baber/WOPTO huggingface dataset:
Patent KR-20020051301-A (KR)
Title: A digital orthogonal demodulator with controlled DC offset
Inventor: KIM NAE SU
IPC: H04L27/22
Filed: 2000-12-22
Abstract: PURPOSE: A digital quadrature demodulation device is provided where its DC offset is effectively controlled without increasing a complexity while realizing a hardware. CONSTITUTION: An A/D(Analog/Digital) converter(10) receives a receiving signal, and a matching filter(11) receives an output of the A/D converter. A digital interpolation filter(12) receives an output of the matching filter and an output of a symbol timing recoverer(14). A carrier phase detector(13) receives an output of the digital interpolation filter and an output of a carrier recoverer(15). A signal determination part(16) receives an output of the carrier phase detector, and the symbol timing recoverer receives the output of the carrier phase detector and an output of the signal determination part. The carrier recoverer receives the output of the carrier phase detector and the output of the signal determination part. And a DC offset control part(20) receives a recovery signal and a determination signal(symbol). The DC offset control part comprises a DC offset detector(21) receiving the recovery signal and the determination signal, and a loop filter(22) receiving an output of the DC offset detector, and a D/A converter(23) receiving an output of the loop filter.
Patent KR-20020056420-A (KR)
Title: Structure for engaging burner housing in gas radiation oven range
Inventor: HAN IN HUI
IPC: F24C3/08
Filed: 2000-12-29
Abstract: PURPOSE: A burner housing engagement structure for a gas radiation cooker is provided to engage the burner housing not to be projected to the outer surface, thereby simplifying the engagement structure. CONSTITUTION: A burner housing engagement structure for a gas radiation cooker includes fixtures having a horizontal surface(37) and vertical surface(38) bended at the horizontal surface(37) at both sides of the burner housing, and single-stepped engagement portions(A) having a single-stepped horizontal surface(14) and single-stepped vertical surface to form a certain distance at the both sides of an outer case(10) having an inner space open upward. The vertical surface of the burner housing is disposed in the single-stepped horizontal of the single stepped engagement portion of the outer case to dispose the burner housing at the inner space of the outer case.
Patent KR-20020056704-A (KR)
Inventor: KIM HYANG YUL
IPC: G02F1/1335
Filed: 2000-12-29
Abstract: PURPOSE: A liquid crystal display is provided to prevent light leakage in a bezel opening area and to simplify a light-shielding tape attachment process. CONSTITUTION: A liquid crystal display includes a liquid crystal display panel, upper and lower polarizers(22,23), a back light(40), and a bezel(50). The display panel is constructed in a manner that an array substrate(27) on which a gate line including a gate pad region and a data line including a data pad region are arranged, intersecting each other, and a color filter substrate(11) on which a black matrix(70) and a color filter(15) are formed are attached to each other, having a liquid crystal layer formed between the two substrates. The upper and lower polarizers are respectively attached onto the outer faces of the array substrate and the color filter substrate. The back light is placed under the display panel. The bezel surrounds the edges of the liquid crystal display panel and the back light. The black matrix is extended to the edge of the color filter substrate in an area corresponding to the data pad region, and the part opposite to the data pad region, and the part opposite to the gate pad region. A light-shielding tape is attached to the edge of the array substrate, adjacent to the gate pad region.
Patent KR-20010021895-A (KR)
Title: 사설 전화 시스템에서 인터컴 및 다중 음성 채널을구성하기 위한 시스템 및 방법
IPC: H04W84/16
Filed: 1998-07-07
Abstract: 사설 기지국(26), 및 다수의 표준 셀룰러 단말기(28)를 사용하는 사설 전화 시스템(24) 내에서 인터컴 및 다중 음성 채널 통신을 가능하게 하는 시스템 및 방법이 개시되어 있다. 사설 전화 시스템(24) 내의 2인의 사용자 간의 양방향 인터컴 통신은, 전송 프레임 모두가 각각의 단말기(28)로부터, 그 사이의 통신을 중개하는 사설 기지국(26)에 송신되는 프레임으로서, 우수(偶數) 번호의 TDMA 전송 프레임에 대한 하나의 채널 트랜시버, 및 기수(奇數) 번호의 전송 프레임에 대한 또 하나의 채널 트랜시버의, 두 개의 반비율 채널을 사용하여 용이하게 될 수도 있다. 사설 전화 시스템(24) 내에 다중 음성 채널이 또한 구성되어서, 2인의 사용자는 두 개의 별 개 채널을 통하여 각각의 원격 유선 사용자(18)와 동시적으로 통신할 수 있게 된다.
