JPH0597008A - Joining structure of bumper reinforcement - Google Patents
Joining structure of bumper reinforcementInfo
- Publication number
- JPH0597008A JPH0597008A JP26160691A JP26160691A JPH0597008A JP H0597008 A JPH0597008 A JP H0597008A JP 26160691 A JP26160691 A JP 26160691A JP 26160691 A JP26160691 A JP 26160691A JP H0597008 A JPH0597008 A JP H0597008A
- Authority
- JP
- Japan
- Prior art keywords
- members
- resin
- bumper reinforcement
- joint
- joining
- 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.)
- Granted
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば金型スライド成
形方法等により閉断面を形成するように二部材を相互に
接合してなるバンパーレインフォースメントの接合構造
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bumper reinforcement joint structure in which two members are joined to each other so as to form a closed cross section by, for example, a die slide molding method.
【０００２】[0002]
【従来の技術】従来より、例えば特開平２−２６７０４
７号公報に開示されているようなバンパーが車両に組付
けられている。そのバンパーは、図９に示すように、表
皮部材５１と、強度部材であるバンパーレインフォース
メント５２との間に、発泡材５３を介在させて構成され
ている。上記バンパーレインフォースメント５２は、車
両本体から延びるステー５４に取付けられるインナー部
材５５と、これに周縁が接合された断面コ字状のアウタ
ー部材５６とで閉断面状に形成されている。2. Description of the Related Art Conventionally, for example, JP-A-2-26704.
A bumper as disclosed in Japanese Patent No. 7 is mounted on a vehicle. As shown in FIG. 9, the bumper is configured by interposing a foam material 53 between a skin member 51 and a bumper reinforcement 52 which is a strength member. The bumper reinforcement 52 is formed in a closed cross section by an inner member 55 attached to a stay 54 extending from the vehicle body, and an outer member 56 having a U-shaped cross section whose peripheral edge is joined to the inner member 55.
【０００３】上記のバンパーレインフォースメント５２
は硬質の合成樹脂から成り、インナー部材５５とアウタ
ー部材５６とをそれぞれ作製した後、周縁を接着すると
いう工程を経て作製されるが、この場合には、インナー
部材５５用とアウター部材５６用との個別の製造装置が
必要となり、さらに、接合装置への搬送操作等も必要と
なって、充分な生産性は得られない。The above bumper reinforcement 52
Is made of a hard synthetic resin, and is manufactured through the steps of manufacturing the inner member 55 and the outer member 56 and then bonding the peripheral edges. In this case, the inner member 55 and the outer member 56 are manufactured. In addition, a separate manufacturing apparatus is required, and further, a transfer operation to the joining apparatus is required, and sufficient productivity cannot be obtained.
【０００４】一方、上記のような閉断面形状の合成樹脂
製品の生産性を向上し得る製造法として、例えば特公平
２−３８３７７号公報に、金型スライド成形方法（ダイ
・スライド・インジェクション法、以下、ＤＳＩ法とい
う）が提案されている。その製造装置には、図１０に示
すように、固定型６１と、シリンダ６２により上下動さ
れるスライド型６３と、このスライド型６３に対して接
離方向に移動される可動型６４とが設けられている。ス
ライド型６３には、固定型６１に形成されている主スプ
ルー６５に連通する一次射出用スプルー６６が形成さ
れ、スライド型６３と可動型６４との合わせ面における
一次射出用スプルー６６を挟んで上下の位置に、最終成
形体を二分割した形状にそれぞれ対応するキャビティ６
７・６８が設けられている。また、スライド型６３にお
ける下部側に接合用スプルー６９が設けられている。On the other hand, as a manufacturing method capable of improving the productivity of a synthetic resin product having a closed cross-sectional shape as described above, for example, Japanese Patent Publication No. 2-38377 discloses a die slide molding method (die slide injection method, Hereinafter, the DSI method) has been proposed. As shown in FIG. 10, the manufacturing apparatus is provided with a fixed die 61, a slide die 63 that is moved up and down by a cylinder 62, and a movable die 64 that is moved toward and away from the slide die 63. Has been. The slide die 63 is formed with a primary injection sprue 66 communicating with the main sprue 65 formed on the fixed die 61. The primary injection sprue 66 on the mating surface of the slide die 63 and the movable die 64 is vertically sandwiched therebetween. At the position of the cavity 6 corresponding to the shape obtained by dividing the final molded body in two.
7.68 are provided. Further, a sprue 69 for joining is provided on the lower side of the slide die 63.
【０００５】そして、図１０に示す一次射出型締め状態
で、射出成形機から主スプルー６５へと溶融状態の樹脂
が注入されると、この樹脂は、図１１に示すように、一
次射出用スプルー６６から、ランナー７０・ゲート７１
・７１を経て、両キャビティ６７・６８に同時に充填さ
れる。この樹脂が固化することによって、両キャビティ
６７・６８内で分割形状の半製品７２・７２が形成され
る。When the molten resin is injected from the injection molding machine into the main sprue 65 in the primary injection mold clamped state shown in FIG. 10, the resin is injected into the primary injection sprue as shown in FIG. 66, runner 70, gate 71
・ After 71, both cavities 67 and 68 are simultaneously filled. When this resin is solidified, split semi-finished products 72, 72 are formed in both cavities 67, 68.
