JP4832239B2 - Oil strainer and method for producing oil strainer - Google Patents

Oil strainer and method for producing oil strainer Download PDF

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Publication number
JP4832239B2
JP4832239B2 JP2006264495A JP2006264495A JP4832239B2 JP 4832239 B2 JP4832239 B2 JP 4832239B2 JP 2006264495 A JP2006264495 A JP 2006264495A JP 2006264495 A JP2006264495 A JP 2006264495A JP 4832239 B2 JP4832239 B2 JP 4832239B2
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tubular body
inclined surface
welded
welding
flange
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JP2008082278A (en
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智志 榎田
俊哉 金安
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DaikyoNishikawa Corp
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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
    • 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
    • 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
    • B29C66/32—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
    • 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
    • B29C66/5416—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 perforated, e.g. a screen
    • 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
    • B29C66/80—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/14—Filters

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Filtration Of Liquid (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

本発明は、例えば、自動車の内燃機関等に設けられ、該内燃機関内を循環するオイルを濾過するオイルストレーナ及びそのオイルストレーナの製造方法に関する。   The present invention relates to an oil strainer that is provided in, for example, an internal combustion engine of an automobile and filters oil circulating in the internal combustion engine, and a method of manufacturing the oil strainer.

従来より、この種のオイルストレーナとして、例えば特許文献１に開示されているように、全体として筒状に形成されたケースと、このケースの内部に配設されたオイル濾過用のフィルタとで構成されたものが知られている。ケースは、樹脂製の第１管状体の端部と第２管状体の端部とを溶着してなる。第１管状体における溶着部分と反対側の端部にはオイル流入孔が形成され、第２管状体における溶着部分と反対側の端部にはオイル流出孔が形成されている。そして、第１管状体のオイル流入孔からから吸い込まれたオイルがフィルタを通過することで濾過された後、第２管状体のオイル流出孔から外部に流出する。
特開２００２−２１０３１０号公報 Conventionally, as an oil strainer of this type, as disclosed in, for example, Patent Document 1, a case formed in a cylindrical shape as a whole, and a filter for oil filtration disposed inside the case Is known. The case is formed by welding the end of the first tubular body made of resin and the end of the second tubular body. An oil inflow hole is formed at the end of the first tubular body opposite to the welded portion, and an oil outflow hole is formed at the end of the second tubular body opposite to the welded portion. Then, after the oil sucked from the oil inflow hole of the first tubular body is filtered by passing through the filter, it flows out from the oil outflow hole of the second tubular body to the outside.
Japanese Patent Laid-Open No. 2002-210310

ところで、特許文献１のように２つの管状体を溶着する場合に、スピン溶着法を用いることが考えられる。このスピン溶着法とは、例えば、第２管状体を固定しておき、第１管状体をその中心線周りに回転させながら、第１管状体の端部を第２管状体の端部に押し付けることにより、両管状体の端部を摩擦熱で溶融させ、その後、回転を停止し、溶融した部分が固化するまで保持するという溶着法であり、例えば、熱板溶着法等に比べて、設備費が安価で、生産タクトが短いという利点がある。従って、特許文献１のオイルストレーナを製造する際に、スピン溶着法を用いることで、オイルストレーナの低コスト化が図られる。   By the way, when welding two tubular bodies like patent document 1, it is possible to use a spin welding method. In this spin welding method, for example, the second tubular body is fixed, and the end of the first tubular body is pressed against the end of the second tubular body while rotating the first tubular body around its center line. This is a welding method in which the ends of both tubular bodies are melted by frictional heat, and then the rotation is stopped and the melted portion is held until solidified, for example, compared to a hot plate welding method, etc. There are advantages of low cost and short production tact. Therefore, when manufacturing the oil strainer of Patent Document 1, the cost of the oil strainer can be reduced by using the spin welding method.

しかしながら、第１管状体や第２管状体には所定の範囲内で製造公差が生じるものである。この製造公差によって、第１管状体の端部と第２管状体の端部とを合わせた際に、両端部の相対位置関係が正規の位置からずれてしまい、両端部が部分的に密着し難いことがある。この状態で第１管状体を回転させ続けても、両端部のうち密着し難い箇所では摩擦熱が十分に上昇せずに、溶着不良を引き起こし、ひいては、第１管状体と第２管状体との溶着強度が不足してしまう。   However, manufacturing tolerances are generated within a predetermined range in the first tubular body and the second tubular body. Due to this manufacturing tolerance, when the end portion of the first tubular body and the end portion of the second tubular body are combined, the relative positional relationship between the both end portions deviates from the normal position, and both end portions are partially adhered. It may be difficult. Even if the first tubular body is continuously rotated in this state, the frictional heat does not rise sufficiently at the places where the both ends are difficult to adhere, causing poor welding, and consequently the first tubular body and the second tubular body, The welding strength is insufficient.

本発明は斯かる点に鑑みてなされたものであり、その目的とするところは、ケースを構成する第１管状体及び第２管状体をスピン溶着法により溶着して低コスト化を図る場合に、溶着不良が生じないようにして、溶着強度を十分に得ることにある。   The present invention has been made in view of such points, and the object of the present invention is to reduce the cost by welding the first tubular body and the second tubular body constituting the case by a spin welding method. It is to obtain sufficient welding strength by preventing welding failure.

上記目的を達成するために、請求項１の発明では、第１管状体の端部と第２管状体の端部とを溶着してなるケースと、該ケース内に配設されたオイル濾過用のフィルタとを備えたオイルストレーナであって、上記フィルタは、有底筒状をなし、底壁部と反対側の開口周縁部には径方向外方へ延びるフランジが形成され、上記第１管状体の端部には、上記第２管状体へ向けて突出し円環状に延びる第１溶着部が形成され、上記第２管状体の端部には、上記第１管状体へ向けて突出し上記第１溶着部に沿うように円環状に延びる第２溶着部と、該第２溶着部の内側において上記フィルタのフランジが嵌る段差部とが形成され、上記第１溶着部の突出方向先端側には、径方向内方へ行くほど上記第２管状体側に位置するように該第１溶着部の中心線に対し傾斜した第１傾斜面部が中心線周りに環状に形成され、上記第２溶着部の突出方向先端側には、上記第１傾斜面部に沿うように、該第２溶着部の径方向外方に行くほど第１管状体側に位置するように延びる第２傾斜面部が中心線周りに環状に形成され、上記第１傾斜面部の径方向内縁部は、上記第２傾斜面部の径方向内縁部よりも内方まで延びており、上記第１傾斜面部における径方向内縁部が上記フィルタのフランジに接触して該フランジが上記段差部に押さえ付けられて該フィルタが保持され、該第１傾斜面部の内縁部と上記フランジとの間に内側溶着バリ収容部が構成され、上記第１傾斜面部が上記第２溶着部に対しスピン溶着法により溶着されて上記第１管状体と上記第２管状体とが一体化されている構成とする。 In order to achieve the above object, according to the first aspect of the present invention, there is provided a case in which the end portion of the first tubular body and the end portion of the second tubular body are welded, and an oil filter disposed in the case. The filter has a bottomed cylindrical shape, and a flange extending outward in the radial direction is formed on the opening peripheral edge opposite to the bottom wall portion, and the first tubular A first welded portion that protrudes toward the second tubular body and extends in an annular shape is formed at an end of the body, and protrudes toward the first tubular body at the end of the second tubular body. A second welded portion that extends in an annular shape along the one welded portion and a stepped portion that fits the flange of the filter inside the second welded portion are formed on the front end side in the protruding direction of the first welded portion. , the center line of the first welded portion so as to be positioned in the second tubular body side toward the radially inward Against the inclined first inclined surface portion has is formed annularly around the center line, said the protruding forward end side of the second weld portion, along the said first inclined surface portion, radially outward of the second weld portion A second inclined surface portion extending so as to be positioned closer to the first tubular body is formed in an annular shape around the center line, and the radially inner edge portion of the first inclined surface portion is more than the radially inner edge portion of the second inclined surface portion. The inner edge of the first inclined surface portion in contact with the flange of the filter, the flange is pressed against the stepped portion, and the filter is held. An inner welding burr accommodating portion is formed between the inner edge portion and the flange, and the first inclined surface portion is welded to the second welding portion by a spin welding method, and the first tubular body and the second tubular body are formed. Are integrated .

