baber/WOPTO huggingface dataset:
Patent JP-2021140135-A (JP)
Title: Fixing device
Inventor: TATEZAWA HIDEKAZU
IPC: G03G15/20
Filed: 2020-11-10
Abstract: To provide a fixing device capable of enhancing the stability of a belt surface on the downstream side from a nip part even when using a steering roller.SOLUTION: A fixing pad 320 is arranged inside the fixing belt 310; a rotatable pressure roller 330 presses a fixing pad 320 through the fixing belt 310 to form a nip part N for sandwiching and conveying a recording material; an auxiliary drive roller 340 provided on the downstream side of the nip part N inside the fixing belt 310 applies a drive force to the fixing belt 310; motors M0 and M1 apply a drive force to each of the pressure roller 330 and the auxiliary drive roller 340 so that the peripheral speed of the auxiliary drive roller 340 is larger than that of the pressure roller 330; and a steering roller 350 for controlling a position of the fixing belt 310 in the width direction is provided on the downstream side of the auxiliary drive roller 340 and on the upstream side of the fixing pad 320.SELECTED DRAWING: Figure 8
Patent JP-2022076882-A (JP)
Title: Particulate material and production method and use thereof
Inventor: HABASAKI HIROKI
IPC: H01M4/90
Filed: 2020-11-10
Abstract: To provide a material having an oxy-hydroxide and a spinel-type oxide differing in crystal structure which are combined in a nanosize area, and also to provide an air electrode catalyst, a metal-air secondary battery air electrode, and a metal-air secondary battery which use the material.SOLUTION: A particulate material comprises in one particle: a metal-oxy-hydroxide particle mass containing Co, Ni, and Fe having a particle diameter within a range of 1 to 100nm; and a spinel-type metal-oxide particle mass containing Co, Ni, and Fe having a particle diameter within a range of 1 to 100nm. A production method of a particulate material comprises firing a precursor containing a layered double hydroxide containing Co, Ni, and Fe and containing a metal hydroxide containing Co, Ni, and Fe to obtain the particulate material. An air electrode catalyst and a metal-air secondary battery air electrode comprise the particulate material. A metal-air secondary battery comprises: an air electrode containing the particulate material; a negative electrode containing a negative electrode active material; and an electrolyte interposed between the air electrode and the negative electrode.SELECTED DRAWING: Figure 13-1
Patent JP-2022078735-A (JP)
Title: Image processing device, image processing program, image recognition device, image recognition program, and image recognition system
Inventor: LEI XU YING
IPC: H04N19/126
Filed: 2020-11-13
Abstract: To provide an image processing device, an image processing program, an image recognition device, an image recognition program and an image recognition system for improving the processing efficiency of image recognition processing.SOLUTION: A learning unit executes learning processing of updating model parameters of an encoder and a decoder so as to reduce a recognition error. A feature amount encoding unit 402 encodes a plurality of feature amounts of image data by using the encoder that has been applied with the learning processing. A Q value decision unit 403 decides accuracy of quantization on the basis of information indicating a requested data amount. A quantization unit 404 performs quantization on the plurality of encoded feature amounts on the basis of the decided accuracy of quantization.SELECTED DRAWING: Figure 4
Patent JP-2022081805-A (JP)
Title: Optimum route setting device and optimum route setting program
Inventor: KAWACHI HIROFUMI
IPC: G08G1/0968
Filed: 2020-11-20
