baber/WOPTO huggingface dataset:
Patent JP-2022106856-A (JP)
Title: Cylindrical heating type tobacco product
IPC: A24F40/42
Filed: 2022-04-27
Abstract: PROBLEM TO BE SOLVED: To provide a smoking article that is filled with an appropriate amount of reconfigured tobacco. 
     SOLUTION: A cylindrical heating type tobacco product is composed of a plurality of sections whose diameter is 5.4 mm to 7.8 mm. The sections includes at least one filter section having a length equal to or longer than 4 mm and equal to or shorter than 8 mm and at least one tobacco section having a length equal to or longer than 8 mm and equal to or shorter than 18 mm. In the case of irradiation with a micro wave having a frequency of 8GHz, the micro wave after transmission through the tobacco section shows a phase change amount of -0.25(rad) to 0.02(rad). 
     SELECTED DRAWING: Figure 3 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2022093479-A (JP)
Title: Information processing device, information processing method, and program
IPC: G06Q50/10
Filed: 2022-04-27
Abstract: PROBLEM TO BE SOLVED: To provide an information processing system, an information processing device, an information processing method, and a recording medium that can seamlessly connect dialogue with agents to communication with people in the real world. 
     SOLUTION: An information processing system includes: a storage unit that stores information on a plurality of agents who each have a different attribute and can dialogue with a user; a communication unit that receives a message from the user from a client terminal and returns a reply message to the client terminal; and a control unit that selects a specific agent from the plurality of agents according to an instruction from the user, records an attribute of the specific agent updated according to dialogue between the specific agent and the user as the attribute of an agent for the user, identifies a partner user who is most similar to the attribute of the agent for the user by comparing the attribute of the agent for the user with attributes of a plurality of existing partner users, and notifies the user of presence of the partner user at predetermined timing. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2023163566-A (JP)
Title: 遊技機
IPC: A63F7/02
Filed: 2022-04-28
Abstract: 【課題】遊技の興趣を向上させることが可能な遊技機を提供する。【解決手段】遊技機１００は、遊技の進行を制御する主制御手段１１０ｍと、前記主制御手段１１ｍからの信号に応じた演出を制御する演出制御手段１３０ｍとを備えている。前記演出制御手段１３０ｍは、表示手段１３１において演出図柄７０ａが第１変動経路で変動する変動演出を行う第１モードと、前記表示手段１３１において演出図柄７０ａが第１変動経路と異なる第２変動経路で変動する変動演出を行う第２モードと、に制御可能である。【選択図】図１９
Patent JP-2022173133-A (JP)
Title: Polyimide film for cover window, and display device comprising the same
Inventor: YUN CHEOL MIN
IPC: C08G73/10
Filed: 2022-05-02
Abstract: To provide a polyimide film for a cover window which is transparent, prevents decline in optical properties, realizes excellent visibility without optical unevenness, and is excellent in heat resistance and mechanical properties.SOLUTION: The polyimide film for a cover window comprises a specific structural unit derived from a dianhydride, and a specific structural unit derived from a diamine. In the film, the thickness is 30-150 μm, the absolute value of the phase difference in the thickness direction at the wavelength of 550 nm is 600 nm or less, and the yellowness index (YI) according to ASTM E313 is 3.5 or less.SELECTED DRAWING: None
Patent JP-2023121105-A (JP)
Title: Integrated gaas active device with improved optical coupling to dielectric waveguides
Inventor: ZHANG CHONG
IPC: G02B6/122
Filed: 2022-05-17
