JP4668669B2 - Automotive interior panels - Google Patents

Automotive interior panels Download PDF

Info

Publication number
JP4668669B2
JP4668669B2 JP2005117296A JP2005117296A JP4668669B2 JP 4668669 B2 JP4668669 B2 JP 4668669B2 JP 2005117296 A JP2005117296 A JP 2005117296A JP 2005117296 A JP2005117296 A JP 2005117296A JP 4668669 B2 JP4668669 B2 JP 4668669B2
Authority
JP
Japan
Prior art keywords
weak
skin
airbag
airbag device
door
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 - Fee Related
Application number
JP2005117296A
Other languages
Japanese (ja)
Other versions
JP2006290298A (en
Inventor
貴博 諏訪間
修司 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nihon Plast Co Ltd
Original Assignee
Nihon Plast Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nihon Plast Co Ltd filed Critical Nihon Plast Co Ltd
Priority to JP2005117296A priority Critical patent/JP4668669B2/en
Publication of JP2006290298A publication Critical patent/JP2006290298A/en
Application granted granted Critical
Publication of JP4668669B2 publication Critical patent/JP4668669B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Air Bags (AREA)
  • Instrument Panels (AREA)

Description

本発明は、エアバッグ装置を内部に搭載した自動車用内装パネルに関する。   The present invention relates to an automobile interior panel having an airbag device mounted therein.

エアバッグ装置は、自動車が衝撃を受けたときにその衝撃を感知してエアバッグを膨張、展開させて車体と乗員との間に介在させ、これによって乗員を保護するというものである。
近年急速に普及し、その配設箇所も運転席用のステアリングホイール、助手席用のインストルメントパネルだけでなく、乗員を側面部の衝撃から保護する側部用エアバッグ車体側部窓上部に配設されるようになった。
これらの中で、インストルメントパネルの下部に配設される助手席用エアバッグ装置においては、それをカバーするエアバッグカバーをインストルメントパネルとは別体として用意し、これをインストルメントパネルに設けた開口部に組みつけるというのが普通であったが、近年ではこれらを一体化してモジュール化して製造、組み立て作業の合理化を図ると共に、内装部品としてのインストルメントパネルの外観を向上させることが要望されている。
The airbag device senses an impact when the automobile receives an impact, inflates and deploys the airbag, and interposes between the vehicle body and the occupant, thereby protecting the occupant.
In recent years, it has spread rapidly, not only the steering wheel for the driver's seat and the instrument panel for the passenger's seat, but also the side airbag on the side of the vehicle body that protects the passengers from the impact on the side. It came to be established.
Among these, in the airbag device for the passenger seat disposed at the lower part of the instrument panel, an airbag cover for covering the airbag device is prepared separately from the instrument panel, and this is provided on the instrument panel. In recent years, there has been a desire to streamline manufacturing and assembly operations by integrating them into modules, and to improve the appearance of instrument panels as interior parts. Has been.

そして、このようにエアバッグカバー体をインストルメントパネルに一体化したものもすでに提案されており、例えば特開平11−291069号公報(特許文献1)に記載のものは、インストルメントパネルをエアバッグ用開口部を設けずに射出成形し、このパネル裏面のエアバッグ収納位置に対応する箇所にレーザー加工を施し破断予定線を形成するというものである。
また、このようにパネル成形後にエアバッグカバー体を展開するための破断予定線を後加工することなく、成形時にこの破断予定線も形成するという成形方法の提案もされている(特開2002−234413号公報、特許文献2)。
さらに、硬質材料からなるハードインパネに破断予定線を成形時に加工する際、その加工に針状ピンを備えたブロックをキャビティ内に進退させ、かつ破断予定線加工面のブロック温度よりも反対側の金型温度を高めてブロック押圧跡の表面に現れるのを防止する成形方法も提案されている(特開2003−146171号公報、特許文献3)。
And what has integrated the airbag cover body in the instrument panel in this way has already been proposed, for example, the thing of Unexamined-Japanese-Patent No. 11-291069 (patent document 1) is an instrument panel. In this method, injection molding is performed without providing an opening, and laser processing is performed at a position corresponding to the airbag storage position on the back surface of the panel to form a planned fracture line.
In addition, there has also been proposed a molding method in which a planned fracture line is formed at the time of molding without post-processing the planned fracture line for deploying the airbag cover body after panel formation (Japanese Patent Laid-Open No. 2002-2002). No. 234413, Patent Document 2).
Furthermore, when a planned break line is processed in a hard instrument panel made of a hard material, a block having a needle pin is advanced and retracted into the cavity for the processing, and the block temperature on the side opposite to the block temperature of the planned break line processing surface is moved. A molding method has also been proposed in which the mold temperature is raised to prevent the block pressing trace from appearing on the surface (Japanese Patent Laid-Open No. 2003-146171, Patent Document 3).

しかしながら、前者の破断予定線を後加工する方法は、このためのレーザー加工機を必要とする上に、成形後に微妙な加工作業を要する等コスト的にも、生産性の観点からも問題がある。
また、後者の成形方法は、後加工を要しない点で合理的な方法であるが、成形型内に破断予定線を形成するためのコアを進退自在に設けることが必要であり、金型も複雑となり、また成形方法も煩雑となる。
However, the former method of post-processing the expected fracture line requires a laser processing machine for this purpose, and also has a problem from the viewpoint of productivity, such as requiring subtle processing operations after molding. .
In addition, the latter molding method is a rational method in that no post-processing is required, but it is necessary to provide a core for forming a planned fracture line in the molding die so that it can be moved forward and backward. It becomes complicated and the molding method becomes complicated.

