baber/WOPTO huggingface dataset:
Patent KR-20030043026-A (KR)
Title: Apparatus for advertising real-time image on vehicles and method thereof
Inventor: HONG YEONG RAE
IPC: G06F15/00
Filed: 2001-11-26
Abstract: PURPOSE: A device and a method for a real-time mobile image AD(ADvertisement) using the satellite broadcasting and the satellite Internet are provided to fast and correctly transfer the AD, and to realize the interactive broadcasting schedule management by using the satellite broadcasting and the satellite Internet. CONSTITUTION: A satellite broadcasting receiving module(6) receives the broadcasting program from a broadcasting satellite(11), and makes a vehicle select and broadcast the program. A data service receiving module(8) offers various information in real-time during the AD broadcasting by receiving a data service from the satellite(11). A file receiving module(3) downloads new AD files in the AD server of an ISP(Internet Service Provider)(12) to a vehicle computer(10) through a satellite Internet connection module(2) by using the FTP(File Transfer Protocol). A streaming module(7) downloads the file, and simultaneously plays the AD by using a file playing module(5). An AD broadcasting scheduler module(4) makes an AD broadcasting schedule and controls other modules according to the schedule.
Patent KR-20010079506-A (KR)
IPC: E06B3/54
Filed: 2000-07-19
Abstract: 화재구역에 투입하여 화염의 엄습을 막기 위한 방화벽에 관한 것으로써, 상기 방화벽이 모듈식으로 구성된 부품(1,2)으로 이루어지며, 상기부품은 대부분 둘레의 케이스로 조합된 단면(5)으로 구성되고, 이 단면은 두 유리판 (3,4)의 거리를 유지하며, 이 때 유리판 (3,4)은 단면의 외부 모서리까지 이어지고 유리판의 부분 에나멜칠(19)에 의해 케이스가 커버되며, 부품(1,2)은 연결부품(9)에 의해 방화적층재(15)가 채워진 상태로 상하로 연결된다.
Patent KR-20010071849-A (KR)
Title: 내후성 조성물, 도료 및 성형품
IPC: C08K5/3475
Filed: 1999-07-08
Abstract: 본 발명은, 일반식(1) 
     
       
     
     [식중, A는 알킬렌기 등, R 1 및 R 2 는 기(B): 
     
       
     
     (식 중, R 3 및 R 4 는 알킬기 등을 표시한다.)을 표시한다.] 로 나타내는 비스벤조트리아조릴 페놀화합물, (메타)아크릴레이트 화합물 및 경화제를 함유한 내후성 조성물, 그 내후성 조성물을 주성분으로서 함유하는 도료 및 성형품에 관한 것이다. 본 조성물은, 기계적 강도등을 손상시키지 않고, 장기간에 걸쳐서 내후성, 내금속 이온성 및 투명성이 우수하며 또한 그 표면에 크랙이 발생하기 어려운 도막을 형성 할 수 있다.
Patent KR-20010085300-A (KR)
Title: Energy-consuming element for railway vehicles
IPC: B61G11/16
Filed: 1999-07-21
Abstract: The present invention relates to an energy-consuming element (1) which is intended for railway vehicles and which is made in the form of a housing comprising a triggering device (malfunction actuator). This invention is characterised in that the triggering device is designed as an axial fold at one end of the housing, wherein the fold line (5) in the circumference direction is designed so that, for the adjacent sides, the amplitude of said fold line (5) extends in the opposite direction. The place and the direction in which the fold line is formed can thus be determined in an appropriate manner. This system can also be used for advantageously reducing the triggering force for forming the first fold so that the structure of the vehicle is submitted to a lesser amount of stress in case of collision. This invention also relates to a method for producing this energy-consuming device from flat surfaces, wherein said method comprises only a few manufacturing operations such as cutting sheet-metal outlines, folding the same and assembling them by welding in order to provide an energy-consuming element (1).
Patent KR-20010080148-A (KR)
Title: Offline page monitoring
IPC: H04B1/7077
Filed: 1999-10-12
Abstract: A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.
