baber/WOPTO huggingface dataset:
Patent KR-20010013474-A (KR)
Title: 외과용 스텐트 폴리싱 방법 및 장치
IPC: B24C3/32
Filed: 1998-06-05
Abstract: 유체 연마 매체(M)가 스텐트(10)의 표면 위를 흘러 스텐트(10)의 표면이 폴리싱되고 유선형화 되게하는 반경방향 팽창성 외과용 스텐트를 폴리싱하는 방법이 개시되어 있다. 상기 스텐트(10)엔, 일시적으로 원통형 지지 단부(20)가 구비되며, 원통형 지지 단부(20)는 폴리싱 공정 동안에 반경방향으로 팽창되지 않고 스텐트(10)를 지지한다. 스텐트(10)를 수용하기 위하여 내부에 적용된 원통형 챔버(135)를 가지는 내부 폴리싱 고정물(100)이 구비된다. 유체 연마 매체(M)는 원통형 챔버(135)에 이르는 고정물(100)내의 보어(108)내로 흘러들고 스텐트(10)의 내경면에 접한다. 외경을 형성하는 스텐트(10)의 표면은 원통형 리세스(220)를 가지는 외부 폴리싱 고정물(200)내에 스텐트(10)를 위치시킴으로서 폴리싱된다. 상기 원통형 리세스(220)는 스텐트(10)의 외면의 직경보다 큰 직경을 가지고, 스텐트(10)가 위치된 원통형 리세스(220)를  축방향으로 통과하는 원통형 축(270)을 포함한다. 경사진 보어(208)는 외부 폴리싱 고정물(200)의 벽을 관통하고 원통형 리세스(220)로 이어지며, 스텐트(10)의 외면에 인접하게 연마 매체(M)을 유도하고 스텐트(10)의 외면을 폴리싱한다. 상기 연마 매체(M)의 방향은 스텐트(10) 조각의 유선형화가 대칭적으로 발생하도록 역전될 수 있다. 상기 스텐트(10)의 폴리싱이 왼성된 후에, 상기 원통형 지지 단부(20)는 제거되고 스텐트(10)는 체내 관강내에 이식 및 반경방향 팽창을  위해 준비된다. 폴리싱되고 유선형화되면, 상기 반경방향 팽창성 외과용 스텐트(10)는 과도한 혈전, 협착 및 다른 의학적 합병증 없이 체내 관강(L)을 효과적으로 지지한다.
Patent KR-20010013800-A (KR)
Title: 변속시 저킹(요동)을 저감하는 방법
IPC: F16H61/04
Filed: 1998-06-12
Abstract: 본 발명은 자동변속기에서 변속중에 요동을 감소시켜주기 위한 방법에 관한 것이다.   본 자동변속기는 주차위치(P)와 중립위치(N)에 추가로 전진구동(D)과 후진(R) 조작을 하는 슬렉터레버(22)를 가지고 있다.   제 1 클러치는 위치 R,N 및 D(1단)에서 닫혀 있다.   위치 D로부터 이동하여 N으로 전환하면 제 2 클러치가 열리거나 또는 위치 R로부터 이동 N으로 전환함으로서 제 3 클러치가 열린다.   발명에 의한 방법에서 제 1 클러치(k1)의 압력레벨은 변속조건이 충족될때 제 1(P1) 압력레벨로부터 제 2 압력레벨로 감소되도록 되어 있다.   제 1 클러치(k1)는 슬렉터 레버에서 D/N 또는 R/N이 인식되면 일정한 시간동안 열려 있다.
Patent KR-20000024256-A (KR)
Inventor: LEE CHAN YOUNG
Filed: 2000-02-01
Abstract: PURPOSE: An electronic trade method having a portal site function is provided to integrate an internet shopping mall with a portal site in order customers to do internet shopping and obtain information relative to their interesting products or services. CONSTITUTION: In the electronic trade method having an internet portal site system integrated with a shopping mall function, an electronic trade system includes a database server, a product search system for searching products or services, an automatic estimate system for estimating ordered products, an automatic order system, a products prices payment system, and an after-service management system. Sellers register products for sale and customers search and select products to buy. Once receiving an order(1), the electronic system verifies the customer(2). Consequently, the electronic trade system automatically estimates the ordered products and transfers an electronic estimation paper to the customer for confirmation(3). If the estimation paper is accepted, the seller delivers ordered products and registers the customer as a member.
