baber/WOPTO huggingface dataset:
Patent KR-20000043129-A (KR)
Title: Structure for absorbing tolerance of roof rack stay and rail of vehicle
Inventor: JEONG SEONG HUN
IPC: B62D25/06
Filed: 1998-12-28
Abstract: PURPOSE: A tolerance absorbing structure of a roof rack stay and a rail of a vehicle is provided to make matching of a stay excellent despite of tolerance of a curved part of a roof panel by combining a stay composing a roof rack to a rail smoothly. CONSTITUTION: A pad(20) for absorbing tolerance is inserted to a shaft part(62) of a stay(60). A hollow core part(72) of a rail(70) is inserted. The rail is assembled with the stay by fixing a connecting bolt(40). A pad is installed on the bottom of the stay. The stay with the bolt is fixed to a reinforced panel placed on the lower part of a roof panel(100) by a nut. Thus assembling is completed. The pad is elastically deformed and absorbs tolerance even if a curved tolerance is generated in the roof panel. The rail is moved according to the curved tolerance by a bolt hole(30) formed in long hole and absorbs the tolerance. Thereby, matching of the stay and the roof panel becomes excellent.
Patent KR-20000044656-A (KR)
Title: Method for manufacturing isolating film of semiconductor device
Inventor: PI SEUNG HO
IPC: H01L21/76
Filed: 1998-12-30
Abstract: PURPOSE: A method for fabricating an element isolating film of a semiconductor device is provided to prevent an element isolating oxide layer from damaging and to allow trench edges to be smooth by treating upper and lower edges of the trench with a hydrogen heat treatment. CONSTITUTION: A pad oxide layer(2), a pad nitrated film(3) and a first oxide layer(4) are sequentially formed on a silicon substrate(1). Then, an isolating mask pattern is formed by etching the first oxide layer(4), the pad oxide layer(2), and the pad nitrated film(3). After that, a second oxide layer(5) is formed thereon and an oxide layer spacer(5A) is provided at a side wall of the isolating mask pattern by etching the second oxide layer(5). By using the first oxide layer(4) and the oxide layer spacer(5A) as an etching mask, a trench(t) is formed on the silicon substrate(1). Edges of the trench(t) are exposed by removing the oxide layer spacer(5A) and are made to be smooth by the heat treatment in the hydrogen atmosphere. Finally, an isolating film is formed by inputting the oxide layers(4,5) into the trench(t).
Patent KR-20000044852-A (KR)
Title: Liquid delivery system
Inventor: PYO SEONG GYU
IPC: C23C16/448
Filed: 1998-12-30
Abstract: PURPOSE: A liquid delivery system is provided to increase a speed of depositing a copper. CONSTITUTION: A liquid delivery system comprises a copper liquid material supply part(40), a transfer gas supply part(50), an evaporation part(60) and a jet part(70). The copper liquid material supply part(40) supplies a copper liquid material to the evaporation part(60) through an orifice(47) rotating a constant speed. The transfer gas supply part(50) jets transfer gas through a jet nozzle(55) so that the copper liquid material supplied to the evaporation part(60) through the orifice is formed into a fine drop. The fine drop is evaporated by the evaporation part(60). The jet part(70) jets the evaporated copper vapor at a reaction chamber.
Patent KR-20000046230-A (KR)
Title: Subscriber connection apparatus having expanded dynamic region and expanding method thereof
Inventor: LEE JANG HO
IPC: H04B7/24
Filed: 1998-12-31
Abstract: PURPOSE: A subscriber connection apparatus having an expanded dynamic region and an expanding method thereof are provided for improving an installation place environment of RIU by maintaining a certain receiving range of RSSI and opening a state of an externally received RSSI value by adjusting one stage amplifier in LNA as a receiving RSSI value is varied above or below a certain level. CONSTITUTION: There are provided a low noise amplifier(LNA)(20) formed of in three stages for amplifying a signal received from a RF antenna(110), a modem(130) for receiving a data that the receiving signal is RF-processed and outputting RSSI, a serial A/D converter(140) for converting an analog RSSI data outputted through the modem(130) into a serial digital data, and an amplification control processor(150) for comparing the intensity of a receiving signal received the RSSI which is converted into the serial digital data with a reference intensity, adjusting the intensity of the receiving signal and adjusting the three stage low noise amplifier(120).
