JP6482340B2 - Vehicle interior parts - Google Patents

Vehicle interior parts Download PDF

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JP6482340B2
JP6482340B2 JP2015058596A JP2015058596A JP6482340B2 JP 6482340 B2 JP6482340 B2 JP 6482340B2 JP 2015058596 A JP2015058596 A JP 2015058596A JP 2015058596 A JP2015058596 A JP 2015058596A JP 6482340 B2 JP6482340 B2 JP 6482340B2
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recess
vehicle interior
fracture
front side
breaking
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鈴木　浩
浩 鈴木
鈴木　茂樹
茂樹 鈴木
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Inoac Corp
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Description

この発明は、エアバッグドアが設けられた車両内装部材に関するものである。 The present invention relates to a vehicle interior member for the air bag door is provided.

インストルメントパネルの助手席側には、助手席用のエアバッグ装置が該インストルメントパネルの裏側に配設されている。このため、インストルメントパネルには、エアバッグドアが設けられ、エアバッグ装置の作動時にエアバッグドアが破断予定部で破断して開放することで、エアバッグの乗員室側への膨張が許容されるようになっている。エアバッグドアの破断予定部は、インストルメントパネルを構成する基材の裏面に所定深さの溝を設けることで脆弱化した部分であり、インストルメントパネルの表面に表れないように形成されている。破断予定部は、基材を成形した後に、エンドミルによるミリング加工(特許文献１参照)や、レーザー加工(特許文献２参照)などにより、溝を切削して形成される。また、基材を作る際に溝を併せて型成形することで、破断予定部を形成することができる。   On the passenger seat side of the instrument panel, an airbag device for the passenger seat is disposed on the back side of the instrument panel. For this reason, the instrument panel is provided with an airbag door, and the airbag door is allowed to inflate to the passenger compartment side by breaking and opening at the planned breakage portion when the airbag device is activated. It has become so. The planned break portion of the airbag door is a portion weakened by providing a groove with a predetermined depth on the back surface of the base material constituting the instrument panel, and is formed so as not to appear on the surface of the instrument panel. . The planned fracture portion is formed by cutting the groove by milling with an end mill (see Patent Document 1), laser processing (see Patent Document 2), or the like after forming the base material. Moreover, a fracture | rupture planned part can be formed by shape-molding together with a groove | channel when producing a base material.

特開２００８−２９０６４３号公報JP 2008-290643 A 特開２０１０−１２５９０９号公報JP 2010-125909 A

ミリング加工やレーザー加工で溝を基材に形成する方法では、基材の成形後に加工することになり、加工工数が増えてしまう。そして、インジェクション成形などの型成形により多層構造のインストルメントパネルを得る場合は、加工工数を減らすことができるが、多層のうちの一層目だけに溝が形成されるため、エアバッグドアの展開性能を確保する工夫を要する。   In the method of forming grooves on a base material by milling or laser processing, processing is performed after the base material is formed, and the number of processing steps increases. And when obtaining a multi-layered instrument panel by molding such as injection molding, the processing man-hours can be reduced, but since the groove is formed only in the first layer of the multi-layer, the deployment performance of the airbag door It is necessary to devise to secure

すなわち本発明は、従来の技術に係る前記問題に鑑み、これらを好適に解決するべく提
案されたものであって、エアバッグ装置の作動時にスムーズに開放できるエアバッグドアが設けられた車両内装部材を提供することを目的とする。 That is, the present invention has been proposed in order to suitably solve these problems related to the prior art, and is a vehicle interior member provided with an airbag door that can be smoothly opened during operation of the airbag apparatus. The purpose is to provide.