Patent KR-20010078557-A (KR)
Title: 2d/3d wed browsing system
Inventor: KIM JONG MIN
IPC: G06F17/30
Filed: 2000-02-09
Abstract: PURPOSE: The web browsing system is provided to freely search the information between two and three-dimension each other, to offer a web browser which can handle the information of two/three-dimension in the searchable unit, to display the two-dimensional information in the maximum size as well as navigate the three-dimensional virtual space, and to serve the method. CONSTITUTION: A browser common control engine(701) notifies the user input information to a web server and instructs two/three-dimension browser engines(702,703) to display the data according to the user input. The two-dimension engine checks the two-dimension information by comparing the two-dimension data of a two-dimension communication unit(707) with the two-dimension information cash(712) of a DB, analyses the two-dimension data, and offers the data to two-dimension information display processor(709). The three-dimension engine checks the three-dimension information by comparing the three-dimension data of a three-dimension communication unit(708) with the three-dimension information cash(711) of a DB, analyses the three-dimension data, and offers the data to three-dimension information display processor(710). A two/three-dimension data exchange processor(704) has the function of tunneling between two and three-dimension information. A two/three-dimension converter processor(705) converts the two-dimension data format into the three-dimension data and supplies to the three-dimension browser engine, in addition, converts the three-dimension data format into the two-dimension data and supplies to the two-dimension browser engine. A communication kernel(706) distributes two/three-dimension information to two/three-dimension communication unit respectively. The two-dimension communication unit converts the network data of two-dimension information into HTTP(Hyper Text Transfer Protocol) and supplies to the browser common control engine. The three-dimension communication unit converts the network data of three-dimension information into HTTP(Hyper Text Transfer Protocol) and supplies to the browser common control engine. The two-dimension information display processor creates and offers a two-dimension image to a displayer. The three-dimension information display processor creates and offers a three-dimension image to a displayer. A plug-in controller(718) installs or removes a plug-in program which shows the different data unsupported by the browser.
Patent KR-20010082908-A (KR)
Title: Motor driving control device
Inventor: MUN YONG GI
IPC: H02P21/00
Filed: 2000-02-22
Abstract: PURPOSE: A motor drive controller is provided to stably adjust the gain by compensating the delay of the feedback current caused by motor current control period and by compensating the voltage fluctuating at the input power terminal. CONSTITUTION: The motor drive controller comprises a pair of proportion-integral(PI) controllers(101,103), a pair of gain controllers(102,104), a pair of current compensators(120,130), a voltage fluctuating compensator(110), and a multiplexor(105). The PI controllers produce proportioned and integrated voltage values, which are obtained by adding the compensating current value generated from the current compensator for u-phase coil current of the motor and the compensating current value generated from the current compensator for v-phase coil current of the motor. Each gain controller adjusts the gain according to the output of the voltage fluctuating compensator and applies the gain adjusted voltage to the multiplexor. The voltage fluctuating compensator has a power detection unit, a polar determination unit, a reverse current detection unit, a voltage raise deviation calculation unit, and a voltage raise deviation add unit. The multiplexor converts the voltage values generated from the gain controllers into the three-phase voltage reference values according to the rotational signal produced from the rotational angle sensor and applies them to the PWM signal generator.
Patent KR-20010084846-A (KR)
Inventor: KIM JIN UK
IPC: G05F3/26
Filed: 2000-02-29
Abstract: PURPOSE: A current trimming device is provided, which controls a variable range of a reference current for mirroring more widely and adjusts a current level more minutely. CONSTITUTION: The current trimming device is constituted by adding a reference current variable adjustment part(23) to control a variable range of a current used as a reference current for mirroring more minutely to the prior structure. The reference current variable adjustment part comprises the first transistor(Q1) and the second transistor(Q2) of a current mirror type connected to a power supply voltage terminal(Vdd), resistors(Ra,Rb) serially connected between the second transistor and a ground voltage terminal(Vss), the first bonding pad(23a) connected between the resistor(Ra) and the resistor(Rb), and the second bonding pad(23b) connected between the second transistor and the resistor(Ra) through a resistor(R3). The current trimming part comprises a plurality of resistors(R1-Rn), a plurality of zener diodes(Z1-Zn) and a plurality of trimming pads(Tpad1-Tpadn).