【０００６】その後、図１２に示すように、可動型６４
をスライド型６３から離間させる型開きが行われると共
に、一次射出用スプルー６６内等で固化した樹脂７３が
除去される。次いで、図１３（ａ）に示すように、スラ
イド型６３を上方にスライドした後、可動型６４を移動
して型締めされる。このとき、両半製品７２・７２が相
互に衝合状態になると共に、主スプルー６５には前記接
合用スプルー６９が連通する。そして、この二次射出型
締め状態において、半製品７２・７２の衝合面の外周側
に、例えば矩形断面の接合樹脂充填空間７４が全周にわ
たって形成されるように、前記キャビティ６７・６８の
形状が設定されている。したがって、その後、図１３
（ｂ）に示すように、再度主スプルー６５を通して溶融
樹脂を注入すると、この樹脂は、接合用スプルー６９お
よびランナー７０を通して上記接合樹脂充填空間７４に
充填される。この結果、図１４に示すように、両半製品
７２・７２が、上記接合樹脂充填空間７４内で固化した
接合樹脂７５によって、相互に溶着されて閉断面構造の
樹脂成形品が得られる。After that, as shown in FIG.
Is opened from the slide mold 63, and the resin 73 solidified in the primary injection sprue 66 is removed. Next, as shown in FIG. 13A, after sliding the slide die 63 upward, the movable die 64 is moved and the die is clamped. At this time, the two semi-finished products 72, 72 are in an abutting state with each other, and the sprue 69 for joining is communicated with the main sprue 65. Then, in this secondary injection mold clamping state, for example, the bonding resin filling space 74 having a rectangular cross section is formed over the entire circumference on the outer peripheral side of the abutting surfaces of the semi-finished products 72, 72 so that the cavities 67, 68 are formed. The shape is set. Therefore, after that, in FIG.
As shown in (b), when the molten resin is injected again through the main sprue 65, the resin is filled in the joining resin filling space 74 through the joining sprue 69 and the runner 70. As a result, as shown in FIG. 14, the two semi-finished products 72, 72 are welded to each other by the bonding resin 75 solidified in the bonding resin filling space 74 to obtain a resin molded product having a closed cross-section structure.
【０００７】上記のようなＤＳＩ法による製造方法は、
一次射出成形時のキャビティ６７・６８を前記インナー
部材５５とアウター部材５６とに対応する形状とし、ま
た、インナー部材５５とアウター部材５６との衝合面の
外周側に、例えば前記した矩形断面形状の接合樹脂充填
空間７４が形成される成形金型を設けることにより、バ
ンパーレインフォースメント５２の製造にも適用するこ
とが可能であり、これによって、効率の高い生産を行う
ことができる。The manufacturing method by the DSI method as described above is
The cavities 67 and 68 at the time of primary injection molding have a shape corresponding to the inner member 55 and the outer member 56, and are formed on the outer peripheral side of the abutting surface of the inner member 55 and the outer member 56, for example, the rectangular cross-sectional shape By providing the molding die in which the bonding resin filling space 74 is formed, it is possible to apply to the manufacturing of the bumper reinforcement 52 as well, which enables highly efficient production.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上記の
ようなＤＳＩ法によりバンパーレインフォースメント５
２を作製する場合、二次射出時に上記の接合樹脂充填空
間７４に充填される接合樹脂が、一次射出で成形される
インナー部材５５およびアウター部材５６と同一材料で
あるとしても、この接合樹脂が各部材５５・５６に溶着
する領域は幾分変質した組織構造となって、その強度は
樹脂本来の強度よりも幾分かの低下を生じる。このた
め、二部材５５・５６の衝合面に接合樹脂を充填するた
めの空隙を単に設け、この空隙に充填された接合樹脂と
二部材との溶着強度のみに衝合面の接合強度が依存する
ような上記の構造では、バンパーレインフォースメント
としての充分な接合強度は得難いという問題を生じる。However, the bumper reinforcement 5 by the DSI method as described above is used.
2 is manufactured, even if the bonding resin filled in the bonding resin filling space 74 at the time of the secondary injection is the same material as the inner member 55 and the outer member 56 molded by the primary injection, this bonding resin is The region welded to each member 55/56 has a slightly altered texture structure, and its strength is somewhat reduced from the original strength of the resin. Therefore, a gap for filling the joining resin is simply provided on the abutting surfaces of the two members 55 and 56, and the joining strength of the abutting surface depends only on the welding strength between the joining resin filled in the void and the two members. The above-described structure causes a problem that it is difficult to obtain sufficient bonding strength as bumper reinforcement.
【０００９】本発明は、上記の問題点に鑑みなされたも
のであって、その目的は、二部材の衝合面における空隙
に接合樹脂を充填して相互に接合する際の接合強度を向
上し得るバンパーレインフォースメントの接合構造を提
供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to improve the bonding strength when the space between the abutting surfaces of the two members is filled with the bonding resin and they are bonded to each other. It is to provide a joint structure of the bumper reinforcement to be obtained.
