JP2004148592A - Article to which thermoplastic resin molding is welded and method for producing article - Google Patents

Article to which thermoplastic resin molding is welded and method for producing article Download PDF

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Publication number
JP2004148592A
JP2004148592A JP2002314548A JP2002314548A JP2004148592A JP 2004148592 A JP2004148592 A JP 2004148592A JP 2002314548 A JP2002314548 A JP 2002314548A JP 2002314548 A JP2002314548 A JP 2002314548A JP 2004148592 A JP2004148592 A JP 2004148592A
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Japan
Prior art keywords
joint
mounting
flange
welded
contact surface
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JP2002314548A
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Japanese (ja)
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JP3748251B2 (en
Inventor
Yoshihiro Akiyama
佳寛 秋山
Masahiko Tashiro
雅彦 田代
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/541—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles a substantially flat extra element being placed between and clamped by the joined hollow-preforms
    • B29C66/5414—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles a substantially flat extra element being placed between and clamped by the joined hollow-preforms said substantially flat extra element being rigid, e.g. a plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an article in which first and second members are welded and in which necessary joining strength is secured in a joined part where a mounting part is molded, and the deformation of the article itself or the mounting surface of the mounting part is prevented or controlled. <P>SOLUTION: The article has a first and a second members 10 and 20 which are thermoplastic resin moldings, and the joining parts 14 and 24 of their peripheral parts C1 and C2 are welded to each other by a welding part M. The mounting part 30 is molded integrally with the second member 20, and contact faces 17, 27, and 38 which face in the direction A1 perpendicular to the mounting face 33 of the mounting part 30 and contact fittings 61 and 62 during welding are formed in the first and second members 10 and 20. The peripheral part C2 comprises a flange 21 having the contact face 27 and the base end part 31 of the mounting part 30. The joining part 24t of the base end part 31 is positioned to overlap the mounting face 33 when seen in the direction A1, and a projection 28 having a contact face 28b positioned to be closer to the welding part M than the mounting face 33 in the direction A1 is formed in the base end part 31. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、熱可塑性樹脂の成形品である第１，第２部材が溶着されて形成された物品およびその物品の製造方法に関し、物品は、例えば、オイルに混入した異物を除去するためのオイルストレーナである。
【０００２】
【従来の技術】
従来、熱可塑性樹脂の成形品である２つの部材が溶着されて形成された物品として、例えば特許文献１に開示されたものがある。この物品では、熱可塑性樹脂からなる２つのケースを接合するために、両ケースの周縁部に全周に渡って成形されて互いに対面可能なフランジが溶着される。そのために、一方のケースのフランジには、熱風が流通する流通溝と、流通溝の両側で流通溝に沿って延びる１対のバリ逃がし溝が設けられ、他方のケースには、前記１対のバリ逃がし溝にそれぞれ対面する１対のバリ逃がし凹部が設けられる。そして、両フランジを加圧しつつ対面させた状態で、流通溝に熱風を流通させ、同時に両フランジに振動を与えることにより、両フランジが溶融されて接合される。
【０００３】
【特許文献１】
特許３１６９１５３号公報
【０００４】
【発明が解決しようとする課題】
ところで、溶着の場合、溶融した材料の拡散現象を促進して、溶着部での接合強度を高めるためには、加圧力を高めることが好ましい。そのため、前記従来技術のように、両ケースの周縁部の全周に渡ってフランジが形成されるときは、図１０（Ａ）に示されるように、溶着部ａで接合される接合部ｂ，ｃが形成された両フランジｄ，ｅに治具ｆ，ｇを当接させて加圧することが一般的である。
【０００５】
しかしながら、物品をボルトなどにより別の部材に取り付けるための取付部を、物品の周縁部に形成する必要がある場合には、取付部をフランジから外方に突出させて形成することになる。このようにすると、取付部はフランジの分だけ外方にさらに突出することになって、取付部を有する物品が大型化し、狭いスペースへの配置が困難になることがある。
【０００６】
そこで、取付部をフランジが欠如した部分から突出させるようにすれば、フランジがない分、取付部での突出量が小さくなって、物品を小型化することができる。しかしながら、図１０（Ｂ）に示されるように、一方のケースのフランジｄに治具ｆを当接させ、他方のケースの取付部ｈの取付面ｈ１に治具ｍを当接させて加圧しようとすると、取付部ｈでの治具ｍとの当接面となる取付面ｈ１が、図１０（Ａ）のフランジｅにおける治具ｇとの当接面ｅ１よりも溶着部ａから離れて位置することがあり、その場合には、取付部ｈでは、治具ｍと溶着部ａとの間の、加圧力の方向での距離が大きくなって、治具ｍの加圧力が接合部ｋに伝達されにくくなり、接合強度が低下する。
【０００７】
そして、接合強度の低下を防止するために、加圧力を増加させると、物品の薄肉部で変形が生じ易くなる難点があるうえ、取付面ｈ１の一部が治具ｍとの当接面になる場合には、該当接面と治具ｍが当接しない面との間で取付面ｈ１の変形が生じて、物品を適正に取り付けることが困難になることがある。
【０００８】
本発明は、このような事情に鑑みてなされたものであり、請求項１，２記載の発明は、熱可塑性樹脂の成形品である第１部材および第２部材が溶着されて形成された物品であって、取付部が成形された部分における接合部での所要の接合強度が確保されると共に、物品自体または取付部の取付面の変形が防止または抑制された物品を提供することを目的とする。そして、請求項２記載の発明は、さらに、取付部の剛性を高めると共にバリの露出を防止することを目的とする。また、請求項３〜５記載の発明は、請求項１記載の物品の製造方法を提供することを目的とする。そして、請求項４，５記載の発明は、さらに、所要の接合強度の確保を容易にすることを目的とする。
【０００９】
【課題を解決するための手段および発明の効果】
請求項１記載の発明は、いずれも熱可塑性樹脂の成形品である第１部材および第２部材を備え、前記第１部材の第１周縁部および前記第２部材の第２周縁部に第１接合部および第２接合部がそれぞれ形成され、前記第１接合部と前記第２接合部とが溶着部で溶着された物品において、前記第２部材には、先端部に取付面を有する取付部が一体成形されており、前記第１部材および前記第２部材には、前記取付面に直交する方向である第１方向に面すると共に溶着時に前記第１接合部および前記第２接合部に加圧力を作用させる治具が当接し得る当接面が形成されていて、前記第２周縁部は、前記当接面を有するフランジと、該フランジが欠如した部分に形成されている前記取付部の基端部とからなり、該基端部の前記第２接合部は、前記第１方向から見て前記取付面と重なる位置にあり、前記基端部には、前記第１方向で前記取付面よりも前記溶着部に近い位置にある前記当接面を有する当接面形成部が形成されている物品である。
【００１０】
これにより、取付部では、加圧力が取付面のみに作用する場合に比べると、治具の加圧力が当接面形成部の当接面を通じて第２接合部に効果的に伝達されるので、第１，第２接合部の溶着部での接合強度が高められるうえ、取付面での治具の加圧が不要になるか、もしくは取付面での治具の加圧力を減少させることができる。また、取付面と基端部の接合部とが第１方向から見て重なるので、取付部が形成されたことによる物品の大型化が抑制される。
【００１１】
この結果、請求項１記載の発明によれば、次の効果が奏される。すなわち、第１部材の第１周縁部の第１接合部と第２部材の第２周縁部の第２接合部とが溶着部で溶着された物品において、第２部材には先端部に取付面を有する取付部が一体成形され、第１，第２部材には、取付面に直交する方向である第１方向に面すると共に溶着時に第１，第２接合部に加圧力を作用させる治具が当接し得る当接面が形成されていて、第２部材の周縁部は、当接面を有するフランジと、フランジが欠如した部分に形成されている取付部の基端部とからなり、基端部には、第１方向で取付面よりも溶着部に近い位置に当接面を有する当接面形成部が形成されていることにより、溶着部での所要の接合強度が確保されて、しかも物品自体または取付面での変形が防止または大幅に抑制される。しかも、基端部の第２接合部は、第１方向から見て取付面と重なる位置に形成されていることにより、取付部が形成された物品の大型化が抑制されて、狭いスペースへの物品の配置が可能になる。
【００１２】
請求項２記載の発明は、請求項１記載の物品において、前記当接面形成部は、前記基端部から突出する凸部であり、前記第２周縁部の少なくとも前記基端部には、前記第２接合部よりも外側にバリトラップ溝が形成されており、前記凸部は、前記バリトラップ溝の外側の側壁に一体成形されているものである。
【００１３】
これにより、凸部により基端部ひいては取付部が剛性が高められ、また溶着部でのバリは、バリトラップ溝に収容されて、基端部および凸部からはみ出すことが防止される。
【００１４】
この結果、請求項２記載の発明によれば、請求項１記載の発明の効果に加えて、次の効果が奏される。すなわち、当接面形成部が基端部から突出する凸部であることにより、取付部の剛性が高められるので、取付部を通じて物品の適正、かつ安定的な取付が可能になる。また、第２周縁部の少なくとも基端部には、第２接合部よりも外側にバリトラップ溝が形成されており、凸部は、バリトラップ溝の外側の側壁に一体成形されていることにより、溶着部のバリが基端部および凸部から外側にはみ出すことがないので、物品の外観性が向上する。
【００１５】
請求項３記載の発明は、いずれも熱可塑性樹脂の成形品である第１部材および第２部材を備え、前記第１部材の第１周縁部および前記第２部材の第２周縁部に第１接合部および第２接合部がそれぞれ形成され、前記第１接合部と前記第２接合部とが溶着部で溶着される物品の製造方法において、前記第２部材には先端部に取付面を有する取付部が一体成形されており、前記第１部材および前記第２部材には、前記取付面に直交する方向である第１方向に面すると共に治具が当接する第１当接面および第２当接面がそれぞれ形成されていて、前記第２周縁部は、前記第２当接面を有するフランジと、該フランジが欠如した部分に形成されている前記取付部の基端部とからなり、該基端部の前記第２接合部は、前記第１方向から見て前記取付面と重なる位置に形成されており、前記基端部には、前記第１方向で前記取付面よりも前記溶着部に近い位置にある前記第２当接面を有する当接面形成部が形成されており、前記治具は、前記第１当接面および前記第２当接面に当接して、いずれも端面を含む部分が溶融状態とされた前記第１接合部および前記第２接合部に加圧力を作用させることにより、前記第１接合部と前記第２接合部とが溶着される物品の製造方法である。
【００１６】
これにより、取付部では、加圧力が取付面のみに作用する場合に比べると、治具の加圧力が当接面形成部の第２当接面を通じて第２接合部に効果的に伝達されるので、第１，第２接合部の溶着部での接合強度が高められるうえ、取付面での治具の加圧が不要になるか、もしくは取付面での治具の加圧力を減少させることができる。また、取付面と基端部の第２接合部とが第１方向から見て重なるので、取付部が形成されたことによる物品の大型化が抑制される。
【００１７】
この結果、請求項３記載の発明によれば、次の効果が奏される。すなわち、第１部材の第１周縁部の第１接合部と第２部材の第２周縁部の第２接合部とが溶着部で溶着される物品の製造方法において、第２部材には先端部に取付面を有する取付部が一体成形され、第１，第２部材には、取付面に直交する方向である第１方向に面する第１，第２当接面がそれぞれ形成されていて、第２周縁部は、当接面を有するフランジと、フランジが欠如した部分に形成されている取付部の基端部とからなり、基端部には、第１方向で取付面よりも溶着部に近い位置に第２当接面を有する当接面形成部が形成されており、治具は、第１当接面および第２当接面に当接して、いずれも端面を含む部分が溶融状態とされた第１接合部および第２接合部に加圧力を作用させて、第１接合部と第２接合部とが溶着されることにより、溶着部での所要の接合強度が確保されて、しかも物品自体または取付面の変形が防止または大幅に抑制された物品を製造することができる。そのうえ、基端部の第２接合部は、第１方向から見て取付面と重なる位置に形成されていることにより、取付部が形成された物品であって、大型化が抑制されて、狭いスペースへの配置が可能な物品を製造することができる。
【００１８】
請求項４記載の発明は、請求項３記載の物品の製造方法において、溶着開始直前において、前記基端部の前記第２接合部の端面と、前記基端部の前記第２接合部に溶着される前記第１接合部の端面との加圧方向での間隔は、前記フランジの前記第２接合部の端面と、前記フランジの前記第２接合部に溶着される前記第１接合部の端面との加圧方向での間隔よりも小さいものである。
【００１９】
これにより、第１接合部と基端部の第２接合部との間では、加圧方向での溶着範囲が大きくなる。
この結果、請求項４記載の発明によれば、請求項３記載の発明の効果に加えて、次の効果が奏される。すなわち、溶着開始直前において、基端部の第２接合部の端面と第１接合部の端面との加圧方向での間隔は、フランジの第２接合部の端面と第１接合部の端面との加圧方向での間隔よりも小さいことにより、第１接合部と基端部の第２接合部との溶着部の形成範囲が大きくなるので、取付部の第２接合部での接合強度の確保が容易になり、さらに接合強度が一層高められる。
【００２０】
請求項５記載の発明は、請求項３または請求項４記載の物品の製造方法において、溶着開始直前において、前記基端部の前記第２接合部の端面および前記基端部の前記第２接合部に溶着される前記第１接合部の端面の少なくとも一方の端面の幅は、前記フランジの前記第２接合部の端面および前記フランジの前記第２接合部に溶着される前記第１接合部の端面の幅よりも狭いものである。
【００２１】
これにより、第１接合部と基端部の第２接合部との間での接合圧力が、第１接合部とフランジの第２接合部との間の接合圧力に比べて高くなるので、第１接合部と基端部の第２接合部と溶着部での拡散現象がより促進される。
【００２２】
この結果、請求項５記載の発明によれば、引用された請求項記載の発明の効果に加えて、次の効果が奏される。すなわち、溶着開始直前において、基端部の第２接合部の端面およびその第２接合部に溶着される第１接合部の端面の少なくとも一方の端面の幅は、フランジの第２接合部の端面および該第２接合部に溶着される第１接合部の端面の幅よりも狭いことにより、第１接合部と基端部の第２接合部と溶着部での拡散現象がより促進されるので、取付部の第２接合部での接合強度の確保が容易になり、しかも接合強度が一層高められる。
【００２３】
【発明の実施の形態】
以下、本発明の実施例を図１ないし図９を参照して説明する。
図１を参照すると、本発明に係る物品が適用されたオイルストレーナＳは、車両に搭載される内燃機関のオイルパン１内に配置される。オイルパン１は、コンロッド５を介してクランク軸６と連結されるピストン４が嵌合されたシリンダブロック３の下端部に結合されたロアブロック２の下端部に、多数のボルトにより結合される。そして、シリンダブロック３とロアブロック２とに跨って、クランク軸６を回転軸とするトロコイドポンプからなるオイルポンプ７が取り付けられる。
【００２４】
オイルポンプ７は、その上部で、クランク軸６の軸方向でのシリンダブロック３の一方側の端部壁３ａに複数のボルトにより結合され、その下部で、前記軸方向でのロアブロック２の一方側の端部壁２ａに複数のボルトにより結合される。オイルポンプ７のポンプボディ７ａには、ポンプ室に連通する吸入ポート７ｃが形成された吸入部７ｂおよび前記ポンプ室に連通する吐出ポート７ｄが形成された吐出部が形成される。オイルストレーナＳは、後述する取付部３０の平面状の取付面３３が吸入部７ｂの端部に形成された取付部７ｅの平面状の取付面７ｅ１に面接触した状態で、オイルポンプ７に取り付けられる。
【００２５】
図２〜図４を参照すると、オイルストレーナＳは、第１部材としての第１ケース１０と第２部材としての第２ケース２０と濾過部材４０とを備え、第１，第２ケース１０，２０が、それぞれの周縁部である第１周縁部Ｃ１および第２周縁部Ｃ２で相互に溶着されて形成される。そして、両ケース１０，２０により形成される中空部５０に、オイルに混入した異物を除くための網状の濾過部材４０が配置されている。
【００２６】
熱可塑性樹脂、例えばポリアミドにより一体成形された成形品である第１ケース１０には、第２ケース２０により覆われる開口の開口縁である第１周縁部Ｃ１を構成する第１フランジ１１と、取付面３３に直交する方向である第１方向Ａ１に突出して形成されて先端にオイルの入口１２ａが形成される筒状の流入部１２と、第１方向Ａ１で後述する第２凸部２８と対面する位置において第１フランジ１１から突出する舌状の第１凸部１８とが、一体成形されている。なお、第１方向Ａ１は、この実施例では両ケース１０，２０を溶着するための第１，第２治具６１，６２がそれぞれ第１，第２ケース１０，２０に加える加圧力の方向ＡＦに平行な方向（以下、加圧方向という。）でもある。
【００２７】
第１ケース１０の前記開口を全周に渡って囲む環状の第１フランジ１１は、第１フランジ１１の全周に渡って形成されると共に第２ケース２０の第２対向面２３と第１方向Ａ１で対面する第１対向面１３を有する。第１対向面１３には、その全周に渡って第１方向Ａ１で第２対向面２３に向かって突出して形成されると共に溶着部Ｍで第２接合部２４に溶着されている１条の環状の突条からなる第１接合部１４が形成される。なお、図面では、説明の便宜上、溶着部Ｍを第１，第２ケース１０，２０および濾過部材４０とは異なるハッチングで示している。
【００２８】
さらに、第１対向面１３には、第１接合部１４の外側および内側で、第１接合部１４に沿って全周に渡って延びる環状溝からなる１条の外側バリトラップ溝１５および１条の内側バリトラップ溝１６がそれぞれ形成される。また、第１フランジ１１において、第１方向Ａ１で第１対向面１３とは反対側の面には、第１ケース１０と第２ケース２０との溶着時に、第１接合部１４に加圧方向での加圧力を作用させるための第１治具６１が当接する当接面１７が、第１方向Ａ１に面して形成されている。
【００２９】
第１フランジ１１の一部に形成された第１凸部１８は、第１接合部１４の外側に位置するように、外側バリトラップ溝１５の外側の側壁１５ａに一体成形されている。第１凸部１８は、第１方向Ａ１で第２凸部２８の端面２８ａと対面する対向面でもある端面１８ａと、第１方向Ａ１で第２ケース２０および端面１８ａとは反対側の面に、溶着時に第１治具６１が当接する当接面１８ｂとを有する。それゆえ、第１凸部１８は当接面形成部である。第１方向Ａ１に面する当接面１８ｂは、当接面１７と同一平面上または当接面１７を含む平面の近傍にあり、また端面１８ａには凹部１８ｃが形成されている。
【００３０】
熱可塑性樹脂、例えばポリアミドにより一体成形された成形品である第２ケース２０には、第１ケース１０により覆われる開口の開口縁である第２周縁部Ｃ２と、第１方向Ａ１に突出して形成されて先端部に取付フランジ３２を有する取付部３０と、取付部３０から突出する舌状の第２凸部２８とが、一体成形されている。
【００３１】
オイルポンプ７の取付部７ｅ（図１参照）に取り付けられる取付フランジ３２に形成された取付面３３には、濾過部材４０を通過して清浄になったオイルがオイルストレーナＳから流出するための出口２２ａが開口する。それゆえ、取付部３０はオイルストレーナＳの流出部２２を兼ねる。また、取付フランジ３２には、締結部材としての、取付部７ｅに設けられた１対の植え込みボルト８（図１参照）が挿通される１対の貫通孔３４が、出口２２ａを挟んで設けられる。各植え込みボルト８は、各貫通孔３４に圧入された金属製のブッシュ３５の内側を通る。
【００３２】
第２ケース２０の前記開口を全周に渡って囲む環状の第２周縁部Ｃ２は、取付部３０を除いて第１フランジ１１と対面する第２フランジ２１と、第２フランジ２１が欠如した部分に形成されて、第２フランジ２１と連続すると共に第１フランジ１１と対面する取付部３０の基端部３１とからなる。第２フランジ２１および基端部３１にそれぞれ形成されるフランジ側第２対向面２３ｆおよび取付部側第２対向面２３ｔは、互いに連続しており、全体として第２周縁部Ｃ２の全周に渡って形成される第２対向面２３を構成する。
【００３３】
第２対向面２３には、その全周に渡って第１方向Ａ１で第１接合部１４に対向して突出して形成されると共に溶着部Ｍで第１接合部１４に溶着される１条の環状の突条からなる第２接合部２４が形成される。そして、第２接合部２４は、フランジ側第２対向面２３ｆおよび取付部側第２対向面２３ｔにそれぞれ形成されるフランジ側第２接合部２４ｆおよび取付部側第２接合部２４ｔとからなる。このうち、図２（Ａ），図２（Ｃ），図４から判るように、取付部側第２接合部２４ｔは、その殆どの部分で、第１方向Ａ１から見て取付面３３と重なる位置に形成されている。
【００３４】
さらに、第２対向面２３には、第２接合部２４の外側で、第２接合部２４に沿って第２対向面２３の全周に延びる環状溝からなる１条の外側バリトラップ溝２５が形成され、第２接合部２４の内側で、濾過部材４０を第１ケース１０に保持するための段部からなる保持部２６が形成される。また、第２フランジ２１において、第１方向Ａ１でフランジ側第２対向面２３ｆとは反対側の面には、溶着時に加圧力を第２接合部２４に作用させるための第２治具６２が当接する当接面２７が、第１方向Ａ１に面して形成されている。
【００３５】
溶着部Ｍおよび中間位置から、第１方向Ａ１で第２フランジ２１の当接面２７よりも離れた位置にある取付面３３においては、少なくとも取付部側第２接合部２４ｔと取付部３０とが第１方向Ａ１から見て重なる部分が、第２治具６２が当接する当接面３８とされる。ここで、前記中間位置とは、第１対向面１３と第２対向面２３との第１方向Ａ１での間の中央点の軌跡で定まる位置であり、この実施例では、外側バリトラップ溝１５および外側バリトラップ溝２５のそれぞれの側壁１５ａ，２５ａにおける第１対向面１３と第２対向面２３との第１方向Ａ１での間の中間位置にある仮想平面Ｈ（図３，図４参照）の位置である。
【００３６】
基端部３１の一部に突出して形成された第２凸部２８は、取付部側第２接合部２４ｔの外側に位置するように、外側バリトラップ溝２５の外側の側壁２５ａに一体成形されている。図２（Ａ）を参照すると、第２凸部２８は、第１方向Ａ１から見て、基端部３１の、第２フランジ２１の両端部２１ａ，２１ｂを結ぶ仮想直線Ｌから最も離れた部位を含む位置にあり、また植え込みボルト８（図１参照）を利用してオイルストレーナＳをオイルポンプ７に締結する際の締付け工具と干渉しない位置にある。
【００３７】
そして、第２凸部２８は、第１方向Ａ１で第１凸部１８と対面する対向面でもある端面２８ａと、第１方向Ａ１で第１ケース１０および端面２８ａとは反対側に、溶着時に第２治具６２が当接する当接面２８ｂとを有する。それゆえ、第２凸部２８は当接面形成部である。第１方向Ａ１に面する当接面２８ｂは、第２フランジ２１の当接面２７と同一平面上または当接面２７を含む平面の近傍にあり、第１方向Ａ１で取付面３３よりも溶着部Ｍおよび前記中間位置に近い位置にあるので、第２治具６２により加えられる加圧力が、第２治具６２が取付面３３に当接する場合に比べて、第２凸部２８および基端部３１を通じて取付部側第２接合部２４ｔに確実に伝達される。また、第２凸部２８およびその当接面２８ｂは、第１方向Ａ１から見て取付面３３さらには取付部３０と重ならない位置にある。
【００３８】
このように、第１フランジ１１の当接面１７および第１凸部１８の当接面１８ｂは、第１ケース１０に形成された第１当接面であり、第２フランジ２１の当接面２７、第２凸部２８の当接面２８ｂおよび取付面３３の当接面３８は、第２ケース２０に形成された第２当接面である。そして、第１ケース１０に形成された当接面１７，１８ｂと、当接面３８を除いて第２ケース２０に形成された当接面２７，２８ｂとは、溶着時に加圧力をほぼ均等に溶着部Ｍに伝達するように、溶着部Ｍまたは前記中間位置からほぼ等距離にある。
【００３９】
図３，図４を参照すると、熱可塑性樹脂、例えばポリアミドの成形品である濾過部材４０は、第２ケース２０の保持部２６に保持される第３周縁部Ｃ３を構成する第３フランジ４１を有し、第３フランジ４１において第１対向面１３と対向する第３対向面４３には、第３対向面４３の全周に渡って延びて第１対向面１３に向かって突出すると共に溶着部Ｍで第１接合部１４に溶着される１条の環状の突条からなる第３接合部４４が形成される。また、第３対向面４３には、第３接合部４４の内側で、第３接合部４４に沿って第３対向面４３の全周に渡って延びる環状溝からなる１条のバリトラップ溝４５が形成される。
【００４０】
第３フランジ４１が保持部２６に保持された状態で、第３接合部４４の外周面と第２接合部２４の内周面とは接触する。そして、第３対向面４３は、第２フランジ２１に形成された保持部２６に保持される第３フランジ４１の部分に形成されるフランジ側第３対向面４３ｆと、基端部３１に形成された保持部２６に保持される第３フランジ４１の部分に形成される取付部側第３対向面４３ｔとからなり、両第３対向面４３ｆ，４３ｔは互いに連続している。また、第３接合部４４は、フランジ側第３対向面４３ｆに形成されたフランジ側第３接合部４４ｆと、取付部側第３対向面４３ｔに形成された取付部側第３接合部４４ｔとからなる。
【００４１】
なお、各バリトラップ溝１５，１６，２５，４５には、溶着時に第１接合部１４，第２接合部２４および第３接合部４４で発生したバリＦが収容されるので、バリＦが第１，第２周縁部ｃ１，Ｃ２から、オイルストレーナＳの外部および中空部５０に露出することがない。
【００４２】
このようにして、図３，図４に示されるように、オイルストレーナＳにおいて、中空部５０は、第１，第２周縁部Ｃ１，Ｃ２に保持された濾過部材４０により、オイルの流れに対して濾過部材４０よりも上流に位置して入口１２ａ（図２参照）に連なる上流側室５０ａと、濾過部材４０よりも下流に位置して出口２２ａ（図２参照）に連なる下流側室５０ｂとに区画される。
【００４３】
図１を併せて参照すると、オイルストレーナＳは、オイルポンプ７の取付部７ｅに設けられた１対の植え込みボルト８が取付フランジ３２の１対の貫通孔３４にそれぞれ挿通された後、各植え込みボルト８に螺合されるナット９により取付フランジ３２が締め付けられることにより、互いに平行な平面状の第１，第２対向面１３，２３が水平面に対して傾斜した状態で、オイルポンプ７に締結される。このとき、取付面３３に出口２２ａを囲んで形成された円環状の装着溝３６に装着された弾性体からなる円環状のシール部材３７（図２（Ｂ）参照）が、取付面７ｅ１に当接して弾性変形し、これにより、吸入ポート７ｃと出口２２ａとが液密に密封された状態で接続される。それゆえ、両取付面７ｅ１，３３はシール面でもある。
【００４４】
オイルポンプ７にオイルストレーナＳが取り付けられた状態で、内燃機関が運転されて、クランク軸６の回転によりオイルポンプ７が作動すると、オイルパン１に貯留されたオイルは、オイルストレーナＳを介してオイルポンプ７により汲み上げられる。具体的には、オイルストレーナＳの入口１２ａから下流側室５０ａに流入したオイルは、濾過部材４０を通って清浄にされて下流側室５０ｂに至り、さらに出口２２ａから流出して吸入ポート７ｃに流入する。吸入ポート７ｃを通って前記ポンプ室に流入したオイルは、該ポンプ室で高圧にされた後、吐出ポート７ｄに吐出され、その後オイルフィルタを通り、シリンダブロック３に形成されたメインギャラリを経て各軸受や摺動部等の潤滑箇所に供給される。潤滑箇所を潤滑した後のオイルは、戻り油路やクランク室を経てオイルパン１に帰還する。
【００４５】
ところで、第１ケース１０と第２ケース２０とは熱板溶着法により溶着される。そのために、第１ケース１０と、濾過部材４０が保持部２６に保持された第２ケース２０とは、取付面３３が水平になり、第１，第２対向面１３，２３が互いに平行になると共に水平面に対して傾斜した状態で、かつ第１，第２ケース１０，２０の当接面１７，１８ｂ，２７，２８ｂ，３８にそれぞれ第１，第２治具６１，６２が接触した状態で、固定台に固定された第１治具６１および移動方向に往復動可能な可動台に固定された第２治具６２にそれぞれ固定される。このとき、離れた状態にある第１接合部１４および第２接合部２４は、第２治具６２の移動方向（この実施例では加圧方向および第１方向Ａ１と同じである。）で対向する位置を占めている。
【００４６】
この状態で、第１，第２，第３接合部１４，２４，４４において、第１，第２，第３接合部１４，２４，４４の端面である先端面１４ａ，２４ａ，４４ａ（図５，図６参照）と溶着部Ｍを構成する部分とを含む溶融部分が、融点を超えて溶融状態になるまで、第１，第２，第３接合部１４，２４，４４に接触する熱板（図示されず。）により加熱され、その後、該熱板が取り去られる。
【００４７】
そして、溶着開始直前のときの第１，第２，第３接合部１４，２４，４４の状態が、図５，図６に示されている。溶着開始直前の第１，第２，第３接合部１４，２４，４４において、取付部側第２接合部２４ｔおよび取付部側第２第３接合部４４ｔは、当接面２７または当接面２８ｂに対してフランジ側第２接合部２４ｆよりも大きな突出量で、加圧方向または第１方向Ａ１に突出している。一方、第１接合部１４は、当接面１７または当接面１８ｂに対して全周に渡って同じ突出量で加圧方向または第１方向Ａ１に突出している。そして、取付部側第２接合部２４ｔの先端面２４ａおよび取付部側第３接合部４４ｔの先端面４４ａとは同一平面上にある。
【００４８】
それゆえ、取付部側第２接合部２４ｔの先端面２４ａおよび取付部側第３接合部４４ｔの先端面４４ａと、取付部側第２接合部２４ｔおよび取付部側第３接合部４４ｔに溶着される第１接合部１４の先端面１４ａとの加圧方向での間隔Ｄｔは、フランジ側第２接合部２４ｆの先端面２４ａおよびフランジ側第３接合部４４ｆの先端面４４ａと、フランジ側第２接合部２４ｆおよびフランジ側第３接合部４４ｆに溶着される第１接合部１４の先端面１４ａとの加圧方向での間隔Ｄｆよりも小さく設定される。
【００４９】
また、溶着開始直前において、取付部側第２接合部２４ｔの先端面２４ａの幅Ｗ２ｔは、フランジ側第２接合部２４ｆの先端面２４ａの幅Ｗ２ｆ、そしてフランジ側第２接合部２４ｆに溶着される第１接合部１４の先端面１４ａの幅Ｗ１ｆおよび取付側第２接合部２４ｔに溶着される第１接合部１４の先端面１４ａの幅Ｗ１ｔの幅よりも狭く設定される。なお、取付部側第３接合部４４ｔの先端面４４ａおよびフランジ側第３接合部４４ｆの先端面４４ａのそれぞれの幅Ｗ３は等しく設定される。
【００５０】
その後、第２治具６２が、第１接合部１４の先端面１４ａおよび第３接合部４４の先端面４４と第２接合部２４の先端面２４ａとが加圧方向で対向する状態で、濾過部材４０が保持された第２ケース２０を第１ケース１０に相対的に近づける移動方向に、第２ケース２０を保持した状態で移動して、第１接合部１４と第２接合部２４および濾過部材４０とを当接させ、さらに両ケース１０，２０が相対的に近づくように第２ケース２０と共に移動することにより、第１治具６１および第２治具６２が、それぞれ第１ケース１０の当接面１７，１８ｂおよび第２ケース２０の当接面２７，２８ｂ，３８を加圧して、いずれも先端面１４ａ，２４ａ，４４ａを含む部分が溶融状態とされた第１，第２，第３接合部１４，２４，４４に加圧方向での加圧力を作用させることにより、第１接合部１４と第２接合部２４および第３接合部４４とが溶着されて、加圧方向または第１方向Ａ１での所定範囲に渡って溶着部Ｍが形成される。
【００５１】
次に、前述のように構成された実施例の作用および効果について説明する。
熱可塑性樹脂の成形品である第１ケース１０の第１フランジ１１の第１接合部１４と熱可塑性樹脂の成形品である第２ケース２０の第２周縁部Ｃ２の第２接合部２４とが溶着部Ｍで溶着されるオイルストレーナＳを製造するにあたり、第２ケース２０には先端部に取付面３３を有する取付部３０が一体成形され、第１ケース１０および第２ケース２０には、取付面３３に直交する方向である第１方向Ａ１に面する当接面１７，１８ｂおよび当接面２７，２８ｂ，３８がそれぞれ形成されていて、第２周縁部Ｃ２は、当接面２７を有する第２フランジ２１と、第２フランジ２１が欠如した部分に形成されている取付部３０の基端部３１とからなり、基端部３１には、第１方向Ａ１で取付面３３よりも溶着部Ｍまたは前記中間位置に近い位置に当接面２８ｂを有する第２凸部２８が形成されており、第１，第２治具６１，６２は、第１ケース１０の各当接面１７，１８ｂおよび第２ケース２０の各当接面２７，２８ｂ，３８に当接して、いずれも先端面１４ａ，２４ａ，４４ａを含む部分が溶融状態とされた第１，第２接合部１４，２４および濾過部材４０の第３接合部４４に加圧力を作用させて、第１接合部１４と第２接合部２４とが溶着され、さらに第１接合部１４と第３接合部４４とが溶着される。これにより、取付部３０では、加圧力が取付面３３のみに作用する場合に比べると、第２治具６２の加圧力が第２凸部２８の当接面２８ｂを通じて第２接合部２４に効果的に伝達されるので、第１，第２接合部１４，２４の溶着部Ｍでの接合強度が高められて、所要の接合強度が確保され、しかも取付面３３の当接面３８での第２治具６２の加圧力を減少させることができるので、オイルストレーナＳ自体または取付面３３での変形が防止または大幅に抑制されたオイルストレーナＳを製造することができる。そのうえ、基端部３１の第２接合部２４ｔは、第１方向Ａ１から見て取付面３３と重なる位置に形成されていることにより、取付部３０が形成されたオイルストレーナＳであって、大型化が抑制されて、狭いスペースへの配置が可能なオイルストレーナＳを製造することができる。
【００５２】
また、オイルストレーナＳがオイルポンプ７に取り付けられるとき、出口２２ａとオイルポンプ７の吸入ポート７ｃとが液密状態で接続されて、両取付面７ｅ１，３３がシール面を構成することにより、シール面である取付面３３の変形が前述のように防止または抑制されるので、オイルストレーナＳとオイルポンプ７との接続部で、高いシール性を確保することができる。
【００５３】
第２凸部２８は、第１方向Ａ１から見て、基端部３１の、第２フランジ２１の両端部２１ａ，２１ｂを結ぶ仮想直線Ｌから最も離れた部位を含む位置にあることにより、取付部側第２接合部２４ｔにおいて、第２フランジ２１の当接面２７から最も離れているために、最も接合強度が低下する可能性がある部分に、第２凸部２８を通じて第２治具６２の加圧力を作用させることができるので、取付部側第２接合部２４ｔと第１接合部１４との接合強度を全体的に高めることができる。
【００５４】
第２凸部２８が基端部３１から突出して形成されることにより、取付部３０の剛性が高められるので、取付部３０を通じてオイルストレーナＳの適正、かつ安定的な取付が可能になる。また、第２周縁部Ｃ２の少なくとも基端部３１には、取付部側第２接合部２４ｔよりも外側に外側バリトラップ溝２５が形成されており、第２凸部２８は、外側バリトラップ溝２５の外側の側壁２５ａに一体成形されていることにより、溶着部ＭのバリＦが基端部３１および凸部２８から外側にはみ出すことがないので、オイルストレーナＳの外観性が向上する。さらに、第１周縁部Ｃ１および第２周縁部Ｃ２には、第１接合部１４および第２接合部２４の外側に、両周縁部Ｃ１，Ｃ２の全周に渡って外側バリトラップ溝１５，２５が形成されていることにより、第１周縁部Ｃ１および第２周縁部Ｃ２の全周で、溶着部ＭのバリＦがオイルストレーナＳの外部に露出することがないので、この点でもオイルストレーナＳの外観性が向上する。
【００５５】
溶着開始直前において、取付部側第２接合部２４ｔの先端面２４ａと該取付部側第２接合部２４ｔに溶着される第１接合部１４の先端面１４ａとの加圧方向での間隔Ｄｔは、フランジ側第２接合部２４ｆの先端面２４ａと該フランジ側第２接合部２４ｆに溶着される第１接合部１４の先端面１４ａとの加圧方向での間隔Ｄｆよりも小さいことにより、第１接合部１４と取付部側第２接合部２４ｔとの溶着部Ｍの加圧方向での形成範囲が大きくなるので、取付部側第２接合部２４ｔでの接合強度の確保が容易になり、しかも接合強度が一層高められる。
【００５６】
また、溶着開始直前において、取付部側第２接合部２４ｔの先端面２４ａの幅Ｗ２ｔは、フランジ側第２接合部２４ｆの先端面２４ａの幅Ｗ２ｆおよび該フランジ側第２接合部２４に溶着される第１接合部１４の先端面１４ａの幅Ｗ１ｆよりも狭いことにより、第１接合部１４と取付部側第２接合部２４ｔとの間での接合圧力が、第１接合部１４とフランジ側第２接合部２４ｆとの間の接合圧力に比べて高くなるので、第１接合部１４と取付部側第２接合部２４ｔとの間の溶着部Ｍでの拡散現象がより促進されて、この点でも、取付側第２接合部２４ｔでの接合強度の確保が容易になり、しかも接合強度が一層高められる。
【００５７】
以下、前述した実施例の一部の構成を変更した実施例について、変更した構成に関して説明する。
第２ケース２０に複数の取付部が形成されてもよく、また第１ケース１０および第２ケース２０にそれぞれ取付部が形成されてもよい。治具については、第１治具６１が移動し、第２治具６２が固定されていてもよく、さらに両治具６１，６２が移動するものであってもよい。
【００５８】
第１，第２凸部１８，２８は、図７に示されるように、凹部１８ｃ，２８ｃが端面１８ａ，２８ａではなく当接面１８ｂ，２８ｂ側に形成されたものであってもよく、また図８に示されるように、端面１８ａ，２８ａおよび当接面１８ｂ，２８ｂ側に凹部が形成されないものであってもよい。さらに、第１，第２凸部１８，２８が形成されることにより、第１フランジ１１の剛性または基端部３１から先端部の取付フランジ３２までの取付部３０の剛性が不足する場合には、図４に二点鎖線で示されるように、当接面１８ｂおよび当接面２８ｂの一部と第１フランジ１１の外周面および取付部３０の外周面との間を連結するリブ１９，２９がそれぞれ設けられてもよい。
【００５９】
また、第１，第２凸部１８，２８の端面１８ａ，２８ａを利用して、第１，第２ケース１０，２０の位置決め部を形成することもできる。例えば、図９に示されるように、第１凸部１８の端面１８ａに嵌合凸部１８ｄが形成され、第２凸部２８の端面２８ａに嵌合凹部２８ｄが形成されることにより、さらに、一般的には、第１，第２凸部１８，２８において、一方の凸部の端面に嵌合凸部が形成され、他方の凸部の端面に嵌合凹部が形成されることにより、溶着時に嵌合凸部が嵌合凹部に嵌合するようにできる。これにより、第１ケース１０および第２ケース２０の溶着時の位置決めをすることができて、溶着時の第１ケース１０と第２ケース２０との間の位置ずれが確実に防止される。
【００６０】
第２ケース２０には、当接面２７を有する第２フランジ２１が第２周縁部Ｃ２の全周に形成されることから、第２凸部２８がなくてもよい。前記実施例では、両ケース１０，２０において、１対で１組の第１，第２凸部１８，２８が形成されたが、両ケース１０，２０において、１対の複数の組の第１，第２凸部が形成されてもよい。
【００６１】
取付面３３の全面が第２治具６２との当接面であってもよい。また、第２治具６２が当接する第２凸部２８のみで、取付部側第２接合部２４ｔと第１接合部１４との溶着部Ｍでの所要の接合強度が得られる場合には、取付面３３を第２治具６２が当接する当接面とする必要はない。そのため、この場合には取付面３３での第２治具６２による加圧が不要になるので、オイルストレーナＳ自体または取付面３３を含む取付部３０での変形が防止される。
【００６２】
溶着開始直前において、取付部側第２接合部２４ｔに溶着される第１接合部１４の先端面１４ａの幅Ｗ１ｔが、フランジ側第２接合部２４ｆの先端面２４ａの幅Ｗ２ｆおよび該フランジ側第２接合部２４ｆに溶着される第１接合部１４の先端面１４ａの幅Ｗ１ｆよりも狭く設定されてもよい。この場合にも、第１接合部１４と取付部側第２接合部２４ｔとの間での接合圧力が、第１接合部１４とフランジ側第２接合部２４ｆとの間の接合圧力に比べて高くなるので、取付側第２接合部２４ｔでの接合強度の確保が容易になり、しかも接合強度が一層高められる。
【００６３】
当接面形成部は、凸部ではなく、第１，第２治具６１，６２が当接可能な底面を有する凹部により構成されてもよい。
溶着は、熱板溶着法以外の溶着法、例えば振動溶着法、超音波溶着法、レーザー溶着法によって行われてもよい。
【００６４】
オイルストレーナＳが設けられる内燃機関は、前記実施例では車両に使用されるものであったが、鉛直方向を指向するクランク軸を備える船外機等の船舶推進装置に使用されるものであってもよい。さらに、オイルストレーナＳは、内燃機関以外の機器に設けられてもよい。
【００６５】
オイルストレーナＳは内燃機関のオイルパン１内に配置されるものであったが、内燃機関以外の機器に使用されるオイルストレーナであってもよい。また、部品は、オイルストレーナ以外の中空部を有する物品であってもよい。
【図面の簡単な説明】
【図１】本発明の物品の実施例であるオイルストレーナを備える内燃機関の概略の断面図である。
【図２】図１のオイルストレーナについて、（Ａ）は上平面図であり、（Ｂ）は側面図であり、（Ｃ）は下平面図である。
【図３】図２のＩＩＩ−ＩＩＩでの断面図である。
【図４】図２のＩＶ−ＩＶでの断面図である。
【図５】溶着開始直前の状態を示す図３に対応する要部拡大断面図である。
【図６】溶着開始直前の状態を示す図４に対応する要部拡大断面図である。
【図７】凸部の第１変形例を示す図３に対応する要部断面図である。
【図８】凸部の第２変形例を示す図３に対応する要部断面図である。
【図９】凸部の第３変形例を示す図３に対応する要部断面図である。
【図１０】従来技術を説明するための模式的な断面図であり、（Ａ）は、物品を構成する２つのケースのフランジが治具により加圧される様子を示し、（Ｂ）は、一方のケースのフランジが、他方のケースの取付部がそれぞれ治具により加圧される様子を示す。
【符号の説明】
１…オイルパン、２…ロアブロック、３…シリンダブロック、４…ピストン、５…コンロッド、６…クランク軸、７…オイルポンプ、８…植え込みボルト、９…ナット、１０…第１ケース、１１…第１フランジ、１２…流入部、１３…第１対向面、１４…第１接合部、１５，１６…バリトラップ溝、１７…当接面、１８…第１凸部、１９…リブ、
２０…第２ケース、２１…第２フランジ、２２…流出部、２３…第２対向面、２４…第２接合部、２５…バリトラップ溝、２６…保持部、２７…当接面、２８…第２凸部、２９…リブ、
３０…取付部、３１…基端部、３２…取付フランジ、３３…取付面、３４…貫通孔、３５…ブッシュ、３６…装着溝、３７…シール部材、３８…当接面、
４０…濾過部材、４１…第３フランジ、４３…第３対向面、４４…第３接合部、４５…バリトラップ溝、、
５０…中空部、６１，６２…治具、
Ｓ…オイルストレーナ、Ａ１…第１方向、ＡＦ…加圧力の方向、Ｃ１，Ｃ２，Ｃ３…周縁部、Ｍ…溶着部、Ｈ…仮想平面、Ｌ…仮想直線、Ｆ…バリ、Ｄｆ，Ｄｔ…間隔、Ｗ１ｆ，Ｗ１ｔ，Ｗ２ｆ，Ｗ２ｔ，Ｗ３…幅。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an article formed by welding first and second members, which are molded articles of a thermoplastic resin, and a method of manufacturing the article. The article is, for example, an oil for removing foreign matter mixed in oil. It is a strainer.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as an article formed by welding two members which are molded articles of a thermoplastic resin, for example, there is an article disclosed in Patent Document 1. In this article, in order to join two cases made of a thermoplastic resin, flanges formed over the entire periphery of the two cases and welded to each other are welded. For this purpose, a flange of one case is provided with a flow groove through which hot air flows, and a pair of burr relief grooves extending along the flow groove on both sides of the flow groove, and the other case is provided with the pair of burr release grooves. A pair of deburring recesses respectively facing the deburring grooves are provided. Then, in a state where both flanges face each other while being pressurized, hot air is circulated through the circulation groove, and at the same time, vibration is applied to both flanges, so that both flanges are melted and joined.
[0003]
[Patent Document 1]
Japanese Patent No. 3169153
[0004]
[Problems to be solved by the invention]
Incidentally, in the case of welding, it is preferable to increase the pressing force in order to promote the diffusion phenomenon of the molten material and increase the bonding strength at the welded portion. Therefore, when the flange is formed over the entire periphery of the peripheral portion of both cases as in the prior art, as shown in FIG. 10A, the joining portions b, Generally, jigs f and g are brought into contact with both flanges d and e where c is formed, and pressurized.
[0005]
However, when it is necessary to form an attachment portion for attaching the article to another member with a bolt or the like at the peripheral edge of the article, the attachment section is formed to protrude outward from the flange. In this case, the mounting portion further protrudes outward by the amount of the flange, so that the article having the mounting portion becomes large, and it may be difficult to arrange the article in a narrow space.
[0006]
Therefore, if the mounting portion is made to protrude from the portion where the flange is absent, the amount of protrusion at the mounting portion is reduced due to the absence of the flange, and the article can be downsized. However, as shown in FIG. 10 (B), the jig f is brought into contact with the flange d of one case, and the jig m is brought into contact with the mounting surface h1 of the mounting portion h of the other case. If this is attempted, the mounting surface h1 which is the contact surface with the jig m at the mounting portion h is farther from the welded portion a than the contact surface e1 with the jig g in the flange e of FIG. In this case, in the mounting portion h, the distance between the jig m and the welded portion a in the direction of the pressing force increases, and the pressing force of the jig m And the bonding strength is reduced.
[0007]
When the pressing force is increased in order to prevent the joint strength from being reduced, there is a problem that the thin portion of the article tends to be deformed, and a part of the mounting surface h1 is in contact with the jig m. In such a case, the attachment surface h1 may be deformed between the contact surface and the surface on which the jig m does not contact, and it may be difficult to attach the article properly.
[0008]
The present invention has been made in view of such circumstances, and the invention according to claims 1 and 2 is an article formed by welding a first member and a second member which are molded products of a thermoplastic resin. It is an object of the present invention to provide an article in which a required joining strength at a joining section in a portion where an attaching section is formed is secured, and deformation of the article itself or an attaching surface of the attaching section is prevented or suppressed. I do. The second object of the present invention is to further increase the rigidity of the mounting portion and prevent the burr from being exposed. Another object of the present invention is to provide a method for manufacturing an article according to the first aspect. The fourth and fifth aspects of the present invention further aim to facilitate securing required joint strength.
[0009]
Means for Solving the Problems and Effects of the Invention
The invention according to claim 1 includes a first member and a second member, both of which are molded products of a thermoplastic resin, and a first peripheral portion of the first member and a first peripheral portion of the second member. In an article in which a joining portion and a second joining portion are respectively formed and the first joining portion and the second joining portion are welded by a welding portion, the second member has an attaching portion having an attaching surface at a tip end. Are integrally formed, and the first member and the second member face the first direction, which is a direction orthogonal to the mounting surface, and are added to the first joint portion and the second joint portion during welding. A contact surface with which a jig for applying pressure is in contact is formed, and the second peripheral portion includes a flange having the contact surface and a mounting portion formed on a portion where the flange is missing. A base end portion, and the second joint portion of the base end portion is the first joint portion. A contact surface forming portion having the contact surface at a position closer to the welding portion than the mounting surface in the first direction at the base end portion at a position overlapping with the mounting surface when viewed from the front. It is a formed article.
[0010]
Thereby, in the mounting portion, the pressing force of the jig is effectively transmitted to the second joint portion through the contact surface of the contact surface forming portion, as compared with the case where the pressing force acts only on the mounting surface. The joining strength at the welded portions of the first and second joints can be increased, and the pressing of the jig on the mounting surface becomes unnecessary, or the pressing force of the jig on the mounting surface can be reduced. . In addition, since the mounting surface and the joining portion of the base end overlap when viewed from the first direction, an increase in the size of the article due to the formation of the mounting portion is suppressed.
[0011]
As a result, according to the first aspect of the invention, the following effects can be obtained. That is, in an article in which the first joining portion of the first peripheral portion of the first member and the second joining portion of the second peripheral portion of the second member are welded at the welding portion, the second member has an attachment surface at the distal end portion. And a jig that faces the first and second members in a first direction perpendicular to the mounting surface and applies a pressing force to the first and second joints during welding. A peripheral surface of the second member includes a flange having a contact surface and a base end of a mounting portion formed in a portion where the flange is missing. At the end portion, a contact surface forming portion having a contact surface at a position closer to the welding portion than the mounting surface in the first direction is formed, so that required joining strength at the welding portion is secured, Moreover, deformation of the article itself or the mounting surface is prevented or largely suppressed. In addition, since the second joint portion of the base end portion is formed at a position overlapping the mounting surface when viewed from the first direction, it is possible to suppress an increase in the size of the article on which the mounting portion is formed, and to reduce the size of the article to a narrow space. The arrangement of articles becomes possible.
[0012]
The invention according to claim 2 is the article according to claim 1, wherein the contact surface forming portion is a protrusion protruding from the base end portion, and at least the base end portion of the second peripheral portion includes: A burr trap groove is formed outside the second joint portion, and the protrusion is integrally formed on an outer side wall of the burr trap groove.
[0013]
This increases the rigidity of the base end portion and hence the mounting portion by the convex portion, and the burrs at the welded portion are accommodated in the burr trap groove and are prevented from protruding from the base end portion and the convex portion.
[0014]
As a result, according to the second aspect of the invention, in addition to the effects of the first aspect of the invention, the following effects can be obtained. That is, since the abutment surface forming portion is a convex portion protruding from the base end portion, the rigidity of the mounting portion is increased, so that proper and stable mounting of the article through the mounting portion becomes possible. In addition, at least at the base end of the second peripheral portion, a burr trap groove is formed outside the second joint portion, and the protrusion is integrally formed on the outer side wall of the burr trap groove. Since the burrs of the welded portion do not protrude outside from the base end portion and the convex portion, the appearance of the article is improved.
[0015]
The invention according to claim 3 includes a first member and a second member, both of which are molded products of a thermoplastic resin, and a first peripheral portion of the first member and a first peripheral portion of the second member. In a method for manufacturing an article in which a joint portion and a second joint portion are respectively formed and the first joint portion and the second joint portion are welded at a welding portion, the second member has a mounting surface at a distal end portion. A mounting portion is integrally formed, and the first member and the second member face a first direction, which is a direction orthogonal to the mounting surface, and a first contact surface and a second contact surface with which a jig contacts. Contact surfaces are formed respectively, the second peripheral portion comprises a flange having the second contact surface, and a base end of the mounting portion formed in a portion where the flange is missing, The second joint portion of the base end portion is formed with the mounting surface when viewed from the first direction. And a contact surface forming portion having the second contact surface at a position closer to the welding portion than the mounting surface in the first direction is formed at the base end portion. The jig is in contact with the first contact surface and the second contact surface, and is added to the first joint portion and the second joint portion, each of which has a portion including an end surface in a molten state. A method of manufacturing an article in which the first joint and the second joint are welded by applying pressure.
[0016]
Accordingly, in the mounting portion, the pressing force of the jig is effectively transmitted to the second joint portion through the second contact surface of the contact surface forming portion, as compared with the case where the pressing force acts only on the mounting surface. Therefore, the joining strength at the welded portion of the first and second joints is increased, and the pressing of the jig on the mounting surface is not required or the pressing force of the jig on the mounting surface is reduced. Can be. In addition, since the mounting surface and the second joint at the base end overlap when viewed from the first direction, the size of the article due to the formation of the mounting portion is suppressed.
[0017]
As a result, according to the third aspect of the invention, the following effects can be obtained. That is, in the method for manufacturing an article in which the first joint portion of the first peripheral portion of the first member and the second joint portion of the second peripheral portion of the second member are welded at the welding portion, the second member has a tip portion. An attachment portion having an attachment surface is integrally formed, and the first and second members are respectively formed with first and second contact surfaces facing a first direction which is a direction orthogonal to the attachment surface, The second peripheral portion includes a flange having an abutting surface and a base end of a mounting portion formed at a portion where the flange is missing, and the base end has a welded portion in the first direction that is more welded than the mounting surface. A contact surface forming portion having a second contact surface is formed at a position near the jig, and the jig contacts the first contact surface and the second contact surface, and the portion including both end surfaces is melted. By applying a pressing force to the first joint portion and the second joint portion in the state, the first joint portion and the second joint portion are welded. Required joint strength at the welded portion is ensured, moreover it is possible to produce articles which deformation of the article itself or the mounting surface is prevented or significantly reduced. In addition, since the second joint portion of the base end portion is formed at a position overlapping the mounting surface when viewed from the first direction, the second joint portion is an article having the mounting portion formed thereon, and is prevented from being enlarged, and is narrow. An article that can be arranged in a space can be manufactured.
[0018]
According to a fourth aspect of the present invention, in the method for manufacturing an article according to the third aspect, immediately before the start of welding, welding is performed on the end surface of the second joint portion of the base end portion and the second joint portion of the base end portion. The distance between the end face of the first joint part and the end face of the first joint part to be welded is set to the end face of the second joint part of the flange and the end face of the first joint part welded to the second joint part of the flange. Is smaller than the interval in the pressing direction.
[0019]
Thereby, the welding range in the pressing direction is increased between the first joint and the second joint at the base end.
As a result, according to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the following effect is exerted. That is, immediately before the start of welding, the distance between the end surface of the second joint portion of the base end portion and the end surface of the first joint portion in the pressing direction is equal to the end surface of the second joint portion of the flange and the end surface of the first joint portion. Is smaller than the interval in the pressing direction, the range of formation of the welded portion between the first joint portion and the second joint portion at the base end portion becomes large, so that the joint strength of the attachment portion at the second joint portion is reduced. Securing is facilitated, and bonding strength is further enhanced.
[0020]
According to a fifth aspect of the present invention, in the method for manufacturing an article according to the third or fourth aspect, the end surface of the second joint portion of the base end portion and the second joint portion of the base end portion immediately before the start of welding. The width of at least one of the end surfaces of the first joint portion welded to the portion is the width of the first joint portion welded to the end surface of the second joint portion of the flange and the second joint portion of the flange. It is narrower than the width of the end face.
[0021]
Thereby, the joining pressure between the first joining portion and the second joining portion at the base end is higher than the joining pressure between the first joining portion and the second joining portion of the flange. The diffusion phenomenon at the first joint, the second joint at the base end, and the welded portion is further promoted.
[0022]
As a result, according to the invention described in claim 5, the following effects are exerted in addition to the effects of the invention described in the cited claims. That is, immediately before the start of welding, the width of at least one end face of the end face of the second joint at the base end and the end face of the first joint welded to the second joint is the end face of the second joint of the flange. Also, since the width of the end surface of the first joint portion welded to the second joint portion is smaller than that of the first joint portion, the diffusion phenomenon at the second joint portion and the weld portion at the first joint portion and the base end portion is further promoted. In addition, it is easy to secure the joining strength at the second joining portion of the mounting portion, and the joining strength is further enhanced.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
Referring to FIG. 1, an oil strainer S to which an article according to the present invention is applied is arranged in an oil pan 1 of an internal combustion engine mounted on a vehicle. The oil pan 1 is connected by a number of bolts to a lower end of a lower block 2 connected to a lower end of a cylinder block 3 in which a piston 4 connected to a crankshaft 6 via a connecting rod 5 is fitted. Then, an oil pump 7 composed of a trochoid pump having the crankshaft 6 as a rotation axis is attached so as to straddle the cylinder block 3 and the lower block 2.
[0024]
The oil pump 7 is connected at an upper portion thereof with a plurality of bolts to an end wall 3a on one side of the cylinder block 3 in the axial direction of the crankshaft 6, and at a lower portion thereof, one end of the lower block 2 in the axial direction. It is connected to the end wall 2a on the side by a plurality of bolts. The pump body 7a of the oil pump 7 has a suction portion 7b having a suction port 7c communicating with the pump chamber and a discharge portion having a discharge port 7d communicating with the pump chamber. The oil strainer S is attached to the oil pump 7 in a state where a planar mounting surface 33 of a mounting portion 30 described later is in surface contact with a planar mounting surface 7e1 of a mounting portion 7e formed at an end of the suction portion 7b. Can be
[0025]
Referring to FIGS. 2 to 4, the oil strainer S includes a first case 10 as a first member, a second case 20 as a second member, and a filtering member 40, and first and second cases 10 and 20. Are welded to each other at the first and second peripheral portions C1 and C2. And, in a hollow portion 50 formed by the two cases 10 and 20, a net-like filtering member 40 for removing foreign matter mixed in oil is arranged.
[0026]
The first case 10, which is a molded product integrally formed of a thermoplastic resin, for example, a polyamide, has a first flange 11 constituting a first peripheral portion C <b> 1 which is an opening edge of an opening covered by the second case 20, and an attachment. A cylindrical inflow portion 12 that is formed to protrude in a first direction A1 that is a direction orthogonal to the surface 33 and that has an oil inlet 12a at the tip, and a second convex portion 28 described later in the first direction A1. And a tongue-shaped first convex portion 18 protruding from the first flange 11 at a position where the first flange 11 is formed. In this embodiment, the first direction A1 is the direction A of the pressing force applied to the first and second cases 10 and 20 by the first and second jigs 61 and 62 for welding the two cases 10 and 20 respectively. F (Hereinafter, referred to as a pressing direction).
[0027]
An annular first flange 11 surrounding the opening of the first case 10 over the entire circumference is formed over the entire circumference of the first flange 11, and is in contact with the second facing surface 23 of the second case 20 in the first direction. It has a first facing surface 13 facing at A1. The first opposing surface 13 is formed so as to protrude toward the second opposing surface 23 in the first direction A1 over the entire circumference thereof and is welded to the second joint portion 24 at the welding portion M. A first joining portion 14 formed of an annular ridge is formed. In the drawings, the welded portion M is indicated by hatching different from that of the first and second cases 10 and 20 and the filter member 40 for convenience of explanation.
[0028]
Further, on the first opposing surface 13, one outer varitrap groove 15 and one outer groove formed of an annular groove extending over the entire circumference along the first joint 14 on the outside and inside of the first joint 14. Are formed respectively. In the first flange 11, on the surface opposite to the first facing surface 13 in the first direction A <b> 1, when the first case 10 and the second case 20 are welded, the first joint portion 14 is pressed in the pressing direction. The contact surface 17 with which the first jig 61 for applying the pressing force at the contact is formed is formed facing the first direction A1.
[0029]
The first convex portion 18 formed on a part of the first flange 11 is formed integrally with the outer side wall 15 a of the outer varitrap groove 15 so as to be located outside the first joint portion 14. The first convex portion 18 has an end surface 18a which is also an opposing surface facing the end surface 28a of the second convex portion 28 in the first direction A1, and a surface opposite to the second case 20 and the end surface 18a in the first direction A1. And a contact surface 18b with which the first jig 61 contacts during welding. Therefore, the first convex portion 18 is a contact surface forming portion. The contact surface 18b facing the first direction A1 is on the same plane as the contact surface 17 or near a plane including the contact surface 17, and a concave portion 18c is formed in the end surface 18a.
[0030]
A second case 20, which is a molded article integrally formed of a thermoplastic resin, for example, polyamide, is formed to protrude in a first direction A1 with a second peripheral portion C2 which is an opening edge of an opening covered by the first case 10. The mounting portion 30 having the mounting flange 32 at the tip and the tongue-shaped second convex portion 28 protruding from the mounting portion 30 are integrally formed.
[0031]
The mounting surface 33 formed on the mounting flange 32 which is mounted on the mounting portion 7e (see FIG. 1) of the oil pump 7 has an outlet through which the clean oil that has passed through the filter member 40 flows out of the oil strainer S. 22a is opened. Therefore, the mounting portion 30 also functions as the outflow portion 22 of the oil strainer S. The mounting flange 32 is provided with a pair of through holes 34 as a fastening member through which a pair of studs 8 (see FIG. 1) provided in the mounting portion 7e are inserted with the outlet 22a interposed therebetween. . Each stud 8 passes inside a metal bush 35 pressed into each through hole 34.
[0032]
An annular second peripheral portion C2 surrounding the opening of the second case 20 over the entire circumference has a second flange 21 facing the first flange 11 except for the mounting portion 30, and a portion lacking the second flange 21. And a base end 31 of the mounting portion 30 which is continuous with the second flange 21 and faces the first flange 11. The flange-side second facing surface 23f and the mounting portion-side second facing surface 23t respectively formed on the second flange 21 and the base end portion 31 are continuous with each other, and extend over the entire circumference of the second peripheral portion C2 as a whole. A second facing surface 23 is formed.
[0033]
The second opposing surface 23 is formed so as to protrude across the entire circumference in the first direction A1 so as to face the first joint portion 14 and is welded to the first joint portion 14 at the welded portion M. A second joint 24 formed of an annular ridge is formed. The second joint 24 includes a flange-side second joint 24f and a mounting-part second joint 24t formed on the flange-side second opposing surface 23f and the mounting-part second opposing surface 23t, respectively. Of these, as can be seen from FIGS. 2 (A), 2 (C), and 4, most of the mounting portion side second joining portion 24t overlaps the mounting surface 33 when viewed from the first direction A1. Formed at the location.
[0034]
Further, on the second facing surface 23, a single outer varitrap groove 25 formed of an annular groove extending around the second facing surface 23 along the second joining portion 24 outside the second joining portion 24. A holding portion 26 formed of a step portion for holding the filtering member 40 in the first case 10 is formed inside the second joint portion 24. In the second flange 21, a second jig 62 for applying a pressing force to the second joint portion 24 at the time of welding is provided on a surface opposite to the flange-side second facing surface 23f in the first direction A1. The contact surface 27 that is in contact is formed facing the first direction A1.
[0035]
At least on the mounting portion side second bonding portion 24t and the mounting portion 30 on the mounting surface 33 at a position away from the welded portion M and the intermediate position in the first direction A1 from the contact surface 27 of the second flange 21. The portion that overlaps when viewed from the first direction A1 is the contact surface 38 with which the second jig 62 contacts. Here, the intermediate position is a position determined by a locus of a central point between the first facing surface 13 and the second facing surface 23 in the first direction A1, and in this embodiment, the outer deburring groove 15 A virtual plane H at an intermediate position between the first opposing surface 13 and the second opposing surface 23 in the first direction A1 on the respective side walls 15a, 25a of the outer and deburring grooves 25 (see FIGS. 3 and 4). Position.
[0036]
The second convex portion 28 formed so as to protrude from a part of the base end portion 31 is integrally formed with the outer side wall 25a of the outer deburring groove 25 so as to be located outside the mounting portion side second joint portion 24t. ing. Referring to FIG. 2A, the second convex portion 28 is a portion of the base end portion 31 farthest from a virtual straight line L connecting both ends 21 a and 21 b of the second flange 21 when viewed from the first direction A1. And at a position where it does not interfere with a tightening tool when the oil strainer S is fastened to the oil pump 7 using the stud 8 (see FIG. 1).
[0037]
The second convex portion 28 has an end surface 28a which is also an opposing surface facing the first convex portion 18 in the first direction A1, and a side opposite to the first case 10 and the end surface 28a in the first direction A1 when welding. And a contact surface 28b with which the second jig 62 contacts. Therefore, the second convex portion 28 is a contact surface forming portion. The contact surface 28b facing the first direction A1 is on the same plane as the contact surface 27 of the second flange 21 or near a plane including the contact surface 27, and is more welded than the mounting surface 33 in the first direction A1. Since the second jig 62 is located at a position close to the portion M and the intermediate position, the pressing force applied by the second jig 62 is smaller than when the second jig 62 abuts on the mounting surface 33. It is reliably transmitted to the mounting portion side second joint portion 24t through the portion 31. Further, the second convex portion 28 and the contact surface 28b are located at positions where they do not overlap with the mounting surface 33 and the mounting portion 30 when viewed from the first direction A1.
[0038]
As described above, the contact surface 17 of the first flange 11 and the contact surface 18b of the first convex portion 18 are the first contact surfaces formed on the first case 10 and the contact surfaces of the second flange 21. 27, the contact surface 28 b of the second convex portion 28 and the contact surface 38 of the mounting surface 33 are second contact surfaces formed on the second case 20. The contact surfaces 17 and 18b formed on the first case 10 and the contact surfaces 27 and 28b formed on the second case 20 except for the contact surface 38 substantially uniformly apply the pressing force during welding. It is approximately equidistant from the weld M or the intermediate position so as to transmit to the weld M.
[0039]
Referring to FIGS. 3 and 4, the filtering member 40, which is a molded product of a thermoplastic resin, for example, a polyamide, has a third flange 41 constituting a third peripheral portion C <b> 3 held by the holding portion 26 of the second case 20. The third flange 41 has a third facing surface 43 that faces the first facing surface 13 in the third flange 41, extends over the entire circumference of the third facing surface 43, projects toward the first facing surface 13, and has a welded portion. A third joining portion 44 is formed of one annular ridge welded to the first joining portion 14 at M. In the third opposing surface 43, a single burr trap groove 45 composed of an annular groove extending over the entire circumference of the third opposing surface 43 along the third joining portion 44 inside the third joining portion 44. Is formed.
[0040]
With the third flange 41 held by the holding portion 26, the outer peripheral surface of the third joint portion 44 and the inner peripheral surface of the second joint portion 24 come into contact with each other. The third opposing surface 43 is formed on the flange-side third opposing surface 43 f formed on the portion of the third flange 41 held by the holding portion 26 formed on the second flange 21, and on the base end 31. And the mounting portion side third opposing surface 43t formed at the portion of the third flange 41 held by the holding portion 26, and the third opposing surfaces 43f, 43t are continuous with each other. Further, the third joint portion 44 includes a flange-side third joint portion 44f formed on the flange-side third opposed surface 43f, and a mounting portion-side third joint portion 44t formed on the attachment portion-side third opposed surface 43t. Consists of
[0041]
The burrs F generated in the first joint 14, the second joint 24, and the third joint 44 during welding are accommodated in the burr trap grooves 15, 16, 25, and 45. 1, there is no exposure to the outside of the oil strainer S and the hollow portion 50 from the second peripheral portions c1 and C2.
[0042]
Thus, as shown in FIGS. 3 and 4, in the oil strainer S, the hollow portion 50 is separated from the oil flow by the filter member 40 held at the first and second peripheral portions C1 and C2. And an upstream chamber 50a located upstream of the filtering member 40 and connected to the inlet 12a (see FIG. 2), and a downstream chamber 50b located downstream of the filtering member 40 and connected to the outlet 22a (see FIG. 2). Is done.
[0043]
Referring also to FIG. 1, the oil strainer S is configured such that after a pair of studs 8 provided in the mounting portion 7 e of the oil pump 7 are inserted into a pair of through holes 34 of the mounting flange 32, respectively, When the mounting flange 32 is tightened by the nut 9 screwed to the bolt 8, the first and second opposed surfaces 13 and 23 parallel to each other are fastened to the oil pump 7 in a state inclined with respect to the horizontal plane. Is done. At this time, an annular sealing member 37 (see FIG. 2 (B)) made of an elastic body and fitted in an annular mounting groove 36 formed around the outlet 22a on the mounting surface 33 contacts the mounting surface 7e1. The suction port 7c and the outlet port 22a are connected to each other in a liquid-tightly sealed state. Therefore, both mounting surfaces 7e1 and 33 are also sealing surfaces.
[0044]
When the internal combustion engine is operated with the oil strainer S attached to the oil pump 7 and the oil pump 7 is operated by the rotation of the crankshaft 6, the oil stored in the oil pan 1 is passed through the oil strainer S. The oil is pumped by the oil pump 7. Specifically, the oil that has flowed into the downstream chamber 50a from the inlet 12a of the oil strainer S is cleaned through the filtering member 40, reaches the downstream chamber 50b, flows out from the outlet 22a, and flows into the suction port 7c. . The oil that has flowed into the pump chamber through the suction port 7c is set to a high pressure in the pump chamber, then discharged to the discharge port 7d, then passes through an oil filter, and passes through a main gallery formed in the cylinder block 3 to each oil. It is supplied to lubrication points such as bearings and sliding parts. The oil after lubricating the lubrication points returns to the oil pan 1 via the return oil passage and the crankcase.
[0045]
Incidentally, the first case 10 and the second case 20 are welded by a hot plate welding method. Therefore, the first case 10 and the second case 20 in which the filtering member 40 is held by the holding portion 26 have the mounting surface 33 horizontal and the first and second facing surfaces 13 and 23 parallel to each other. With the first and second jigs 61 and 62 in contact with the contact surfaces 17, 18b, 27, 28b and 38 of the first and second cases 10, 20 respectively. Are fixed to a first jig 61 fixed to a fixed base and a second jig 62 fixed to a movable base that can reciprocate in the moving direction. At this time, the first joint portion 14 and the second joint portion 24 that are separated from each other face each other in the moving direction of the second jig 62 (the pressing direction and the first direction A1 are the same in this embodiment). Occupies a position to be.
[0046]
In this state, in the first, second, and third joints 14, 24, and 44, the distal end surfaces 14a, 24a, and 44a that are the end faces of the first, second, and third joints 14, 24, and 44 (FIG. 5). , And a hot plate in contact with the first, second, and third joints 14, 24, and 44 until the molten portion including the portion forming the welded portion M exceeds the melting point and is in a molten state. (Not shown), and then the hot plate is removed.
[0047]
The state of the first, second, and third joints 14, 24, and 44 immediately before the start of welding is shown in FIGS. At the first, second, and third joint portions 14, 24, and 44 immediately before the start of welding, the attachment portion-side second joint portion 24t and the attachment portion-side second third joint portion 44t form the contact surface 27 or the contact surface. It protrudes in the pressing direction or the first direction A1 by a larger amount than the flange side second joint portion 24f with respect to 28b. On the other hand, the first joint portion 14 projects in the pressing direction or the first direction A1 with the same amount of protrusion over the entire circumference with respect to the contact surface 17 or the contact surface 18b. The distal end surface 24a of the second mounting portion 24t and the distal end surface 44a of the third mounting portion 44t are on the same plane.
[0048]
Therefore, the distal end surface 24a of the mounting portion side second bonding portion 24t and the distal end surface 44a of the mounting portion side third bonding portion 44t are welded to the mounting portion side second bonding portion 24t and the mounting portion side third bonding portion 44t. The distance Dt between the distal end surface 14a of the first joint portion 14 and the distal end surface 14a in the pressing direction is determined by the distal end surface 24a of the flange side second joint portion 24f, the distal end surface 44a of the flange side third joint portion 44f, and the flange side second end. The distance Df in the pressing direction between the joint 24f and the distal end surface 14a of the first joint 14 welded to the flange-side third joint 44f is set to be smaller.
[0049]
Immediately before the start of welding, the width W2t of the distal end surface 24a of the mounting portion side second joint portion 24t is welded to the width W2f of the distal end surface 24a of the flange side second joint portion 24f and the flange side second joint portion 24f. The width W1f of the distal end surface 14a of the first joint portion 14 and the width W1t of the distal end surface 14a of the first joint portion 14 welded to the mounting-side second joint portion 24t are set to be smaller. Note that the width W3 of each of the distal end surface 44a of the mounting portion-side third joint portion 44t and the distal end surface 44a of the flange-side third joint portion 44f is set to be equal.
[0050]
Thereafter, the second jig 62 is filtered in a state where the distal end surface 14a of the first joint portion 14 and the distal end surface 44 of the third joint portion 44 face the distal end surface 24a of the second joint portion 24 in the pressing direction. In a direction in which the second case 20 holding the member 40 is moved relatively closer to the first case 10, the second case 20 is moved while holding the second case 20, and the first joint 14 and the second joint 24 and the The first jig 61 and the second jig 62 are respectively brought into contact with the first case 10 by abutting the member 40 and moving together with the second case 20 so that the two cases 10 and 20 are relatively close to each other. The first, second, and second contact surfaces 17 and 18b and the contact surfaces 27, 28b, and 38 of the second case 20 are pressurized, and the portions including the distal end surfaces 14a, 24a, and 44a are all in a molten state. 3 At the joints 14, 24, 44 in the pressing direction By applying pressure, the first joint portion 14 and the second joint portion 24 and the third joint portion 44 are welded to form a welded portion M over a predetermined range in the pressing direction or the first direction A1. Is done.
[0051]
Next, the operation and effect of the embodiment configured as described above will be described.
The first joint portion 14 of the first flange 11 of the first case 10 which is a molded product of a thermoplastic resin and the second joint portion 24 of the second peripheral portion C2 of the second case 20 which is a molded product of a thermoplastic resin. In manufacturing the oil strainer S to be welded at the welded portion M, a mounting portion 30 having a mounting surface 33 at a tip portion is integrally formed with the second case 20, and the mounting portion 30 is mounted on the first case 10 and the second case 20. The contact surfaces 17, 18b and the contact surfaces 27, 28b, 38 facing the first direction A1, which is a direction orthogonal to the surface 33, are formed, respectively, and the second peripheral portion C2 has the contact surface 27. The second flange 21 includes a base end portion 31 of a mounting portion 30 formed at a portion where the second flange 21 is missing. The base end portion 31 has a welded portion that is larger than the mounting surface 33 in the first direction A1. M or a position close to the intermediate position. A second convex portion 28 having a surface 28b is formed, and the first and second jigs 61 and 62 are connected to the respective contact surfaces 17, 18b of the first case 10 and the respective contact surfaces 27 of the second case 20. , 28b, 38, and the first and second joints 14, 24 and the third joint 44 of the filter member 40, in which the portions including the distal end surfaces 14a, 24a, 44a are all in a molten state. Is applied, the first joint 14 and the second joint 24 are welded, and the first joint 14 and the third joint 44 are welded. Thus, in the mounting portion 30, the pressing force of the second jig 62 is more effective on the second joint portion 24 through the contact surface 28 b of the second convex portion 28 than in the case where the pressing force acts only on the mounting surface 33. The joint strength at the welded portion M of the first and second joints 14 and 24 is increased, required joint strength is ensured, and the first and second joints 14 and 24 are secured at the contact surface 38 of the mounting surface 33. Since the pressing force of the two jigs 62 can be reduced, it is possible to manufacture the oil strainer S in which deformation in the oil strainer S itself or the mounting surface 33 is prevented or largely suppressed. In addition, the second joint portion 24t of the base end portion 31 is formed at a position overlapping with the mounting surface 33 when viewed from the first direction A1, and is an oil strainer S on which the mounting portion 30 is formed. Thus, it is possible to manufacture the oil strainer S that can be arranged in a narrow space with the suppression of the formation.
[0052]
Further, when the oil strainer S is mounted on the oil pump 7, the outlet 22a and the suction port 7c of the oil pump 7 are connected in a liquid-tight state, and both mounting surfaces 7e1 and 33 constitute a sealing surface. Since the deformation of the mounting surface 33, which is a surface, is prevented or suppressed as described above, high sealing performance can be ensured at the connection between the oil strainer S and the oil pump 7.
[0053]
The second convex portion 28 is attached at a position including a portion of the base end portion 31 farthest from a virtual straight line L connecting both ends 21a and 21b of the second flange 21 when viewed from the first direction A1. In the part-side second joint part 24t, the second jig 62 through the second convex part 28 is provided at the part where the joint strength is most likely to be reduced because it is farthest from the contact surface 27 of the second flange 21. Can be applied, so that the bonding strength between the mounting portion side second bonding portion 24t and the first bonding portion 14 can be increased as a whole.
[0054]
Since the second convex portion 28 is formed to protrude from the base end portion 31, the rigidity of the mounting portion 30 is increased, so that the oil strainer S can be properly and stably mounted through the mounting portion 30. Further, at least at the base end portion 31 of the second peripheral portion C2, an outer varitrap groove 25 is formed outside the mounting portion side second joint portion 24t, and the second convex portion 28 is formed as an outer varitrap groove. Since the burrs F of the welded portion M do not protrude outside the base end portion 31 and the convex portion 28 by being integrally formed on the outer side wall 25a of the outer surface 25, the appearance of the oil strainer S is improved. Further, the first peripheral portion C1 and the second peripheral portion C2 are provided outside the first joint portion 14 and the second joint portion 24, and the outer burr trap grooves 15, 25 over the entire periphery of both the peripheral portions C1, C2. Is formed, the burrs F of the welded portion M are not exposed to the outside of the oil strainer S over the entire circumference of the first peripheral edge portion C1 and the second peripheral edge portion C2. Appearance is improved.
[0055]
Immediately before the start of welding, the distance Dt in the pressing direction between the distal end surface 24a of the mounting portion side second bonding portion 24t and the distal end surface 14a of the first bonding portion 14 welded to the mounting portion side second bonding portion 24t is The distance Df in the pressing direction between the distal end surface 24a of the flange-side second joint portion 24f and the distal end surface 14a of the first joint portion 14 welded to the flange-side second joint portion 24f is smaller than the distance Df. The range of formation of the welded portion M between the 1 joint portion 14 and the second joint portion 24t on the mounting portion side in the pressing direction is increased, so that it is easy to secure the joining strength at the second joint portion 24t on the attachment portion side, Moreover, the joining strength is further enhanced.
[0056]
Immediately before the start of welding, the width W2t of the distal end surface 24a of the mounting portion side second joint portion 24t is welded to the width W2f of the distal end surface 24a of the flange side second joint portion 24f and the flange side second joint portion 24. Is smaller than the width W1f of the distal end surface 14a of the first joining portion 14, the joining pressure between the first joining portion 14 and the second joining portion 24 t on the mounting portion side increases the joining pressure between the first joining portion 14 and the flange side. Since the pressure is higher than the bonding pressure between the second bonding portion 24f and the second bonding portion 24f, the diffusion phenomenon at the welded portion M between the first bonding portion 14 and the mounting portion-side second bonding portion 24t is further promoted. In this respect, it is easy to secure the bonding strength at the mounting-side second bonding portion 24t, and the bonding strength is further enhanced.
[0057]
Hereinafter, an embodiment in which a part of the configuration of the above-described embodiment is changed will be described with respect to the changed configuration.
A plurality of attachment portions may be formed on the second case 20, and attachment portions may be formed on the first case 10 and the second case 20, respectively. As for the jig, the first jig 61 may move and the second jig 62 may be fixed, or both jigs 61 and 62 may move.
[0058]
As shown in FIG. 7, the first and second convex portions 18 and 28 may have concave portions 18c and 28c formed on the contact surfaces 18b and 28b instead of the end surfaces 18a and 28a. As shown in FIG. 8, the recess may not be formed on the end surfaces 18a, 28a and the contact surfaces 18b, 28b. Furthermore, when the first and second convex portions 18 and 28 are formed, the rigidity of the first flange 11 or the rigidity of the mounting portion 30 from the base end portion 31 to the mounting flange 32 at the distal end portion is insufficient. As shown by the two-dot chain line in FIG. 4, ribs 19 and 29 connecting between the contact surface 18b and a part of the contact surface 28b and the outer peripheral surface of the first flange 11 and the outer peripheral surface of the mounting portion 30. May be provided respectively.
[0059]
Further, the positioning portions of the first and second cases 10 and 20 can be formed using the end surfaces 18a and 28a of the first and second convex portions 18 and 28. For example, as shown in FIG. 9, the fitting projection 18 d is formed on the end face 18 a of the first projection 18, and the fitting recess 28 d is formed on the end face 28 a of the second projection 28. Generally, in the first and second convex portions 18 and 28, welding is performed by forming a fitting convex portion on an end surface of one of the convex portions and forming a fitting concave portion on an end surface of the other convex portion. At times, the fitting projections can be fitted into the fitting recesses. Accordingly, the first case 10 and the second case 20 can be positioned at the time of welding, and the displacement between the first case 10 and the second case 20 at the time of welding can be reliably prevented.
[0060]
In the second case 20, the second flange 21 having the contact surface 27 is formed on the entire circumference of the second peripheral portion C2, so that the second convex portion 28 may not be provided. In the above embodiment, a pair of first and second projections 18 and 28 are formed in both cases 10 and 20 in a pair. , A second convex portion may be formed.
[0061]
The entire surface of the mounting surface 33 may be a contact surface with the second jig 62. In addition, in a case where a required bonding strength at the welded portion M between the mounting portion side second bonding portion 24t and the first bonding portion 14 is obtained only by the second convex portion 28 with which the second jig 62 contacts, The mounting surface 33 does not need to be a contact surface with which the second jig 62 contacts. Therefore, in this case, the pressurization by the second jig 62 on the mounting surface 33 is not required, so that deformation of the oil strainer S itself or the mounting portion 30 including the mounting surface 33 is prevented.