Patent KR-20000030478-A (KR)
Inventor: PARK JOO IN
IPC: A41C3/00
Filed: 2000-03-02
Abstract: PURPOSE: A brassiere cup and a producing method and a brassiere thereof are provided to form protrusions such as embossing on the inner side of the brassiere cup for ventilating easily, for preventing the brassiere from sliding up and for promoting circulation of blood. CONSTITUTION: Plural protrusions(21) are formed on the inner side of a brassiere cup such as embossing for pressing breasts while being worn by a woman. Herein, the protrusions are formed for the entire surface of the inner side or for a certain part of the inner side. Moreover, the protrusions are arranged regularly for enhancing ventilation effect. The arrangement of the protrusions forms a cone shape for reducing the number of protrusions at the central part, forms a slant line or forms a straight line and a diagonal line.
Patent KR-20000062862-A (KR)
Title: 짧은 채널 길이 및 가변 차단 전압을 가진 전계 효과트랜지스터를 포함하는 판독 증폭기
IPC: H03F3/16
Filed: 2000-03-14
Abstract: 본 발명은 짧은 채널 길이(L Design )를 가진 전계 효과 트랜지스터를 포함하는 판독 증폭기에 관한 것이다.  전계 효과 트랜지스터는 절연된 웰(9)내에 배치되며, 상기 웰의 전위가 제어됨으로써, 기판 제어 효과에 의해 차단 전압의 편차가 보상될 수 있다.
Patent KR-20010093496-A (KR)
Title: Device for distributing the pressure of the vehicle seat belt
Inventor: LEE DONG HYEON
IPC: B60R22/28
Filed: 2000-03-29
Abstract: PURPOSE: A seat belt pressure dispersing device is provided to protect a passenger from being injured by swelling a webbing between a seat belt and the passenger as an air cushion at a collision. CONSTITUTION: A seat belt is composed of a webbing(1), a retractor(2), a mini anchor(3), a tongue plate(4) and a buckle(5). The cylindrical webbing is drawn out from the retractor, and an air bag is mounted in the webbing. A control unit(8) transmits a signal to an air bag system(10) corresponding to an output signal of a collision detecting sensor(9). A gas generator(7) is installed at a side of a vehicle body, and contacted to air through an output terminal and a wire harness. A gas outlet(71) of the gas generator is inserted to the air bag of the webbing. The webbing is swollen with deploying the air bag at a collision, and the shock is reduced with eliminating pressure between the webbing and the passenger. The passenger is protected and prevented from being injured with swelling the webbing at the collision.
Patent KR-20010083022-A (KR)
Title: An underwater childbirth apparatus
Inventor: YANG WON DONG
IPC: A61H33/04
Filed: 2000-03-30
Abstract: PURPOSE: Provided is an underwater delivery system which includes a delivery bath and a supply member for purified water to perform delivery in underwater stably so that it provides an optimal environment for women to deliver a child. CONSTITUTION: The underwater delivery system comprises the parts of: a delivery bath(10) which stores purified water to deliver a child in underwater and cares women; and a purified part(40) which is placed between the delivery bath and a supply part for purified water(38) to supply purified water for purifying water supplied for the supply part and then supply the purified water for the delivery bath.
Patent KR-20010006942-A (KR)
Inventor: BEIGI HOMAYOON SADR MOHAMMED
IPC: G10L17/02
Filed: 2000-03-31
Abstract: PURPOSE: Voice information is retrieved according to voice contents and speaker discrimination by discriminating voice information matching a user inquiry by comparing the user inquiry with the contents index and speaker index of a voice source. CONSTITUTION: The user inquiry includes a text character string including one or more key words and given speaker discrimination. The restriction conditions of the inquiry are compared with an indexed voice or/and a video database to retrieve proper voice and video segments. A voice retrieval system (100) comprises an indexing system (500) which transcribes and indexes voice information and an voice retrieval system (600). The indexing system (500) processes a text outputted from a voice recognition system in the indexing stage to perform contents indexing and speaker indexing. In the retrieval stage, the contents and speaker voice retrieval system (600) matches an inquiry document according to the voice contents and speaker discrimination by using the contents indexes and speaker indexes in the indexing stage and returns a proper document to a user.
