JP4751685B2 - Method for assembling vehicle interior parts with airbag doors - Google Patents

Method for assembling vehicle interior parts with airbag doors Download PDF

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Publication number
JP4751685B2
JP4751685B2 JP2005282660A JP2005282660A JP4751685B2 JP 4751685 B2 JP4751685 B2 JP 4751685B2 JP 2005282660 A JP2005282660 A JP 2005282660A JP 2005282660 A JP2005282660 A JP 2005282660A JP 4751685 B2 JP4751685 B2 JP 4751685B2
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back surface
interior
airbag
vibration
protrusions
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JP2007091024A (en
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雅之 内田
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Daikyo Nishikawa Corp
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Daikyo Nishikawa 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
    • B29C66/11—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
    • B29C66/11—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
    • B29C66/114—Single butt 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
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—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
    • 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
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3038—Air bag covers

Landscapes

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

Description

この発明は、エアバッグ装置の作動により展開するエアバッグドア部が設けられたインストルメントパネル等の車両用内装品の組立て方法に関するものである。 The present invention relates to a method for assembling interior parts for a vehicle such as an instrument panel provided with an airbag door portion that is deployed by the operation of an airbag device.

従来より、この種の車両用内装品として、例えば特許文献１に記載されているように、エアバッグドア部（扉予定部）が破断予定部（テアライン）で区画された樹脂製の内装品本体（リッド）と、この内装品本体の裏側に上記エアバッグドア部に対応して振動溶着により一体に取り付けられた樹脂製のエアバッグシュート（インナ）と、を備えたインストルメントパネルが知られている。   Conventionally, as this type of vehicle interior product, as described in Patent Document 1, for example, a resin interior product body in which an airbag door portion (predetermined door portion) is partitioned by a planned break portion (tea line) There is known an instrument panel including a lid and a resin air bag chute (inner) integrally attached to the back side of the interior body by vibration welding corresponding to the air bag door portion. Yes.

上記エアバッグシュートは、上記内装品本体におけるエアバッグドア部の裏面とこれを囲む部位（非展開部）とにそれぞれ接合されるフラップ部（扉補強部）及びフランジ部（周縁補強部）を備えていて、そのフラップ部及びフランジ部には、各々振動溶着の振動方向に沿って延びる複数の第１方向突条部（第１リブ）と、これに直交する複数の第２方向突条部（第２リブ）とが格子状に形成されており、これらの突条部を内装品本体の裏面に押し付けて加振することによって、溶着させて固定するようになっている。
特開２００４−１７５３０５号公報 The airbag chute includes a flap portion (door reinforcement portion) and a flange portion (peripheral reinforcement portion) that are respectively joined to the back surface of the airbag door portion in the interior article main body and a portion (non-deployment portion) surrounding the airbag door portion. The flap portion and the flange portion each have a plurality of first direction protrusions (first ribs) extending along the vibration direction of vibration welding, and a plurality of second direction protrusions ( The second ribs) are formed in a lattice shape, and these protrusions are pressed against the back surface of the interior product main body to be vibrated to be welded and fixed.
JP 2004-175305 A

ところで、近年、コストダウンや軽量化などのために内装品本体を薄くすることが求められており、こうすると、上記のようにエアバッグシュートを振動溶着により取り付けたときに、内装品本体に外観不良が発生する虞れがある。すなわち、上記のように振動方向の第１方向突条部とこれに直交する第２方向突条部とをそれぞれ内装品本体の裏面に振動溶着するときには、第１方向突条部に加わる熱量が第２方向突条部に比べて大きくなるので、両者の溶け具合が異なるものとなり、その分、溶着終了時点で両者の高さが異なるものとなって、内装品本体の表面に波打つような模様が浮き出てしまうのである。   By the way, in recent years, it has been required to reduce the thickness of the interior product body for cost reduction and weight reduction. Thus, when the airbag chute is attached by vibration welding as described above, There is a risk that defects will occur. That is, when the first direction protrusion in the vibration direction and the second direction protrusion perpendicular to the vibration direction are welded to the back surface of the interior product main body as described above, the amount of heat applied to the first direction protrusion is Since it is larger than the ridges in the 2nd direction, the melted state of the two will be different, and the height of both will be different at the end of welding, and the pattern will wave on the surface of the interior body Will come out.

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、振動溶着のための突条部の構成に工夫を凝らして、内装品本体を薄くしても外観不良が生じないようにすることにある。   The present invention has been made in view of such a point, and the object of the present invention is to devise the configuration of the protruding portion for vibration welding so that a poor appearance occurs even if the interior body is made thin. There is to be no.

上記の目的を達成するため、本発明では、振動溶着の振動方向に延びる第１方向突条部を第２方向突条部よりも高くして、その第１方向突条部が内装品本体の裏面に溶着により固定された状態で、第２方向突条部が内装品本体の裏面に当接するようにした。   In order to achieve the above object, in the present invention, the first direction ridge extending in the vibration direction of vibration welding is made higher than the second direction ridge, and the first direction ridge is formed on the interior part main body. The second direction protrusion is in contact with the back surface of the interior product main body while being fixed to the back surface by welding.

具体的には、この発明は、エアバッグ装置の作動により展開するエアバッグドア部が破断予定部で区画された内装品本体と、該内装品本体の裏面に上記エアバッグドア部に対応して一体に取り付けられたエアバッグシュートと、を備えたエアバッグドア部付き車両用内装品の組立て方法を対象とし、上記エアバッグシュートが、上記内装品本体の裏面において上記エアバッグドア部を囲む部位に振動溶着されるフランジ部を有し、上記エアバッグ装置が収容される枠体と、上記エアバッグドア部の裏面に振動溶着されるフラップ部と、上記枠体とフラップ部の基端側とを一体に連結するヒンジ部と、を備えており、上記フランジ部及びフラップ部の少なくとも一方には、各々振動溶着の振動方向に延びる複数の第１方向突条部と、各々振動方向に略直交する方向に延び、突端が概略平坦な面に形成された複数の第２方向突条部とが、互いに交差して格子状に形成され、かつ上記第１方向突条部は第２方向突条部よりも高く突設されている場合に、次のような解決手段を講じた。 Specifically, the present invention relates to an interior product main body in which an airbag door portion that is deployed by the operation of an airbag device is partitioned by a portion to be broken, and the back surface of the interior product body corresponds to the airbag door portion. site was an air bag chute mounted together, the method of assembling the air bag door portion with a vehicle interior trim having a target, the air bag chute, surrounding the air bag door portion in the rear surface of the interior trim body A frame body having a flange portion that is vibration welded to the airbag device, a flap portion that is vibration welded to the back surface of the airbag door portion, and a base end side of the frame body and the flap portion. A plurality of first direction protrusions extending in the vibration direction of vibration welding, and at least one of the flange portion and the flap portion, respectively. Extending in a direction substantially orthogonal to the protruding end there is a second direction protrusions of a plurality formed in schematic flat surface, it is formed in a lattice shape to cross each other, and the first direction protrusions and the second The following solution was taken when the ridge was higher than the directional protrusion.

すなわち、請求項１に係る発明では、上記エアバッグシュートを上記内装品本体の裏面に配置した状態で、上記第１方向突条部を上記内装品本体の裏面に押し付けて加振することにより突端を溶融させて内装品本体の裏面に振動溶着して固定する一方、上記第２方向突条部の突端を上記第１方向突条部が振動溶着により溶減することにより内装品本体の裏面に当接させて内装品を組み立てることを特徴とする。   That is, in the invention according to claim 1, in the state where the airbag chute is arranged on the back surface of the interior product main body, the first direction protrusion is pressed against the back surface of the interior product body to vibrate, thereby generating a tip. Is melted and fixed to the back surface of the interior product body by vibration welding, while the projecting end of the second direction protrusion is melted down by vibration welding on the back surface of the interior product body. It is characterized by assembling interior parts by abutting.

また、請求項２の発明では、上記の方法において、上記第１及び第２方向突条部が少なくとも上記フランジ部に形成されている場合に、このフランジ部における各第２方向突条部の長手方向の端部を、それぞれ第１方向突条部よりもフランジ部外周縁側に突出させたことを特徴とする。 According to a second aspect of the present invention, in the above method , when the first and second direction protrusions are formed on at least the flange part, the length of each second direction protrusion in the flange part is Each of the end portions in the direction protrudes toward the outer peripheral edge of the flange portion with respect to the first direction ridge portion.

請求項１、２の発明によると、振動方向の第１方向突条部を第２方向突条部よりも高くし、それらが形成されたフランジ部若しくはフラップ部を内装品本体の裏面に押し付けて加振して、その第１方向突条部が内装品本体の裏面に溶着により固定された状態で、第２方向突条部が内装品本体の裏面に当接するようにしたので、溶着の終了時点では第１及び第２方向突条部の高さが殆ど変わらなくなり、内装品本体を薄くしても、その表面に波打つような模様が浮き出ることはなくなる。よって、外観不良は発生しない。   According to the first and second aspects of the invention, the first direction ridges in the vibration direction are made higher than the second direction ridges, and the flanges or flaps on which they are formed are pressed against the back surface of the interior body. Since the first direction ridge is fixed to the back surface of the interior product main body by welding and the second direction ridge is in contact with the back surface of the interior product body, the welding is completed. At the time, the heights of the first and second ridges hardly change, and even if the interior body is made thinner, a wavy pattern does not appear on the surface. Therefore, no appearance defect occurs.

尚、そのように振動溶着前の第１方向突条部を高くしていても、この第１方向突条部が溶着によりしっかり固定された状態では、第２方向突条部も多少は内装品本体の裏面に溶着することになると考えられる。従って、上記の「第２方向突条部が内装品本体の裏面に当接している」というのは、そのように第２方向突条部の一部が溶着している状態も含めて、要するに、振動溶着後の第１方向突条部の高さが振動溶着前の第２方向突条部の高さと概略、一致していることを意味する。   Even if the first direction ridge before the vibration welding is made high in this way, if the first direction ridge is firmly fixed by welding, the second direction ridge is slightly more interior. It is thought that it will be welded to the back of the body. Therefore, the above-mentioned “the second direction ridge portion is in contact with the back surface of the interior product main body” includes the state in which a part of the second direction ridge portion is welded as such. It means that the height of the first direction ridge after vibration welding is approximately the same as the height of the second direction ridge before vibration welding.

そのようにして内装品本体の裏面に振動溶着されたエアバッグシュートのフランジ部若しくはフラップ部は、内装品本体に対して大きく傾くことがなく、全体が略均一の強度で取り付けられることになるので、エアバッグの作動を安定的に確保することができるとともに、その際にエアバッグドア部が吹き飛ばされて車両の乗員に衝突する心配もなく、安全面でも好ましい。   The flange portion or the flap portion of the airbag chute that is vibration welded to the back surface of the interior product body in this way is not greatly inclined with respect to the interior product body, and the whole is attached with a substantially uniform strength. The operation of the airbag can be ensured stably, and there is no fear that the airbag door portion will be blown off and collide with the vehicle occupant at that time, which is preferable in terms of safety.

特に、請求項２の発明のように第２方向突条部の長手方向の端部を第１方向突条部よりもフランジ部外周縁側に突出させれば、複数の第２方向突条部がそれぞれ内装品本体の裏面に当接していて、浮き上がっていないことを目視にて確認でき、当該フランジ部やフラップ部の取り付け不良を容易に検出することができる。   In particular, if the end portion in the longitudinal direction of the second direction ridge portion is protruded toward the outer peripheral edge of the flange portion from the first direction ridge portion as in the invention of claim 2, a plurality of second direction ridge portions are formed. Each of them is in contact with the back surface of the interior product main body, and it can be visually confirmed that it is not lifted up, and it is possible to easily detect a mounting failure of the flange portion or the flap portion.

以下、この発明の実施の形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の実施形態に係る組立て方法により組み立てられたエアバッグドア付き車両用内装品であるインストルメントパネル１の助手席前方部分を示す。図２は図１のII−II線における断面図である。このインストルメントパネル１は、内装品本体（インストルメントパネル本体）を構成するポリプロピレン（ＰＰ）等で成形された樹脂製基材３を備えており、該基材３の裏面には、２辺が車幅方向に平行に延びるとともに他の２辺が車体前後方向に平行に延びて、平面視で略矩形状をなす溝部５が形成されていて、この溝部５に対応する基材３部分が薄肉に形成されて、平面視略矩形状の破断予定部７とされている。 FIG. 1 shows a front part of a passenger seat of an instrument panel 1 which is an interior part for a vehicle with an airbag door assembled by an assembling method according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. The instrument panel 1 includes a resin base material 3 formed of polypropylene (PP) or the like that constitutes an interior product body (instrument panel body), and the back surface of the base material 3 has two sides. Extending in parallel to the vehicle width direction and the other two sides extending in parallel to the longitudinal direction of the vehicle body, a groove portion 5 having a substantially rectangular shape in plan view is formed. It is made into the fracture | rupture planned part 7 of the substantially rectangular shape in planar view.

そして、上記破断予定部７によって囲まれて、後述するエアバッグ装置３１の作動により上記破断予定部７を破断して展開するエアバッグドア部９が画成されている。このエアバッグドア部９は、上記破断予定部７を形成する溝部５が基材３表面側から識別できない所謂シームレスタイプに構成されている。   And the airbag door part 9 which is surrounded by the said fracture | rupture scheduled part 7 and fractures | ruptures and expand | deploys the said fracture | rupture scheduled part 7 by the action | operation of the airbag apparatus 31 mentioned later is comprised. The airbag door portion 9 is configured as a so-called seamless type in which the groove portion 5 forming the planned fracture portion 7 cannot be identified from the surface side of the base material 3.

上記エアバッグドア部９及びその周辺の基材３裏面には、樹脂製エアバッグシュート１１が振動溶着により一体に組み立てられている。このエアバッグシュート１１は、図２に示すように、エアバッグ装置３１を収容するための概略矩形筒状の枠体１３を備えており、この枠体１３の上端である開口端内側には、図３にも示すようにエアバッグが膨出する略矩形状のシューティング口１５が形成される一方、その外側には、枠体１３に略直交するようにシューティング口１５の周辺部から外方に向かって延びるフランジ部１７が一体に成形されている。   A resin air bag chute 11 is integrally assembled by vibration welding on the back surface of the air bag door 9 and the surrounding base material 3. As shown in FIG. 2, the airbag chute 11 includes a substantially rectangular tubular frame 13 for accommodating the airbag device 31. As shown in FIG. 3, a substantially rectangular shooting port 15 in which the airbag bulges is formed, and on the outer side thereof, outward from the peripheral portion of the shooting port 15 so as to be substantially orthogonal to the frame body 13. A flange portion 17 extending toward the top is integrally formed.

また、上記枠体１３のシューティング口１５を覆うように、基材３のエアバッグドア部９を補強するためのフラップ部１９が配置されていて、その車体前方側（基端側）がシューティング口１５の車体前側の縁部に設けられた断面Ｓ字状のヒンジ部２１に一体に連結されている。このヒンジ部２１及びフラップ部１９も枠体１３と一体に成形されており、これらは例えば、上記基材３よりも可撓性の高いサーモプラスチックオレフィン（ＴＰＯ）等の軟質樹脂からなる。   Further, a flap portion 19 for reinforcing the airbag door portion 9 of the base material 3 is disposed so as to cover the shooting port 15 of the frame body 13, and the front side (base end side) of the vehicle body is the shooting port. 15 is integrally connected to a hinge portion 21 having an S-shaped cross section provided at an edge on the front side of the vehicle body. The hinge portion 21 and the flap portion 19 are also integrally formed with the frame body 13, and are made of a soft resin such as a thermoplastic plastic olefin (TPO) having higher flexibility than the base material 3.

上記フランジ部１７及びフラップ部１９の表面には、図３に示すように、それぞれ格子状の溶着リブ２３，２５が縦横に一体に突設されており、これら溶着リブ２３，２５を介してフラップ部１９及びフランジ部１７が、それぞれ基材３のエアバッグドア部９裏面及びこれを囲む部位に振動溶着により固定されることで、その基材３裏側に、エアバッグドア部９に対応付けてエアバッグシュート１１が一体に取り付けられるようになっている。   As shown in FIG. 3, lattice-shaped welding ribs 23 and 25 are integrally projected vertically and horizontally on the surfaces of the flange portion 17 and the flap portion 19, and the flaps are interposed via the welding ribs 23 and 25. The part 19 and the flange part 17 are associated with the airbag door part 9 on the back side of the base material 3 by being fixed to the back surface of the air bag door part 9 of the base material 3 and the part surrounding it by vibration welding, respectively. The airbag chute 11 is attached integrally.

上記溶着リブ２３，２５は、フランジ部１７及びフラップ部１９の長手方向（図の横方向）である振動溶着時の振動方向に各々延びる複数の第１リブ２３（第１方向突条部）と、これら第１リブ２３に略直交して各々フランジ部１７及びフラップ部１９の幅方向（図の上下方向）に延びる複数の第２リブ２５（第２方向突条部）とからなり、詳しくは後述するが、上記第１リブ２３がインストルメントパネル１の基材３の裏面に溶着により固定されている一方、第２リブ２５は基材３の裏面に概ね当接した状態になっている（図４(c)を参照）。   The welding ribs 23 and 25 are a plurality of first ribs 23 (first direction protrusions) extending in the vibration direction at the time of vibration welding, which is the longitudinal direction (lateral direction in the drawing) of the flange portion 17 and the flap portion 19. The first rib 23 is composed of a plurality of second ribs 25 (second-direction ridges) extending in the width direction (vertical direction in the drawing) of the flange portion 17 and the flap portion 19 respectively substantially perpendicularly to the first ribs 23. As will be described later, the first rib 23 is fixed to the back surface of the base material 3 of the instrument panel 1 by welding, while the second rib 25 is in a state of being substantially in contact with the back surface of the base material 3 ( (See FIG. 4 (c)).

また、上記フランジ部１７の幅方向両端側においては、第２リブ２５の長手方向の端部が、最も外周縁寄りに位置する第１リブ２３を越えてフランジ部１７の外周縁側に突出している。このため、上述の如くエアバッグシュート１１を基材３裏側に取り付けた後に、両者の隙間を図３の上下方向に見れば、複数の第２リブ２５がそれぞれ基材３裏面に当接していて、浮き上がっていないことを目視にて確認することができる。   Further, at both ends in the width direction of the flange portion 17, the end portions in the longitudinal direction of the second ribs 25 protrude beyond the first ribs 23 positioned closest to the outer peripheral edge and protrude toward the outer peripheral edge side of the flange portion 17. . Therefore, after the airbag chute 11 is attached to the back side of the base material 3 as described above, the plurality of second ribs 25 are in contact with the back surface of the base material 3 when the gap between the two is viewed in the vertical direction in FIG. It can be visually confirmed that it is not lifted.

上記枠体１３内には、車体前後方向からの衝撃から助手席の乗員を保護するためのエアバッグ及びインフレータ等を備えたエアバッグ装置３１が収納されている。このエアバッグ装置３１には、複数のフック３３が車幅方向に間隔をあけて固定され、これらフック３３を枠体１３に形成された複数の掛合孔１３ａに挿入することで、エアバッグ装置３１の作動時に各フック３３が各掛合孔１３ａの周縁に引っ掛かり、枠体１３が飛び出さないようになっている。   An air bag device 31 including an air bag, an inflator, and the like for protecting the passenger in the front passenger seat from an impact from the front-rear direction of the vehicle body is housed in the frame 13. A plurality of hooks 33 are fixed to the airbag device 31 at intervals in the vehicle width direction, and the hook devices 33 are inserted into a plurality of engaging holes 13 a formed in the frame body 13, whereby the airbag device 31. Each of the hooks 33 is hooked on the periphery of each of the engaging holes 13a during the operation, so that the frame body 13 does not pop out.

上記エアバッグ装置３１の下端には、金属製ブラケット３５が溶接により固定されており、このブラケット３５を、車幅方向に延びてインストルメントパネル１を支持するインパネレインフォースメント４１のブラケット部４１ａに重ね合わせて、両者に形成された貫通孔（図示せず）にボルト３７を挿入し、これにナット３９を螺合させることにより、締結している。こうしてエアバッグ装置３１の下端部は、ブラケット３５を介してインパネレインフォースメント４１に連結支持されている。   A metal bracket 35 is fixed to the lower end of the airbag device 31 by welding, and the bracket 35 extends to the bracket portion 41a of the instrument panel reinforcement 41 that extends in the vehicle width direction and supports the instrument panel 1. The bolts 37 are overlapped, and bolts 37 are inserted into through holes (not shown) formed in both of them, and nuts 39 are screwed into the bolts 37 to fasten them. Thus, the lower end portion of the airbag device 31 is connected and supported to the instrument panel reinforcement 41 via the bracket 35.

上述の如く構成されたインストルメントパネル１では、車両が衝突すると、エアバッグ装置３１のエアバッグがインフレータの作動によって膨出し、その膨出圧でエアバッグドア部９及びフラップ部１９が上方に押圧されて破断予定部７が破断するとともにヒンジ部２１が直線状態に伸び、これにより、エアバッグドア部９がフラップ部１９と一体になって上方に突出し、その後、上記ヒンジ部２１を開作動支点として回動して、車体後方上向きに開くようになる。   In the instrument panel 1 configured as described above, when the vehicle collides, the airbag of the airbag device 31 is inflated by the operation of the inflator, and the airbag door portion 9 and the flap portion 19 are pressed upward by the inflation pressure. And the hinge portion 21 extends in a straight line state, thereby causing the airbag door portion 9 to protrude upward integrally with the flap portion 19. Thereafter, the hinge portion 21 is opened as an opening fulcrum. As a result, the vehicle body opens rearward and upward.

次に、本発明の特徴として、上記エアバッグシュート１１の基材３裏面への振動溶着について図４及び図５に基づいて説明する。まず、振動溶着前の第１及び第２リブ２３，２５の形状は、図３の一部を拡大して図４(a)，(b)に示すように、振動溶着の際の振動方向に延びる第１リブ２３は、これに略直交する第２リブ２５よりも所定量、高く突設されており、その突端に開放するようにして断面Ｖ字状の溝部２３ａが形成されている。一方、相対的に低い第２リブ２５の突端は概略平坦な面に形成されている。   Next, as a feature of the present invention, vibration welding of the airbag chute 11 to the back surface of the base material 3 will be described with reference to FIGS. First, the shapes of the first and second ribs 23 and 25 before vibration welding are enlarged in a part of FIG. 3 in the vibration direction during vibration welding as shown in FIGS. 4 (a) and 4 (b). The extending first rib 23 protrudes by a predetermined amount higher than the second rib 25 substantially orthogonal thereto, and a groove 23a having a V-shaped cross section is formed at the protruding end. On the other hand, the protruding end of the relatively low second rib 25 is formed on a substantially flat surface.

そのように第１及び第２リブ２３，２５が形成されたフランジ部１７及びフラップ部１９の表面が下方を向くようにして、エアバッグシュート１１を上側の第１振動溶着治具４３にセットする（図５を参照）。この際、第１リブ２３が振動方向（図の紙面に垂直な方向）に延びるようにセットする。また、基材３はその裏面側が上方を向くようにして下側の第２振動溶着治具４５にセットする。   The airbag chute 11 is set on the upper first vibration welding jig 43 so that the surfaces of the flange portion 17 and the flap portion 19 on which the first and second ribs 23 and 25 are formed face downward. (See FIG. 5). At this time, the first rib 23 is set so as to extend in the vibration direction (direction perpendicular to the drawing sheet). Further, the base material 3 is set on the lower second vibration welding jig 45 so that the back side thereof faces upward.

そして、図５に示すように、上記第１及び第２振動溶着治具４３，４５でエアバッグシュート１１と基材３とをエアバッグシュート１１を基材３の裏面に配置させて挟持し、この状態で上側の第１振動溶着治具４３を上方から第２振動溶着治具４５に押し付けながら、所定の方向（図において紙面に直交する方向）に加振する。こうすると、まず、基材３裏面に接触している第１リブ２３の突端、即ちその溝部２３ａの側壁の稜線部が摩擦熱によって溶融し、基材３の裏面に接着される。   Then, as shown in FIG. 5, the airbag chute 11 and the base material 3 are sandwiched between the first and second vibration welding jigs 43 and 45 by placing the airbag chute 11 on the back surface of the base material 3, In this state, the upper first vibration welding jig 43 is vibrated in a predetermined direction (a direction perpendicular to the paper surface in the drawing) while pressing the upper first vibration welding jig 43 against the second vibration welding jig 45 from above. If it carries out like this, the protrusion of the 1st rib 23 which is contacting the base material 3 back surface, ie, the ridgeline part of the side wall of the groove part 23a, will fuse | melt by friction heat, and will be adhere | attached on the back surface of the base material 3.

そうして第１リブ２３がその突端側から所定量、溶減したときに、第２リブ２５の突端の一部が基材３裏面に当接し始め、その一部が摩擦熱によって溶け始めるが、この実施形態では第２リブ２５の略全体が基材３裏面に当接した頃に、加振を停止する。こうすると、図４(c)に示すように、第１リブ２３が基材３の裏面に溶着により固定された状態で、第２リブ２５の略全体が基材３裏面に当接することになる。   Then, when the first rib 23 is melted by a predetermined amount from the protruding end side, a part of the protruding end of the second rib 25 starts to contact the back surface of the base material 3, and a part of the protruding start starts to melt due to frictional heat. In this embodiment, the excitation is stopped when substantially the entire second rib 25 comes into contact with the back surface of the substrate 3. As a result, as shown in FIG. 4C, substantially the entire second rib 25 comes into contact with the back surface of the base material 3 in a state where the first rib 23 is fixed to the back surface of the base material 3 by welding. .

このことで、基材３裏面に接合されたフランジ部１７やフラップ部１９が基材３に対し大きく傾く虞れがなく、全体が略均一の強度で取り付けられることになり、エアバッグシュート１１によってエアバッグの展開作動を安定的に確保することができるとともに、その際にエアバッグドア部９が吹き飛ばされて車両の乗員に衝突する心配もなくなり、安全面でも好ましい。   By this, there is no possibility that the flange part 17 and the flap part 19 joined to the back surface of the base material 3 are largely inclined with respect to the base material 3, and the whole is attached with substantially uniform strength. The airbag deployment operation can be stably secured, and there is no fear of the airbag door portion 9 being blown off and colliding with the vehicle occupant at that time, which is also preferable in terms of safety.

しかも、そうしてフランジ部１７やフラップ部１９が基材３裏面に接合された状態では、突端側が基材３の裏面に溶着固定されている第１リブ２３と、突端面が基材３の裏面に当接している第２リブ２５との高さが殆ど変わらないので、該基材３を薄くしても、基材３の表面に波打つような模様が浮き出る虞れはない。よって外観不良が発生せず、見栄えが向上する。   In addition, in the state where the flange portion 17 and the flap portion 19 are bonded to the back surface of the base material 3, the first rib 23 having the protruding end side welded and fixed to the back surface of the base material 3 and the protruding end surface of the base material 3. Since the height of the second rib 25 that is in contact with the back surface is almost the same, even if the base material 3 is made thin, there is no possibility that a wavy pattern appears on the surface of the base material 3. Therefore, no appearance defect occurs and the appearance is improved.

尚、前記のように第２リブ２５が基材３裏面にちょうど当接した状態で、振動溶着を終了するためには、第２リブ２５が接触し始めると、摩擦抵抗が急増することを利用して、その時期を予め実験により求めておき、この時期に振動溶着を終了するようにすればよい。そうしても前記のように第２リブ２５の一部は溶融し、基材３裏面に溶着すると考えられるが、この溶着量は少しであれば何ら問題はなく、例えば図４(d)に示すように第２リブ２５が基材３裏面から浮き上がっている状態と比較すれば強度が高くなるので、むしろ好ましいといえる。   In order to end the vibration welding with the second rib 25 just in contact with the back surface of the base material 3 as described above, the fact that the frictional resistance suddenly increases when the second rib 25 starts to contact is used. Then, the timing may be obtained in advance by experiments, and vibration welding may be terminated at this timing. Even so, it is considered that a part of the second rib 25 is melted and welded to the back surface of the base material 3 as described above. However, there is no problem as long as this welding amount is small, for example, as shown in FIG. As shown, the second rib 25 is more preferable than the state in which the second rib 25 is lifted from the back surface of the base material 3.

つまり、この実施形態のように第１リブ２３を基材３の裏面に溶着により固定する一方、第２リブ２５は基材３裏面に当接させるというは、第２リブ２５の一部が溶着している状態も含めて、要するに、振動溶着後の第１リブ２３の高さが振動溶着前の第２リブ２５の高さと概略、一致するように、振動溶着の条件を設定すればよいのである。 That is, as in this embodiment, the first rib 23 is fixed to the back surface of the base material 3 by welding while the second rib 25 is brought into contact with the back surface of the base material 3. and including in that state, in short, the height of the first rib 23 after the vibration welding height and outline of the second rib 25 before vibration welding, as match, may be set to conditions of vibration soluble adhesive It is.

上述した実施形態のエアバッグシュート１１は、フランジ部１７の他、ヒンジ部２１及びフラップ部１９も枠体１３と一体にＴＰＯ等により成形しているが、これに限らず、例えば、枠体１３の主要部を硬質樹脂により形成して、上記フランジ部１７、フラップ部１９及びヒンジ部２１等の一体成形品に組み付けるようにしてもよい。   In the airbag chute 11 of the above-described embodiment, the hinge portion 21 and the flap portion 19 as well as the flange portion 17 are formed integrally with the frame body 13 by TPO or the like, but not limited thereto, for example, the frame body 13 The main part may be formed of a hard resin and assembled to an integrally molded product such as the flange part 17, the flap part 19, and the hinge part 21.

また、上記実施形態では、エアバッグシュート１１の１枚のフラップ部１９が、インストルメントパネル基材３のエアバッグドア部９と一体になって車体後方上向きに開くようになっているが、これに限らず、例えば２枚のフラップ部がそれぞれ車体前後のヒンジ部を回動支点にして、車体後方上向き及び車体前方上向きに開くように（所謂観音開きに）構成してもよい。   Moreover, in the said embodiment, although the one flap part 19 of the airbag chute | shoot 11 is united with the airbag door part 9 of the instrument panel base material 3, it opens the vehicle body back upward, For example, the two flap portions may be configured to open rearwardly upward and forwardly forward of the vehicle body (so-called double doors) with the hinge portions at the front and rear of the vehicle body as pivot points.

また、上記実施形態では、破断予定部７をインストルメントパネル本体７の裏面に形成された溝部９によって形成したが、これに限らず、例えば針状穴を密接させて多数凹設することで破断予定部７を形成してもよい。   Moreover, in the said embodiment, although the fracture | rupture planned part 7 was formed by the groove part 9 formed in the back surface of the instrument panel main body 7, it is not restricted to this, For example, it breaks by making many needle-shaped holes closely provided concavely The planned portion 7 may be formed.

さらに、上記実施形態では、車両用内装品がインストルメントパネル１である場合を示したが、本発明は他の車両用内装品にも適用することができる。   Furthermore, in the said embodiment, although the case where the vehicle interior goods were the instrument panels 1 was shown, this invention is applicable also to another vehicle interior goods.

この発明は、例えば、インストルメントパネル等の車両用内装品の組立て方法に適用可能である。 The present invention is applicable to, for example, a method for assembling vehicle interior parts such as instrument panels.

実施形態に係る組立て方法により組み立てられた車両用内装品であるインストルメントパネルの助手席前方部分を示す斜視図である。It is a perspective view showing a passenger seat forward portion of the instrument panel is a vehicle interior trim assembled by the assembly method according to the embodiment form state. 図１及び図３のII−II線における断面図である。It is sectional drawing in the II-II line of FIG.1 and FIG.3. 実施形態におけるエアバッグシュートの平面図である。It is a top view of the air bag chute in an embodiment. (a)は図３の一部を拡大して示す図であり、(b)は、そのb-b線における断面図である。(c)，(d)は、それぞれ適正及び不適正な溶着状態を示す図(b)相当図である。(a) is a figure which expands and shows a part of FIG. 3, (b) is sectional drawing in the bb line. (c), (d) is a figure corresponding to the figure (b) which shows a proper and improper welding state, respectively. 実施形態における振動溶着の要領を示す説明図である。It is explanatory drawing which shows the point of the vibration welding in embodiment.

１ インストルメントパネル（車両用内装品）
３ 基材(内装品本体)
７ 破断予定部
９ エアバッグドア部
１１ エアバッグシュート
１３ 枠体
１７ フランジ部
１９ フラップ部
２１ ヒンジ部
２３ 第１リブ（第１方向突条部）
２５ 第２リブ（第２方向突条部） 1 Instrument panel (vehicle interior)
3 Base material (interior product body)
7 scheduled break portion 9 airbag door portion 11 airbag chute 13 frame 17 flange portion 19 flap portion 21 hinge portion 23 first rib (first direction protrusion)
25 2nd rib (second direction ridge)

Claims (2)

エアバッグ装置(31)の作動により展開するエアバッグドア部(9)が破断予定部(7)で区画された内装品本体(3)と、該内装品本体(3)の裏面に上記エアバッグドア部(9)に対応して一体に取り付けられたエアバッグシュート(11)と、を備えたエアバッグドア部付き車両用内装品の組立て方法であって、
上記エアバッグシュート(11)は、上記内装品本体(3)の裏面において上記エアバッグドア部(9)を囲む部位に振動溶着されるフランジ部(17)を有し、上記エアバッグ装置(31)が収容される枠体(13)と、
上記エアバッグドア部(9)の裏面に振動溶着されるフラップ部(19)と、
上記枠体(13)とフラップ部(19)の基端側とを一体に連結するヒンジ部(21)と、を備えており、
上記フランジ部(17)及びフラップ部(19)の少なくとも一方には、各々振動溶着の振動方向に延びる複数の第１方向突条部(23)と、各々振動方向に略直交する方向に延び、突端が概略平坦な面に形成された複数の第２方向突条部(25)とが、互いに交差して格子状に形成され、かつ上記第１方向突条部(23)は第２方向突条部(25)よりも高く突設されており、
上記エアバッグシュート(11)を上記内装品本体(3)の裏面に配置した状態で、上記第１方向突条部(23)を上記内装品本体(3)の裏面に押し付けて加振することにより突端を溶融させて内装品本体(3)の裏面に振動溶着して固定する一方、上記第２方向突条部(25)の突端を上記第１方向突条部(23)が振動溶着により溶減することにより内装品本体(3)の裏面に当接させて内装品(1)を組み立てることを特徴とするエアバッグドア部付き車両用内装品の組立て方法。 The airbag door (9) that is deployed by the operation of the airbag device (31) is divided into the interior part main body (3) partitioned by the part to be broken (7), and the airbag on the back surface of the interior part main body (3). An air bag chute (11) attached integrally to the door portion (9), and an assembly method for a vehicle interior with an air bag door portion,
The airbag chute (11) has a flange portion (17) that is vibration welded to a portion surrounding the airbag door portion (9) on the back surface of the interior body (3), and the airbag device (31 ) In which the frame is housed (13),
A flap portion (19) that is vibration welded to the back surface of the airbag door portion (9);
A hinge portion (21) that integrally connects the frame (13) and the base end side of the flap portion (19),
At least one of the flange part (17) and the flap part (19) has a plurality of first direction protrusions (23) each extending in the vibration direction of vibration welding, each extending in a direction substantially perpendicular to the vibration direction , A plurality of second direction protrusions (25) having protrusions formed on a substantially flat surface intersect with each other to form a lattice shape, and the first direction protrusions (23) protrude in the second direction. Projected higher than the strip (25),
With the airbag chute (11) arranged on the back surface of the interior product body (3), the first direction protrusion (23) is pressed against the back surface of the interior product body (3) and vibrated. The tip end is melted and fixed on the back surface of the interior product body (3) by vibration welding, while the tip end of the second direction protrusion portion (25) is connected to the first direction protrusion portion (23) by vibration welding. A method for assembling an interior part for a vehicle with an air bag door, wherein the interior part (1) is assembled by being brought into contact with the back surface of the interior part body (3) by melting. 上記第１及び第２方向突条部(23,25)が少なくとも上記フランジ部(17)に形成され、該フランジ部(17)における各第２方向突条部(25)の長手方向の端部が、それぞれ第１方向突条部(23)よりもフランジ部(17)外周縁側に突出していることを特徴とする請求項１のエアバッグドア部付き車両用内装品の組立て方法。 The first and second direction protrusions (23, 25) are formed at least on the flange part (17), and the longitudinal ends of the second direction protrusions (25) in the flange part (17). 2. The method of assembling an interior part for a vehicle with an air bag door according to claim 1, wherein each of the protrusions protrudes toward the outer peripheral edge of the flange part (17) from the first direction protrusion (23).
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