JP4215612B2 - Automotive interior panels - Google Patents
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- JP4215612B2 JP4215612B2 JP2003340994A JP2003340994A JP4215612B2 JP 4215612 B2 JP4215612 B2 JP 4215612B2 JP 2003340994 A JP2003340994 A JP 2003340994A JP 2003340994 A JP2003340994 A JP 2003340994A JP 4215612 B2 JP4215612 B2 JP 4215612B2
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- 239000000463 material Substances 0.000 claims description 42
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005749 polyurethane resin Polymers 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 58
- 210000003491 skin Anatomy 0.000 description 42
- 238000000465 moulding Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 5
- 229920002635 polyurethane Polymers 0.000 description 5
- 239000004814 polyurethane Substances 0.000 description 5
- 238000010107 reaction injection moulding Methods 0.000 description 4
- 210000002615 epidermis Anatomy 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 230000037075 skin appearance Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- 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２０００３−１４６１７１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. 20003-146171, 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。
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.
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の基材層の破断予定部である連続溝状開口部に対応する部位において、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不連続凹部を連設し、かつ、該凹部にはクッション層が延設された構成とし、これを別途成形した基材層と共にキャビティ内にインサートし、その間にクッション層を射出して成形したパネルが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 intensive studies, the present inventors first determined that the panel has a structure corresponding to the continuous groove-shaped opening, which is the planned fracture portion of the base material layer on the cushion layer side of the soft skin, when the airbag is activated. A discontinuous recess is continuously provided so as to break smoothly, and a cushion layer is extended to the recess, and this is inserted into a cavity together with a separately formed base material layer, and a cushion layer is interposed therebetween. The present inventors have found that a panel formed by injection is suitable for the above purpose, and have reached the present invention.
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、破断予定部は基材層のエアバッグ装置に対向して基材層側に連続溝状に開口して形成した屈曲部を有する弱部よりなり、かつ、該弱部に対応する表皮のクッション層側部位には不連続凹部を連設し、該凹部の該屈曲部に対応する部位には一般部からの深さの異なる第１および第２の段差を設け、該凹部にはクッション層が延設されていることを特徴とする自動車用内装パネル、
（２） 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、破断予定部は基材層のエアバッグ装置に対向して基材層側に開口して形成した屈曲部を有する弱部よりなり、かつ、該弱部に対応する表皮のクッション層側部位には不連続凹部を連設し、少なくとも該屈曲部の屈曲点外側に対応する位置における該不連続凹部には一般部から傾斜して凹部の縁部に達する凸状部を設け、該凹部にはクッション層が延設されていることを特徴とする自動車用内装パネル、
（３） 前記屈曲部における前記表皮の不連続凹部は溝状をなす孔であることを特徴とする前記（１）または（２）記載の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, and a portion to be broken Is formed of a weak portion having a bent portion formed by opening in the shape of a continuous groove on the base material layer side facing the airbag device of the base material layer, and on the cushion layer side portion of the skin corresponding to the weak portion Is provided with discontinuous recesses, and a portion corresponding to the bent portion of the recess is provided with first and second steps having different depths from the general portion, and a cushion layer is extended in the recess. Automotive interior panels, characterized by
(2) The interior of an automobile in which a portion to be broken that covers the airbag inflating direction of the airbag device incorporating the 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, and a portion to be broken Is formed of a weak portion having a bent portion that is formed to open to the base material layer facing the airbag device of the base material layer, and a discontinuous recess is formed in the cushion layer side portion of the skin corresponding to the weak portion The discontinuous recess at a position corresponding to at least the outside of the bending point of the bent portion is provided with a convex portion that inclines from the general portion and reaches the edge of the recess, and the cushion layer extends to the recessed portion. Automotive interior panels, characterized by being installed,
(3) The automotive interior panel according to (1) or (2), wherein the discontinuous recesses of the skin in the bent portion are groove-shaped holes,
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、表皮の基材層破断予定部に対応する部位に不連続凹部を連設して備え、かつその不連続凹部にはクッション層が延設されているので、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、強度が小さい表皮の前記凹部にはクッション層が延設されており、しかも全体を連続溝にしていないので、通常時に、その凹部によって、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凹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凹部内部に延設しているので、表皮に設けた凹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。 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. A panel with excellent appearance and touch can be obtained, and when the airbag device is activated, a discontinuous recess is continuously provided at a portion corresponding to the base material layer planned fracture portion of the skin, and the discontinuous recess is provided in the discontinuous recess. Since the cushion layer is extended, the airbag interior can be broken as smoothly as expected without breaking beyond the planned breakage when the airbag is activated, and the interior panel for automobiles has high reliability. Can be obtained. On the other hand, since the cushion layer is extended in the concave portion of the skin that is soft, thin, and low in strength, and the entire skin is not formed as a continuous groove, there is no concern that the skin will be damaged by the concave portion at normal times. In addition, even if the occupant touches directly, the presence of the concave portion is not felt, and in addition, the cushion layer extends inside the concave portion of the skin, so that the panel surface is visually affected by the concave portion provided in the skin. Never reach. 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.
