baber/WOPTO huggingface dataset:
Patent JP-2007174269-A (JP)
Title: Image processor, processing method and program
Inventor: OMORI SHIRO
IPC: G06T1/00
Filed: 2005-12-22
Abstract: <P>PROBLEM TO BE SOLVED: To detect and process the background region easily.  <P>SOLUTION: In a picture photoed by a television telephone, the size of an object region P is calculated based on the size of a detected face region W on a frame. The object region P has a reverse T-shape consisting of a region P1, and a region P2 wider than the region P1. The region P1 is arranged at an upper portion, and the region P2 is arranged at a lower portion on the picture. The region P1 has a width equal to the width x of the face region W multiplied by a predetermined coefficient a1, and has a height equal to the height y of the face region W multiplied by a coefficient b1. The region P2 has a width equal to the width x multiplied by a coefficient a2, and a height equal to the height y multiplied by (b2-b1).  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2006300314-A (JP)
Title: Fluid-filled cylindrical vibration damper
Inventor: KAWAGUCHI HIROSHI
IPC: F16F13/16
Filed: 2005-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide a fluid-filled cylindrical vibration damper wherein a structure capable of limiting relative displacement quantities in a vertical direction to an axis and an axial direction of an axis member and an outer cylinder member is advantageously realized.  <P>SOLUTION: A pair of fluid chambers 44, 46 are provided across the axial member 12 connected with an outer cylinder member 14 by a rubber elastic body 16, and an orifice forming member 32 for forming an orifice passage 48 for communicating the pair of fluid chambers 44, 46 is provided to be partially positioned in the fluid chambers 44, 46. First stopper mechanisms 50, 34 and second stopper mechanisms 50, 58 for respectively restricting the relative displacement quantities in the axially vertical direction and the axial direction of the axial member 12 and the outer cylinder member 14 are provided in at least one of the pair of fluid chambers 44, 46.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007168372-A (JP)
Title: Image forming device
Inventor: KATO MASAO
IPC: G06F21/31
Filed: 2005-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide an image forming device which can grasp each security level of paper documents without an authentication server.  <P>SOLUTION: This image forming device uses sheets having a built-in RFID tag. The image forming device is equipped with a controlling means 1 which compares the security level of a document and the security level of an individual, and performs a control for recording print information on the RFID tag of the printing document when it is printable.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007170145-A (JP)
Title: Stacked block
Inventor: SAKAMOTO HARUO
IPC: E02B3/14
Filed: 2005-12-26
Abstract: <P>PROBLEM TO BE SOLVED: To provide stacked blocks excelling in working efficiency while improving stability of a wall body after concrete is hardened.  <P>SOLUTION: The stacked block comprises a plate-like front wall part B1 forming the front face of the wall body W; a pair of counterfort parts B2 having almost the same height dimension as the front wall part B1 and extending backward from the front wall part B1; and a connection part B3 connecting the lower end parts of the counterfort parts B2 to each other.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007178257-A (JP)
Title: Measuring device
Inventor: KUWABARA TAKASHI
IPC: G01R27/02
Filed: 2005-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To solve a problem that, in a four terminal measuring device implementing connection check by loading check current to wiring connecting between a measuring device and a test object, since it is required to cutoff a current source so that the measured current does not flow during the connection checking period or to reduce measured current value, constituent becomes complicated.  <P>SOLUTION: A switching means is provided for making or breaking a check current so as to check the connected condition based on voltage difference when check current is applied and not. Therefore, connection check is implemented possibly while applying the measured current and also magnitude of contact resistance can be evaluated.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2006219475-A (JP)
