baber/WOPTO huggingface dataset:
Patent KR-20120074961-A (KR)
Title: Display apparatus set
Inventor: CHOI NAM GON
IPC: H04N5/44
Filed: 2010-12-28
Abstract: PURPOSE: A display device set is provided to transmit some of received image signals to another display device. CONSTITUTION: A scaler(140) converts the size and the resolution of an image included in a first image signal. The scaler outputs the converted first image signal. A driving circuit receives the converted first image signal. The driving circuit converts the received first image signal into a first data signal. A display panel(110) receives the first data signal. The display panel displays an image.
Patent KR-20120076957-A (KR)
Title: Foot holder for exercise equipment
Inventor: PARK SUNG SOO
IPC: A63B23/00
Filed: 2010-12-30
Abstract: PURPOSE: A foot fixing device for fitness equipment is provided to enable a user to conveniently adjust the height of a cover. CONSTITUTION: A foot fixing device for fitness equipment comprises a step unit(100), a first connector(200), a second connector(300), and a cover(400). The step unit is combined with both sides of the fitness equipment and forms a position control bar protruded from the front thereof. The first connector is combined with the position control bar and is formed in order to control the front and rear position. The second connector is combined with a height control bar and forms a rotary shaft on both sides thereof.
Patent KR-20120078136-A (KR)
Title: 블록 투수방식과 틈새 투수방식을 혼용한 투수블록의 설치 방법 및 유공관, 유공통을 활용한 투수하부구조의 개선 방안
Inventor: PARK MOON SUK
IPC: E01C11/24
Filed: 2010-12-31
Abstract: 본 발명은 틈새투수방식과 블록자체투수방식을 혼용한 시공방법으로 틈새투수방식 부분 투수하부기층구조는 쇄석층을 일정높이 이상 더 깊게 시공하는 투수블록의 설치방법과 투수하부기층 구조와 시공방법에 관한 것이다. 
투수블록의 설치방법 및 투수하부기층 구조에 관한 것으로 지반침하방지용시트와 유공관 및 유공관을 혼용한 투수하부기층구조에 관한 것이다.
Patent KR-20120078507-A (KR)
Title: Condensing type optical sheet
Inventor: SHIN JIN HO
IPC: G02B5/04
Filed: 2010-12-31
Abstract: PURPOSE: A condensing type optical sheet is provided to widen viewing angle and to prevent the damage of a stereoscopic structure without a protective film. CONSTITUTION: An optical sheet comprises a base material layer and a structural layer. The structural layer is formed at one side of the base material layer. The structural layer comprises a plurality of stereoscopic structures. The plurality of stereoscopic structures of the structural layer is respectively crossed as an angle of 70 to 100degrees. An optical diffusion particle is arranged in a groove formed between stereoscopic structures. The optical diffusion particle is irregularly faulted. The height of a stereoscopic structure is 10 to 25micrometers and the width of the stereoscopic structure is 25 to 110micrometers.
Patent KR-20100085012-A (KR)
Title: Thermography based system and method for detecting counterfeit drugs
Inventor: SINBAR ERAN
IPC: G16H10/60
Filed: 2008-08-07
Abstract: The invention relates to a thermography IR system for determining the authenticity of a pharmaceutical product, the system comprises: (a) a thermography IR apparatus for: (a.1) acquiring at predefined controlled conditions an authenticity signature of an authentic pharmaceutical product, said authenticity signature comprises at least one thermography image of said authentic product, each of said images describes the distribution over said product of the IR radiation in an MWIR or LWIR spectrum as a function of temperature and emissivity; (a.2) storing said acquired authenticity signature in a memory; and (a.3) for a tested pharmaceutical product that corresponds to said authentic product, and whose authenticity is suspected, acquiring at same predefined controlled conditions a test signature, said test signature also comprises at least one thermography image of said tested product, each of said images describes the distribution over said test product of the IR radiation in an MWIR or LWIR spectrum as a function of temperature and emissivity; and (b) a comparison unit for comparing between said authenticity signature and said test signature.