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。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０．８〜１．０ｍｍ、凹部における厚みは、０．３ｍｍ程度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前記の凸状部は、一般部からの高さを好ましくは１．０〜２．０ｍｍ、より好ましくはおよそ１．５ｍｍとし、またその幅は２．５ｍｍ〜６．０ｍｍが好ましく、一般部から傾斜して凹部の縁部に達する形状が好ましい。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。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. 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 with good tactile sensation, the thickness is preferably 0.8 to 1.0 mm in the general part, and the thickness in the recess is preferably about 0.3 mm. . The convex portion provided in a more preferred embodiment of the present invention preferably has a height from the general portion of 1.0 to 2.0 mm, more preferably about 1.5 mm, and a width of 2. 5 mm-6.0 mm are preferable, and the shape which inclines from a general part and reaches the edge of a recessed part is preferable. Since the skin is thin in this way, especially at the site where it is expected to break, the polyurethane resin material is preferably a low-viscosity material with high fluidity, and has 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 Is done. As a result, the skin appearance can be prevented from being affected by the recess.
本発明のエアバッグカバーは、その破断予定線を形成する弱部の周辺の構造が重要である。
すなわち、該弱部は、基材層においてエアバッグ装置側から、好ましくは溝残厚０．３〜２．５ｍｍの連続溝状で設けられる。そして、この部位に対応する前記表皮のクッション層側には、不連続な凹部が連設されている。この凹部での表皮の厚みは、前記のように０．３ｍｍ程度とするのが好ましい。凹部は溝状でもよいが、好ましくは特に間隔を置いて連設した孔部とする。孔部は、０．５〜１．５ｍｍの間隔で０．３〜１．０ｍｍφとするのが好ましい。
また、破断予定部が交差する部位では、凹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、表皮の裏面にも基材層の連続溝からなる弱部に対応するように前記の弱部を設けてるので、エアバッグ装置の作動時に想定された破断線に沿ってスムースな破断を得ることができる。このスムースな破断をより一層確実にするため、前記凹部の側部に凸状部を設けて、軟質で、薄く、強度の小さい表皮が前記凹部により形成される破断予定線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、凸状部は、表皮の凹部のすべての側面に沿って、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）などに重点的に設けてもよい。
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。
前記凸状部は、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。
この破断予定線は、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 the airbag cover of the present invention, the structure around the weak part forming the planned fracture line is important.
That is, the weak part is preferably provided in a continuous groove shape with a remaining groove thickness of 0.3 to 2.5 mm from the airbag device side in the base material layer. And the discontinuous recessed part is continuously provided in the cushion layer side of the said skin corresponding to this site | part. The thickness of the skin at this recess is preferably about 0.3 mm as described above. The concave portion may be a groove shape, but is preferably a hole portion continuously provided with an interval. The holes are preferably 0.3 to 1.0 mmφ at intervals of 0.5 to 1.5 mm.
Moreover, in the site | part which a fracture | rupture planned part cross | intersects, it is preferable in order to make it rupture smoothly that a recessed part is continuously formed in a cross | intersection site | part.
In the present invention, since the weak portion is provided on the back surface of the skin so as to correspond to the weak portion formed by the continuous groove of the base material layer, it is smooth along the fracture line assumed when the airbag device is operated. A break can be obtained. In order to make this smooth break even more certain, a convex portion is provided on the side of the recess, and the soft, thin, low-strength skin is scheduled to break beyond the planned break line formed by the recess. It is preferable to further wipe out the fear of breaking to the outside region. Therefore, the convex portion may be provided on one side or both sides along all the side surfaces of the concave portion of the epidermis, but an area where an unscheduled shift may occur more at the fracture portion, for example, a planned fracture line You may give it intensively in the part (bending part) etc. which cross | intersect.