【００１０】[0010]
【課題を解決するための手段】本発明のバンパーレイン
フォースメントの接合構造は、上記の目的を達成するた
めに、閉断面を形成するように二部材を互いに衝合し接
合することによって形成されるバンパーレインフォース
メントの接合構造において、両部材の衝合領域に、互い
に向き合う略コ字状断面の接合部がそれぞれ形成され、
両接合部を咬合させると共にこの咬合状態で形成される
両接合部間の空隙に接合樹脂が充填されて、両部材が相
互に接合されていることを特徴としている。In order to achieve the above-mentioned object, the bumper reinforcement joining structure of the present invention is formed by abutting and joining two members so as to form a closed cross section. In the bumper reinforcement joint structure, a joint portion having a substantially U-shaped cross section facing each other is formed in the abutting region of both members,
It is characterized in that both joints are occluded and a space between the joints formed in this occlusal state is filled with a joint resin so that both members are joined to each other.
【００１１】[0011]
【作用】上記の構成によれば、二部材の各接合部が互い
に咬合した状態となっているので、両接合部間の空隙に
充填された接合樹脂と各部材との接合強度に加えて、二
部材の機械的な咬合構造によっても、外力に対する二部
材間の相対的な変形が抑制され、これによって、両部材
間の接合強度が向上する。According to the above construction, since the joints of the two members are in a state of being engaged with each other, in addition to the joint strength between the joint resin filled in the void between the joints and the respective members, The mechanical interlocking structure of the two members also suppresses the relative deformation between the two members against an external force, thereby improving the joint strength between the two members.
【００１２】[0012]
【実施例】本発明の一実施例について図１ないし図６に
基づいて説明すれば、以下の通りである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS.
【００１３】図２に示すように、本実施例に係るバンパ
ーレインフォースメント１は、車両の前後方向（図にお
いて左右方向）に相対向して相互に接合されたアウター
部材２とインナー部材３とから構成されている。これら
両部材２・３は、それぞれ硬質の合成樹脂から成ってい
る。車体側（図において右側）に位置するインナー部材
３は略平板状に形成され、車体から延びるステー（図示
せず）にほぼ垂直な取付状態で固定されている。アウタ
ー部材２は、その外周断面形状が略コ字状に形成され、
上部と下部との車体側に延びる水平外壁面２ａ・２ｂの
各先端部がインナー部材３の上下端にそれぞれ接合され
ている。このように、閉断面形状をなすようにアウター
部材２とインナー部材３とを相互に接合することにより
構成されたバンパーレインフォースメント１の前面側
に、発泡樹脂等より成る衝撃吸収部材４を介して、比較
的軟質の合成樹脂より成る表皮部材５を被着することで
バンパー６が構成されている。As shown in FIG. 2, a bumper reinforcement 1 according to this embodiment includes an outer member 2 and an inner member 3 which are joined to each other so as to face each other in the front-rear direction of the vehicle (left-right direction in the drawing). It consists of Both of these members 2 and 3 are made of hard synthetic resin. The inner member 3 located on the vehicle body side (right side in the drawing) is formed in a substantially flat plate shape, and is fixed to a stay (not shown) extending from the vehicle body in a substantially vertical mounting state. The outer member 2 has a substantially U-shaped outer peripheral cross-section,
The front ends of the horizontal outer wall surfaces 2a and 2b extending toward the vehicle body, that is, the upper portion and the lower portion, are joined to the upper and lower ends of the inner member 3, respectively. In this way, the impact absorbing member 4 made of foamed resin or the like is interposed on the front side of the bumper reinforcement 1 constituted by joining the outer member 2 and the inner member 3 to each other so as to form a closed cross-sectional shape. Then, the bumper 6 is formed by applying the skin member 5 made of a relatively soft synthetic resin.
【００１４】上記バンパーレインフォースメント１の内
部には、それぞれ平板状の水平リブ７・７と垂直リブ８
…とがアウター部材２に設けられている。水平リブ７・
７は、内部空間を高さ方向にほぼ３等分する位置で、図
４に示すように、ほぼ全幅にわたって設けられ、図２の
ように、アウター部材２における垂直な外壁面２ｃか
ら、インナー部材３の内面近傍に達する形状で設けられ
ている。Inside the bumper reinforcement 1, flat horizontal ribs 7 and vertical ribs 8 are respectively formed.
Are provided on the outer member 2. Horizontal rib 7
Reference numeral 7 denotes a position that divides the internal space into approximately three equal parts in the height direction, and is provided over almost the entire width as shown in FIG. 4, and as shown in FIG. 2, from the vertical outer wall surface 2c of the outer member 2 to the inner member. 3 is provided in a shape reaching the vicinity of the inner surface.