Patent KR-20010022107-A (KR)
Title: 내인성 유전자 활성화에 의한 에리트로포이에틴의제조방법
IPC: C12N15/10
Filed: 1998-07-22
Abstract: 본 발명은 내인성 사람 에리트로포이에틴 유전자의 활성화로 인해, 사람 에리트로포이에틴(EPO)을 약제 제조물로서 경제적으로 생성시키기에 충분한 양 및 순도로 EPO를 생성시킬 수 있는 사람 세포에 관한 것이다.  본 발명은 또한, 이러한 사람 EPO 생성 세포의 제조방법, 사람 세포에서 내인성 EPO 유전자를 활성화시키기 위한 DNA 구성물, 및 사람 세포에서 EPO를 대량 생성시키는 방법에 관한 것이다.
Patent KR-20010023323-A (KR)
Title: 시트 등받이 설치장비
IPC: A47C7/40
Filed: 1998-08-26
Abstract: 등받이프레임(12)과 베이스프레임을 포함하는 시트 구조체로서, 등받이프레임(12)은 그 대향하는 측면 각각의 하부끝에 인접한 곳에서, 등받이프레임을 베이스프레임에 피봇가능하게 장착될 수 있게 하는 각각의 장착수단(16)에 연결되고, 각각의 장착수단(16)은 각각의 하중분산부재(30)를 포함하며, 등받이프레임(12)은 프레임(12) 및 장착수단(16)의 하중분산부재(30)를 관통하여 프레임에 측면으로 삽입된 패스너(24, 124)에 의해 장착수단(16)에 연결되며, 패스너(24, 124)는 조여지면서 각각의 하중분산부재를 등받이프레임(12)에 의해 형성된 각각의 오목부(36, 136)내로 잡아당기며, 각각의 오목부(36, 136)는, 패스너(24, 124)가 관통하는 각각의 베이스면(32a, 141)과; 대향하는 측면(32b, 132b)을 가지는 하중분산부재(30)에 대해 보완적인 형태를 가지며, 패스너(24, 124)는 등받이프레임(12)을 장착수단(16)에 조일 때, 각각의 하중분산부재(30)가 각각의 오목부(36, 136)내에 클램프되도록 하여, 오목부(36, 136)와 하중분산부재(30)의 각각의 인접하는 측면(23b, 132b)이 가압되어 면대면 접촉을 하게 된다.
Patent KR-20010031477-A (KR)
Title: 전자파 차폐 재료와 차폐 방법
IPC: H01F1/37
Filed: 1998-10-29
Abstract: 본 발명의 전자파 차폐 재료는 자성 입자와 바인더로 이루어진 차폐 복합물로 형성되며, 그 자성 입자는 실질적으로 결정질로서 평균 입경이 약 1000 nm 미만이다.  자성 입자는 Fe 2 O 3 , Fe 3 O 4 , Fe 3 C, 그리고 Fe 7 C 3 으로 형성될 수 있다.  차폐 복합물은 층(500) 또는 복합 입자(600)로 형성될 수 있다.  바인더(504)는 금속 또는 전기 전도성 중합체일 수 있다.  전도성 층(558)은 차폐 복합물에 인접하여 배치될 수 있다.  차폐 재료는 민감한 전자 장치를 보호하도록 사용될 수 있다.  또한, 레이저 열분해에 의해 산화철 입자를 형성하는 방법이 설명되어 있다.
Patent KR-20010032126-A (KR)
Title: 이동 무선단말기의 위치를 결정하는 방법 및 시스템
IPC: H04W64/00
Filed: 1998-11-20
Abstract: 시간분산을 가지는 무선환경에서, 무선 송신기(130)가 반복적으로 전송하였고 또한 다중경로 전파를 겪게 되는 수신 무선신호들읠 특별 처리를 통해, 상기 동일 무선 송신기(130)와 무선 수신기(100) 간의 거리를 보다 정확히 결정하는 방법과 장치를 기술하였다. 수신 무선신호의 도달시간(TOA)은 채널 전력 프로파일(단계 402)을 사용하여 반복적으로 추정한다. 최소 출현 TOA에 가까운 TOA 값이 선택되는데(단계 402), 잡음의 영향을 제거하기 위해, 추정된 TOA 각각은 공지된 비트 시퀀스를 가지는, 무작위적으로 선택된 숫자의 수신 버스트들의 비간섭성 통합으로 구한다(단계 404).