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 convex portion can also contribute to the improvement of the surface appearance of the skin. 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.
According to the shape of the door portion of the airbag cover, the planned breaking line 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.
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 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は凸状部を示す。 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 concave portion, 17 is a continuous concave portion, and 18 is a convex 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.
Claims (3)
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、破断予定部は基材層のエアバッグ装置に対向して基材層側に連続溝状に開口して形成した屈曲部を有する弱部よりなり、かつ、該弱部に対応する表皮のクッション層側部位には不連続凹部を連設し、該凹部の該屈曲部に対応する部位には一般部からの深さの異なる第１および第２の段差を設け、該凹部にはクッション層が延設されていることを特徴とする自動車用内装パネル。 An automotive interior panel formed on the side facing an airbag device with a planned fracture 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. And
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, and a portion to be broken Is formed of a weak portion having a bent portion formed by opening in the shape of a continuous groove on the base material layer side facing the airbag device of the base material layer, and on the cushion layer side portion of the skin corresponding to the weak portion Is provided with discontinuous recesses, and a portion corresponding to the bent portion of the recess is provided with first and second steps having different depths from the general portion, and a cushion layer is extended in the recess. An automotive interior panel characterized by
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、破断予定部は基材層のエアバッグ装置に対向して基材層側に開口して形成した屈曲部を有する弱部よりなり、かつ、該弱部に対応する表皮のクッション層側部位には不連続凹部を連設し、少なくとも該屈曲部の屈曲点外側に対応する位置における該不連続凹部には一般部から傾斜して凹部の縁部に達する凸状部を設け、該凹部にはクッション層が延設されていることを特徴とする自動車用内装パネル。 An automotive interior panel formed on the side facing an airbag device with a planned fracture 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. And
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, and a portion to be broken Is formed of a weak portion having a bent portion that is formed to open to the base material layer facing the airbag device of the base material layer, and a discontinuous recess is formed in the cushion layer side portion of the skin corresponding to the weak portion The discontinuous recess at a position corresponding to at least the outside of the bending point of the bent portion is provided with a convex portion that inclines from the general portion and reaches the edge of the recess, and the cushion layer extends to the recessed portion. An interior panel for an automobile characterized by being provided.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003340994A JP4215612B2 (en) | 2003-09-30 | 2003-09-30 | Automotive interior panels |
| DE602004014574T DE602004014574D1 (en) | 2003-09-30 | 2004-09-30 | Airbag cover and manufacturing method therefor |
| EP04023377A EP1520754B1 (en) | 2003-09-30 | 2004-09-30 | Airbag cover and its production process |
| ES04023377T ES2308083T3 (en) | 2003-09-30 | 2004-09-30 | COVER FOR AIRBAG AND PROCEDURE FOR MANUFACTURING. |
| US10/953,565 US7425018B2 (en) | 2003-09-30 | 2004-09-30 | Vehicle interior panel and production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003340994A JP4215612B2 (en) | 2003-09-30 | 2003-09-30 | Automotive interior panels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005104319A JP2005104319A (en) | 2005-04-21 |
| JP4215612B2 true JP4215612B2 (en) | 2009-01-28 |
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| JP2003340994A Expired - Fee Related JP4215612B2 (en) | 2003-09-30 | 2003-09-30 | Automotive interior panels |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4668669B2 (en) * | 2005-04-14 | 2011-04-13 | 日本プラスト株式会社 | Automotive interior panels |
| JP4831999B2 (en) * | 2005-05-31 | 2011-12-07 | 三光合成株式会社 | VEHICLE AIRBACK DEVICE AND AIRBACK COVER |
| JP4820473B2 (en) * | 2005-06-21 | 2011-11-24 | 日本プラスト株式会社 | Automotive interior panels |
| JP2007022482A (en) * | 2005-07-21 | 2007-02-01 | Nishikawa Kasei Co Ltd | Instrument panel for vehicle and its manufacturing method |
| JP4690164B2 (en) * | 2005-09-29 | 2011-06-01 | 住化バイエルウレタン株式会社 | Manufacturing method of automotive interior panel |
| JP4953420B2 (en) | 2005-12-28 | 2012-06-13 | 日本プラスト株式会社 | Molded product and insert molding method |
| CN109789619B (en) * | 2016-09-30 | 2021-03-05 | 本田技研工业株式会社 | Resin member, method and apparatus for molding the same |
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