JP7303086B2 - shock absorbing structure - Google Patents

shock absorbing structure Download PDF

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JP7303086B2
JP7303086B2 JP2019186939A JP2019186939A JP7303086B2 JP 7303086 B2 JP7303086 B2 JP 7303086B2 JP 2019186939 A JP2019186939 A JP 2019186939A JP 2019186939 A JP2019186939 A JP 2019186939A JP 7303086 B2 JP7303086 B2 JP 7303086B2
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rib
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absorbing structure
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ribs
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敬亮 杉山
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Nihon Plast Co Ltd
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Description

本発明は、互いに対向配置された部材を備える衝撃吸収構造に関する。 TECHNICAL FIELD The present invention relates to an impact-absorbing structure comprising members arranged opposite to each other.

従来、例えば自動車などの車両には、衝撃を吸収し乗員を保護するための衝撃吸収構造が設けられる。例えば、車室を開閉するドアにおいて、ドア部材に対して車室側に配置されるドアトリムを備え、ドアトリムの背面に複数のリブが突設されたものが知られている。そして、車外側からの衝撃によりドアトリム側に移動したドア部材とリブとが当接してリブが変形することで衝撃を吸収する。この構造では、リブの長さを異ならせることにより、衝撃の大きさに応じてドア部材とリブとが当接するタイミングを段階的に異ならせ、衝撃の大きさに拘らずピーク荷重での衝撃吸収を設定している（例えば、特許文献１参照。）。 2. Description of the Related Art Conventionally, a vehicle such as an automobile is provided with a shock absorbing structure for absorbing shock and protecting passengers. For example, there is known a door for opening and closing a vehicle compartment, which includes a door trim arranged on the vehicle compartment side with respect to a door member, and a plurality of ribs projecting from the rear surface of the door trim. Then, the door member moved toward the door trim by an impact from the outside of the vehicle comes into contact with the rib, and the rib deforms to absorb the impact. In this structure, by varying the length of the ribs, the timing of contact between the door member and the ribs is changed in stages according to the magnitude of the impact. is set (see, for example, Patent Document 1).

特開平６－７２１５３号公報 （第２－４頁、図１－３）Japanese Patent Application Laid-Open No. 6-72153 (pages 2-4, Fig. 1-3)

上述の衝撃吸収構造では、個々のリブのみによって衝撃吸収構造の変形を抑制するため、変形の抑制が不十分となってピーク荷重以降に反力が急激に減少しないように、リブそのものの強度を向上したり、他の衝撃吸収部材を用いたりする必要がある。 In the shock absorbing structure described above, the deformation of the shock absorbing structure is suppressed only by the individual ribs. It needs to be improved or another shock absorbing member must be used.

本発明は、このような点に鑑みなされたもので、ピーク荷重以降の反力低下を緩やかにできる衝撃吸収構造を提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a shock absorbing structure capable of slowing down the reaction force after a peak load.

請求項１記載の衝撃吸収構造は、第一部材と、この第一部材に対向して配置される第二部材と、を備え、前記第一部材は、前記第二部材に向かい突出する第一リブを有し、前記第二部材は、前記第一部材に向かい突出する第二リブを有し、前記第一リブと前記第二リブとの少なくとも一方が、前記第一リブと前記第二リブとの他方の側面に向かって延びており、前記第二リブは、突出長さが異なる複数種のリブより構成されているものである。 A shock absorbing structure according to claim 1 comprises a first member and a second member arranged to face the first member, the first member protruding toward the second member. a rib, wherein the second member has a second rib protruding toward the first member, and at least one of the first rib and the second rib is the first rib and the second rib; and the second rib is composed of a plurality of types of ribs having different projecting lengths .

請求項２記載の衝撃吸収構造は、請求項１記載の衝撃吸収構造において、第一リブの先端部と第二リブの先端部とは、突出方向に対し交差する方向から見て互いにオーバラップしているものである。 In the impact absorbing structure according to claim 2, in the impact absorbing structure according to claim 1, the tip portion of the first rib and the tip portion of the second rib overlap each other when viewed from a direction intersecting the projecting direction. There is.

請求項３記載の衝撃吸収構造は、請求項１または２記載の衝撃吸収構造において、第一リブと第二リブとは、互いに非接触状態であるものである。 According to a third aspect of the impact absorbing structure, in the first or second aspect of the impact absorbing structure, the first rib and the second rib are in non-contact with each other.

請求項４記載の衝撃吸収構造は、請求項１ないし３いずれか一記載の衝撃吸収構造において、第一部材及び第二部材は、それぞれ板状に形成された第一部材本体部及び第二部材本体部を備え、第一リブ及び第二リブの突出方向は、前記第一部材本体部及び前記第二部材本体部の板厚方向に対し傾斜しているものである。 The impact absorbing structure according to claim 4 is the impact absorbing structure according to any one of claims 1 to 3, wherein the first member and the second member are plate-shaped first member main body and second member, respectively. A main body portion is provided, and projection directions of the first rib and the second rib are inclined with respect to the plate thickness direction of the first member main body portion and the second member main body portion.