また、インストルメントパネルは、内装部品であるので、その外観や触感も重要である。そのため、このパネルの表面層を軟質でソフト感のある材料で構成し、これを基材層の上に積層した構造のものも各種提案されている。また、この表面層をスキン層、発泡層、およびバリア層からなる表皮として、これをインサートして、基材層をインサート成形するという方法も提案されている(特開2000−16216号公報、特許文献4)。
この破断予定部は、基材層の表面側から表皮のバリア層に延びる切除部により構成され、かつスキン層の対応部には、スキン層を破断可能とする孔が設けられている。
特開平11−291069号公報 特開2002−234413号公報 特開2003−146171号公報 特開2000−16216号公報
In addition, since the instrument panel is an interior part, its appearance and touch are also important. For this reason, various types have been proposed in which the surface layer of the panel is made of a soft and soft material and is laminated on the base material layer. In addition, a method has been proposed in which the surface layer is used as a skin layer, a foam layer, and a barrier layer, and this is inserted to insert a base material layer (Japanese Patent Laid-Open No. 2000-16216, patent) Reference 4).
The planned rupture portion is constituted by a cut portion extending from the surface side of the base material layer to the barrier layer of the epidermis, and a corresponding portion of the skin layer is provided with a hole capable of breaking the skin layer.
JP-A-11-291069 JP 2002-234413 A JP 2003-146171 A JP 2000-16216 A

インストルメントパネルのような自動車用内装部材に一体化されるエアバッグカバーにおいては、その外観、触感は重要である。
そのため、エアバッグカバーがクッション層を備えた構造であるものが望ましい。しかし、クッション層を備えた表皮を有するエアバッグカバーでは、その破断をスムースにするために表皮側にも破断予定部対応位置に表皮成形後前記に示したように、孔加工を要し、生産性に問題がある上に、微小な孔とはいえ、表皮に孔が存在することは、外観上も問題である。
In an airbag cover integrated with an automobile interior member such as an instrument panel, its appearance and feel are important.
Therefore, it is desirable that the airbag cover has a structure having a cushion layer. However, in the airbag cover having a skin with a cushion layer, in order to make the break smooth, the skin side also needs to be drilled as shown above after molding the skin in the position corresponding to the planned fracture portion, as described above. In addition to having a problem with the properties, the presence of pores in the epidermis is a problem in appearance even though they are minute holes.

本発明は、こうした状況の下、孔加工を要しないソフト感のある表皮とクッション層を備えた触感、外観共に優れた、エアバッグ装置をその内部に一体化した自動車用内装パネルであって、かつ、エアバッグ装置の作動時には破断予定線に沿って確実に破断することができ、安全装置としての信頼性の高い自動車用内装パネルを提供することを目的とするものである。   Under such circumstances, the present invention is an automotive interior panel in which an air bag device is integrated therein, which is excellent in tactile sensation and appearance with a soft skin and cushion layer that do not require hole processing, In addition, an object of the present invention is to provide an automobile interior panel that can be reliably broken along a planned break line when the airbag device is operated and has high reliability as a safety device.

本発明者らは、鋭意検討した結果、まず表皮の構成として、軟質表皮のクッション層側に、エアバッグ作動時にパネルがスムースに破断するように所定の形状の弱部を形成すれば、上記目的に適うものであることを知見し、本発明に至った。   As a result of diligent study, the present inventors have first formed the above-described object by forming a weak portion of a predetermined shape on the cushion layer side of the soft skin so that the panel is smoothly broken when the airbag is operated. As a result, the present invention has been found.

すなわち、本発明は、
(1) 収納されたエアバッグを組み込んだエアバッグ装置のエアバッグ膨出方向を覆いエアバッグの展開によって扉部を形成する破断予定部をエアバッグ装置に面する側に形成された自動車用内装パネルであって、
エアバッグ装置側に配置される硬質樹脂製の基材層と、該基材層に積層されるクッション層と、該クッション層にさらに積層される軟質ポリウレタン樹脂製の表皮を有し、
表皮には、前記扉部を形成する破断予定部を構成する弱部が設けられ、
この弱部は、エアバッグ装置に対向する側に連続溝状に開口して形成した第1の弱部と、この第1の弱部の溝底に凹陥して形成した第2の弱部とよりなり、前記第1の弱部の縁部の少なくとも一側に沿って隆起部が形成され、前記隆起部は、第1の弱部の側壁の上縁側を最高点として第1の弱部の外側に向けて高さを漸減するスロープ部を有し、かつ前記弱部は一の方向から交差方向に屈曲する屈曲部を有し、前記隆起部は少なくとも屈曲部における交差外周側に形成され、前記扉部は表皮一般部を含むことを特徴とする自動車用内装パネル、
に関する。
That is, the present invention
(1) An interior for an automobile in which a portion to be broken that covers the airbag inflating direction of an airbag device incorporating a stored airbag and forms a door portion by deployment of the airbag is formed on the side facing the airbag device. A panel,
A hard resin base material layer disposed on the airbag device side, a cushion layer laminated on the base material layer, and a soft polyurethane resin skin further laminated on the cushion layer;
The skin is provided with a weak portion that constitutes the planned break portion that forms the door portion ,
The weak part is a first weak part formed by opening in a continuous groove shape on the side facing the airbag device, and a second weak part formed by being recessed in the groove bottom of the first weak part. Ri more Na, the raised portion along at least one side edge of the first weak portion is formed, the ridge, the first weak portion and the upper edge of the side wall of the first weak portion as the highest point And the weak portion has a bent portion that bends in a cross direction from one direction, and the raised portion is formed at least on the outer periphery side of the cross in the bent portion. , The door part includes an outer skin general part, an automobile interior panel,
About.