Patent KR-20010080261-A (KR)
IPC: B01D33/76
Filed: 1999-10-22
Abstract: 본 발명은, 고형 재료, 특히 여과 공정에서 생성된 미세하게 분할된 고형 재료를 가압 공간으로부터 제거하기 위한 장치로서, 상기 장치에는 처리될 재료를 상기 가압 공간에서 실행될 공정으로 공급할 뿐만 아니라 상기 공정에서 생성된 생성물을 상기 가압 공간으로부터 제거하기 위한 부재가 제공된다.     본 발명에 따르면, 가압 공간(2, 22)에 연결된 배출부(4, 25)에는 고형 재료(5, 24)를 가압 공간(2, 22)으로부터 제거하기 위한 배출 구멍(8, 28)이 제공된다.     상기 배출 구멍(8, 28)에는, 상기 배출부(4, 25)에 위치하여 이 배출부(4, 25)로부터 제거되는 재료의 양(11, 31)을 조정하기 위한 1 이상의 조정 부재(9, 29)가 제공된다.
Patent KR-20010080993-A (KR)
IPC: H01L21/683
Filed: 2000-10-05
Abstract: 여러개의 반도체 웨이퍼가 상하로 서로 평행하게  간격을 두고 삽입될 수 있는 반도체 웨이퍼용 보유장치는 수직의 여러개의 버팀대(1)를 갖고 있고, 그 버팀대에는 링 또는 환형 세그먼트(2)가 서로 평행하게 상하로 간격을 두고 위치해 있다. 위쪽 방향으로 향해 있고 반도체 웨이퍼용 지지대를 형성하는 링 또는 환형 세그먼트(2)의 표면은 연마 되거나 또는 지지핀(20) 구비하고 있다.
Patent KR-20010082383-A (KR)
IPC: G06Q50/10
Filed: 2000-10-18
Abstract: 본 발명은 사용자가 선택적으로 정보를 나타내는 시스템 및 정보 처리 장치에 관한 것이다. 정보의 조회를 용이하게 하는 여러 영역 또는 구역을 갖는 디스플레이 스크린(101)을 포함한다. 흐름 구역(flow zone)(102)은 다양한 유닛과 콘텐츠에 대한 링크들 또는 포인터들(102)을 나타내고, 링크들은 임의의 방향으로 연속적으로 흐른다. 사용자는 흐름 속도 및 흐름 방향을 제어하고 임의의 링크를 선택하여 표시 구역(106)에 관련 콘텐츠의 전체 표시를 관찰하게 된다. 흐름 구역은 사용자가 선택가능한 필터 에이전트(105)에 따라 선택된 콘텐츠에 대한 링크들만을 포함하도록 제어될 수 있다. 개인 링크들을 디스플레이하는 토큰 영역(110) 및 토큰 검출기(113)를 사용하여, 개인 링크들은 물리적 토큰으로 저장되어 로드될 수 있다. 상기 토큰은 본 발명에 다른 시스템의 정보 처리 장치간의 개인 링크들을 실행하는데 사용될 수 있다.
Patent KR-20030096441-A (KR)
IPC: H04N19/593
Filed: 1997-11-06
Abstract: 부호화 대상 블럭의 모드 데이터를, 주변의 이미 부호화 완료된 블럭 모드 데이터로부터 예측하여, 예측 적중률에 따라 전환된 부호어표를 이용하여 부호화한다.  부호어표에서는, 적중률이 높은 부호화 모드의 부호어표를 짧게 하고 있다.
Patent KR-20010108274-A (KR)
Filed: 2000-12-22
Abstract: 본 발명은, 하기 화학식 I 등으로 표시되는 축합환 화합물 또는 제약상 허용되는 그 염, 및 이들 화합물을 함유하는 C형 간염 치료제에 관한 것이다. 
     화학식 I 
     
       
     
     (상기 식에서, 각 기호는 명세서에 기재한 바와 같음) 
     본 발명의 화합물은, C형 간염 바이러스(HCV) 폴리머라제 저해 작용에 의해 항HCV 작용을 나타내어 C형 간염의 치료제 또는 예방제로서 유용하다.
Patent KR-20020001781-A (KR)
IPC: G01N27/12
Filed: 2000-03-17
Abstract: 본 발명은 공기내에 가스와 연기를 검출하기 위한 방법 및 하나의 센서 소자를 포함하는 센서 장치에 관한 것이다.  상기 센서 소자는 선호되게는 가열구조 및 가스 감지층을 가지는 가열 산화금속 센서이며, 상기 층의 온도는 가열층과 제어장치를 이용하여 일정하게 유지될 수 있다.  센서 소자는 공기 흐름으로부터 보호하기 위해 바람직하게는 열절연 케이싱내에 배치되어 있으며, 상기 케이싱내로는 가스가 가스 투과성 확산층을 통과하여 침투할 수 있게 된다.  본 발명에 따른 방법에 있어서 가열 구조의 저항은 가스 감지층의 온도에 대한 측도(measure)로서 역할을 하며, 온도 제어용의 기준으로서 이용된다.  센서 소자의 온도는, 제어변수인 "센서 온도"에 추가 교란변수가 첨가되면서 의도하는 바대로 영향을 받게 되다.  평가는 센서값의 가중 평균 신호로 형성되며 그리고 우세한 상황에 적응되는 기준값과 각각의 실제 센서 신호를 비교함으로써 이루어진다.
Patent KR-20010111279-A (KR)
IPC: H04W16/12
Filed: 2000-03-10
Abstract: 경로손실 추정치를 사용한 채널 할당을 위한 방법 및 장치.  한 셀내에 위치한 이동국과 주위의 셀내에 위치한 기지국간의 경로손실치를 계산한다.  시스템은 계산된 경로손실치를 사용하여 한 셀내에 위치한 기지국에 소정의 채널을 할당함으로써 주위의 기지국내에 송신되는 간섭량을 판정할 수 있다.  또한, 시스템은 간섭원을 판정하고, 채널 할당에 이러한 판정을 이용할 수 있다.
Patent KR-20020009590-A (KR)
Title: (s)-enantiomer enriched fipronil composition
IPC: A01N47/02
Filed: 2000-04-12
Abstract: A composition comprising (S)-5-amino-3-cyano-1-(2,6-dichloro-4- trifluoromethylphenyl)-4-trifluoromethylsulfinylpyrazole and (R)-5-amino- 3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4- trifluoromethylsulfinylpyrazole wherein the composition is enantiomerically enriched in the S-enantiomer.
Patent KR-20030068734-A (KR)
Title: Method of converting optical characteristics and recombination characteristics of minority carriers in semiconductor devices by electron irradiation and annealing
Inventor: CHO JUNG YEOL
IPC: H01L21/324
Filed: 2002-02-16
Abstract: PURPOSE: A method for converting an optical characteristic of a semiconductor device and a recombination characteristic of minority carriers by electron irradiation and annealing is provided to convert the optical characteristic from an indirect type to a direct type and make the recombination characteristic more rapidly by irradiating electrons to the semiconductor device and by performing an annealing process in a hydrogen atmosphere. CONSTITUTION: Electrons having energy of not greater than 500 kilo electron volt are irradiated to the semiconductor device by an irradiation quantity of 1x10¬16 - 1x10¬20 electron/square meter. The electron-irradiated semiconductor device is annealed at a temperature of 300-700 deg.C in a hydrogen or nitrogen atmosphere.
Patent KR-20020069150-A (KR)
Title: Novel polypeptide having anticancer and antimicrobial activity, and anticancer and antimicrobial composition comprising the same
Inventor: KIM SEOK WON
IPC: C07K7/08
Filed: 2002-02-22
Abstract: PURPOSE: Provided are a novel polypeptide having an anticancer and antimicrobial activity without hemolysis and side effects in a human body, and an anticancer and antimicrobial composition comprising the same. CONSTITUTION: The novel polypeptide is represented by the formula(1): F-L-X¬1-X¬2-L-X¬3-X¬4-X¬5-X¬6-X¬7-K-L-X¬8, wherein X¬1 and X¬7 are random amino acids; X¬2, X¬5, X¬6 and X¬8 are independently hydrophobic amino acids; X¬3 is basic amino acid or hydrophobic amino acid; X¬4 is lysine(K) or leucine(L) residue; and the rest of letters represents amino acids.