請求項２の発明では、請求項１の発明において、第２溶着部の突出方向先端面における径方向外縁部は、第１溶着部の突出方向先端面における径方向外縁部よりも外方まで延びており、上記第２溶着部の先端面における外縁部と第１管状体との間に外側溶着バリ収容部が構成されているものとする。 According to a second aspect of the present invention, in the first aspect of the present invention, the radially outer edge portion of the second welded portion in the projecting direction front end surface extends further outward than the radially outer edge portion of the first welded portion projecting direction front end surface. It is assumed that an outer welding burr accommodating portion is formed between the outer edge portion of the tip end surface of the second welding portion and the first tubular body.

請求項３の発明では、請求項１または２の発明において、第１管状体の端部には、第１溶着部よりも内側及び外側に、それぞれ、第２管状体へ向けて突出する内側環状壁部及び外側環状壁部が設けられている構成とする。 In the invention of claim 3, in the invention of claim 1 or 2 , the end portion of the first tubular body has an inner annular shape projecting toward the second tubular body on the inner side and the outer side of the first welded portion, respectively. The wall portion and the outer annular wall portion are provided.

請求項４の発明では、上記フィルタは、有底筒状をなし、底壁部と反対側の開口周縁部には径方向外方へ延びるフランジが形成されており、上記第１管状体の端部に、上記第２管状体へ向けて突出し円環状に延びる第１溶着部を形成し、該第１溶着部の突出方向先端側に、径方向内方へ行くほど上記第２管状体側に位置するように該第１溶着部の中心線に対し傾斜した第１傾斜面部を中心線周りに環状に形成する第１溶着部形成工程と、上記第２管状体の端部に、上記第１管状体へ向けて突出し上記第１溶着部に沿うように円環状に延びる第２溶着部と、該第２溶着部の内側において上記フィルタのフランジが嵌る段差部とを形成するとともに、上記第２溶着部の突出方向先端側には、上記第１傾斜面部に沿うように、該第２溶着部の径方向外方に行くほど第１管状体側に位置するように延びる第２傾斜面部を中心線周りに環状に形成する第２溶着部形成工程と、上記第１溶着部形成工程と上記第２溶着部形成工程の後、上記フィルタのフランジを上記第２管状体の段差部に嵌め、上記第１傾斜面部を上記第２溶着部に対しスピン溶着法により溶着し、上記第１管状体と上記第２管状体とを一体化する溶着工程とを備え、上記溶着工程では、上記第１傾斜面部の径方向内縁部は、上記第２傾斜面部の径方向内縁部よりも内方まで延びており、上記第１傾斜面部における径方向内縁部を上記フランジに接触させて該フランジを上記段差部に押さえ付けて該フィルタを保持するとともに、上記第１傾斜面部の内縁部と上記フランジとの間に内側溶着バリ収容部を構成するものとする。 According to a fourth aspect of the present invention, the filter has a bottomed cylindrical shape, and a flange extending outward in the radial direction is formed on the opening peripheral edge on the opposite side to the bottom wall, and the end of the first tubular body is formed. A first welded portion that protrudes toward the second tubular body and extends in an annular shape is formed in the portion, and is positioned closer to the second tubular body toward the distal end side in the projecting direction of the first welded portion as it goes radially inward. A first welded portion forming step of forming a first inclined surface portion inclined with respect to the centerline of the first welded portion in an annular shape around the centerline, and the first tubular portion at the end of the second tubular body a second weld extending annularly along the projecting the first welded portion toward the body, thereby forming a stepped portion in which the flange is fitted in the filter inside the second weld portion, the second weld The radial direction of the second welded portion is along the first inclined surface portion on the front end side in the protruding direction of the portion. A second weld portion forming step of forming annularly second inclined surface centerline around the that extent extending so as to be positioned on the first tubular side go towards, the first weld portion forming step and the second welding portion forming step Thereafter, the flange of the filter is fitted into the step portion of the second tubular body, the first inclined surface portion is welded to the second welded portion by a spin welding method, and the first tubular body and the second tubular body. In the welding step, the radially inner edge portion of the first inclined surface portion extends inward from the radially inner edge portion of the second inclined surface portion, and A radially inner edge portion of the inclined surface portion is brought into contact with the flange to hold the filter by pressing the flange against the step portion, and an inner weld burr is accommodated between the inner edge portion of the first inclined surface portion and the flange. Part .

請求項１の発明によれば、第１管状体と第２管状体とを溶着する際、第１管状体の第１傾斜面部が第１溶着部の中心線に対し傾斜して環状に延びているので、該第１傾斜面部を第２溶着部に押し付けて中心線周りに回転させると、第１溶着部と第２溶着部との中心線がずれていても、これら中心線が一致するように第２溶着部が第１傾斜面部に沿って相対変位し、両溶着部の相対位置が矯正されて正規の状態となる。これにより、第１溶着部と第２溶着部とを全周に亘って密着させることができるので、溶着不良が起こるのを回避でき、第１管状体と第２管状体との溶着強度を十分に得ることができる。   According to invention of Claim 1, when welding a 1st tubular body and a 2nd tubular body, the 1st inclined surface part of the 1st tubular body inclines with respect to the centerline of a 1st welding part, and is extended cyclically | annularly. Therefore, when the first inclined surface portion is pressed against the second welded portion and rotated around the center line, even if the center lines of the first welded portion and the second welded portion are misaligned, the centerlines match. In addition, the second welded portion is relatively displaced along the first inclined surface portion, and the relative positions of the two welded portions are corrected and a normal state is obtained. As a result, the first welded portion and the second welded portion can be brought into close contact with each other over the entire circumference, so that the occurrence of poor welding can be avoided, and the welding strength between the first tubular body and the second tubular body is sufficient. Can get to.

また、第１傾斜面部と第２傾斜面部とを溶着する際、両傾斜面部の合わせ部から溶着バリが発生するが、第１傾斜面部の内縁部が第２傾斜面部の内縁部よりも内方まで延びているので、発生した溶着バリは、第１傾斜面部の内縁部に沿って内側溶着バリ収容部まで延び、該溶着バリ収容部に収容されることになる。これにより、溶着バリがケースの溶着部分から内側へ出にくくなり、クリーンなオイルストレーナを得ることができる。 Further , when the first inclined surface portion and the second inclined surface portion are welded, welding burrs are generated from the joint portion of both inclined surface portions, but the inner edge portion of the first inclined surface portion is inward of the inner edge portion of the second inclined surface portion. Therefore, the generated welding burr extends along the inner edge portion of the first inclined surface portion to the inner welding burr accommodating portion and is accommodated in the welding burr accommodating portion. Thereby, it becomes difficult for the welding burr to come out from the welded portion of the case to the inside, and a clean oil strainer can be obtained.