【００１５】インナー部材３の内面には、上記水平リブ
７・７に対応する高さ位置に、凹入溝を有する振れ抑止
部９・９がそれぞれ形成され、これら振れ抑止部９・９
における各凹入溝に、上記水平リブ７・７の各先端部が
嵌入し、これにより、水平リブ７・７の各先端部側の振
れが規制されている。この結果、衝突時におけるバンパ
ーレインフォースメント１の前後方向の変形に対して
も、上記水平リブ７の先端側が衝突方向から逃げて傾斜
変形するということがなく、衝突方向の荷重を最も効果
的に吸収する状態が維持されようになっている。On the inner surface of the inner member 3, there are formed shake restraining portions 9 and 9 each having a recessed groove at a height position corresponding to the horizontal ribs 7 and 7. These shake restraining portions 9 and 9 are formed.
The front end portions of the horizontal ribs 7 and 7 are fitted into the respective recessed grooves in the above, whereby the deflection of the horizontal ribs 7 and 7 on the front end portion side is regulated. As a result, even when the bumper reinforcement 1 is deformed in the front-rear direction at the time of a collision, the tip end side of the horizontal rib 7 does not escape from the collision direction and is obliquely deformed, so that the load in the collision direction is most effective. The state of absorption is being maintained.
【００１６】前記垂直リブ８…は、図３に示すように、
幅方向に適度の間隔を置いて複数設けられ、図２に示す
ように、アウター部材２における垂直外壁面２ｃからイ
ンナー部材３に向かう中途位置までの範囲内で、アウタ
ー部材２の上下水平外壁面２ａ・２ｂおよび水平リブ７
・７間にわたって設けられている。As shown in FIG. 3, the vertical ribs 8 ...
A plurality of them are provided at appropriate intervals in the width direction, and as shown in FIG. 2, within the range from the vertical outer wall surface 2c of the outer member 2 to the middle position toward the inner member 3, the upper and lower horizontal outer wall surfaces of the outer member 2 are provided. 2a and 2b and horizontal rib 7
・ Provided over 7 spaces.
【００１７】一方、アウター部材２における車体側に延
びる水平外壁面２ａ・２ｂの各先端部と、これに接合さ
れているインナー部材３の上下端には、図１に示すよう
に、前後方向に互いに向き合う断面コ字状のアウター側
接合部１１・インナー側接合部１２がそれぞれ設けられ
ている。アウター側接合部１１は、互いに平行な外側突
片１１ａと内側突片１１ｂとの二股形状となされて、こ
れら突片１１ａ・１１ｂ間にアウター側凹入溝１１ｃが
形成されている。また、インナー側接合部１２には、上
記突片１１ａ・１１ｂと平行に、外側突片１２ａと内側
突片１２ｂとが突設され、これら突片１２ａ・１２ｂ間
にインナー側凹入溝１２ｃが形成されている。On the other hand, the front and rear ends of the horizontal outer wall surfaces 2a and 2b of the outer member 2 extending toward the vehicle body and the upper and lower ends of the inner member 3 joined to the horizontal outer wall surfaces 2a and 2b are, as shown in FIG. An outer joint portion 11 and an inner joint portion 12 having U-shaped cross sections facing each other are provided. The outer joint portion 11 has a bifurcated shape of an outer protruding piece 11a and an inner protruding piece 11b that are parallel to each other, and an outer recessed groove 11c is formed between these protruding pieces 11a and 11b. Further, the inner side joint portion 12 is provided with an outer side protruding piece 12a and an inner side protruding piece 12b protruding in parallel to the protruding pieces 11a and 11b, and an inner side recessed groove 12c is formed between these protruding pieces 12a and 12b. Has been formed.
【００１８】上記のような接合部１１・１２を各々有す
るアウター部材２とインナー部材３とは、アウター側接
合部１１の内側突片１１ｂがインナー側凹入溝１２ｃに
嵌入すると共に、インナー側接合部１２の外側突片１２
ａがアウター側凹入溝１１ｃ内に位置した咬合状態で互
いに組付けられている。そして、アウター側凹入溝１１
ｃ内には、この内部に位置するインナー側接合部１２の
外側突片１２ａとアウター側接合部１１の外側突片１１
ａとの間に、接合樹脂充填空間（空隙）１３が生じるよ
うになっており、この接合樹脂充填空間１３に、後述す
るように、溶融樹脂を注入し、これを固化させることに
よって、上記接合部１１・１２が相互に接合されてい
る。The outer member 2 and the inner member 3 each having the above-mentioned joining portions 11 and 12 are joined to each other while the inner projecting piece 11b of the outer joining portion 11 is fitted in the inner recess groove 12c. Outer protrusion 12 of part 12
a is located in the outer side recessed groove 11c and is assembled with each other in an occlusal state. Then, the outer side recessed groove 11
In c, the outer protruding piece 12a of the inner side joint 12 and the outer protruding piece 11 of the outer side joint 11 located inside this
A joining resin filling space (void) 13 is formed between the joining resin and a, and a molten resin is injected into the joining resin filling space 13 and solidified as described below, whereby the above joining is performed. The parts 11 and 12 are joined to each other.
【００１９】上記構造のバンパーレインフォースメント
１は、前述したＤＳＩ法によって製造される。この場
合、図５に示すように、固定型２１と、この固定型２１
に対して接離方向（図において左右方向）に移動自在な
可動型２２との間に、上下動されるスライド型２３が前
記同様に設けられる。スライド型２３のほぼ中央部に
は、このスライド型２３が図のようにスライド前の一次
射出時の状態において、固定型２１に形成されている主
スプルー２４に連通する一次射出用スプルー２５が形成
されている。そして、スライド型２３における可動型２
２との合わせ面には、一次射出用スプルー２５の上側
に、前記アウター部材２内における水平リブ７・７およ
び垂直リブ８…間の空間形状に対応する雄型部２６が設
けられている。The bumper reinforcement 1 having the above structure is manufactured by the above-mentioned DSI method. In this case, as shown in FIG.
A slide die 23 that is vertically moved is provided between the movable die 22 and the movable die 22 that is movable in the contacting / separating direction (the horizontal direction in the drawing). A primary injection sprue 25, which communicates with the main sprue 24 formed on the fixed mold 21 when the slide mold 23 is in the primary injection state before sliding as shown in the figure, is formed at approximately the center of the slide mold 23. Has been done. The movable die 2 in the slide die 23
A male part 26 corresponding to the space shape between the horizontal ribs 7 and the vertical ribs 8 in the outer member 2 is provided on the upper surface of the primary injection sprue 25 on the mating surface with 2.
【００２０】一方、可動型２２には、上記雄型部２６を
囲う凹部形状の雌型部２７が設けられ、この雌型部２７
と上記雄型部２６との間に、前記アウター部材２に対応
する空間形状のアウター部材用キャビティー２８が形成
されている。また、一次射出用スプルー２５の下側にお
けるスライド型２３と可動型２２との合わせ面に沿っ
て、前記インナー部材３に対応する空間形状のインナー
部材用キャビティー２９が形成され、さらに、スライド
型２３には、上記インナー部材用キャビティー２９より
も下側の部位に接合用スプルー３０が設けられている。On the other hand, the movable die 22 is provided with a concave female die portion 27 surrounding the male die portion 26.
A space-shaped outer member cavity 28 corresponding to the outer member 2 is formed between the outer mold member 26 and the male mold portion 26. In addition, a space-shaped inner member cavity 29 corresponding to the inner member 3 is formed along the mating surface of the slide mold 23 and the movable mold 22 below the primary injection sprue 25. 23, a sprue 30 for joining is provided at a position lower than the cavity 29 for the inner member.
【００２１】上記のような一次射出時の状態で、図示し
ない射出成形機のノズル３１から主スプルー２４へと溶
融状態の樹脂が注入されると、この樹脂は、一次射出用
スプルー２５から、可動型２２とスライド型２３との合
わせ面に沿うランナー３２・このランナー３２の上下に
それぞれ設けられているゲート３３・３４を経て、アウ
ター部材用キャビティー２８とインナー部材用キャビテ
ィー２９とに充填され、固化することによって、それぞ
れ前記アウター部材２とインナー部材３とが同時に成形
される。When the molten resin is injected from the nozzle 31 of the injection molding machine (not shown) into the main sprue 24 in the above-described primary injection state, the resin is moved from the primary injection sprue 25. The outer member cavity 28 and the inner member cavity 29 are filled with the runner 32 along the mating surface of the mold 22 and the slide mold 23 and the gates 33 and 34 provided above and below the runner 32, respectively. By solidifying, the outer member 2 and the inner member 3 are simultaneously molded.
【００２２】次いで、可動型２２をスライド型２３から
離間させる型開きが行われる。このとき、アウター部材
２は可動型２２側に、また、インナー部材３はスライド
型２３側に残るようになっている。なお、一次射出に供
されたスプルー・ランナー・ゲートでの固化樹脂は製品
から切除され、型外に捨てられる。そして、型開きの状
態で、スライド型２３の上昇操作が行われ、その後、可
動型２２をこれがスライド型２３に接する方向に移動し
て型締めされる。Next, mold opening is performed to separate the movable mold 22 from the slide mold 23. At this time, the outer member 2 remains on the movable die 22 side, and the inner member 3 remains on the slide die 23 side. The solidified resin at the sprue runner gate used for the primary injection is cut off from the product and discarded outside the mold. Then, the slide mold 23 is lifted in the mold open state, and then the movable mold 22 is moved in the direction in which the movable mold 22 contacts the slide mold 23 and the mold is clamped.
【００２３】このとき、図６に示すように、アウター部
材２とインナー部材３とのアウター側接合部１１とイン
ナー側接合部１２とが全周にわたって前記した咬合状態
となって重なる一方、固定型２１の主スプルー２４にス
ライド型２３の接合用スプルー３０が連通し、そして、
この接合用スプルー３０の先端に形成されているランナ
ー３５の端部に、上記アウター部材２とインナー部材３
との接合領域における前記接合樹脂充填空間１３が連通
するようになっている。At this time, as shown in FIG. 6, while the outer joint portion 11 and the inner joint portion 12 of the outer member 2 and the inner member 3 are overlapped with each other in the occlusal state described above over the entire circumference, they are fixed. The sprue 30 for joining of the slide mold 23 communicates with the main sprue 24 of 21, and
At the end of the runner 35 formed at the tip of the sprue 30 for joining, the outer member 2 and the inner member 3 are provided.
The joining resin filled space 13 in the joining region with the is communicated with.
【００２４】そこで、再度、主スプルー２４を通して溶
融樹脂を注入する操作が行われ、この結果、上記接合樹
脂充填空間１３に溶融樹脂が充填される。そして、この
溶融樹脂が固化することによって、アウター側接合部１
１とインナー側接合部１２とが全周にわたって相互に接
合され、閉断面形状のバンパーレインフォースメント１
が作製される。Then, the operation of injecting the molten resin through the main sprue 24 is performed again, and as a result, the bonding resin filling space 13 is filled with the molten resin. Then, when the molten resin is solidified, the outer joint portion 1
1 and the inner side joint portion 12 are joined to each other over the entire circumference, and a bumper reinforcement 1 having a closed cross-sectional shape
Is created.
【００２５】以上のように、上記構造のバンパーレイン
フォースメント１は、ＤＳＩ法による射出成形によって
高い生産性を維持して製作される。また、内部には、水
平リブ７・垂直リブ８が設けられ、強度や剛性の高い構
成となっている。As described above, the bumper reinforcement 1 having the above structure is manufactured by injection molding by the DSI method while maintaining high productivity. In addition, horizontal ribs 7 and vertical ribs 8 are provided inside, so that the structure has high strength and rigidity.
【００２６】そして上記の構造では、アウター側接合部
１１とインナー側接合部１２との接合領域において、互
いに向き合う略コ字状断面のアウター側接合部１１とイ
ンナー側接合部１２とが、両部材２・３の接合領域に設
けられ、両接合部１１・１２を咬合させた上で、両接合
部１１・１２間の接合樹脂充填空間１３に接合樹脂が充
填されて、両部材２・３が相互に接合されるようになっ
ている。この場合、外力による変形に対し、上記の咬合
構造によってもこれに抗するように作用するので、前述
した接合樹脂による各部材との接合強度のみに依存して
いた構造に比べ、接合強度も大幅に向上し、特に座屈や
ねじれに対し高い剛性を備えるものとなって、エネルギ
ー吸収性能の大きなバンパーレインフォースメント１と
して作製されている。In the above structure, in the joining region of the outer joint portion 11 and the inner joint portion 12, the outer joint portion 11 and the inner joint portion 12 having substantially U-shaped cross sections facing each other are provided in both members. It is provided in the joint region of 2.3, and after the joint portions 11 and 12 are occluded, the joint resin filling space 13 between the joint portions 11 and 12 is filled with the joint resin so that both members 2.3 are joined. It is designed to be joined together. In this case, since the above-mentioned occlusal structure also acts against this against deformation due to external force, the joint strength is also significantly larger than the above-mentioned structure that depends only on the joint strength with each member by the joint resin. In particular, the bumper reinforcement 1 has a high energy absorption performance and a high rigidity, especially with respect to buckling and twisting.
【００２７】なお、上記接合部１１・１２の咬合構造は
上記実施例に限定されるものではなく、例えば図７に示
すように、アウター側接合部１１よりもインナー側接合
部１２を外側に位置させて構成することも可能である。
また、図のように、インナー側凹入溝１２ｃ内に位置す
るアウター側接合部１１の外側突片１１ａの内外両側
に、それぞれ隙間が生じるように接合樹脂充填空間１３
を形成することにより、この空間１３に充填される接合
樹脂による各部材２・３との溶着面積が広くなり、これ
によって、より接合強度が向上する。The occlusal structure of the joints 11 and 12 is not limited to the above embodiment, and the inner joint 12 is positioned outside the outer joint 11 as shown in FIG. 7, for example. It is also possible to configure it.
Further, as shown in the drawing, the bonding resin filling space 13 is formed so that gaps are formed on both inner and outer sides of the outer projecting piece 11a of the outer joint portion 11 located in the inner recess groove 12c.
By forming the above, the welding area between the members 2 and 3 by the joining resin filled in the space 13 is widened, whereby the joining strength is further improved.
【００２８】また、図８に示すように、例えばインナー
側接合部１２のインナー側凹入溝１２ｃ内に、アウター
側接合部１１全体が嵌入するように構成することも可能
である。この場合、図のようにアウター側凹入溝１１ｃ
が接合樹脂充填空間１３となるように形成され、この空
間１３全体がアウター部材２とインナー部材３とで囲わ
れている。なお、この構造においては、二次射出工程で
の接合樹脂の注入のために、上記接合樹脂充填空間１３
に連通するゲート孔１５をインナー部材３に数カ所設け
る必要があるが、これらのゲート孔１５の表面への開口
部以外は、接合樹脂は表面には出ないものとなる。この
ため、表面に接合ラインが生じないので、美観の向上し
たバンパーレインフォースメントを得ることができる。Further, as shown in FIG. 8, for example, the entire outer joint portion 11 can be fitted in the inner concave groove 12c of the inner joint portion 12. In this case, as shown in the figure, the outer recessed groove 11c
Is formed so as to become the bonding resin filled space 13, and the entire space 13 is surrounded by the outer member 2 and the inner member 3. In addition, in this structure, since the bonding resin is injected in the secondary injection process, the bonding resin filling space 13 is formed.