Title: Ocular locally applying preparation
Inventor: KOIKE TETSUHISA
IPC: G02C13/00
Filed: 2005-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide a locally applying preparation improving the wetting property of contact lenses and increasing the amount of tear liquid.  <P>SOLUTION: This ocular locally applying preparation containing (a) alginic acid or its salt and (b) menthol and/or camphor is provided by improving the wetting property of the contact lenses, increasing the amount of the tear liquid and exhibiting an effect of moistening eyes.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2007152333-A (JP)
Title: Liquid coating apparatus
Inventor: KOSAKA YUKIYO
IPC: B05C17/02
Filed: 2005-12-07
Abstract: <P>PROBLEM TO BE SOLVED: To provide a liquid coating apparatus at low cost which can realize very easy replacement, with a new member, of a roller surface part, that is, a member corresponding to a surface material, as a face of coating onto a coating object member, on which a liquid is deposited followed by coating onto the coating object member, and, at the same time, can realize simple stock management of a new surface member.  <P>SOLUTION: The liquid coating apparatus is a roller-type coating apparatus. An arm member 1 formed by bending a continuous rod-shaped or pipe-shaped member to a predetermined shape is provided. One end of the arm member 1 is used as a shaft part 8. A coating roller 3 is pivotably supported on the shaft part 8 so as to rotate the coating roller 3 and restrict the movement in a longitudinal direction. A grip 2 is mounted on the other end. The coating roller 3 is a tape-like roller.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2006511717-A (JP)
Title: 多化学物質の電気化学的処理システム
IPC: H01L21/768
Filed: 2003-12-18
Abstract: 本発明の実施形態は、一般に、単一のメッキプロセスに対して複数の化学物質を与えるように構成された電気化学的処理システムを提供する。これらの複数の化学物質は、一般に、処理システムに位置決めされた個々のメッキセルへ配送される。個々の化学物質は、一般に、バリア層への直接的なメッキ、合金メッキ、薄いシード層へのメッキ、最適な特徴部充填及びバルク充填メッキ、最小限の欠陥を伴うメッキ、及び／又は複数の化学物質を使用して各化学物質の希望の特性の利点を取り入れられる他のメッキプロセス、を遂行するのに使用できる。
Patent JP-2007528693-A (JP)
IPC: C07K1/18
Filed: 2003-07-17
Abstract: Described is a method for the preparation of a mixture of peptides, having an arginine and lysine content of at least 20 w/w %, based on the protein content, from at least one protein source, to a preparation comprising a mixture of arginine- and lysine-rich peptides, comprising at least 20 w/w % arginine and lysine, and to the use of the said preparation as active compound in a medicament, supplement, beverage or food product.
Patent JP-2006511825-A (JP)
Title: 男性受精能アッセイ方法およびデバイス
IPC: G01N21/64
Filed: 2003-12-09
Abstract: 精液サンプル中の前進方向の精子運動性および活動性精子の精子密度をアッセイするための方法およびデバイスが開示される。そのデバイスは、サンプルレザバ、下流収集領域、およびそのサンプルレザバと下流収集領域との間のマイクロチャネルを有する微小流体構造を備える。そのマイクロチャネルは、そのサンプルレザバに配置された精液サンプル中の精子が、そのマイクロチャネルに入り、そのマイクロチャネルに沿って、その収集領域へと向かってその中に移動するように、サンプル精子を、そのチャネル内での一方向の移動に制限するような寸法にされる。
Patent JP-2006513273-A (JP)
Title: ウイルス感染を防止または処置するための組成物および方法
IPC: C12Q1/68
Filed: 2004-01-14
Abstract: 本発明は、複合抗原剤組成物およびウイルス感染を防止するかまたは処置するためのこの使用を提供する。
Patent JP-2006513829-A (JP)
Title: 高周波熱治療用ステント
IPC: A61N1/40
Filed: 2004-02-18
Abstract: 本発明は、超弾性形状記憶合金ワイヤ（２）をお互い異なる位置で交差させながら編んだ中空式円筒状胴体（５）を絶縁材で被覆し、前記胴体の外側中央部位に、別途の超弾性形状記憶合金ワイヤ（１１）をお互い異なる位置で交差させながら編んで形成した中空式円筒状導電胴体（１５）の一端または両端を連結する形の二重構造を持つステントを提供することにより、内腔の狭窄病変部位を拡張させる際にその設置状態を確実に保ち、導電胴体による高周波熱で病変部位を焼灼して壊死させるうえ、前記病変部位の再生による再狭窄を絶縁材で被覆された胴体によって完全に遮断することにその特徴がある。
Patent JP-2006515496-A (JP)
Title: 無線通信システムにおけるネットワーク接続制御装置及び方法
IPC: H04W24/10
Filed: 2004-04-03
Abstract: 本発明は、無線通信システムにおいてネットワークと複数の端末間の上り通信管理装置及び方法に関し、ネットワークが複数の端末の上り通信を制御するための応答条件パラメータをマルチキャストサービスに加入した複数の端末に転送することで行われる。前記端末は、前記応答制御パラメータを所定テストに適用し、前記テスト結果に基づき、端末がネットワークに応答できる場合は、ネットワークに応答メッセージを転送し、ネットワークは、前記パラメータを複数の端末に転送する必要があるか否かと、ネットワークが受信した応答のうち少なくとも一部に基づいてパラメータを更新する必要があるか否かとを推定する。
Patent JP-2006520550-A (JP)
Title: セルラ通信システムにおいて遅延可能データ・サービスを提供する方法および装置
IPC: H04L47/20
Filed: 2004-02-27
Abstract: 通信システム（１００）は、遅延可能データを転送する命令を受信すると、エア・インタフェース（１２８）が輻輳しているか否かを判定し、エア・インタフェースが輻輳している場合、遅延可能データの転送を遅延させるか、または、遅延可能な、より低い優先順位のデータを、より高い優先順位のデータとして転送する。遅延可能データの転送中、エア・インタフェースは輻輳していると通信システムが判定する場合、通信システムは呼を終止させ、遅延されたデータ転送の部分的に完了した状態を保存してもよい。通信システムは呼の終止に続き、エア・インタフェースを通じる別のデータ接続を確立させ、任意の残存する未転送の遅延可能データを転送する。加入者が、より高い優先順位のデータをより低い優先順位のデータとして転送することを阻止するために、さらに通信システムは、より低い優先順位のデータの転送を指定期間に制限し、この指定期間および他の期間に、より高い優先順位のデータの転送を許可してもよい。
Patent JP-2007183135-A (JP)
Title: Method and device for inspecting pattern
Inventor: INOUE HIROSHI
IPC: G01B11/30
Filed: 2006-01-05
Abstract: <P>PROBLEM TO BE SOLVED: To keep the detection capacity of the flaw on a semiconductor pattern even if the line width and pitch of the semiconductor pattern become the wavelength of inspection light or below.  <P>SOLUTION: The pixels of sensor image data 4 are subjected to interpolation processing on reference to the output characteristic data C of a sensor 2 formed on the basis of the respective characteristics of the sensor 2 and a magnifying optical system 3 and a mask restoring filter 20 for acquiring sensor image data 28 acquired by restoring the pattern image formed on a mask 1 from the sensor image data 27 subjected to interpolation processing is provided.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007185035-A (JP)
Title: Disk drive motor
Inventor: TASHIRO TOMOYUKI
IPC: H02K5/167
Filed: 2006-01-06
Abstract: <P>PROBLEM TO BE SOLVED: To provide a disk drive motor capable of driving the rotation highly precisely without causing side-runout, while firmly holding a disk such as a magnetic disk.  <P>SOLUTION: This disk drive motor is provided with a base 1 on which a stator core 2A is fixed, a rotor hub 3 that has a magnet 8 facing the stator core 2A and the outside circumferential portion of which the disk is mounted on, a shaft sleeve 4 fixed to the base 1, and a rotor shaft 5 supported freely rotatably by the shaft sleeve 4. The rotor shaft 5 has a large-diameter portion 5A that is fitted to the shaft sleeve 4 and a small-diameter portion 5B that is fitted to a center hole 3B of the rotor hub. To the small-diameter portion 5B, a flat washer 14 is fitted whose diameter is larger than the large-diameter portion 5A and that has higher hardness than the rotor hub 3. Then, the flat washer 14 is pinched between the rotor hub 3 and the large-diameter portion 5A of the rotor shaft.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007182192-A (JP)
Title: Power controller for hybrid car
Inventor: TANI KEISUKE
IPC: B60L50/16
Filed: 2006-01-10
Abstract: <P>PROBLEM TO BE SOLVED: To provide a power controller for a hybrid car for compensating for the torque output shortage of an engine, which is caused just after the start of an engine with low fuel consumption.  <P>SOLUTION: The present invention relates to a hybrid car which is able to travel by using the power of an engine and a generator motor. A power controller for controlling the power source of the hybrid car is provided with a load suppression judging means for suppressing a supply voltage to an electric load in the case of starting an engine. Then, a power which has become available due to the suppression of a supply voltage is used as the power of the generator motor.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007187761-A (JP)
Title: Self-luminous display, estimated degradation information correction device, input display data correction device, and program
Inventor: OZAWA JUNJI
IPC: G09G3/30
Filed: 2006-01-11
Abstract: <P>PROBLEM TO BE SOLVED: To solve the problem that precision is not guaranteed in suppressing or improving the burn-in of displays.  <P>SOLUTION: One detector sensor is provided for each dummy pixel group at outside the effective display area to continuously control the dummy pixel to emit light at the same gradation level for the input display data of the reference pixel. Then, periodically measuring the light emitted by this dummy pixel, the latest accumulated degradation information is obtained for the measured section. The estimation of the accumulated degradation information calculated for the measured section is corrected, based on this measurement. In result, the burn-in correction value is decided following the actual measurements to increase the reliability.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007188753-A (JP)
Title: Catalyst paste for solid polymer fuel cell
Inventor: TAKAHASHI MITSUTO
IPC: H01M8/10
Filed: 2006-01-13
Abstract: <P>PROBLEM TO BE SOLVED: To provide a paste in which joining performance of an electrolyte membrane with an electrode base material, especially the joining performance with the hydrocarbon based electrolyte membrane in which methanol permeability is made smaller than that of perfluorosulfonic acid based membrane such as Nafion, can be improved.  <P>SOLUTION: This is the catalyst paste for the solid polymer fuel cell which contains (1) catalyst particles, (2) alkoxy silane having ion conductive group or its hydrolysate, and (3) polyether in which alkoxy silyl groups are bonded to both ends of molecular chain via a bond selected from amide bond, urethane bond, and urea bond.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007191867-A (JP)
Title: Sleeper and sleeper connected body
Inventor: ONISHI KUNIAKI
IPC: E01B3/00
Filed: 2006-01-17
Abstract: <P>PROBLEM TO BE SOLVED: To facilitate replacement of fastening members while suppressing the large vertical movement of a rail in regard to a sleeper with the fastening members arranged in positions corresponding to rail fastening parts.  <P>SOLUTION: The sleeper 1 is provided with a body member 10 having storage parts opened on the upper face 10a side, fastening members 11 stored in the storage parts, and presser plates 12. An embedded member 13 is disposed in a space between the fastening member 11 and storage part, and the presser plate 12 is disposed on the upper side of the embedded member 13 to prevent the upward movement of the embedded member 13.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007190999-A (JP)
Title: Marine vessel
Inventor: HIROTA KAZUHIRO
IPC: B63B27/14
Filed: 2006-01-18
Abstract: <P>PROBLEM TO BE SOLVED: To provide a marine vessel capable of shortening the length of a ramp way lifted down from a vessel body side to a quay side, and easily performing loading operation of vehicles even at a harbor having a limit for the length or width of the quay side.  <P>SOLUTION: The marine vessel is equipped with a liquid storage part provided at the lower side than an upper deck 2, a vehicle mounting part 4 provided at the upper side than the upper deck 2, and the ramp way 5 provided at a stern part starboard side and/or a stern part port side. A slope 22 composing a part of the ramp way 5 is formed on the vessel body at the stern part starboard side and/or the stern part port side.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2006110547-A (JP)
Title: Charged filtration membrane and use therefor
Inventor: VAN REIS ROBERT D
IPC: B01D67/00
Filed: 2006-01-24
Abstract: <P>PROBLEM TO BE SOLVED: To improve characteristics of a filtration membrane so that separation speed can be increased without sacrificing membrane selectivity.  <P>SOLUTION: A method of preparing a charged filtration membrane uses an uncharged cellulose membrane which can be modified in a covalently bonded fashion with a reactive charged compound, and the method includes reacting a hydroxyl group on the surface of the uncharged cellulose membrane with a reactive group of the charged compound such that the charged compound is covalently bonded to the uncharged cellulose membrane, wherein the charged compound is projected into a cavity of a pore, wherein the membrane pore size distribution of the charged filtration membrane is reduced relative to that of the uncharged cellulose membrane, wherein, for the charged membrane and a protein solute having like charge, solute sieving is improved by at least 1.5 fold relative to the uncharged membrane, and wherein, for a solution containing the protein solute and a solvent, permeability of the membrane remains substantially the same relative to the uncharged membrane.  <P>COPYRIGHT: (C)2006,JPO&NCIPI
