JP2976756B2 - Terminal structure of bumper fascia - Google Patents
Terminal structure of bumper fasciaInfo
- Publication number
- JP2976756B2 JP2976756B2 JP5200935A JP20093593A JP2976756B2 JP 2976756 B2 JP2976756 B2 JP 2976756B2 JP 5200935 A JP5200935 A JP 5200935A JP 20093593 A JP20093593 A JP 20093593A JP 2976756 B2 JP2976756 B2 JP 2976756B2
- Authority
- JP
- Japan
- Prior art keywords
- bumper
- mounting surface
- side mounting
- ribs
- fascia
- 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 - Lifetime
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車用バンパーにお
ける樹脂製のバンパーフェイシアの端末部構造に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal structure of a resin bumper fascia in an automobile bumper.
【０００２】[0002]
【従来の技術】自動車用バンパーを形成する樹脂製のバ
ンパーフェイシアを車体側に固定するにあたり、図４に
示すように、フロントフェンダー３１に車体側取付面３
２を予め形成する一方で、バンパーフェイシア３３のバ
ンパーサイド部３３ａ側の端末部に車体前後方向から前
記車体側取付面３２と正対するバンパー側取付面３４を
形成しておき、これら車体側取付面３２とバンパー側取
付面３４とを突き合わせた上で、両者を図示外のボルト
およびナットで共締めして固定することがある（類似構
造として、例えば特開昭６０−４４４３号公報に紹介さ
れているものがある）。2. Description of the Related Art In fixing a resin bumper fascia forming a vehicle bumper to a vehicle body, as shown in FIG.
2, a bumper-side mounting surface 34 facing the vehicle-side mounting surface 32 is formed in a terminal portion of the bumper fascia 33 on the side of the bumper side portion 33a from the vehicle front-rear direction. 32 and the bumper-side mounting surface 34, but they may be fixed together by bolts and nuts (not shown), for example, as disclosed in Japanese Patent Application Laid-Open No. 60-4443. Some are).
【０００３】このような場合、前記バンパー側取付面３
４を補強する目的で図５に示すように該バンパー側取付
面３４に予め金属製のリテーナ３５をビスにて取り付け
ておき、このリテーナ３５を介して車体側取付面３２と
バンパー側取付面３４とを突き合わせて両者を固定する
ようにしている。In such a case, the bumper side mounting surface 3
As shown in FIG. 5, a metal retainer 35 is attached to the bumper-side mounting surface 34 with screws in advance for the purpose of reinforcing the vehicle body 4, and the vehicle-body-side mounting surface 32 and the bumper-side mounting surface 34 are connected via the retainer 35. And they are fixed to each other.
【０００４】[0004]
【発明が解決しようとする課題】上記のような従来の構
造においては、バンパーフェイシア成形後に２次加工と
してリテーナ３５をバンパーフェイシア３３に取り付け
る必要があり、部品点数の増加と組付工数の増大を余儀
なくされている。In the conventional structure as described above, it is necessary to attach the retainer 35 to the bumper fascia 33 as a secondary process after the bumper fascia molding, which increases the number of parts and the number of assembling steps. Have been forced.
【０００５】また、上記のバンパーフェイシア３３は、
図６にも示すように、一般的に射出成形法のもとに型締
め工程、射出工程、型開き・製品押し出し工程の各工程
を経て成形されることになるのであるが、前記バンパー
側取付面３４を含むバンパーサイド部３３ａの剛性が充
分でないために、特にバンパーサイド部３３ａの長さの
大きいものについては金型３６からの製品押し出し時に
そのバンパーサイド部３３ａが外側に開き加減となって
いわゆる口開き現象が生じやすい。The above bumper fascia 33 is
As shown in FIG. 6, the molding is generally performed through the steps of a mold clamping step, an injection step, a mold opening and a product extrusion step based on the injection molding method. Because the rigidity of the bumper side portion 33a including the surface 34 is not sufficient, especially when the bumper side portion 33a has a large length, the bumper side portion 33a opens outwardly when the product is pushed out from the mold 36, and is moderately adjusted. A so-called mouth opening phenomenon easily occurs.
