembly. By making a fastening, the shaking of a plate-shaped fastening member, etc. can be prevented.

The present invention is fixed to the upper portion of the installation beam (1) as shown in Figures 6 and 7, and several are arranged in a line in the illustration to form a guide wall side by side.

The present invention is not limited to the above-described embodiment, and includes matters related to the addition and change of necessary technical configurations within the scope without departing from the spirit and technical scope of the present invention.

As described above, the noise attenuator according to the present invention has a curved shape of the base panel, and the guide wall and the horizontal bar are installed along the curve, and at the same time, the sound absorbing material and the color steel plate are provided on the outside thereof to enhance the appearance. It can be attenuated by absorption and interference in the induction wall and horizontal bar to improve the noise attenuation efficiency. Furthermore, it provides a pair of separable fastening members, which can be used to finish the installation beam. It has the effect that can be applied compatible with the width change of.

Claims (10)

In constructing a noise attenuator installed on top of the installation beam to attenuate diffraction sounds, A pair of fastening members each detachably fastened to both sides of the upper end of the installation beam, A base panel fixed to one side of each fastening member and having a top protrusion and a side protrusion; A porous steel plate detachably fixed along an edge of an upper protrusion of the base panel; A sound absorbing material detachably fixed to the inside of the porous steel sheet by a stopper formed integrally with the base panel; It is formed in parallel from the side projection portion of the base panel toward the inside and formed with a fastening member and the sound absorbing material to form a resonance space on the inside, and at the same time composed of the guide walls to guide the noise rising from the bottom to the resonance space Noise attenuator The method of claim 1, wherein the guide walls each have a reflective wall at the rear end, at least a portion of the reflective wall to form an open hole to open to the resonance space, so that some of the noise is reflected from the reflective wall, the rest of the opening hole Noise attenuator, characterized in that it enters the resonance space through. 3. The noise attenuator of claim 2, wherein the positions of the reflecting walls are configured to have steps with adjacent reflecting walls, respectively. 4. The noise attenuator of claim 3, wherein a plurality of scattering walls are arranged in a zigzag form behind each of the reflecting walls. The noise attenuator according to any one of claims 1 to 4, wherein a plurality of horizontal bars are disposed at a lower side of the side protruding portion of the base panel so as to be spaced apart from the lowermost guide wall to form a flow space. . 6. The noise attenuator of claim 5, wherein the horizontal bars are formed in a tapered shape such that the space between adjacent horizontal bars and the space between the adjacent horizontal bars becomes narrower toward the inside. 7. The noise attenuator of claim 6, wherein a sound absorbing material is installed in the return space. The method of claim 1, wherein a fastening groove is formed at an upper end of the fastening member, and a pair of fastening protrusions and extending extensions of the fastening protrusions, which are inserted into the fastening grooves, are covered by an integrally formed closing member. Noise attenuator. 9. The noise attenuator of claim 8, wherein the finishing member is made of an aluminum steel sheet and is slidably coupled from a side surface. 10. The method according to claim 9, wherein the porous steel sheet is made of an aluminum steel sheet, one side is inserted into the fixing piece, the other side is sandwiched between the stopper and the extension piece for fixing the sound absorbing material, at least one portion of the inner portion for fixing another sound absorbing material Noise attenuator characterized in that it is screwed into the stopper.

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