前記課題を克服し、所期の目的を達成するため、本願の請求項１に係る発明の車両内装部材は、
裏側からエアバッグで押圧されると破断する破断予定部を備え、該破断予定部の破断により該破断予定部に囲まれた部分がエアバッグドアとして開く車両内装部材において、
該車両内装部材の裏側の第１部材と、該車両内装部材の表側の第２部材と、を備え、
前記第１部材は、
該第１部材の表側の面から表側へ向けて突出する凸状に形成され、前記破断予定部に沿って並ぶように複数設けられた突出部と、
該第１部材の裏側の面における前記突出部に対応する位置に設けられた凹みであって、その底が該突出部の内側まで入り込む第１破断凹部と、
該第１部材の裏側の面に設けられた凹みであって、その底が前記第１破断凹部の底と段差を有するように形成され、該第１破断凹部と共に前記破断予定部として機能する第２破断凹部と、を備え、
前記第２部材は、前記突出部の突出端が該第２部材の表側に露出するように前記第１部材の表側を覆い、該第２部材の表側の面が、該突出部の突出端と共に前記車両内装部材の表側の面を構成し、
前記第２部材の表側の面には、前記突出部の周りを凹ませた陥凹部が形成され、
前記第２破断凹部は、前記突出部におけるそれらの並び方向に沿う２つの側面のうちの一方の側面と前記陥凹部とが接する位置を通って該一方の側面を表裏方向へ延長したラインに、該第２破断凹部の底が交差するよう設けられていることを要旨とする。
請求項１に係る発明によれば、第１部材に設けられた第２破断凹部により、車両内装部材における第１部材の突出部と第２部材の陥凹部とが接する位置を通るラインにおいて、第１部材が破断する距離を短くすることができる。また、第２破断凹部は、その底が突出部の一方の側面と前記陥凹部とが接する位置を通って該一方の側面を車両内装部材の表裏方向へ延長したラインに交差するように設けられているので、エアバッグ装置が作動した際に車両内装部材にかかる力を突出部の一方の側面に沿って作用させることができる。これにより、車両内装部材を突出部の一方の側面に沿って破断して、エアバッグドアをスムーズに開放することができる。しかも、第２部材は、陥凹部により、突出部と接する位置が脆弱化されているので、車両内装部材の破断に際する第２部材の影響をより小さくすることができる。このように、破断予定部を構成する第１破断凹部および第２破断凹部を第１部材だけに設けても、エアバッグドアの展開性能を確保することができるから、型成形により破断予定部を形成することが可能となり、破断予定部の加工工数の増加を抑えることができる。 In order to overcome the above-mentioned problems and achieve the intended object, the vehicle interior member of the invention according to claim 1 of the present application,
In a vehicle interior member that includes a planned fracture portion that breaks when pressed with an airbag from the back side, and a portion surrounded by the planned fracture portion opens as an airbag door by breaking the planned fracture portion ,
A first member on the back side of the vehicle interior member, and a second member on the front side of the vehicle interior member,
The first member is
A plurality of protrusions that are formed in a convex shape that protrudes from the front side surface of the first member toward the front side, and are arranged along the planned fracture portion;
A recess provided at a position corresponding to the protrusion on the back surface of the first member, the first breaking recess where the bottom of the first member enters the inside of the protrusion,
A recess provided on the back surface of the first member, the bottom of which is formed so as to have a step with the bottom of the first breaking recess, and functions as the planned breaking portion together with the first breaking recess. 2 fracture recesses,
The second member covers the front side of the first member such that the protruding end of the protruding portion is exposed to the front side of the second member, and the front side surface of the second member together with the protruding end of the protruding portion Constituting a front side surface of the vehicle interior member,
The front surface of the second member is formed with a recessed portion that is recessed around the protruding portion,
The second breaking recess is a line extending in the front and back direction through the position where one of the two side surfaces along the alignment direction of the projecting portion is in contact with the recess. The gist is that the bottoms of the second fracture recesses are provided so as to intersect each other.
According to the first aspect of the present invention, in the line passing through the position where the protruding portion of the first member and the recessed portion of the second member of the vehicle interior member are in contact with each other by the second breaking recess provided in the first member. it can be first member to shorten the distance to break. The second breaking recess is provided such that the bottom crosses one side the through hand side and the and the recess are in contact with the position of the projecting portion to a line extended to the front and back direction of the vehicle interior member since being can airbag device exerts along the side of the hand of the projecting portion of the force applied to the vehicle interior member upon actuation. Thus, broken along a vehicle interior member on the side surface of the hand of the protrusion, it is possible to open the air bag door smoothly. Moreover, the second member, by Recessed recess, the position has been weakened in contact with the projecting portion, it is possible to further reduce the influence of the second member which upon rupture of the vehicle interior member. As described above, even if the first break concave portion and the second break concave portion constituting the planned fracture portion are provided only in the first member, the deployment performance of the airbag door can be ensured. Therefore, it is possible to suppress the increase in the number of processing steps for the portion to be broken.