本発明によれば、その内部にエアバッグ装置を一体化した自動車用内装パネルにおいてその表皮として、成形後孔加工しない軟質のポリウレタンからなる表皮を設け、かつその下部にクッション層を有することから、外観、触感共に優れたパネルとすることができ、しかもエアバッグ装置の作動時には、表皮のエアバッグ装置側に連続溝状に開口して形成された第1の弱部と、この第1の弱部の溝底に凹陥して形成した第2の弱部からなる弱部を設けたので、エアバッグ作動時には破断予定部位を越えて破断することなく、その部位に沿って想定どおりにスムースに破断することができ、信頼性が高い自動車用内装パネルを得ることができる。
その一方、軟質で、薄く、強度が小さい表皮にあって、その下側にあるクッション層によるソフト感を得ながら、乗員の弱部への押圧力などによっては容易に破断することがないので、通常時に、その弱部によって、表皮が損傷する懸念はなく、また乗員が直接触れてもその弱部の存在を感じることもなく、加えて、前記クッション層が表皮の弱部内部に延設している場合には、表皮に設けた弱部によりパネル表面へ視覚的な影響が及ぶこともない。したがって、感触的にも、また視覚的にも内装パネルの一般部と全く融和した優れた表面外観を得ることができる。
また、好ましくは第1の弱部の側壁の上縁側を最高点として第1の弱部の外側に向けて高さを漸減するスロープ部を有するよう形成した隆起部により、クッション層を介在させたパネルにあっても弱部に安定して破断の応力が加わるとともに、弱部を外れて破断が伝播することがなくなる。さらに表面外観も弱部の近傍とその周縁部に至る箇所で肉厚が緩やかな変化にとどめられ、成形時における外観不良の発生を抑制することができる。
According to the present invention, in the interior panel for automobiles in which the airbag device is integrated therein, as the skin, a skin made of soft polyurethane that is not hole-processed after molding is provided, and a cushion layer is provided in the lower part thereof. The panel can be excellent in appearance and touch, and when the airbag device is in operation, the first weak portion formed by opening a continuous groove on the airbag device side of the skin, and the first weak portion Because the weak part consisting of the second weak part formed by recessing the groove bottom of the part is provided, it breaks smoothly as expected along the part without breaking beyond the planned breakage part when the airbag is activated Therefore, a highly reliable automobile interior panel can be obtained.
On the other hand, because it is soft, thin and has a low strength skin, it does not break easily depending on the pressing force to the weak part of the occupant while obtaining a soft feeling by the cushion layer below it, During normal times, there is no concern that the skin will be damaged by the weak part, and even if the passenger touches it directly, there is no feeling of the weak part. In addition, the cushion layer extends inside the weak part of the skin. In such a case, the panel surface is not visually affected by the weak part provided in the epidermis. Therefore, it is possible to obtain an excellent surface appearance that is completely compatible with the general part of the interior panel both in terms of feeling and visual.
Preferably, the cushion layer is interposed by a raised portion formed so as to have a slope portion that gradually decreases in height toward the outside of the first weak portion with the upper edge side of the side wall of the first weak portion as the highest point. Even in the panel, the breaking stress is stably applied to the weak portion, and the break does not propagate beyond the weak portion. Furthermore, the surface appearance is also limited to a gradual change in the thickness in the vicinity of the weak part and the peripheral part, and the occurrence of poor appearance during molding can be suppressed.