Abstract: To retrieve an optimum route for efficiently circulating plural visiting spots for several days.SOLUTION: An optimum route setting device includes: means for receiving input of position information of a starting place and a final destination and position information of each of plural visiting spots (visiting condition setting task 151); means for receiving input of each attribute of visiting spots (attribute classification setting task 152); means for receiving input of a circulation time as the longest time per day for circulating visiting spots and a responsible person's driving level for circulating visiting spots (circulation condition setting task 153); means for receiving input of a road situation regarding a circulation district (road situation setting task 154); and means for obtaining a daily route in which a total required time for circulation by circulating each group in which visiting spots are classified following each attribute of the visiting spots is minimized with arrival at the final destination within the circulation time after starting a day's circulation from the starting place when visiting all of the visiting spots for several days as a restriction condition (route retrieval task 155).SELECTED DRAWING: Figure 1
Patent JP-2022013572-A (JP)
Title: High capacity-type lithium battery cover plate with minimal shoulder height
Inventor: WANG WENLIN
IPC: H01M50/172
Filed: 2020-11-20
Abstract: To provide a high capacity-type lithium battery cover plate capable of further improving the height of a battery shell under conditions where the total height of a battery is determined, thereby increasing the capacity of a battery effective space.SOLUTION: A high capacity-type lithium battery cover plate with a minimal shoulder height is a lithium battery cover plate that includes a cover plate body 1 provided with two electrode penetration holes. In the lithium battery cover plate, two electrode pressure plates are connected to the two electrode penetration holes, respectively, in an insulation mode, a lower insulation pad 4 is connected to a lower part of the cover plate body, and two electrode coupling sheets 5 located below the lower insulation pad are in electrical contact with the two electrode pressure plates 3, respectively, through the electrode penetration holes corresponding to them. The lithium battery cover plate is characterized in that a bottom edge part 6 that sinks and turns inward is provided at a lower part of each electrode penetration hole and the height position of the bottom edge part is lower than the bottom position of the cover plate body to form a sunken installation space for the electrode pressure plates.SELECTED DRAWING: Figure 3
Patent JP-2022083761-A (JP)
Title: Information processing system
Inventor: TSUBOUCHI SHIGETAKA
IPC: G06K7/14
Filed: 2020-11-25
Abstract: To provide an information processing system capable of preventing information of a manager side from being disclosed to a consumer and simply showing information desired by the consumer.SOLUTION: An article information processing system using a code including a first area that changes according to a change in an external environment and a second area including an information area with article identification information recorded includes: a first input device 710 for transmitting change information of the first area and the article identification information and the like of the second area to an information processing device 100; and a second input device 720 for reading the article identification information of the second area, and transmitting the read information and the like to the information processing device 100. The respective input devices are located on a distribution route for an article provided with the code. The information processing device 100 transmits management information from the first area and the second area to a first output device 810 in receiving the information from the first input device 710, and transmits only a portion of the information to be outputted to the first output device 810 to a second output device 820 in receiving the information from the second input device 720.SELECTED DRAWING: Figure 10
Patent JP-2022084036-A (JP)
Title: Fastening/loosening device for rail-holding bolt
Inventor: SAKAMOTO AKIRA
IPC: E01B29/28
Filed: 2020-11-26