請求項２の発明によれば、第２溶着部の先端面における外縁部が第１溶着部の先端面における外縁部よりも外方まで延びているので、溶着バリは、第２溶着部の先端面における外縁部に沿って外側溶着バリ収容部まで延び、該溶着バリ収容部に収容されることになる。これにより、溶着バリがケースの溶着部分から外側へ出にくくなり、クリーンなオイルストレーナを得ることができる。 According to the invention of claim 2 , since the outer edge portion at the tip end surface of the second welded portion extends further outward than the outer edge portion at the tip end surface of the first welded portion, the weld burr is the tip of the second welded portion. It extends to the outer side welding burr accommodating part along the outer edge part in a surface, and is accommodated in this welding burr accommodating part. Thereby, it becomes difficult for a welding burr to come out from the welding part of a case, and a clean oil strainer can be obtained.

請求項３の発明によれば、第１溶着部及び第２溶着部を溶着する際に、該溶着部の内側へ向けて延びるように発生した溶着バリは、該溶着部と内側環状壁部との間に収容され、また、外側へ向けて延びるように発生した溶着バリは、該溶着部と外側環状壁部との間に収容される。これにより、溶着バリがケースの内側及び外側へ出なくなるので、より一層クリーンなオイルストレーナを得ることができる。 According to the invention of claim 3 , when welding the first welded portion and the second welded portion, the welding burr generated so as to extend toward the inside of the welded portion is the welded portion and the inner annular wall portion. In addition, the welding burr generated so as to extend outward is accommodated between the welded portion and the outer annular wall portion. Thereby, since the welding burr does not come out to the inside and the outside of the case, an even cleaner oil strainer can be obtained.

請求項４の発明によれば、溶着工程において、請求項１の発明と同様に、第１溶着部と第２溶着部との中心線が一致するように第２溶着部が第１傾斜面部に沿って相対変位し、両溶着部の相対位置が矯正されて正規の状態となる。これにより、溶着不良が起こるのを回避でき、第１管状体と第２管状体との溶着強度を十分に得ることができる。 According to the invention of claim 4 , in the welding step, as in the invention of claim 1, the second welded portion is formed on the first inclined surface portion so that the center lines of the first welded portion and the second welded portion coincide with each other. The relative position of both welds is corrected and a normal state is obtained. Thereby, it is possible to avoid the occurrence of poor welding and to sufficiently obtain the welding strength between the first tubular body and the second tubular body.

以下、本発明の実施形態を図面に基づいて詳細に説明する。尚、以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

図１は、本発明の実施形態に係るオイルストレーナ１を示すものである。このオイルストレーナ１は、オイルを濾過するための濾過部材としてフィルタ２（図２に示す）と、該フィルタ２を収容するケース３とを備えており、例えば、図示しないが、自動車のエンジンのオイル貯留空間を構成するオイルパン内に配置されてシリンダブロックに取り付けられている。上記ケース３は、シリンダブロックに取り付けられた状態で略上下方向に延びる円筒形状をなし、上下方向の中間位置で分割され、その上側を構成する流出側管状体１０と、下側を構成する流入側管状体１１とからなっている。これら流出側管状体１０及び流入側管状体１１は樹脂製である。流出側管状体１０の上下寸法は、流入側管状体１１の上下寸法よりも長く設定されていて、ケース３の分割面は、該ケース３の下側寄りに位置している。流出側管状体１０の内部に上記フィルタ２が配置された状態で、該流出側管状体１０の中心線方向一端部である下端部と、流入側管状体１１の中心線方向一端部である上端部とが溶着されている。上記流入側管状体１１が第１管状体であり、流出側管状体１０が第２管状体である。   FIG. 1 shows an oil strainer 1 according to an embodiment of the present invention. The oil strainer 1 includes a filter 2 (shown in FIG. 2) as a filter member for filtering oil, and a case 3 that accommodates the filter 2. For example, although not shown, the oil of an automobile engine It arrange | positions in the oil pan which comprises the storage space, and is attached to the cylinder block. The case 3 has a cylindrical shape extending substantially in the vertical direction when attached to the cylinder block, and is divided at an intermediate position in the vertical direction, and an outflow side tubular body 10 constituting the upper side and an inflow constituting the lower side. It consists of a side tubular body 11. The outflow side tubular body 10 and the inflow side tubular body 11 are made of resin. The vertical dimension of the outflow side tubular body 10 is set to be longer than the vertical dimension of the inflow side tubular body 11, and the dividing surface of the case 3 is located closer to the lower side of the case 3. In the state where the filter 2 is disposed inside the outflow side tubular body 10, the lower end portion which is one end portion in the center line direction of the outflow side tubular body 10 and the upper end portion which is one end portion in the center line direction of the inflow side tubular body 11. The part is welded. The inflow side tubular body 11 is a first tubular body, and the outflow side tubular body 10 is a second tubular body.

上記流出側管状体１０の上部には、屈曲部１３が形成されている。流出側管状体１０の上端開口部は、エンジンに設けられたオイルポンプの吸入口（図示せず）に接続されるようになっており、ケース３内のオイルを流出させるオイル流出口１０ａを構成している。この流出側管状体１０の上端部には、オイル流出口１０ａを囲むようにフランジ１４が形成されている。このフランジ１４には、エンジンのシリンダブロックへの締結用の締結部材（図示せず）が挿通する挿通孔１４ａが形成されるとともに、シール部材としてのＯリング（図示せず）が嵌め込まれる溝１４ｂが上記オイル流出口１０ａを囲むように形成されている。上記流出側管状体１０の屈曲部１３よりも下側は略直線状に延びている。流出側管状体１０の上下方向略中央部よりも下側には、上記フィルタ２を収容するフィルタ収容部１５が形成されている。このフィルタ収容部１５は、フィルタ２の外径に対応して流出側管状体１０の上部よりも拡径されている。   A bent portion 13 is formed in the upper part of the outflow side tubular body 10. The upper end opening of the outflow side tubular body 10 is connected to an inlet (not shown) of an oil pump provided in the engine, and constitutes an oil outlet 10a for allowing the oil in the case 3 to flow out. is doing. A flange 14 is formed at the upper end of the outflow side tubular body 10 so as to surround the oil outlet 10a. The flange 14 is formed with an insertion hole 14a through which a fastening member (not shown) for fastening to the cylinder block of the engine is inserted, and a groove 14b into which an O-ring (not shown) as a seal member is fitted. Is formed so as to surround the oil outlet 10a. The lower side of the bent portion 13 of the outflow side tubular body 10 extends substantially linearly. A filter housing portion 15 for housing the filter 2 is formed below the substantially central portion in the vertical direction of the outflow side tubular body 10. The filter accommodating portion 15 is expanded in diameter from the upper portion of the outflow side tubular body 10 corresponding to the outer diameter of the filter 2.

