WO2003035985A1

WO2003035985A1 - Single body type soundproof panel for walls

Info

Publication number: WO2003035985A1
Application number: PCT/KR2002/000770
Authority: WO
Inventors: Won-Woo Lee
Original assignee: Enp Co., Ltd.
Priority date: 2001-10-26
Filing date: 2002-04-26
Publication date: 2003-05-01
Also published as: KR100412068B1; JP2005506478A; KR20030034673A

Abstract

The object of this invention is to provide a single body type soundproof panel, which is easily produced and installed, as well as having a good appearance, an improved soundproofing effect and a dust removing effect. This soundproof panel consists of a body (120) with two spaced sheets (102, 104). A locking part (110), having tensile pieces (112) and locking slots (114), is formed at each end of the body (120) for coupling several panels to build a wall. The front sheet (102) has linear embossments (122) and suction slots (124). The interior of the body (120) is partitioned into three sound absorbing chambers (134, 136, 138) by partition walls (142). The bottom wall (144) of the body (120) is inclined at an angle, with coupling pipes (128) provided at the lower surface of the bottom wall (144). The body (120) is covered with a cover (150) at its top.

Description

SINGLE BODY TYPE SOUNDPROOF PANEL FOR WALLS

Technical Field

The present invention relates, in general, to single body type soundproof panels made of plastic for soundproof walls and, more particularly, to a single body type soundproof plastic panel, which is easily and quickly installed to build such a soundproof wall, as well as having a good appearance, since the H-beam type support frames jointing the panels together are not exposed to the outside of the wall, and which has a chambered interior, thus forming independent sound absorbing chambers capable of effectively arresting even weak noises, such as low frequency noises, when a wall is built by installing the panels in a vertical direction, and which effectively discharges impurities, such as dust and rain water, from its interior to the outside, and which is easily produced in the form of a single structure through a plastic injection molding process, thus being reduced in its production cost.

Background Art

As well known to those skilled in the art, soundproof walls, designed to accomplish a soundproofing effect by absorbing, dispersing and attenuating noise waves, are preferably built on some areas requiring to be exclusion of street noise, such as schools, hospitals or residential areas located around noisy streets. Industrial development nowadays is accompanied with a rapid increase in the number of vehicles running on streets and the number of machines running in a variety of plants, thus inevitably and quantitatively increasing ear-splitting noise and enlarging the areas adversely affected by such noise. The noise generated from such vehicles and machines upsets people around the noise sources, and so the noise has been recognized as an environmental pollution, so-called a "noise pollution". It is thus necessary to suppress or arrest noise in an effort to protect people from such noise. Soundproof walls have been proposed and widely used as one means for protecting people from such noise.

Soundproof walls constructed using two types of conventional soundproof panels are shown in FIGS, la and lb. In the soundproof wall of FIG. la, a plurality of soundproof panels 10 are arranged such that the edge surfaces of two panels are positioned along both side surfaces of the web of an H-beam used as a support frame 1. In such a case, the support frame 1 firmly stands upright on a support surface while being fixed to the support surface by anchor bolts (not shown). After arranging two panels 10 relative to each support frame 1, fixtures 2 are tightly inserted in the gaps between each panel 10 and the flanges of the H- beam type frame 1, thus fixing the panel 10 to the frame 1. In the soundproof wall of FIG. lb, two soundproof panels 10 are slidably assembled at their edges with an H-beam type support frame 1. In this soundproof wall, each panel 10 is increased in its thickness to be almost equal to the width of the web of the support frame 1. Such an increase in the thickness of each panel 10 is accomplished by an increase in the thickness of a sound absorbing material filling the interior ofthe panel 10. In the soundproof wall of FIG. lb, the outside flange of the support frame 1 is covered with a surface finishing cover 12 integrally formed along the facing edges ofthe panels 10, thus being concealed from the outside ofthe wall.

