JP3819642B2 - Joint structure of first and second members having different constituent materials - Google Patents

Joint structure of first and second members having different constituent materials Download PDF

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Publication number
JP3819642B2
JP3819642B2 JP27067099A JP27067099A JP3819642B2 JP 3819642 B2 JP3819642 B2 JP 3819642B2 JP 27067099 A JP27067099 A JP 27067099A JP 27067099 A JP27067099 A JP 27067099A JP 3819642 B2 JP3819642 B2 JP 3819642B2
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Japan
Prior art keywords
synthetic resin
welded
joined
hole
molded body
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JP27067099A
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JP2001088221A (en
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俊郎 川東
義雄 今井
直貴 久保井
健次郎 狩野
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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
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • 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
    • B29C66/304—Joining through openings in an intermediate part of the article
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the 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
    • B29C66/50—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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • 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
    • B29C66/61—Joining from or joining on the inside
    • 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
    • B29C66/712—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 the composition of one of the parts to be joined being different from the composition of the other part
    • 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
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/60—Riveting or staking
    • B29C65/601—Riveting or staking using extra riveting elements, i.e. the rivets being non-integral with 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
    • 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
    • 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
    • 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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • 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
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3008—Instrument panels

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

Description

【０００１】
【発明の属する技術分野】
本発明は構成材料を異にする第１、第２の部材、特に、合成樹脂よりなる第１の部材と、その第１の部材とは構成材料を異にする第２の部材との接合構造に関する。
【０００２】
【従来の技術】
従来、合成樹脂よりなる第１、第２の部材の溶着による接合構造においては、両部材の溶着強度を高めるべく、それらを同一の合成樹脂より構成している。またインジェクション成形による第１の部材に、ブロー成形による第２の部材を接合した接合構造において、第１の部材を構成する合成樹脂とブロー成形に適した合成樹脂との溶着強度が低い場合には第２の部材の接合にボルト止め手段が適用され、これは、合成樹脂よりなる第１の部材と金属よりなる第２の部材との接合構造においても同様である。
【０００３】
【発明が解決しようとする課題】
しかしながら従来の溶着による接合構造においては、合成樹脂よりなる第１、第２の部材のうちの一方の材料が安価なもので十分な場合にも、その材料を他方の高価な材料に合せなければならず、接合体のコストダウンの要請に応ずることができない、という問題があった。またボルト止め手段は、その締付け箇所が多い場合には作業能率が悪く、接合体の高コスト化は免れない。
【０００４】
【課題を解決するための手段】
本発明は、合成樹脂よりなる第１の部材と、その第１の部材とは構成材料を異にする第２の部材との接合を溶着法の適用下で実現し、これにより接合体のコストダウンの要請に容易に応ずることができるようにした前記接合構造を提供することを目的とする。
【０００５】
前記目的を達成するために、請求項１の発明は、合成樹脂よりなる第１の部材と、前記合成樹脂に対して溶着強度が低い合成樹脂よりなる第２の部材との接合構造であって、前記第１および第２の部材の各々の被接合部相互が重ね合されると共に、その一方の被接合部に通し孔が存し、またその他方の被接合部を構成する合成樹脂に対して相溶性を持つ合成樹脂製止め具の被溶着部が前記通し孔に挿入されて前記他方の被接合部に溶着され、前記被溶着部と一体の押圧部が前記一方の被接合部に密着するように、該一方の被接合部と該押圧部との間の隙間を埋める手段を備えていることを特徴とする。
【０００６】
前記のように構成すると、相互に溶着強度の低い合成樹脂よりなる第１、第２の部材の強固な接合が溶着法の適用下で実現される。その上、前記通し孔を有する前記一方の被接合部と前記押圧部との間の隙間を埋める手段を備えるので、前記隙間に起因した前記一方の被接合部の振動による騒音の発生を確実に防止することができる。
【０００７】
また前記目的を達成するために、請求項２の発明は、合成樹脂よりなる第１の部材と、前記合成樹脂に対して溶着強度が低い合成樹脂よりなる第２の部材との接合構造であって、前記第１および第２の部材の各々の被接合部相互が重ね合されると共に、その一方の被接合部に通し孔が存し、またその他方の被接合部には前記通し孔に挿入された被溶着凸部が存し、その被溶着凸部を構成する合成樹脂に対して相溶性を持つ合成樹脂製押圧板が該被溶着凸部に溶着され、その押圧板が前記一方の被接合部に密着するように、前記一方の被接合部と前記押圧板との間の隙間を埋める手段を備えていることを特徴とする。
【０００８】
前記のように構成すると、相互に溶着強度の低い合成樹脂よりなる前記第１、第２の部材の強固な接合が溶着法の適用下で実現される。その上、前記通し孔を有する前記一方の被接合部と前記押圧板との間の隙間を埋める手段を備えるので、前記隙間に起因した前記一方の被接合部の振動による騒音の発生を確実に防止することができる。
【０００９】
【発明の実施の形態】
図１〜３に示す接合構造の第１実施例は、熱可塑性合成樹脂、例えばＰＰ（ポリプロピレン）よりなる第１の部材としての板状第１成形体１と、第１成形体１とは構成材料を異にする、つまりＰＰに対して溶着強度が低い熱可塑性合成樹脂、例えばＰＥ（ポリエチレン）よりなる第２の部材としての板状第２成形体２とを２箇所で接合したものである。
【００１０】
第１および第２成形体１，２の相互に重ね合された両被接合部３，４の一方、この実施例では第２成形体２の被接合部４に長方形の通し孔５が存する。また第１成形体１を構成するＰＰに対して相溶性を持つ熱可塑性合成樹脂、つまりＰＰよりなる止め具６は断面Ｔ字形をなし、その鉛直な１つの角棒形被溶着部７が通し孔５に挿入されて第１成形体１の被接合部３に、例えば振動溶着法の適用下で溶着され、その被溶着部７と一体の水平な板状押圧部８が、第２成形体２の被接合部４を第１成形体１の被接合部３に押圧すべく、第２成形体２の被接合部４における通し孔５の開口周辺部９に密着する。
【００１１】
前記のように構成すると、構成材料を異にする、この例では相互に溶着強度の低い合成樹脂よりなる第１、第２成形体１，２の強固な接合が溶着法の適用下で容易に実現される。これにより接合体１０のコストダウンの要請に容易に応ずることが可能である。この場合、第２成形体２、つまり第２の部材の構成材料に対する、接合上の制約は皆無である。 止め具６の製造に当っては次のような手段を採用することができる。即ち、図４に示すように第１成形体１を成形する、第１、第２型１１，１２よりなる二つ割成形型１３において、第１成形体成形用キャビティ１４の両側に２つの止め具成形用キャビティ１５（図には一方のみ示す）を設けて、両キャビティ１４，１５間をそれぞれゲート１６を介して連通し、第１成形体１の成形と同時に２つの止め具６を成形するものである。
