JPS6324046Y2 - - Google Patents
Info
- Publication number
- JPS6324046Y2 JPS6324046Y2 JP1982111023U JP11102382U JPS6324046Y2 JP S6324046 Y2 JPS6324046 Y2 JP S6324046Y2 JP 1982111023 U JP1982111023 U JP 1982111023U JP 11102382 U JP11102382 U JP 11102382U JP S6324046 Y2 JPS6324046 Y2 JP S6324046Y2
- Authority
- JP
- Japan
- Prior art keywords
- bumper
- synthetic resin
- base material
- resin layer
- present
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 31
- 239000000057 synthetic resin Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 27
- 238000005452 bending Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 241000264877 Hippospongia communis Species 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 2
- 229920000299 Nylon 12 Polymers 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 229920005669 high impact polystyrene Polymers 0.000 description 1
- 239000004797 high-impact polystyrene Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
本考案は車両用バンパーに関し、詳しくは軽量
でかつ耐衝撃性にすぐれた車両用バンパーに関す
る。
従来、車両用のバンパーとして金属製のバン
パー基材の表面の全面あるいはその一部にゴム材
等からなる衝撃吸収ガードを取付けたものや合
成樹脂を射出成形あるいは圧縮成形して得られた
もの若しくはポリウレタン等を発泡成形して得ら
れたもの等が使用されている。
しかしながら、のものは重量が増大するの
で、その取付け作業が困難となつたり、車輌の燃
費が低下するなどの欠点があり、また衝突時には
軽衝撃であつてもバンパーがへこみ永久変形して
外観が極めて悪化するという欠点がある。また、
のものは一般に剛性が不足しており、軽衝撃で
あつても大きく変形して車両本体を損傷するとい
う欠点がある。また、剛性不足を補うため肉厚に
したものは成形サイクルが長くなつたり、変形が
大きくなる等、加工性が低下したり、重量が増加
する等の欠点がある。
本考案は上記従来の欠点を解消して、軽量でか
つ剛性、エネルギー吸収性、耐衝撃性にすぐれた
車両用バンパーを提供することを目的とするもの
である。
すなわち、本考案は合成樹脂からなる断面略コ
字状のバンパー基材１の上面および下面の少なく
とも一方の表面に、該バンパー基材１よりも曲げ
弾性率の高い合成樹脂層２を積層してなるバンパ
ーを提供するものである。
以下、本考案を図面により説明する。第１図は
本考案のバンパーの斜視図であり、第２図は第１
図の中央部縦断面図である。
バンパー基材１は合成樹脂からなるものであ
り、用いられる合成樹脂としては特に制限はない
が、ポリプロピレン、特にプロピレンコポリマ
ー、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリ
カーボネート、ナイロン−６、ナイロン−66、ナ
イロン−11、ナイロン−12、低密度ポリエチレ
ン、高密度ポリエチレン、耐衝撃性ポリスチレ
ン、アクリロニトリル−ブタジエン−スチレン樹
脂（ABS樹脂）等あるいはこれらの混合物が好
ましく、特に射出成形可能な硬質樹脂が好まし
い。必要に応じこれらにフアイバーあるいは粒状
物などの無機充填剤や有機繊維その他の添加剤を
適宜加えることもできる。
次に、上記合成樹脂からなるバンパー基材１に
積層する合成樹脂層２は該バンパー基材１よりも
曲げ弾性率の高い硬質の合成樹脂よりなるもので
あることが必要である。ここで用いる合成樹脂は
バンパー基材１よりも硬質のものであれば特に制
限はないが、ポリプロピレン、ポリカーボネー
ト、ナイロン−６、ナイロン−66、ナイロン−
11、ナイロン−12、高密度ポリエチレン、ABS
樹脂等あるいはこれらの混合物が好ましく、特に
射出成形可能な硬質樹脂が好ましい。必要に応じ
これらにフアイバーあるいは粒状物などの無機充
填剤や有機繊維その他の添加剤を適宜加えること
もできる。
バンパー基材１は断面略コ字状をなしている
が、該バンパー基材１の少なくとも上面あるいは
下面の一方の表面に該バンパー基材１よりも曲げ
弾性率の高い上記合成樹脂層（以下、硬質合成樹
脂層という）２を積層することが必要である。バ
ンパー基材１のフロント部やフロント部とサイド
部の中間のコーナー部近辺のみに該硬質合成樹脂
層２を積層しても充分な効果を発揮することはで
きない。但し、バンパーの重量をあまり増大させ
ない範囲内において、バンパー基材１の上面ある
いは下面の一方の表面だけでなく、両面全部ある
いは他の部分の表面、たとえばバンパー基材１の
フロント部やフロント部とサイド部の中間のコー
ナー部近辺にも積層することができる。
バンパー基材１と硬質合成樹脂層２の厚みの比
は各種条件により異なり一義的に定めることは困
難であるが、一般にバンパー基材１の厚み／硬質
合成樹脂層２の厚み＝1/6〜6/1の範囲が好まし
い。両者の厚みの比がこの範囲外であるとエネル
ギー吸収性が低下したり、あるいは剛性が低下し
たりするので好ましくない。
本考案のバンパーの製法は特に制限がなく、各
種方法により行なうことが可能であり、バンパー
基材１と硬質合成樹脂層２をそれぞれ形成してい
る合成樹脂の溶解度パラメーターが近似する場合
は、特公昭55−7375号公報や同51−41665号公報
等に開示されているような方法により有利に成形
することができる。
また、両者の溶解度パラメーターが異なる場合
は、積層する硬質合成樹脂を予め射出成形した
り、あるいはシート化した硬質合成樹脂を圧縮成
形および熱成形により賦型した後、射出成形用金
型キヤビテイにインサートしてバンパー基材１と
一体化することができるし、あるいは接着剤また
は高周波融着等の手段により化学的、物理的に接
合して一体化することもできる。さらに、通常他
の分野で行なわれている係止手段を一方に設けて