However, the soundproof panel of FIG. la is problematic in that it forces a worker to insert the fixtures into the gaps between the panel and the flanges of a

H-beam type support frame, thus being inconvenient to the worker while constructing a wall using such panels. In addition, the support frame does not firmly support the panels, and is exposed at its flanges to the outside of the wall, thus degrading the appearance of the wall. Furthermore, since the panel does not have a sufficient thickness, it is inferior in its soundproofing effect. In comparison with the panel of FIG. la, the soundproof panel of FIG. lb somewhat improves the appearance of a resulting soundproof wall, since the outside flange of each H-beam type support frame is covered with the surface finishing cover integrally formed along the edge of the panel. However, this panel does not provide a desired flat surface of the wall due to the surface finishing covers projecting outward from the surfaces ofthe panels. The outer surfaces of such conventional soundproof panels are typically made of aluminum. However, such aluminum sheets of the panels are inferior in their mechanical strengths, and so they may be easily damaged, deformed, or punctured by external impact. The aluminum sheets also may easily oxidize after construction of a soundproof wall using the panels, and so the sheets easily become dirty and fade to degrade the street environment. The conventional soundproof panels with such aluminum sheets undesirably allow their fastening members to be loosened due to repeated vibrations generated by vehicles running around a soundproof wall, thus generating noise at the gaps between the loosened parts and reducing its soundproofing effect. The sound absorbing materials filling the interior ofthe panels, such as glass fibers, cause environmental pollution when they are wetted by rain and leaks to the environment. Furthermore, the glass fiber used as the sound absorbing material in the conventional soundproof panels has been recognized as a carcinogenic substance, and so the use of such glass fibers is strictly limited.

Disclosure ofthe Invention

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a single body type soundproof plastic panel for walls, which is easily and quickly installed to build a soundproof wall, and is enhanced in its durability, as well as having a good appearance, since the support frames used for jointing the panels when building the soundproof wall are not exposed to the outside of the wall, and which has a chambered interior, thus forming independent sound absorbing chambers capable of effectively arresting high frequency noise, low frequency noise and gap noise, when a soundproof wall is built by installing a plurality of panels in a vertical direction to form a desired height of the wall, and which effectively discharges impurities and water from its interior to the outside, and which is easily produced in the form of a single structure through a plastic injection molding process, thus being reduced in its production cost. In order to accomplish the above object, the present invention provides a single body type soundproof panel for walls, comprising a body consisting of front and rear sheets, with a sound absorbing material set in the body, further comprising: a locking part integrally formed at each end of the body for coupling several panels to each other, with a plurality of tensile pieces vertically formed along the locking part at regular intervals, and a plurality of locking slots formed along the central axis of the locking part while being each curved at a predetermined radius of curvature; a plurality of linear embossments and a plurality of suction slots horizontally and regularly formed on the front sheet, each of the linear embossments being inclined downward at the upper surface thereof at an angle of θl relative to a horizontal axis perpendicular to a surface of the front sheet, and being inclined upward at the lower surface thereof at an angle of Θ2 relative to the horizontal axis; a longitudinal covering rail horizontally formed along the lower end of the front sheet; a plurality of coupling pipes formed on the lower surface of the bottom wall of the body while extending downward from the bottom wall, the bottom wall being inclined at an angle of Θ3; first, second and third sound absorbing chambers defined in the interior ofthe body by a plurality of partition walls; and a cover detachably covering a top ofthe body.

In the single body type soundproof panel, the front sheet is provided with a drain hole at the lower end thereof, and the coupling pipes are closed at top ends thereof and are connected to each other at sidewalls thereof by a plurality of connecting ribs.

The locking slots, formed along the central axis of the locking part while being each curved at the predetermined radius of curvature, allow the panels to be angularly coupled to each other to form a curved part of a soundproof wall. In the single body type soundproof panel, the first and third sound absorbing chambers have the same width, and noise transmitted into the panel through the front sheet is primarily absorbed and dispersed by the sound absorbing material, thus being primarily attenuated, and is, thereafter, reflected and dispersed in the third sound absorbing chamber to be secondarily attenuated. Brief Description ofthe Drawings

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIGS, la and lb are sectional views of parts of walls constructed using soundproof panels according to different embodiments ofthe prior art;

FIG. 2 is a perspective view of a single body type soundproof panel for walls in accordance with the preferred embodiment ofthe present invention;