上記流出側管状体１０の下端部には、径方向外方へ延出する流出側延出部２０が全周に亘って形成されている。図２に示すように、流出側延出部２０の流入側の面には、該延出部２０の幅方向中間部に、流入側管状体１１へ向けて突出する流出側溶着部２１が全周に亘って円環状に形成されている。この流出側溶着部２１の中心線は、流出側管状体１０のフィルタ収容部１５の中心線と一致している。また、流出側延出部２０の内周側には、流出側溶着部２１によって段差部２２が形成されている。   An outflow side extending portion 20 extending outward in the radial direction is formed at the lower end portion of the outflow side tubular body 10 over the entire circumference. As shown in FIG. 2, on the inflow side surface of the outflow side extension portion 20, an outflow side weld portion 21 that protrudes toward the inflow side tubular body 11 is entirely formed in the intermediate portion in the width direction of the extension portion 20. It is formed in an annular shape over the circumference. The center line of the outflow side weld portion 21 coincides with the center line of the filter housing portion 15 of the outflow side tubular body 10. Further, a stepped portion 22 is formed by the outflow side welding portion 21 on the inner peripheral side of the outflow side extending portion 20.

図３にも示すように、上記流出側溶着部２１の突出方向先端側には、該溶着部２１の中心線に対して傾斜した流出側傾斜面部２１ａが中心線周りに環状に形成されている。この流出側傾斜面部２１ａの傾斜方向は、径方向外方へ行くほど流入側管状体１１側に位置する方向とされている。また、流出側溶着部２１の突出方向先端面における外周縁部は、径方向に延びる平坦面２１ｂで構成されている。この流出側傾斜面部２１ａを形成することにより、上記流出側溶着部２１は、突出方向先端側へ行くほど内径が大きくなっている。上記流出側溶着部２１が本発明の第２溶着部であり、流出側傾斜面部２１ａが本発明の第２傾斜面部である。また、図示しないが、流出側管状体１０には、後述の第１治具Ａ１に係合する突起が形成されている。   As shown in FIG. 3, an outflow side inclined surface portion 21 a that is inclined with respect to the center line of the welded portion 21 is formed in an annular shape around the centerline on the front end side in the protruding direction of the outflow side welded portion 21. . The inclining direction of the outflow side inclined surface portion 21a is a direction positioned closer to the inflow side tubular body 11 as it goes outward in the radial direction. Moreover, the outer peripheral edge part in the protrusion direction front end surface of the outflow side welding part 21 is comprised by the flat surface 21b extended in radial direction. By forming the outflow side inclined surface portion 21a, the outflow side welded portion 21 has an inner diameter that increases toward the front end side in the protruding direction. The outflow side weld portion 21 is the second weld portion of the present invention, and the outflow side inclined surface portion 21a is the second inclined surface portion of the present invention. Although not shown, the outflow side tubular body 10 is formed with a protrusion that engages with a first jig A1 described later.

一方、図１及び図２に示すように、上記流入側管状体１１は、全体として、上記流出側管状体１０のフィルタ収容部１５よりも小径に形成され、略直線状に延びている。流入側管状体１１の下端開口部は、オイルパン内のオイルをケース３に流入させるためのオイル流入口１１ａを構成している。流入側管状体１１の上端部には、径方向外方へ延出する流入側延出部２５が全周に亘って形成されている。流入側延出部２５の流出側の面には、その内縁部及び外縁部から流出側管状体１０側へそれぞれ突出する内側環状壁部２６及び外側環状壁部２７が設けられている。内側環状壁部２６の突出方向の寸法は、外側環状壁部２７の突出方向の寸法よりも短く設定されている。また、これら環状壁部２６、２７の肉厚は、流入側延出部２５の肉厚よりも薄くなっている。   On the other hand, as shown in FIGS. 1 and 2, the inflow side tubular body 11 is formed to have a smaller diameter than the filter accommodating portion 15 of the outflow side tubular body 10 as a whole, and extends substantially linearly. The lower end opening of the inflow side tubular body 11 constitutes an oil inflow port 11 a for allowing the oil in the oil pan to flow into the case 3. An inflow side extending portion 25 extending outward in the radial direction is formed at the upper end portion of the inflow side tubular body 11 over the entire circumference. On the outflow side surface of the inflow side extending portion 25, an inner annular wall portion 26 and an outer annular wall portion 27 that protrude from the inner edge portion and the outer edge portion to the outflow side tubular body 10 side are provided. The dimension of the inner annular wall portion 26 in the protruding direction is set to be shorter than the dimension of the outer annular wall portion 27 in the protruding direction. Further, the thickness of the annular wall portions 26 and 27 is thinner than the thickness of the inflow side extending portion 25.

上記流入側延出部２５における内側及び外側環状壁部２６、２７の間には、流出側管状体１０へ向けて突出する流入側溶着部２８が全周に亘って円環状に形成されている。この流入側溶着部２８の中心線は、流出側溶着部２１の中心線と一致しているとともに、流入側溶着部２８の突出方向先端部と流出側溶着部２１の突出方向先端部とは対向するように位置付けられている。   Between the inner and outer annular wall portions 26 and 27 in the inflow side extension portion 25, an inflow side weld portion 28 protruding toward the outflow side tubular body 10 is formed in an annular shape over the entire circumference. . The center line of the inflow side weld portion 28 coincides with the center line of the outflow side weld portion 21, and the protrusion direction tip portion of the inflow side weld portion 28 and the protrusion direction tip portion of the outflow side weld portion 21 are opposed to each other. Is positioned to do.

図３に示すように、上記流入側溶着部２８の突出方向先端側には、該溶着部２８の中心線に対して傾斜した流入側傾斜面部２８ａが中心線周りに環状に形成されている。この流入側傾斜面部２８ａの傾斜方向は、径方向内方へ行くほど流出側管状体１０側に位置する方向とされており、流入側傾斜面部２８ａは流出側傾斜面部２１ａに沿うように延びている。この流入側傾斜面部２８ａを形成することにより、上記流入側溶着部２８は、突出方向先端側へ行くほど外径が小さくなっている。上記流入側溶着部２８が本発明の第１溶着部であり、流入側傾斜面部２８ａが本発明の第１傾斜面部である。また、図示しないが、流入側管状体１１には、後述の第２治具Ａ２に係合する突起が形成されている。   As shown in FIG. 3, an inflow side inclined surface portion 28 a that is inclined with respect to the center line of the weld portion 28 is formed in an annular shape around the center line at the front end side in the protruding direction of the inflow side weld portion 28. The inclining direction of the inflow side inclined surface portion 28a is a direction positioned closer to the outflow side tubular body 10 toward the inner side in the radial direction, and the inflow side inclined surface portion 28a extends along the outflow side inclined surface portion 21a. Yes. By forming the inflow side inclined surface portion 28a, the inflow side welded portion 28 has an outer diameter that decreases toward the distal end side in the protruding direction. The inflow side welded portion 28 is the first welded portion of the present invention, and the inflow side inclined surface portion 28a is the first inclined surface portion of the present invention. Although not shown, the inflow side tubular body 11 is formed with a protrusion that engages with a second jig A2 described later.