本発明の自動車用内装パネルは、上記のように、基材層とその上に積層されたクッション層、およびさらにその上に積層された表皮から構成されている。
基材層は、好ましくは厚み2.5〜4.0mmで、比較的硬質な材料、例えばポリプロピレンをタルクなどで補強したPPC樹脂から射出成形法で成形されることが好ましい。硬質な材料としては、ポリカーボネートとABS樹脂との複合樹脂(ポリマーアロイ)、マレイミド系樹脂(SMA)、変性ポリフェニレンオキサイド(mPPO)などの樹脂から適宜選択できる。また、その上に積層されるクッション層は、好ましくは厚み5〜8mmで、発泡材料、例えばポリウレタン発泡材を使用して反応射出成形法で成形することが好ましい。
さらにその上に積層される表皮は、触感も良好な軟質のポリウレタン材料で構成され、その厚みは一般部で0.5〜1.0mm、第1の弱部における厚みは、1.0〜2.5mm、好ましくは1.5mm程度、溝幅は1.0〜2.5mm、好ましくは2.0mm程度、第2の弱部における厚みは0.2mm〜0.5mm程度、幅または径を0.7〜2.5mm、好ましくは1.0mm程度の長溝および/または複数の孔とするのが好ましい。また、本発明のより好ましい態様において設けられる隆起部は、一般部からの高さを好ましくは1.0〜3.0mm、より好ましくはおよそ2.0mmとし、またその頂上部の幅は2.5mm〜6.0mmが好ましい。表皮は、このように薄く、ことに破断予定部位においては非常に薄い構造となっているので、ポリウレタン樹脂材料は、流動性の大きい低粘度の材料が好ましく、また、成形後の収縮が小さいものが好ましい。そして、このような材料を使用して、射出成形もしくは反応射出成形法で成形されることが好ましい。前記クッション層の成形は、基材層と表皮を金型内にインサートしてその間に注入されて成形されるが、その際に表皮の凹部の内部にも充填されてクッション層がそこに延設されるのも好ましい。このことにより、表皮外観に前記凹部による影響が及ぶことを防止することができる。
As described above, the automobile interior panel of the present invention includes the base material layer, the cushion layer laminated thereon, and the skin laminated thereon.
The base material layer preferably has a thickness of 2.5 to 4.0 mm, and is preferably formed by injection molding from a relatively hard material, for example, PPC resin reinforced with polypropylene by talc or the like. The hard material can be appropriately selected from resins such as a composite resin (polymer alloy) of polycarbonate and ABS resin, maleimide resin (SMA), and modified polyphenylene oxide (mPPO). Moreover, the cushion layer laminated | stacked on it becomes like this. Preferably it is 5-8 mm in thickness, and it is preferable to shape | mold by a reaction injection molding method using a foaming material, for example, a polyurethane foam.
Furthermore, the skin layered thereon is made of a soft polyurethane material having good tactile sensation, the thickness is 0.5 to 1.0 mm in the general part, and the thickness in the first weak part is 1.0 to 2 0.5 mm, preferably about 1.5 mm, the groove width is 1.0 to 2.5 mm, preferably about 2.0 mm, the thickness at the second weak part is about 0.2 mm to 0.5 mm, and the width or diameter is 0. It is preferable to use a long groove and / or a plurality of holes of about 7 to 2.5 mm, preferably about 1.0 mm. Further, the raised portion provided in a more preferred embodiment of the present invention preferably has a height from the general portion of 1.0 to 3.0 mm, more preferably about 2.0 mm, and the top width is 2. 5 mm to 6.0 mm is preferable. The skin is thin in this way, and in particular, it has a very thin structure at the site where it is expected to break. Therefore, the polyurethane resin material is preferably a low-viscosity material with high fluidity and a small shrinkage after molding. Is preferred. And it is preferable to shape | mold by such an injection molding or reaction injection molding method using such a material. The cushion layer is formed by inserting the base material layer and the skin into the mold and injecting them between them, and filling the inside of the concave portion of the skin, and the cushion layer extends there It is also preferred that As a result, the skin appearance can be prevented from being affected by the recess.

また、破断予定部が交差する部位では、第2の弱部は交差部位において連続して形成されることがスムースに破断させるために好ましい。
本発明においては、スムースな破断をより一層確実にするため、前記弱部の屈曲部に隆起部を設けて、軟質で、薄く、強度の小さい表皮が破断予定線を構成する弱部を越えて破断し予定部外の領域まで破断する懸念をより一層払拭することが好ましい。したがって、隆起部は、表皮の弱部のすべてに沿って、その片側にまたは両側に設けてもよいが、破断部位に予定外のずれがより生じるおそれのある領域、例えば破断予定線が交差する部分(屈曲部)の交差外周側に重点的に設けるとよい。
破断予定部をこのような構造とすることにより、中間層にクッション層を有し、かつ、薄く、強度が小さい表皮を含む3層構造のパネルであっても、エアバッグ装置の作動時に下方から膨出しようとするエアバッグの押し上げにより、破断予定部を越えて開裂することはなく、スムースなエアバッグの展開を可能にすることができる。
前記隆起部は、表皮の表面外観の向上にも寄与することができる。すなわち、破断時の想定外領域へのずれが防止できる結果、凹部以外の一般部を一層薄く構成することができ、これにより、外観、触感を一層ソフトな感じに仕上げることができる。
この弱部は、エアバッグカバーの扉部の形状に従い、片開き扉の場合にはコの字型、両開き扉の場合にはH型の形に設けることができる。
In addition, it is preferable that the second weak portion is continuously formed at the intersecting portion at the portion where the planned break portions intersect, in order to smoothly break the portion.
In the present invention, in order to further ensure smooth rupture, a raised portion is provided at the bent portion of the weak portion, and the soft, thin, low-strength skin exceeds the weak portion constituting the planned rupture line. It is preferable to further wipe away the fear of breaking to the area outside the planned portion. Therefore, the bulge may be provided on one side or both sides along all of the weak parts of the epidermis, but the region where the unscheduled shift may occur more at the rupture site, for example, the planned rupture line intersects. It is good to provide intensively on the crossing outer periphery side of a part (bending part).
By adopting such a structure for the portion to be ruptured, a panel having a three-layer structure including a cushion layer in the intermediate layer and a thin and low-strength skin can be viewed from below when the airbag device is operated. By pushing up the airbag to be inflated, the airbag does not break beyond the planned break portion, and the airbag can be smoothly deployed.
The raised portion can also contribute to improving the surface appearance of the epidermis. That is, as a result of preventing the shift to the unexpected region at the time of breakage, the general portion other than the concave portion can be made thinner, and thereby the appearance and touch can be finished to a softer feeling.
This weak portion can be provided in a U-shape in the case of a single door, or in an H shape in the case of a double door, according to the shape of the door portion of the airbag cover.