FIG. 3 is a front view of the single body type soundproof panel according to the preferred embodiment of this invention;

FIG. 4 is a longitudinal section of the single body type soundproof panel according to the preferred embodiment ofthis invention;

FIG. 5 is a sectional view ofthe portion "A" of FIG. 3;

FIG. 6 is a sectional view ofthe portion "B" of FIG. 3; FIG. 7 is a sectional view ofthe portion "C" of FIG. 3;

FIG. 8 is a sectional view ofthe portion "D" of FIG. 3;

FIGS. 9a, 9b and 9c are sectional views, showing the operational effect of the single body type soundproof panel ofthis invention.

Best Mode for Carrying Out the Invention

Reference should now be made to the drawings, in which the same reference numerals are used throughout the different drawings to designate the same or similar components.

As shown in FIGS. 2 to 9c, the soundproof panel 100 of this invention consists of a body 120 with two parallely spaced sheets 102 and 104. A locking part 110, having a plurality of tensile pieces 112 and locking slots 114, is formed at each end of the body 120 for coupling several panels 100 in a line to build a soundproof wall. In each locking part 110, the tensile pieces 112 are formed along the part 110 at regular intervals, with a plurality of locking slots 114 regularly formed along the central axis of each locking part 110. Each locking slot 114 is curved at a predetermined radius of curvature to form a rounded cutout. Of the two sheets 102 and 104, the front sheet 102 has a plurality of linear guide embossments 122 and suction slots 124. In such a case, the linear guide embossments 122 are horizontally arranged on the front sheet 102 at regular intervals, with the slots 124 arranged between the embossments 122. In each of the linear embossments 122, the upper surface is inclined downward at an angle of θl relative to a horizontal axis perpendicular to the surface ofthe sheet 102, while the lower surface is inclined upward at an angle of Θ2 relative to the horizontal axis. A longitudinal covering rail 126 is horizontally formed along the lower end of the front sheet 102. The above rail 126 extends forward from the sheet 102 and is bent downward at its end, thus forming an inverted L-shaped cross-section. Several coupling pipes 128 are formed on the lower surface of a bottom wall 144 of the body 120 while extending downward from the bottom wall 144. The interior of the body 120 is partitioned into first, second and third sound absorbing chambers 134, 136 and 138 by a plurality of partition walls 142. The bottom wall

144 of the body 120 is inclined at an angle of 03, with the coupling pipes 128 formed on the lower surface of the inclined bottom wall 144. The body 120 may be covered with a cover 150 at its top. The cover 150 is used for detachably covering the top of the body 120 when it is desired to chamber the interior of the body 120.

A drain hole 106 is formed at the lower end of the front sheet 102 so as to allow the bottom of the interior of the body 120 to communicate with the atmosphere. The coupling pipes 128 are closed at their top ends by the bottom wall 144, and are connected to each other at their sidewalls by connecting ribs

128'.

Due to the rounded locking slots 114 regularly formed along the central axes of both ends ofthe body 120, it is possible to angularly arrange the panels 100 around support frames such that the panels 100 form a curved wall when necessary. Noise transmitted into each panel 100 through the front sheet 102 is primarily absorbed by the sound absorbing material 132 set in the second chamber 136, thus being primarily attenuated. The primarily attenuated noise is, thereafter, reflected and dispersed in the third chamber 138 to be transmitted to the sound absorbing material 132, thus being secondarily attenuated by the material 132. The process of attenuating noise in this panel 100 will be described in more detail later herein.