請求項２に係る発明では、前記突出部におけるそれらの並び方向に沿う２つの側面は、該突出部の根元側から突出端側へ向かうにつれて互いに近づくように傾斜形成されることを要旨とする。
請求項２に係る発明によれば、突出部の一方の側面を傾斜形成することで、第１部材の破断の伝播を安定させて、エアバッグドアの開放をよりスムーズにできる。 The gist of the invention according to claim 2 is that the two side surfaces of the projecting portion along the arrangement direction thereof are inclined so as to approach each other from the base side to the projecting end side of the projecting portion.
According to the invention of claim 2, by inclination forming the sides of the hand of the protruding portion, to stabilize the propagation of the fracture of the first member can open the air bag door more smoothly.

請求項３に係る発明では、前記第２破断凹部は、前記突出部におけるそれらの並び方向に沿う２つの側面のうち、前記破断予定部に囲まれた部分がある側の側面を通る前記ラインに、該第２破断凹部の底が交差するよう設けられていることを要旨とする。
請求項３に係る発明によれば、突出部を車両内装部材側に残してエアバッグドアを開放するよう構成することで、破断予定部においてより安定した破断を達成できる。 In the invention which concerns on Claim 3, a said 2nd fracture | rupture recessed part is the said line which passes through the side surface of the side with the part enclosed by the said fracture | rupture planned part among the two side surfaces along those arrangement directions in the said protrusion part. The gist is that the bottoms of the second fracture recesses are provided so as to intersect .
According to the invention which concerns on Claim 3, a more stable fracture | rupture can be achieved in the planned fracture | rupture part by comprising so that a protrusion part may be left in the vehicle interior member side and an airbag door may be open | released.

請求項４に係る発明では、前記突出部の突出端には、糸の撚り目に見える筋状の凹凸が設けられ、
前記第１部材に設けられ、前記第２部材の表側において糸目に見えるように間隔をあけて並ぶ複数の前記突出部と、前記第２部材に設けられ、該突出部に向かうにつれて凹む前記陥凹部とにより、擬似的なステッチ模様が構成されていることを要旨とする。
請求項４に係る発明によれば、突出部と陥凹部とによりステッチ模様を表現することができ、エアバッグドアの外縁部に設けたステッチ模様の部分を破断予定部とすることができる。 In the invention according to claim 4, the projecting end of the projecting portion is provided with streak-like irregularities visible in the yarn strands ,
A plurality of the protrusions provided on the first member and arranged at intervals so as to be visible on the front side of the second member, and the recesses provided on the second member and recessed toward the protrusion. Thus, the gist is that a pseudo stitch pattern is formed .
According to the invention which concerns on Claim 4, a stitch pattern can be expressed by a protrusion part and a recessed part, and the part of the stitch pattern provided in the outer edge part of an airbag door can be made into a fracture | rupture plan part.

本発明に係る車両内装部材によれば、エアバッグ装置の作動時にエアバッグドアをスムーズに開放できる。 According to the vehicle interior member of the present invention, the airbag door can be opened smoothly when the airbag apparatus is activated.

本発明の好適な実施例に係るエアバッグドアが設けられたインストルメントパネルを示す概略斜視図である。1 is a schematic perspective view showing an instrument panel provided with an airbag door according to a preferred embodiment of the present invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 実施例のエアバッグドアを示す平面図である。It is a top view which shows the airbag door of an Example. 図３のＢ−Ｂ線断面図である。FIG. 4 is a sectional view taken along line BB in FIG. 3. 実施例のインストルメントパネルにおいて破断予定部が設けられた部位を破断して示す概略斜視図である。It is a schematic perspective view which fractures | ruptures and shows the site | part in which the fracture | rupture planned part was provided in the instrument panel of an Example. インジェクション二色成形によるインストルメントパネルの製造工程を示す説明図であり、破断予定部に対応する部位を破断している。It is explanatory drawing which shows the manufacturing process of the instrument panel by injection two-color shaping | molding, and has fractured | ruptured the site | part corresponding to the planned fracture | rupture part.

