KR200363692Y1 - Soundproof panel - Google Patents
Soundproof panel Download PDFInfo
- Publication number
- KR200363692Y1 KR200363692Y1 KR20-2004-0018208U KR20040018208U KR200363692Y1 KR 200363692 Y1 KR200363692 Y1 KR 200363692Y1 KR 20040018208 U KR20040018208 U KR 20040018208U KR 200363692 Y1 KR200363692 Y1 KR 200363692Y1
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- KR
- South Korea
- Prior art keywords
- edge cover
- panel
- soundproof panel
- sound insulation
- soundproofing
- Prior art date
Links
- 238000009413 insulation Methods 0.000 claims abstract description 21
- 239000011358 absorbing material Substances 0.000 claims abstract description 9
- 239000002023 wood Substances 0.000 claims description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0011—Plank-like elements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0064—Perforated plate or mesh, e.g. as wall facing
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0064—Perforated plate or mesh, e.g. as wall facing
- E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8428—Tray or frame type panels or blocks, with or without acoustical filling containing specially shaped acoustical bodies, e.g. funnels, egg-crates, fanfolds
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8433—Tray or frame type panels or blocks, with or without acoustical filling with holes in their face
- E04B2001/8438—Slot shaped holes
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
본 고안은 상하로 적층 설치되는 방음판넬들의 대접부위를 통과하는 소음을 효율적으로 차단할 수 있도록 구성하여서, 방음성능을 획기적으로 향상시켜 주는 고품질의 방음판넬을 제공하기 위한 것이다.The present invention is to provide a high-quality soundproofing panel that is configured to effectively block the noise passing through the reception portion of the soundproofing panels stacked up and down, to significantly improve the soundproofing performance.
본 고안의 방음판넬은 서로 간격을 두고 마주하는 전면 및 후면판(10)(20)과, 상기 전면 및 후면판(10)(20) 사이에 배치되는 흡음재(30)와, 상기 전면 및 후면판(10)(20) 사방의 테두리를 감싸서 밀봉시켜 주는 테두리커버(40a, 40b, 40c, 40d)들로 구성된 것에 있어서, 상기 테두리커버(40a, 40b, 40c, 40d)들 중 상부 테두리커버(40a)의 상단과 하부 테두리커버(40b)의 하단에 서로 대칭이 되도록 폭방향으로 단차지는 차음용 단턱(41a)(41b)를 형성하여서 된 것이다.The soundproof panel of the present invention has a front and rear panel 10 and 20 facing each other at intervals, and a sound absorbing material 30 disposed between the front and rear panel 10 and 20, and the front and rear panel. (10) (20) The edge cover (40a, 40b, 40c, 40d) of the edge cover (40a, 40b, 40c, 40d) that wraps around and seals the four sides of the upper edge cover (40a) At the top of the bottom and the bottom of the lower edge cover (40b) is to form a stepped sound insulation step (41a, 41b) stepped in the width direction to be symmetrical to each other.
Description
본 고안은 상하로 적층 설치되는 방음판넬들의 대접부위를 통과하는 소음을 차단할 수 있게 하여 주는 방음판넬에 관한 것이다.The present invention relates to a soundproof panel that makes it possible to block the noise passing through the reception portion of the soundproof panels are installed up and down.
이전부터 각종의 공사현장이나 도로 또는 철도 등의 소음발생구역과 주변생활구역의 경계에는, 그 소음발생구역으로부터 주변생활구역으로 전파되는 소음을 차단하도록 방음판넬을 설치하여서, 주변생활구역 내에서 생활하는 거주자가 소음으로 인하여 겪게되는 불편을 해소하여 주도록 하였다.In the past, soundproof panels have been installed at the boundaries of various construction sites, roads, railways, etc. and surrounding living areas to block the noise propagating from the noise generating area to the surrounding living areas. Residents to solve the inconvenience caused by noise.