Patent KR-20010033178-A (KR)
Title: Process for the preparation of 6-O-methyl erythromycin A using 9-hydroxy erythromycin derivatives
IPC: C07H17/08
Filed: 1998-11-17
Abstract: The claimed invention provides a novel method of preparing 6-O-methyl erythromycin A. The process comprises the steps of reducing the 9-keto group of erythromycin A to form a 9-hydroxy erythromycin A, protecting the 9-, 2'-, and/or 4''-hydroxyl groups of erythromycin A, selectively methylating the 6-position of the 9-hydroxy erythromycin A derivative, deprotecting the hydroxyl groups and oxidizing the 9-hydroxyl to afford 6-O-methyl erythromycin A.
Patent KR-20010041839-A (KR)
Title: Absorbent structures comprising fluid storage members with improved ability to dewater distribution members
Inventor: SCHMIDT MATTIAS
IPC: A61F13/15
Filed: 1999-03-12
Abstract: The present invention relates to absorbent structures for use in absorbent articles, comprising a first region for distribution of fluid and a second region for storage of fluid. The first region comprises materials, which may have a relatviely high capillary desorption pressure, as the second region comprises materials or members exhibiting a sufficiently high capillary absorption pressure so as to still efficiently drain the first region. Thus, the first region comprises material having a CSDH 50 of more than 40 cm, and said second region comprises material which satisfies at least one of following requirements: (a) an absorption capacity of at least 15 g/g at 35 cm in the capsorption test; and/or (b) an absorption capacity of at least 15 g/g at 0 cm in the capsorption test and an absorption efficiency of at least 55 % at 40 cm; and/or (c) a Capillary Sorption Absorption height at 50 % of is capacity at 0 cm absorption height (CSAH 50) of at least 35 cm in the capsoption test.
Patent KR-20010052898-A (KR)
IPC: H04M1/02
Filed: 1999-06-14
Abstract: A portable phone has an outer casing with opposite upper and lower walls, one of the walls having an opening for access to the interior of the casing, and a lid removably mounted in the opening for normally closing the opening. A main circuit board is mounted in the outer casing, with a plurality of phone components mounted on the circuit board. A predetermined region of the board aligned with the opening is left exposed or empty of components, and forms a recess for receiving a battery. The battery receiving recess has contact pads, and a battery is removably engaged in the recess with battery contacts engaging the contact pads in the recess, whereby the battery can be removed and replaced via the opening after opening the lid.
Patent KR-20020057633-A (KR)
Inventor: KIM IK GEUN
IPC: F25D23/04
Filed: 2001-01-03
Abstract: PURPOSE: A door rack of refrigerator is provided to store common articles as well as cans and to store more articles by improving structure thereof. CONSTITUTION: A door rack(20) includes a story converting device, which is a rotating plate(40), rotatably installed on the door rack and selectively converting the door rack to be single-storied or double-storied by forming one side of the door rack when the door rack is to be single-storied so as to store common articles such as drink bottles and being placed parallel with the door rack when the door rack is to be double-storied so as to store many articles such as cans.
Patent KR-20010078166-A (KR)
Title: A chemical filter and a method for manufacturing the same
Inventor: NAKANO TOSHIRO
IPC: B01D53/04
Filed: 2001-01-30
Abstract: PURPOSE: A chemical filter for restraining pollutant generation from the chemical filter itself is provided to enhance the yield in the production of a semiconductor or a precise electronic part. CONSTITUTION: In a chemical filter having an adsorbing filter medium for removing gaseous impurities or a cohesive organic substance in air, the adsorbing filter medium has a corrugated honeycomb structure comprising a fibrous material and substantially containing no boron oxide.
Patent KR-20010035447-A (KR)
Title: Collapsible monitor that makes it possible to multitask
Inventor: PARK HYUNG SOON
IPC: G06F3/14
Filed: 2001-02-14
Abstract: PURPOSE: The foldable monitor for supporting a multitasking is provided to supply at least one screen of a monitor by providing a sub-monitor for multitasking which is changeable into various sizes and foldable in accordance with a user's need. CONSTITUTION: A main monitor(310) performs a role as a supporting frame and a sub-monitor (320) is connected to the main monitor to be capable of operation. An LCD module sticking and separating unit(500) is connected with the main monitor by a hinge(600) with which the LCD module sticking and separating unit(500) can be moved as an appointed angle to the main monitor.
Patent KR-20020067238-A (KR)
Title: Separation device for rotatable membrane
Inventor: MURAI YUKIO
IPC: B01D63/16
Filed: 2001-02-16
Abstract: PURPOSE: A rotational flat membrane separator which is capable of taking available membrane area as large as possible while suppressing vibration of rotational flat membrane discs due to rotation of the rotational flat membrane discs is provided. CONSTITUTION: In a rotational flat membrane separator comprising a plural hollow rotation shafts(1) that are arranged in such a way that a plural rotational flat membrane discs(2) are mounted on the hollow rotation shafts with the plural rotational flat membrane discs being spaced apart from each other in an equal distance, and the plural rotational flat membrane discs mounted on one hollow rotation shaft are engaged with a plural rotational flat membrane discs mounted on an adjacent hollow rotation shaft with the flat membrane discs of the shafts being spaced apart from each other in an equal distance, the rotational flat membrane separator is characterized in that diameter of collars(3) that are mounted between each of the rotational flat membrane discs(2) mounted on the same rotation shaft(1) is 0.18 to 0.34 of diameter of the rotational flat membrane discs.
Patent KR-20020067817-A (KR)
Title: A Service Method Of Sound Source Distribution For Protected Copyright
Inventor: HONG KENNITH
IPC: G06Q30/02
Filed: 2001-02-19
Abstract: PURPOSE: A method for servicing a sound source protecting the CONSTITUTION: The user downloads a sound source listening program in order to operate a source file inkling the image AD and the additional data together with a music on a user computer(S1). The user receives the member certification by inputting the user information(S2) and searches and requests the sound source(S3). The source file is processed and stored by synthesizing the target AD fit to the registration information of the user and the addition data. The target AD is displayed during the downloading and listening time(S5) and the AD frequency of the sound source is automatically calculated and accumulated to a sound source providing server(S6). IF the user clicks the additional data or the target AD, the target AD is displayed on the user computer or after moving to the linked web site(S7).
Patent KR-20020069806-A (KR)
Inventor: LEE WON JAE
IPC: G06F1/20
Filed: 2001-02-28
Abstract: PURPOSE: A CPU cooler assembly is provided to increase the radiation performance by compactly assembling heat radiation fins in the pin way, to control the pressure by manufacturing a fixation clip through a screw and spring assembly, and to improve the compatibility of the CPU cooler assembly. CONSTITUTION: A radiation unit(10) is composed of many heat radiation fins(11) that are compactly assembled to a plate(12). A spacer(50), which surrounds a core(61) generating the highest heat between the radiation unit and CPU(60), expands a heat area. A fixation unit(80) controls the pressure of the radiation unit placed over the CPU.
Patent KR-20020071063-A (KR)
Inventor: AHN DONG HO
IPC: H01L21/762
Filed: 2001-03-02
Abstract: PURPOSE: A dent free trench isolation structure and method for fabricating the same are provided to prevent a dent generated from an upper edge portion of a trench by using a dent prevention thermal oxide layer for protecting a trench buried insulating material. CONSTITUTION: A trench etch mask is formed on a substrate(100). The trench etch mask has a sidewall and an upper surface. A trench is formed on the substrate by using a trench etch mask. The trench is formed with a sidewall(106a) and a bottom(106b). A trench thermal oxide layer(108) is formed on the sidewall(106a) and the bottom(106b). A nitride liner(110) is formed on the trench thermal oxide layer(108). An upper dent prevention insulating layer(112a) is formed on the nitride liner(110). An upper silicon layer is formed on the nitride liner(110). An insulating material(114) is formed on the upper dent prevention insulating layer(112a). A CMP(Chemical Mechanical Polishing) process is performed by using a pad nitride layer.
Patent KR-20010091943-A (KR)
Inventor: HYODO DOSHIYUKI
IPC: B62H5/00
Filed: 2001-03-09
Abstract: PURPOSE: To prevent mischief to a seat lock mechanism, to prevent mischief to the components in a body cover, and to improve the external appearance of a vehicle having the transparent or semitransparent body cover. CONSTITUTION: This vehicle is provided with right and left body covers 26R, 26L constituting a body cover C, a seat 32 capable of opening or closing an opening part formed with the body covers 26R, 26L, and the seat lock mechanism L provided in the body covers 26R, 26L. The body covers 26R, 26L are formed with a transparent or semitransparent material, and a nontransparent part A blinding the seat lock mechanism L is formed on the left body cover 26L in a range including a recess 26La to hold the grip part 30c of a vehicle body.
Patent KR-20010069367-A (KR)
Title: The green tea meal
Inventor: YOU YEN SIL
IPC: A23L7/10
Filed: 2001-03-14
Abstract: PURPOSE: Provided is cooked rice with green tea water to use excellent nutrition of green tea like vitamins C, B1, B2, niacin, pantothenic acid, inositol, lutin, caffeine, chlorophyll and carotenoid. CONSTITUTION: Green tea leaves or stems are boiled in water at 100deg.C for 2 hours to get green tea extract. Grains like rice, barley, bean and other miscellaneous cereals are mixed in a proper ratio and washed to ready for cooking. The washed grain 60% and the green tea extract 40% are mixed and cooked by higher heat than 100deg.C for 45 minutes. About 80% of vitamin C in the green tea leaves is infused at a first time. Vitamin C in the green tea leaves is very stable and only 20% of vitamin C is reduced when boiling at 95deg.C for 2 hours.
Patent KR-20010095076-A (KR)
Title: Material for positive electrode and secondary baterry
Inventor: KUYAMA JUNJI
IPC: H01M4/134
Filed: 2001-03-29
Abstract: PURPOSE: Provided are a material for positive electrode and a non-aqueous electrolyte secondary battery having an excellent preservation characteristic at a high temperature and charging/discharging cycle characteristic. CONSTITUTION: The non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode contains LixMn2-yMayO4(wherein, Ma is at least one element selected from the group consisting of metal elements other than Mn, and B) and LiNi1-zMbzO2(wherein, Mb is at least one element selected from the group consisting of metal elements other than Ni, and B). The negative electrode contains a material capable of occluding and releasing lithium.
Patent KR-20010091047-A (KR)
Inventor: KOBAYASHI HISASHI
IPC: F27D17/00
Filed: 2001-04-04
Abstract: PURPOSE: A fuel reformer combustion process is provided to improve the efficiency within a furnace, and to reduce the consumption of oxygen and fuel in such furnace. CONSTITUTION: A regenerative furnace(5) without flue gas circulation to the regenerator beds is heated by combusting synthesis gas with an oxidant. The synthesis gas is produced from steam and methane in a first regenerator bed, heated in the previous cycle while a second regenerator bed, cooled in the previous cycle, is heated by passing it through a hot flue gas from a source other than the furnace. Once the first regenerator bed is cooled through the endothermic chemical reaction of the steam and methane, it is heated by hot flue gas, and cooled at hot bed by the reaction of steam and methane.
Patent KR-20010098498-A (KR)
Title: 가이드를 갖는 실린더
IPC: B25B1/18
Filed: 2001-04-11
Abstract: 피스톤(2)과 그 피스톤(2)을 슬라이딩가능하게 수용하는 피스톤실(4)을 갖는 실린더보디(3)를 구비한 실린더에 있어서, 실린더보디(3)의 헤드측 단벽(8)에 피스톤실(4)측으로 연장하는 가이드축(9)을 설치하고, 상기 피스톤(2)은 그 내부에 가이드축(9)이 수용되는 가이드구멍(2c)을 구비한다. 상기 가이드축(9)의 외주면과 상기 가이드구멍(2c)의 내주벽 사이에는 각각 축방향으로 연장하는 복수의 홈(9a, 2d)을 형성하고, 이들 사이에 복수의 강철볼(13)을 설치한다.
Patent KR-20020078930-A (KR)
Title: Wire bonding machine for semiconductor package and forming method of wire using it
Inventor: EUN YEONG HYO
IPC: H01L21/60
Filed: 2001-04-11
Abstract: PURPOSE: A wire bonding apparatus for a semiconductor package and a ball formation method of a wire using the same are provided to easily achieve balls of uniform and small size by forming the ball at the end point of a conductive wire using a laser. CONSTITUTION: The wire bonding apparatus comprises a transducer(13) for transmitting ultrasonic energy, a capillary(14) formed at one end of the transducer for connecting a conductive wire(20) to I/O pads of semiconductor chips and circuit patterns of a substrate, and a ball formation part(15) for forming a ball(21) to one end of the conductive wire(20). The ball formation part(15) further includes a laser output part(15a) for outputting a laser into the one end of the conductive wire(20) and a laser generating part(15b) for applying the laser into the laser output part(15a).
Patent KR-20020081954-A (KR)
Title: Method of managing buffer for supporting HSDPA system dynamic in mobile system
Inventor: LEE YEONG DAE
IPC: H04L12/433
Filed: 2001-04-21
Abstract: PURPOSE: A buffer management method for supporting a mobile communication HSDPA(High Speed Downlink Packet Access) system is provided to efficiently manage buffers in a system in which an RLC(Radio Link Control) buffer and an MAC(Medium Access Control) buffer exists by adding a function associated with the MAC buffer and defining an association relation with the RLC buffer. CONSTITUTION: An RLC layer defines RLC buffer state indicators except for a serial number(VT(S)) of an RLC PDU next transmitted and the fewest serial number(VT(A)) among PDUs which wait for a positive acknowledgement(105). The RLC buffer state indicators are a serial number(VT(MAC_S)) of the RLC PDU including a MAC PDU having the serial number(VT_MAC(S)) of the MAC PDU next initially transmitted, and a serial number(VT(MAC_A)) of the RLC PDU including the MAC PDU having the fewest serial number(VT_MAC(A)) among MAC PDUs in which retransmission is requested. The RLC buffer state indictor is a serial number(VT(MAC_M)) of the RLC PDU including the MAC PDU having a serial number(VT_MAC(M)) of an MAC PDU(Protocol Data Unit) next received from the RLC. The VT(S) value and the VT(A) value are updated through a negative acknowledgement, a positive acknowledgement, and reception-side RLC buffer state information(106). The update method of the VT(S) and the VT(A) differs according to setting information when a wireless connection bearer is set(107). If the difference of the VT_MAC(M) and the VT_MAC(A) is fewer than a threshold value or the difference of the VT_MAC(M) and the VT_MAC(S) is lower than a threshold value, data are additionally requested to the RLC buffer(108). If the difference of the VT(MAC_M) and the VT(MAC_A) is lower than the threshold value or the difference of the VT(MAC_M) and the VT(MAC_S) is fewer than the threshold value, the RLC PDU is transmitted to an MAC layer and the value of the VT(MAC_M) is updated(109).
Patent KR-20020084771-A (KR)
Title: Electrode cleaning apparatus in electric furnace
Inventor: JANG IN HUN
IPC: F27B3/10
Filed: 2001-05-03
Abstract: PURPOSE: An apparatus for cleaning electrode of an electric furnace is provided which prevents damage of pads contacted with the electrode to supply a power source to the electrode by cleaning the outer surface part of the electrode when exchanging the electrode of the electric furnace or adjusting position of the electrode. CONSTITUTION: In an apparatus for cleaning the electrode(110) to prevent damage of pads(140) which support an electrode(110) by a holder(120) opened or closed by being moved from the tip of an arm(130) to a direction getting away from the arm(130) and are mounted on the electrode(110) to supply a power source to the electrode(110), the apparatus for cleaning the electrode of an electric furnace comprises a brush part(20) that consists of rotary brushes(26) and propellers fixed to one side of the brushes(26) so that the brushes(26) are moved toward the electrode(110) by being interlocked with opening and closing actions of the holder(120), the propellers are rotated by receiving high pressure air from a main air supply pipe(42), wherein the brush part(20) is rotationally mounted on the tip of the arm(130), an air supply pipe is installed at one side of the brush part(20) to supply high pressure air toward the propellers, the air supply pipe is connected to a connection pipe(38) by a fitting in such a way that each of the air supply pipe and the connection pipe(38) are freely rotated, the connection pipe(38) is fixed to the holder(120), and the connection pipe(38) is connected to the main air supply pipe(42) through a fitting(40) closing or opening air flow by reciprocal movements of the connection pipe(38) and the main air supply pipe(42).