次に、本発明に係る車両内装部材につき、好適な実施例を挙げて、添付図面を参照して以下に説明する。なお、実施例では、車両内装部材であるインストルメントパネルに、エアバッグドアを適用する場合について説明する。 Next, preferred embodiments of the vehicle interior member according to the present invention will be described below with reference to the accompanying drawings. In the embodiment, the instrument panel is a vehicle interior member, it will be described the case of applying the d Abaggudoa.

図１に示すように、実施例のインストルメントパネル１０は、第１部材１２と、この第１部材１２の表側に設けられる第２部材１４とを備える板状体であり、革等の表皮材で覆われた状態を模して意匠面が形成されている。また、インストルメントパネル１０の意匠面には、表皮材を糸で縫った際に表側に現れる糸目を表現した疑似的なステッチ模様１６が設けられている。ここで、インストルメントパネル１０には、助手席側のエアバッグ装置１８の配設位置に対応して、ステッチ模様１６が助手席の前方位置に設けられている。ステッチ模様１６は、ほぼ四辺形状に糸目が並ぶように形成され、エアバッグドア２０のドアパネルの外縁となる部位に応じて設けられている。換言すると、実施例では、車両前方側の縁をヒンジ側として、車両前方側へ立ち上がるように開放する１枚の四辺形状のドアパネル２２からなるエアバッグドア２０に対応して、ステッチ模様１６が設けられている。   As shown in FIG. 1, the instrument panel 10 of an Example is a plate-shaped body provided with the 1st member 12 and the 2nd member 14 provided in the front side of this 1st member 12, and is a skin material, such as leather. The design surface is formed to imitate the state covered with. In addition, the design surface of the instrument panel 10 is provided with a pseudo stitch pattern 16 expressing the stitches that appear on the front side when the skin material is sewn with the thread. Here, on the instrument panel 10, a stitch pattern 16 is provided at the front position of the passenger seat corresponding to the position of the airbag device 18 on the passenger seat side. The stitch pattern 16 is formed so that the thread is arranged in a substantially quadrilateral shape, and is provided in accordance with a portion that is an outer edge of the door panel of the airbag door 20. In other words, in the embodiment, the stitch pattern 16 is provided corresponding to the airbag door 20 including the single quadrilateral door panel 22 that is open so as to rise to the vehicle front side with the vehicle front side edge as the hinge side. It has been.

図３に示すように、前記インストルメントパネル１０は、第２部材１４の表面によって意匠面の大部分が構成され、第１部材１２に形成されて第２部材１４の表面から露出する突出部２４によって、ステッチ模様１６の糸目が表されている。そして、インストルメントパネル１０では、第２部材１４から表側に露出して糸目部として機能する突出部２４の突出端と第２部材１４の表面とが互いに異なる色で形成されている。すなわち、インストルメントパネル１０は、表皮材を縫合する糸を模した突出部２４が該糸に合わせて色が設定される一方、表皮材を模した第２部材１４の表面が該表皮材に合わせて色が設定される。   As shown in FIG. 3, in the instrument panel 10, most of the design surface is constituted by the surface of the second member 14, and the protrusion 24 is formed on the first member 12 and exposed from the surface of the second member 14. The thread of the stitch pattern 16 is represented by. And in the instrument panel 10, the protrusion end of the protrusion part 24 exposed to the front side from the 2nd member 14 and functioning as a thread part and the surface of the 2nd member 14 are formed in a mutually different color. That is, in the instrument panel 10, the protrusion 24 that imitates a thread for sewing the skin material is set in color according to the thread, while the surface of the second member 14 that imitates the skin material matches the skin material. To set the color.