Abstract: To provide an integrated GAAS active device with improved optical coupling to dielectric waveguides.SOLUTION: A device comprises three elements fabricated on a common substrate. A first element includes an active waveguide structure section having at least three lower layers supporting a first optical mode, and a second element has a passive waveguide structure section supporting a second optical mode. A third element, butt-coupled to the first element, has an intermediate waveguide structure section supporting intermediate optical modes. One lower layer in the active waveguide structure section includes an n-type contact layer, another lower layer includes a p-type contact layer, and a third lower layer includes an active region. A tapered waveguide structure section in at least one of the second element and third element facilitates efficient adiabatic transformation between the second optical mode and an intermediate optical mode. No adiabatic transformation occurs between the intermediate optical mode and the first optical mode. Mutual alignments of the three elements are defined using lithographic alignment marks.SELECTED DRAWING: Figure 1
Patent JP-2023173906-A (JP)
Title: プログラム、被写体画像抽出装置、および被写体画像抽出システム
IPC: H04N23/60
Filed: 2022-05-26
Abstract: 【課題】 高速に移動する被写体を撮影して、被写体が好適に写った画像を得ることが可能なプログラム、被写体画像抽出装置、および被写体画像抽出システムを提供する。【解決手段】 撮影手段により連続して取得された各撮影画像を処理して、人物が位置する領域である人物領域を推定する人物領域推定手段２１、前記人物領域を含む座席領域を推定する座席領域推定手段２２、撮影画像における所定の領域である設定領域と、前記座席領域との重複の有無を確認する重複確認手段２３、座席領域と設定領域が重複している場合、前記座席領域と前記設定領域の所定点同士の距離である領域距離を算出する領域距離算出手段２４、座席領域と設定領域が重複する撮影画像が連続する画像群である重複画像群の中から、領域距離が最小となる撮影画像を被写体画像として抽出する被写体画像抽出手段２５、としてコンピュータを機能させるためのプログラム。【選択図】 図２
Patent JP-2023174402-A (JP)
Title: 表示装置
IPC: G09F9/00
Filed: 2022-05-27
Abstract: 【課題】表示装置の組み立て時の作業効率をより向上させる。【解決手段】リブ（１２）は、バックシャーシ（３）の開口部（３１）に挿入され、かつバックシャーシ（３）における開口部（３１）の第１内周縁に接する。フック部（１３）は、バックシャーシ（３）の開口部（３１）に挿入され、かつバックシャーシ（３）における開口部（３１）の第２内周縁に接する。【選択図】図１
Patent JP-2022119945-A (JP)
Title: Optical collimation device and mounting device
IPC: F41G1/387
Filed: 2022-06-01
Abstract: PROBLEM TO BE SOLVED: To provide an optical collimation device that can reduce a user's errors in assembling a mounting system or the complexity of assembly, and to provide a mounting device. 
     SOLUTION: A main scope body 122 has a central axis extending from its first end to its second end, an object lens, an eyepiece part 126 and an erector lens are built into the main scope body, the object lens is placed at a position where a linear distance measured along the central axis is shorter from the first end than from the second end, the eyepiece part stores an eyepiece lens and is placed at a position where the linear distance measured along the central axis is shorter from the second end than from the first end, the erector lens is placed at a position between the object lens and the eyepiece lens and a mount part 148 consists of a composite material and has a rail storage part storing a mount rail 105 and a clamp part for clamping the rail storage part to the mount rail. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2023020894-A (JP)
Title: Camera module and electronic apparatus
Inventor: ZHANG YAOGUO
IPC: G03B5/00
Filed: 2022-06-01
Abstract: To disclose a camera module and an electronic apparatus while relating to technical fields of imaging products.SOLUTION: A camera module includes a base, a lens assembly, a photosensitive component, a driving assembly, and at least two groups of electrode plates. The lens assembly is disposed on the base. The photosensitive component is movably disposed on the base, the driving assembly is disposed on the base and connected to the photosensitive component, and is used for driving the photosensitive component to move on the base. Each group of electrode plates includes a first electrode plate disposed on the lens assembly and a second electrode plate disposed on the photosensitive component. The second electrode plate in each group of electrode plates and the first electrode plate in each group of electrode plates are disposed facing each other in an optical axis direction of the lens assembly to form a capacitor. The camera module and an electronic apparatus according to the embodiments of the present invention are advantageous in not only reducing size of the camera module by omitting an internal space of the camera module, but also reducing cost of the camera module.SELECTED DRAWING: Figure 2
Patent JP-2022111285-A (JP)
Title: Image encoding device, image decoding device, and program
IPC: H04N19/176
Filed: 2022-06-08
Abstract: PROBLEM TO BE SOLVED: To efficiently reduce the code amount of identification information in an intra prediction mode. 
     SOLUTION: An image encoding device (1) encodes each block obtained by dividing an original image for each frame constituting a moving image. An image coding apparatus (1) includes a code amount allocation unit (180) that allocates a code amount to each of a plurality of predetermined intra prediction modes, a mode selection unit (171) that selects an intra prediction mode to be applied to a target block for intra prediction from among the plurality of intra prediction modes, and an encoding unit (130) that encodes identification information indicating the selected intra prediction mode according to the allocated code amount. The code amount allocation unit (180) calculates feature amounts of a plurality of reference pixels adjacent to a target block, and changes a code amount allocation method for the plurality of intra prediction modes on the basis of the calculated feature amounts. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2022126798-A (JP)
Title: Roadside sensing system, traffic control method, traffic control system and computer program
Inventor: WANG KUN
IPC: G08G1/00
Filed: 2022-06-23
Abstract: To provide a roadside sensing system and a traffic control method, which relate to an artificial intelligence technology field such as deep learning and intelligent traffic.SOLUTION: One embodiment of a system comprises a foundation feeding device installed at a target road segment, a roadside computing device, and a roadside sensing device. The foundation feeding device is connected to the roadside computing device and the roadside sensing device. The foundation feeding device is configured to provide foundation feeding to the roadside computing device and the roadside sensing device. The roadside sensing device is configured to acquire roadside sensing information. The roadside computing device is configured to store and process the roadside sensing information so as to acquire sensing result information.SELECTED DRAWING: Figure 1
Patent JP-2023010614-A (JP)
Title: Simulation device for screw-joining simulation of nut runner
Inventor: GERALD NEUMANN
IPC: G01L5/24
Filed: 2022-06-23
Abstract: To provide a simulation device for screw-joining simulation of a nut runner.SOLUTION: The simulation device includes a testing connection element and a brake unit. The testing connection element is firmly connected to the brake unit. A nut runner can connect to the testing connection element and can be operated. The nut runner applies torque to the testing connection element and the torque rotates the testing connection element about a rotation axis. The brake unit can be operated and brakes the testing connection element rotating about the rotation axis. The simulation device includes a torque converter for measuring the torque applied and a rotation angle converter for measuring a rotation angle at which the testing connection element rotates about the rotation axis. The simulation device further includes a null mark, and the brake unit can be adjusted with respect to the null mark at null angle.SELECTED DRAWING: Figure 3
Patent JP-2024004807-A (JP)
Title: 走行ドラムの製造方法及び走行ドラム
IPC: G01M17/02
Filed: 2022-06-29
Abstract: 【課題】タイヤ性能を精度良く試験できる走行ドラムの製造方法及び走行ドラムを提供する。【解決手段】ドラム本体２０に、ドラム周方向に延び且つドラム軸方向に距離を隔てて配置される一対の周方向枠４１と、その一対の周方向枠４１で挟まれてなる成形空間Ｓをドラム周方向に区分する軸方向枠４２と、を含む型枠４を設置する工程と、軸方向枠４２で区分された成形空間に、疑似路面を構成する組成物を充填して硬化させる工程と、を備える。軸方向枠４２の設置箇所が、それぞれ周方向ピッチを異ならせて設定されるとともに、その周方向ピッチの最大値が最小値の２倍未満である。【選択図】図６
Patent JP-2024005605-A (JP)
Title: 船舶を制御するためのシステム及び方法
IPC: B63B79/40
Filed: 2022-06-30
Abstract: 【課題】自動制御により船舶を目標地点に容易に保持することができるシステム及び方法を提供する。【解決手段】システムは、船舶推進器と、入力装置と、コントローラとを備える。入力装置は、操作に応じて選択された第１モードを示す操作信号を出力する。コントローラは、操作信号を受信する。コントローラは、第１モードが選択されているときは、船舶を目標地点に保持するように船舶推進器を制御する。コントローラは、第１モードにおいて、目標地点から離れた第１地点から船舶を目標地点に移動させようとする時には、船首を目標地点に向ける船首モード及び船尾を目標地点に向ける船尾モードのいずれのモードで船舶推進器を制御するかを第１地点に対する目標地点の位置に応じて選択し、選択したモードで船舶を第１地点から目標地点に移動させるように船舶推進器を制御する。【選択図】図４
Patent JP-2024005685-A (JP)
Title: 遊技機
IPC: A63F5/04
Filed: 2022-06-30
Abstract: 【課題】打ち止めに関する報知が単調とならない遊技機を提供する。【解決手段】通常状態や、ＡＴ状態において、打ち止め用ＭＹカウンタ１０３ｂａの値が「１９，０００」に到達すると、スピーカ２９から「打ち止め機能作動中。本日の遊技は終了しました。」という音声が出力される。一方で、ボーナス作動状態において、打ち止め用ＭＹカウンタ１０３ｂａの値が「１９，０００」に到達すると、スピーカ２９から「まもなく打ち止め機能が作動します。」という音声が出力され、ボーナス作動状態が終了すると、スピーカ２９から「打ち止め機能作動中。本日の遊技は終了しました。」という音声が出力される。【選択図】図１４６
Patent JP-2022125156-A (JP)
Title: Anti-glare film and image display device
IPC: G02B5/02
Filed: 2022-07-01
Abstract: PROBLEM TO BE SOLVED: To provide an anti-glare film which has excellent anti-glare property and can suppress reflected scattered light. 
     SOLUTION: An anti-glare film with an anti-glare layer is provided, the anti-glare film has an uneven surface, wherein, for smoothed reflected light intensity measured under given measurement conditions, a maximum difference in the smoothed reflected light intensity between adjacent angles is less than or equal to a predetermined value, and the smoothed reflected light intensity near the specular direction is less than or equal to a predetermined value. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2024010618-A (JP)
Title: 車両の制御装置
IPC: B60W30/045
Filed: 2022-07-12
Abstract: 【課題】車両におけるＮＶの悪化を抑制する。【解決手段】動力源の動作点を変更することによって車両における騒音又は振動を抑制するＮＶ抑制制御の実行中には、車両の旋回時に動力源のトルクを変更することによって車両の挙動を制御する旋回挙動制御の実行が禁止されるので、旋回挙動制御に伴う動力源のトルクの変更つまり動力源の動作点の変更によって、動力源の動作点がＮＶが発生し易い所定の領域に入ってしまうこと、又、ＮＶ抑制制御が適切に行われないこと、が回避される。よって、車両におけるＮＶの悪化を抑制することができる。【選択図】図３
Patent JP-2024010907-A (JP)
Title: 保持部材
IPC: H01L21/683
Filed: 2022-07-13
Abstract: 【課題】対象物を保持する面の均熱性を向上させることができる保持部材を提供する。【解決手段】本開示の一態様は、静電チャック１であって、セラミックス部材１０と、ベース部材２０と、接合層３０と、セラミックス部材１０の下面１２に設けられるＲＴＤ４１と、を有し、ＲＴＤ４１は、充填剤４２により覆われ、Ｘ軸方向やＹ軸方向から見たときに、充填剤４２とベース部材２０の上面２１との間、または、充填剤４２と接合層３０との間には、空間δが設けられている。【選択図】図２
Patent JP-2024011019-A (JP)
Title: 生産管理システムおよび生産管理方法
IPC: H05K13/02
Filed: 2022-07-13
Abstract: 【課題】部品を補給する作業の負荷をより軽減することが可能な基板生産システムを提供する。【解決手段】この基板生産システム３は、部品Ｅを基板Ｐに実装する部品実装装置２０による基板Ｐの生産を管理する生産管理システムであって、基板Ｐの生産前に、部品実装装置２０に部品Ｅを補給する部品補給ルートＲＡを取得するルート取得部３１ａと、基板Ｐの生産前に、部品補給ルートＲＡにより部品実装装置２０に部品Ｅを補給する部品補給周期Ｃ１を取得する部品補給周期取得部３１ｂと、部品補給周期Ｃ１で、部品切れが発生しないように、基板Ｐの生産計画を作成する生産計画作成部５１ａと、を備える。【選択図】図５
Patent JP-2022176962-A (JP)
Title: Fluid device for detection, capture, or removal of disease material
IPC: A61M1/36
Filed: 2022-08-17
Abstract: PROBLEM TO BE SOLVED: To provide a fluid device for detecting, capturing and/or removing disease materials in a biological fluid, and to provide a method for treating/preventing sepsis by using a claimed device. 
     SOLUTION: A fluid device includes at least one inlet to the fluid device, at least one outlet, a multidirectional flow channel which is between the at least one inlet and the at least one outlet and is a multidirectional flow channel including an inner wall, and a ligand for covering at least a portion of the inner wall of the multidirectional flow channel. A useful ligand in executing the invention is selected from the group consisting of an antibody, peptide, protein, antibiotic, polymer, aptamer, ligand, tumor necrosis factor, adhesion receptor, E-selectin, cytokine, chemotherapeutic agent, constant sensing protein or receptor, and binding material containing biological action substance. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2022177070-A (JP)
Title: Conveyance dolly
IPC: B62B5/00
Filed: 2022-09-02
Abstract: PROBLEM TO BE SOLVED: To provide a conveyance dolly whose panels can be set up/folded in a short time, that has a simple structure, and that can be stacked and accommodated on another conveyance dolly. 
     SOLUTION: A conveyance dolly 10 includes: a dolly 50 having a first side frame 51, a second side frame 52, and a connection member 53 for connecting the first side frame 51 and the second side frame 52; and a plurality of panels 11 to 15 provided on the dolly 50. The plurality of panels 11 to 15 includes at least a top panel 11, a front panel 12, a back panel 13, a first side panel 14, and a second side panel 15. The top panel 11 and the front panel 12 each can be opened and closed, the first side panel 14 is fixed to the first side frame 51 so as not to be opened and closed, and the second side panel 15 is fixed to the second side frame 52 so as not to be opened and closed. The back panel 13 is fixed to the dolly 50 so as not to be opened and closed. 
     SELECTED DRAWING: Figure 3 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023157823-A (JP)
Title: Developing device, process cartridge, and image forming apparatus
Inventor: MATSUMOTO KENTARO
IPC: G03G15/08
Filed: 2022-09-14
Abstract: To accurately fix the position of a toner concentration detection sensor with respect to a developing case at a target position.SOLUTION: A developing device 13 is provided with a developing case 13k that forms at least part of conveyance paths B1, B2 of developer G, and a toner concentration detection sensor 13m that detects the concentration of toner in the developer G stored inside a developing device. The developing device is further provided with a projection 13s1 (positioning means) that is fitted to (engaged with) a hole part 13n1 (engagement part) formed in a center part of a sensor main part 13n of the toner concentration detection sensor 13m to fix the position of the sensor main part 13n in the developer case 13k.SELECTED DRAWING: Figure 5
Patent JP-2022180461-A (JP)
Title: Formulation for inhibiting 5-ht2b agonist formation and use methods thereof
IPC: A61K31/36
Filed: 2022-09-15
Abstract: PROBLEM TO BE SOLVED: To provide methods and compositions for using fenfluramine in treatment of diseases and conditions responsive to fenfluramine, which reduce patient's exposure to harmful metabolites while maintaining a therapeutically effective level of fenfluramine. 
     SOLUTION: Drug combinations and uses thereof are disclosed. A first drug is administered in combination with a second drug. The first drug such as fenfluramine is characterized by formation of a metabolite including 5-HT 2B  agonists such as norfenfluramine having known adverse side effects. The second drug is in a form of a CYP inhibitor such as cannabidiol which down regulates the metabolite formation thereby making the first drug safer. 
     SELECTED DRAWING: Figure 2 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023043872-A (JP)
Title: Self-adhesive film, optical member including the same, and optical display device including the same
Inventor: LEE SEUNG HOON
IPC: C09J7/38
Filed: 2022-09-15
Abstract: To provide a self-adhesive film that has both high refractive index and high self-adhesive strength.SOLUTION: Provided are: a self-adhesive film, which is a self-adhesive film obtained by curing a self-adhesive composition that contains a polymer of a monomer mixture containing an aromatic group-containing (meth)acrylic monomer and an inorganic particle having a refractive index of 1.5 or more, and in which the self-adhesive film has a refractive index of 1.55 or more and a storage elastic modulus at 25°C of 0.3 MPa or less; an optical member including the same; and an optical display device including the same.SELECTED DRAWING: None
Patent JP-2022177186-A (JP)
Title: Heat-sensitive recording material
IPC: B41M5/333
Filed: 2022-09-20
Abstract: PROBLEM TO BE SOLVED: To provide a heat-sensitive recording material which is excellent in terms of high-speed printing performance among various performances required for heat-sensitive recording materials, and which is also excellent in terms of printing runnability, oil resistance, solvent barrier properties and the like. 
     SOLUTION: A heat-sensitive recording material has a heat-sensitive recording layer on a supporting body, the heat-sensitive recording layer containing a colorless or pale electron-donating leuco dye and an electron-accepting color developer, while having a protective layer on the heat-sensitive recording layer. The heat-sensitive recording layer contains, as the electron-accepting color developer, at least one urea compound, and the protective layer contains an acrylic resin. 
     SELECTED DRAWING: None 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023111816-A (JP)
Title: Lid body, container with lid body, and combination of lid body and container
Inventor: HAYASHI HIROYOSHI
IPC: B65D77/20
Filed: 2022-09-21
Abstract: To provide a lid body which has excellent re-closability, and a combination of the lid body and a container.SOLUTION: A lid body 1 is so formed for a container with an opening that a joint region, which is joined to an upper end edge part configured from an outer part from an end edge of the opening, can be formed, and comprises a body having a part corresponding to the joint region. The body has: a first part 3 which is determined as a part which is rotated in an upper direction so as to expose the opening in the state that the body is joined to the end edge of the opening of the container; and a second part 4 excluding the first part.SELECTED DRAWING: Figure 1
Patent JP-2022173406-A (JP)
Title: Baked confectionery by which fat is hardly accumulated in body
IPC: A23L33/115
Filed: 2022-09-28
Abstract: PROBLEM TO BE SOLVED: To provide baked confectionery by which fat is hardly accumulated in a body and which promotes fat combustion, since, there has been strong request for providing commodities having fat combustion effects and using various kinds of fats to a market for widening options of consumers, and especially most of baked confectionery has originally, high calorie for easily causing fatness, however baked confectionery has been consumed by a large amount in daily life. 
     SOLUTION: There is provided baked confectionery by which fat is hardly accumulated in a body, the baked confectionery is baked confectionery for promoting fat combustion using as raw material, fat having an iodine value which is 90 or greater. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2022179561-A (JP)
Title: Information processing device, information processing system and information processing method
IPC: G06F3/0484
Filed: 2022-09-28
Abstract: PROBLEM TO BE SOLVED: To enable, when a user is designated, OKR (Objectives and Key Results) components engaged with the user to be displayed in a list form. 
     SOLUTION: A control unit 11 of an information processing device 5 includes a function which, when an input person registers or edits OKR components, provides a user input interface allowing users other than the input person, as sharers of the OKR components, to perform the input, and a function which, when some user is designated, provides a component list screen in which OKR components including the user as one of sharers, are displayed in a list form. Thereby, the information processing device allows a plurality of sharers to be registered for one OKR component, and also allows, when some user is designated, the OKR components including the user as one of sharers, are displayed in a list form. 
     SELECTED DRAWING: Figure 3 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023152292-A (JP)
Title: Joint and pipe structure
Inventor: SAWADA HIROYUKI
IPC: F16L27/113
Filed: 2022-09-29
Abstract: To provide a joint that adjusts a direction of a pipe conduit, and into which a cable or the like is easily inserted, and a pipe structure.SOLUTION: A joint 30 is a tubular joint 30 that extends along a linear pipe axis X. The joint 30 has a first socket 31 into which a first protection pipe 10 is fitted at one end 31a, a first spigot 32 into which a second protection pipe 20 is fitted at the other end 32a, and an intermediate part 33 between the first socket 31 and the first spigot 32. The first socket 31 has a socket enlarged diameter part 35 that increases in diameter from one end 31a toward the other end 32a. The first spigot 32 has a uniform annular cross section along a pipe axis X. A minimum inner diameter of the first socket 31 is larger than an outer diameter of the first spigot 32. A minimum inner diameter of the intermediate part 33 is smaller than the outer diameter of the first spigot 32.SELECTED DRAWING: Figure 5