상기한 사용목적을 달성하고자 이미 다양한 방음판넬이 개발되어 있으며 그 중의 하나는 도 1 및 도 2에 도시된 바와 같이, 소요크기의 평면적을 가지는 전면판(110)과, 상기 전면판(110)과 상응하는 평면적을 가지며 그 전면판과 간격을 두고 배치되는 후면판(120)과, 상기 전면 및 후면판(110)(120) 사이에 배치되어서 소음을 흡수 제거하는 흡음재(130)와, 상기 전면 및 후면판(110)(120) 사방의 테두리를 감싸서 밀봉시켜 주는 테두리커버(140a, 140b, 140c, 140d)들로서 구성되었다. 이러한 방음판넬(100)은 도 3에 도시된 바와 같이, 지면위에 설치되는 지지기둥 (200)들 사이에 상하로 적층시켜서, 소음발생구역에서 발생된 소음이 후면판(120)의 흡음홀(121)을 통하여 내부로 유입되게 하고 흡음재(130)로 흡수 제거하여서 방음기능을 발휘할 수 있도록 하였다.Various sound insulation panels have already been developed in order to achieve the above-mentioned purpose of use, and one of them is a front plate 110 having a planar size of a required size, and the front plate 110 as shown in FIGS. 1 and 2. A rear plate 120 having a corresponding planar area and spaced from the front plate, a sound absorbing material 130 disposed between the front and back plates 110 and 120 to absorb and remove noise, and the front and The rear plates 110 and 120 were formed as edge covers 140a, 140b, 140c, and 140d that surround and seal the edges of the four sides. As shown in FIG. 3, the sound insulation panel 100 is stacked up and down between the support pillars 200 installed on the ground, so that the noise generated in the noise generating area is the sound absorbing hole 121 of the rear plate 120. ) To be introduced into the inside and absorbed and removed by the sound absorbing material 130 to exert a soundproof function.
그러나, 이와 같은 종래의 방음판넬(100)은 지지기둥(200)들 사이에 상하로 적층시켜서 설치한 상태에서, 하부측에 위치하는 방음판넬의 상부 테두리커버(140a)와 상부측에 위치하는 방음판넬의 하부 테두리커버(140b)가 서로 평탄하게 맞대어진 대접부위를 통하여 소음이 외부로 전파되어서, 방음판넬로서 요구되는 방음성능이 크게 저하되는 결과를 초래하게 되었다.However, such a conventional soundproofing panel 100 is stacked up and down between the support pillars 200 and installed, the upper edge cover 140a of the soundproofing panel located on the lower side and the soundproofing located on the upper side. Since the lower edge cover 140b of the panel is propagated to the outside through the abutment portion which is flatly abutted with each other, the sound insulation performance required as the soundproof panel is greatly reduced.
본 고안은 상하로 적층 설치되는 방음판넬들의 대접부위를 통과하는 소음을 효율적으로 차단할 수 있도록 구성하여서, 방음성능을 획기적으로 향상시켜 주는 고품질의 방음판넬을 제공하는 데 목적이 있다.The object of the present invention is to provide a high-quality soundproofing panel that is configured to effectively block the noise passing through the reception portion of the soundproofing panels stacked up and down, to significantly improve the soundproofing performance.
도 1은 종래 방음판넬의 후면 사시도1 is a rear perspective view of a conventional soundproofing panel
도 2는 종래 방음판넬의 일측 단면도Figure 2 is a side cross-sectional view of a conventional soundproof panel
도 3은 종래 방음판넬의 실시상태를 나타낸 단면도3 is a cross-sectional view showing an embodiment of a conventional soundproofing panel
도 4는 본 고안 방음판넬의 후면 사시도4 is a rear perspective view of the present invention soundproof panel
도 5는 본 고안 방음판넬의 일측 단면도5 is a side cross-sectional view of the sound insulation panel of the present invention.