Patent KR-20030073646-A (KR)
Title: A union structure and manufacture method of sandwich panel
Inventor: KIM SEO UN
IPC: E06B3/70
Filed: 2002-03-12
Abstract: PURPOSE: A manufacturing method of a sandwich panel door is provided to improve production efficiency by decreasing the unit cost of a panel. CONSTITUTION: The manufacturing method of a sandwich panel door comprises the steps of: interposing and fastening bending planes, which are formed on each end of an upper plate(102) and a lower plate(103), to each fastening groove formed longitudinally on both sides of a trim cap(100); adhering an outer round plane of each bending plane closely to an upper cogged joint(101a) of the fastening groove to connect a space between the upper plate(102) and the lower plate(103) with a space of the fastening groove; and filling up a space between the upper plate(102) and the lower plate(103) with a foaming agent(104) to make the filled foaming agent(104) flow in the fastening groove of the trim cap(100).
Patent KR-20030075366-A (KR)
Title: substrate safekeeping device for manufacturing of liquid crystal display
Inventor: LEE SANG SEOK
IPC: G02F1/13
Filed: 2002-03-18
Abstract: PURPOSE: A substrate keeping device for fabricating a liquid crystal display device is provided to stably support substrates by distributing local stress concentration along dummy areas of the substrates by realizing the surface contact with the substrates by a plurality of supporting plates. CONSTITUTION: A substrate keeping device for fabricating a liquid crystal display device includes a frame part(100) forming an appearance, and supporting plates(110) integrated to both side surfaces in the frame part for defining a plurality of substrate keeping layers in the frame part. The respective supporting plates have a plurality of grooves(111) on top surfaces for inserting finger parts which carry the substrates. The depth of the grooves is larger than a thickness of the finger parts for preventing the interference with the finger parts, thereby realizing the smooth inserting and withdrawing of the substrates. The supporting plates support the substrates with the other surfaces coated with a teflon or pick material to protect the surfaces of the substrates from being scratched.
Patent KR-20020028178-A (KR)
Inventor: KIM SANG NYUN
IPC: A01K85/00
Filed: 2002-03-19
Abstract: PURPOSE: An activated lure for fishing is provided to easily entice and capture fish by causing visual interest, to promote the capture of fish, and to achieve mass production thereof. CONSTITUTION: The activated lure for fishing is comprised of a lure body(1) made of rubber or synthetic resin material and formed with a fishing string loop(3) on the back portion; a driving shaft device(15) having a windup spring handle(10) separably coupled on the one end, a main driving gear(11) on the center portion, and a windup spring(13,14) wound on both sides of the main driving gear, the one end of the windup spring is fixed to a support shaft(12); a speed reduction device(19) having several transmission shafts(16,17,18) arranged successively, to which transmission gears(16a,17a,18a) are fitted; a speed increase rotating shaft device(21) having a driving gear(20) engaged with the transmission gear of the speed reduction device; a waterwheel(22,23) having plural wing members installed at both ends of the speed increase rotating shaft device; and a support(9) for bearing the driving shaft device, the speed reduction device, and the speed increase rotating shaft device.
Patent KR-20020077205-A (KR)
Inventor: MATSUOKA TOSHIHIRO
IPC: G21C19/40
Filed: 2002-03-28
Abstract: PURPOSE: To reduce the outside diameter of a basket used for a spent fuel assembly to be smaller than conventional one. CONSTITUTION: A corner part A of a square pipe 300, constituting a basket, is formed stepwise. When constituting a basket with this square pipe 300, the square pipes 300 are arranged staggeredly and the stepwise parts provided in corners are combined. Thus, the inside of the square pipes 300 and the space surrounded by 4 sides 12 of the square pipes respectively become cells 400 and 401. The basket 200 arranges the square pipes 300 staggeredly, and thus the sides 12 of the cells 400 and the like are constituted of a single plate. As a result, stiffness becomes higher compared with the case overlapping two plates with a half thickness of the sides 12, and thus the thickness of the plate of the side can be made small, if the stiffness id the same. Then, the outer diameter of the basket can be made smaller.
Patent KR-20030078303-A (KR)
Title: Mumes-vinegar mixture and the method of preparation thereof
Inventor: JUNG MUN DO
IPC: C12J1/00
Filed: 2002-03-29
Abstract: PURPOSE: A japanese apricot-persimmon vinegar mixture and a preparation method thereof are provided, thereby effectively preparing a health food having healthful effects of japanese apricot and persimmon vinegar. CONSTITUTION: A method for preparing japanese apricot-persimmon vinegar mixture comprises the steps of: fermenting persimmon to prepare persimmon vinegar; and dipping japanese apricot in the persimmon vinegar and fermenting the mixture thereof, wherein the japanese apricot-persimmon vinegar mixture is further dried; the pH of persimmon vinegar is 1.5 to 4.0; the amount of the persimmon vinegar added is 10 to 95 wt.%; the amount of the japanese apricot added is 5 to 90 wt.%; the pH of the mixture of japanese apricot and persimmon vinegar is 3.0 or more.