図２に示すように、上記流入側傾斜面部２８ａの径方向内縁部は、流出側傾斜面部２１ａの径方向内縁部よりも内方まで延びている。この流入側傾斜面部２８ａの内縁部と流出側管状体１０との間には、後述の溶着工程で発生する溶着バリを収容するための第１内側溶着バリ収容部Ｓ１が構成されている。また、流出側溶着部２１の突出方向先端面における径方向外縁部を構成する平坦面２１ｂは、流入側溶着部２８の突出方向先端面における径方向外縁部よりも外方まで延びている。この流出側溶着部２１の平坦面２１ｂと流入側管状体１１との間には、上記溶着バリを収容するための第１外側溶着バリ収容部Ｒ１が構成されている。   As shown in FIG. 2, the radially inner edge portion of the inflow side inclined surface portion 28a extends inward from the radially inner edge portion of the outflow side inclined surface portion 21a. Between the inner edge part of this inflow side inclined surface part 28a and the outflow side tubular body 10, the 1st inner side welding burr accommodating part S1 for accommodating the welding burr | flash generate | occur | produced at the below-mentioned welding process is comprised. Further, the flat surface 21 b constituting the radially outer edge portion at the protruding end surface of the outflow side welded portion 21 extends outward from the radially outer edge portion at the protruding end surface of the inflow side welded portion 28. Between the flat surface 21b of the outflow side weld portion 21 and the inflow side tubular body 11, a first outer weld burr accommodating portion R1 for accommodating the weld burrs is configured.

また、上記流出側溶着部２１と内側環状壁部２６との間には、第１内側溶着バリ収容部Ｓ１から洩れた溶着バリを収容するための第２内側溶着バリ収容部Ｓ２が構成されている。さらに、流出側溶着部２１と外側環状壁部２７との間には、第１外側溶着バリ収容部Ｒ１から洩れた溶着バリを収容するための第２外側溶着バリ収容部Ｒ２が構成されている。   Further, a second inner weld burr housing portion S2 for housing a weld burr leaked from the first inner weld burr housing portion S1 is formed between the outflow side weld portion 21 and the inner annular wall portion 26. Yes. Furthermore, between the outflow side weld portion 21 and the outer annular wall portion 27, a second outer weld burr accommodating portion R2 for accommodating a weld burr leaked from the first outer weld burr accommodating portion R1 is configured. .

また、上記フィルタ２は、全体としてフィルタ収容部１５の中心線に沿って延びる有底筒状をなしており、その底壁部側が上に位置するようにフィルタ収容部１５に配置されている。フィルタ２の底壁部及び周壁部には、オイル濾過用の網目を構成する網目部２ａが形成されている。フィルタ２の底壁部と反対側の開口側には、径方向外方へ延びるフランジ２ｂが形成されている。このフランジ２ｂの外径は、フィルタ収容部１５の内径よりも大きく、段差部２２に嵌るようになっている。また、上記網目部２ａには、リブ２ｃが設けられており、リブ２ｃ、網目部２ａ及びフランジ２ｂは、樹脂材によって一体成形されている。   The filter 2 has a bottomed cylindrical shape that extends along the center line of the filter housing portion 15 as a whole, and is disposed in the filter housing portion 15 so that the bottom wall portion side is located on the upper side. A mesh part 2 a constituting a mesh for oil filtration is formed on the bottom wall part and the peripheral wall part of the filter 2. On the opening side opposite to the bottom wall portion of the filter 2, a flange 2 b extending outward in the radial direction is formed. The outer diameter of the flange 2 b is larger than the inner diameter of the filter housing portion 15 and is fitted to the step portion 22. The mesh portion 2a is provided with ribs 2c, and the rib 2c, mesh portion 2a and flange 2b are integrally formed of a resin material.

次に、上記のように構成されたオイルストレーナ１の製造方法について説明する。始めに、上記流出側管状体１０及び流入側管状体１１を射出成形法により成形する。これが、本発明の第１溶着部形成工程及び第２溶着部形成工程に相当する。また、フィルタ２も射出成形法により成形しておく。   Next, the manufacturing method of the oil strainer 1 comprised as mentioned above is demonstrated. First, the outflow side tubular body 10 and the inflow side tubular body 11 are formed by an injection molding method. This corresponds to the first welded portion forming step and the second welded portion forming step of the present invention. The filter 2 is also molded by an injection molding method.

その後、流出側管状体１０と流入側管状体１１とをスピン溶着法により溶着して一体化する溶着工程に移る。このとき使用される溶着機は、従来から樹脂製品の組み立て現場で用いられている周知の構造のものであり、図３に示すように、上記流出側管状体１０を保持する第１治具Ａ１と、流入側管状体１１を保持する第２治具Ａ１と、第２治具Ａ２を流入側管状体１１の中心線周りに回転させるとともに、中心線方向に移動させる駆動装置（図示せず）とを備えている。上記第１治具Ａ１が第２治具Ａ２の下側に配置され、第２治具Ａ２の回転中心線は、第１治具Ａ１の中心線と一致して上下方向に延びている。   Then, it moves to the welding process which welds and integrates the outflow side tubular body 10 and the inflow side tubular body 11 by a spin welding method. The welding machine used at this time has a well-known structure that has been conventionally used at the assembly site of resin products. As shown in FIG. 3, the first jig A1 that holds the outflow side tubular body 10 is used. A second jig A1 that holds the inflow side tubular body 11 and a drive device (not shown) that rotates the second jig A2 around the center line of the inflow side tubular body 11 and moves it in the direction of the center line. And. The first jig A1 is disposed below the second jig A2, and the rotation center line of the second jig A2 is aligned with the center line of the first jig A1 and extends in the vertical direction.

溶着工程においては、上記流出側管状体１０の流出側溶着部２１側の開口から、上記フィルタ２を挿入していく。このフィルタ２のフランジ２ｂが流出側管状体１０の段差部２２に達して嵌ると、この段差部２２によりフィルタ２が位置決めされる。そして、流出側管状体１０を、流出側溶着部２１が上方に向いた状態で第１治具Ａ１に保持させる。また、流入側管状体１１を、流入側溶着部２８が下方に向いた状態で第２治具Ａ２に保持させる。つまり、溶着工程においては、流出側管状体１０と流入側管状体１１との位置関係が、完成品の使用状態に対し上下逆となっており、流出側管状体１０が下側に位置し、流入側管状体１１が上側に位置している。   In the welding step, the filter 2 is inserted from the opening on the outflow side welded portion 21 side of the outflow side tubular body 10. When the flange 2 b of the filter 2 reaches and fits the stepped portion 22 of the outflow side tubular body 10, the filter 2 is positioned by the stepped portion 22. Then, the outflow side tubular body 10 is held by the first jig A1 with the outflow side welded portion 21 facing upward. Further, the inflow side tubular body 11 is held by the second jig A2 with the inflow side welded portion 28 facing downward. That is, in the welding process, the positional relationship between the outflow side tubular body 10 and the inflow side tubular body 11 is upside down with respect to the use state of the finished product, and the outflow side tubular body 10 is positioned on the lower side, The inflow side tubular body 11 is located on the upper side.

このとき、一般に、流出側管状体１０及び流入側管状体１１には、所定の範囲内で製造公差が生じているものなので、この製造公差によって、流出側溶着部２１の中心線と流入側溶着部２８の中心線とが一致せずに、両溶着部２１、２８の相対位置関係が正規の状態からずれていることが多い。   At this time, generally, the outflow side tubular body 10 and the inflow side tubular body 11 have manufacturing tolerances within a predetermined range. Therefore, due to this manufacturing tolerance, the center line of the outflow side welding portion 21 and the inflow side welding are formed. In many cases, the relative positional relationship between the welded portions 21 and 28 is deviated from the normal state without matching the center line of the portion 28.