도 6은 본 고안 방음판넬의 실시상태를 나타낸 단면도Figure 6 is a cross-sectional view showing an embodiment of the sound insulation panel of the present invention
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
10: 전면판 11: 나무판재 12: 각목10: front panel 11: wood board 12: lumber
13: 공간부 14: 문양시이트 20: 후면판13: space 14: glyph sheet 20: rear panel
21: 아연도강판 22: 흡음홀 30: 흡음재21: galvanized steel sheet 22: sound absorbing hole 30: sound absorbing material
31: 발포스치로풀판 40a, 40b, 40c. 40d: 테두리커버31: foamed sponge full plate 40a, 40b, 40c. 40d: border cover
41a, 41b: 차음용 단턱 42: 끼움부 43: 경사단부면41a, 41b: Sound insulation step 42: Fitting part 43: Inclined end surface
본 고안도 서로 간격을 두고 마주하는 전면 및 후면판(10)(20)과, 상기 전면 및 후면판(10)(20) 사이에 배치되는 흡음재(30)와, 상기 전면 및 후면판(10)(20) 사방의 테두리를 감싸서 밀봉시켜 주는 테두리커버(40a, 40b, 40c, 40d)들로 구성된 점에 있어서는 종래의 것과 기술개념을 같이 한다.The present invention also faces the front and rear plates 10 and 20 facing each other at intervals, and the sound absorbing material 30 disposed between the front and rear plates 10 and 20, and the front and rear plates 10 (20) In the point consisting of the edge cover (40a, 40b, 40c, 40d) that wraps and seals the rim of the four sides, the same as the conventional concept.
단, 본 고안의 방음판넬(100)은 도 4 및 도 5에 도시되는 바와 같이, 상기 테두리커버(40a, 40b, 40c, 40d)들 중 상부 테두리커버(40a)의 상단과 하부 테두리커버(40b)의 하단에 서로 대칭이 되도록 폭방향으로 단차지는 차음용 단턱 (41a)(41b)를 형성하여서 됨을 기술구성상의 특징으로 한다.However, the soundproof panel 100 of the present invention, as shown in Figures 4 and 5, the upper and lower edge cover 40b of the upper edge cover 40a of the edge cover (40a, 40b, 40c, 40d) It is characterized by the technical configuration that the step of forming the sound insulation step (41a) (41b) stepped in the width direction so as to be symmetrical to each other at the bottom.
이와 같은 본 고안의 방음판넬(100)은 도 6에 도시되는 바와 같이, 전면 및 후면판(10)(20)의 상,하부를 감싸서 밀봉하는 상부측 테두리커버(40a)와 하부측 테두리커버(40b)에 서로 대응하는 차음용 단턱(41a)(41b)들을 가져서, 지지기둥(200)들 사이에 끼워서 상하로 적층되도록 설치되는 방음판넬(100)들이 상호 굴절된 형태로 맞물리게 함으로써, 그 방음판넬(100)들의 대접부위를 통과하는 소음을 확실하게 차단하여 주어서 방음성능을 향상시켜 주는 장점을 가지게 되는 것이다.As shown in FIG. 6, the soundproof panel 100 according to the present invention includes an upper side edge cover 40a and a lower side edge cover that surround and seal the upper and lower portions of the front and rear plates 10 and 20. 40b) has sound insulation steps 41a and 41b corresponding to each other, and the sound insulation panels 100, which are installed to be sandwiched between the support pillars 200 and stacked up and down, are engaged with each other in a refracted form. It will have the advantage of improving the soundproofing performance by reliably blocking the noise passing through the hospitalization portion of the (100).
이하, 첨부도면에 도시되는 구체적인 실시예를 통하여 본 고안의 기술내용을 상세히 설명하면 다음과 같다.Hereinafter, the technical details of the present invention through the specific embodiments shown in the accompanying drawings in detail as follows.