In the present invention, it is preferred to set the angles θl and Θ2 of each linear embossment 122 ofthe front sheet 102 to 20 ~ 30° and 5 ~ 10°, respectively. In addition, the first and third chambers 134 and 138 preferably have the same width "A", and the width "A" is preferably set to 5 ~ 10 cm. FIG. 2 is a perspective view of the single body type soundproof plastic panel of this invention. This drawing shows the construction of the panel 100 in detail. That is, as apparent from the drawing, the front and rear surfaces of the body 120 ofthis soundproof panel 100 are formed by the front and rear sheets 102 and 104, respectively. The locking part 110 is integrally formed at each end of the body 120. The linear guide embossments 122 are horizontally formed on the front sheet 102 at regular intervals, while the suction slots 124 are formed on the front sheet 102 between the embossments 122. The longitudinal covering rail 126, bent downward along its end, is horizontally formed on the front sheet 102 at a position around the lower end of the sheet 102. The coupling pipes 128, closed at their top ends by the bottom wall 144 and connected to each other at their sidewalls by the connecting ribs 128', are provided on the lower surface of the bottom wall 144 of the body 120 in a way such that the pipes 128 extend downward.

The locking slots 114, curved at a predetermined radius of curvature to form the rounded cutouts, are regularly formed along the central axis of each locking part 110 provided at each end of the panel body 120. Each of the linear guide embossments 122 of the front sheet 102 is inclined downward at its upper surface at a predetermined angle relative to the horizontal axis perpendicular to the surface ofthe sheet 102. FIG. 3 is a front view of the soundproof plastic panel of this invention.

FIG. 4 is a longitudinal section of the soundproof plastic panel of this invention. As shown in the drawings, the interior of the body 120 of the panel 100 is partitioned into the first, second and third sound absorbing chambers 134, 136 and 138 by the partition walls 142. Of the three chambers, the first and third chambers 134 and 138 have the same width "A", while the second chamber 136 contains the sound absorbing material 132 therein. The bottom wall 144 of the body 120 is inclined downward in a forward direction at the predetermined angle ofθ3.

The front sheet 102 has the drain hole 106 at its lower end. The width "A" ofthe first and third chambers 134 and 138 is preferably set to 5 ~ 10 cm. In addition, it is preferred to set the inclination angle Θ3 ofthe bottom wall 144 to 2 ~

10°.

FIG. 5 is a sectional view of the portion "A" of FIG. 3. This drawing shows that a locking part 110 is formed at each end of the body 120, with the locking slots 114 regularly formed along the central axis of the locking part 110 such that they are curved at a predetermined radius of curvature to form rounded cutouts. FIG. 6 is a sectional view of the portion "B" of FIG. 3. This drawing shows that the tensile pieces 112 are formed in a vertical direction along the locking part 110, which is formed at each end ofthe body 120.

FIG. 7 is a sectional view of the portion "C" of FIG. 3. This drawing shows that the interior ofthe body 120 is partitioned into the first, second and third sound absorbing chambers 134, 136 and 138 by the partition walls 142, with the bottom wall 144 of the body 120 inclined at the angle of Θ3 preferably set to 2 ~ 10°. FIG. 8 is a sectional view of the portion "D" of FIG. 3. This drawing shows that the linear guide embossments 122 and the suction slots 124 are horizontally formed on the front sheet 102 such that the linear guide embossments

122 are arranged on the front sheet 102 at regular intervals, with the slots 124 arranged between the embossments 122.

FIGS. 9a, 9b and 9c are sectional views, showing the use of the single body type soundproof panel ofthis invention. FIG. 9a shows that two panels 100 are firmly assembled with an H-beam type support frame 101 at both sides of said frame 101 when arranging the panels 100 around the support frame 101 to form a planar part of a soundproof wall. In such a case, the tensile pieces 112 of the locking parts 110 provided at the facing ends of the two panels 100 are brought into compression and firictional contact with the internal surfaces of the flanges of the H-beam type support frame 101, thus firmly holding the two panels 100 to the support frame 101. The external surfaces ofthe flanges ofthe support frame 101 are almost completely covered with the sheets 102 and 104 of the two panels 100, thus being concealed from the outside of the wall. FIG. 9b shows panels 100 installed in a vertical direction to accomplish a desired height of the soundproof wall. In such a case, the tensile pieces 112 of the locking parts 110 of the panels 100 are in compression and frictional contact with the internal surfaces of the flanges of the H-beam type support frame 101 to firmly hold the panels 100 to the support frame 101, and the coupling pipes 128 of an upper panel 100 are fitted into the open top of a lower panel 100 to stably seat the upper panel on the lower panel.