Patent KR-20010094161-A (KR)
Title: 2,2-Dimethyl-4,5-diaryl- 3(2H)furanone derivatives and selective cyclooxygenase-2 inhibitors and a pharmaceutical composition thereof
Inventor: BYUN YEONG JU
IPC: C07D307/00
Filed: 2000-04-04
Abstract: PURPOSE: The 2,2-dimethyl- 4,5-diaryl-3(2H) furanone derivatives and a pharmaceutical composition comprising the same, and used as a selective cyclooxygenase-2 inhibitor are provided, therefore, the compounds have high selectivity for cyclooxygenase-2(COX-2) and selectively inhibits the prostaglandin biosynthesis of COX-2, to effectively treat diseases associated with COX-2. CONSTITUTION: The 2,2-dimethyl- 4,5-diaryl-3(2H) furanone derivatives are represented by formula(I), in which R1 and R2 are the same or different, and hydrogen, halogen or low alkyl; X is S(O)nR3, wherein n is 0, 1, or 2 and R3 is hydrogen, low alkyl, amino, low alkylamino, alkylcarbonylamino or halogen; Y is at least one or two of the same or different, and hydrogen, halogen, nitro, amino, acetamino, alkoxy or haloalkyl; and Z is O or S. The pharmaceutical composition useful as a selective cyclooxygenase-2 inhibitor comprises an effective amount of the 2,2-dimethyl- 4,5-diaryl-3(2H) furanone derivatives of formula(I).
Patent KR-20010006968-A (KR)
Inventor: ISHIBASHI YOSHIHITO
IPC: G06F17/30
Filed: 2000-04-07
Abstract: PURPOSE: A security unit is provided to prevent unauthorized retrieval of data stored to a memory or a data processing unit. CONSTITUTION: A security unit(52) includes an encrypting unit(54) for encrypting data in accordance with commands received by the security unit(52) and a common register(53) for storing both intermediate results and final results of the data encryption. A switching element(60) operatively coupled to the register(53) selectively outputs the contents of the register. Also, the switching element(60) is controlled to prevent external access to the intermediate results of the encryption. The security unit(52) is particularly useful as part of a memory unit(40) that is attachable to a recording/reproduction device such as a digital audio recorder/player.
Patent KR-20010096045-A (KR)
Title: fence of wafer lifter assembly for ionimplanter
Inventor: JUNG SEONG HWAN
IPC: H01L21/265
Filed: 2000-04-17
Abstract: PURPOSE: A fence of a wafer lift assembly for ion implantation apparatus is provided to prevent a damage of a wafer by forming a coating layer on a surface of a main body of a fence to restrain abrasion and deformation due to contact with a wafer. CONSTITUTION: A main body(71) is formed with an aluminium with low hardness. A coating layer(73) is formed to enhance surface hardness of the main body(71). A passing hole is formed on a predetermined portion of the main body(71). The passing hole is combined with a part of an outer circumference of a wafer pad. An inner edge portion of a fence(73) is rounded. The abrasion and the deformation of the fence(70) is reduce since the coating layer(73) is formed on the surface of the main body in order to strengthen the surface hardness of the main body(71) with low hardness.
Patent KR-20010097342-A (KR)
Inventor: SUK NAM YEONG
IPC: B60S1/18
Filed: 2000-04-21
Abstract: 본 발명은 고정 브라켓에 탄성고무를 끼운 후에 핀으로써 와이퍼 링크를 차체에 간단히 고정함으로써, 작업 공수 및 부품수를 줄일 수 있는 와이퍼 링크의 고정구조를 제공한다. 와이퍼 모터와, 이 와이퍼 모터에 의해 작동되는 와이퍼 링크와, 피봇축을 개재하여 와이퍼 링크에 작동적으로 결합되는 와이퍼 아암과, 이 와이퍼 아암의 작동에 의해서 윈드실드의 표면을 따라 이동하면서 빗물이나 각종 먼지를 제거하는 와이퍼 브러시를 포함하는 차량용 와이퍼장치에 있어서, 본 발명의 와이퍼 링크 고정구조는 와이퍼 링크를 구성하는 프레임(10)의 중앙에 부착되는 고정 브라켓(18)과, 탄성고무를 개재하여 상기 고정 브라켓(18)의 장착공에 삽입됨으로써, 이 고정 브라켓(18)을 차체(40)에 고정시키는 체결수단으로 이루어져 있다.