前記第１部材１２は、インストルメントパネル１０の裏側全体を構成し、インストルメントパネル１０の剛性を担う硬質な板状体である。第１部材１２は、表側が第２部材１４によって被覆される平板状のベース部１２ａと、このベース部１２ａの表側に一体形成された複数の突出部２４とを備えている(図２参照)。各突出部２４は、ベース部１２ａの表面から表側に向けて突出し、インストルメントパネル１０の表側に臨む突出端が、インストルメントパネル１０の平面視において糸目の１つを模した棒形状に形成される。突出部２４は、複数の突出部２４の並び方向に前記棒形状の長手が延在するよう形成されている。各突出部２４の突出端には、細い筋状の凹凸形状が設けられ、この凹凸形状によりステッチ模様１６を構成する糸目部における糸の撚り目が表されている。複数の突出部２４は、突出端の長手辺を直列に並べて設けられ、長手辺の延在向きが同じ複数の突出部２４により一条のステッチ模様１６を構成している。ここで、複数の突出部２４は、インストルメントパネル１０においてエアバッグドア２０のドアパネル２２となる部位の外縁を囲うように並べて設けられている。インストルメントパネル１０は、ほぼ四辺形のドアパネル２２に合わせて、左右方向に長手辺を延在させた突出部２４が左右方向に一列に並ぶ前後２条のステッチ模様１６,１６と、前後方向に長手辺を延在させた突出部２４が前後方向に一列に並ぶ左右２条のステッチ模様１６,１６が設けられている(図３参照)。   The first member 12 is a hard plate-like body that constitutes the entire back side of the instrument panel 10 and bears the rigidity of the instrument panel 10. The first member 12 includes a flat base portion 12a whose front side is covered by the second member 14, and a plurality of protrusions 24 integrally formed on the front side of the base portion 12a (see FIG. 2). . Each protruding portion 24 protrudes from the surface of the base portion 12a toward the front side, and a protruding end facing the front side of the instrument panel 10 is formed in a bar shape imitating one of the threads in a plan view of the instrument panel 10. The The protruding portion 24 is formed so that the length of the bar shape extends in the arrangement direction of the plurality of protruding portions 24. The protruding end of each protruding portion 24 is provided with a thin streak-like uneven shape, and the uneven shape represents a yarn twist in the yarn portion constituting the stitch pattern 16. The plurality of protruding portions 24 are provided with the long sides of the protruding ends arranged in series, and the plurality of protruding portions 24 having the same extending direction of the long sides constitute a single stitch pattern 16. Here, the plurality of projecting portions 24 are arranged side by side so as to surround the outer edge of the portion that becomes the door panel 22 of the airbag door 20 in the instrument panel 10. The instrument panel 10 has two front and rear stitch patterns 16 and 16 arranged in a line in the left-right direction, and a protruding portion 24 having a long side extending in the left-right direction in accordance with the substantially quadrilateral door panel 22 and the front-rear direction. There are provided two left and right stitch patterns 16 and 16 in which protrusions 24 extending in the longitudinal direction are arranged in a line in the front-rear direction (see FIG. 3).

前記突出部２４は、複数の突出部２４の並び方向(以下、糸並び方向という)に延びる両長手側面が、ベース部１２ａに連なる根元側から突出端側に向かうにつれて互いに近づくように傾いている。突出部２４の長手側面は、インストルメントパネル１０の表裏方向(厚み方向)を通る仮想線に対して傾いたテーパ面であり、例えば３°程度の傾斜に設定される。実施例では、突出部２４が基本的に同じ長さで形成されると共に、隣り合う突出部２４,２４同士の間隔が基本的に一定になっている。   The protrusions 24 are inclined such that both longitudinal side surfaces extending in the direction in which the plurality of protrusions 24 are arranged (hereinafter referred to as the yarn arrangement direction) approach each other as they go from the root side connected to the base portion 12a toward the protruding end side. . The longitudinal side surface of the protrusion 24 is a tapered surface inclined with respect to a virtual line passing through the front and back direction (thickness direction) of the instrument panel 10, and is set to an inclination of about 3 °, for example. In the embodiment, the protrusions 24 are basically formed with the same length, and the interval between the adjacent protrusions 24, 24 is basically constant.

図２,図３および図５に示すように、前記第２部材１４の表面には、該第２部材１４の表側に露出する突出部２４の周辺部位に、該突出部２４に向かうにつれて凹む陥凹部２６が形成されている。第２部材１４では、隣り合う突出部２４,２４に対応した陥凹部２６が互いに繋がって、隣り合う突出部２４,２４の間、および突出部２４の両側が凹む溝状に形成されている。そして、ステッチ模様１６において、陥凹部２６により突出部２４がなす糸目によって第２部材１４が圧縮された形状が表現される。なお、第２部材１４の表面には、必要に応じてシボ加工などの模様が形成される。   As shown in FIGS. 2, 3, and 5, the surface of the second member 14 is recessed at the peripheral portion of the protruding portion 24 exposed on the front side of the second member 14 toward the protruding portion 24. A recess 26 is formed. In the 2nd member 14, the recessed part 26 corresponding to the adjacent protrusion parts 24 and 24 is connected mutually, and it is formed in the groove shape which the recessed part between the adjacent protrusion parts 24 and 24 and the both sides of the protrusion part 24 is dented. In the stitch pattern 16, a shape in which the second member 14 is compressed by the thread formed by the protruding portion 24 by the recessed portion 26 is expressed. A pattern such as a texture is formed on the surface of the second member 14 as necessary.