상기 전면판(10)은 소요크기의 평면적을 가지는 나무판재(11)의 내측면 사방의 둘레에 각목(12)들을 고정시켜서 내부에 공간부(13)를 가지도록 형성하여서 된다. 이러한 전면판(10)은 흡음률은 높고 빛반사율이 낮은 나무판재(11) 및 각목 (12)들로 이루어져서, 지지기둥(200)들 사이에 상기 전면판(10)이 외부로 향하도록 방음판넬(100)을 설치한 상태에서, 소음을 흡수하여서 방음기능을 향상시키는 데 도움되게 할 뿐만 아니라, 햇빛 반사에 의한 눈부심을 예방할 수 있게 하여 준다. 이때, 상기 전면판(10)의 공간부(13)는 상기 흡음재(30)를 삽입하여서 내장시킬 수 있게 하는 역할을 감당하게 된다.The front plate 10 is formed to have a space 13 in the interior by fixing the wood 12 around the inner surface of the wood plate 11 having a planar size of the required size. The front plate 10 is made of a wooden board 11 and the wood 12 having a high sound absorption and low light reflectivity, so that the front plate 10 between the support pillars 200 to the outside soundproof panel ( With the 100 installed, it not only helps to improve the sound insulation by absorbing the noise, but also prevents glare caused by sunlight reflection. At this time, the space portion 13 of the front plate 10 has a role to allow the sound-absorbing material 30 to be inserted and embedded.
그리고, 상기 전면판(10)을 이루는 나무판재(11)의 외표면에 문양시이트(14)를 접착 피복시켜서, 방음판넬(100)을 설치할 때에 외부로 향하는 전면판(10)을 미려하게 장식할 수 있도록 한다.Then, by coating the pattern sheet 14 on the outer surface of the wood plate member 11 forming the front plate 10, when the soundproof panel 100 is installed, the front plate 10 facing to the outside can be beautifully decorated. To help.
상기 후면판(20)은 상기 전면판(10)과 상응하는 크기의 평면적을 가지는 아연도강판(21)으로 만들어서 되며, 상기 전면판(10)의 각목(12)에 맞대어지도록 배치하여서 된다.The back plate 20 is made of a galvanized steel plate 21 having a planar area of a size corresponding to the front plate 10, it is to be arranged to face the square 12 of the front plate (10).
그리고, 상기 후면판(20)에는 상기 전면판(10)의 공간부(13)와 연통되도록 배열 형성되는 다수개의 흡음홀(22)들을 가져서, 상기 전면 및 후면판(10)(20) 사이에 위치하도록 상기 전면판(10)의 공간부(13)내에 삽입되는 흡음재(30)를 향하여 소음이 유입될 수 있게 하여 준다.In addition, the rear plate 20 has a plurality of sound absorbing holes 22 which are arranged to communicate with the space 13 of the front plate 10, between the front and rear plates 10, 20 The noise is introduced to the sound absorbing material 30 inserted into the space 13 of the front plate 10 so as to be located.
상기 흡음재(30)는 상기 전면판(10)의 공간부(13) 내에 삽입될 수 있는 정도의 크기를 가지는 발포스치로풀판(31)으로 만들어져서, 상기 전면 및 후면판 (10)(20) 사이에서 상기 후면판(20)의 흡음홀(22)들을 통하여 내부로 유입된 소음을 흡수 제거하여 주도록 한다.The sound absorbing material 30 is made of a foamed sponge full plate 31 having a size that can be inserted into the space 13 of the front plate 10, the front and rear plates 10, 20 It absorbs and removes the noise introduced into the interior through the sound absorbing holes 22 of the rear plate 20 therebetween.
상기 테두리커버(40a, 40b, 40c, 40d)들은 각각 찬넬형의 단면형상으로서 내부에 상기 전면 및 후면판(20)을 수용할 수 있는 끼움부(42)를 가지도록 형성하고, 상기 전면 및 후면판(20) 사방의 테두리를 감싸도록 결착하고 못(A)으로 고정시켜서 밀봉되도록 설치한다. 이 테두리커버(40a, 40b, 40c, 40d)들은 필요에 따라 경질의 합성수지, 금속, 엔지니어링프라스틱으로 만들어질 수 있음을 밝혀 둔다.The edge covers 40a, 40b, 40c, and 40d each have a channel-shaped cross-sectional shape, each having a fitting portion 42 for accommodating the front and rear plates 20 therein, and the front and rear surfaces. Plate 20 is bound to wrap around the four sides and fixed to nail (A) is installed to be sealed. It is noted that these edge covers 40a, 40b, 40c, and 40d can be made of hard synthetic resin, metal, and engineering plastic as needed.