上記した状態で、第２治具Ａ２を下方（図３に白抜きの矢印で示す方向）へ移動させていくと、流入側管状体１１の流入側溶着部２８が流出側管状体１０の流出側溶着部２１に押し付けられる。この状態で流入側管状体１１を駆動装置により回転させる。このとき、流入側管状体１１の流入側傾斜面部２８ａが中心線に対し傾斜して環状に延びているとともに、流出側傾斜面部２１ａが流入側傾斜面部２８ａに沿うように傾斜して延びているので、流出側溶着部２１と流入側溶着部２８との中心線がずれていても、これらの中心線が一致するように流出側溶着部２１が流入側傾斜面部２８ａに沿って相対変位し、両溶着部２１、２８の相対位置が矯正されて正規の状態となる。これにより、流出側溶着部２１と流入側溶着部２８とが全周に亘って密着する。   When the second jig A2 is moved downward (in the direction indicated by the white arrow in FIG. 3) in the state described above, the inflow side welded portion 28 of the inflow side tubular body 11 flows out of the outflow side tubular body 10. It is pressed against the side welding part 21. In this state, the inflow side tubular body 11 is rotated by the driving device. At this time, the inflow side inclined surface portion 28a of the inflow side tubular body 11 is inclined with respect to the center line and extends in an annular shape, and the outflow side inclined surface portion 21a is inclined to extend along the inflow side inclined surface portion 28a. Therefore, even if the center line between the outflow side welded portion 21 and the inflow side welded portion 28 is shifted, the outflow side welded portion 21 is relatively displaced along the inflow side inclined surface portion 28a so that these centerlines coincide with each other. The relative positions of the welded portions 21 and 28 are corrected and a normal state is obtained. Thereby, the outflow side welding part 21 and the inflow side welding part 28 contact | adhere over the perimeter.

このように、流出側溶着部２１と流入側溶着部２８とが全周に亘って密着しているので、両溶着部２１、２８の合わせ部に全周に亘って同じように摩擦熱が発生して、両溶着部２１、２８が溶融する。その後、駆動装置による回転を停止し、溶融した部分が固化するまで保持することで、流出側管状体１０と流入側管状体１１とが一体化する。この溶着工程においては、流出側管状体１０の突起が第１治具Ａ１に係合しているので、流出側管状体１０が第１治具Ａ１に対して回転することなく固定され、また、流入側管状体１１の突起が第２治具Ａ２に係合しているので、流入側管状体１１が第２治具Ａ２に対して回転することなく固定される。   Thus, since the outflow side welded portion 21 and the inflowside welded portion 28 are in close contact with each other over the entire circumference, frictional heat is generated in the same manner over the entire circumference at the joint portion of the welded portions 21 and 28. As a result, the welded portions 21 and 28 are melted. Thereafter, the outflow side tubular body 10 and the inflow side tubular body 11 are integrated by stopping the rotation by the driving device and holding the melted portion until it is solidified. In this welding step, since the projection of the outflow side tubular body 10 is engaged with the first jig A1, the outflow side tubular body 10 is fixed without rotating with respect to the first jig A1, Since the protrusion of the inflow side tubular body 11 is engaged with the second jig A2, the inflow side tubular body 11 is fixed without rotating with respect to the second jig A2.

上記溶着工程では、流出側溶着部２１及び流入側溶着部２８においてケース３の内方へ向けて発生した溶着バリは、流入側傾斜面部２８ａの内縁部が流出側傾斜面部２１ａの内縁部よりも内方へ延びているので、流入側傾斜面部２８ａの内縁部に沿って第１内側溶着バリ収容部Ｓ１まで延び、該収容部Ｓ１に収容されることになる。この内方へ向けて延びる溶着バリが第１内側溶着バリ収容部Ｓ１よりも内方へ洩れた場合には、第２内側溶着バリ収容部Ｓ２に収容されるので、溶着バリがケース３の内部に脱落するのを抑制することが可能である。   In the welding step, the weld burr generated toward the inside of the case 3 at the outflow side weld portion 21 and the inflow side weld portion 28 is such that the inner edge portion of the inflow side inclined surface portion 28a is more than the inner edge portion of the outflow side inclined surface portion 21a. Since it extends inward, it extends to the first inner welding burr accommodating portion S1 along the inner edge of the inflow side inclined surface portion 28a and is accommodated in the accommodating portion S1. When the welding burr extending inwardly leaks inward from the first inner welding burr accommodating part S1, the welding burr is accommodated in the second inner welding burr accommodating part S2. It is possible to suppress falling off.

また、流出側溶着部１０及び流入側溶着部１１においてケース３の外方へ向けて発生した溶着バリは、流出側溶着部２１の平坦面２１ｂが流入側溶着部２８の先端面における内縁部よりも外方へ延びているので、平坦面２１ｂに沿って第１外側溶着バリ収容部Ｒ１まで延び、該収容部Ｒ１に収容されることになる。この外方へ向けて延びる溶着バリが第１外側溶着バリ収容部Ｒ１よりも外方へ洩れた場合には、第２外側溶着バリ収容部Ｒ２に収容されるので、溶着バリがケース３の外部に洩れるのを抑制することが可能である。   In addition, the welding burr generated toward the outside of the case 3 in the outflow side weld portion 10 and the inflow side weld portion 11 is such that the flat surface 21b of the outflow side weld portion 21 is from the inner edge portion of the front end surface of the inflow side weld portion 28. Since it also extends outward, it extends to the first outer welding burr accommodating portion R1 along the flat surface 21b and is accommodated in the accommodating portion R1. When the welding burr extending outwardly leaks outward from the first outer welding burr accommodating part R1, the welding burr is accommodated in the second outer welding burr accommodating part R2. It is possible to suppress the leakage.

また、フィルタ２のフランジ２ｂは、流入側溶着部２８の先端部によって流出側管状体１０の段差部２２に押さえ付けられ、これにより、フィルタ２がケース３内で保持される。   Further, the flange 2 b of the filter 2 is pressed against the stepped portion 22 of the outflow side tubular body 10 by the distal end portion of the inflow side weld portion 28, whereby the filter 2 is held in the case 3.

以上説明したように、この実施形態に係るオイルストレーナ１によれば、流出側管状体１０と流入側管状体１１とを溶着する際、流入側傾斜面部２８ａを流出側傾斜面部２１ａに押し付けて中心線周りに回転させるだけで、流出側溶着部２１と流入側溶着部２８との相対位置を正規の状態にできる。これにより、溶着不良が起こるのを回避でき、流出側管状体１０と流入側管状体１１との溶着強度を十分に確保することができる。   As described above, according to the oil strainer 1 according to this embodiment, when the outflow side tubular body 10 and the inflow side tubular body 11 are welded, the inflow side inclined surface portion 28a is pressed against the outflow side inclined surface portion 21a. The relative position between the outflow side weld portion 21 and the inflow side weld portion 28 can be brought into a normal state only by rotating around the line. Thereby, it is possible to avoid occurrence of poor welding, and it is possible to sufficiently secure the welding strength between the outflow side tubular body 10 and the inflow side tubular body 11.

また、溶着工程においてケース３の内方へ向かって発生した溶着バリを第１及び第２内側溶着バリ収容部Ｓ１、Ｓ２に収容でき、さらに、ケース３の外方へ向かって発生した溶着バリを第１及び第２外側溶着バリ収容部Ｒ１、Ｒ２に収容できる。これにより、溶着バリがケース３の内方や外方に洩れないクリーンなオイルストレーナ１を得ることができる。   Further, the welding burr generated toward the inside of the case 3 in the welding process can be accommodated in the first and second inner welding burr accommodating portions S1, S2, and further, the welding burr generated toward the outside of the case 3 can be accommodated. It can be accommodated in the first and second outer welding burr accommodating portions R1, R2. As a result, a clean oil strainer 1 in which weld burrs do not leak to the inside or outside of the case 3 can be obtained.