以下に、本発明の実施例を図面に基づき説明する。
図1は、エアバッグ装置が一体化された自動車用内装パネルであるインストルメントパネル用アッパパネルの斜視図である。図2は、図1パネルの裏面説明図である。また、図3は、図1のパネルの表皮層の裏面の構造を説明するもので、それぞれエアバッグを展開する両開き扉(図3左側)、および片開き扉(図3右側)を意図したものである。また、図4は図2中のA−A線断面説明図であり、図5は、図2中、B−B線断面説明図である。また、図6は、表皮の裏面に設けた凹部(破断予定弱部)を説明する平面図であり、図7は、図6中のX−X線部位での断面説明図である。さらに図8は、図6対応位置での変形例を示す説明図である。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of an upper panel for an instrument panel, which is an automobile interior panel in which an airbag device is integrated. FIG. 2 is an explanatory view of the back surface of the panel shown in FIG. FIG. 3 illustrates the structure of the back surface of the skin layer of the panel of FIG. 1, which is intended for a double door (left side in FIG. 3) and a single door (right side in FIG. 3) for deploying an airbag, respectively. It is. 4 is a sectional view taken along line AA in FIG. 2, and FIG. 5 is a sectional view taken along line BB in FIG. FIG. 6 is a plan view for explaining a concave portion (a weak portion to be broken) provided on the back surface of the skin, and FIG. 7 is a cross-sectional explanatory view taken along the line XX in FIG. Further, FIG. 8 is an explanatory view showing a modification at the position corresponding to FIG.

これらの図において、1は自動車用内装パネル本体、2は軟質樹脂インナー部材(扉部の支持部材)、3は扉部、4は扉補強部、5はヒンジ部、6は表皮破断予定線、7は隙間部、8は薄肉ヒンジ部、9は基材層の弱部、10は接合部、11はリテーナ固定穴、12は外周縁部、13は軟質ポリウレタン表皮、14は硬質樹脂基材層、15はクッション層、16は不連続凹部、17は連続凹部、18は隆起部を示す。   In these drawings, 1 is an automotive interior panel body, 2 is a soft resin inner member (a support member for a door part), 3 is a door part, 4 is a door reinforcing part, 5 is a hinge part, and 6 is a skin rupture line. 7 is a gap portion, 8 is a thin hinge portion, 9 is a weak portion of the base material layer, 10 is a joint portion, 11 is a retainer fixing hole, 12 is an outer peripheral edge portion, 13 is a soft polyurethane skin, and 14 is a hard resin base material layer , 15 is a cushion layer, 16 is a discontinuous recess, 17 is a continuous recess, and 18 is a raised portion.

この実施例では、凹部は破断予定線となる全域に孔部として設けた。但し、破断予定線が交差する部位では連続溝とした。前記孔は0.5mmφで孔の間隔は0.3mmとした。
図1に示すパネルの製造は、まず表皮をその破断予定部の構造に対応した金型を使用する射出成形あるいは反応射出成形法により成形する。
ポリウレタン材料としては、本発明の表皮は、非常に薄い部分を有するので、流動性の高い例えば充填時の粘度で500〜1000センチポアズのポリウレタン材料を使用することが好ましい。また、成形後の収縮率もできるだけ小さい例えば一万分の3〜8程度の成形材料が好ましい。また、スムースな開裂のため、表皮は比重0.8以上で、無発泡もしくは微発泡で、引張り荷重70kgf/cm以下の特性を有することが好ましい。
In this embodiment, the concave portion is provided as a hole in the entire region that is a planned fracture line. However, continuous grooves were formed at the portions where the planned fracture lines intersect. The holes were 0.5 mmφ and the distance between the holes was 0.3 mm.
In the manufacture of the panel shown in FIG. 1, first, the skin is formed by an injection molding or reaction injection molding method using a mold corresponding to the structure of the planned fracture portion.
As the polyurethane material, since the skin of the present invention has a very thin portion, it is preferable to use a polyurethane material having high fluidity, for example, a viscosity of 500 to 1000 centipoise in filling. Further, a molding material having a shrinkage rate after molding as small as possible, for example, about 3 to 1 / 10,000 is preferable. For smooth cleavage, the skin preferably has a specific gravity of 0.8 or more, non-foaming or fine foaming, and a tensile load of 70 kgf / cm or less.

基材層は、前記のように例えばタルクを充填したポリプロピレンから射出成形により製造する。基材層の弱部は、その成形時に設けてもよく、また、成形後当該部位を切除して設けてもよい。次いで、これらの表皮と基材層を金型内にインサートしてこの部材の間にポリウレタン発泡材料を反応射出成形法により充填して図1に示す自動車用内装パネルを成形することができる。
なお、図1中に示す、エアバッグ装置を収納する軟質インナー部材は、その扉補強部とその外周縁部において溶着用リブによりパネル本体と振動溶着にて接合されている。
As described above, the base material layer is manufactured by injection molding from, for example, polypropylene filled with talc. The weak part of a base material layer may be provided at the time of the shaping | molding, and the part concerned may be excised after shaping | molding. Next, the skin and the base material layer are inserted into a mold, and a polyurethane foam material is filled between the members by a reaction injection molding method to form the automobile interior panel shown in FIG.
In addition, the soft inner member which accommodates an airbag apparatus shown in FIG. 1 is joined with the panel main body by vibration welding in the door reinforcement part and the outer periphery part by the welding rib.

図9は図8の構造に類似の破断予定部構造を採用したパネル表皮20の単体斜視図で、一部切り欠いて破断予定部の横断面形状を示している。パネル表皮20は射出反応成形法によるポリウレタン樹脂製であって、一般表皮部21は厚み1.0mm、略H字状をなす破断予定部22は溝部23の底部に直径1.0mmφの円筒状をなす穴24が多数配列して形成されている。また穴24の配列の中に連続溝27がある。この連続溝27は破断予定部の屈曲点(交差点)39に配置されるときは、平面略T字状の連続溝27aに、中間部分では同I字状の連続溝27bになっている。   FIG. 9 is a single perspective view of a panel skin 20 that adopts a structure to be broken similar to the structure of FIG. 8 and shows a cross-sectional shape of the part to be broken with a part cut away. The panel skin 20 is made of polyurethane resin by an injection reaction molding method. The general skin portion 21 has a thickness of 1.0 mm, and the to-be-broken portion 22 having a substantially H shape has a cylindrical shape with a diameter of 1.0 mmφ at the bottom of the groove portion 23. A large number of holes 24 are formed and formed. There is a continuous groove 27 in the array of holes 24. When the continuous groove 27 is disposed at a bending point (intersection) 39 of the planned fracture portion, it is a continuous groove 27a having a substantially T-shape in a plane, and an I-shaped continuous groove 27b in the middle portion.