When assembling the panels 100 with such an H-beam type support frame 101, the rigid flanges of the support frame 101 elastically and inwardly deform the tensile pieces 112 of the locking parts 110 of each panel 100, and so the tensile pieces 112 tend to restore their original positions, thus firmly holding the panel 100 to the support frame 101.

FIG. 9c shows an angular arrangement of panels around a cylindrical support frame when the panels are used for forming a curved part of the wall. In order to form such a curved part of the soundproof wall using the panels 100, a cylindrical support frame primarily stands upright on a support surface at a desired position. Thereafter, two panels 100 are arranged at both sides of the cylindrical support frame to form a desired angle between the two panels 100 such that the locking slots 114, having a predetermined radius of curvature and formed at the locking parts 10 provided at the facing ends of the panels 100, are assembled with the sidewall ofthe support frame.

The operational effect of the single body type soundproof panel of this invention will be described herein below. As shown in FIGS. 2 to 9c, a locking part 110, with the regularly spaced tensile pieces 112 and the rounded locking slots 114 having a predetermined radius of curvature, is integrally formed at each end of the body 120 of the panel 100 consisting of the front and rear sheets 102 and 104. The linear guide embossments 122 and the suction slots 124 are horizontally formed on the front sheet 102 at regular intervals. In each of the linear embossments 122, the upper surface is inclined downward at the angle of θl relative to a horizontal axis perpendicular to the surface of the sheet 102, while the lower surface is inclined upward at the angle of Θ2 relative to the horizontal axis. The longitudinal covering rail 126 is horizontally formed along the lower end ofthe front sheet 102. This rail 126 extends forward from the sheet 102 and is bent downward at its end. The downwardly extending coupling pipes 128 are formed on the lower surface of the bottom wall 144 of the body 120. The interior of the body 120 is partitioned into the first, second and third sound absorbing chambers 134, 136 and 138 by the partition walls 142. The bottom wall 144 of the body 120 is inclined at the angle of Θ3. The body 120 may be covered with the cover 150 at its top. Formed at the lower end ofthe front sheet 102 is the drain hole 106, which allows the bottom of the interior of the body 120 to communicate with the atmosphere. The coupling pipes 128 are closed at their top ends by the bottom wall 144, and are connected to each other at their sidewalls by the connecting ribs 128'. Due to the locking slots 114 formed along the central axis of each end ofthe panel's body 120 and curved at a predetermined radius of curvature, the panel 100 is preferably used for building a soundproof wall having a curved section. In order to build such a soundproof wall using the panels 100 on an area requiring exclusion of street noise, such as a school, a hospital or a residential area located around a noisy street, a plurality of H-beam type support frames 101 are primarily vertically installed along a concrete base structure (not shown) at regular intervals.

After the installation of the support frames 101, the panels 100 are assembled with the frames 101 to form a desired soundproof wall separating the desired area from a noisy street. In such a case, the panels 100 are firmly assembled with the H-beam type support frames 101 as follows. That is, two panels 100 arranged at both sides of a support frame 101 are firmly assembled with said frame 101 since the tensile pieces 112 ofthe locking parts 110 provided at the facing ends of the two panels 100 are brought into compression and frictional contact with the internal surfaces of the flanges of the H-beam type support frame 101. In such a case, the external surfaces of the flanges of the support frame 101 are almost completely covered with the sheets 102 and 104 of the two panels 100, thus being concealed from the outside ofthe wall.

Such an assembling of the panels 100 with the support frames 101 is repeated while installing a plurality of panels 100 in a vertical direction until a desired height of the soundproof wall is accomplished. Of course, the number of panels 100 to be installed along each side of one support frame 101 is determined in accordance with a desired height of the soundproof wall. When installing the panels 100 in the vertical direction, the coupling pipes 128 of an upper panel 100 are fitted into the open top of a lower panel 100 to stably seat the upper panel on the lower panel. In such a case, the first, second and third sound absorbing chambers 134, 136 and 138, provided in the interior of each panel 100 and partitioned by the partition walls 142, are isolated from each other at the top of the panel 100 by the connecting ribs 128' of the coupling pipes 128 provided at an upper panel 100, thus forming independent sound absorbing chambers. After installing a predetermined number of panels 100 to accomplish a desired height of the wall, the open top of each uppermost panel 100 is covered with the cover 150, and so the interior of each uppermost panel 100 is chambered.

