KR19990024285A - Lightweight insulation foam concrete construction method and device - Google Patents
Lightweight insulation foam concrete construction method and device Download PDFInfo
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- KR19990024285A KR19990024285A KR1019980063505A KR19980063505A KR19990024285A KR 19990024285 A KR19990024285 A KR 19990024285A KR 1019980063505 A KR1019980063505 A KR 1019980063505A KR 19980063505 A KR19980063505 A KR 19980063505A KR 19990024285 A KR19990024285 A KR 19990024285A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
본 발명은 경량단열기포 콘크리트 시공방법 및 그 장치에 관한 것으로서, 더욱 상세하게는, 본 발명은 식물성 단백질 또는 동물성 단백질 기포제를 기포화시켜 물, 시멘트, 혼합재를 믹싱하여 일정한 기공에 의하여 부풀어 오른 상태에서 양생시켜 동일한 용접의 일반 콘크리트 보다 아주 가볍게 만들기 위한 경량단열기포 콘크리트 시공방법 및 그 장치를 얻기 위한 것인 바,The present invention relates to a light-insulation foam concrete construction method and apparatus, and more particularly, the present invention is a bubble of vegetable protein or animal protein foaming agent by mixing water, cement, mixed material in a state inflated by a certain pore It is to obtain a light-insulation foam concrete construction method and apparatus for curing and making it much lighter than ordinary concrete of the same welding,
시멘트저장타워와 물과 기포제 및 크랙방지재를 혼합하는 믹싱수단과; 콘크리트 혼합물을 이송시키는 가압펌프와; 단단한 기포군을 형성하며 고른 배합성과 균일 강도를 갖도록 숙성된 기포발생수단과; 경량기포콘크리트를 타설하는 장소로 이송하는 호스와, 콤프레셔를 구성함으로써, 기포군의 배합이 균일하여 강도의 증진과 시멘트가 침전되는 현상이 없으며 기포군의 파괴로 품질의 저하방지 및 시멘트를 절감시킨 효과 있다.Mixing means for mixing the cement storage tower with water, a foaming agent, and a crack preventing material; A pressure pump for conveying the concrete mixture; Bubble generation means for forming a solid bubble group and aged to have a uniform compounding and uniform strength; By constructing a hose and a compressor for transporting lightweight foam concrete to the place where it is placed, it is possible to mix the foam group uniformly so that there is no increase in strength and cement is deposited, and the destruction of the foam group prevents quality deterioration and reduces cement. It works.
Description
본 발명은 경량단열기포 콘크리트 시공방법 및 그 장치에 관한 것으로서, 더욱 상세하게는, 본 발명은 식물성 단백질 또는 동물성 단백질 기포제를 기포화시켜 물, 시멘트, 혼합재를 믹싱하여 일정한 기공에 의하여 부풀어 오른 상태에서 양생시켜 동일한 용접의 일반 콘크리트 보다 아주 가볍게 만들기 위한 경량단열기포 콘크리트 시공방법 및 그 장치에 관한 것이다.The present invention relates to a light-insulation foam concrete construction method and apparatus, and more particularly, the present invention is a bubble of vegetable protein or animal protein foaming agent by mixing water, cement, mixed material in a state inflated by a certain pore The present invention relates to a light-insulating foam concrete construction method and apparatus for curing and making it much lighter than ordinary concrete of the same welding.
현재 아파트의 시공시 내부의 바닥면의 단열과 하중을 경감하기 위한 연구와 투자가 진행중에 있다.Currently, research and investment are underway to reduce the insulation and load of the floor inside the apartment.
종래의 시공방법은 슬래브위에 시멘트 혼합물을 타설하여 시공하거나 단열재를 바닥면에 깔고 시공방법을 사용하였다.In the conventional construction method, the cement mixture is poured on the slab, or the insulation is laid on the floor, and the construction method is used.
그러나, 이러한 종래의 시공방법은 시멘트의 사용량이 많아 시공비가 상승되며 현재 고층빌딩의 증가로 건축재의 무게를 경감시키는 현 시점에서 하중의 증가 되는 문제점이 있었다.However, this conventional construction method has a problem that the load is increased at the present time to reduce the weight of the building material due to the increase in the high-rise building, the construction cost is increased due to the large amount of cement used.