【００１２】
このような手段を採用すると、止め具専用の成形型およびその成形作業を不要にしてコストの上昇を抑制することができる。
【００１３】
図５に示すように、第２成形体２をシートブロー成形法を適用して成形し、その中空本体１７に連なり、且つ通し孔５を有するピンチオフ部を被接合部４とした場合、その被接合部４に波のようなうねりが生じているため、通し孔５の開口周辺部９における谷となった部分と、それと対向する止め具６の被溶着部７との間に隙間ｇが生じ、その隙間ｇに起因した被接合部４の振動により騒音が発生することがある。
【００１４】
このような不具合の発生を回避すべく、押圧部８および通し孔５の開口周辺部９間には、それらの間の隙間ｇを埋める手段が備えられている。この実施例では、押圧部８の、開口周辺部９の谷となった部分との対向面に、被溶着部７を挟むように一対の突出部１８が設けられ、これらの突出部１８は、被溶着部７への振動溶着法の適用下において摩擦熱により軟化して、図６に示すように開口周辺部９の谷となった部分に密着し、これにより前記隙間ｇが埋められる。この場合、被接合部４のうねりは、各成形毎に略一定しているので、それに応じて突出部１８の位置（１または２以上の）および高さｈが決められる。
【００１５】
また止め具６をリベット状に形成すると共に回転溶着法を適用する場合、前記隙間ｇを埋めるべく、押え部８および開口周辺部９間に弾性体、例えばばね部材を介在させることもある。
【００１６】
図７，８に示す接合構造の第２実施例は、前記第１実施例同様に、熱可塑性合成樹脂、例えばＰＰよりなる板状第１成形体１と、ＰＰに対して溶着強度が低い熱可塑性合成樹脂、例えばＰＥよりなる板状第２成形体２とを２箇所で接合したものである。
【００１７】
第１および第２成形体１，２の相互に重ね合された両被接合部３，４の一方、この実施例では第２成形体２の被接合部４に長方形の通し孔５が存し、また第１成形体１の被接合部３に通し孔５に挿入された１つの角棒状被溶着凸部１９が存する。さらに、その被溶着凸部１９を構成するＰＰに対して相溶性を持つ熱可塑性合成樹脂、つまりＰＰよりなる押圧板２０が、例えば振動溶着法の適用下で被溶着凸部１９に溶着されて、第２成形体２の被接合部４を第１成形体１の被接合部３に押圧すべく、第２成形体２の被接合部４における通し孔５の開口周辺部９に密着する。
【００１８】
押圧板２０の製造に当っては次のような手段を採用することができる。即ち、図９に示すように第１成形体１を成形する、第１、第２型１１１，１２１よりなる二つ割成形型１３１において、第１成形体成形用キャビティ１４１の両側に２つの押圧板成形用キャビティ１５１（図には一方のみ示す）を設けて、両キャビティ１４１，１５１間をそれぞれゲート１６１を介して連通し、第１成形体１の成形と同時に２つの押圧板２０を成形するものである。
【００１９】
図１０に示すごとく、前記同様に、第２成形体２をシートブロー成形法を適用して成形し、その中空本体１７に連なり、且つ通し孔５を有するピンチオフ部を被接合部４とした場合、被接合部４に波のようなうねりが生じているため、通し孔５の開口周辺部９における谷となった部分と、それと対向する押圧板２０との間に隙間ｇが生じる。このような状況に対応すべく、押圧板２０および通し孔５の開口周辺部９間には、それらの間の隙間ｇを埋める手段が備えられている。この実施例では、押圧板２０の、開口周辺部９の谷となった部分との対向面に、被溶着凸部１９を挟むように一対の突出部１８が設けられ、これらの突出部１８は、押圧板２０への振動溶着法の適用下において摩擦熱により軟化して、図１１に示すように開口周辺部９に密着し、これにより前記隙間ｇが埋められる。
【００２０】
図１２は、自動車のインストルメントパネル（第１の部材）２１と、空調用ダクト（第２の部材）２２および金属製ブラケット（第２の部材）との接合に、前記第１実施例の技術を適用した場合、ならびにその他の実施例を示す。インストルメントパネル２１はＰＰよりなり、インジェクション成形法によって成形されたものである。一方、ダクト２２はＰＥよりなり、シートブロー成形法によって成形されたものである。止め具６はＰＰよりなり、インストルメントパネル２１と同時に成形されたものである。金属製ブラケット２３は２つの被接合部４を有し、それらには通し孔５が形成されている。図１２において、図１〜３に示した第１実施例と同様の構成要素には第１実施例と同様の符号を付して詳細な説明は省略する。この例に、前記第２実施例の技術を適用し得ることは勿論である。
【００２１】
図１２に示すその他の実施例において、ＰＰよりなる止め具６１の少なくとも１つ、実施例では２つの被溶着部７１がインストルメントパネル２１に溶着されてリレー（第２の部材）２４を挟み、またそれら被溶着部７１と一体の押圧部８１がリレー２４をインストルメントパネル２１に押圧すべく、そのリレー２１に密着している。
【００２２】
図１３に示すその他の実施例において、ＰＰよりなるインストルメントパネル２１に少なくとも１つ、実施例ではリレー２４を挟むように２つの被溶着凸部１９１が存し、ＰＰ製押圧板２０１が両被溶着凸部１９１に溶着されて、前記リレー２４をインストルメントパネル２１に押圧すべく、そのリレー２４に密着している。
【００２３】
【発明の効果】