請求項５記載の衝撃吸収構造は、請求項１ないし４いずれか一記載の衝撃吸収構造において、第一部材及び第二部材は、物品を収納する収納装置の開閉用の蓋体の少なくとも一部を構成しているものである。 The shock absorbing structure according to claim 5 is the shock absorbing structure according to any one of claims 1 to 4, wherein the first member and the second member are at least a part of a lid for opening and closing a storage device for storing articles. is what constitutes

請求項１記載の衝撃吸収構造によれば、荷重によって第一部材と第二部材とが相対的に接近するように変形したときに、第二リブを構成する相対的に長いリブが変形して荷重を吸収した後、第二リブを構成する相対的に短いリブの先端部が第一部材に近接または当接し第一リブと第二リブとが互いに違いに重なってトラス状の構造を形成し、第一リブと第二リブとが支え合うことで急激な変形を抑制できるので、ピーク荷重以降の反力低下を緩やかにすることができる。 According to the shock absorbing structure of claim 1, when the first member and the second member are deformed by a load so as to approach each other relatively , the relatively long ribs forming the second ribs are deformed. After absorbing the load, the tip of the relatively short rib that constitutes the second rib comes close to or abuts the first member, and the first rib and the second rib overlap each other to form a truss-like structure. Since the first ribs and the second ribs support each other, rapid deformation can be suppressed, so that the decrease in reaction force after the peak load can be moderated.

請求項２記載の衝撃吸収構造によれば、請求項１記載の衝撃吸収構造の効果に加えて、荷重によって第一部材と第二部材とが相対的に互いに接近するように変形したときに、第一リブ間及び第二リブ間に第二リブ及び第一リブが入り込みやすくなるので、第一リブと第二リブとが互いに違いに重なってトラス状の構造を容易に形成可能となる。 According to the shock absorbing structure of claim 2, in addition to the effect of the shock absorbing structure of claim 1, when the first member and the second member are deformed so as to approach each other relatively due to the load, Since the second ribs and the first ribs can easily enter between the first ribs and between the second ribs, the first ribs and the second ribs can overlap each other to easily form a truss-like structure.

請求項３記載の衝撃吸収構造によれば、請求項１または２記載の衝撃吸収構造の効果に加えて、荷重によって第一部材と第二部材とが相対的に接近するように変形したときに、第一リブと第二リブとが互いの接触により破損しにくくし、トラス状の構造を確実に形成できるとともに、第一リブと第二リブとの接触により不安定な反力が生じることを抑制できる。 According to the impact-absorbing structure of claim 3, in addition to the effect of the impact-absorbing structure of claim 1 or 2, when the first member and the second member are deformed so as to relatively approach each other due to the load, , the first rib and the second rib are less likely to be damaged due to mutual contact, the truss-like structure can be reliably formed, and the contact between the first rib and the second rib causes an unstable reaction force. can be suppressed.

請求項４記載の衝撃吸収構造によれば、請求項１ないし３いずれか一記載の衝撃吸収構造の効果に加えて、荷重によって第一部材と第二部材とが相対的に接近するように変形したときに、第一リブと第二リブとがトラス状の構造を容易に形成可能となる。 According to the shock absorbing structure according to claim 4, in addition to the effect of the shock absorbing structure according to any one of claims 1 to 3, the load causes the first member and the second member to deform so as to approach each other. When this is done, the first rib and the second rib can easily form a truss-like structure.

請求項５記載の衝撃吸収構造によれば、請求項１ないし４いずれか一記載の衝撃吸収構造の効果に加えて、収納装置の蓋体に乗員の保護機能を容易に持たせることができる。 According to the shock absorbing structure of claim 5, in addition to the effect of the shock absorbing structure of any one of claims 1 to 4, the lid body of the storage device can easily have the function of protecting the occupant.

本発明の第１の実施の形態の衝撃吸収構造を示す断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the impact-absorbing structure of the 1st Embodiment of this invention. 同上衝撃吸収構造の斜視断面図である。It is a perspective sectional view of a shock-absorbing structure same as the above. 同上衝撃吸収構造を有する収納装置を示す斜視図である。Fig. 2 is a perspective view showing a storage device having the same impact absorbing structure; 同上衝撃吸収構造に対し衝撃が加わった状態を示す断面図である。FIG. 4 is a cross-sectional view showing a state in which an impact is applied to the same impact absorbing structure; 比較例の衝撃吸収構造を示す断面図である。FIG. 4 is a cross-sectional view showing a shock absorbing structure of a comparative example; 比較例の衝撃吸収構造に対し衝撃が加わった状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state in which an impact is applied to the impact absorbing structure of the comparative example; 同上衝撃吸収構造と比較例の衝撃吸収構造との反力特性を示すグラフである。4 is a graph showing the reaction force characteristics of the same impact absorbing structure and the impact absorbing structure of a comparative example. 本発明の第２の実施の形態の衝撃吸収構造を示す断面図である。It is a sectional view showing the shock absorption structure of a 2nd embodiment of the present invention. 同上衝撃吸収構造の斜視断面図である。It is a perspective sectional view of a shock-absorbing structure same as the above.

以下、本発明の第１の実施の形態について、図面を参照して説明する。 A first embodiment of the present invention will be described below with reference to the drawings.