또한, 에너지 절약차원에서 따로 단열재를 삽설 시공하는 부가적인 작업공정이 필요하여 인건비의 증가와 자재비의 증가로 인한 시공비가 증가되는 문제점이 있었다.In addition, in order to save energy, there is a problem in that an additional work process for inserting and installing a heat insulating material is required, resulting in an increase in construction cost due to an increase in labor costs and material costs.
따라서, 본 발명은 상기 종래의 문제점을 감안하여 안출한 것으로서, 본 발명의 목적은, 식물성 단백질 또는 동물성 단백질 기포제를 기포화시켜 물, 시멘트, 혼합재를 믹싱하여 일정한 기공에 의하여 부풀어 오른 상태에서 양생시켜 동일한 용접의 일반 콘크리트 보다 아주 가볍게 만들기 위한 경량단열기포 콘크리트 시공방법 및 그 장치를 제공하는 데 있다.Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to bubble a vegetable protein or an animal protein foaming agent, mix water, cement, and a mixture to cure in a state in which it is swollen by constant pores. It is to provide a light-insulating foam concrete construction method and apparatus for making it much lighter than ordinary concrete of the same welding.
본 발명의 또 다른 목적은 건축시공시 가장 중요한 것은 시공상의 편리성과 시공시의 시공비가 적은 경량단열기포 콘크리트 시공방법 및 그 장치 제공하는 데 있다.Still another object of the present invention is to provide a lightweight insulating foam concrete construction method and apparatus having a low construction cost and convenience in construction.
이와 같은 목적을 달성하기 위한 본 발명의 경량단열기포 콘크리트 시공방법 및 그 장치는 시멘트저장탱크와 물과 기포제 및 크랙방지재를 혼합하는 믹싱수단과; 콘크리트 혼합물을 이송시키는 가압펌프와; 단단한 기포군을 형성하며 고른 배합성과 균일 강도를 갖도록 숙성된 기포발생수단과; 경량기포콘크리트를 타설하는 장소로 이송하는 호스로 이루어진 특징이 있다.Lightweight insulation foam concrete construction method and apparatus of the present invention for achieving the above object comprises a mixing means for mixing the cement storage tank and water, foaming agent and crack prevention material; A pressure pump for conveying the concrete mixture; Bubble generation means for forming a solid bubble group and aged to have a uniform compounding and uniform strength; It is characterized by a hose that transfers to the place where the lightweight foam concrete is poured.
도 1은 본 발명의 실시예의 경량단열기포콘크리트 시공방법 및 그 장치를 도시한 구성도,1 is a configuration diagram showing a lightweight insulating foam concrete construction method and apparatus thereof according to an embodiment of the present invention,
도 2는 도 1의 A는 부분인 본 발명의 경량단열기포콘크리트 장치의 기포발생장치를 도시한 단면도,2 is a cross-sectional view showing the bubble generating device of the lightweight insulating foam concrete device of the present invention A is a portion of FIG.
도 3는 본 발명의 다른 실시예의 경량단열기포콘크리트 장치의 기포발생장치를 도시한 단면도이다.3 is a cross-sectional view showing a bubble generating device of a lightweight insulating foam concrete device of another embodiment of the present invention.
도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of drawings
10 : 시멘트저장탱크 20 : 물탱크10: cement storage tank 20: water tank
30 : 기포제 저장탱크 40 : 크랙방지제 탱크30: foam storage tank 40: crack inhibitor tank
50 : 믹싱 60 : 가압펌프50: Mixing 60: Pressurized Pump
70 : 호스 80 : 콤프레셔70: hose 80: compressor
90 : 이송수단부 100 : 기포발생수단부90: transfer means 100: bubble generation means
이하, 첨부된 도면들을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 실시예의 경량단열기포콘크리트 시공방법 및 그 장치를 도시한 구성도이고, 도 2는 본 발명의 경량단열기포콘크리트 장치의 기포발생장치를 도시한 단면도이고, 도 3은 본 발명의 다른 실시예의 경량단열기포콘크리트 장치의 기포발생장치를 도시한 단면도이다.1 is a configuration diagram showing a light-insulating foam concrete construction method and apparatus thereof according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a bubble generating device of the lightweight insulating foam concrete device of the present invention, Figure 3 is a present invention Another embodiment of the cross-sectional view showing the bubble generator of the lightweight insulating foam concrete device.