本発明によれば、前記のように構成することによって、合成樹脂よりなる第１の部材と、その第１の部材とは構成材料を異にする第２の部材との接合を溶着法の適用下で実現し、これにより接合体のコストダウンの要請に容易に応ずることが可能な接合構造を提供することができる。また通し孔を有する一方の被接合部と、合成樹脂製止め具の押圧部（請求項２では合成樹脂製押圧板）との間の隙間を埋める手段を備えるので、前記隙間に起因した前記一方の被接合部の振動による騒音の発生を確実に防止することができる。
【図面の簡単な説明】
【図１】 第１実施例の斜視図である。
【図２】 図１の２−２線断面図である。
【図３】 第１実施例の分解斜視図である。
【図４】 成形型の要部断面図である。
【図５】 第１実施例の変形例における溶着前の要部拡大断面図である。
【図６】 第１実施例の変形例における溶着後の要部拡大断面図である。
【図７】 第２実施例の要部断面図で、図２に対応する。
【図８】 第２実施例の分解斜視図である。
【図９】 成形型の要部断面図である。
【図１０】 第２実施例の変形例における溶着前の要部拡大断面図である。
【図１１】 第２実施例の変形例における溶着後の要部拡大断面図である。
【図１２】 インストルメントパネルと空調用ダクト等との接合構造の要部断面図である。
【図１３】 インストルメントパネルとリレーとの接合構造の要部断面図である。
【符号の説明】
１…………………第１成形体（第１の部材）
２…………………第２成形体（第２の部材）
３…………………他方の被接合部
４…………………一方の被接合部
５…………………通し孔
６，６１…………止め具
７，７１…………被溶着部
８，８１…………押圧部
９…………………開口周辺部
１８………………突出部（手段）
１９，１９１……被溶着凸部
２０，２０１……押圧板
２１………………インストルメントパネル（第１の部材）
２２………………空調用ダクト（第２の部材）
２３………………金属製ブラケット（第２の部材）
２４………………リレー（第２の部材）
ｇ…………………隙間[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a first and second member having different constituent materials, in particular, a first member made of synthetic resin and a joining structure of a second member having a different constituent material from the first member. About.
[0002]
[Prior art]
Conventionally, in the joining structure by welding of the first and second members made of synthetic resin, they are made of the same synthetic resin in order to increase the welding strength of both members. Also, in the joint structure in which the second member by blow molding is joined to the first member by injection molding, when the welding strength between the synthetic resin constituting the first member and the synthetic resin suitable for blow molding is low The bolting means is applied to the joining of the second member, and this is the same in the joining structure of the first member made of synthetic resin and the second member made of metal.
[0003]
[Problems to be solved by the invention]
However, in the conventional joining structure by welding, even if one of the first and second members made of synthetic resin is inexpensive and sufficient, the material must be matched with the other expensive material. In other words, there was a problem that it was not possible to meet the demand for cost reduction of the joined body. In addition, the bolting means has poor work efficiency when the number of tightening points is large, and the cost of the joined body cannot be avoided.