그리고, 상기 테두리커버(40a, 40b, 40c, 40d)들 중 상부 테두리커버(40a)의 상단과 하부 테두리커버(40b)의 하단에 서로 대칭이 되도록 폭방향으로 단차지는 차음용 단턱(41a)(41b)를 형성함이 중요하다. 그 이유는, 지지기둥(200)들 사이에 방음판넬(100)들을 상하로 적층시킬 때에, 하부측 방음판넬(100)의 상부 테두리커버(40a) 상단에 형성된 차음용 단턱(41a)과 상부측 방음판넬(100)의 하부 테두리커버(40b) 하단에 형성된 차음용 단턱(41b)이 굴절되게 맞물려져서, 그 방음판넬 (100)들의 대접부위를 통과하는 소음을 확실하게 차단할 수 있도록 하기 위함이다.Then, the sound insulation step 41a which is stepped in the width direction so as to be symmetrical to each other at the upper end of the upper edge cover 40a and the lower edge cover 40b of the edge cover 40a, 40b, 40c, 40d ( It is important to form 41b). The reason is that when the sound insulation panels 100 are stacked up and down between the support pillars 200, the sound insulation step 41a and the upper side formed on the upper edge cover 40a of the lower sound insulation panel 100 are provided. The sound insulation step 41b formed at the bottom of the lower edge cover 40b of the soundproof panel 100 is interlocked to be refracted, so as to reliably block the noise passing through the reception portion of the soundproof panel 100.
여기에서, 상기 테두리커버(40a, 40b, 40c, 40d)들은 그 각각의 양끝단을 경사지게 절단한 경사단부면(43)을 가져서, 상기 전면 및 후면판(10)(20) 사방의 테두리를 감싸서 밀봉시키도록 설치할 때에, 상기 테두리커버(40a, 40b, 40c, 40d)들 상호간이 경사단부면(43)을 통하여 직각으로 맞댐 고정되도록 함이 바람직하다.Here, the edge cover (40a, 40b, 40c, 40d) has an inclined end surface 43 is inclined cutting the respective ends of each, so as to surround the front and rear plates 10, 20 all around the border When installed to seal, it is preferable that the edge cover (40a, 40b, 40c, 40d) is mutually fixed at right angles through the inclined end surface 43.
이상에서 살펴 본 바와 같이, 본 고안의 방음판넬은 상부측 테두리커버와 하부측 테두리커버에 서로 대응하는 차음용 단턱들을 가져서, 지지기둥들 사이에 끼워서 상하로 적층되도록 설치되는 방음판넬들이 상호 굴절된 형태로 맞물리게 함으로써, 그 방음판넬들의 대접부위를 통과하는 소음을 확실하게 차단하여 주어서 방음성능을 향상시켜 주는 유용한 고안인 것이다.As described above, the sound insulation panel of the present invention has sound insulation steps corresponding to each other on the upper edge cover and the lower edge cover, and the sound insulation panels installed to be stacked up and down between the support pillars are refracted with each other. By engaging in the form, it is a useful design that improves the sound insulation performance by reliably blocking the noise passing through the reception portion of the soundproof panels.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2004-0018208U KR200363692Y1 (en) | 2004-06-28 | 2004-06-28 | Soundproof panel |
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| Application Number | Priority Date | Filing Date | Title |
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| KR20-2004-0018208U KR200363692Y1 (en) | 2004-06-28 | 2004-06-28 | Soundproof panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200456229Y1 (en) | 2008-10-10 | 2011-10-20 | 주식회사 동성진흥 | Natural type sound proof wall assembly with weight reduced |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200456229Y1 (en) | 2008-10-10 | 2011-10-20 | 주식회사 동성진흥 | Natural type sound proof wall assembly with weight reduced |
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