도 1 내지 도 2에 도시된 바와 같이, 본 발명의 경량단열기포 콘크리트 시공방법 및 그 장치는 시멘트저장탱크(10)와 물탱크(20)과 기포제저장 탱크(30) 및 크랙방재탱크(40)로부터 공급하여 혼합하는 믹싱수단부(50)와; 콘크리트 혼합물을 이송시키는 가압펌프(60)와; 단단한 기포군을 형성하며 고른 배합성과 균일 강도를 갖도록 숙성된 기포발생수단부(100)과; 경량기포콘크리트를 타설하는 장소로 이송하는 호스(70)와, 콤프레셔(80)를 포함하여 구성된다.As shown in Figures 1 and 2, the lightweight insulating foam concrete construction method and apparatus of the present invention is a cement storage tank 10, the water tank 20, the bubble storage tank 30 and the crack disaster prevention tank 40 A mixing means unit 50 supplied from the mixing unit; A pressure pump 60 for conveying the concrete mixture; Bubble generation means 100 is formed to form a solid bubble group and to have a uniform compounding and uniform strength; It comprises a hose 70 and a compressor 80 for transferring to the place where the lightweight foam concrete is to be placed.
먼저, 본 발명의 경량단열기포 콘크리트 시공방법은 시멘트저장탱크(10)에 시멘트와, 물탱크(20)에서 공급되는 물과, 기포저장탱크(30)에 기포제가 혼합된 기포제와, 크랙저장탱에서 크랙을 방지하는 크랙방지제를 이송수단(90)을 갖는 이송하는 단계와; 상기 이송된 혼합물을 골고루 혼합하는 믹싱기(90)가 장착되어 혼합하는 믹싱단계와; 상기 믹싱된 혼합물을 가압 펌프(60)가 장착되어 가압하는 가압펌핑단계와; 상기 펌핑된 혼합물이 원통의 강관의 본체부와, 비금속의 재질의 얇은 띠로 형성된 철수세미 및 철스프링 조각으로 채워진 입구부와, 다양한 모양을 갖는 다수의 애자 넣은 중간부와, 비금속의 재질의 얇은 띠로 형성된 철수세미로 채워진 출구부를 갖는 기포발생장치부(100)를 거치는 기포발생단계와; 이송시키는 이송수단으로 이루어져 믹싱된 혼합콘크리트를 가압펌프(60)로 가압하여 기포발생부를 순차적으로 통과시켜 단단한 기포군의 형성과 기포군이 균일하게 분포시켜 강도를 증진시킨 경량의 기포콘크리트를 형성하도록 이루어진다.First, the lightweight insulating foam concrete construction method of the present invention is a cement and the storage tank 10, the water supplied from the water tank 20, the foaming agent mixed with the foaming agent in the bubble storage tank 30, crack storage tank Transporting the crack preventing agent to prevent cracking in the transfer means (90); A mixing step in which a mixer 90 for mixing the transferred mixture evenly is mounted and mixed; A pressure pumping step of pressurizing the mixed mixture with a pressure pump (60); The pumped mixture comprises a main body portion of a cylindrical steel pipe, an inlet portion filled with a pulley and iron spring pieces formed of a thin strip of non-metal material, a plurality of insulated intermediate portions having various shapes, and a thin strip of non-metal material. A bubble generating step of passing through the bubble generating device unit 100 having an outlet portion filled with a pulled out semi-conductor; Composed of a conveying means for conveying mixed mixed concrete by pressurizing pump 60 to sequentially pass through the bubble generating portion to form a rigid bubble group and evenly distributed bubble group to form a lightweight foam concrete to enhance the strength Is done.
다음 본 발명의 경량단열기포 콘크리트 장치는 시멘트와 물과 기포제 및 크랙방지재를 혼합하는 믹싱수단부(50)와; 콘크리트 혼합물을 이송시키는 가압펌프(60)와; 단단한 기포군을 형성하며 고른 배합성과 균일 강도를 갖도록 숙성된 기포발생수단(100)과; 경량기포콘크리트를 타설하는 장소로 이송하는 호스(70)와, 콤프레셔(80)를 포함하여 구성된다Next, the lightweight insulating foam concrete apparatus of the present invention includes a mixing means unit 50 for mixing cement, water, foaming agent, and crack preventing material; A pressure pump 60 for conveying the concrete mixture; Bubble generation means (100) is formed to form a rigid bubble group and to have an even blendability and uniform strength; It comprises a hose (70) and a compressor (80) for transporting to the place where the lightweight foam concrete is to be placed
상기 믹싱수단부(50)은 시멘트 저장타워(10)와, 물탱크(20)와, 기포제저장탱크(30)와, 크랙방지제를 이송하여 혼합물을 믹싱하는 콘크리트 믹싱장치가 설치된다.The mixing means unit 50 is a cement mixing tower 10, the water tank 20, the foam storage tank 30, and a concrete mixing device for mixing the mixture by transferring the crack inhibitor.