Patent KR-20000077098-A (KR)
Title: 인터리브형 디지털 피크 검출기
IPC: G01R19/04
Filed: 2000-04-27
Abstract: 인터리브형 디지털 피크 검출기는 다중 획득 파이프를 구비하고, 상기 각 파이프는 공용 입력 신호를 수신한다.  각 획득 파이프는 각 파이프에 각 아날로그-디지털 변환기의 샘플 시간을 선택적으로 지연시키기 위해 아날로그 지연 회로를 통하여 지연되는 공용 샘플 클록 신호를 수신한다.  각 파이프는 아날로그-디지털 변환기로부터 디지타이징된 출력을 수신하고, 최대 및 최소 피크 값을 축적하는 피크 검출기를 갖는다.  프로그램 가능 데시메이터(decimator)는 샘플 클록 신호 및 데시메이션 값의 함수로서 샘플 클록 신호를 데시메이팅하여 획득 클록을 만들기 위한 데시메이션 값을 수신하여, 피크 검출기로부터 축적된 최대 및 최소 값을 저장하기 위해 래치 회로를 트리거(trigger)한다.  획득 메모리는 획득 구간에 걸쳐 래치된 최대 및 최소 피크 검출기 값을 저장하고, 각 획득 파이프로부터의 최대 및 최소 피크 검출기 값은 획득 파이프를 위한 획득 구간에 걸쳐 최대 및 최소 피크 검출기 값을 생성하기 위한 프로그램 제어 하에서 획득 구간에 걸쳐 비교가 이루어진다.
Patent KR-20010064669-A (KR)
Title: Web mapping system and method thereof
Inventor: KANG SEONG KWANG
IPC: G06F17/00
Filed: 2000-05-10
Abstract: PURPOSE: A web mapping system and a method thereof are provided to easily search and obtain all sorts of information on a building located in a desired area using an Internet service. CONSTITUTION: A host(300) of a web mapping system includes a map page storage unit(310), a data storage unit(320), a file server(330) and a transmission protocol(340). The host(300) is connected to a user computer(100) and a web site(400) in the center of the Internet(200), and forms a network. A homepage and a plurality of map pages are stored in the map page storage unit(310). Position information on a determined point on the map page and a detailed information page are stored in the data storage unit(320). The file server(330) calls a relevant map page from the map page storage unit(310) and the position information on the determined point on the map page and the detailed information page. The transmission protocol(340) transmits the map page provided from the file server(330) to a browser(130) of a user. The transmission protocol(340) transmits the detailed information page provided from the file server(330) to the browser(130) of the user.
Patent KR-20010103524-A (KR)
Inventor: KIM SEOK BAE
IPC: G06Q30/06
Filed: 2000-05-10
Abstract: 본 발명은 인터넷에서 실영상의 가상공간을 이용한 전자 상거래 시스템 및 그 방법에 관한 것으로서, 인터넷상에서 구현되는 가상공간을 실제 공간에 설치된 카메라에서 출력되는 현장영상을 실시간으로 입력받아 구현함으로써 직접 실시간에 실제 공간을 돌아다니면서 현장의 점원과의 전화나 인터넷을 통해 전자 상거래를 행할 수 있어 거리나 지역에 관계없이 직접 실매장에 나가 쇼핑하는 기분으로 전자 상거래를 행할 수 있는 이점이 있다.
Patent KR-20000054126-A (KR)
Inventor: YU DONG PIL
Filed: 2000-05-23
Abstract: PURPOSE: An aviation and marine transportation auction method using the internet is provided so that aviation and marine transportation can be performed on a web site, by providing the web site having an auction system to an administrator server to which a freight owner, forwarder, a mixing company and aviation company can connect. CONSTITUTION: A forwarder, a mixing company, an aviation company and a freight owner connect to and register at an administrator web site(5) respectively, by using their terminals(1,2,3,4). An auction object is registered at the corresponding web site(5). The auction progressing state is detected on the web site(5). The members join the auction on the web site(5) through their terminals(1,2,3,4). An administrator server(6) receives data relating to auction registration and participation of the members, registers the data at the web site(5), processes the data and displays an auction result on the web site(5).