Abstract: To miniaturize a fastening/loosening device for a rail-holding bolt of a track, to facilitate handling and to reduce cost.SOLUTION: A fastening/loosening device of this invention relates to an improvement of the fastening/loosening device for rail holding bolts in which impact wrenches 36 for fastening and loosening operation of rail holding bolts 104 on the left and right sides of a rail 102 is distributed to both right and left sides of the rail 102 and attached so as to be vertically slidable, on a truck frame 6 mounted on a single rail 102 so as to be movable along the track via wheels 7a, 7b. A handle 36b of the impact wrench itself provided with an operation part 42 for performing the operation of starting and stopping the impact wrench 36 is projected to the rear side of a machine body 1 and is constituted so as to be used also as the handle for machine body operation including the moving operation of the machine body 1. A wrench unit 4 is formed by combining the impact wrench 36 and a housing 41 provided with a wrench shaft 38 for fastening and loosening the bolt 104 by connecting the impact wrench 36.SELECTED DRAWING: Figure 1
Patent JP-2022085371-A (JP)
Title: Welding quality evaluation method and welding equipment
Inventor: MORIHIRA NAOKI
IPC: B23K9/095
Filed: 2020-11-27
Abstract: To provide a welding quality evaluation method which enables welding defect to be detected on site during groove welding between metal members, and welding equipment comprising mechanism for evaluating the welding quality.SOLUTION: A welding quality evaluation method according to the present invention is a method for evaluating the quality of groove welding during welding and comprising: a welding region image acquisition step of acquiring observation image data of an edge of a molten pool of a prescribed region on the rear side in the welding advancing direction with respect to the edge of the groove and the welding heat input point; a penetration size calculation step of calculating penetration size data from a positional relationship between the edge of the molten pool of the prescribed region in the observation image data and the extension line of the edge of the groove; a bead shape calculation step of calculating a predicted bead shape by comparing the calculated penetration size data with bead shape data accumulated beforehand by machine learning; and a welding defect determination step of determining the presence/absence of occurrence of a welding defect by comparing the predicted bead shape with a prescribed threshold.SELECTED DRAWING: Figure 1
Patent JP-2022090569-A (JP)
Title: washing machine
Inventor: NIIMURA MITSUNORI
IPC: D06F39/08
Filed: 2020-12-07
Abstract: To provide a washing machine in which a rotary vane does not corotate by the rotation of a pumping vane.SOLUTION: A fully automatic washing machine includes: a washing and dewatering tub arranged rotatably in an outer tub; a rotary vane arranged rotatably at a bottom part of the washing and dewatering tub; a pumping vane arranged rotatably between a bottom wall of the washing and dewatering tub and the rotary vane; a pumping passage which is provided on a side wall of the washing and dewatering tub, and in which water supplied by the rotation of the pumping vane flows; a discharge port where the water which has flowed in the pumping passage is discharged to the inside of the washing and dewatering tub; and a drive part for driving the washing and dewatering tub, the rotary vane, and the pumping vane. The drive part includes: a drive motor; a switching part 800a for performing switching between a first drive mode in which the rotation of the drive motor is transmitted to the rotary vane and the pumping vane, and a second drive mode in which the rotation of the drive motor is not transmitted to the rotary vane but is transmitted to the pumping vane; and a restriction part 800b for restricting the rotation of the rotary vane in the second drive mode.SELECTED DRAWING: Figure 5
Patent JP-2022091412-A (JP)
Title: Genre-based text collection device and program thereof
Inventor: MISHIMA TAKESHI
IPC: G06F16/30
Filed: 2020-12-09
Abstract: To provide a genre-based text collection device capable of accurately collecting a large amount of genre-based text data.SOLUTION: A genre-based text collection device 1 includes: broadcast receiving means 10 that receives and demodulates a digital broadcast; subtitle information extraction means 110 that extracts subtitle information including subtitle text and time information to present subtitle text from demodulated signals; EPG information extraction means 111 that extracts EPG information of a broadcast program from the demodulated signals; program information identification means 13 that identifies time information and genre of the broadcast program from the EPG information; text extraction means 14 that extracts subtitle text of a time section specified by the time information of the broadcast program from the subtitle information and converts it into genre-based text in association with the genre of the broadcast program.SELECTED DRAWING: Figure 1
Patent JP-2022092917-A (JP)
Title: Information processing apparatus, information processing method, and program
Inventor: NARUMI Yuki
IPC: G06V30/14
Filed: 2020-12-11
Abstract: To improve character recognition accuracy for originally a series of handwritten characters that are discontinuously described.SOLUTION: An information processing apparatus separates an image area corresponding to handwritten characters from a document image obtained by scanning a document, and extracts a character block consisting of characters having the same base line. When a plurality of character blocks are extracted, the information processing apparatus combines the character blocks with each other to create a single character block based on the positional relationship between the plurality of character blocks.SELECTED DRAWING: Figure 12
Patent JP-2022093946-A (JP)
Title: catheter
Inventor: SHIRAISHI TATSUYA
IPC: A61M25/00
Filed: 2020-12-14
Abstract: To provide a catheter capable of sufficiently and reliably generating a propulsion force even in a case of strongly pressing in a hollow shaft or making the hollow shaft pass through a curved body cavity.SOLUTION: A catheter 1 comprises a hollow shaft 11 which has a slit 11s formed extending spirally along a longitudinal direction. Faces opposed to each other across the slit 11s are a first face 111 and a second face 112, which are capable of being in contact with or separated from each other. In a state where the first face 111 and the second face 112 are in contact with each other, the hollow shaft 11 has a recess m1 located radially outside of a contact part 11b of the first face 111 and the second face 112 and opening radially outward.SELECTED DRAWING: Figure 2
Patent JP-2022095001-A (JP)
Title: Microplate
Inventor: OKAMOTO REIKO
IPC: C12M3/00
Filed: 2020-12-16
Abstract: To provide a microplate in which cells are easily aggregated in wells, and a cell mass is easily formed.SOLUTION: A microplate 1 having a plurality of wells 14, where a bottom face 16 of wells 14 is a concave surface recessed downward, a low adhesive coating film made of cell adhesion inhibitor is formed on the bottom face 16, and when the radius of the bottom face 16 of the wells 14 is R(mm) in a plan view of the wells 14, a surface roughness Ra of the surface of the low adhesive coating film within a circular region of a radius r (note that r=0.4×R) having the center of the bottom face 16 of wells 14 as a center is 0.1 μm or less.SELECTED DRAWING: Figure 2
Patent JP-2022095435-A (JP)
Title: Oil pump
Inventor: OSAKI RYOSUKE
IPC: F04F5/10
Filed: 2020-12-16
Abstract: To provide an oil pump which can be operated with small power.SOLUTION: An oil pump (20) includes: a pump body (22) which is rotatably provided at a housing (21) and rotates to circulate an oil; an oil suction passage (31) which extends from the exterior of the housing (21) to the pump body (22) and in which the oil flows; an oil discharge passage (32) which extends from the pump body (22) to the exterior of the housing (21) and in which the discharged oil flows; and a jet pump (24) which suctions the oil that has passed through a cooling component cooled by the oil and can suction the oil from the exterior by a negative pressure generated by the suctioned oil.SELECTED DRAWING: Figure 1