前記第１部材１２および第２部材１４をなす素材としては、種々のものを採用し得る。例えば、ポリプロピレン(ＰＰ)、ポリエチレン(ＰＥ)、ＴＰＯ(オレフィン系エラストマー)等のエラストマー、ポリウレタン等の発泡体など、第１部材１２と第２部材１４とで同じ素材にしたり、異なる素材を組み合わせたりすることができる。なお、実施例では、第１部材１２がポリプロピレンからなり、第２部材１４がＴＰＯから形成される。また、実施例のインストルメントパネル１０は、インジェクション二色成形で成形され、第２部材１４をなす素材が硬化する際に第１部材１２と接合されて、第１部材１２と第２部材１４とが成形時に一体化される。   Various materials can be used as the material forming the first member 12 and the second member 14. For example, the first member 12 and the second member 14 may be made of the same material, or different materials may be combined, such as an elastomer such as polypropylene (PP), polyethylene (PE), and TPO (olefin elastomer), and a foamed material such as polyurethane. can do. In the embodiment, the first member 12 is made of polypropylene and the second member 14 is made of TPO. In addition, the instrument panel 10 according to the embodiment is molded by injection two-color molding, and is joined to the first member 12 when the material forming the second member 14 is cured, and the first member 12 and the second member 14 Are integrated during molding.

前記エアバッグドア２０は、インストルメントパネル１０に設けられた破断予定部２８で破断して、インストルメントパネル１０の一部を構成していたドアパネル２２が開放するように構成される(図２参照)。破断予定部２８は、第１部材１２を部分的に薄肉化することで、元の厚みのままの一般部分よりもインストルメントパネル１０を脆弱化した部分である。図５に示すように、破断予定部２８は、突出部２４に対応して第１部材１２に形成された第１破断凹部３０と、第１破断凹部３０に繋がるように第１部材１２に形成された第２破断凹部３２とを備えている。第１破断凹部３０は、突出部２４の形成位置に対応して設けられ、インストルメントパネル１０の裏側に開放する凹状に形成されている。また、第１破断凹部３０は、第１部材１２の裏面から突出部２４まで達する深さで形成されている。すなわち、第１破断凹部３０は、第１部材１２のベース部１２ａにおける第２部材１４に覆われる表面を越えて、表側へ突出する突出部２４の内側まで凹んでいる。第１破断凹部３０は、突出部２４の長手側面の傾斜に合わせて壁が斜めに形成され、開口から閉塞端へ向かうにつれて細くなっている。   The airbag door 20 is configured to be broken at a planned fracture portion 28 provided in the instrument panel 10 so that a door panel 22 constituting a part of the instrument panel 10 is opened (see FIG. 2). ). The fracture | rupture planned part 28 is the part which weakened the instrument panel 10 rather than the general part with the original thickness by thinning the 1st member 12 partially. As shown in FIG. 5, the planned fracture portion 28 is formed in the first member 12 so as to be connected to the first fracture recess 30 formed in the first member 12 corresponding to the protrusion 24 and the first fracture recess 30. The second fractured recess 32 is provided. The 1st fracture | rupture recessed part 30 is provided corresponding to the formation position of the protrusion part 24, and is formed in the concave shape open | released to the back side of the instrument panel 10. FIG. Further, the first fractured recess 30 is formed with a depth reaching from the back surface of the first member 12 to the protruding portion 24. That is, the 1st fracture | rupture recessed part 30 is dented inside the protrusion part 24 which protrudes to the front side beyond the surface covered with the 2nd member 14 in the base part 12a of the 1st member 12. FIG. The first fracture recess 30 has a wall formed obliquely in accordance with the inclination of the longitudinal side surface of the protrusion 24, and becomes narrower from the opening toward the closed end.