[0004]
[Means for Solving the Problems]
The present invention realizes joining of a first member made of a synthetic resin and a second member having a different constituent material from that of the first member under the application of a welding method, thereby reducing the cost of the joined body. It is an object of the present invention to provide a joining structure that can easily respond to a down request.
[0005]
In order to achieve the object, the invention of claim 1 is a joining structure of a first member made of a synthetic resin and a second member made of a synthetic resin having a low welding strength with respect to the synthetic resin. The first and second members to be joined are overlapped with each other , a through hole exists in one of the joined parts, and the synthetic resin constituting the other joined part the welded portion of the synthetic resin stopper having a compatibility Te is welded to the joined portion of the other are inserted into the through-hole, the adhesion the the bonding portion pressing portion of the one integral with the welded portion As described above, a means for filling a gap between the one bonded portion and the pressing portion is provided .
[0006]
If comprised as mentioned above, the firm joining of the 1st, 2nd member which consists of a synthetic resin with low mutual welding strength will be implement | achieved under the application of the welding method . In addition, since a means for filling the gap between the one bonded portion having the through hole and the pressing portion is provided, it is possible to reliably generate noise due to the vibration of the one bonded portion caused by the gap. Can be prevented.
[0007]
In order to achieve the above object, the invention of claim 2 is a joining structure of a first member made of a synthetic resin and a second member made of a synthetic resin having a low welding strength with respect to the synthetic resin. The first and second members to be joined are overlapped with each other, and a through hole exists in one of the joined parts, and the other joined part has the through hole. inserted be welded projections resides, the synthetic resin pressing plate having a compatibility with the synthetic resin constituting the object to be welded convex portion is welded to said object to be welded protrusion, the pressing plate is one of the Means is provided for filling a gap between the one bonded portion and the pressing plate so as to be in close contact with the bonded portion .
[0008]
If comprised as mentioned above, the firm joining of the said 1st, 2nd member consisting of a synthetic resin with low welding strength mutually is implement | achieved under the application of a welding method . In addition, since a means for filling a gap between the one bonded portion having the through hole and the pressing plate is provided, it is possible to reliably generate noise due to vibration of the one bonded portion caused by the gap. Can be prevented.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The first embodiment of the joining structure shown in FIGS. 1 to 3 includes a plate-like first molded body 1 as a first member made of a thermoplastic synthetic resin, such as PP (polypropylene), and the first molded body 1. A material is different, that is, a thermoplastic synthetic resin having a low welding strength with respect to PP, for example, a plate-like second molded body 2 as a second member made of PE (polyethylene) is joined at two locations. .
[0010]
In this embodiment, a rectangular through-hole 5 exists in the bonded portion 4 of the second molded body 2 in one of the bonded portions 3 and 4 of the first and second molded bodies 1 and 2 superimposed on each other. Further, a stopper 6 made of a thermoplastic synthetic resin having compatibility with PP constituting the first molded body 1, that is, PP, has a T-shaped cross section, and a single rectangular bar-shaped welded portion 7 passes therethrough. A horizontal plate-like pressing portion 8 that is inserted into the hole 5 and is welded to the bonded portion 3 of the first molded body 1 under application of, for example, the vibration welding method, and is integrated with the welded portion 7 is a second molded body. In order to press the two to-be-joined parts 4 against the to-be-joined part 3 of the first molded body 1, the two to-be-joined parts 4 are brought into close contact with the opening peripheral part 9 of the through hole 5 in the to-be-joined part 4 of the second molded body 2.