Patent JP-2007202416-A (JP)
Title: Fishing reel
Inventor: TSUTSUMI WATARU
IPC: A01K89/027
Filed: 2006-01-31
Abstract: <P>PROBLEM TO BE SOLVED: To provide a fishing reel which rotates a braking member relatively to a spindle through a bearing and causes a stable braking function.  <P>SOLUTION: The fishing reel has a constitution comprising: a recessed part 1d opening to the front side in the axial direction, an open hole 1e at the center and a bearing engagement recessed part 1g at a stepped part are formed inside a spool 1; the braking member 2, a friction plate 3 and a braking plate 4 are housed in the recessed part 1d; spool bearings 10 and 11 are engaged with the bearing engagement recessed part 1g; the braking member 2 is stopped from rotating by the spool 1; the braking member 2 is pressed by a braking force adjustment knob 6 screwed to the tip part of the spindle 5 inserted into the spool bearings 10 and 11 to regulate a braking force; one side surface of the disklike front part of the braking member 2 is a friction braking surface 2b; the other side surface of the disklike rear part is a spool pressure contact surface 2c; the disklike center has a recessed hole and formed into a bearing supporting part 2d; and a bearing 15 engaged with the spindle 5 is fitted into the bearing supporting part.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007204973-A (JP)
Title: Glove bag installing tool
Inventor: FUKUDA TAKAO
IPC: E04G23/02
Filed: 2006-01-31
Abstract: <P>PROBLEM TO BE SOLVED: To provide a glove bag installing tool for installing a glove bag for removing and isolating a toxic substance such as an asbestos surface.  <P>SOLUTION: This glove bag installing tool 1 has a cylindrical frame 2 of opening mutually opposed surfaces and a support part 3 supporting this cylindrical frame 2. The glove bag installing tool 1 has an installation groove 4 installed by turning a U-shaped opening part in the opening direction of the cylindrical frame 2 to the opening end peripheral edge 2a on one end side of the cylindrical frame 2 and a locking tool 5 detachably fitted to the installation groove 4. The support part 3 is arranged so as to project by the predetermined length to both sides of the cylindrical frame 2. The cylindrical frame 2 is formed in a quadrangular shape in a cross section orthogonal to the opening direction. The locking tool 5 is composed of an elastically deformable construction material, and is formed in a columnar shape in a cross section.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007209113-A (JP)
Title: Motor, and manufacturing and operating method
Inventor: KONDO TOSHINARI
IPC: H02K1/18
Filed: 2006-02-01
Abstract: <P>PROBLEM TO BE SOLVED: To relieve outflow/inflow of flux to the front edge of a pole, thus relieving magnetic saturation at the edge.  <P>SOLUTION: An armature 1 includes an armature core 13 and a winding 14 wound around the armature core. The armature core 13 has: the pole 131 and a winding portion 133 extended in parallel to a rotating shaft; and a joint 132 jointing both of them. The winding 14 is wound around the winding portion 133. The winding portion 133 faces a field element 2 through the pole 131 in a diametrical direction to the rotating shaft. The armature 1 also includes a yoke 11. The yoke 11 magnetically shorts the winding portions 133 each other on the opposite side to the joint 132. The field element 2 has a so-called built-in magnet type structure, a magnetic field core 21, and a magnetic field magnet 22. The magnetic field magnet 22 is built in the magnetic field core 21, thus facing the pole 131 through the magnetic field core 21.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007205920-A (JP)
Title: Multiple reflection type cell, and infrared type gas detector
Inventor: MUTO HIROKI
IPC: G01N21/03