Patent KR-19990067288-A (KR)
Title: 셀 구속 구조체
IPC: E02D17/20
Filed: 1996-10-30
Abstract: 재료의 구속을 위한 셀 구속 구조(10)는 제한된 영역(16)에서 일정간격 이격되어 서로 나란하게 접합된 관계에 있는 다수의 길다란 플라스틱 스트립을 가지며, 상기 다수의 스트립(14)이 상기 셀(20)의 단위 웨브를 형성할 수 있는 폭으로 펼쳐질 수 있다. 상기 스트립이 다수의 애퍼쳐(34)를 가지는 셀 벽 중 적어도 하나로 상기 셀의 벽을 형성하며, 상기 애퍼쳐 각각의 직경은 약 3㎜와 약 17㎜ 사이이다.  바람직하게는, 상기 셀 벽 각각은 다수의 애퍼쳐를 가지며, 상기 셀 벽 내의 애퍼쳐의 전체면적은 상기 셀 벽 면적의 19%와 28% 사이이다.
Patent KR-19990067439-A (KR)
Title: 혈관내막비후 억제제
IPC: C07C323/20
Filed: 1996-11-08
Abstract: 하기 화학식 1 로 나타낸 화합물을  유효성분으로 함유하는 것을 특징으로 하는 혈관내막비후 억제제 : 
     [화학식 1] 
     
       
     
     [식중,  X  는  산소원자  또는  화학식 2 의 기를 나타내고; 
     [화학식 2] 
     
       
     
     (식중, n 은  0 내지 2 의 정수를 나타낸다); 
     R 1 은 수소원자 또는 아실기를 나타내고; R 2 는 수소원자, 저급 알킬기 또는 저급 알케닐기를 나타내고; R 3 은 저급 알킬기를 나타내고; 및 R 4 , R 5 및 R 6 은, 동일하거나 상이할 수 있고, 각각  수소원자 또는 치환 또는 비치환된 알킬기를 나타내고; 또는 R 3 및 R 4 는 함께 5-원 고리를 형성할 수 있고; 또는 R 5 및 R 6 이 함께 시클로알킬기를 형성할 수 있으며;  단, R 3 및 R 4 가 함께 벤조푸란 또는 벤조[b]티오펜을 형성하는 경우, R 6 이  존재하지 않는다].
Patent KR-20000064439-A (KR)
Title: 전기전도성섬유
IPC: D01F6/90
Filed: 1995-12-18
Abstract: 고강도 폴리(p-페닐렌 테레프탈아미드) 섬유는 술폰산기로 고리-치환된 폴리아닐린에 의해 전기적으로 전도성이 된다.
Patent KR-20000050369-A (KR)
Inventor: LEE HYUNG CHEOL
IPC: H02P25/08
Filed: 1999-01-07
Abstract: PURPOSE: A stator of a switched reluctance motor is provided to energize one phase by connecting three phases of a stator and distributing the energy which is accumulated in the winding of the energized phase when the next phase is energized. CONSTITUTION: A rectifying means(100) is an A/D converter which converts the AC input current which is inputted from a power inputting terminal(1) to the DC current. The rectifying means(100) comprises a bridge rectifier(102) and a condenser(C1). An electrical power means(110) receives a DC power source which is converted from the rectifying means(100), and converts the DC power to an AC power. A controlling means(120) receives the DC voltage which is outputted from the electrical power means, and outputs switching signals for energizing three phases of a stator(150) sequentially.
Patent KR-20000050673-A (KR)
Inventor: PARK JONG HWAN
IPC: H01J9/20
Filed: 1999-01-13
Abstract: PURPOSE: A composition having durability and pollution-proof is provided for a spray layer and a transparent conductive layer having the spray layer made from the composition, and to improve properties thereof. CONSTITUTION: A composition for a spray layer(50) includes at least one compound selected from the group consisting of metal alkoxide, M1(OR)4, wherein M1 is Si, Ti, Sn or Zr, and R is an alkyl having one to four carbon atoms, and silicon alkoxide oligomer, (SiO)n(OR)4-2n, wherein n is zero or one, and R is an alkyl having one to four carbon atoms. The composition further includes fluoroalkyl silane, acid catalyst, and solvent. Moreover, the weight ratio of the compound to fluoroalkyl silane is four through six to one. In particular, a transparent conductive layer includes outermost the spray layer(50) having a hydrophobic property due to the fluoroalkyl silane. Preferably, the area of the spray layer(50) is thirty percent to seventy percent of that of a glass panel(20).