Patent JP-2022096222-A (JP)
Title: Random number generation program and random number generation method
Inventor: TAMIYA YUTAKA
IPC: G09C1/00
Filed: 2020-12-17
Abstract: To generate random numbers with a low cross correlation between random number sequences.SOLUTION: A random number generation device 100 generates a second seed list having a new seed for each new random number sequence on the basis of a first seed list having a seed for each random number sequence regarding a plurality of random number sequences with a predetermined length. The random number generation device 100 generates a random number with a predetermined length for each new random number sequence on the basis of the seed included in the second seed list. The random number generation device 100 determines whether or not the generated random number with the predetermined length matches the seed in the second seed list. The random number generation device 100 repeatedly performs processing for generating the second seed list until the random number with the predetermined length does not match the seed in the second seed list.SELECTED DRAWING: Figure 1
Patent JP-2022099498-A (JP)
Title: Motor control circuit for watch, movement, electronic watch, and method for controlling electronic watch
Inventor: OKUHATA TOMOKI
IPC: H02P8/02
Filed: 2020-12-23
Abstract: To provide a motor control circuit for a watch that can execute fast-forward drive of a motor even during the detection of an external magnetic field, a movement, an electronic watch, and a method for controlling an electronic watch.SOLUTION: A motor control circuit for a watch comprises: a driver that is controlled to an on-state for supplying a driving current to a coil of a motor and an off-state for not supplying the driving current; a current detection unit that detects a value of current flowing in the coil; a target current value setting unit that sets a target current value; a driver control unit that compares the current value detected by the current detection unit with the target current value, and controls the driver to the on-state or the off-state according to a result of the comparison; a polarity switching unit that alternately switches a polarity of the driving current to a first polarity and a second polarity; and an external magnetic field detection unit that detects an external magnetic field. When the external magnetic filed detection unit detects the external magnetic field, the target current value setting unit changes the target current value.SELECTED DRAWING: Figure 4
Patent JP-2022100774-A (JP)
Title: Parking support device
Inventor: NAKAGAWA TAKUYA
IPC: G08G1/16
Filed: 2020-12-24
Abstract: To provide a parking support device which can change the number of times a vehicle stops during parking support control according to a peripheral situation of the vehicle.SOLUTION: A parking support device comprises: an information acquisition device for acquiring vehicle peripheral information including information about an object existing in the periphery of a parked vehicle (SV); and a control unit which is configured to execute parking support control to make the vehicle move along a moving path (MP). The control unit changes the number of times the vehicle stops while it is moving along the moving path on the basis of the vehicle peripheral information.SELECTED DRAWING: Figure 8
Patent JP-2020527746-A (JP)
Title: マルチポイント音場記述を使用して拡張音場記述または修正音場記述を生成するためのコンセプト
IPC: G10L19/008
Filed: 2018-07-13
Abstract: 拡張音場記述を生成するための装置であって、少なくとも１つの基準位置についての音場を示す少なくとも１つの音場記述を生成するための音場生成器（１００、２５０、２６０）と、音場の空間情報に関連するメタデータを生成するためのメタデータ生成器（１１０）と、を含み、少なくとも１つの音場記述およびメタデータは、拡張音場記述を構成する。少なくとも１つの音場記述は、特定の場合には、少なくとも１つの基準位置に関係する第１の音場記述と、基準位置とは異なるさらなる基準位置に関係する第２の音場記述と、を含み、空間情報に関連するメタデータは、基準位置とさらなる基準位置、または両方の基準位置の一方、および両方の基準位置の間に延在するベクトルを示す。