[0011]
When configured as described above, the constituent materials are different. In this example, the first and second molded bodies 1 and 2 made of a synthetic resin having a low welding strength can be easily joined together by applying the welding method. Realized. Thereby, it is possible to easily meet the demand for cost reduction of the bonded body 10. In this case, there are no restrictions on joining to the constituent material of the second molded body 2, that is, the second member. In manufacturing the stopper 6, the following means can be employed. That is, as shown in FIG. 4, in the split mold 13 comprising the first and second molds 11 and 12 for molding the first molded body 1, two stoppers are provided on both sides of the first molded body molding cavity 14. A tool forming cavity 15 (only one is shown in the figure) is provided, the cavities 14 and 15 are communicated with each other via a gate 16, and two stoppers 6 are formed simultaneously with the molding of the first molded body 1. Is.
[0012]
By adopting such means, it is possible to suppress an increase in cost by eliminating the need for a mold dedicated to the stopper and the molding operation thereof.
[0013]
As shown in FIG. 5, when the second molded body 2 is molded by applying a sheet blow molding method, and the pinch-off portion connected to the hollow main body 17 and having the through hole 5 is the bonded portion 4, Since a wave-like undulation is generated in the joint 4, a gap g is generated between a portion that becomes a valley in the opening peripheral portion 9 of the through-hole 5 and a welded portion 7 of the stopper 6 that faces it. In addition, noise may be generated due to vibration of the bonded portion 4 due to the gap g.
[0014]
In order to avoid the occurrence of such a problem, a means for filling a gap g between the pressing portion 8 and the opening peripheral portion 9 of the through hole 5 is provided. In this embodiment, a pair of projecting portions 18 are provided on the surface of the pressing portion 8 facing the portion that becomes the valley of the opening peripheral portion 9 so as to sandwich the welded portion 7. Under the application of the vibration welding method to the welded portion 7, it is softened by frictional heat and is brought into close contact with the valley portion of the opening peripheral portion 9 as shown in FIG. 6, thereby filling the gap g. In this case, since the undulation of the bonded portion 4 is substantially constant for each molding, the position (one or more) and the height h of the protruding portion 18 are determined accordingly.
[0015]
When the stopper 6 is formed in a rivet shape and the rotary welding method is applied, an elastic body such as a spring member may be interposed between the presser portion 8 and the opening peripheral portion 9 in order to fill the gap g.
[0016]
The second embodiment of the joint structure shown in FIGS. 7 and 8 is similar to the first embodiment in the plate-like first molded body 1 made of a thermoplastic synthetic resin, for example, PP, and heat having low welding strength with respect to PP. A plastic synthetic resin, for example, a plate-like second molded body 2 made of PE is joined at two locations.
[0017]
In this embodiment, a rectangular through-hole 5 exists in the bonded portion 4 of the second molded body 2, which is one of the bonded portions 3 and 4 of the first and second molded bodies 1 and 2 that are overlapped with each other. In addition, there is one square bar-shaped welding convex portion 19 inserted into the through hole 5 in the bonded portion 3 of the first molded body 1. Further, a thermoplastic synthetic resin having compatibility with PP constituting the weld convex portion 19, that is, a pressing plate 20 made of PP is welded to the weld convex portion 19 under application of, for example, a vibration welding method. In order to press the bonded portion 4 of the second molded body 2 against the bonded portion 3 of the first molded body 1, the second molded body 2 is in close contact with the opening peripheral portion 9 of the through hole 5 in the bonded portion 4 of the second molded body 2.
[0018]
In manufacturing the pressing plate 20, the following means can be employed. That is, as shown in FIG. 9, in the split mold 131 composed of the first and second molds 111 and 121 for molding the first molded body 1, two presses are provided on both sides of the first molded body molding cavity 141. A plate forming cavity 151 (only one is shown in the figure) is provided, and the two cavities 141 and 151 are communicated with each other via a gate 161, and the two pressing plates 20 are formed simultaneously with the formation of the first molded body 1. Is.
[0019]
As shown in FIG. 10, similarly to the above, when the second molded body 2 is molded by applying a sheet blow molding method, and the pinch-off part connected to the hollow main body 17 and having the through hole 5 is used as the joined part 4. Since a wave-like undulation is generated in the bonded portion 4, a gap g is generated between the portion of the through-hole 5 that forms a valley in the opening peripheral portion 9 and the pressing plate 20 facing the portion. In order to cope with such a situation, a means for filling a gap g between the pressing plate 20 and the opening peripheral portion 9 of the through hole 5 is provided. In this embodiment, a pair of projecting portions 18 are provided on the surface of the pressing plate 20 facing the portion that becomes the valley of the opening peripheral portion 9 so as to sandwich the welded convex portion 19, and these projecting portions 18 are Under the application of the vibration welding method to the pressing plate 20, it softens due to frictional heat and adheres closely to the peripheral portion 9 of the opening as shown in FIG. 11, thereby filling the gap g.
[0020]
FIG. 12 shows the technique of the first embodiment for joining an automobile instrument panel (first member) 21 to an air conditioning duct (second member) 22 and a metal bracket (second member). As well as other examples. The instrument panel 21 is made of PP and is molded by an injection molding method. On the other hand, the duct 22 is made of PE and is formed by a sheet blow molding method. The stopper 6 is made of PP and is molded simultaneously with the instrument panel 21. The metal bracket 23 has two joined parts 4, and a through hole 5 is formed in them. In FIG. 12, the same components as those of the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals as those of the first embodiment, and detailed description thereof is omitted. Of course, the technique of the second embodiment can be applied to this example.
[0021]
In another embodiment shown in FIG. 12, at least one stopper 61 made of PP, in the embodiment, two welded portions 71 are welded to the instrument panel 21 to sandwich the relay (second member) 24, Further, a pressing portion 81 integrated with the welded portion 71 is in close contact with the relay 21 so as to press the relay 24 against the instrument panel 21.
[0022]
In the other embodiment shown in FIG. 13, there are at least one welded projection 191 on the instrument panel 21 made of PP, and in the embodiment two sandwiched projections 191 so as to sandwich the relay 24, and the PP pressing plate 201 has both covers. In order to press the relay 24 against the instrument panel 21 by being welded to the welding convex portion 191, the relay 24 is in close contact with the relay 24.
[0023]
【The invention's effect】
According to the present invention, by adopting the welding method, the first member made of synthetic resin and the second member having a different constituent material from that of the first member are configured as described above. It is possible to provide a joint structure that can be realized below and can easily meet the demand for cost reduction of the joined body. In addition, since there is provided a means for filling a gap between one joined portion having the through hole and the pressing portion of the synthetic resin stopper (the synthetic resin pressing plate in claim 2), the one caused by the gap It is possible to reliably prevent the generation of noise due to the vibration of the bonded portion.
[Brief description of the drawings]
FIG. 1 is a perspective view of a first embodiment.
2 is a cross-sectional view taken along line 2-2 of FIG.
FIG. 3 is an exploded perspective view of the first embodiment.
FIG. 4 is a cross-sectional view of a main part of a mold.
FIG. 5 is an enlarged cross-sectional view of a main part before welding in a modification of the first embodiment.
FIG. 6 is an enlarged cross-sectional view of the main part after welding in a modification of the first embodiment.
FIG. 7 is a cross-sectional view of an essential part of the second embodiment and corresponds to FIG.
FIG. 8 is an exploded perspective view of a second embodiment.
FIG. 9 is a cross-sectional view of a main part of a mold.
FIG. 10 is an enlarged cross-sectional view of a main part before welding in a modification of the second embodiment.
FIG. 11 is an enlarged cross-sectional view of a main part after welding in a modification of the second embodiment.
FIG. 12 is a cross-sectional view of a main part of a joint structure between an instrument panel and an air conditioning duct and the like.
FIG. 13 is a cross-sectional view of a main part of a joint structure between an instrument panel and a relay.
[Explanation of symbols]
1 …………………… The first molded body (first member)
2 ………………… Second molded body (second member)
3 ................ The other welded part 4 ................ One welded part 5 ........... Through-holes 6, 61 ........ Stoppers 7, 71 ........ …… Welding part 8, 81 ………… Pressing part 9 ……………… Opening peripheral part 18 ……………… Protruding part (means)
19, 191... Welded projections 20 and 201... Press plate 21... ... instrument panel (first member)
22 ……………… Air-conditioning duct (second member)
23 ……………… Metal bracket (second member)
24 ……………… Relay (second member)
g ………………… Gap

Claims (2)

合成樹脂よりなる第１の部材（１，２１）と、前記合成樹脂に対して溶着強度が低い合成樹脂よりなる第２の部材（２，２２）との接合構造であって、
前記第１および第２の部材（１，２１；２，２２）の各々の被接合部（３，４）相互が重ね合されると共に、その一方の被接合部（４）に通し孔（５）が存し、またその他方の被接合部（３）を構成する合成樹脂に対して相溶性を持つ合成樹脂製止め具（６）の被溶着部（７）が前記通し孔（５）に挿入されて前記他方の被接合部（３）に溶着され、前記被溶着部（７）と一体の押圧部（８）が前記一方の被接合部（４）に密着するように、該一方の被接合部（４）と該押圧部（８）との間の隙間（ｇ）を埋める手段（１８）を備えていることを特徴とする、構成材料を異にする第１、第２の部材の接合構造。A joining structure of a first member (1, 21) made of a synthetic resin and a second member (2, 22) made of a synthetic resin having a low welding strength with respect to the synthetic resin,
The joined portions (3, 4) of the first and second members (1, 21; 2, 22) are overlapped with each other, and a through hole (5) is formed in one of the joined portions (4). ) And the welded portion (7) of the synthetic resin stopper (6) having compatibility with the synthetic resin constituting the other bonded portion (3) is formed in the through hole (5). Inserted and welded to the other welded part (3), and the pressing part (8) integrated with the welded part (7) is in close contact with the one joined part (4). First and second members having different constituent materials, comprising means (18) for filling the gap (g) between the bonded portion ( 4 ) and the pressing portion (8) Bonding structure. 合成樹脂よりなる第１の部材（１，２１）と、前記合成樹脂に対して溶着強度が低い合成樹脂よりなる第２の部材（２，２２）との接合構造であって、
前記第１および第２の部材（１，２１；２，２２）の各々の被接合部（３，４）相互が重ね合されると共に、その一方の被接合部（４）に通し孔（５）が存し、またその他方の被接合部（３）には前記通し孔（５）に挿入された被溶着凸部（１９）が存し、その被溶着凸部（１９）を構成する合成樹脂に対して相溶性を持つ合成樹脂製押圧板（２０）が該被溶着凸部（１９）に溶着され、その押圧板（２０）が前記一方の被接合部（４）に密着するように、前記一方の被接合部（４）と前記押圧板（２０）との間の隙間（ｇ）を埋める手段（１８）を備えていることを特徴とする、構成材料を異にする第１、第２の部材の接合構造。A joining structure of a first member (1, 21) made of a synthetic resin and a second member (2, 22) made of a synthetic resin having a low welding strength with respect to the synthetic resin,
The joined portions (3, 4) of the first and second members (1, 21; 2, 22) are overlapped with each other, and a through hole (5) is formed in one of the joined portions (4). ), And the other welded portion (3) has a welded convex portion (19) inserted into the through-hole (5), and the composite constituting the welded convex portion (19). A synthetic resin pressing plate (20) having compatibility with the resin is welded to the welding projection (19), and the pressing plate (20) is in close contact with the one bonded portion (4). First, different constituent materials, comprising means (18) for filling the gap (g) between the one joined part ( 4 ) and the pressing plate (20), The joining structure of the 2nd member.
JP27067099A 1999-09-24 1999-09-24 Joint structure of first and second members having different constituent materials Expired - Fee Related JP3819642B2 (en)

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