Patent KR-19990072312-A (KR)
Title: 전기단자및단자모듈제조방법
IPC: H01R43/16
Filed: 1999-01-28
Abstract: 전기 단자 및/또는 단자 모듈(36)의 제조 방법이 개시되어 있다.  본 발명의 방법은 금속 재료로 된 시트로부터 한 단부에 접촉부(30)를 갖고 다른 단부에 단자부(28a, 28b)를 가지며 단부들 중간에서 타이 바아(16)에 의해 단자를 연결시키는 다수의 긴 단자를 위한 블랭크(10)를 스탬핑하는 단계를 포함한다.  각 단자의 접촉부(30)는 스탬핑 단계에 의해 서로 분리된다.  단자부(28a, 28b)는 스탬핑 단계 후에 금속의 시트에 연결된 채로 남는다.  그후 블랭크는 단자부(28a, 28b)를 분리시키기 위해 전단된다.  그후 타이 바아(16)가 단자를 분리시키기 위해 절단된다.  단자 모듈(36)을 형성하기 위해 유전성 하우징(34)이 단부들 중간의 단자 둘레에 오버몰드되는 데, 타이 바아(16)는 하우징의 외부에 위치되어 오버몰드 공정 후에 제거된다.
Patent KR-19990072547-A (KR)
Title: 개선된가수분해안정성을갖는난연성카보네이트중합체조성물
IPC: C08K5/523
Filed: 1999-02-10
Abstract: 본 발명은, 하나 이상의 방향족 폴리카보네이트 수지를 포함한 열가소성 수지, 및 난연량의 유기인 난연성 화합물(이 때, 초기에 화합물내에 존재하는 임의의 산 및 산-생성 불순물은, 상기 임의의 산과 상기 산-생성 불순물로부터 가수분해 조건하에 발생될 수 있는 임의의 산의 혼합량이 유기인 화합물 1g당 수산화칼륨 약 1.0㎎ 미만의 적정가능한 산 농도와 동일한 수준을 초과하지 않는다)을 포함하는 난연성 열가소성 수지 조성물에 관한 것이다.
Patent KR-20000056395-A (KR)
Inventor: SHIN JEONG SEONG
IPC: H01R33/76
Filed: 1999-02-20
Abstract: PURPOSE: An integrated circuit test socket using a connection pin having a symmetrical structure is provided to increase the manufacturing efficiency by securing the connection pin on the test socket. CONSTITUTION: An integrated circuit test socket using a connection pin having a symmetrical structure includes a plurality of conductive connection pins(30), an insulation cover(20), and an insulation base(40). The plurality of conductive connection pins(30) includes a first terminal which includes a first and a second leads and a terminal pin which is electrically coupled with an outer board. The insulation cover(20) includes a vertical translator(22) which translates the first and the second leads of the connection pin horizontally. The plurality of connection pin containers(23) are separated by the vertical translator. The insulation base(40) supports the connection pin and the cover and is elastically coupled with the cover by an elastic material. The vertical translator moves vertically with the cover, and the first and the second leads are symmetrical with the terminal pin at its center.
Patent KR-20000056596-A (KR)
Title: Printer
Inventor: HAN JUNG SU
IPC: B41J2/00
Filed: 1999-02-24
Abstract: PURPOSE: A printer is provided to automatically amend printing concentration amendment and maintain a stable concentration reproduction performance. CONSTITUTION: A printer includes a printing engine(10) for printing images on a paper, a concentration detecting element(50) for detecting concentration of an image formed by the printing engine, and a controller(30) recorded with test pattern image data for amending concentration for measuring an error amount of concentration reproduction of the image formed by the printing engine, controlling the printing engine for forming test pattern images corresponding to the test pattern image data, computing a concentration reproduction error amount for the test pattern image by receiving a concentration data from the concentration detecting element, and amending a received image data for amending the computed concentration reproduction error amount to output to the printing engine.
Patent KR-19990045954-A (KR)
Title: 숯가루가함침된지류
IPC: D21H17/02
Filed: 1999-02-27
Abstract: 적정양의 숯분말을 함침시켜서 숯가루가 함침된 지류를 제조하므로서 초배지, 벽지 또는 포장지로 사용시에 인체건강이나 실내에 유익하게 한 것이다.
Patent KR-19990046042-A (KR)
IPC: B32B18/00
Filed: 1999-03-16
Abstract: 본 발명은 회전기기의 축봉장치로서 고속회전에 저항을 거의 주지 않으면서도 유체를 밀봉시켜서 차단시키는 회전기기의 축봉장치인 메카니칼씰 부재에 관한 것으로, 씰용부재를 모재와 접촉재의 2중재질로 구분하되, 모재는 실리콘카바이드를 주성분으로 구성하고, 접촉재는 그라파이트 입자와 실리콘카바이드의 복합성분을 주성분으로 구성시켜서, 서로를 일체화시킨 2중재질을 갖는 실리콘카바이드의 씰용 부재와;  그라파이트를 분쇄하여 100∼500마이크론 크기로 제어하고 이를 실리콘카바이드 분말과 전체 중량비 10∼40%로 첨가 배합시켜 그라파이트-실리콘카바이드 혼합분말을 형성하고, 그 혼합분말에 유기결합체를 전체중량비 0.5∼10% 혼합하여 이를 씰용부재 형상의 금형내에 10∼30% 1차 충전시키고 그 잔여공간에 실리콘 카바이드가 주조성물인 모재분말을 2차 충전시킨 후, 300∼1000㎏/㎠의 압력으로 압축성형시켜 건조시킨 다음 이를 진공소결로에 내입하여 1600∼1750℃로 10∼60분 동안 가열하여 용융실리콘의 침투반응법에 의해 서로 일체로 반응 소결되게 하는 2중재질을 갖는 실리콘카바이드의 씰용 부재의 제조방법이다.
Patent KR-20000061915-A (KR)
Inventor: PARK GEUN BAE
IPC: G01M99/00
Filed: 1999-03-31
Abstract: PURPOSE: A handle estimation tester is provided to automatically test a manipulation component moved by an artificial force. CONSTITUTION: A robot type arm is prepared to repeatedly manipulate a handle of a manipulation component. An actuator(M2) is installed to act the arm with electricity. A displacement sensor(32) measures the displacement amount of the arm according to the repeated manipulation of the handle. A load cell(34) measures a load acted from the handle and a rotary encoder measures a rotary slant angle of the handle by the repeated manipulation of the handle. A displayer displays a value measured in the displacement sensor, load cell and rotary encoder.
Patent KR-20000067087-A (KR)
Inventor: OH JUNG SIK
IPC: B23K13/01
Filed: 1999-04-23
Abstract: PURPOSE: An induction heater is provided to automatically perform loading and unloading of a heating plate by installing a loading device on an upper part of a main body for adhering the heating plate to a lower face of a work coil and separating from the work coil as needed. CONSTITUTION: In replacing or separating a work coil(110), a lift bar(220) interferes a separation work. In the case, a heating plate(230) is removed by unfastening a female screw connected to a lower end of the lift bar. After ascending the lift bar maximally, a pin is inserted in a through bore(220). The lift bar is temporarily fixed on a frame(12) on an upper part of a main body(100). Thus, the separation work of the work coil is performed without being interfered by the lift bar.
Patent KR-20000067207-A (KR)
Inventor: CHOI YEONG BONG
IPC: H04N3/22
Filed: 1999-04-26
Abstract: PURPOSE: A screen uniformity compensation circuit using a focus waveform is provided to compensate the brightness of whole surface of a cathode ray tube. CONSTITUTION: A screen uniformity compensation circuit using a focus waveform includes a vertical/horizontal processor(10), a parabolic inverter circuit(20) and a mixing circuit(40). The vertical/horizontal processor(10) outputs vertical/horizontal component focus parabolic waveforms. The parabolic inverter circuit(20) inverts the focus parabolic waveform output from the vertical/horizontal processor. The mixing circuit(40) mixes the output of the parabolic inverter circuit with the red(R).green(G).blue(B) waveforms which are amplified at an image pre-amplifier and outputs the mixed result on the cathode ray tube screen via a main amplifier.
Patent KR-20000005703-A (KR)
Inventor: THOMAS NEOLTGE
IPC: D05B3/06
Filed: 1999-05-24
Abstract: PURPOSE: A sewing machine is provided to freely control the stitch width without replacing the sewing tool and to keep the best sewing pattern. CONSTITUTION: A sewing machine comprises: a needle stand(4) interacting with a spindle(11) supported on a base plate(12) and horizontally swinging; a table(9) driven toward two directions(x,y) by two motors(60,80) and holding the sewing(36); a cutting device(34) sewing a buttonhole(28) with cut line(32) on the sewing; and a control device(90) calling out various input buttonhole pattern.