The soundproofing effect of this panel 100 is accomplished as follows: Noise transmitted into each panel 100 of a soundproof wall through the front sheet 102 is repeatedly attenuated in the first, second and third sound absorbing chambers 134, 136 and 138 of the panel's body 120 partitioned by the partition walls 142, in which the second chamber 136 contains the sound absorbing material

132, and the first and third chambers 134 and 138 have the same width "A". In a detailed description, the noise transmitted into each panel 100 of the soundproof wall through the suction slots 124 of the front sheet 102 passes through the first chamber 134 to be transmitted to the sound absorbing material 132 inside the second chamber 136. The noise is thus absorbed and dispersed by the sound absorbing material 132, thus being primarily attenuated. The primarily attenuated noise is, thereafter, transmitted into the third chamber 138, and is reflected by the interior surfaces of said third chamber 138, thereby being transmitted to the sound absorbing material 132 again. The noise is thus absorbed and dispersed again in the sound absorbing material 132 to be secondarily attenuated. The noise may still not be fully damped after the primary and secondary sound attenuating actions. However, since the interior ofthe panel 100 is chambered while defining the three independent sound absorbing chambers 134, 136 and 138 by the ribs 128' ofthe coupling pipes 128 of an upper panel 100, the remaining noise cannot escape from the interior of the panel 100 to the atmosphere, but is still captured in the tliree chambers 134, 136 and 138 while being repeatedly reflected, dispersed, and absorbed, thus being almost completely arrested. Therefore, the soundproof wall built using the panels of this invention almost completely arrests low frequency noise, as well as high frequency noise.

Due to the specific design of the linear guide embossments 122, noise is smoothly transmitted into the first chamber 134 of each panel 100 of a soundproof wall through the suction slots 124 of the front sheet 102, and so the soundproofing effect ofthe panel 100 is further improved. That is, the linear guide embossments 122 are horizontally arranged on the front sheet 102 at regular intervals, with the slots 124 arranged between the embossments 122. In addition, the upper surface of each linear embossment 122 is inclined downward at an angle of θl, while the lower surface is inclined upward at an angle of Θ2 as best seen in FIG. 8. Therefore, noise is smoothly transmitted into the panel 100 through the suction slots 124 under the guide of the inclined upper and lower surfaces of the linear embossments 122. In addition, the longitudinal covering rail 126 having an inverted L- shaped cross-section is horizontally formed along the lower end of each panel's front sheet 102. Therefore, the gaps between upper and lower panels in the vertically installed panel structure are all covered by the covering rails 126 of the upper panels, and so the panel 100 ofthis invention accomplishes a desired smooth surface appearance of a soundproof wall as if the wall was built using one panel.

The covering rail 126 also accomplishes a collateral effect of almost completely preventing gap noise that may be generated from such gaps between panels.

The effect of preventing such gap noise is enhanced by the connecting ribs 128', which are formed at the coupling pipes 128 provided on the lower surface of the bottom wall of each panel's body 120. Since the panels 100 of this invention constituting a soundproof wall are kept outdoors, particularly along a street, a variety of impurities, such as dust, smoke and rain water, may be introduced into the panels 100 through the suction slots 124 of the front sheets 102 so as to be deposited on the bottoms of the panels 100, particularly on the bottoms of the first chambers 134. When impurities are deposited on the bottoms of the panels 100 as described above, the soundproofing effect of said panels 100 may be reduced. However, the panels 100 of this invention are designed such that the bottom wall 144 of the panel body 120 is inclined downward in the forward direction at a predetermined angle of Θ3, and the drain hole 106 is formed at the lower end of the front sheet 102 as best seen in FIG. 7. Therefore, the impurities, such as dust, smoke and rain water, which are introduced into the panel 100 through the suction slot 124 of the front sheet 102, are not deposited on the bottom ofthe panel 100, but flow down along the inclined surface of the bottom wall 144 so as to be discharged to the outside of the panel 100 through the drain hole 106. The panel 100 ofthis invention is thus prevented from a reduction in its soundproofing effect and is protected from corrosion caused by such a deposition of impurities on the bottom of the panel 100, and thereby remains clean for a desired lengthy period of time.