Filed: 2006-02-02
Abstract: <P>PROBLEM TO BE SOLVED: To provide a multiple reflection type cell which is reduced in size while securing a long optical path length enough to be required, and manufactured easily without generating an individual difference and a lot difference, and also to provide an infrared type gas detector which is provided with the multiple reflection type cell, and detects expected gas surely.  <P>SOLUTION: This multiple reflection type cell is constituted to reflect multiply emission light from a light source so as to be get incident into a photodetector, and is arranged opposedly with two parabolic reflectors of focal distance lengths different from each other, under the condition where focal positions thereof are conformed to each other. This infrared type gas detector of the present invention is provided with the multiple reflection type cell.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007204336-A (JP)
Title: Lead free piezoelectric ceramic
Inventor: NONOYAMA TATSUHIKO
IPC: H01G4/12
Filed: 2006-02-03
Abstract: <P>PROBLEM TO BE SOLVED: To provide a lead free piezoelectric ceramic having an excellent denseness, hardly causing an insulation breakdown and comprising an alkali-niobium based compound.  <P>SOLUTION: The lead free piezoelectric ceramic is composed of a polycrystalline substance 1 containing an alkali-niobium based compound represented by a composition formula ABO<SB>3</SB>(A is Li+Na+K, B is Nb, Nb+Ta, Nb+Sb, Nb+Ta or Nb+Ta+Sb and O is oxygen) as a main phase. The polycrystalline substance 1 has a core particle 2 and a shell particle 3 having a different composition from each other within a range of the composition formula ABO<SB>3</SB>as the crystal grains constituting the substance. In the polycrystalline substance 1, core particles 2 and shell particles 3 form a composite particle 4 having a pseudo-core shell structure in which a plurality of shell particles 3 are arranged so as to surround the core particle 2.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007206606-A (JP)
Title: Focus controller, imaging apparatus, and focus control method
Inventor: FUJII SHINICHI
IPC: G02B7/28
Filed: 2006-02-06
Abstract: <P>PROBLEM TO BE SOLVED: To provide technology of performing a focus control at high speed and with high accuracy even under illumination with flickering.  <P>SOLUTION: Before starting AF control, when a flicker frequency (for example, 50Hz or 60Hz) is detected, a frame rate is set to n-times (for example, 200fps or 240fps) as many as the flicker frequency L. Thereafter, by calculating a single AF evaluation value by using n/2 pieces (for example, two) of temporally continuously obtained image data, a plurality of AF evaluation values are calculated. The lens focal position of the focus lens 2a is detected on the basis of the plurality of AF evaluation values. By employing such the constitution, sampling of contrast AF control is performed in a cycle shorter than the flickering cycle.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2007210361-A (JP)
Title: Fish-shaped robot
Inventor: TSUKAMOTO EIHIKO
IPC: B25J5/00
Filed: 2006-02-07
Abstract: <P>PROBLEM TO BE SOLVED: To provide a fish-shaped robot capable of advancing or retracting itself without depending on swinging of a pinna caudalis or a pinna pectorale.  <P>SOLUTION: The fish-shaped robot is constituted so as to be able to swim in the water by swinging a rear part 16 of trunk including the pinna caudalis 17. The inclination in the longitudinal direction is applied to the fish-shaped robot 10 by a gravity center moving mechanism 40. An apparent specific gravity of the fish-shaped robot 10 is adjusted by changing water amount in a float/sink tank 31, and it is constituted so as to be able to advance or retract the fish-shaped robot by making the difference between the buoyant force and a gravity as an impelling force generated thereby without necessarily depending on swinging of the rear part 16 of trunk including the pinna caudalis 17 having a large power consumption.  <P>COPYRIGHT: (C)2007,JPO&INPIT