Patent KR-20020031143-A (KR)
Inventor: LEE JUNG BU
IPC: A47F3/04
Filed: 2002-04-02
Abstract: PURPOSE: Provided is an environmentally friendship showcase for lunch box and beverage container acting by means of thermoelectric module to continuously maintain freshness of contents and to remove frost generated by refrigeration. CONSTITUTION: The showcase having a desired receipt space to place a food container and an opened front side comprises a heat sink(28) to generate heat; a cold sink(32) integrated with the heat sink to absorb the heat; a thermoelectric module assembly(36) containing a thermoelectric module to generate or absorb the heat along directions of the electricity introduction; an inner air fan(34) mounted inside the showcase to circulate a cold air generated by the assembly and to supply the air to the receipt space; a heat sink fan(30) formed outside the showcase to control power for activating endothermic reaction between the air fan, the heat sink fan and the thermoelectric module.
Patent KR-20030080681-A (KR)
Title: Apparatus that attach masking tape for Metal CSP
Inventor: KIM SUNG HEE
IPC: H01L23/28
Filed: 2002-04-10
Abstract: PURPOSE: An apparatus for attaching a protection tape for a metal CSP(Chip Size Package) is provided to be capable of preventing the deformation and damage of a lead of a lead frame when carrying out a bonding process at the metal CSP by using the first, second, and third guide roller, and a vacuum block. CONSTITUTION: An apparatus for attaching a protection tape(14) for a metal CSP is provided with the first, second, and third guide roller(8,9,10) sequentially installed at a base plate(11) for guiding the protection tape, a vacuum block(3) having an additional suction line, connected to the first cylinder(3a) installed at the base plate for adsorbing the protection tape supplied from the third guide roller, a cutter(4) connected to second cylinder(4a) for being moved up and down, a plurality of compressible rollers(5) connected to the third cylinder(5a), a transfer die(7) installed at the upper portion of a table(12) for transferring a lead frame(13), and a cutting die(6) located at the front portion of the vacuum block for fixing the protection tape.
Patent KR-20030084057-A (KR)
Title: Process table of process chamber for manufactruring semiconductro device
Inventor: KIM HYEONG RYONG
IPC: H01L21/68
Filed: 2002-04-24
Abstract: PURPOSE: A process table of a process chamber for fabricating a semiconductor device is provided to prevent a wafer on a fork from being separated from the fork by sliding the wafer in a rotation process of a heating block of the process table. CONSTITUTION: A fork assembly receiving groove(44) is formed on the upper surface of the heating block(42) capable of rotating at a predetermined angle. A body part(46) can vertically transfer over the heating block. A wafer receiving groove(52) is formed on the upper surface of the fork(50) that is composed of a pair of two protruding bars(48a,48b) formed in the periphery of the body part. A fork assembly includes the body part and the fork.
Patent KR-20030084098-A (KR)
Title: Fibrinolytic enzyme and it's preparation
Inventor: JUN SEUNG IL
IPC: A61K38/43
Filed: 2002-04-24
Abstract: PURPOSE: Provided is a method for producing an enzyme(nattokinase) having excellent thrombolytic activity massively using Bacillus subtilis KCCM(IFO 3335). The produce enzyme is used as a thrombolytic agent and its production cost is low. CONSTITUTION: Bacillus subtilis is inoculated into a medium comprising 0.2 to 1.0% by weight of glucose, 1.0 to 5.0% by weight of defatted soy bean and 0.2 to 5.0% by weight of yeast extract, cultured for 24hr at 37deg.C and then concentrated with a UF system. Thereafter, the concentrate is added 3 times of ethanol, precipitated and vacuum-dried at -70deg.C to give nattokinase. The nattokinase is useful as a functional food.