[0062]
Immediately before the start of welding, the width W1t of the distal end surface 14a of the first joint portion 14 to be welded to the mounting portion side second joint portion 24t is equal to the width W2f of the distal end surface 24a of the flange side second joint portion 24f and the flange side second joint portion 24f. The width may be set to be smaller than the width W1f of the distal end surface 14a of the first joint 14 welded to the second joint 24f. Also in this case, the joining pressure between the first joining portion 14 and the mounting portion-side second joining portion 24t is smaller than the joining pressure between the first joining portion 14 and the flange-side second joining portion 24f. Since the height is increased, it is easy to secure the bonding strength at the mounting-side second bonding portion 24t, and the bonding strength is further increased.
[0063]
The contact surface forming portion may be constituted by a concave portion having a bottom surface with which the first and second jigs 61 and 62 can contact, instead of the convex portion.
The welding may be performed by a welding method other than the hot plate welding method, for example, a vibration welding method, an ultrasonic welding method, or a laser welding method.
[0064]
The internal combustion engine provided with the oil strainer S is used for a vehicle in the above-described embodiment, but is used for a marine vessel propulsion device such as an outboard motor having a vertically oriented crankshaft. Is also good. Further, the oil strainer S may be provided in equipment other than the internal combustion engine.
[0065]
Although the oil strainer S is arranged in the oil pan 1 of the internal combustion engine, it may be an oil strainer used for equipment other than the internal combustion engine. Further, the component may be an article having a hollow portion other than the oil strainer.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of an internal combustion engine provided with an oil strainer which is an embodiment of the article of the present invention.
2A is an upper plan view, FIG. 2B is a side view, and FIG. 2C is a lower plan view of the oil strainer of FIG.
FIG. 3 is a sectional view taken along line III-III of FIG. 2;
FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;
FIG. 5 is an enlarged sectional view of a main part corresponding to FIG. 3, showing a state immediately before the start of welding.
FIG. 6 is an enlarged sectional view of a main part corresponding to FIG. 4, showing a state immediately before the start of welding.
FIG. 7 is a cross-sectional view of a principal part corresponding to FIG. 3, showing a first modified example of the projection.
FIG. 8 is a cross-sectional view of a principal part corresponding to FIG. 3, showing a second modification of the projection.
FIG. 9 is a cross-sectional view of a main part corresponding to FIG. 3, showing a third modification of the projection.
10A and 10B are schematic cross-sectional views for explaining a conventional technique, in which FIG. 10A shows a state in which flanges of two cases forming an article are pressed by a jig, and FIG. It shows a state in which a flange of one case is pressed by a jig and a mounting portion of the other case is respectively pressed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... oil pan, 2 ... lower block, 3 ... cylinder block, 4 ... piston, 5 ... connecting rod, 6 ... crankshaft, 7 ... oil pump, 8 ... stud bolt, 9 ... nut, 10 ... 1st case, 11 ... 1st flange, 12 ... inflow section, 13 ... 1st opposing surface, 14 ... 1st joining part, 15, 16 ... Vari trap groove, 17 ... contact surface, 18 ... 1st convex part, 19 ... rib,
Reference numeral 20 denotes a second case, 21 denotes a second flange, 22 denotes an outflow portion, 23 denotes a second opposing surface, 24 denotes a second joint portion, 25 denotes a burr trap groove, 26 denotes a holding portion, and 27 denotes a contact surface. 2nd convex part, 29 ... rib,
Reference numeral 30: mounting portion, 31: base end portion, 32: mounting flange, 33: mounting surface, 34: through hole, 35: bush, 36: mounting groove, 37: sealing member, 38: contact surface,
Reference numeral 40: filtering member, 41: third flange, 43: third facing surface, 44: third joining portion, 45: varitrap groove,
50: hollow portion, 61, 62: jig,
S: oil strainer, A1: first direction, A F ... direction of pressing force, C1, C2, C3 ... peripheral part, M ... welded part, H ... virtual plane, L ... virtual straight line, F ... burr, Df, Dt ... interval, W1f, W1t, W2f, W2t, W3 ... width.

Claims (5)

いずれも熱可塑性樹脂の成形品である第１部材および第２部材を備え、前記第１部材の第１周縁部および前記第２部材の第２周縁部に第１接合部および第２接合部がそれぞれ形成され、前記第１接合部と前記第２接合部とが溶着部で溶着された物品において、
前記第２部材には、先端部に取付面を有する取付部が一体成形されており、前記第１部材および前記第２部材には、前記取付面に直交する方向である第１方向に面すると共に溶着時に前記第１接合部および前記第２接合部に加圧力を作用させる治具が当接し得る当接面が形成されていて、前記第２周縁部は、前記当接面を有するフランジと、該フランジが欠如した部分に形成されている前記取付部の基端部とからなり、該基端部の前記第２接合部は、前記第１方向から見て前記取付面と重なる位置にあり、前記基端部には、前記第１方向で前記取付面よりも前記溶着部に近い位置にある前記当接面を有する当接面形成部が形成されていることを特徴とする物品。Each of the first and second members includes a first member and a second member which are molded products of a thermoplastic resin, and a first joint portion and a second joint portion are formed on a first peripheral portion of the first member and a second peripheral portion of the second member. In each of the articles formed, the first joint and the second joint are welded by a weld,
A mounting portion having a mounting surface at a distal end portion is integrally formed with the second member, and faces the first member and the second member in a first direction which is a direction orthogonal to the mounting surface. A contact surface with which a jig for applying a pressing force to the first joint portion and the second joint portion at the time of welding is formed, and the second peripheral portion is formed of a flange having the contact surface. And a base end of the mounting portion formed in a portion where the flange is missing, wherein the second joint portion of the base end is located at a position overlapping the mounting surface when viewed from the first direction. An article characterized in that a contact surface forming portion having the contact surface located closer to the welding portion than the mounting surface in the first direction is formed at the base end portion. 前記当接面形成部は、前記基端部から突出する凸部であり、前記第２周縁部の少なくとも前記基端部には、前記第２接合部よりも外側にバリトラップ溝が形成されており、前記凸部は、前記バリトラップ溝の外側の側壁に一体成形されていることを特徴とする請求項１記載の物品。The contact surface forming part is a convex part protruding from the base end part, and at least the base end part of the second peripheral part is formed with a burr trap groove outside the second joint part. The article according to claim 1, wherein the protrusion is integrally formed on a side wall outside the burr trap groove. いずれも熱可塑性樹脂の成形品である第１部材および第２部材を備え、前記第１部材の第１周縁部および前記第２部材の第２周縁部に第１接合部および第２接合部がそれぞれ形成され、前記第１接合部と前記第２接合部とが溶着部で溶着される物品の製造方法において、
前記第２部材には先端部に取付面を有する取付部が一体成形されており、前記第１部材および前記第２部材には、前記取付面に直交する方向である第１方向に面すると共に治具が当接する第１当接面および第２当接面がそれぞれ形成されていて、前記第２周縁部は、前記第２当接面を有するフランジと、該フランジが欠如した部分に形成されている前記取付部の基端部とからなり、該基端部の前記第２接合部は、前記第１方向から見て前記取付面と重なる位置に形成されており、前記基端部には、前記第１方向で前記取付面よりも前記溶着部に近い位置にある前記第２当接面を有する当接面形成部が形成されており、前記治具は、前記第１当接面および前記第２当接面に当接して、いずれも端面を含む部分が溶融状態とされた前記第１接合部および前記第２接合部に加圧力を作用させることにより、前記第１接合部と前記第２接合部とが溶着されることを特徴とする物品の製造方法。Each of the first and second members includes a first member and a second member which are molded products of a thermoplastic resin, and a first joint portion and a second joint portion are formed on a first peripheral portion of the first member and a second peripheral portion of the second member. In a method for manufacturing an article, each of which is formed and wherein the first joint and the second joint are welded at a weld.
A mounting portion having a mounting surface at a distal end portion is integrally formed with the second member, and the first member and the second member face in a first direction which is a direction orthogonal to the mounting surface. A first contact surface and a second contact surface with which the jig contacts are respectively formed, and the second peripheral portion is formed on a flange having the second contact surface and a portion where the flange is missing. And the second joint portion of the base portion is formed at a position overlapping the mounting surface when viewed from the first direction, and the base end portion has A contact surface forming portion having the second contact surface located closer to the welding portion than the mounting surface in the first direction; and the jig includes the first contact surface and the first contact surface. The first joint portion in which a portion including an end surface is brought into a molten state in contact with the second contact surface. By exerting pressure on the spare second joint method of manufacturing an article in which the first joint portion and the second joint portion is characterized in that it is welded. 溶着開始直前において、前記基端部の前記第２接合部の端面と、前記基端部の前記第２接合部に溶着される前記第１接合部の端面との加圧方向での間隔は、前記フランジの前記第２接合部の端面と、前記フランジの前記第２接合部に溶着される前記第１接合部の端面との加圧方向での間隔よりも小さいことを特徴とする請求項３記載の物品の製造方法。Immediately before the start of welding, the distance in the pressing direction between the end surface of the second joint portion of the base end portion and the end surface of the first joint portion welded to the second joint portion of the base end portion is: 4. The distance between the end face of the second joint portion of the flange and the end face of the first joint portion welded to the second joint portion of the flange in a pressing direction is smaller than that of the flange. A method for producing the article according to the above. 溶着開始直前において、前記基端部の前記第２接合部の端面および前記基端部の前記第２接合部に溶着される前記第１接合部の端面の少なくとも一方の端面の幅は、前記フランジの前記第２接合部の端面および前記フランジの前記第２接合部に溶着される前記第１接合部の端面の幅よりも狭いことを特徴とする請求項３または請求項４記載の物品の製造方法。Immediately before the start of welding, the width of at least one end face of the end face of the second joint part of the base end part and the end face of the first joint part welded to the second joint part of the base end part is the same as that of the flange. 5. The article according to claim 3, wherein the width of the end face of the first joint part welded to the end face of the second joint part and the end face of the first joint part welded to the second joint part of the flange is smaller than the width of the end face of the first joint part. Method.
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JP2006231875A (en) * 2005-02-28 2006-09-07 Gp Daikyo Corp Fluid filter means for vehicle and its manufacturing method
JP2008082257A (en) * 2006-09-28 2008-04-10 Daikyo Nishikawa Kk Oil strainer and method of manufacturing oil strainer
JP2013022568A (en) * 2011-07-25 2013-02-04 Toyota Boshoku Corp Fluid filter
JP2015059535A (en) * 2013-09-20 2015-03-30 ダイキョーニシカワ株式会社 Oil strainer
US9044697B2 (en) 2006-09-28 2015-06-02 Daikyonishikawa Corporation Oil strainer with fusion bonded body, integral filter, and bonding flash accommodation parts

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006231875A (en) * 2005-02-28 2006-09-07 Gp Daikyo Corp Fluid filter means for vehicle and its manufacturing method
JP4592446B2 (en) * 2005-02-28 2010-12-01 ダイキョーニシカワ株式会社 Vehicle fluid filter device and method of manufacturing the same
JP2008082257A (en) * 2006-09-28 2008-04-10 Daikyo Nishikawa Kk Oil strainer and method of manufacturing oil strainer
US9044697B2 (en) 2006-09-28 2015-06-02 Daikyonishikawa Corporation Oil strainer with fusion bonded body, integral filter, and bonding flash accommodation parts
JP2013022568A (en) * 2011-07-25 2013-02-04 Toyota Boshoku Corp Fluid filter
JP2015059535A (en) * 2013-09-20 2015-03-30 ダイキョーニシカワ株式会社 Oil strainer

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