상기 가압펌프(60)는 믹싱장치에서 믹싱된 혼합 콘크리트를 고압으로 가압하여 기포장치(100)를 구동하도록 별도의 동력원이 모터가 V밸트로 연결하여 펌프(60)를 구동시킨다.The pressurized pump 60 drives a pump 60 by connecting a separate power source to a V-belt so as to drive the foaming apparatus 100 by pressurizing the mixed concrete mixed in the mixing apparatus at a high pressure.
상기 기포발생수단부(100)은 원통의 강관의 본체부(110)와, 비금속의 재질의 얇은 띠로 형성된 철수세미 및 철스프링 조각으로 채워진 입구부(120)와, 다양한 모양을 갖는 다수의 애자 넣은 중간부(130)와, 비금속의 재질의 얇은 띠로 형성된 철수세미로 채워진 출구부(140)로 구성된다.The bubble generating means portion 100 is the body portion 110 of the cylindrical steel pipe, the inlet portion 120 is filled with a pulley and iron spring pieces formed of a thin strip of non-metal material, and a plurality of insulators having various shapes The intermediate portion 130, and the exit portion 140 is filled with a pulley formed of a thin strip of non-metal material.
상기 이송호스(70)는 가압펌프(60)에서 가압되어 기포발생수단을 거처 시공장소까지 경량의 기포콘크리트를 압송하는 호스가 연결되어져 있다.The transfer hose 70 is pressurized by the pressure pump 60 is connected to the hose for transporting lightweight foam concrete to the city factory through the bubble generating means.
이와 같이 구성된 본 발명의 경량단열기포 콘크리트 장치의 작용을 상세히 설명한다.The operation of the lightweight insulating foam concrete device of the present invention configured as described above will be described in detail.
시멘트저장타워(10)와, 물탱크(20)와, 기포제저장탱크(30)와, 크랙방지제를 이송하여 혼합물을 믹싱하는 콘크리트 믹싱장치에 이송하여 믹싱된 혼합콘크리트를 가압펌프에 의해 시멘트저장탱크에 시멘트와, 물탱크에서 공급되는 물과, 기포제가 혼합된 기포제와, 크랙을 방지하는 크랙방지재를 믹싱장치에 이송하여 이송된 혼합물을 골고루 혼합하는 믹싱하여 상기 믹싱된 혼합물을 가압하는 가압펌핑된다. 이때 상기 가압펌핑된 혼합물이 원통의 강관의 본체부(110)와, 비금속의 재질의 얇은 띠로 형성된 철수세미 및 철스프링 조각으로 채워진 입구부(120)와, 다양한 모양을 갖는 다수의 애자 넣은 중간부(130)와, 비금속의 재질의 얇은 띠로 형성된 철수세미로 채워진 출구부를 거치는 동안 단단한 기포군의 형성과 기포군이 균일하게 분포시켜 강도를 증진시킨 경량의 기포콘크리트 형성되어 시공장소로 이송시키는 이송호스가 연결되어 있다.The cement storage tank (10), the water tank (20), the foam storage tank (30), and the crack prevention agent are transferred to a concrete mixing device for mixing the mixture, and the mixed concrete mixed by the pressure pump is stored in the cement storage tank. Pressurized pump to pressurize the mixed mixture by mixing the cement, the water supplied from the water tank, the foaming agent mixed with the foaming agent, and the crack preventing material to prevent cracking to the mixing device to evenly mix the conveyed mixture. do. At this time, the pressure-pumped mixture is the body portion 110 of the cylindrical steel pipe, the inlet portion 120 is filled with a pulley and iron spring pieces formed of a thin strip of non-metal material, and the middle portion containing a plurality of insulators having various shapes 130, and a transfer hose for forming a rigid foam group and a uniform distribution of foam groups while uniformly distributed through the exit portion filled with a pulley formed of a thin band of non-metal material to form a lightweight foam concrete to transfer to the city factory Is connected.