おき、射出成形または圧縮成形により成形するこ
ともできる。第３図はそのようにして成形した態
様を示したものである。
このようにして得られる本考案のバンパーは衝
突時、特に軽衝撃に対してバンパー基材の柔軟性
で衝撃エネルギーを吸収して車両本体への衝撃力
を緩和し、車両本体および塔乗者を保護し、硬質
合成樹脂層の剛性でバンパーの変形を防止して外
観の悪化を阻止することができるので、実用上の
効果が大きい。
さらに、通常の射出成形により得られる合成樹
脂製バンパーはソリ等の変形で外観不良を起こし
ていたが、本考案のバンパーは収縮率の異なつた
合成樹脂を用いて射出成形により一体成形した
り、あるいは接着剤等を用いて積層するので、ソ
リ等の変形がない。また、従来のバンパーはリブ
またはハニカムにより強度をもたせていたので、
ヒケを起こしていたが、本考案のバンパーはバン
パー基材の上面および下面の少なくとも一方の表
面に積層された硬質合成樹脂層で剛性をもたせて
いるので、リブやハニカムの数を少なくすること
ができ、リブ等の肉厚も薄くすることができる。
したがつて本考案のバンパーは従来のバンパーに
比べて外観が向上している。しかも、本考案のバ
ンパーは異種の合成樹脂の組合せにより強度をも
たせているので、従来のバンパーのように肉厚や
リブあるいはハニカムで強度をもたせる必要がな
く、その分軽量化でき、燃費の向上を図ることが
できる。
また、ソリ等の変形はバンパーを車両本体に据
え付ける際著しく作業性を低下させるが、本考案
のバンパーはソリ等の変形がないので作業性が高
い。のみならず、バンパー基材と硬質合成樹脂層
とを色分けすることにより、需要に応じたカラフ
ルなバンパーが得られ、従来のような二次加工の
塗装工程を省略することができるので作業性の向
上に寄与するところが大きいものである。
したがつて本考案のバンパーはバンパー製造
業、自動車製造業などの分野において有効に利用
することができる。
以下、本考案の実施例を示す。
実施例および比較例
ポリピロピレン（肉厚２mm）よりなるバンパー
基材にポリプロピレンに無機質を充填した複合材
料（肉厚２mm）からなる硬質合成樹脂層を積層し
て第１図に示す形状のバンパー（フロント部巾
1400mm、高さ250mm、サイド部巾300mm）を得た。
得られたバンパーの各種性能試験の結果を第１表
に示す。
なお、比較のために従来品であるポリプロピレ
ンバンパー（肉厚４mm）を同様の形状に成形して
各種性能を試験した。結果を第１表に示す。
The present invention relates to a vehicle bumper, and more particularly to a vehicle bumper that is lightweight and has excellent impact resistance. Conventionally, bumpers for vehicles have been manufactured by attaching a shock absorbing guard made of rubber material to the entire surface or part of the surface of a metal bumper base material, or by injection molding or compression molding of synthetic resin. Those obtained by foam molding polyurethane or the like are used. However, these have disadvantages such as increased weight, which makes installation work difficult, and reduced fuel efficiency of the vehicle.Furthermore, in the event of a collision, even a light impact can cause the bumper to dent and become permanently deformed, resulting in a disfigured exterior. The disadvantage is that it gets extremely worse. Also,
These generally lack rigidity, and have the disadvantage that even a light impact can cause significant deformation and damage to the vehicle body. Furthermore, those made thicker to compensate for the lack of rigidity have drawbacks such as a longer molding cycle, increased deformation, reduced workability, and increased weight. The object of the present invention is to eliminate the above-mentioned conventional drawbacks and provide a vehicle bumper that is lightweight and has excellent rigidity, energy absorption, and impact resistance. That is, in the present invention, a synthetic resin layer 2 having a higher bending elastic modulus than the bumper base material 1 is laminated on at least one of the upper and lower surfaces of a bumper base material 1 made of synthetic resin and having a generally U-shaped cross section. This provides a bumper that will The present invention will be explained below with reference to the drawings. Figure 1 is a perspective view of the bumper of the present invention, and Figure 2 is a perspective view of the bumper of the present invention.
FIG. 3 is a vertical cross-sectional view of the central part of the figure. The bumper base material 1 is made of a synthetic resin, and there are no particular limitations on the synthetic resin used, but examples include polypropylene, particularly propylene copolymer, polyvinyl chloride, polyvinylidene chloride, polycarbonate, nylon-6, nylon-66, and nylon. -11, nylon-12, low-density polyethylene, high-density polyethylene, high-impact polystyrene, acrylonitrile-butadiene-styrene resin (ABS resin), or mixtures thereof are preferred, and injection moldable hard resins are particularly preferred. If necessary, inorganic fillers such as fibers or granules, organic fibers, and other additives may be added as appropriate. Next, the synthetic resin layer 2 laminated on the bumper base material 1 made of the above-mentioned synthetic resin needs to be made of a hard synthetic resin having a higher bending elastic modulus than the bumper base material 1. The synthetic resin used here is not particularly limited as long as it is harder than the bumper base material 1, but polypropylene, polycarbonate, nylon-6, nylon-66, nylon-
11, nylon-12, high-density polyethylene, ABS
Resins or mixtures thereof are preferred, and hard resins that can be injection molded are particularly preferred. If necessary, inorganic fillers such as fibers or granules, organic fibers, and other additives may be added as appropriate. The bumper base material 1 has a substantially U-shaped cross section, and at least one of the upper and lower surfaces of the bumper base material 1 is coated with the synthetic resin layer (hereinafter referred to as It is necessary to laminate a hard synthetic resin layer (2). Even if the hard synthetic resin layer 2 is laminated only in the vicinity of the front part of the bumper base material 1 or the intermediate corner part between the front part and the side part, a sufficient effect cannot be exhibited. However, within a range that does not significantly increase the weight of the bumper, it is possible to apply not only the top or bottom surface of the bumper base material 1, but also the entire surface of both sides or other parts of the bumper base material 1, such as the front part or the front part of the bumper base material 1. It can also be laminated near the middle corners of the side parts. The ratio of the thicknesses of the bumper base material 1 and the hard synthetic resin layer 2 varies depending on various conditions and is difficult to determine unambiguously, but generally the thickness of the bumper base material 1/thickness of the hard synthetic resin layer 2 = 1/6 ~ A range of 6/1 is preferred. If the ratio of both thicknesses is outside this range, the energy absorption property or rigidity will decrease, which is not preferable. The manufacturing method of the bumper of the present invention is not particularly limited and can be carried out by various methods.If the solubility parameters of the synthetic resins forming the bumper base material 1 and the hard synthetic resin layer 2 are similar, It can be advantageously molded by methods such as those disclosed in Japanese Publications No. 55-7375 and No. 51-41665. In addition, if the solubility parameters of the two are different, the hard synthetic resin to be laminated may be injection molded in advance, or the hard synthetic resin sheet may be shaped by compression molding or thermoforming, and then inserted into the injection mold cavity. It can be integrated with the bumper base material 1, or it can be chemically or physically bonded using adhesives, high frequency welding, or the like. Furthermore, it is also possible to provide a locking means on one side, which is commonly used in other fields, and to mold it by injection molding or compression molding. FIG. 3 shows an embodiment formed in this manner. The bumper of the present invention obtained in this way absorbs impact energy with the flexibility of the bumper base material in the event of a collision, especially for light impacts, and reduces the impact force on the vehicle body, thereby protecting the vehicle body and the occupants. The rigidity of the hard synthetic resin layer prevents deformation of the bumper and prevents deterioration of its appearance, which has a great practical effect. In addition, synthetic resin bumpers obtained through normal injection molding have had poor appearance due to deformation such as warping, but the bumper of the present invention is integrally molded by injection molding using synthetic resins with different shrinkage rates. Alternatively, since they are laminated using an adhesive or the like, there is no warping or other deformation. In addition, conventional bumpers were strengthened by ribs or honeycombs, so
However, since the bumper of the present invention has rigidity with a hard synthetic resin layer laminated on at least one of the top and bottom surfaces of the bumper base, it is possible to reduce the number of ribs and honeycombs. It is also possible to reduce the thickness of ribs, etc.
Therefore, the bumper of the present invention has an improved appearance compared to conventional bumpers. Moreover, since the bumper of this invention is made strong by combining different types of synthetic resins, there is no need to add strength with thick walls, ribs, or honeycombs like in conventional bumpers, which reduces weight and improves fuel efficiency. can be achieved. In addition, deformations such as warping significantly reduce work efficiency when installing a bumper on a vehicle body, but the bumper of the present invention has high workability because it does not have warping or other deformations. Not only that, by color-coding the bumper base material and the hard synthetic resin layer, colorful bumpers can be obtained according to demand, and the conventional secondary painting process can be omitted, improving workability. This greatly contributes to improvement. Therefore, the bumper of the present invention can be effectively used in fields such as the bumper manufacturing industry and the automobile manufacturing industry. Examples of the present invention will be shown below. Examples and Comparative Examples A bumper with the shape shown in Fig. 1 (front Part width
1400mm, height 250mm, side width 300mm).
Table 1 shows the results of various performance tests on the obtained bumper. For comparison, a conventional polypropylene bumper (thickness: 4 mm) was molded into the same shape and various performances were tested. The results are shown in Table 1.
【表】【table】
第１図は本考案のバンパーの斜視図であり、第
２図は第１図の中央部縦断面図である。第３図ａ
〜ｃはバンパー基材と硬質合成樹脂層との積層の
態様を示す拡大断面図である。
１……バンパー基材、２……硬質合成樹脂層。
FIG. 1 is a perspective view of the bumper of the present invention, and FIG. 2 is a longitudinal cross-sectional view of the central part of FIG. Figure 3a
-c are enlarged cross-sectional views showing aspects of lamination of a bumper base material and a hard synthetic resin layer. 1...Bumper base material, 2...Hard synthetic resin layer.
Claims (1)
材１の上面および下面の少なくとも一方の表面
に、該バンパー基材１よりも曲げ弾性率の高い
合成樹脂層２を積層してなるバンパー。 (2) 曲げ弾性率の高い合成樹脂層の素材たる合成
樹脂がバンパー基材の素材たる合成樹脂とは異
種のものである実用新案登録請求の範囲第１項
記載のバンパー。[Claims for Utility Model Registration] (1) A synthetic resin having a higher bending elastic modulus than the bumper base material 1 on at least one of the upper and lower surfaces of the bumper base material 1, which is made of synthetic resin and has a substantially U-shaped cross section. A bumper made by laminating layer 2. (2) The bumper according to claim 1, wherein the synthetic resin that is the material of the synthetic resin layer having a high flexural modulus is different from the synthetic resin that is the material of the bumper base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11102382U JPS5916257U (en) | 1982-07-23 | 1982-07-23 | bumper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11102382U JPS5916257U (en) | 1982-07-23 | 1982-07-23 | bumper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5916257U JPS5916257U (en) | 1984-01-31 |
| JPS6324046Y2 true JPS6324046Y2 (en) | 1988-07-01 |
Family
ID=30257969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11102382U Granted JPS5916257U (en) | 1982-07-23 | 1982-07-23 | bumper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5916257U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61166908U (en) * | 1985-04-05 | 1986-10-16 | ||
| JP2600246B2 (en) * | 1988-01-26 | 1997-04-16 | スズキ株式会社 | Car bumper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55163254U (en) * | 1979-05-14 | 1980-11-22 |
-
1982
- 1982-07-23 JP JP11102382U patent/JPS5916257U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5916257U (en) | 1984-01-31 |
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