In the present invention, when the angles 01 and 02 of each linear embossment 122 of the front sheet 102 are set to 20 ~ 30° and 5 ~ 10°, respectively, the embossments 122 most effectively guide noise to the suction slots

124. In addition, when the inclination angle Θ3 of the bottom wall 144 is set to 2 ~ 10°, and the width "A" of the first and third chambers 134 and 138 is set to 5 ~ 10 cm, the panel 100 has the best soundproofing effect.

When it is desired to form a curved part of a soundproof wall using the panels 100, the panels 100 are coupled to each other using a cylindrical support frame in place of the H-beam type support frame 101 of FIG. 9a. That is, since the locking slots 114, each curved at a predetermined radius of curvature, are regularly formed along the central axis of each locking part 110 of the panel body 120, the panels 100 are rotatably coupled to the cylindrical support frame at the locking slots 114 as shown in FIG. 9b. It is thus possible to build a curved part of a soundproof wall using the panels 100 ofthis invention.

The panels 100 of this invention are preferably used for building soundproof walls installed in noisy factories or subway stations, as well as on areas requiring exclusion of street noise, such as schools, hospitals or residential areas located around noisy streets.

Industrial Applicability

As described above, the present invention provides a single body type soundproof panel made of plastic for soundproof walls, which is easily and quickly installed to build such a wall, and has improved durability, as well as having a good appearance, since the support frames using H-beams jointing the panels to each other are not exposed to the outside of the wall. The panel also has a chambered interior, thus forming independent sound absorbing chambers capable of effectively arresting noises, such as high frequency noises, low frequency noises and gap noises. This panel also effectively discharges impurities, such as dust and rain water, from its interior to the outside, thus remaining clean to keep its soundproofing effect for a lengthy period of time. The panel of this invention is easily produced in the form of a single structure through a plastic injection molding process, thus being reduced in its production cost.

Claims

1. A single body type soundproof panel for walls, comprising a body consisting of front and rear sheets, with a sound absorbing material set in said body, further comprising: a locking part integrally formed at each end of said body for coupling several panels to each other, with a plurality of tensile pieces vertically formed along said locking part at regular intervals, and a plurality of locking slots formed along a central axis ofthe locking part while being each curved at a predetermined radius of curvature; a plurality of linear embossments and a plurality of suction slots horizontally and regularly formed on said front sheet; a plurality of coupling pipes formed on a lower surface of a bottom wall of said body while extending downward from said bottom wall, the bottom wall being inclined at an angle of Θ3; first, second and third sound absorbing chambers defined in an interior of said body by a plurality of partition walls; and a cover detachably covering a top of said body.

2. The single body type soundproof panel according to claim 1, wherein said front sheet is provided with a drain hole at a lower end thereof, and said coupling pipes are closed at top ends thereof and are connected to each other at sidewalls thereof by a plurality of connecting ribs.

3. The single body type soundproof panel according to claim 1, wherein said locking slots, formed along the central axis of the locking part while being each curved at the predetermined radius of curvature, allow the panels to be angularly coupled to each other to form a curved part of a soundproof wall.

4. The single body type soundproof panel according to claim 1, wherein said first and third sound absorbing chambers have the same width, and noise transmitted into the panel through the front sheet is primarily absorbed and dispersed by the sound absorbing material, thus being primarily attenuated, and is, thereafter, reflected and dispersed in the third sound absorbing chamber to be secondarily attenuated.

5. The single body type soundproof panel according to claim 1, wherein each of said linear embossments of the front sheet is inclined downward at an upper surface thereof at an angle of θl relative to a horizontal axis perpendicular to a surface of said front sheet, and is inclined upward at a lower surface thereof at an angle of Θ2 relative to said horizontal axis.