Patent KR-20020048334-A (KR)
Inventor: HWANG GWANG SEON
IPC: H04H7/00
Filed: 2002-04-30
Abstract: PURPOSE: An unmanned broadcasting control system is provided to perform the broadcasting economically and implement various screens in the broadcasting system of a small-scale broadcasting station, a handy broadcasting station, a church, an academy and a school, and an office etc. CONSTITUTION: Cameras(10a-10n) are connected to an AV switch(11) and performs a power on/off, photographing/waiting, a photographing position, and P/T/F/Z(Pan/Tilt/Focus/Zoom) operations under the control signal of a control unit(15). The A/V switch(11) outputs the image signal of the camera to a mixing device(20). A display unit(13) displays the photographing or editing image to a screen. A peripheral device(20) is an electro-motive microphone system or a speaker system. A projector(16) projects the editing image of the mixing device(20) to a screen(17). A file conversion unit(19) converts the image signal outputted from the mixing device(20) into ASF or WMV file, RM file, MOV file etc. A DVR(21) is an image storage media for storing the image signal edited by the mixing device(20).
Patent KR-20030085392-A (KR)
Title: Method for multi-booting of ROM in a communication system
Inventor: KWAK BYEONG IK
IPC: G06F9/445
Filed: 2002-04-30
Abstract: PURPOSE: A method for multi-booting a ROM on a communication system is provided to enable an operator to perform operation/test in a necessary version by using many booting ROM through multi-booting, and to facilitate the version upgrade test/application for dual-application. CONSTITUTION: After confirming a requested register value at a state dividing the ROM into plural regions, the booting is performed by moving to the ROM if the requested register value is set(S101-S107). If the requested register is not set, a state register value is read(S109). If the state register value is zero, the booting is performed from the zero ROM region(S110-S111). If the state register value is '1A', the state register value is changed to '00', the booting is performed by the first ROM, and the state register value is changed to '11' after the booting(S113-S115). If the state register value is '11', the booting is performed by the first ROM(S117).
Patent KR-20030085394-A (KR)
Title: Apparatus for interfacing between BSC and BTS in a mobile communication inbuilding system
Inventor: CHA YEONG JAE
IPC: H04W24/00
Filed: 2002-04-30
Abstract: PURPOSE: An apparatus for interfacing a control station and a base station in a mobile communication in-building system is provided to compact a system and improve the efficiency by realizing communication between the control station and the base station by using Ethernet or 25M serial communication. CONSTITUTION: A satellite receiving apparatus(110) receives signals transmitted from a satellite. An Ethernet hub apparatus(120) is provided for Ethernet communication with a base station(200). A 25M transmitting unit(140) is provided for high speed data communication with the base station(200). An Ethernet hub apparatus(210) executes connection with a control station(100) and an Internet network. An E1/T1 transmitting unit(220) communicates data with an E1/T1 transmitting unit(130) of the control station(100). A base station controller(230) receives time signals and system clocks through HDLC(High-level Data Link Controller) communication with the satellite receiving apparatus(110) for controlling whole operations of the base station(200). A digital unit interface unit(240) interfaces call process data through 25M serial communication with the 25M transmitting unit(140). A digital unit control agent(250) controls the digital unit. A channel card agent(260) has a base station channel card inside. A base band downward control agent(270) downwardly converts base band signals. A base band upward control agent(280) upwardly converts the base band signals. An RF control agent(290) executes RF signal processing.
Patent KR-20030085730-A (KR)
Title: tag axle system for automotive vehicle
Inventor: PARK SEUNG HO
IPC: B62D61/12
Filed: 2002-05-01
Abstract: PURPOSE: A tag axle device of a vehicle is provided to prevent occurrence of an accident caused by operation of the tag axle device by artificially restricting operation of the tag axle device followed by misoperation during traveling on a slope way. CONSTITUTION: A tag axle device of a vehicle promotes pressurization of a base arm followed by rotation of a yoke by inducing operation of a hydraulic cylinder(8) through hydraulic pressure produced from a hydraulic pump(10) according to the switching of an operating switch and the rising of a tag axle by promoting rotation of a balance arm followed by pressurization of the base arm. An oil passage-switching solenoid valve(11) to change the transmission path of hydraulic pressure is installed between the hydraulic cylinder and the hydraulic pump. The oil passage-switching solenoid valve receives the control of a control unit(12) to prevent the hydraulic pressure, produced from the hydraulic pump, from being supplied to a pressure chamber(8a) of the operating side of the hydraulic cylinder according to the gradient of the road.