It is necessary to provide the inner member 3 with several gate holes 15 communicating with the inner hole 3. However, the bonding resin does not appear on the surface except for the openings to the surface of these gate holes 15. For this reason, no joining line is formed on the surface, so that a bumper reinforcement having an improved aesthetic appearance can be obtained.
【００２９】さらに上記実施例においては、ＤＳＩ法に
より製作されるバンパーレインフォースメント１を例に
挙げて説明したが、二部材の衝合個所に接合樹脂を充填
して接合するその他の製造法により作製されるバンパー
レインフォースメントにも本発明を適用することが可能
である。Further, in the above embodiment, the bumper reinforcement 1 manufactured by the DSI method has been described as an example. However, according to another manufacturing method in which the abutting points of the two members are filled with the bonding resin and bonded. The present invention can be applied to the bumper reinforcement produced.
【００３０】[0030]
【発明の効果】本発明のバンパーレインフォースメント
の接合構造は、以上のように、閉断面を形成する二部材
の衝合領域に、互いに向き合う略コ字状断面の接合部が
それぞれ形成され、両接合部を咬合させると共にこの咬
合状態で形成される両接合部間の空隙に接合樹脂が充填
されて、両部材が相互に接合されている構成である。As described above, in the bumper reinforcement joint structure of the present invention, the joint portions having substantially U-shaped cross sections facing each other are formed in the abutting regions of the two members forming the closed cross section. It is configured such that both joints are occluded and a space between the joints formed in this occluded state is filled with a joint resin so that both members are joined to each other.
【００３１】これにより、二部材の各接合部が互いに咬
合した状態となっているので、両接合部間の空隙に充填
された接合樹脂と各部材との接合強度に加えて、二部材
の機械的な咬合構造によっても、外力に対する二部材間
の相対的な変形が抑制され、この結果、両部材間の接合
強度を向上することができるという効果を奏する。As a result, the joints of the two members are in a state of being occluded with each other. Therefore, in addition to the joint strength between the joint resin filled in the space between the joints and the members, the mechanical strength of the two members is increased. The relative occlusal structure also suppresses relative deformation between the two members against external force, and as a result, the joint strength between the two members can be improved.
【図１】本発明の一実施例におけるバンパーレインフォ
ースメントのアウター部材とインナー部材との接合領域
を示す要部断面図である。FIG. 1 is a cross-sectional view of essential parts showing a joint region between an outer member and an inner member of a bumper reinforcement according to an embodiment of the present invention.
【図２】上記バンパーレインフォースメントの縦断面図
である。FIG. 2 is a vertical sectional view of the bumper reinforcement.
【図３】上記バンパーレインフォースメントの平面図で
ある。FIG. 3 is a plan view of the bumper reinforcement.
【図４】上記バンパーレインフォースメントの正面図で
ある。FIG. 4 is a front view of the bumper reinforcement.
【図５】上記バンパーレインフォースメントをＤＳＩ法
により成形するときの成形金型の断面模式図である。FIG. 5 is a schematic cross-sectional view of a molding die when the bumper reinforcement is molded by the DSI method.
【図６】上記ＤＳＩ法による成形過程での二次射出成形
時を示す成形金型の断面模式図である。FIG. 6 is a schematic cross-sectional view of a molding die during secondary injection molding in the molding process by the DSI method.
【図７】本発明の他の実施例におけるバンパーレインフ
ォースメントのアウター部材とインナー部材との接合領
域を示す要部断面図である。FIG. 7 is a cross-sectional view of essential parts showing a joint region between an outer member and an inner member of a bumper reinforcement according to another embodiment of the present invention.
【図８】本発明のさらに他の実施例におけるバンパーレ
インフォースメントのアウター部材とインナー部材との
接合領域を示す要部断面図である。FIG. 8 is a cross-sectional view of essential parts showing a joint region between an outer member and an inner member of a bumper reinforcement according to still another embodiment of the present invention.
【図９】従来のバンパーレインフォースメントを示す断
面図である。FIG. 9 is a cross-sectional view showing a conventional bumper reinforcement.
【図１０】ＤＳＩ法を採用した成形装置の構成を示す断
面模式図である。FIG. 10 is a schematic cross-sectional view showing the configuration of a molding apparatus adopting the DSI method.
【図１１】上記成形装置での一次射出成形工程を示す要
部断面図である。FIG. 11 is a cross-sectional view of essential parts showing a primary injection molding process in the molding apparatus.
【図１２】上記成形装置での一次射出成形後の型開き工
程を示す要部断面図である。FIG. 12 is a main-portion cross-sectional view showing a mold opening step after primary injection molding in the molding apparatus.
【図１３】上記成形装置での成形過程を示すものであっ
て、同図（ａ）は二次射出成形のための型締めを行った
状態を示す要部断面図、同図（ｂ）は二次射出成形工程
を示す要部断面図である。13A and 13B show a molding process in the molding apparatus, wherein FIG. 13A is a cross-sectional view of a main part showing a state where mold clamping for secondary injection molding is performed, and FIG. It is a principal part sectional view which shows a secondary injection molding process.
【図１４】上記成形装置での成形で得られる樹脂製品の
断面図である。FIG. 14 is a cross-sectional view of a resin product obtained by molding with the molding device.
１ バンパーレインフォースメント ２ アウター部材 ３ インナー部材 １１ アウター側接合部 １２ インナー側接合部 １３ 接合樹脂充填空間（空隙） 1 Bumper Reinforcement 2 Outer Member 3 Inner Member 11 Outer Side Joint 12 Inner Side Joint 13 Joint Resin Filling Space (void)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 賀佐見 真司 広島県東広島市八本松町大字原175番地の １ 大協株式会社内 (72)発明者 西田 正三 広島県広島市安芸区船越南１丁目６−７ 株式会社日本製鋼所広島製作所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Shinji Kasami Shinji Kasami, Higashi-Hiroshima City, Hiroshima Prefecture, 175-1 Oohara, Honhonmatsu-cho Daikyo Co., Ltd. (72) Inventor Shozo Nishida 1 Funakoshi-minami, Aki-ku, Hiroshima-shi, Hiroshima Prefecture Chome 6-7 Japan Steel Works Hiroshima Works
Claims (1)
合し接合することによって形成されるバンパーレインフ
ォースメントの接合構造において、 両部材の衝合領域に、互いに向き合う略コ字状断面の接
合部がそれぞれ形成され、両接合部を咬合させると共に
この咬合状態で形成される両接合部間の空隙に接合樹脂
が充填されて、両部材が相互に接合されていることを特
徴とするバンパーレインフォースメントの接合構造。1. In a joint structure of a bumper reinforcement formed by abutting and joining two members so as to form a closed cross section, substantially U-shaped cross sections facing each other in an abutting region of both members. Are joined to each other, and the joint resin is filled in the space between the joints formed in this occlusal state, and both members are joined to each other. Bumper reinforcement joint structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3261606A JP2596660B2 (en) | 1991-10-09 | 1991-10-09 | Joint structure of bumper reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3261606A JP2596660B2 (en) | 1991-10-09 | 1991-10-09 | Joint structure of bumper reinforcement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0597008A true JPH0597008A (en) | 1993-04-20 |
| JP2596660B2 JP2596660B2 (en) | 1997-04-02 |
Family
ID=17364244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3261606A Expired - Fee Related JP2596660B2 (en) | 1991-10-09 | 1991-10-09 | Joint structure of bumper reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2596660B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002067842A (en) * | 2000-08-29 | 2002-03-08 | Aisin Seiki Co Ltd | Bumper device |
| US6758506B2 (en) * | 2002-03-08 | 2004-07-06 | Compagnie Plastic Omnium | Energy absorber for interposing between a rigid beam and a bumper skin, and an energy-absorbing assembly |
| JP2010517849A (en) * | 2007-02-02 | 2010-05-27 | ネットシェイプ・エナジー・マネージメント・リミテッド・ライアビリティ・カンパニー | Energy absorber with crash box and back strap |
| US20120126553A1 (en) * | 2010-11-10 | 2012-05-24 | GM Global Technology Operations LLC | Bumper cross member for a motor vehicle, reinforcement component for a bumper cross member and method for producing a bumper cross member |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0238377A (en) * | 1988-06-16 | 1990-02-07 | Kernforschungsanlage Juelich Gmbh | Connection of ceramic parts |
| JPH02299947A (en) * | 1989-02-21 | 1990-12-12 | Nippon G Ii Plast Kk | Resin bumper for automobile use |
-
1991
- 1991-10-09 JP JP3261606A patent/JP2596660B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0238377A (en) * | 1988-06-16 | 1990-02-07 | Kernforschungsanlage Juelich Gmbh | Connection of ceramic parts |
| JPH02299947A (en) * | 1989-02-21 | 1990-12-12 | Nippon G Ii Plast Kk | Resin bumper for automobile use |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002067842A (en) * | 2000-08-29 | 2002-03-08 | Aisin Seiki Co Ltd | Bumper device |
| JP4529257B2 (en) * | 2000-08-29 | 2010-08-25 | アイシン精機株式会社 | Bumper equipment |
| US6758506B2 (en) * | 2002-03-08 | 2004-07-06 | Compagnie Plastic Omnium | Energy absorber for interposing between a rigid beam and a bumper skin, and an energy-absorbing assembly |
| JP2010517849A (en) * | 2007-02-02 | 2010-05-27 | ネットシェイプ・エナジー・マネージメント・リミテッド・ライアビリティ・カンパニー | Energy absorber with crash box and back strap |
| US20120126553A1 (en) * | 2010-11-10 | 2012-05-24 | GM Global Technology Operations LLC | Bumper cross member for a motor vehicle, reinforcement component for a bumper cross member and method for producing a bumper cross member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2596660B2 (en) | 1997-04-02 |
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