본 발명의 다른 실시예의 경량단열기포 콘크리트 장치의 기포발생수단은 원통의 강관의 본체부(110)와, 비금속의 재질의 얇은 띠로 형성된 철수세미 및 철스프링 조각으로 채워진 입구부(120)와, 다양한 모양을 갖는 다수의 애자 넣은 중간부(130)와, 비금속의 재질의 얇은 띠로 형성된 철수세미가 삽입된 중간부(130′)와, 다수의 애자가 삽입된 출구부(140)로 형성되져 다단계를 갖도록 구성된다.Bubble generation means of the lightweight insulating foam concrete device of another embodiment of the present invention is the body portion 110 of the cylindrical steel pipe, the inlet portion 120 is filled with a pulley and iron spring pieces formed of a thin strip of non-metal material, and various The intermediate part 130 having a plurality of insulators, a middle part 130 'into which a pulley scrubber formed of a thin band of non-metal material is inserted, and an outlet part 140 into which a plurality of insulators are inserted are formed. It is configured to have.
예컨대, 본 발명은 상술한 실시예에 한정되지 아니하며, 청구범위에서 청구한 본 발명의 요지를 벗어남이 없이 본 발명이 속하는 기술분야에 통상의 지식을 가진 자라면 다양한 변형 실시가 가능한 것임은 물론이고, 그와 같은 변경은 본 발명의 청구범위내에 있게 된다.For example, the present invention is not limited to the above-described embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Such changes are intended to fall within the scope of the present invention.
본 발명은 상기 실시예를 통하여 설명한 바와 같이, 본 발명의 경량단열기포콘크리트 시공방법 및 그 장치은 종전의 시공시의 많은 문제점을 해결하여 가볍고 단열성이 뛰어나며 특히 경량기포콘크리트내에 단단한 기포군을 형성하 품질이 향상시킨 효과가 있다. 또한, 기포군의 배합이 균일하여 강도의 증진과 시멘트가 침전되는 현상이 없으며 기포군의 파괴로 품질의 저하방지 및 시멘트를 절감시킨 효과가 있으므로 건설산업상 매우 유용한 발명인 것이다.The present invention, as described through the above embodiments, the lightweight insulating foam concrete construction method and apparatus of the present invention solves many problems in the previous construction, light and excellent thermal insulation, in particular to form a solid bubble group in the lightweight foam concrete This has an improved effect. In addition, since the mixing of the bubble group is uniform, there is no phenomenon of increasing the strength and precipitation of cement and preventing the degradation of the quality by reducing the bubble group and reducing the cement, which is a very useful invention for the construction industry.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980063505A KR100336526B1 (en) | 1998-12-31 | 1998-12-31 | Method and apparatus for producing lightweight insulated aerated concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019980063505A KR100336526B1 (en) | 1998-12-31 | 1998-12-31 | Method and apparatus for producing lightweight insulated aerated concrete |
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| KR19990024285A true KR19990024285A (en) | 1999-03-25 |
| KR100336526B1 KR100336526B1 (en) | 2002-11-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030061983A (en) * | 2002-01-14 | 2003-07-23 | 대신콘크리트 주식회사 | Lightweight bubble artificial stone using foam and its manufacturing method |
| KR100498842B1 (en) * | 2002-07-22 | 2005-07-04 | 한국건설기술연구원 | Manufacturing apparatus for air-entrained concrete slurry having foaming machine |
| KR101876152B1 (en) * | 2017-12-27 | 2018-07-06 | 김창구 | Facilities for depositing lightweight aerated concrete and foam regeneration device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101583001B1 (en) * | 2013-12-10 | 2016-01-06 | 강원대학교산학협력단 | Using a high-performance two-layer concrete pavement concrete apparatus and method |
| US10000896B2 (en) | 2013-12-10 | 2018-06-19 | Kangwon National University University-Industry Cooperation Foundation | Two-layer concrete pavement forming device and pavement method using normal concrete and high-performance concrete |
-
1998
- 1998-12-31 KR KR1019980063505A patent/KR100336526B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030061983A (en) * | 2002-01-14 | 2003-07-23 | 대신콘크리트 주식회사 | Lightweight bubble artificial stone using foam and its manufacturing method |
| KR100498842B1 (en) * | 2002-07-22 | 2005-07-04 | 한국건설기술연구원 | Manufacturing apparatus for air-entrained concrete slurry having foaming machine |
| KR101876152B1 (en) * | 2017-12-27 | 2018-07-06 | 김창구 | Facilities for depositing lightweight aerated concrete and foam regeneration device |
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| KR100336526B1 (en) | 2002-11-23 |
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