【０００６】そして、図４にも示したように、バンパー
サイド部３３ａの端末部のバンパー側取付面３４を車体
側に突き合わせてバンパーフェイシア３３をフロントフ
ェンダー３１に固定する際には、バンパーサイド部３３
ａの先の口開き量を復元させなければならず、それによ
ってバンパーフェイシア１の上面部に歪みが生じやす
く、品質の向上に限界がある。As shown in FIG. 4, when the bumper fascia 33 is fixed to the front fender 31 by abutting the bumper-side mounting surface 34 of the terminal portion of the bumper side portion 33a against the vehicle body, the bumper side portion 33
It is necessary to restore the opening amount at the end of “a”, so that the upper surface of the bumper fascia 1 tends to be distorted, and there is a limit in improving the quality.
【０００７】本発明は以上のような課題に着目してなさ
れたもので、その目的とするところは、バンパーサイド
部およびその端末部のバンパー側取付面の強度もしくは
剛性を向上させて、部品点数と組付工数の削減を図りな
がら無用な変形を防止することができるバンパーフェイ
シアの構造を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to improve the strength or rigidity of a bumper side portion and a bumper side mounting surface of a terminal portion thereof to reduce the number of parts. Another object of the present invention is to provide a bumper fascia structure that can prevent unnecessary deformation while reducing the number of assembly steps.
【０００８】[0008]
【課題を解決するための手段】本発明は、自動車用バン
パーの樹脂製のバンパーフェイシアのうちそのバンパー
サイド部の端末部に、車体前後方向で車体側取付面と正
対するバンパー側取付面を形成し、これら車体側取付面
とバンパー側取付面とを突き合わせた上で両者を締結結
合してバンパーフェイシアを車体に固定するようにした
構造において、前記バンパー側取付面の裏面側に複数条
に分岐したリブを突出形成するとともに、これら複数条
のリブの内部には、該複数条のリブからバンパーサイド
部の上縁部の厚肉部のほぼ全長域に沿って連続する中空
部を形成したことを特徴としている。SUMMARY OF THE INVENTION According to the present invention, a bumper-side mounting surface facing a vehicle-side mounting surface in a vehicle longitudinal direction is formed at a terminal portion of a bumper side portion of a resin bumper fascia of an automobile bumper. Then, in a structure in which the body-side mounting surface and the bumper-side mounting surface are abutted and fastened and connected to each other to fix the bumper fascia to the vehicle body, a plurality of branches are formed on the back side of the bumper-side mounting surface. A plurality of ribs protrudingly formed, and a hollow portion continuous from the plurality of ribs along the substantially entire length of the thick portion at the upper edge of the bumper side portion is formed inside the plurality of ribs. It is characterized by.
【０００９】[0009]
【作用】この構造によると、バンパー側取付面の裏面側
に複数条のリブを形成したことにより該バンパー側取付
面が補強されて充分な剛性もしくは強度をもつようにな
り、車体側取付面とバンパー側取付面とを突き合わせて
バンパーフェイシアを固定する際に従来のようにリテー
ナを介装する必要がなくなる。According to this structure, by forming a plurality of ribs on the back side of the bumper-side mounting surface, the bumper-side mounting surface is reinforced and has sufficient rigidity or strength. When the bumper fascia is fixed by abutting against the mounting surface on the bumper side, it is not necessary to interpose a retainer as in the related art.
【００１０】その上、バンパーサイド部の上縁部にはリ
ブと同様に中空部をもつ厚肉部が形成されていることか
ら、バンパーサイド部自体も充分な剛性を有することと
なって、特にバンパーフェイシアの成形過程での変形を
防止できるようになる。In addition, since a thick portion having a hollow portion is formed at the upper edge portion of the bumper side portion similarly to the rib, the bumper side portion itself has sufficient rigidity. Deformation during the molding process of the bumper fascia can be prevented.
【００１１】[0011]
【実施例】図１，２は本発明の一実施例を示す図で、バ
ンパーフェイシア１のバンパーサイド部１ａの端末部に
は、図４に示した車体側取付面３２と正対するバンパー
側取付面２が形成されていて、このバンパー側取付面２
には複数の取付穴３が貫通形成されている。前記バンパ
ー側取付面２の裏面側には各取付穴３を取り囲むように
複数条の補助リブ４が突出形成されているとともに、こ
れら複数条の補助リブ４を相互に接続する一本の連続し
た主リブ５が突出形成されていて、この主リブ５は、バ
ンパーサイド部１ａの上縁部のほぼ全長に沿って形成さ
れた厚肉部６に連続している。1 and 2 show an embodiment of the present invention. A bumper side mounting surface 32 shown in FIG. Surface 2 is formed, and the bumper side mounting surface 2
Has a plurality of mounting holes 3 formed therethrough. A plurality of auxiliary ribs 4 project from the rear surface of the bumper-side mounting surface 2 so as to surround each mounting hole 3, and one continuous rib connecting the plurality of auxiliary ribs 4 to each other. A main rib 5 is formed so as to protrude, and the main rib 5 is continuous with a thick portion 6 formed substantially along the entire length of the upper edge portion of the bumper side portion 1a.
【００１２】そして、前記補助リブ４と主リブ５および
厚肉部６の内部には、それぞれに相互に連通する中空部
７，８，９が形成されている。Inside the auxiliary ribs 4, the main ribs 5 and the thick portions 6, hollow portions 7, 8, 9 are formed which communicate with each other.
【００１３】このような構造のバンパーフェイシア１を
成形するにあたっては、図３に示すような金型構造を用
いて射出成形法によって行う。すなわち、固定型（キャ
ビティブロック）１１と可動型（コアブロック）１２と
で形成される金型１０のキャビティＲに対して、スプル
ー部１３から導入された樹脂材料をランナ１４とファン
ゲート１５を通して充填する。なお、キャビティＲに対
する樹脂材料の充填進行度合が各部で均等になるように
するために、前記ファンゲート１５はバンパーフェイシ
ア１の上面部の長手方向中央部に設定される。The molding of the bumper fascia 1 having such a structure is performed by an injection molding method using a mold structure as shown in FIG. That is, the resin material introduced from the sprue portion 13 is filled into the cavity R of the mold 10 formed by the fixed mold (cavity block) 11 and the movable mold (core block) 12 through the runner 14 and the fan gate 15. I do. The fan gate 15 is set at the center of the upper surface of the bumper fascia 1 in the longitudinal direction so that the degree of filling of the cavity R with the resin material is uniform at each portion.
【００１４】この射出成形の際に、ガスインジェクショ
ン法を併用し、図１の（Ａ）に示すように、可動型１２
内に予め設けたガスノズル１６からバンパー側取付面２
の補助リブ４に相当する部分に窒素ガス等の不活性ガス
を導入する。At the time of this injection molding, a gas injection method is also used, and as shown in FIG.
From the gas nozzle 16 provided in advance to the bumper side mounting surface 2
An inert gas such as a nitrogen gas is introduced into a portion corresponding to the auxiliary rib 4.
【００１５】そして、この不活性ガスの導入開始タイミ
ングを例えば樹脂材料の射出完了直後に設定すると、相
対的に薄肉の一般部はもちろんのこと、補助リブ４や主
リブ５あるいは厚肉部６の表層部では固化が進行してい
るのに対して、補助リブ４や主リブ５ならびに厚肉部６
の中心部では相対的に固化が遅れていることから、前記
補助リブ４に導入された不活性ガスは、粘度が低く且つ
流動抵抗の小さい各補助リブ４および主リブ５の中心部
をいわゆるガスチャンネルとして通過した上で、最終的
には厚肉部６に入って該厚肉部６の長手方向に沿って進
行する。When the timing of starting the introduction of the inert gas is set, for example, immediately after the completion of the injection of the resin material, not only the relatively thin general portions but also the auxiliary ribs 4, the main ribs 5, or the thick portions 6 are formed. While the solidification is progressing in the surface layer, the auxiliary ribs 4, the main ribs 5, and the thick portions 6
Since the solidification is relatively delayed at the center of the auxiliary ribs 4, the inert gas introduced into the auxiliary ribs 4 causes the center of each of the auxiliary ribs 4 and the main ribs 5 having a low viscosity and a small flow resistance to be a so-called gas. After passing through the channel, it finally enters the thick part 6 and proceeds along the longitudinal direction of the thick part 6.
【００１６】その結果、前記不活性ガスは、樹脂材料が
製品肉部の隅々まで届くようにその樹脂材料の流動を助
けると同時に、不活性ガスの通路がそのまま製品部領域
に残存することによって、各補助リブ４や主リブ５およ
び厚肉部６にはそれぞれに中空部７，８，９が形成され
ることになる。As a result, the inert gas assists the flow of the resin material so that the resin material reaches every corner of the product meat portion, and at the same time, the passage of the inert gas remains in the product portion region as it is. In addition, hollow portions 7, 8, and 9 are formed in each of the auxiliary ribs 4, the main ribs 5, and the thick portions 6.
【００１７】なお、前記不活性ガスの圧力、導入開始タ
イミングおよび導入時間等の諸条件は、金型１０の型締
め圧力や、バンパーフェイシア１自体の大きさ、ならび
に各リブ４，５の断面積や長さ等に応じて適宜決定され
る。The conditions such as the pressure of the inert gas, the introduction start timing and the introduction time are determined by the mold clamping pressure of the mold 10, the size of the bumper fascia 1 itself, and the cross-sectional area of each of the ribs 4 and 5. It is appropriately determined according to the length and the length.
【００１８】したがって、上記のバンパーフェイシア１
によれば、中空部７，８をもつ補助リブ４および主リブ
５によってバンパー側取付面２が補強されて、その剛性
もしくは強度が大幅に向上することから、従来のように
リテーナを介装することなしに車体側取付面３２（図
４）とバンパー側取付面２とを直接突き合わせてバンパ
ーフェイシア１を固定することができるようになる。Therefore, the above bumper fascia 1
According to this, the bumper side mounting surface 2 is reinforced by the auxiliary ribs 4 and the main ribs 5 having the hollow portions 7 and 8, and the rigidity or strength thereof is greatly improved. Without this, the bumper fascia 1 can be fixed by directly abutting the vehicle-body-side mounting surface 32 (FIG. 4) and the bumper-side mounting surface 2.
【００１９】その上、前記バンパーサイド部１ａの上縁
部についても、前記補助リブ４および主リブ５に連続す
るようにして中空部９をもつ厚肉部６がそのほぼ全長に
わたって形成されていることから、バンパーサイド部１
ａ自体も充分な剛性をもつようになる。その結果、射出
成形後に金型１０からバンパーフェイシア１を抜き取る
際に従来のようないわゆる口開き現象が生ずることがな
くなり、バンパーフェイシア１を車体に組み付けた時に
歪み等が発生することもなくなる。In addition, a thick portion 6 having a hollow portion 9 is formed over substantially the entire length of the upper edge portion of the bumper side portion 1a so as to be continuous with the auxiliary rib 4 and the main rib 5. Therefore, bumper side part 1
a itself has sufficient rigidity. As a result, when the bumper fascia 1 is removed from the mold 10 after the injection molding, a so-called opening phenomenon as in the related art does not occur, and no distortion or the like occurs when the bumper fascia 1 is assembled to the vehicle body.
【００２０】ここで、前記実施例では、補助リブ４に相
当する部分からガスノズル１６を用いて不活性ガスを導
入するようにしているが、主リブ５あるいは厚肉部６に
相当する部分から不活性ガスを導入するようにしてもよ
い。In the above embodiment, the inert gas is introduced from the portion corresponding to the auxiliary rib 4 using the gas nozzle 16, but the inert gas is introduced from the portion corresponding to the main rib 5 or the thick portion 6. An active gas may be introduced.
【００２１】[0021]
【発明の効果】以上のように本発明によれば、バンパー
フェイシアのバンパーサイド部の端末部に、車体前後方
向で車体側取付面と正対するバンパー側取付面を備えた
ものにおいて、前記バンパー側取付面の裏面側に複数条
に分岐したリブを突出形成するとともに、これら複数条
のリブの内部には、該複数条のリブからバンパーサイド
部の上縁部の厚肉部のほぼ全長域に沿って連続する中空
部を形成したものである。As described above, according to the present invention, the terminal portion of the bumper side portion of the bumper fascia is provided with the bumper side mounting surface facing the vehicle side mounting surface in the vehicle longitudinal direction. A plurality of ribs protrudingly formed on the back surface side of the mounting surface, and the inside of the plurality of ribs extends from the plurality of ribs to the almost entire length of the thick portion of the upper edge portion of the bumper side portion. A hollow portion is formed along the hole.
【００２２】したがって、バンパー側取付面がリブで補
強されることによって該バンパー側取付面が充分な剛性
と強度をもつようになり、バンパー側取付面と車体側取
付面とを直接突き合わせて組み付けることができること
から、従来は必須とされたリテーナを廃止することがで
きるようになって、部品点数と組付工数を削減できる。Therefore, since the bumper-side mounting surface is reinforced with the ribs, the bumper-side mounting surface has sufficient rigidity and strength, and the bumper-side mounting surface and the vehicle-body-side mounting surface are directly butted and assembled. Therefore, the retainer, which is conventionally required, can be eliminated, and the number of parts and the number of assembling steps can be reduced.
【００２３】また、バンパーサイド部の上縁部まで中空
部をもつ厚肉部が形成されていることから、バンパーサ
イド部の剛性も併せて向上し、特にバンパーフェイシア
を射出成形して金型から抜き取る際にいわゆる口開き現
象と称される変形が生ずることがなく、バンパーフェイ
シアを車体に組み付けた際の歪みの発生を未然に防止で
きるほか、前記中空部をガスインジェクション法で形成
することにより、そのガス圧によって樹脂材料の流動性
が助けられて樹脂材料のいわゆる回りが改善されて「ひ
け」等の成形欠陥の発生防止に貢献できる。Further, since a thick portion having a hollow portion is formed up to the upper edge portion of the bumper side portion, the rigidity of the bumper side portion is also improved. When extracting, there is no deformation called so-called opening phenomenon, and it is possible to prevent the occurrence of distortion when the bumper fascia is assembled to the vehicle body, and by forming the hollow portion by a gas injection method, The gas pressure assists the fluidity of the resin material and improves the so-called rotation of the resin material, thereby contributing to the prevention of occurrence of molding defects such as sink marks.
【図１】本発明の一実施例を示す図で、（Ａ）はバンパ
ーフェイシアの要部斜視図、（Ｂ）は同図（Ａ）のｂ−
ｂ線に沿う断面図。1A and 1B are views showing an embodiment of the present invention, wherein FIG. 1A is a perspective view of a main part of a bumper fascia, and FIG.
Sectional drawing which follows the b line.
【図２】図１のバンパーフェイシアを異なる方向から見
た場合の斜視図。FIG. 2 is a perspective view when the bumper fascia of FIG. 1 is viewed from different directions.
【図３】図１のバンパーフェイシアを成形するための金
型の断面図。FIG. 3 is a sectional view of a mold for molding the bumper fascia of FIG. 1;
【図４】バンパーフェイシアと車体との関係を示す要部
分解斜視図。FIG. 4 is an exploded perspective view of a main part showing a relationship between a bumper fascia and a vehicle body.
【図５】従来のバンパーフェイシアとリテーナとの関係
を示す要部分解斜視図。FIG. 5 is an exploded perspective view of a main part showing a conventional relationship between a bumper fascia and a retainer.
【図６】従来のバンパーフェイシアの成形工程の説明
図。FIG. 6 is an explanatory view of a molding process of a conventional bumper fascia.
１…バンパーフェイシア １ａ…バンパーサイド部 ２…バンパー側取付面 ４…補助リブ ５…主リブ ６…厚肉部 ７，８，９…中空部 １６…ガスノズル ３２…車体側取付面 DESCRIPTION OF SYMBOLS 1 ... Bumper fascia 1a ... Bumper side part 2 ... Bumper side mounting surface 4 ... Auxiliary rib 5 ... Main rib 6 ... Thick part 7, 8, 9 ... Hollow part 16 ... Gas nozzle 32 ... Car body side mounting surface
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−82465（ＪＰ，Ａ) 特開 昭60−4443（ＪＰ，Ａ) 実開 昭58−151646（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B60R 19/03 B60R 19/24 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-82465 (JP, A) JP-A-60-4443 (JP, A) Japanese Utility Model Sho-58-151646 (JP, U) (58) Field (Int.Cl. 6 , DB name) B60R 19/03 B60R 19/24
Claims (1)
ェイシアのうちそのバンパーサイド部の端末部に、車体
前後方向で車体側取付面と正対するバンパー側取付面を
形成し、これら車体側取付面とバンパー側取付面とを突
き合わせた上で両者を締結結合してバンパーフェイシア
を車体に固定するようにした構造において、 前記バンパー側取付面の裏面側に複数条に分岐したリブ
を突出形成するとともに、 これら複数条のリブの内部には、該複数条のリブからバ
ンパーサイド部の上縁部の厚肉部のほぼ全長域に沿って
連続する中空部を形成したことを特徴とするバンパーフ
ェイシアの端末部構造。1. A resin bumper fascia of an automobile bumper has a bumper-side mounting surface facing a vehicle-body-side mounting surface in a front-rear direction of a vehicle body at a terminal portion of the bumper-side portion. In a structure in which the bumper fascia is fixed to the vehicle body by abutting the bumper-side mounting surface on the butter and the bumper-side mounting surface, a plurality of ribs protrudingly formed on the back side of the bumper-side mounting surface, A terminal of a bumper fascia characterized in that a hollow portion which is continuous from the plurality of ribs along a substantially entire length of a thick portion of an upper edge portion of a bumper side portion is formed from the plurality of ribs. Part structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5200935A JP2976756B2 (en) | 1993-08-13 | 1993-08-13 | Terminal structure of bumper fascia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5200935A JP2976756B2 (en) | 1993-08-13 | 1993-08-13 | Terminal structure of bumper fascia |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0752733A JPH0752733A (en) | 1995-02-28 |
| JP2976756B2 true JP2976756B2 (en) | 1999-11-10 |
Family
ID=16432745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5200935A Expired - Lifetime JP2976756B2 (en) | 1993-08-13 | 1993-08-13 | Terminal structure of bumper fascia |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2976756B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19546478A1 (en) * | 1995-12-13 | 1997-06-19 | Dynamit Nobel Ag | Plastic bumper covers for motor vehicles |
| KR100350268B1 (en) * | 2000-03-30 | 2002-08-28 | 기아자동차주식회사 | Reinforced structure of side bumper in automobile |
| JP3445971B2 (en) | 2000-12-14 | 2003-09-16 | 富士通株式会社 | Surface acoustic wave device |
| JP5861273B2 (en) | 2011-05-20 | 2016-02-16 | スズキ株式会社 | Bumper for vehicle |
| JP5614383B2 (en) | 2011-07-12 | 2014-10-29 | トヨタ車体株式会社 | Mold |
-
1993
- 1993-08-13 JP JP5200935A patent/JP2976756B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0752733A (en) | 1995-02-28 |
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