Patent KR-20000074645-A (KR)
Title: Head drum assembly
Inventor: EO HAE WON
IPC: G11B5/53
Filed: 1999-05-24
Abstract: PURPOSE: A head drum assembly is to rotatably and slidably support an upper drum using one ball bearing and a plurality of magnets, thereby reducing a fabricating cost and facilitating an assembling operation. CONSTITUTION: A head drum assembly comprises a fixing shaft(10); and a lower drum(30) fixed to a lower end of the fixing shaft to have a stator transformer at a central upper portion thereof; an upper drum(20) having a rotor transformer at a central lower portion thereof and a plurality of heads at an outer lower portion thereof; a bearing unit disposed between an inner circumferential face of the upper drum and the fixing shaft to rolling-support the lower portion of the upper drum and slidably support the upper portion of the upper drum; and a motor(40) having a rotor fixed to the upper drum and a stator(43) fixed to the fixing shaft through a boss(50). In the head drum, the beating unit is comprised of a ball bearing(B) disposed between the central lower portion of the upper drum and the fixing shaft, and a first and second magnet(100,200) respectively and fixedly disposed between central upper face and the boss of the motor to repel each other.
Patent KR-20000075251-A (KR)
Inventor: NOH HYEONG GON
IPC: H01M10/04
Filed: 1999-05-31
Abstract: PURPOSE: A method for manufacturing a secondary lithium battery is provided to simplify the manufacturing process of a secondary lithium battery and reduce the manufacturing cost. CONSTITUTION: A cathode active material slurry composition comprising a lithium complex oxide of eighty to ninety five weight percent, an engaging material of five to fifteen weight percent, and a conductive material of four to ten weight percent is cast on a collector, and then is dried to manufacture a cathode pole plate. An anode active material slurry composition comprising a lithium metal of eighty to ninety five weight percent, an engaging material of five to fifteen weight percent, and a conductive material of four to ten weight percent is cast on the collector, and then is dried to manufacture an anode pole plate. A film is manufactured from a polymer matrix forming composition, and a porous polymer matrix is manufactured. The cathode pole plate, the porous polymer matrix, and the anode pole plate are sequentially stacked, and are submerged in an organic electrolyte.
Patent KR-20000053674-A (KR)
Inventor: SHIN CHUN WOO
IPC: H01P3/16
Filed: 1999-06-02
Abstract: PURPOSE: A nonradiative dielectric waveguide having a multilayered space structure is provided to put nonradiative dielectric waveguides of different sizes corresponding to employed frequencies in a single circuit for putting a plurality of frequency circuits in a single module, thereby simplifying the manufacturing of a high frequency circuit. CONSTITUTION: A plurality of metal plates(10,11) having different shapes is stacked each other for forming a various space between the metal plates. A plurality of dielectric waveguides(20,21) has different sizes for various frequencies and positioned in the various spaces between the metal plates according to frequencies. The frequency empolyed for a dielectric waveguide is determined according to a size(a1,b1;a2,b2) of the dielectric waveguide. Circuits having different frequencies are connected via a strip resonator or a lead type resonator for transmitting signals.
Patent KR-20000022639-A (KR)
Inventor: HOSHINO SEICHI
IPC: E04B2/96
Filed: 1999-06-08
Abstract: PURPOSE: A multi-purpose transport container is provided to transport by loading common loads, also to make it possible to transport various kinds of wastes including hydrous wastes. CONSTITUTION: A container is composed of: a container main body(1), a ceiling cover(2) for enabling to open/close, positioned on the upper surface of the main body(1), an upper door(3) positioned at the rear part of the container main body(1) and a lower door(4) for opening downward, positioned at the lower part of the upper door(3). The container enables to take wastes out without polluting an environment by the moisture of hydrous wastes by opening the upper door(3) or taking the wastes out slowly as opening the comparatively narrow lower door(4) by dividing the rear door into up and down.