図10は図9のY部断面、すなわち破断予定部22のH字の横断面を示している。溝部23の深さは1.5mm、その底部の厚みは1.5mmとし、その底部に設けた穴24の底部の厚みは0.5mmとしたが、0.3mm〜0.8mmなどの範囲で、また破断予定部の中央部分と両サイド部分と小さなL字状をなす端末部分22dなどで底部の厚みを変化させるようにしてもよい。本図示の例では、H字の中央横断部分22cと両サイド部分22a、22bでは底部の厚みを0.5mmとし、端末部分22dでは0.7mmとしてある。   FIG. 10 shows a cross-section of the Y part in FIG. The depth of the groove 23 is 1.5 mm, the thickness of the bottom is 1.5 mm, and the thickness of the bottom of the hole 24 provided in the bottom is 0.5 mm, but in the range of 0.3 mm to 0.8 mm, etc. Further, the thickness of the bottom portion may be changed by a small L-shaped terminal portion 22d and the like at the center portion and both side portions of the planned fracture portion. In the example shown in the figure, the thickness of the bottom of the H-shaped central transverse portion 22c and the side portions 22a and 22b is 0.5 mm, and the end portion 22d is 0.7 mm.

隆起部30は、溝部23の側壁28の上縁部28aから水平方向に例えば4.0mm幅でフラット部25を形成し、そこから一般表皮部21に向けて高さを漸減させるスロープ部26を形成している。このスロープ部26の斜面の長さは適宜選択できるが、例えば15mm程度とする。すなわち、フラット部25の厚みは3.0mmで、このフラット部の端からスロープ部26は一般表皮部21との高さの差2.0mmを15mmの斜辺長によって緩やかに結んである。   The raised portion 30 forms a flat portion 25 with a width of, for example, 4.0 mm in the horizontal direction from the upper edge portion 28 a of the side wall 28 of the groove portion 23, and a slope portion 26 that gradually decreases in height toward the general skin portion 21 therefrom. Forming. Although the length of the slope of this slope part 26 can be selected suitably, it shall be about 15 mm, for example. That is, the thickness of the flat portion 25 is 3.0 mm, and the slope portion 26 from the end of the flat portion is gently connected with a height difference of 2.0 mm from the general skin portion 21 by an oblique side length of 15 mm.

このようにしたので、表面外観に裏面側の造形が現れにくくなるとともに、溝部23と穴24を成形する金型の凹凸の形状によって破断予定部そのものは成形時に金型によって位置および形状が規制されるが、フラット部25からスロープ部26にかけては位置及び形状の規制が破断予定部よりも緩やかになるので、破断予定部の成形歪が緩和され、金型からの取り出し(離型、脱型)もしやすくなる。したがって、後に続くクッション層の成形工程への受け渡しも容易になり、全体として高度な外観品質を量産レベルで実現することに大きく寄与でき、生産性や歩留まりを向上させ製造コストを低減できる。   Since it did in this way, it becomes difficult for the modeling of the back surface side to appear on the surface appearance, and the position and shape of the planned fracture portion itself are regulated by the mold at the time of molding due to the uneven shape of the mold for molding the groove 23 and the hole 24. However, since the position and shape of the regulation from the flat part 25 to the slope part 26 are gentler than the part to be ruptured, the molding distortion of the part to be rupture is alleviated and taken out from the mold (mold release, mold release). It will be easier. Therefore, the subsequent transfer to the molding process of the cushion layer is facilitated, making it possible to greatly contribute to realizing high-quality appearance as a whole at the mass production level, improving productivity and yield, and reducing manufacturing costs.

隆起部30の設定箇所としては、破断予定部22の全長に亘るようにしたが、少なくとも屈曲点39の箇所、とりわけ屈曲点39のターンの外周側に設けるのが、安定して所望の破断を生起させる上で好ましい。また、フラット部25を屈曲点39およびその近傍で高く、他の箇所で漸次低くする、あるいはフラット部25の幅を屈曲点39およびその近傍で広くとり、他の箇所で適宜狭くするあるいはゼロにすることなどもできる。   The set portion of the bulge 30 extends over the entire length of the planned fracture portion 22, but at least at the location of the bending point 39, particularly at the outer peripheral side of the turn of the bending point 39, the desired rupture can be stably achieved. It is preferable in generating. Further, the flat portion 25 is high at the bending point 39 and the vicinity thereof, and is gradually lowered at other portions, or the flat portion 25 is widened at the bending point 39 and the vicinity thereof, and is appropriately narrowed at other portions or zero. You can also do it.