図１及び図２において、10は衝撃吸収構造である。衝撃吸収構造10は、自動車などの車両に配置される車両用の衝撃吸収構造であり、衝突時の衝撃などに対し乗員を保護するものである。 1 and 2, 10 is a shock absorbing structure. The shock absorbing structure 10 is a shock absorbing structure for vehicles arranged in a vehicle such as an automobile, and protects the occupant from the shock at the time of collision.

衝撃吸収構造10は、第一部材15と、第二部材16とを備えている。第一部材15及び第二部材16は、例えば合成樹脂により一体的に形成されている。第一部材15と第二部材16とは、空間部17を間に有して互いに対向するように配置されている。 The shock absorbing structure 10 comprises a first member 15 and a second member 16. As shown in FIG. The first member 15 and the second member 16 are integrally formed of synthetic resin, for example. The first member 15 and the second member 16 are arranged to face each other with the space 17 therebetween.

第一部材15は、乗員側または車内側に配置されるアウタ部材である。第一部材15は、板状に形成された第一部材本体部21と、第一部材本体部21から第二部材16側に向かって突設された第一リブ22とを有する。本実施の形態において、第一部材本体部21は、平板状に形成されている。第一部材本体部21は、一定または略一定の厚みに形成されている。 The first member 15 is an outer member arranged on the passenger side or the vehicle inner side. The first member 15 has a plate-shaped first member main body portion 21 and a first rib 22 projecting from the first member main body portion 21 toward the second member 16 side. In this embodiment, the first member body portion 21 is formed in a flat plate shape. The first member body portion 21 is formed with a constant or substantially constant thickness.

第一リブ22は、第一部材本体部21の乗員側、すなわち車内側に突設され、空間部17に位置している。第一リブ22は、第一部材本体部21の板厚方向（図１に示す上下方向）に対し交差または直交する方向（図１に示す左右方向）に板厚を有する板状である。第一リブ22は、第一部材本体部21に複数形成されている。本実施の形態において、第一リブ22は、二つずつを一ユニットとして、複数ユニット配置され、各ユニットにおける第一リブ22の間隔と比較して、ユニット間の間隔が大きく設定されている。図示される例では、各ユニットにおける第一リブ22の間隔に対し、ユニット間の間隔が二倍または略二倍に設定されている。第一リブ22の突出方向は、第一部材本体部21の板厚方向に対し傾斜している。本実施の形態において、第一リブ22の突出方向は、第一部材本体部21の板厚方向に対し、鋭角状に傾斜している。また、第一リブ22の突出方向は、互いに平行または略平行となっている。さらに、第一リブ22は、第二部材16に対し離れて位置している。すなわち、第一リブ22は、第二部材16の第二部材本体部31及び第二リブ32に対し当接しない位置にある。図示される例では、第一リブ22と第二リブ32とは、互いに非接触状態にある。 The first rib 22 is located in the space portion 17 and protrudes toward the passenger side of the first member main body portion 21 , that is, toward the vehicle interior side. The first rib 22 has a plate shape having a thickness in a direction (horizontal direction shown in FIG. 1) intersecting or perpendicular to the thickness direction of the first member body portion 21 (vertical direction shown in FIG. 1). A plurality of first ribs 22 are formed on the first member body portion 21 . In the present embodiment, the first ribs 22 are arranged in a plurality of units each having two units, and the interval between the units is set larger than the interval between the first ribs 22 in each unit. In the illustrated example, the interval between the units is set to be twice or approximately twice the interval of the first ribs 22 in each unit. The projecting direction of the first rib 22 is inclined with respect to the plate thickness direction of the first member body portion 21 . In the present embodiment, the projecting direction of the first rib 22 is inclined at an acute angle with respect to the plate thickness direction of the first member body portion 21 . Moreover, the protruding directions of the first ribs 22 are parallel or substantially parallel to each other. Additionally, the first rib 22 is spaced apart from the second member 16 . That is, the first rib 22 is positioned so as not to contact the second member body portion 31 and the second rib 32 of the second member 16 . In the illustrated example, the first rib 22 and the second rib 32 are out of contact with each other.

第二部材16は、反乗員側または車外側に配置されるインナ部材である。第二部材16は、板状に形成された第二部材本体部31と、第二部材本体部31から第一部材15側に向かって突設された第二リブ32とを有する。本実施の形態において、第二部材本体部31は、平板状に形成されている。第二部材本体部31は、一定または略一定の厚みに形成されている。また、第二部材本体部31は、第一部材15の第一部材本体部21に対し、平行、または、略平行に配置されている。つまり、第二部材本体部31と第一部材本体部21との板厚方向は、互いに一致、または、略一致している。 The second member 16 is an inner member arranged on the side opposite to the passenger or on the outside of the vehicle. The second member 16 has a plate-shaped second member main body portion 31 and a second rib 32 projecting from the second member main body portion 31 toward the first member 15 side. In this embodiment, the second member main body portion 31 is formed in a flat plate shape. The second member body portion 31 is formed with a constant or substantially constant thickness. The second member body portion 31 is arranged parallel or substantially parallel to the first member body portion 21 of the first member 15 . That is, the plate thickness directions of the second member main body portion 31 and the first member main body portion 21 match or substantially match each other.

第二リブ32は、第二部材本体部31の乗員とは反対側、すなわち車外側に突設され、空間部17に位置している。第二リブ32は、第二部材本体部31に複数形成されている。第二リブ32は、第二部材本体部31の板厚方向（図１に示す上下方向）に対し交差または直交する方向（図１に示す左右方向）に板厚を有する板状である。第二リブ32の突出方向は、第二部材本体部31の板厚方向に対し傾斜している。本実施の形態において、第二リブ32の突出方向は、第二部材本体部31の板厚方向に対し、鋭角状に傾斜している。また、第二リブ32の突出方向は、互いに平行または略平行となっている。さらに、本実施の形態において、第二リブ32の突出方向は、第一リブ22の突出方向に対し交差する方向となっている。すなわち、第一部材本体部21に対する第一リブ22の傾斜方向と、第二部材本体部31に対する第二リブ32の傾斜方向とが互いに反対方向となっている。つまり、第一部材15を成形するときの第一リブ22の型抜き方向と、第二部材16を成形するときの第二リブ32の型抜き方向とが互いに異なっている。そのため、第一部材15と第二部材16との対向方向、または、第一部材本体部21と第二部材本体部31との板厚方向に対し、第一リブ22と第二リブ32とがそれぞれ同側に傾斜している。図１においては、第一リブ22及び第二リブ32のそれぞれが右側に傾斜している。 The second rib 32 is located in the space 17 and protrudes on the side of the second member main body 31 opposite to the occupant, that is, on the outside of the vehicle. A plurality of second ribs 32 are formed on the second member body portion 31 . The second rib 32 has a plate shape having a plate thickness in a direction (horizontal direction shown in FIG. 1) that intersects or is orthogonal to the plate thickness direction (vertical direction shown in FIG. 1) of the second member main body portion 31 . The projecting direction of the second rib 32 is inclined with respect to the plate thickness direction of the second member main body portion 31 . In the present embodiment, the projecting direction of the second rib 32 is inclined at an acute angle with respect to the plate thickness direction of the second member main body portion 31 . The projecting directions of the second ribs 32 are parallel or substantially parallel to each other. Furthermore, in the present embodiment, the projecting direction of the second ribs 32 is a direction that intersects the projecting direction of the first ribs 22 . That is, the inclination direction of the first rib 22 with respect to the first member main body portion 21 and the inclination direction of the second rib 32 with respect to the second member main body portion 31 are opposite to each other. That is, the direction in which the first ribs 22 are removed when the first member 15 is molded is different from the direction in which the second ribs 32 are removed when the second member 16 is molded. Therefore, the first rib 22 and the second rib 32 are aligned in the facing direction of the first member 15 and the second member 16 or in the plate thickness direction of the first member main body portion 21 and the second member main body portion 31. They are slanted to the same side. In FIG. 1, each of the first rib 22 and the second rib 32 is slanted to the right.

本実施の形態において、第二リブ32には、突出長さが相対的に長い一方のリブである長リブ34と、突出長さが相対的に短い他方のリブである短リブ35とが設定されている。 In the present embodiment, the second rib 32 includes a long rib 34, which is one rib with a relatively long projecting length, and a short rib 35, which is the other rib with a relatively short projecting length. It is

長リブ34は、先端部が第一部材15の第一部材本体部21と接触、または、第一部材15の第一部材本体部21に近接して位置している。短リブ35は、先端部が第一部材15の第一部材本体部21に対して離れて位置している。本実施の形態において、長リブ34は、第二部材本体部31の板厚方向と交差または直交する方向（図１に示す左右方向）に互いに等間隔または略等間隔に離れて配置されている。短リブ35は、長リブ34，34間に、単数または複数が配置されている。図示される例では、短リブ35は、長リブ34，34間に二つずつ、互いに離れて配置されている。本実施の形態において、長リブ34と短リブ35との間隔、及び、隣接する短リブ35，35の間隔は、互いに等しい、または、略等しい。つまり、第二リブ32は、全体として互いに等間隔または略等間隔に配置されている。 The tip of the long rib 34 is in contact with the first member main body portion 21 of the first member 15 or is positioned close to the first member main body portion 21 of the first member 15 . The short rib 35 has a distal end located away from the first member body portion 21 of the first member 15 . In the present embodiment, the long ribs 34 are arranged at equal intervals or substantially equal intervals in a direction that intersects or is perpendicular to the plate thickness direction of the second member main body portion 31 (horizontal direction shown in FIG. 1). . One or more of the short ribs 35 are arranged between the long ribs 34,34. In the illustrated example, the short ribs 35 are spaced two by two between the long ribs 34,34. In this embodiment, the distance between the long rib 34 and the short rib 35 and the distance between the adjacent short ribs 35, 35 are equal or substantially equal. In other words, the second ribs 32 are arranged at even or substantially equal intervals from each other as a whole.

また、長リブ34，34間に、第一部材15の第一リブ22が単数または複数位置している。図示される例では、長リブ34，34間に、第一部材15の第一リブ22が二つずつ位置している。すなわち、短リブ35と第一リブ22とは同数設けられている。各短リブ35は、その先端部が各第一リブ22の側面に向かって延びている。本実施の形態において、各短リブ35の先端部は、各第一リブ22の側面に近接している。すなわち、第二リブ32（短リブ35）と第一リブ22とは、互いの先端部が対向しないように配置されている。さらに、第二リブ32の短リブ35の先端部は、第一部材15（第一部材本体部21）と第二部材16（第二部材本体部31）との間隔の中間位置よりも第一部材15（第一部材本体部21）側に延びている。同様に、第一リブ22の先端部は、第一部材15（第一部材本体部21）と第二部材16（第二部材本体部31）との間隔の中間位置よりも第二部材16（第二部材本体部31）側に延びている。そのため、第一リブ22と第二リブ32（短リブ35）との先端部は、これら第一リブ22と第二リブ32との突出方向と交差する方向（図１に示す左右方向）から見て、互いにオーバラップしている（図１中の二点鎖線Ｌに囲む範囲に示す）。つまり、第一リブ22と第二リブ32（短リブ35）との先端部は、これら第一リブ22と第二リブ32との突出方向と交差する方向（図１に示す左右方向）に互い違いに重なるように位置している。 One or more first ribs 22 of the first member 15 are located between the long ribs 34,34. In the illustrated example, two first ribs 22 of the first member 15 are positioned between the long ribs 34,34. That is, the same number of short ribs 35 and first ribs 22 are provided. Each short rib 35 has its tip end extending toward the side surface of each first rib 22 . In this embodiment, the tip of each short rib 35 is close to the side surface of each first rib 22 . That is, the second ribs 32 (short ribs 35) and the first ribs 22 are arranged so that their distal ends do not face each other. Furthermore, the distal end portion of the short rib 35 of the second rib 32 is located at the first position relative to the intermediate position between the first member 15 (first member main body portion 21) and the second member 16 (second member main body portion 31). It extends toward the member 15 (the first member body portion 21). Similarly, the tip portion of the first rib 22 is positioned closer to the second member 16 ( It extends to the second member body portion 31) side. Therefore, the tip portions of the first rib 22 and the second rib 32 (short ribs 35) are viewed from a direction intersecting the projecting direction of the first rib 22 and the second rib 32 (horizontal direction shown in FIG. 1). , and overlap each other (indicated by a range surrounded by a two-dot chain line L in FIG. 1). That is, the tip portions of the first rib 22 and the second rib 32 (short rib 35) are staggered in a direction intersecting the projecting direction of the first rib 22 and the second rib 32 (horizontal direction shown in FIG. 1). It is located so that it overlaps with

なお、第一部材15と第二部材16とは、第一部材本体部21と第二部材本体部31との外縁部が他部材により連結されていてもよいし、第一部材本体部21と第二部材本体部31との外縁部に、互いに接合される第一接合部と第二接合部とを一体的に備えていてもよい。 Note that the first member 15 and the second member 16 may be connected by another member at the outer edge portions of the first member main body portion 21 and the second member main body portion 31, or the first member main body portion 21 and the first member main body portion 21 may be connected to each other. The outer edge portion of the second member main body portion 31 may be integrally provided with a first joint portion and a second joint portion that are joined to each other.

そして、衝撃吸収構造10は、本実施の形態において、例えば収納装置の蓋体に使用される。一例として、衝撃吸収構造10は、図３に示すように、車室の前席の前方のインストルメントパネルにて乗員に対向して配置される収納装置としてのグローブボックス41の開閉用の蓋体（リッド）42の少なくとも一部に用いられる。すなわち、第一部材15は、蓋体42の車内側に配置され、第二部材16は、第一部材15に対し車外側に配置される。そして、本実施の形態において、衝撃吸収構造10は、乗員の膝部を被保護部として保護する構造となっている。 Then, the shock absorbing structure 10 is used, for example, as a lid body of a storage device in the present embodiment. As an example, as shown in FIG. 3, the shock absorbing structure 10 is a lid body for opening and closing a glove box 41 as a storage device arranged facing the occupant on the instrument panel in front of the front seat of the passenger compartment. It is used for at least part of the (lid) 42 . That is, the first member 15 is arranged on the inner side of the lid body 42, and the second member 16 is arranged on the outer side of the first member 15. As shown in FIG. In the present embodiment, the shock absorbing structure 10 has a structure for protecting the occupant's knees as protected portions.

次に、第１の実施の形態の作用を説明する。 Next, operation of the first embodiment will be described.

例えば車両の側面衝突などによる側方からの衝撃により乗員の被保護部（膝部）が衝撃吸収構造10に当接すると、図４に示すように第一部材15に対し荷重Ｆが加わる。荷重Ｆが所定以上の場合、第一部材15及び第二部材16が変形する。つまり、第一部材15では、荷重Ｆが入力された位置から第一部材本体部21が第二部材16側へと湾曲するように撓み、それに伴い第一リブ22の先端部が、第一部材本体部21に対して傾斜した状態を保ちつつ第二部材16（第二部材本体部31）に近接または当接する。一方、第二部材16では、荷重Ｆの入力初期では、第一部材本体部21に当接する第二リブ32の長リブ34が変形することで、荷重Ｆを吸収し、その後、第二リブ32の短リブ35の先端部が、第一部材15の第一部材本体部21の変形に伴い第一部材15（第一部材本体部21）に近接または当接する。 For example, when the occupant's protected portion (knee) comes into contact with the shock absorbing structure 10 due to a side impact caused by a vehicle side collision or the like, a load F is applied to the first member 15 as shown in FIG. When the load F is greater than or equal to a predetermined value, the first member 15 and the second member 16 are deformed. In other words, in the first member 15, the first member main body portion 21 bends from the position where the load F is input to the second member 16 side, and along with this, the tip portion of the first rib 22 moves toward the first member. It approaches or abuts on the second member 16 (the second member main body portion 31) while maintaining an inclined state with respect to the main body portion 21. As shown in FIG. On the other hand, in the second member 16, at the initial stage of input of the load F, the long rib 34 of the second rib 32 in contact with the first member body portion 21 deforms to absorb the load F, and then the second rib 32 absorbs the load F. As the first member main body portion 21 of the first member 15 deforms, the distal end portion of the short rib 35 approaches or abuts on the first member 15 (first member main body portion 21).

そのため、第一リブ22の先端部が、第二リブ32（長リブ34または短リブ35）の基端部に近接または当接し、第二リブ32（短リブ35）の先端部が、第一リブ22の基端部に近接または当接するように、第一リブ22，22間に第二リブ32（短リブ35）が差し込まれ、第二リブ32，32（長リブ34及び短リブ35間、または、短リブ35，35間）に第一リブ22が差し込まれて、第一リブ22と第二リブ32とが組み合った状態となる。したがって、荷重Ｆの入力後期においては、第一リブ22と、第二リブ32と、第一部材本体部21または第二部材本体部31とが三角形状の断面を有するトラス状の構造Ｓ（二点鎖線に示す）を形成し、第一リブ22と第二リブ32とが支え合い、衝撃吸収構造10のさらなる変形を抑制して、反力を上昇させる。そのため、本実施の形態の場合、反力特性は、図７の実線に示すように、ピーク荷重Ｐ以降も緩やかに推移し、図７の破線に示す特性管理範囲Ｒ内に制御しやすくなる。 Therefore, the tip of the first rib 22 comes close to or abuts the base end of the second rib 32 (long rib 34 or short rib 35), and the tip of the second rib 32 (short rib 35) contacts the first rib 32 (long rib 34 or short rib 35). A second rib 32 (short rib 35) is inserted between the first ribs 22, 22 so as to be close to or in contact with the base end of the rib 22, and the second ribs 32, 32 (between the long rib 34 and the short rib 35) are inserted. , or between the short ribs 35, 35), and the first rib 22 and the second rib 32 are interlocked. Therefore, in the latter stage of the input of the load F, the first rib 22, the second rib 32, and the first member main body portion 21 or the second member main body portion 31 form a truss-like structure S (two ) are formed, and the first rib 22 and the second rib 32 support each other, suppressing further deformation of the shock absorbing structure 10 and increasing the reaction force. Therefore, in the case of the present embodiment, as indicated by the solid line in FIG. 7, the reaction force characteristic gradually changes even after the peak load P, making it easier to control within the characteristic control range R indicated by the broken line in FIG.

これに対し、図５及び図６に示す衝撃吸収構造10aを比較例として挙げる。衝撃吸収構造10aは、第一部材15aと第二部材16aとが空間部17aを介して互いに対向配置され、第一部材15aの第一部材本体部21aの板厚方向に沿って第一リブ22aが突出し、第二部材16aの第二部材本体部31aの板厚方向に沿って第二リブ32a（長リブ34a及び短リブ35a）が突出して、第一リブ22aと第二リブ32a（短リブ35a）との互いの先端部が対向（正対）している。この比較例の場合、図６に示すように第一部材15aに対し車内側から荷重Ｆが加わると、荷重Ｆが所定以上の場合、第一部材15a及び第二部材16aが変形する。このとき、第二部材16aでは、荷重Ｆの入力初期では、第一部材本体部21aに当接する第二リブ32aの長リブ34aが変形することで、荷重Ｆを吸収し、その後、第二リブ32aの短リブ35aと第一リブ22aとが互いにずれて第二部材本体部31a及び第一部材本体部21a側に先端部がそれぞれ近接または当接し、第一リブ22a及び第二リブ32a（短リブ35a）が個々に変形を抑制するため、変形の抑制が不十分である。そのため、比較例の場合、反力特性は、図７の一点鎖線に示すように、ピーク荷重Ｐa以降に反力が大きく減少する。すなわち、比較例の場合、ピーク荷重Ｐa以降の荷重差が大きくなるので、図７の破線に示す特性管理範囲Ｒ内での制御が容易でない。 On the other hand, a shock absorbing structure 10a shown in FIGS. 5 and 6 is taken as a comparative example. In the shock absorbing structure 10a, a first member 15a and a second member 16a are arranged to face each other with a space portion 17a interposed therebetween, and a first rib 22a extends along the plate thickness direction of the first member body portion 21a of the first member 15a. protrudes, the second rib 32a (long rib 34a and short rib 35a) protrudes along the plate thickness direction of the second member main body portion 31a of the second member 16a, and the first rib 22a and the second rib 32a (short rib 35a) are opposed (directly) to each other. In the case of this comparative example, when a load F is applied to the first member 15a from the inside of the vehicle as shown in FIG. At this time, in the second member 16a, at the initial stage of input of the load F, the long rib 34a of the second rib 32a in contact with the first member main body portion 21a deforms to absorb the load F, and then the second rib 16a absorbs the load F. The short rib 35a of 32a and the first rib 22a are displaced from each other, and the tip end portions approach or contact the second member body portion 31a and the first member body portion 21a, respectively, and the first rib 22a and the second rib 32a (short Since the ribs 35a) individually restrain deformation, the restraint of deformation is insufficient. Therefore, in the case of the comparative example, the reaction force characteristic is such that the reaction force is greatly reduced after the peak load Pa as indicated by the dashed line in FIG. That is, in the case of the comparative example, since the load difference after the peak load Pa becomes large, control within the characteristic control range R indicated by the dashed line in FIG. 7 is not easy.

このように、第１の実施の形態によれば、第一部材15の第一リブ22と第二部材16の第二リブ32との少なくとも一方、本実施の形態では第二リブ32（短リブ35）が、これらの他方、本実施の形態では第一リブ22の側面に向かって延びているため、衝突などにより生じる荷重によって第一部材15と第二部材16とが相対的に接近するように変形したときに、第一リブ22と第二リブ32とが互いに違いに重なってトラス状の構造を形成し、第一リブ22と第二リブ32とが支え合うことで急激な変形を抑制できるので、ピーク荷重以降の反力低下を緩やかにすることができる。 Thus, according to the first embodiment, at least one of the first rib 22 of the first member 15 and the second rib 32 of the second member 16, in this embodiment the second rib 32 (short rib) 35) extends toward the side surface of the first rib 22 in this embodiment. The first rib 22 and the second rib 32 overlap each other to form a truss-like structure, and the first rib 22 and the second rib 32 support each other to suppress sudden deformation. Therefore, the decrease in the reaction force after the peak load can be moderated.

しかも、衝撃吸収用の軟質部材などを必要とせず、第一リブ22と第二リブ32との形状や強度を設定するのみで反力を容易に制御可能となる。 Moreover, the reaction force can be easily controlled simply by setting the shape and strength of the first rib 22 and the second rib 32 without requiring a soft member for impact absorption.

また、第一リブ22の先端部と第二リブ32（本実施の形態では短リブ35）の先端部とが、突出方向に対し交差する方向から見て互いにオーバラップしているため、衝突などにより生じる荷重によって第一部材15と第二部材16とが相対的に接近するように変形したときに、第一リブ22，22間及び第二リブ32，32間に第二リブ32（本実施の形態では短リブ35）及び第一リブ22が入り込みやすくなるので、第一リブ22と第二リブ32とが互いに違いに重なってトラス状の構造を容易に形成可能となる。 In addition, since the tip of the first rib 22 and the tip of the second rib 32 (short rib 35 in the present embodiment) overlap each other when viewed from the direction intersecting the projecting direction, collision or the like is prevented. The second rib 32 (this embodiment Since the short ribs 35) and the first ribs 22 can be easily inserted in the configuration of (1), the first ribs 22 and the second ribs 32 can be overlapped with each other to easily form a truss-like structure.

さらに、第一リブ22と第二リブ32とが互いに非接触状態であるため、衝突などにより生じる荷重によって第一部材15と第二部材16とが相対的に接近するように変形したときに、第一リブ22と第二リブ32とが互いの接触により折れたり曲がったりするなどの破損を生じにくくし、トラス状の構造を確実に形成できるとともに、第一リブ22と第二リブ32との接触により不安定な反力が生じることを抑制できる。 Furthermore, since the first rib 22 and the second rib 32 are not in contact with each other, when the first member 15 and the second member 16 are deformed so as to approach each other due to a load caused by collision or the like, The first rib 22 and the second rib 32 are less likely to break or bend due to contact with each other, and the truss-like structure can be reliably formed. It is possible to suppress the occurrence of unstable reaction force due to contact.

また、第一リブ22及び第二リブ32の突出方向が、第一部材本体部21及び第二部材本体部31の板厚方向に対し傾斜しているため、衝突などにより生じる荷重によって第一部材15と第二部材16とが相対的に接近するように変形したときに、第一リブ22と第二リブ32とがトラス状の構造を容易に形成可能となる。 In addition, since the projecting directions of the first rib 22 and the second rib 32 are inclined with respect to the plate thickness direction of the first member main body portion 21 and the second member main body portion 31, the load caused by a collision or the like causes the first member to move. The first rib 22 and the second rib 32 can easily form a truss-like structure when the 15 and the second member 16 are deformed so as to approach each other.

さらに、第一部材15及び第二部材16が、物品を収納するグローブボックス41の開閉用の蓋体42の少なくとも一部を構成しているため、グローブボックス41の蓋体42に乗員の保護機能を容易に持たせることができる。すなわち、衝撃吸収構造10は、グローブボックス41の蓋体42に適用し、乗員の膝部などの保護用として好適に用いることができる。 Furthermore, since the first member 15 and the second member 16 constitute at least a part of the lid body 42 for opening and closing the glove box 41 that stores articles, the lid body 42 of the glove box 41 has an occupant protection function. can be easily held. That is, the shock absorbing structure 10 can be applied to the lid body 42 of the glove box 41, and can be suitably used for protecting the knees of the occupant.

なお、図８及び図９に示す第２の実施の形態のように、第一リブ22及び第二リブ32の第一部材本体部21及び第二部材本体部31の板厚方向に対する傾斜方向は、第１の実施の形態と反対方向となっていてもよい。 As in the second embodiment shown in FIGS. 8 and 9, the inclination direction of the first member main body portion 21 and the second member main body portion 31 of the first rib 22 and the second rib 32 with respect to the plate thickness direction is , the direction opposite to that of the first embodiment.

また、上記の各実施の形態において、第二リブ32（短リブ35）の先端部を第一リブ22の側面に向かって延びるように形成したが、第一リブ22の先端部を第二リブ32（短リブ35）の側面に向かって延びるように形成してもよいし、第一部材15が車外側、第二部材16が車内側となるように配置されていてもよい。 Further, in each of the above embodiments, the tip of the second rib 32 (short rib 35) is formed to extend toward the side surface of the first rib 22, but the tip of the first rib 22 is the second rib. It may be formed so as to extend toward the side surface of 32 (short rib 35), or it may be arranged so that the first member 15 is on the outside of the vehicle and the second member 16 is on the inside of the vehicle.

衝撃吸収構造10は、グローブボックスなどの収納装置の蓋体（リッド）に用いられるものに限られず、ドアなど、車両の任意の箇所に用いてよい。すなわち、衝撃吸収構造10は、乗員の前方に限られず、乗員の側方などに配置されていてもよい。その場合、乗員の被保護部は膝部に限られず、体側部や頭部などでもよい。 The shock absorbing structure 10 is not limited to the one used for the lid of a storage device such as a glove box, and may be used for any part of the vehicle such as the door. That is, the shock absorbing structure 10 is not limited to be placed in front of the occupant, and may be placed on the side of the occupant. In this case, the part to be protected of the occupant is not limited to the knee, but may be the side of the body or the head.

さらに、衝撃吸収構造10は、車両用に限られず、その他の任意の衝撃吸収構造として用いてよい。 Furthermore, the impact absorbing structure 10 is not limited to vehicles, and may be used as any other impact absorbing structure.

本発明は、例えば自動車の前席に臨んで配置されるグローブボックスにおける乗員の膝部の保護用として好適に用いることができる。 INDUSTRIAL APPLICABILITY The present invention can be suitably used, for example, for protecting the knees of an occupant in a glove box arranged facing the front seat of an automobile.

10 衝撃吸収構造
15 第一部材
16 第二部材
21 第一部材本体部
22 第一リブ
31 第二部材本体部
32 第二リブ
41 収納装置としてのグローブボックス
42 蓋体 10 Shock absorbing structure
15 First member
16 Second member
21 First member body
22 First rib
31 Second member body
32 Second rib
41 Glove box as storage device
42 Lid

Claims (5)

第一部材と、
この第一部材に対向して配置される第二部材と、を備え、
前記第一部材は、前記第二部材に向かい突出する第一リブを有し、
前記第二部材は、前記第一部材に向かい突出する第二リブを有し、
前記第一リブと前記第二リブとの少なくとも一方が、前記第一リブと前記第二リブとの他方の側面に向かって延びており、
前記第二リブは、突出長さが異なる複数種のリブより構成されている
ことを特徴とする衝撃吸収構造。 a first member;
a second member arranged opposite to the first member,
The first member has a first rib protruding toward the second member,
The second member has a second rib protruding toward the first member,
at least one of the first rib and the second rib extends toward the other side surface of the first rib and the second rib ;
The second rib is composed of a plurality of types of ribs with different projecting lengths
A shock absorbing structure characterized by: 第一リブの先端部と第二リブの先端部とは、突出方向に対し交差する方向から見て互いにオーバラップしている
ことを特徴とする請求項１記載の衝撃吸収構造。 2. The shock absorbing structure according to claim 1, wherein the tip portion of the first rib and the tip portion of the second rib overlap each other when viewed from a direction intersecting the projecting direction. 第一リブと第二リブとは、互いに非接触状態である
ことを特徴とする請求項１または２記載の衝撃吸収構造。 3. The shock absorbing structure according to claim 1, wherein the first rib and the second rib are in non-contact with each other. 第一部材及び第二部材は、それぞれ板状に形成された第一部材本体部及び第二部材本体部を備え、
第一リブ及び第二リブの突出方向は、前記第一部材本体部及び前記第二部材本体部の板厚方向に対し傾斜している
ことを特徴とする請求項１ないし３いずれか一記載の衝撃吸収構造。 The first member and the second member each have a first member main body portion and a second member main body portion formed in a plate shape,
The projecting direction of the first rib and the second rib is inclined with respect to the plate thickness direction of the first member main body portion and the second member main body portion. Shock absorbing structure. 第一部材及び第二部材は、物品を収納する収納装置の開閉用の蓋体の少なくとも一部を構成している
ことを特徴とする請求項１ないし４いずれか一記載の衝撃吸収構造。 5. The shock absorbing structure according to any one of claims 1 to 4, wherein the first member and the second member constitute at least part of a lid for opening and closing a storage device for storing articles.
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US20010045762A1 (en) 1998-11-30 2001-11-29 Von Holst Hans Arrangement for occupant protection in vehicles
JP2013252763A (en) 2012-06-06 2013-12-19 Nissan Motor Co Ltd Knee protector structure for vehicle
JP2015221656A (en) 2014-05-23 2015-12-10 カルソニックカンセイ株式会社 Lid structure of glove box
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