尚、また、図４に示す参考例のように、流入側管状体１１にフィルタ押さえ部３０を設けてもよい。このフィルタ押さえ部３０は、流入側延出部２５における内側環状壁部２６と流入側溶着部２８との間から流出側管状体１０へ向けて突出して円環状に延びており、先端部がフィルタ２のフランジ２ｂに当接するようになっている。フィルタ押さえ部３０の断面形状は、先端側へ向かって先細形状となっている。このフィルタ押さえ部３０を設けることによりフィルタ３をしっかりと押さえることができ、オイルの脈動等によるフィルタ３の振動を低減することができる。この場合、第２内側溶着バリ収容部Ｓ２は、フィルタ押さえ部３０と内側環状壁部２６との間に形成されている。 In addition, you may provide the filter holding | suppressing part 30 in the inflow side tubular body 11 like the reference example shown in FIG. The filter holding part 30 protrudes toward the outflow side tubular body 10 from between the inner annular wall part 26 and the inflow side weld part 28 in the inflow side extension part 25 and extends in an annular shape, and the tip part is a filter. 2 abuts against the flange 2b. The cross-sectional shape of the filter pressing portion 30 is tapered toward the tip side. By providing the filter pressing portion 30, the filter 3 can be firmly pressed, and vibration of the filter 3 due to oil pulsation or the like can be reduced. In this case, the second inner welding burr accommodating portion S2 is formed between the filter pressing portion 30 and the inner annular wall portion 26.

また、この実施形態では、流出側溶着部２１及び流入側溶着部２８にそれぞれ傾斜面部２１ａ、２８ａを設けているが、これに限らず、例えば、流出側溶着部２１の傾斜面部２１ａを省略してもよい。この場合において、溶着工程では、流出側溶着部２１と流入側溶着部２８との中心線がずれていても、これら中心線が一致するように流出側溶着部２１が流入側傾斜面部２８ａに沿って変位し、両溶着部２１、２８の相対位置が矯正されて正規の状態となる。 Moreover, in this embodiment, although the inclined surface parts 21a and 28a are provided in the outflow side welding part 21 and the inflow side welding part 28, respectively, it is not restricted to this, For example, the inclined surface part 21a of the outflow side welding part 21 is abbreviate | omitted. May be. In this case, in the welding step, even if the center line between the outflow side welded portion 21 and the inflow side welded portion 28 is shifted, the outflow side welded portion 21 extends along the inflow side inclined surface portion 28a so that these centerlines coincide. And the relative positions of the welded portions 21 and 28 are corrected and a normal state is obtained .

また、上記オイルストレーナ１は、内燃機関だけでなく、自動車の自動変速機や、他の動力機械等のオイル濾過部として使用することが可能である。   Further, the oil strainer 1 can be used not only as an internal combustion engine but also as an oil filtering unit for an automatic transmission of an automobile, other power machines, and the like.

以上説明したように、本発明に係るオイルストレーナは、例えば、内燃機関のオイルパン内に配設するのに適しており、本発明に係るオイルストレーナの製造方法は、例えば、その内燃機関用のオイルストレーナを製造するのに用いることができる。   As described above, the oil strainer according to the present invention is suitable for installation in, for example, an oil pan of an internal combustion engine, and the method for producing an oil strainer according to the present invention is, for example, for the internal combustion engine. It can be used to produce an oil strainer.

本発明の実施形態に係るオイルストレーナの斜視図である。It is a perspective view of the oil strainer which concerns on embodiment of this invention. 図１のＡ−Ａ線における断面図である。It is sectional drawing in the AA of FIG. オイルストレーナの製造工程を説明する図である。It is a figure explaining the manufacturing process of an oil strainer. 参考例に係る図２相当図である。FIG. 3 is a diagram corresponding to FIG. 2 according to a reference example.

１ オイルストレーナ
２ フィルタ
３ ケース
１０ 流出側管状体（第２管状体）
１１ 流入側管状体（第１管状体）
２１ 流出側溶着部（第２溶着部）
２１ａ 流出側傾斜面部（第２傾斜面部）
２６ 内側環状壁部
２７ 外側環状壁部
２８ 流入側溶着部（第１溶着部）
２８ａ 流入側傾斜面部（第１傾斜面部）
Ｓ１ 第１内側溶着バリ収容部
Ｒ１ 第２外側溶着バリ収容部 DESCRIPTION OF SYMBOLS 1 Oil strainer 2 Filter 3 Case 10 Outflow side tubular body (2nd tubular body)
11 Inflow side tubular body (first tubular body)
21 Outflow side weld (second weld)
21a Outflow side inclined surface portion (second inclined surface portion)
26 inner annular wall portion 27 outer annular wall portion 28 inflow side welded portion (first welded portion)
28a Inflow side inclined surface portion (first inclined surface portion)
S1 First inner welding burr accommodating portion R1 Second outer welding burr accommodating portion

Claims (4)