本発明のエアバッグ装置を一体化した自動車用内装パネルの斜視図。The perspective view of the interior panel for motor vehicles which integrated the airbag apparatus of this invention. 図1の裏面の説明図。Explanatory drawing of the back surface of FIG. 本発明の自動車用内装パネルにおける表皮の裏面説明図。The back surface explanatory drawing of the skin in the interior panel for motor vehicles of this invention. 図2A−A線断面説明図。FIG. 2A-A sectional explanatory drawing. 図2B−B線断面説明図。FIG. 2B-B line sectional explanatory drawing. 表皮の裏面に設けた凹部(破断予定弱部)を説明する平面図。The top view explaining the recessed part (fracture plan weak part) provided in the back surface of an outer skin. 図6中のX−X線部位での断面説明図。Cross-sectional explanatory drawing in the XX line site | part in FIG. 図6対応位置での変形例を示す説明図。Explanatory drawing which shows the modification in the position corresponding to FIG. 本発明の自動車用内装パネルにおける表皮の単体斜視図。The single-piece | unit perspective view of the outer skin in the interior panel for motor vehicles of this invention. 図9のY−Y線部位での断面説明図。Cross-sectional explanatory drawing in the YY line | wire site | part of FIG.

Claims (1)

収納されたエアバッグを組み込んだエアバッグ装置のエアバッグ膨出方向を覆いエアバッグの展開によって扉部を形成する破断予定部をエアバッグ装置に面する側に形成した自動車用内装パネルであって、
エアバッグ装置側に配置される硬質樹脂製の基材層と、該基材層に積層されるクッション層と、該クッション層にさらに積層される軟質ポリウレタン樹脂製の表皮を有し、
表皮には、前記扉部を形成する破断予定部を構成する弱部が設けられ、
この弱部は、エアバッグ装置に対向する側に連続溝状に開口して形成した第1の弱部と、この第1の弱部の溝底に凹陥して形成した第2の弱部とよりなり、 前記第1の弱部の縁部の少なくとも一側に沿って隆起部が形成され、前記隆起部は、第1の弱部の側壁の上縁側を最高点として第1の弱部の外側に向けて高さを漸減するスロープ部を有し、かつ前記弱部は一の方向から交差方向に屈曲する屈曲部を有し、前記隆起部は屈曲部における少なくとも交差外周側に形成され、前記扉部は表皮一般部を含むことを特徴とする自動車用内装パネル。
An automotive interior panel in which a planned breakage portion that covers the airbag inflating direction of an airbag device incorporating a stored airbag and forms a door portion by deployment of the airbag is formed on the side facing the airbag device. ,
A hard resin base material layer disposed on the airbag device side, a cushion layer laminated on the base material layer, and a soft polyurethane resin skin further laminated on the cushion layer;
The skin is provided with a weak portion that constitutes the planned break portion that forms the door portion ,
The weak part is a first weak part formed by opening in a continuous groove shape on the side facing the airbag device, and a second weak part formed by being recessed in the groove bottom of the first weak part. Ri more Na, the raised portion along at least one side edge of the first weak portion is formed, the ridge, the first weak portion and the upper edge of the side wall of the first weak portion as the highest point And the weak portion has a bent portion that bends in the cross direction from one direction, and the raised portion is formed at least on the outer periphery side of the bent portion. The door part includes an outer skin general part .
JP2005117296A 2005-04-14 2005-04-14 Automotive interior panels Expired - Fee Related JP4668669B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005117296A JP4668669B2 (en) 2005-04-14 2005-04-14 Automotive interior panels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005117296A JP4668669B2 (en) 2005-04-14 2005-04-14 Automotive interior panels

Publications (2)

Publication Number Publication Date
JP2006290298A JP2006290298A (en) 2006-10-26
JP4668669B2 true JP4668669B2 (en) 2011-04-13

Family

ID=37411333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005117296A Expired - Fee Related JP4668669B2 (en) 2005-04-14 2005-04-14 Automotive interior panels

Country Status (1)

Country Link
JP (1) JP4668669B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019126901A1 (en) * 2019-10-07 2021-04-08 StreetScooter GmbH Airbag flap system with edge depressions of different material thickness
IT202000015523A1 (en) * 2020-06-26 2021-12-26 Ferrari Spa COVER PANEL FOR A VEHICLE COMPARTMENT AND PROVIDED WITH A WEAKENING FOR THE OPENING OF AN UNDERLYING AIRBAG

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04151345A (en) * 1990-09-18 1992-05-25 Inoac Corp Manufacture of automotive air bag door skin
JPH08282332A (en) * 1995-04-17 1996-10-29 Toyo Tire & Rubber Co Ltd Facing of instrument panel for air bag and molding method therefor
JPH09301013A (en) * 1996-03-15 1997-11-25 Inoac Corp Structure for car interior side member integrally having air bag door
JPH10250520A (en) * 1997-03-07 1998-09-22 Toyo Tire & Rubber Co Ltd Instrument panel for air bag device
JPH11115669A (en) * 1997-10-14 1999-04-27 Toyo Tire & Rubber Co Ltd Instrument panel for air bag
JPH11291069A (en) * 1998-04-10 1999-10-26 Honda Motor Co Ltd Method for processing instrument panel with lid for air bag
JPH11301398A (en) * 1998-04-15 1999-11-02 Toyota Motor Corp Vehicular trimming member having air bag door part
JP2000016216A (en) * 1998-07-03 2000-01-18 Toyoda Gosei Co Ltd Manufacture of instrument panel
JP2000264159A (en) * 1999-03-19 2000-09-26 Nippon Plast Co Ltd Manufacture of air bag cover
JP2001106009A (en) * 1999-10-04 2001-04-17 Toyo Tire & Rubber Co Ltd Instrument panel surface material and its manufacturing method
JP2002234413A (en) * 2000-12-06 2002-08-20 Daihatsu Motor Co Ltd Method of molding airbag cover body
JP2002264757A (en) * 2001-03-13 2002-09-18 Nishikawa Kasei Co Ltd Surface material of air bag door
JP2002347557A (en) * 2001-05-28 2002-12-04 Mitsuboshi Belting Ltd Air bag door integrated type instrument panel
JP2003146171A (en) * 2001-11-12 2003-05-21 Toyoda Gosei Co Ltd Manufacturing method of interior equipment body of automobile
JP2003237516A (en) * 2002-02-20 2003-08-27 Inoac Corp Surface skin and its molding method
JP2005022453A (en) * 2003-06-30 2005-01-27 Takata Corp Air bag cover and air bag module
JP2005104307A (en) * 2003-09-30 2005-04-21 Nippon Plast Co Ltd Air bag cover
JP2005104319A (en) * 2003-09-30 2005-04-21 Nippon Plast Co Ltd Interior panel for automobile
JP2005153637A (en) * 2003-11-21 2005-06-16 Inoac Corp Skin material and forming method thereof
JP2006290305A (en) * 2005-04-14 2006-10-26 Nippon Plast Co Ltd Interior panel for automobile