Patent KR-20100034063-A (KR)
Title: System and method for application of an lms method to updating an echo canceller in an adsl modem
Inventor: TKACHOV IGOR
IPC: H04B3/23
Filed: 2001-01-25
Abstract: An echo cancellation device relies on the known characteristics of the sync frame to monitor, update in an off- line fashion and determine the accuracy of an echo canceller in, for example, a modem, such as an ADSL modem. Specifically, time domain samples are read from the transmit (Tx) and receive (Rx) paths of the modem. These samples are stored in memory. When the sync frame has received a predetermined number of the same Tx samples and Rx samples, the samples are stored. Running averages, over the sync frames, of the TX and Rx samples are maintained. These averages are subtracted from a sync frame of samples, to allow LMS updating of the echo canceller taps, free of extraneous signals. Updating, i.e., tracking of changes in the echo channel, is done for the echo canceller in an off-line fashion. The coefficients for the in-line version are updated, while the off-line version is updated over several sync frames. Periodically, the performance of the off-line version is compared with the in-line version. The coefficients of the in- line version are replaced by those of the off- line version only if it is determined the off-line version, which is tracking echo channel changes, has better performance. After replacement of the in-line coefficients, the off-line tracking is continued in the off-line version.
Patent KR-20100063749-A (KR)
Title: Synchronizing related data streams in interconnection networks
Inventor: SCHMIDT BRIAN K
IPC: H04L7/00
Filed: 2008-07-08
Abstract: A method and apparatus for synchronizing related data streams in interconnection networks. Some embodiments of an apparatus include a transmitter to transmit a data stream to a second apparatus, where the transmitter transmits a data packet to the second apparatus. The apparatus further includes a clock, with the apparatus providing a first timestamp for the data packet using the clock upon transmission of the data packet. The apparatus includes a receiver to receive responses from the second apparatus, with the apparatus providing a second timestamp upon receiving a returned packet from the second apparatus, with the returned packet containing timestamps for the receipt and transmission of the packet by the second apparatus. The apparatus includes a network unit to direct the operation of the apparatus, the network unit to determine a start time for decoding of the data stream by the second apparatus based at least in part on the timestamps for the packet.
Patent KR-20100085045-A (KR)
Title: Lithographic apparatus and device manufacturing method
Inventor: VAN DE VIJVER YURI JOHANNES GABRIEEL
IPC: G03F7/20
Filed: 2008-09-17
Abstract: A lithographic apparatus arranged to project a pattern from a patterning device onto a substrate is disclosed. The lithographic apparatus includes an illumination system (IL) and an outlet connected to a pumping system to pump away gas from between an inner wall (64) and outer wall (62) of the illumination system (IL) or, if a radiation source is present, between the inner wall (64) of the illumination system (IL) and an inner wall (62) of the radiation source .
Patent KR-20100085947-A (KR)
Title: Hand-wear article with cutaneous sensory elements
Inventor: COHEN JASON C
IPC: A61F13/10
Filed: 2008-09-26
Abstract: A hand-wear article heightens the neurosensory response of the skin of the wearer. The article includes a substrate having a skin-facing surface and a plurality of cutaneous sensory elements located on the substrate. The sensory elements are configured to have a sharpness frequency in the range of about 100 Hz to about 1,000 Hz and a height in the range of about 0.1 microns to about 1000 microns.
Patent KR-20100074251-A (KR)
Title: Powdery processing aid for polyolefin-based resins, method of producing the same, resin composition and molded article
Inventor: HATAE YOUKO
IPC: C08K5/10
Filed: 2008-11-07
Abstract: A powdery processing aid for polyolefin-based resins which contains an alkyl methacrylate-based polymer comprising an alkyl methacrylate unit, wherein an alkyl group has from 2 to 6 carbon atoms, as the major component and having a mass-average molecular weight of 150,000 to 20,000,000, has good handling properties as a powder, shows a high dispersibility in polyolefin-based resins and improves the molding properties of polyolefin-based resins; and a polyolefin-based resin composition having improved molding properties which comprises the powdery processing aid for polyolefin-based resins and a polyolefin-based resin.
Patent KR-20100106324-A (KR)
Inventor: ZHANG ZUOGUANG
IPC: A61K36/725
Filed: 2007-11-30
Abstract: 본 발명은 종래의 우울증의 부작용을 줄이기 위해, 대추의 cAMP에 의해 제조되는 항우울제를 제공하는 것을 목적으로 한다. 
본 발명은 대추의 cAMP에 의해 항우울제 및 건강식품 및 그 제조방법을 제공한다.
Patent KR-20100093097-A (KR)
Inventor: RIVALTO MICHAEL A
IPC: G06Q10/08
Filed: 2002-09-10
Abstract: 자동 소포 배달 및 픽업용 시스템 및 방법은 스테이션으로부터 소포를 수령 및 분배하도록 배달 및 픽업 스테이션에 위치한 적어도 하나의 소포 포탈을 포함한다. 스테이션 컨트롤러는 정보 입력 시스템과 소포 수령 및 분배 포탈 메카니즘에 커플링되며, 소포와 의도된 수령자 식별 정보와 수취된 소포를 연관시키도록 배치된다. 컨트롤러는 생체 인식 정보를 포함하는 식별 정보를 처리하도록 또한 배치되어 의도된 수령자의 식별을 인증하고 그에 응하여 적어도 하나의 포탈로부터 소포의 분배를 허용한다. 스테이션은 소포의 무인 배달 및 픽업을 지원하여 소포 배달 시스템의 전반적인 효율성 뿐만 아니라 사용자의 편리 및 안전성을 개선시킨다.
Patent KR-20100106586-A (KR)
Inventor: KAWATA MITSUO
IPC: B65D81/24
Filed: 2009-02-06
Abstract: [과제] 투명성, 내충격성, 열 밀봉성, 내블록킹성 및 내열성 등 특성의 전체적인 균형이 우수한 가열 살균 포장용 필름의 제공을 과제로 하고 있다. 
[해결수단] 본 발명의 가열 살균 포장용 필름은, 용융 유량(MFR; ASTM D1238, 230℃, 하중 2.16kg)이 1 내지 10g/10분의 범위에 있고, 시차주사열량계(DSC)로 측정되는 융점이 150 내지 170℃의 범위에 있고, 특정한 요건을 만족하는 실온 n-데케인에 불용인 부분(Dinsol) 90 내지 80중량%와 특정한 요건을 만족하는 실온 n-데케인에 가용인 부분(Dsol) 10 내지 20중량%로 구성되는 프로필렌·에틸렌 블록 공중합체(A)를 포함하는 외층과, 상기 프로필렌·에틸렌 블록 공중합체(A)와 동일하지 않은 프로필렌·에틸렌 블록 공중합체(B)를 포함하는 중간층 또는 외층을 갖는 것을 특징으로 한다.
Patent KR-20100123843-A (KR)
Inventor: HAYASHIZAKI KEIICHI
IPC: C08J5/18
Filed: 2009-02-26
Abstract: 본 발명은 박리력의 박시 시에 박리가 가볍고, 보존 시의 유지력이 우수하고, 또한 내 대기폭로성과 비이행성이 우수한 이형 필름을 제공한다. 
폴리에스테르 필름의 적어도 편면에 경화형 실리콘을 주로 하는 도료를 도공한 이형 필름이고, 상기 도료 중 경화형 실리콘의 비닐기 함유 폴리실옥산 고리에 있어서 비닐기의 함유 비율이 실옥산 단위로 3% 이상이고, 도료 중의 SiH/Vi 비가 2.5∼7인 이형 필름.
Patent KR-20100110379-A (KR)
Inventor: HARRIS REED J
IPC: A61K39/395
Filed: 2009-01-28
Abstract: HER2의 도메인 II에 결합하는 주요 종 HER2 항체 및 그의 산성 변이체를 포함하는 조성물을 기술한다.  또한 상기 조성물을 포함하는 제약 제제, 및 상기 조성물의 치료학적 용도도 개시한다.
Patent KR-20100101708-A (KR)
Inventor: MIZUKAMI YOSHIKATSU
IPC: C09D11/00
Filed: 2009-02-23
Abstract: 본발명은, 적어도 1 종류의 열가소성 중합체로 이루어진 제1의 베이스 중합체(A)와, 적어도 1 종류의 열가소성 중합체로 이루어지고 상기 제1의 베이스 중합체(A)에 혼화성이 없는 제2의 베이스 중합체(B)와, 상기 제1의 베이스 중합체(A) 및 상기 제2의 베이스 중합체(B)의 어느 것에도 혼화성이 없는 동시에 상기 제1의 베이스 중합체(A)의 열분해점과 상기 제2의 베이스 중합체(B)의 열분해점 중, 낮은 쪽의 열분해점에 있어서 액체 또는 슬러리 상태인 적어도 1 종류의 물질을 포함하는 첨가물(C)로 이루어지고,   (A), (B)및 (C)는 각각 상분리되어 있고, 접하고 있는 2상의 계면이 3차원연속 평행 계면을 형성하고 있는, 중합체 조성물이다.
Patent KR-20110006688-A (KR)
Inventor: VERNOOY PAUL DOUGLAS
IPC: H01B3/10
Filed: 2009-04-16
Abstract: 전자 응용에서 후막 저항 페이스트로서 사용하기 위한 비-납 조성물이 개시된다.  본 조성물은 직경이 0.5 내지 5 마이크로미터인 Li 2 RuO 3  입자와 무납 프릿을 함유한다.  이 입자에서는 입자의 표면 또는 주로 그 근처의 리튬이 다른 금속의 원자로 적어도 부분적으로 교환되었다.
Patent KR-20110041441-A (KR)
Inventor: KUBO YOUHEI
IPC: C08G61/10
Filed: 2009-07-17
Abstract: 본 발명은 하기 식(1)으로 나타내어지는 화합물, 및/또는 적어도 1종의 그 화합물을 이용하여 얻어지는 중합체를 포함하는 막 형성용 조성물이고, 뛰어난 내열성을 나타내는 재료로서 유용한 테트라페닐메탄 골격을 복수 갖는 화합물, 상기 화합물을 포함하고, 고내열, 고기계적 강도, 저유전율 등 뛰어난 특성을 나타내는 막을 형성할 수 있는 막 형성용 조성물, 그 막 형성용 조성물을 이용하여 얻어지는 절연막, 및 그 절연막을 갖는 전자 디바이스를 제공하는 것을 목적으로 한다. 
   
[식(1) 중 A는 하기 식(2-1)~식(2-7) 중 어느 하나로 나타내어지는 기, 또는 단결합을 나타낸다. X 1 은 하기 식(3)으로 나타내어지는 기를 나타낸다. n은 2~4까지의 정수를 나타낸다. X 1 은 동일하여도 달라도 된다.]
Patent KR-20120080479-A (KR)
Title: Preparation method of canned kimchi
Inventor: SUH JEONG IHN
IPC: B65D17/34
Filed: 2011-01-07
Abstract: PURPOSE: A producing method of can packaged kimchi is provided to improve the storage quality and functionality of the can packaged kimchi, and to maintain the flavor and taste of the kimchi after storing for a long time. CONSTITUTION: A producing method of can packaged kimchi comprises the following steps: mixing 0.001-1wt% of yeast, lactobacillus, aspergillus oryzae or their mixture with kimchi seasonings; inserting 0.01-5wt% of yeast fermented liquid to the mixture; producing kimchi using the mixture, and aging the kimchi until the pH of the kimchi is 4-6; separating liquid from the kimchi; adding 0.001-3wt% of calcium and 0.01-5wt% of natural extracts into the kimchi liquid, and adjusting the pH of the kimchi liquid into 3-4; mixing the kimchi liquid with kimchi, and filling the mixture in a can before sealing and sterilizing at 60-80 deg C for 10-30 minutes. The natural extracts are selected from a grapefruit seed extract, a scutellaria baicalensis extract, or a chamaecyparis obtusa extract.
Patent KR-20120084391-A (KR)
Title: Control methid using level switch for air-cavity of air-cavity vessel
Inventor: LEE JONG HOON
IPC: F04B49/00
Filed: 2011-01-20
Abstract: PURPOSE: A control method for supplying air according to measured water level of an air chamber of a ship is provided to accurately measure arbitrary heights and to prevent influence according as specific gravity and partial pressure of seawater changes. CONSTITUTION: A control method for supplying air according to measured water level of an air chamber of a ship is as follows. A level switch is installed in an additional space in an air chamber of a ship to measure water level(S10). The measured water level is transmitted to a controller. The controller detects proper water level to determine whether the water level is changed over a reference water level(S20). In case of being changed over the reference water level, the controller operates a compressor so that an air chamber can be filled with air(S30). The controller receives the information on the change of water level through the level switch to determine whether the water level is changed or not(S40). The controller stops the operation of the compressor if the water level is maintained for a constant time(S50).
Patent KR-20120084566-A (KR)
Title: Insert injection molding method optical pickup apparatus
Inventor: LEE DONG YUL
IPC: B29C45/14
Filed: 2011-01-20
Abstract: PURPOSE: An insert injection molding method for an optical pickup actuator is provided to reduce investment costs because a wire can be integrated within a mold without expensive equipment. CONSTITUTION: An insert injection molding method for an optical pickup actuator comprises a wire feeding unit(20) for supplying a wire and an injection mold where a blade and wire holder are processed. A wire is supplied from a wire supplying device to an injection mold. An optical pick up actuator being integrated is molded by inserting an injection resin. A controller for controlling the operation of the wire supplying device is added. A temporary bridge is formed in between the blade and the wire holder and removed after an injection.
Patent KR-20120085438-A (KR)
Title: Voltage and current bias circuit
Inventor: PARK SHI HONG
IPC: G05F3/02
Filed: 2011-01-24
Abstract: PURPOSE: A voltage and current bias circuit is provided to ensure stable operation by creating a voltage and a current with a constant output bias. CONSTITUTION: A transistor Q1 has a source connected to a line voltage terminal. A transistor Q2 has a drain electric current increase different from that of the transistor Q1. A transistor Q3 has a source connected to the drain of the transistor Q1. A transistor Q3 has a drain connected to the gate of the transistor Q1. A transistor Q4 has a source connected to the drain of the transistor Q2 and a gate connected to the gate of the transistor Q3.
Patent KR-20120087582-A (KR)
Title: Solar cell module
Inventor: YU JE MIN
IPC: H01L31/042
Filed: 2011-01-28
Abstract: PURPOSE: A solar cell module is provided to drive a light emitting part without a separate power source by rectifying generated power and using the power. CONSTITUTION: A solar cell generates power by receiving sunlight. A light emitting part(200) outputs light or stops outputting the light by using a part of the power generated from the solar cell. A light emitting control part(250) supplies or blocks the power for outputting the light from the light emitting part. The light emitting control part rectifies the power provided from the solar cell for outputting the light. The light emitting control part includes a power input part and a power output part.
Patent KR-20120091958-A (KR)
Title: Local advertisement system and method for calculating cost for local advertisement
Inventor: MOON JANG WON
IPC: G06Q30/02
Filed: 2011-02-10
Abstract: PURPOSE: A local advertisement system and a method for calculating costs for a local advertisement are provided to enable an advertiser to calculate reasonable costs and to freely set an advertisement region and control reasonably advertisement costs according to a matching degree of an advertisement. CONSTITUTION: Advertisement information about a set advertisement region is received(200). An advertisement sequence number is received(206). An area which is overlapped between an advertisement region of subordinated matching advertisements and the set advertisement region is calculated. An advertisement price is calculates based on the area of the set advertisement region, the subordinated matching advertisements and the area overlapped between the set advertisement regions(208).
Patent KR-20120093502-A (KR)
Title: Obstacle detecting system using of laser, and method thereof
Inventor: CHOI HAE WOON
IPC: B60R21/00
Filed: 2011-02-15
Abstract: PURPOSE: An apparatus and method for detecting an obstacle using a laser are provided to widen a front detection area, and to increase a detection rate in various environments and conditions. CONSTITUTION: An apparatus for detecting an obstacle using a laser comprises a laser source(100), a camera(200), and a image processor(300). The laser source generates laser lights. The camera radiates the laser lights, and films a front image and a laser beam irradiated image. The image processor processes the image filmed by the camera. The image processor subtracts the other image from one of the two images. If the light spot(150) in which the laser beam is reflected from a subject exists in the image, the image processor determines that the obstacle exists.
Patent KR-20120097553-A (KR)
Inventor: KIEL HYUN DUK
IPC: H04W4/12
Filed: 2011-02-25
Abstract: PURPOSE: An electronic name card transmitting system is provided to integrally manage personal contact points through an electronic name card application in a mobile device. CONSTITUTION: A user transmits name card data to a web server of a service provider through a terminal. The web server classifies and stores the name card data. The web server integrates corresponding information through a web application. The web server transmits a single electronic name card file to the mobile device through a wireless network. The user stores the file in a storage space of the mobile device through a mobile application. [Reference numerals] (AA) Terminal of a user; (BB) Web server of a licensee; (CC,MM) Electronic name card file; (DD) Mobile application; (EE) Mobile device of a user(NFC module installed); (FF) Name card template/skin data server; (GG) Name card text data server; (HH) Name card video/picture data server; (II) Name card template/skin data storage space; (JJ) Name card text data storage space; (KK) Name card video/picture data storage space; (LL) Web application
Patent KR-20120097890-A (KR)
Title: Device for removing floating dust
Inventor: CHOI SEUNG KYU
IPC: B08B6/00
Filed: 2011-02-25
Abstract: PURPOSE: A dust removing device is provided to prevent an electric discharge of an electrostatic-induced dust collection film caused by first and second transferring paths including an insulator. CONSTITUTION: A dust removing device comprises a process chamber(10), a dust collection film(30), an electrostatic induction unit(20), and a film transferring unit. Lateral sides of first and second through-passages(12a,12b) of the process chamber are bored in a slit shape. The dust collection film passes through the process chamber through the first and second through-passages. The electrostatic induction unit is arranged adjacently to the first through-passage and induces static electricity to the dust collection film. The film transferring unit transfers the dust collection film from the first through-passage to a direction of the second through-passage.
Patent KR-20120100114-A (KR)
Title: Double-layered vinyl for green house
Inventor: SONG BYUNG EUN
IPC: B29C65/02
Filed: 2011-03-03
Abstract: PURPOSE: A double plastic sheet for a plastic greenhouse is provided to enable users to easily cool and heat the plastic greenhouse, and to economically install the double plastic sheet. CONSTITUTION: A double plastic sheet for a plastic greenhouse includes the following: an upper plastic sheet(11) and a lower plastic sheet(12); and fusing units(15) formed in between the upper and lower plastic sheet with air layers(16), repeatedly installed on the plastic sheets toward the longitudinal direction of the plastic sheets. Both side edges of the double plastic sheet are fused. The upper plastic sheet surface is exposed to the outside. A blowing unit combined to a ventilation pipe is installed in the predetermined position connecting the space in between the upper and lower plastic sheets.
Patent KR-20110120207-A (KR)
Title: Adhesive film for dicing, and manufacturing method of cutting pieces
Inventor: OKUMURA YASUAKI
IPC: C09J7/02
Filed: 2011-03-04
Abstract: PURPOSE: An adhesive film for dicing is provided to ensure high adhesive power and high maintenance power before the film is hardened by radiation and low adhesive property to an object having an active surface. CONSTITUTION: An adhesive film(1) for dicing comprises: a base material(2); and an adhesive layer(3) containing a radiation-curable adhesive composition on the base material. The adhesive composition comprises a (meth)acrylic polymer and a cross-linking agent. The (meth)acrylic polymer is obtained by reacting a base polymer with a radiation reactive compound. The base polymer has an alkyl group-containing (meth)acrylic monomer and a hydroxyl-containing (meth)acrylic monomer. The radiation reactive compound has a first functional group reactive to a hydroxyl group introduced to the base polymer and a radiation reactive carbon-carbon double bond within a molecule.
Patent KR-20120103045-A (KR)
Inventor: LIM DONG HYUN
IPC: H03F3/217
Filed: 2011-03-09
Abstract: 입력된 오디오 신호의 레벨에 따라서 펄스 폭 변조 신호의 논리 하이 레벨이 증가 또는 감소되도록 캐리어 신호의 형태를 변경시키는 제어부, 및 제어부의 제어에 따라서 형태가 변화되는 캐리어 신호를 생성하고, 상기 펄스 폭 변조 신호를 생성하는 펄스 폭 변조부, 및 상기 증폭된 펄스 폭 변조 신호를 생성하는 스위칭 파워부를 포함하여, 빠르게 오디오 신호의 출력 이득을 조절할 수 있는 오디오 신호 출력 방법 및 그에 따른 오디오 신호 출력 장치가 기재되어 있다.
Patent KR-20120105912-A (KR)
Title: Device for stopper of door
Inventor: CHOI JIN SUP
IPC: E05C17/46
Filed: 2011-03-17
Abstract: PURPOSE: A stopper device of a door is provided to prevent the impact noise generated during the collision of a step bolt and a guide hole by making a stopper body with synthetic resin materials. CONSTITUTION: A stopper device of a door comprises a step bolt(10), a stopper body(20), and a reinforcing member(30). The step bolt is coupled with a door frame. The stopper body is installed between a door body(99) and a door frame(98). One side of the stopper body comprises a guide hole(25) and a stopping portion(26) and is coupled with the door body to be rotated. The step bolt is inserted in the guide hole. The stopper body is formed in the guide hole. The stopper body fixes the step bolt when the door body is opened toward the door frame. The strength of the stopper body is reinforced by the insertion of the reinforcing member into the stopper body.