Patent KR-20010003329-A (KR)
Inventor: KO YEONG HUN
IPC: H02H3/20
Filed: 1999-06-22
Abstract: PURPOSE: A transmission and reception protecting circuit is provided to stabilize a power supply voltage by separating the power supply voltage from a main power. CONSTITUTION: A transmission and reception protecting circuit comprises a signal separating part(216) and a power separating part(220). The power separating part(220) stabilizes a power supply voltage supplied from a power supply part(230). The signal separating part(216) uses +15V and 1GND supplied from the power separating part(220) as an operation voltage. The signal separating part(216) converts an original transmission signal(P-TXD) into an insulated signal, and converts the converted signal into a transmission signal(TXD) to be transferred via a transmission cable. A reception signal(RXD) received through the transmission cable is converted into a reception signal(P-RXD) insulated from the exterior.
Patent KR-20010005138-A (KR)
Inventor: JUNG JAE HEON
IPC: H04B1/40
Filed: 1999-06-30
Abstract: PURPOSE: A method for removing a voice of a multi-layer printed circuit board(PCB) for a wireless terminal is provided to previously prevent a void of an antenna circuit of the multi-layer PCB when the multi-layer PCB is manufactured, so as to improve substrate reliability. CONSTITUTION: Internal-layer circuits(12) having circuit patterns are formed. Resin coated copper foils(RCCs)(30) attached with resins(32) are accumulated on more than one copper clad lamination(CCL)(10) interposed with prepregs(20). The accumulated RCCs(30) are heated and pressurized to make multi layers. A via hole is formed to perform interlayer connection between the heated/pressurized CCL(10) and the RCCs(30). The via hole is plated to form a plated layer through which electricity passes, to carry out the interlayer connection. External-layer circuits(34) having circuit patterns are formed on the RCCs(30). An antenna circuit(50) is formed, not to form the internal-layer circuits(12) on one end of the CCL(10). A gas leakage circuit(40) is formed on one end of the antenna circuit(50) to prevent a void.
Patent KR-20000006580-A (KR)
Inventor: HADANAKAMASANOBU
IPC: B24B37/04
Filed: 1999-06-30
Abstract: PURPOSE: A forming method of semiconductor device is provided to improve flatness according to polishing of silicon oxide layer. CONSTITUTION: The method comprises the steps of: forming polish stop layer(26) having a opening portion, forming a trench(23a ¯ 23d) by etching substrate(21) via the opening portion, forming insulation layer(27) inside of the trench(23a ¯ 23d) and above the substrate(21), supplying first polish slurry to polish surface of the insulation layer(27), simultaneously, polishing a oxide insulation layer using first polish cloth(102) having polish surface of first intensity, continuously, supplying second polish slurry to polish surface of the insulation layer(27), simultaneously, polishing polish surface of the oxide insulation layer(27) using second polish cloth(101) having second intensity lower than the first intensity until polish stop layer(26) is exposed.
Patent KR-20010010283-A (KR)
Inventor: KIM GWANG CHEOL
IPC: H04N5/46
Filed: 1999-07-19
Abstract: PURPOSE: A method for processing sound in a broadcasting system of East Europe is provided to output sound if a screen system of a multi television is a negative modulation system and a voice frequency is for 5.5MHz or 6.5MHz, and to eliminate noise by the off of the sound in different conditions. And the method enables normal sound to be heard though a phase alternating by line(PAL) broadcasting system or a sequential color and memory(SECAM) broadcasting system of East Europe is used. CONSTITUTION: Whether a television is operated is decided by a signal supplied in a power key installed in a remote controller or the television. A signal supplied in a channel selection key installed in the remote controller or the television is received. Whether the received signal is for an East Europe broadcasting system is decided. Whether video of a channel broadcasted according to the signal supplied from the channel selection key is for a negative modulation system is decided. Whether a voice frequency of the channel broadcasted according to the signal supplied from the channel selection key is for 5.5MHz or 6.5MHz is decided. According to decided results, sound is output through a speaker or turned off.
Patent KR-20010017272-A (KR)
Inventor: KIM YEONG DEOK
IPC: F16B39/34
Filed: 1999-08-10
Abstract: PURPOSE: A bolt with a disentanglement preventing spring is provided to guarantee the safe coupling and disentanglement preventing of a structure at low cost, thereby preventing accident of the structure. CONSTITUTION: In a bolt formed with a screw rod(11) forming a screw thread in the outer peripheral surface of the screw rod, and a hexagonal or tetragonal head, the bolt having a disentanglement preventing spring includes the screw rod constructed by forming a spring fixing groove(13) in the front end part, and a coil spring(20) forming a bent and fixed part at a predetermined length in one end of the coil spring for being fixed at the spring fixing groove of the screw rod, and insertedly installed in screw grooves of the screw rod.