Patent JP-2020529411-A (JP)
Title: 第三世代ｅｇｆｒチロシンキナーゼ阻害剤とｒａｆ阻害剤の治療用組合せ
IPC: A61K45/06
Filed: 2018-08-01
Abstract: 本発明は、特に、癌、特に肺癌の治療に使用するための、（ａ）第三世代ＥＧＦＲチロシンキナーゼ阻害剤及び（ｂ）Ｒａｆ阻害剤を含む組合せ製剤に関する。本発明は、癌の治療のための医薬品の調製のためのそのような組合せの使用；癌の治療を必要とする対象に、共同で治療上有効な量の前記組合せを投与することを含む、前記対象の癌を治療する方法；そのような組合せ及びその商業的包装を含む医薬組成物にも関する。
Patent JP-2020531116-A (JP)
Title: 送達ワイヤ組立体及びインプラントを含むインプラントシステム
IPC: A61M25/00
Filed: 2018-08-17
Abstract: インプラントシステムが提供され、雌型分離機構構成要素を有する送達ワイヤ組立体と、雄型分離機構構成要素を有するインプラントと、を含み、雌型分離機構構成要素は、雄型分離機構構成要素が雌型分離機構構成要素に取り付け可能であるように、雄型分離機構構成要素を受容するように構成されたコイルを含む。【選択図】図１
Patent JP-2020531653-A (JP)
Title: 新規な（パー）フルオロポリエーテルポリマー及びその使用
IPC: C08G65/333
Filed: 2018-07-30
Abstract: 本発明は、新規な（パー）フルオロポリエーテル（ＰＦＰＥ）ポリマー、それらの製造方法、及びコーティング組成物における添加剤としてのそれらの使用に関する。【選択図】なし
Patent JP-2020534996-A (JP)
Title: シラン官能化エチレン系ポリマーの湿気硬化のためのスズ系触媒および二酸化チタンを含む組成物
IPC: C08K3/22
Filed: 2018-09-25
Abstract: スズ系触媒、例えばジブチルスズジラウレートを使用したシラン官能化エチレン系ポリマーの硬化プロセスが、酸化チタン（ＩＶ）の添加により加速される。【選択図】なし
Patent JP-2020536442-A (JP)
Title: コアネットワークノードのための方法、ｕｅのための方法、コアネットワークノード、及びｕｅ
IPC: H04W28/24
Filed: 2019-08-22
Abstract: コアネットワークノードのための方法は、ユーザ機器（ＵＥ）（３００）へ、少なくとも１つのoperator-defined access category definitionsを含むREGISTRATION ACCEPTメッセージを送信することであって、少なくとも１つのoperator-defined access category definitionsを含むことは、ＵＥにREGISTRATION COMPLETEメッセージを送らせる、送信することと、ＵＥ（３００）から、少なくとも１つのoperator-defined access category definitionsの肯定応答受信を示すREGISTRATION COMPLETEメッセージを受信することとを含む。【選択図】図１
Patent JP-2020537850-A (JP)
Title: バイナリ情報を送信するための送信機、ネットワークノード、方法およびコンピュータプログラム
IPC: H04W52/04
Filed: 2018-09-26
Abstract: 送信機は、情報シンボルが、第１の電力状態と第２の電力状態とを含む信号によって表される、バイナリ振幅シフトキーイングを使用して、バイナリ情報を送信するように構成される。第１の電力状態は、第２の電力状態よりも高い信号電力を有する。第１および第２の電力状態の間の電力における比は第１の値を下回る。第１および第２の電力状態の間の電力における比は、状態が区別可能に復号可能であるように、第２の値を上回る。そのような送信機を備えるネットワークノード、対応する方法、およびその方法を送信機において実装するためのコンピュータプログラムも開示されている。【選択図】図５
Patent JP-2020526230-A (JP)
Title: 新規微生物バイオマスに基づく飼料製品
IPC: A23K10/16
Filed: 2018-07-02
Abstract: 水生飼料、動物飼料及びその他の食品の製品と並んで、栄養学的化合物及び薬学的化合物、化学物質、並びに生体材料は、微生物の発酵によって商業規模で生産され得る重要な商品である。本発明は、この目的のため特別に選択された微生物細胞の共同体を水性培養培地で培養することにより、二酸化炭素、水素、及び酸素等の単純なガス供給原料からこれらの価値のある多炭素化合物を生産する方法を提供する。この培養のための工業廃ガス等の安価な原料を活用することに加えて、本明細書に記載されるプラットフォームは、除去されなければ地球規模の気候変動に寄与するであろう二酸化炭素及びその他の廃ガスを、工業排出物から除去するという利点も提供する。さらに、微生物共同体の培養は、飼料ブレンドに、単一培養では利用することができない栄養価の高い成分を提供することができる。 【選択図】図２
Patent JP-2021501977-A (JP)
Title: 負極活物質、前記負極活物質を含む負極、及び前記負極を含む二次電池
IPC: H01M4/36
Filed: 2018-11-09
Abstract: 本発明は、複数のナノ粒子を含む炭素質マトリックスを含んでなり、前記ナノ粒子は、シリコンコアと、前記シリコンコア上に配置されてＳｉＯｘ（０＜ｘ≦２）を含む酸化膜層と、前記酸化膜層の表面の少なくとも一部を覆ってＬｉＦを含むコーティング層とを含む負極活物質に関する。
Patent JP-2021505930-A (JP)
Title: オートフォーカス及び光学式手ぶれ補正機構を備える光学デバイス、特にカメラ
IPC: G03B5/00
Filed: 2018-11-22
Abstract: 本発明は、光学デバイス（１）であって、調整可能な焦点距離を有するレンズ（２）と、このレンズ（２）の焦点距離を調整するため、及びレンズ（２）を用いて光学デバイス（１）により生成される像を安定化するための４つのアクチュエータ（３）とを備える光学デバイス（１）に関する。本発明によれば、各アクチュエータ（３）は、上記焦点距離を調整するための電気伝導性の第１コイル（３０１）及び上記像を安定化するための第２の電気伝導性コイル（３０２）を備え、上記第１コイル（３０１）は、直列に接続されており、光学デバイス（１）は、上記焦点距離を調整するために、第１電流（Ｉ１）を第１コイル（３０１）に印加するように構成されており、上記像を安定化するために、光学デバイス（１）は、第２電流（Ｉ２）を第２コイル（３０２）の第１対（３１）に、及び第３電流（Ｉ３）を第２コイル（３０２）の第２対（３２）に印加するように構成されている。【選択図】図１
Patent JP-2021510181-A (JP)
Title: 電磁鋼板接着コーティング組成物、電磁鋼板製品、およびその製造方法
IPC: C09J11/04
Filed: 2018-12-17
Abstract: 【課題】電磁鋼板接着コーティング組成物および電磁鋼板製品を提供する。【解決手段】本発明による電磁鋼板接着コーティング組成物は、全体固形分１００重量％を基準にして、平均粒径が１０〜３００ｎｍである樹脂を２０〜４０重量％、樹脂と結合された無機ナノ粒子を１０〜３５重量％、金属リン酸塩を１０〜３０重量％、およびリン酸を１０〜４０重量％を含む。本発明による電磁鋼板製品は、複数の電磁鋼板および複数の電磁鋼板の間に位置する接着層を含み、接着層はＡｌ、Ｍｇ、Ｃａ、Ｃｏ、Ｚｎ、Ｚｒ、およびＦｅのうちの１種以上の金属を０．５〜３０重量％、Ｎを０．１〜１０重量％、Ｃを０．１〜５重量％、Ｐを１〜３０重量％、ＳｉおよびＴｉのうちの１種以上の金属を１０〜３０重量％含み、残りはＯからなる。【選択図】図１
Patent JP-2021509446-A (JP)
Title: 圧力容器用鋼材及びその製造方法
IPC: C22C38/00
Filed: 2018-12-24
Abstract: 【課題】圧力容器用鋼材及びその製造方法を提供する。【解決手段】本発明の鋼材は、Ｃ：０．０６〜０．２５％、Ｓｉ：０．０５〜０．５０％、Ｍｎ：１．０〜２．０％、Ａｌ：０．００５〜０．４０％、Ｐ：０．０１０％以下、Ｓ：０．００１０％以下、Ｎｂ：０．００１〜０．０３％、Ｖ：０．００１〜０．０３％、Ｔｉ：０．００１〜０．０３％、Ｃｒ：０．０１〜０．２０％、Ｍｏ：０．０５〜０．１５％、Ｃｕ：０．０１〜０．５０％、Ｎｉ：０．０５〜０．５０％、Ｍｇ：０．０００５〜０．００５０％、Ｃａ：０．０００５〜０．００５０％、Ｏ：０．００２０％以下、残部Ｆｅ、及びその他の不可避不純物からなり、微細組織が面積分率で３０％以下のパーライト及び残部フェライトを含み、非金属介在物が、Ｍｇ−Ａｌ−Ｃａ−Ｏの複合酸化物を含有することを特徴とする。【選択図】図１