第１管状体（１１）の端部と第２管状体（１０）の端部とを溶着してなるケース（３）と、該ケース（３）内に配設されたオイル濾過用のフィルタ（２）とを備えたオイルストレーナ（１）であって、
上記フィルタ（２）は、有底筒状をなし、底壁部と反対側の開口周縁部には径方向外方へ延びるフランジ（２ｂ）が形成され、
上記第１管状体（１１）の端部には、上記第２管状体（１０）へ向けて突出し円環状に延びる第１溶着部（２８）が形成され、
上記第２管状体（１０）の端部には、上記第１管状体（１１）へ向けて突出し上記第１溶着部（２８）に沿うように円環状に延びる第２溶着部（２１）と、該第２溶着部（２１）の内側において上記フィルタ（２）のフランジ（２ｂ）が嵌る段差部（２２）とが形成され、
上記第１溶着部（２８）の突出方向先端側には、径方向内方へ行くほど上記第２管状体（１０）側に位置するように該第１溶着部（２８）の中心線に対し傾斜した第１傾斜面部（２８ａ）が中心線周りに環状に形成され、
上記第２溶着部（２１）の突出方向先端側には、上記第１傾斜面部（２８ａ）に沿うように、該第２溶着部（２１）の径方向外方に行くほど第１管状体（１１）側に位置するように延びる第２傾斜面部（２１ａ）が中心線周りに環状に形成され、
上記第１傾斜面部（２８ａ）の径方向内縁部は、上記第２傾斜面部（２１ａ）の径方向内縁部よりも内方まで延びており、
上記第１傾斜面部（２８ａ）における径方向内縁部が上記フィルタ（２）のフランジ（２ｂ）に接触して該フランジ（２ｂ）が上記段差部（２２）に押さえ付けられて該フィルタ（２）が保持され、該第１傾斜面部（２８ａ）の内縁部と上記フランジ（２ｂ）との間に内側溶着バリ収容部が構成され、
上記第１傾斜面部（２８ａ）が上記第２溶着部（２１）に対しスピン溶着法により溶着されて上記第１管状体（１１）と上記第２管状体（１０）とが一体化されていることを特徴とするオイルストレーナ（１）。 A case (3) formed by welding the end of the first tubular body (11) and the end of the second tubular body (10) , and an oil filtration filter (in the case (3)) ( 2) an oil strainer (1) comprising :
The filter (2) has a bottomed cylindrical shape, and a flange (2b) extending radially outward is formed on the opening peripheral edge on the opposite side of the bottom wall.
A first welded portion (28) extending toward the second tubular body (10) and extending in an annular shape is formed at the end of the first tubular body (11) ,
A second welded portion (21) projecting toward the first tubular body (11) and extending in an annular shape along the first welded portion (28) at the end of the second tubular body (10). A stepped portion (22) into which the flange (2b) of the filter (2) is fitted inside the second welded portion (21) ,
Above the protruding forward end side of the first weld portion (28), said first welded portion so as to be located about the second tubular body (10) side toward the radially inward center line (28) to The inclined first inclined surface portion (28a) is formed in an annular shape around the center line,
On the distal end side in the protruding direction of the second welded portion (21), the first tubular body (approaching radially outward of the second welded portion (21) along the first inclined surface portion (28a) ( 11) The second inclined surface portion (21a) extending so as to be located on the side is formed in an annular shape around the center line,
The radially inner edge portion of the first inclined surface portion (28a) extends inward from the radially inner edge portion of the second inclined surface portion (21a),
The radially inner edge of the first inclined surface portion (28a) comes into contact with the flange (2b) of the filter (2), and the flange (2b) is pressed against the stepped portion (22), thereby the filter (2). And an inner weld burr accommodating portion is configured between the inner edge portion of the first inclined surface portion (28a) and the flange (2b) ,
The first inclined surface portion (28a) is welded to the second welded portion (21) by a spin welding method, and the first tubular body (11) and the second tubular body (10) are integrated. Oil strainer (1) characterized by the above. 請求項１に記載のオイルストレーナ（１）において、
第２溶着部（２１）の突出方向先端面における径方向外縁部は、第１溶着部（２８）の突出方向先端面における径方向外縁部よりも外方まで延びており、上記第２溶着部（２１）の先端面における外縁部と第１管状体（１１）との間に外側溶着バリ収容部（Ｒ１）が構成されていることを特徴とするオイルストレーナ（１）。 In the oil strainer (1) according to claim 1 ,
A radially outer edge portion of the second welding portion (21) in the protruding front end surface extends outward from a radially outer edge portion of the first welding portion (28) in the protruding front end surface, and the second welding portion. An oil strainer (1) , characterized in that an outer weld burr accommodating portion (R1) is formed between the outer edge portion of the tip surface of (21) and the first tubular body (11 ) . 請求項１または２に記載のオイルストレーナ（１）において、
第１管状体（１１）の端部には、第１溶着部（２８）よりも内側及び外側に、それぞれ、第２管状体（１０）へ向けて突出する内側環状壁部（２６）及び外側環状壁部（２７）が設けられていることを特徴とするオイルストレーナ（１）。 In the oil strainer (1) according to claim 1 or 2 ,
At the end of the first tubular body (11) , an inner annular wall (26) and an outer side project toward the second tubular body (10) , respectively, on the inner side and the outer side than the first welded portion (28). An oil strainer (1) characterized in that an annular wall (27) is provided. 第１管状体（１１）の端部と第２管状体（１０）の端部とを溶着してなるケース（３）と、該ケース（３）内に配設されたオイル濾過用のフィルタ（２）とを備えたオイルストレーナ（１）の製造方法であって、
上記フィルタ（２）は、有底筒状をなし、底壁部と反対側の開口周縁部には径方向外方へ延びるフランジ（２ｂ）が形成されており、
上記第１管状体（１１）の端部に、上記第２管状体（１０）へ向けて突出し円環状に延びる第１溶着部（２８）を形成し、該第１溶着部（２８）の突出方向先端側に、径方向内方へ行くほど上記第２管状体（１０）側に位置するように該第１溶着部（２８）の中心線に対し傾斜した第１傾斜面部（２８ａ）を中心線周りに環状に形成する第１溶着部形成工程と、
上記第２管状体（１０）の端部に、上記第１管状体（１１）へ向けて突出し上記第１溶着部（２８）に沿うように円環状に延びる第２溶着部（２１）と、該第２溶着部（２１）の内側において上記フィルタ（２）のフランジ（２ｂ）が嵌る段差部（２２）とを形成するとともに、上記第２溶着部（２１）の突出方向先端側には、上記第１傾斜面部（２８ａ）に沿うように、該第２溶着部（２１）の径方向外方に行くほど第１管状体（１１）側に位置するように延びる第２傾斜面部（２１ａ）を中心線周りに環状に形成する第２溶着部形成工程と、
上記第１溶着部形成工程と上記第２溶着部形成工程の後、上記フィルタ（２）のフランジ（２ｂ）を上記第２管状体（１０）の段差部（２２）に嵌め、上記第１傾斜面部（２８ａ）を上記第２溶着部（２１）に対しスピン溶着法により溶着し、上記第１管状体（１１）と上記第２管状体（１０）とを一体化する溶着工程とを備え、
上記溶着工程では、上記第１傾斜面部（２８ａ）の径方向内縁部は、上記第２傾斜面部（２１ａ）の径方向内縁部よりも内方まで延びており、上記第１傾斜面部（２８ａ）における径方向内縁部を上記フランジ（２ｂ）に接触させて該フランジ（２ｂ）を上記段差部（２２）に押さえ付けて該フィルタ（２）を保持するとともに、上記第１傾斜面部（２８ａ）の内縁部と上記フランジ（２ｂ）との間に内側溶着バリ収容部を構成することを特徴とするオイルストレーナ（１）の製造方法。 A case (3) formed by welding the end of the first tubular body (11) and the end of the second tubular body (10) , and an oil filtration filter (in the case (3)) ( 2) a method for producing an oil strainer (1) comprising :
The filter (2) has a bottomed cylindrical shape, and a flange (2b) extending radially outward is formed on the opening peripheral edge on the opposite side to the bottom wall,
A first welded portion (28) projecting toward the second tubular body (10) and extending in an annular shape is formed at an end of the first tubular body (11) , and the first welded portion (28) projects. The first inclined surface portion (28a) that is inclined with respect to the center line of the first welded portion (28) so as to be located on the second tubular body (10) side as it goes radially inward toward the distal end in the direction . A first weld forming step for forming a ring around the line;
A second welded portion (21) projecting toward the first tubular body (11) at the end of the second tubular body (10) and extending in an annular shape along the first welded portion (28) ; A stepped portion (22) into which the flange (2b) of the filter (2) is fitted inside the second welded portion (21), and at the front end side in the protruding direction of the second welded portion (21), A second inclined surface portion (21a) extending so as to be positioned closer to the first tubular body (11) as it goes radially outward of the second welded portion (21) along the first inclined surface portion (28a). A second welded portion forming step for forming a ring around the center line ;
After the first welded portion forming step and the second welded portion forming step, the flange (2b) of the filter (2) is fitted to the stepped portion (22) of the second tubular body (10), and the first slope is formed. A welding step in which the surface portion (28a) is welded to the second welding portion (21) by a spin welding method, and the first tubular body (11) and the second tubular body (10) are integrated ;
In the welding step, the radially inner edge portion of the first inclined surface portion (28a) extends inward from the radially inner edge portion of the second inclined surface portion (21a), and the first inclined surface portion (28a). The flange (2b) is brought into contact with the radially inner edge of the flange and the flange (2b) is pressed against the stepped portion (22) to hold the filter (2) and the first inclined surface portion (28a). A method of manufacturing an oil strainer (1) , wherein an inner weld burr accommodating portion is formed between an inner edge portion and the flange (2b) .
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