JP2015128950A5

JP2015128950A5 -

Info

Publication number: JP2015128950A5
Application number: JP2014001648A
Authority: JP
Filing date: 2014-01-08
Publication date: 2017-02-09
Anticipated expiration: 2034-01-08

Description

各突起部３の側面は階段状をなしており、その段差ｈは、基部３１の段差ｈ１が最も大きく、中間部３２の段差ｈ２がこれに次ぎ、先端部３３の段差ｈ３が最も小さい。また、突起部３の基部３１における樹脂厚さｄ１／段差高ｈ１は、先端部３３における樹脂厚さｄ３／段差高ｈ３と略等しいか僅かに大きい（１００〜１２０％）ことが好ましい。また、各突起部３の段差高ｈ１〜ｈ３は樹脂厚さｄ１〜ｄ３以上で３倍以下が好適であり、さらに好ましくは樹脂厚さｄ１〜ｄ３の２倍程度である。なお、図示例では３〜４段ずつ一組にして同じ段差高の領域になっているが、１〜２段ずつ、あるいは、全段同じ段差でも良い。各突起部３は正方格子状に配列されているが、六方格子状や斜格子状、あるいは、ランダムに配置されても良い。 The side surfaces of the protrusions 3 are stepped, and the level difference h of the base 31 is the largest, the level h2 of the intermediate part 32 is next, and the level h3 of the tip 33 is the smallest. The resin thickness d1 / step height h1 at the base 31 of the protrusion 3 is preferably substantially equal to or slightly larger (100 to 120%) than the resin thickness d3 / step height h3 at the tip 33. Further, the step heights h1 to h3 of the respective protrusions 3 are preferably not less than the resin thickness d1 to d3 and not more than 3 times, more preferably about 2 times the resin thickness d1 to d3. Although it has been in the area of the same step height in the set by 3-4 stages in the illustrated embodiment, each 1-2 stages, or may be in all stages the same step. The protrusions 3 are arranged in a square lattice shape, but may be arranged in a hexagonal lattice shape, a diagonal lattice shape, or randomly.

以上のように形成された衝撃吸収材１は、図２に示されるように、車体側の取付面４１と内装材（または外装材）４２との間に介装され、ベース部２が車体側の取付面４１に固定される。この状態で、突起部３の頂面４の小突起６が内装材４２の裏面に当接するように、突起部３の高さが事前に調整されている。上述の通り、衝撃吸収材１は、ベース部２からの高さが、段差ｈ１，ｈ２，ｈ３の領域の順に、高くなるほど樹脂の厚さｄ１，ｄ２，ｄ３が小さく、突起部３の先端側ほど変形し易い特徴を有している。 As shown in FIG. 2, the shock absorbing material 1 formed as described above is interposed between the mounting surface 41 on the vehicle body side and the interior material (or exterior material) 42, and the base portion 2 is disposed on the vehicle body side. The mounting surface 41 is fixed. In this state, the height of the protrusion 3 is adjusted in advance so that the small protrusion 6 on the top surface 4 of the protrusion 3 contacts the back surface of the interior material 42. As described above, the shock absorber 1 has a resin thickness d1, d2, d3 that is smaller as the height from the base portion 2 is increased in the order of the steps h1, h2, h3 , and the tip side of the protrusion 3 It has a characteristic that it is easily deformed.

このような衝撃吸収材１を介装した自動車の内装材４２に不慮の事態により乗員が衝突した場合、衝撃力Ｆが内装材４２に加わると、衝撃吸収材１は、段差が小さく（ｈ３）かつ薄肉（ｄ３）の先端部３３から初期変形が誘導され、中間部３２から基端部３１に変形が進むにつれて吸収量が大きくなる理想的なエネルギー吸収パターンとなる。また、段差形状で変形が誘導されることで、突起部が倒れるのが防止され、確実に衝撃吸収できる利点もある。 When an occupant collides with the interior material 42 of the automobile interposing the impact absorber 1 due to an unexpected situation, when the impact force F is applied to the interior material 42, the impact absorber 1 has a small step ( h3 ). In addition, the initial deformation is induced from the distal end portion 33 of the thin wall (d3), and an ideal energy absorption pattern is obtained in which the amount of absorption increases as the deformation progresses from the intermediate portion 32 to the proximal end portion 31. In addition, since the deformation is induced in the step shape, the protrusion is prevented from falling down, and there is an advantage that the shock can be absorbed reliably.