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006065750A1 (en) * 2004-12-14 2006-06-22 Johnson Controls Technology Company Air bag cover

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04151345A (en) * 1990-09-18 1992-05-25 Inoac Corp Manufacture of automotive air bag door skin
JPH08282332A (en) * 1995-04-17 1996-10-29 Toyo Tire & Rubber Co Ltd Facing of instrument panel for air bag and molding method therefor
JPH09301013A (en) * 1996-03-15 1997-11-25 Inoac Corp Structure for car interior side member integrally having air bag door
JPH10250520A (en) * 1997-03-07 1998-09-22 Toyo Tire & Rubber Co Ltd Instrument panel for air bag device
JPH11115669A (en) * 1997-10-14 1999-04-27 Toyo Tire & Rubber Co Ltd Instrument panel for air bag
JPH11291069A (en) * 1998-04-10 1999-10-26 Honda Motor Co Ltd Method for processing instrument panel with lid for air bag
JPH11301398A (en) * 1998-04-15 1999-11-02 Toyota Motor Corp Vehicular trimming member having air bag door part
JP2000016216A (en) * 1998-07-03 2000-01-18 Toyoda Gosei Co Ltd Manufacture of instrument panel
JP2000264159A (en) * 1999-03-19 2000-09-26 Nippon Plast Co Ltd Manufacture of air bag cover
JP2001106009A (en) * 1999-10-04 2001-04-17 Toyo Tire & Rubber Co Ltd Instrument panel surface material and its manufacturing method
JP2002234413A (en) * 2000-12-06 2002-08-20 Daihatsu Motor Co Ltd Method of molding airbag cover body
JP2002264757A (en) * 2001-03-13 2002-09-18 Nishikawa Kasei Co Ltd Surface material of air bag door
JP2002347557A (en) * 2001-05-28 2002-12-04 Mitsuboshi Belting Ltd Air bag door integrated type instrument panel
JP2003146171A (en) * 2001-11-12 2003-05-21 Toyoda Gosei Co Ltd Manufacturing method of interior equipment body of automobile
JP2003237516A (en) * 2002-02-20 2003-08-27 Inoac Corp Surface skin and its molding method
JP2005022453A (en) * 2003-06-30 2005-01-27 Takata Corp Air bag cover and air bag module
JP2005104307A (en) * 2003-09-30 2005-04-21 Nippon Plast Co Ltd Air bag cover
JP2005104319A (en) * 2003-09-30 2005-04-21 Nippon Plast Co Ltd Interior panel for automobile
JP2005153637A (en) * 2003-11-21 2005-06-16 Inoac Corp Skin material and forming method thereof
JP2006290305A (en) * 2005-04-14 2006-10-26 Nippon Plast Co Ltd Interior panel for automobile

Also Published As

Publication number Publication date
JP2006290298A (en) 2006-10-26

Similar Documents

Publication Publication Date Title
EP1520754B1 (en) Airbag cover and its production process
JP4820473B2 (en) Automotive interior panels
US8172311B2 (en) Impact absorbing armrest for a motor vehicle
US20230001877A1 (en) Component for vehicle interior
JP4215612B2 (en) Automotive interior panels
JP4668669B2 (en) Automotive interior panels
CN214607087U (en) Instrument board
WO1999065739A1 (en) Integral airbag door configuration
US20080315621A1 (en) Trim Panel for the Interior of a Motor Vehicle and a Manufacturing Process for Such a Trim Panel
JP2006290305A (en) Interior panel for automobile
JP4169672B2 (en) Airbag cover
JP3428345B2 (en) Instrument panel integrated with airbag door and method of manufacturing the same
EP4023503A1 (en) Vehicle crash pad with airbag door
JP4676210B2 (en) Manufacturing method for interior parts for automobiles
JP3893536B2 (en) Airbag door
JP4363634B2 (en) Airbag cover
JP4617948B2 (en) Car armrest
JP2005329805A (en) Door trim structure and door trim manufacturing method
KR102038915B1 (en) Apparatus and method for manufacturing car interior
JP2006264633A (en) Cleavage structure for air bag door
JP2006036149A (en) Airbag cover, and method for manufacturing the same
JP6029836B2 (en) Method for manufacturing vehicle interior member
JP2007022336A (en) Interior equipment with air bag door portion
JP6254479B2 (en) Vehicle interior parts having airbag doors
JPH07232556A (en) Interior trim for vehicle

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071010

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20091228

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100705

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100823

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110111

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110113

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140121

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees