JP4381502B2 - Resin member mounting structure - Google Patents

Resin member mounting structure Download PDF

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Publication number
JP4381502B2
JP4381502B2 JP12149999A JP12149999A JP4381502B2 JP 4381502 B2 JP4381502 B2 JP 4381502B2 JP 12149999 A JP12149999 A JP 12149999A JP 12149999 A JP12149999 A JP 12149999A JP 4381502 B2 JP4381502 B2 JP 4381502B2
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Japan
Prior art keywords
resin member
mounting
grommet
mounting structure
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP12149999A
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Japanese (ja)
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JP2000310209A (en
Inventor
高橋　　毅
英明 西脇
良紀 浅田
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Hayashi Engineering Inc
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Hayashi Engineering Inc
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Priority to JP12149999A priority Critical patent/JP4381502B2/en
Publication of JP2000310209A publication Critical patent/JP2000310209A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

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  • Dowels (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Connection Of Plates (AREA)

Description

【０００１】
【発明が属する技術分野】
この発明は樹脂部材の相手材への取付構造に関し、特に自動車のフェンダーライナーのホイールハウスへの取付構造に関する。
【０００２】
【従来の技術】
自動車のホイールハウスの上面をおおうフェンダー部ボディはホイールを受け入れるアーチ状に形成されてあり、フェンダー部ボディのアーチ内面には樹脂製のフェンダーライナーを取り付け、自動車の走行時にホイールが跳ね上げる泥水や小石からボディを保護している。
フェンダーライナーは、ポリエチレン樹脂等の熱可塑性樹脂に各種の充填材を混入した組成物を、厚さ数ミリのシートに形成し、真空成形、圧空成形、プレス成形等おこなって、取付位置のフェンダーアーチに沿う形状となしている。フェンダーライナーはフェンダー部ボディに、また隣接する他のボディ部材（バンパーフェイシア等）にネジ止めにより取着される。
【０００３】
真空成形等によってフェンダーライナーのような絞りの深い成形品の成形をおこなった場合、成形前の樹脂シートの板厚が均一であっても成形後には、深い絞りを受ける部位は他の部位より板厚が薄くなる傾向がある。
特にグロメット・スクリューによる取付構造では、樹脂シートの板厚が薄い部位において、フェンダーライナーを隣接するボディ部材に取付けるのに適さない場合が生じ得る。
【０００４】
図２（ａ）を参照して説明すると、樹脂部材（フェンダーライナー）１１０を取付相手材（フェンダー部ボディ）１２０に共通する開孔１１１、１２１をもって隣接・配置し、グロメット１３０（鍔部１３１と鍔部から延設された複数に分割される脚部１３２、１３２、通孔１３３を含む）を樹脂部材（取付相手材）の開孔に挿入し、次にこのグロメットの脚部通孔にスクリュー１４０を挿入することでグロメットの分割された脚部が押し広げられ取付相手材の開孔のエッジに係合して樹脂部材を取付相手材に取付ける。この際、グロメットの鍔部から取付相手材までの間隔はあらかじめ設定された範囲の値であり、グロメットおよびスクリューはこの値にあったサイズのものを用いる。
もしこの間隔が設計の範囲を越えて大きい場合（樹脂部材の板厚が厚い場合）、グロメットの脚部が取付相手材に届かず、係合ができない。逆に間隔が設計の範囲を越えて小さい場合（樹脂部材の板厚が薄い場合）、図２（ｂ）に示すように、樹脂部材と取付相手材の間に隙間Ｓが生じて、フェンダーライナーのフェンダー部ボディへの取付状態が不十分になる。
この隙間を生じないようにするには、グロメット（スクリュー）を場所によって使い分ける方法や、図に示すようにスペーサー１４５を介在させる方法がある。しかし、いずれの場合でもグロメットの鍔部から取付相手材までの間隔のばらつきが制御できないため、その誤差に細かく対応することはできない。
【０００５】
【発明が解決しようとする課題】
本発明は上記課題にかんがみなされたもので、取付相手材と樹脂部材のグロメット・スクリューによる取付構造において、グロメットの鍔部から取付相手材までの間隔の変化に対応する樹脂部材の取付構造に関する。
【０００６】
【課題を解決するための手段】
課題を解決するための本発明の手段は、取付相手材の表面に隣接して樹脂部材を配し、樹脂部材と取付相手材の共通する位置に複数の開孔をもうけ、これら開孔に樹脂部材側から取付相手材側に向かってグロメット・スクリューを挿入し樹脂部材を取付相手材に固定する樹脂部材の取付構造であって、前記開孔のうち樹脂部材の板厚が薄い部位に形成されるものの周囲には樹脂部材表面向きの凸リブが一体的に形成され、前記凸リブは、前記開孔の両側に、開孔に対して外側が内側より高さの高い凸リブが配置されている樹脂部材の取付構造による。
【０００７】
【作用】
本発明の樹脂部材の取付構造では、あらかじめグロメットの鍔部から取付相手材までの間隔が設定値より小さくなることが予想される部位（樹脂部材の肉厚が薄くなることが予想される部位）では、樹脂部材表面向きの凸リブが一体的に形成される。この凸リブはグロメットの鍔部を押圧支持してグロメットの鍔部から取付相手材までの間隔を設計値に保つものである。
【０００８】
【発明の実施の形態】
図１には、取付相手材としての自動車のフェンダー部ボディ２０に、樹脂部材としてのフェンダーライナー１０が取付けられた状態の（外側と内側の高さが等しい）一般例を断面図に示す。フェンダー部ボディに沿う形状に成形されたフェンダーライナーがフェンダー部ボディに隣接・配置され、それぞれの共通する位置にある開孔１１、２１にグロメット・スクリュー３０、４０を挿入することで、フェンダー部ボディに固定される。
【０００９】
グロメット３０は鍔部３１と鍔部から延設された複数に分割される脚部３２、３２からなる。脚部には通孔３３を含む。グロメットの脚部の通孔にスクリュー４０を挿入することでグロメットの分割された脚部が押し広げられ取付相手材の開孔２１のエッジに係合して樹脂部材を取付相手材に固定する。
【００１０】
フェンダーライナーは厚さ０．５〜２ｍｍ程度の熱可塑性樹脂シート（ポリエチレン樹脂やエラストマーなど）を真空成形、圧空成形、プレス成形等によって、所要のフェンダー部ボディに沿う形状に成形する。これらの成形によって熱可塑性樹脂シートは引き伸ばされ、厚さはわずかに薄くなるが、成形形状によって、絞りが深い部位では厚さの薄くなり方が多くなる。
【００１１】
図１は、このようなフェンダーライナーの板厚が特に薄くなった部位の断面図であり、グロメットの鍔部３１から取付相手材２０までの間隔が、樹脂部材表面向きの凸リブ１２、１２を形成することで補償されている。
凸リブは、樹脂部材の成形と同時に一体的に成形され、開孔の周囲に複数に分割して形成、配置する。凸リブの高さは、樹脂部材の板厚の変化率によって、０．５ｍｍ〜２．０ｍｍほどの高さに形成するのが好ましい。凸リブはグロメットの鍔部を押圧するものであるが、過度の押圧では撓んで、押圧を軽減する作用があるのが好ましい。
【００１２】
図３（ａ）は外側と内側の高さが等しい一般的な凸リブを示し、図３（ｂ）〜（ｃ）は本発明実施例としての外側が内側より高さの高い各種の凸リブを示す。
図３（ｂ）の実施例において、フェンダーライナー１６０の開孔１６１の両側には、高さの異なる直線状の凸リブ１６２ａと１６２ｂが平行に配置されている。外側にの凸リブ１６２ｂの高さを内側の１６２ａより高くすることでグロメットの鍔部が撓みやすく、過度の押圧が作用することがない。図３（ｃ）の実施例において、フェンダーライナー１７０の開孔１７１の両側には、直線状の凸リブ１７２が放射状に配置されている。凸リブ１７２の高さを内側より外側で高くすることでグロメットの鍔部が撓みやすく、過度の押圧が作用することがない。
【００１３】
【発明の効果】
本発明の樹脂部材の取付構造は、取付相手材と樹脂部材のグロメット・スクリューによる取付構造において、グロメットの鍔部から取付相手材までの間隔を一定に保ち、板厚の異なる樹脂部材に対して、同一種のグロメット・スクリューを適用することができる。特殊な取付具等を設計、利用する必要がない。
真空成形、プレス成形等の各種の成形方法にて成形される材質、厚さの異なる各種の熱可塑性樹脂部材に適用できる。凸リブ形状の設計の自由度が高い。
【図面の簡単な説明】
【図１】 一般例としての樹脂部材の取付構造を断面図で示す
【図２】 従来の樹脂部材の取付構造を断面図で示す
【図３】 （ｂ）〜（ｃ）に本発明の実施例としての各種凸リブの斜視図を示し、（ａ）は外側と内側の高さが等しい一般的な凸リブを示す。 [0001]
[Technical field to which the invention belongs]
The present invention relates to a structure for mounting a resin member to a mating member, and more particularly to a structure for mounting a fender liner of an automobile to a wheel house.
[0002]
[Prior art]
The fender body that covers the upper surface of the wheel house of the automobile is formed in an arch shape that accepts the wheel, and a fender liner made of resin is attached to the inner surface of the arch of the fender body, and muddy water and pebbles that the wheel jumps up when the automobile is running Protects the body from
The fender liner is formed by forming a composition in which various fillers are mixed into a thermoplastic resin such as polyethylene resin into a sheet with a thickness of several millimeters, and performing vacuum forming, pressure forming, press forming, etc. The shape along the line. The fender liner is attached to the fender body and to other adjacent body members (such as a bumper fascia) by screws.
[0003]
When molding a deeply drawn product such as a fender liner by vacuum forming or the like, the part that receives the deep drawing after molding is more plate-like than the other parts even if the thickness of the resin sheet before molding is uniform. There is a tendency for the thickness to decrease.
In particular, in the mounting structure using a grommet screw, there may be a case where the fender liner is not suitable for mounting to an adjacent body member at a portion where the plate thickness of the resin sheet is thin.
[0004]
Referring to FIG. 2A, the resin member (fender liner) 110 is disposed adjacent to and arranged with the openings 111 and 121 common to the mounting counterpart material (fender portion body) 120, and the grommet 130 (with the flange portion 131). A plurality of leg portions 132 and 132 extending from the collar portion (including the through holes 133) are inserted into the openings of the resin member (attachment counterpart material), and then the screws are inserted into the grommet leg portion through holes. By inserting 140, the divided leg portions of the grommets are expanded and engaged with the edge of the opening of the attachment counterpart material, and the resin member is attached to the attachment counterpart material. At this time, the distance from the flange portion of the grommet to the attachment counterpart material is a value within a preset range, and grommets and screws having a size suitable for this value are used.
If this distance is larger than the design range (when the thickness of the resin member is thick), the grommet legs do not reach the mounting mating member and cannot be engaged. On the other hand, when the distance is smaller than the design range (when the thickness of the resin member is small), as shown in FIG. 2 (b), a gap S is generated between the resin member and the mounting counterpart material, and the fender liner The attachment state to the fender body is insufficient.
In order to prevent this gap from occurring, there are a method of properly using grommets (screws) depending on a place and a method of interposing a spacer 145 as shown in the figure. However, in any case, since it is impossible to control the variation in the distance from the flange portion of the grommet to the attachment counterpart material, it is not possible to deal with the error in detail.
[0005]
[Problems to be solved by the invention]
The present invention has been considered in view of the above problems, and relates to a mounting structure of a resin member corresponding to a change in a distance from a flange portion of the grommet to a mounting mating member in a mounting structure of the mounting mating member and the resin member by a grommet screw.
[0006]
[Means for Solving the Problems]
The means of the present invention for solving the problem is that a resin member is arranged adjacent to the surface of the mounting partner material, a plurality of holes are provided at positions common to the resin member and the mounting partner material, and the resin is provided in these openings. A resin member mounting structure in which a grommet screw is inserted from the member side toward the mounting partner material side to fix the resin member to the mounting partner material, and is formed in a portion of the opening where the thickness of the resin member is thin. Convex ribs facing the surface of the resin member are integrally formed on the periphery of the object, and the convex ribs are arranged on both sides of the aperture with convex ribs whose outer side is higher than the inner side with respect to the aperture. Depends on the resin member mounting structure.
[0007]
[Action]
In the resin member mounting structure of the present invention, a portion where the distance from the grommet's buttocks to the mounting partner material is expected to be smaller than the set value in advance (the portion where the thickness of the resin member is expected to be thin). Then, the convex rib facing the resin member surface is integrally formed. The convex rib presses and supports the grommets of the grommets to keep the distance from the grommets of the grommets to the mounting mating member at a design value.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view showing a general example in which a fender liner 10 as a resin member is attached to a fender portion body 20 of an automobile as an attachment partner material (the outer and inner heights are equal) . A fender liner formed in a shape along the fender body is disposed adjacent to the fender body, and the grommet screws 30 and 40 are inserted into the holes 11 and 21 at the common positions of the fender body. Fixed to.
[0009]
The grommet 30 includes a flange 31 and a plurality of legs 32 and 32 extending from the flange. The leg includes a through hole 33. By inserting the screw 40 into the through-hole of the leg part of the grommet, the divided leg part of the grommet is expanded and engaged with the edge of the opening 21 of the mounting partner material, thereby fixing the resin member to the mounting partner material.
[0010]
The fender liner is formed by forming a thermoplastic resin sheet (polyethylene resin, elastomer, etc.) having a thickness of about 0.5 to 2 mm into a shape along the required fender body by vacuum forming, pressure forming, press forming or the like. By these moldings, the thermoplastic resin sheet is stretched and the thickness is slightly reduced. However, depending on the molding shape, the thickness is often reduced at a deeper portion of the diaphragm.
[0011]
FIG. 1 is a cross-sectional view of a portion where the thickness of such a fender liner is particularly thin. The distance from the grommet collar 31 to the mounting mating member 20 is such that the convex ribs 12 and 12 facing the resin member surface are arranged. Compensated by forming.
The convex rib is integrally formed simultaneously with the molding of the resin member, and is formed and arranged in a plurality of portions around the opening. The height of the convex rib is preferably formed to a height of about 0.5 mm to 2.0 mm depending on the rate of change in the thickness of the resin member. Although the convex rib presses the collar portion of the grommet, it is preferable that the convex rib bends by excessive pressing and has an action of reducing the pressing.
[0012]
3A shows a general convex rib having the same height on the outer side and the inner side, and FIGS. 3B to 3C show various convex ribs whose outer side is higher than the inner side as an embodiment of the present invention. Indicates.
In the embodiment of FIG. 3B, linear convex ribs 162a and 162b having different heights are arranged in parallel on both sides of the opening 161 of the fender liner 160. By making the height of the convex rib 162b on the outer side higher than that on the inner side 162a, the grommets of the grommet are easily bent and excessive pressing does not act. In the embodiment of FIG. 3C, linear convex ribs 172 are radially arranged on both sides of the opening 171 of the fender liner 170. By increasing the height of the convex rib 172 on the outer side from the inner side, the grommets of the grommet are easily bent, and excessive pressing does not act.
[0013]
【The invention's effect】
The mounting structure of the resin member according to the present invention is a mounting structure using a grommet screw for the mounting partner material and the resin member. The same kind of grommet screw can be applied. There is no need to design and use special fixtures.
The present invention can be applied to various thermoplastic resin members having different materials and thicknesses formed by various molding methods such as vacuum molding and press molding. The degree of freedom in designing the convex rib shape is high.
[Brief description of the drawings]
Practice of the present invention in FIG. 1 shows a mounting structure of a resin member as a general example a mounting structure of Figure 2 A conventional resin member shown in cross-section in a cross-sectional view [FIG 3] (b) ~ (c) The perspective view of the various convex rib as an example is shown, (a) shows the general convex rib with the same height of an outer side and an inner side.

Claims (1)

取付相手材の表面に隣接して樹脂部材を配し、樹脂部材と取付相手材の共通する位置に複数の開孔をもうけ、これら開孔に樹脂部材側から取付相手材側に向かってグロメット・スクリューを挿入し樹脂部材を取付相手材に固定する樹脂部材の取付構造であって、前記開孔のうち樹脂部材の板厚が薄い部位に形成されるものの周囲には樹脂部材表面向きの凸リブが一体的に形成され、前記凸リブは、前記開孔の両側に、開孔に対して外側が内側より高さの高い凸リブが配置されていることを特徴とする樹脂部材の取付構造。A resin member is arranged adjacent to the surface of the mounting partner material, and a plurality of holes are provided at positions common to the resin member and the mounting partner material, and grommets are provided in these openings from the resin member side toward the mounting partner material side. A resin member mounting structure in which a screw is inserted and a resin member is fixed to a mounting partner material, and a convex rib facing the surface of the resin member is formed around a portion of the opening formed in a portion where the plate thickness of the resin member is thin Is formed integrally, and the convex ribs are arranged on both sides of the opening with convex ribs whose outer side is higher than the inner side with respect to the opening .
JP12149999A 1999-04-28 1999-04-28 Resin member mounting structure Expired - Fee Related JP4381502B2 (en)

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Application Number Priority Date Filing Date Title
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JP4381502B2 true JP4381502B2 (en) 2009-12-09

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0531933U (en) * 1991-10-03 1993-04-27 積水化学工業株式会社 Assembly product parts fixing structure
JP2588705Y2 (en) * 1991-11-25 1999-01-13 トヨタ車体株式会社 Fender liner clip fastening structure
JPH09229030A (en) * 1996-02-27 1997-09-02 Aoyama Seisakusho:Kk Fastening clip

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