Patent KR-20010109773-A (KR)
Inventor: JIN GYO YEONG
Filed: 2000-06-02
Abstract: 본 발명은 누설 전류를 방지할 수 있는 반도체 디램 장치 형성방법에 관한 것으로, 반도체 디램 장치의 형성방법에 있어서, 기판에 트랜지스터와 캐퍼시터 구조를 형성하는 단계 및  배선을 형성하는 단계에 이어서 실리콘 질화막으로 이루어진 보호막을 형성하는 단계와 어닐링을 통해 실리콘 질화막에 포함된 중수소를 상기 트랜지스터의 채널층에 확산시키는 단계가 구비되는 것을 특징으로 한다. 
     실리콘 질화막 내에 풍부한 중수소가 함유된 경우 질소 분위기의 아닐링을 통해서도 채널의 결정 결함 치유가 가능하다. 따라서 보호막인 실리콘 질화막을 수소의 소오스로 이용할 경우 실리콘 질화막은 중수소가 풍부한 분위기에서 형성되는 것이 바람직하다. 본 발명의 요지를 이루는 보호막 형성 후의 어닐링에 더하여 예비적 중수소 함유 어닐링이 이루어질 수 있다.
Patent KR-20000054385-A (KR)
Inventor: LEE HONG KYU
IPC: G01M15/05
Filed: 2000-06-03
Abstract: PURPOSE: A voice outputting self-diagnosis device is provided to be removably fixed to a vehicle and to output voices for informing a driver of a trouble by comparing the detected values of sensors and by deciding a trouble possibility and existent troubles. CONSTITUTION: Upon generating troubles in components or sensors, the value is input to a control unit such as an ECU(20), TCU(21), an ABS ECU(22) and an additional ECU(23). Then, the control unit decides if there are troubles and stores the result. A controller(40) receives sensing signals through sensors and compares the sensing signals each other to correctly compare and decide the troubles in the components and the sensors.
Patent KR-20020001086-A (KR)
Title: Apparatus and method for suffering information in elevator
Inventor: OH DU SEOK
IPC: B66B5/00
Filed: 2000-06-24
Abstract: PURPOSE: Device and method for supplying information in an elevator are provided to supply information of weather and news and to improve utility of education in moving on an elevator by supplying advertisement. CONSTITUTION: A device for supplying information in an elevator comprises a managing computer outputting input information into information supplying devices; an interface device(210) having a key input device receiving a key input signal; a controller(200) processing data outputting the key input signal into the interface device; a positive power supplying device supplying power into the controller; a server connecting unit(202) receiving data; an ROM(Read Only Memory)(204) memorizing control data; an LAN(Local Area Network)(205) memorizing data loaded from the managing computer; a graphic converting unit(203) outputting data received from the control unit by processing as graphic; a display unit(211) having the graphic converting unit; and a key input unit(212) generating a key signal to transmit into the control unit.
Patent KR-20020003039-A (KR)
Title: An apparatus for eliminating adhered coal from the surface of a hopper
Inventor: LEE JONG BAE
IPC: C10B43/04
Filed: 2000-06-30
Abstract: PURPOSE: An apparatus for removing coal adhered to a soft coal storage hopper is provided which improves removal efficiency of adhered coal by removing coal stuck to the inner surface of a hopper for storing and discharging soft coal using a scrapper. CONSTITUTION: The apparatus for removing coal adhered to a soft coal storage hopper comprises a weight(12) which is mounted so that it is vertically ascended or descended along vertical guide rails(10); a horizontal extension bar(24) which is extended to the upper part of a hopper(110) by being perpendicularly fixed to the guide rails, and at the end part of which a rotation axis(38) is installed; a chain(22) connected to a sprocket wheel(40) of the rotation axis and the weight respectively; a wire drum(34) on which a wire rope(36) is coiled, and which is rotationally mounted on the horizontal extension bar; a power transmission axis(28) which is connected to the wire drum and receives power from an electric motor(30); a sprocket wheel(44) of a body of revolution(46), the sprocket wheel is connected to a sprocket wheel of the electric motor, wherein the body of revolution carries the rotation axis so that the rotation axis penetrates the body of revolution, and rotationally supported on the upper part of the hopper; and a plurality of guide covers(52) radially fixed to the lower part of the body of revolution, wherein scrapers are carried in the guide covers so that a screw thread(38a) is connected to the guide covers through the medium of nut bodies(60) and link bars(58) which are coupled to the screw thread(38a) of the rotation axis.