図２および図５に示すように、前記第２破断凹部３２は、糸並び方向に延びる突出部２４の一方の長手側面(一側面)と陥凹部２６とが接する位置を該一方の長手側面に沿ってインストルメントパネル１０の表裏方向へ通るライン(以下、破断ラインという)Ｌ上に設けられている。第２破断凹部３２は、突出部２４の一方の長手側面にだけ対応して設けられ、第１部材１２における破断ラインＬが通る部分を薄肉としている。そして、第１部材１２は、突出部２４の他方の長手側面と陥凹部２６とが接する位置を該他方の側面に沿ってインストルメントパネル１０の表裏方向へ通るライン上が、脆弱化されていない一般部分のままになっている。第２破断凹部３２は、突出部２４の根元とベース部１２ａの表面が交差する部位よりも底が突出部２４より離れるよう、該ベース部１２ａの表面に沿って延在し、側壁が前記破断ラインＬに沿って延在するように形成されている。また、第２破断凹部３２は、側壁が前記破断ラインＬから離れるように形成されている。   As shown in FIGS. 2 and 5, the second breaking recess 32 has a position where one longitudinal side surface (one side surface) of the projecting portion 24 extending in the yarn alignment direction and the recessed portion 26 are in contact with the one longitudinal side surface. It is provided on the line (henceforth a fracture | rupture line) L which passes along the front-back direction of the instrument panel 10 along. The 2nd fracture | rupture recessed part 32 is provided corresponding to only one longitudinal side surface of the protrusion part 24, and is making thin the part through which the fracture | rupture line L in the 1st member 12 passes. And the 1st member 12 is not weakened on the line which passes along the other side in the front-and-back direction of the instrument panel 10 in the position where the other long side of projection 24 and crevice 26 touch. The general part remains. The second fracture recess 32 extends along the surface of the base portion 12a such that the bottom is separated from the projection portion 24 rather than the portion where the base of the projection portion 24 and the surface of the base portion 12a intersect, and the side wall is ruptured. It is formed so as to extend along the line L. The second fracture recess 32 is formed such that the side wall is away from the fracture line L.

図４に示すように、第１破断凹部３０およびこの第１破断凹部３０に繋がる第２破断凹部３２は、突出部２４ごとに形成され、隣り合う突出部２４,２４の間が薄肉化されていない一般部分となっている。すなわち、破断予定部２８は、糸並び方向に互いに離間して並ぶ複数の凹部３０,３２によりミシン目状に構成されている。ここで、糸並び方向に並ぶ複数の第２破断凹部３２は、突出部２４に対して同じ側に設けられている。実施例では、第２破断凹部３２がドアパネル２２の内側を向く突出部２４の一方の長手側面に対応して、第１部材１２に設けられている。   As shown in FIG. 4, the first breaking recess 30 and the second breaking recess 32 connected to the first breaking recess 30 are formed for each protrusion 24, and the space between adjacent protrusions 24, 24 is thinned. There has been no general part. That is, the planned fracture portion 28 is formed in a perforated shape by a plurality of concave portions 30 and 32 that are spaced apart from each other in the yarn arrangement direction. Here, the plurality of second fracture recesses 32 arranged in the yarn arrangement direction are provided on the same side with respect to the protrusion 24. In the embodiment, the second breaking recess 32 is provided in the first member 12 corresponding to one longitudinal side surface of the protruding portion 24 facing the inside of the door panel 22.

図２に示すように、エアバッグドア２０は、インストルメントパネル１０の裏面に振動溶着等で取り付けられた補強部材３４により補強されている。補強部材３４は、例えばＴＰＯ等の靭性が高く柔軟性に富んだ合成樹脂素材からインジェクション成形されたものが用いられる。補強部材３４は、角筒状に形成されて、エアバッグドア２０となる部位の外周を囲うように第１部材１２の裏面に接合される本体部３６と、第１部材１２におけるドアパネル２２となる部位の裏面に接合されるパネル支持部３８とを備えている。本体部３６とパネル支持部３８との間には、ヒンジ部４０が架設され、ドアパネル２２がパネル支持部３８を介してヒンジ部４０で支持されたもとで開放するようになっている。また、補強部材３４には、エアバッグ装置１８が配設される。   As shown in FIG. 2, the airbag door 20 is reinforced by a reinforcing member 34 attached to the back surface of the instrument panel 10 by vibration welding or the like. The reinforcing member 34 is made of a synthetic resin material having high toughness and high flexibility such as TPO, for example. The reinforcing member 34 is formed in a rectangular tube shape, and becomes a main body portion 36 joined to the back surface of the first member 12 so as to surround the outer periphery of the portion that becomes the airbag door 20, and the door panel 22 in the first member 12. And a panel support portion 38 joined to the back surface of the part. A hinge portion 40 is installed between the main body portion 36 and the panel support portion 38 so that the door panel 22 is opened while being supported by the hinge portion 40 via the panel support portion 38. Further, the airbag device 18 is disposed on the reinforcing member 34.

次に、実施例に係るインストルメントパネル１０の製造方法について、図６を参照して説明する。実施例では、インストルメントパネル１０が、第１部材１２の裏面を規定する共通型５２を共用する所謂二色成形によって製造される。実施例で用いられる成形装置５０は、第１位置と第２位置との間で移動可能に設けられた共通型５２と、第１位置にある共通型５２に相対するように配置され、該共通型５２に対して進退移動する第１型５４と、第２位置にある共通型５２に相対するように配置され、該共通型５２に対して進退移動する第２型５６とを備えている。共通型５２の成形面には、第１破断凹部３０および第２破断凹部３２に合わせて凸状部５２ａが設けられている。また、第１型５４の成形面には、突出部２４に合わせて凹状部５４ａが設けられている。なお、凹状部５４ａの閉塞端には、細かい筋状の凹凸(図示せず)が設けられて、第１部材１２の成形と同時に突出部２４の突出端に糸の撚り目を模した凹凸形状を付すようになっている。共通型５２と第１型５４とを型閉めすることで、共通型５２と第１型５４との間に前記第１部材１２に合わせた第１キャビティ５８が画成される(図６(ａ))。第１キャビティ５８に第１部材１２の素になる第１樹脂原料を圧力をかけつつ注入するインジェクション成形を行う。これにより、第１部材１２の裏側が共通型５２の成形面で規定される一方、第１部材１２の表側が第１型５４で規定され、複数の突出部２４が表側に形成されると共に第１破断凹部３０および第２破断凹部３２が裏側に形成された第１部材１２が得られる。   Next, a method for manufacturing the instrument panel 10 according to the embodiment will be described with reference to FIG. In the embodiment, the instrument panel 10 is manufactured by so-called two-color molding that shares a common mold 52 that defines the back surface of the first member 12. The molding apparatus 50 used in the embodiment is disposed so as to be opposed to the common mold 52 provided to be movable between the first position and the second position, and the common mold 52 in the first position. A first die 54 that moves forward and backward with respect to the die 52 and a second die 56 that is disposed so as to face the common die 52 at the second position and move forward and backward with respect to the common die 52 are provided. On the molding surface of the common mold 52, a convex portion 52 a is provided in accordance with the first fractured recess 30 and the second fractured recess 32. In addition, a concave portion 54 a is provided on the molding surface of the first mold 54 in accordance with the protruding portion 24. The closed end of the concave portion 54a is provided with fine streak-like irregularities (not shown), and the concave-convex shape imitating the yarn twist at the protruding end of the protruding portion 24 simultaneously with the molding of the first member 12. Is to be attached. By closing the common mold 52 and the first mold 54, a first cavity 58 that matches the first member 12 is defined between the common mold 52 and the first mold 54 (FIG. 6A). )). Injection molding is performed by injecting the first resin raw material, which is the element of the first member 12, into the first cavity 58 while applying pressure. Thus, the back side of the first member 12 is defined by the molding surface of the common mold 52, while the front side of the first member 12 is defined by the first mold 54, and the plurality of protrusions 24 are formed on the front side. The 1st member 12 in which the 1 fracture | rupture recessed part 30 and the 2nd fracture | rupture recessed part 32 were formed in the back side is obtained.

前記共通型５２において凸状部５２ａを破断凹部３０,３２に嵌め合わせて保持した状態で、共通型５２に第１部材１２が残った状態になるように第１型５４を外す(図６(ｂ))。共通型５２を移動して第２型５６に対向配置し(図６(ｃ))、共通型５２と第２型５６とを型閉めすることで、共通型５２と第２型５６との間に前記第２部材１４に合わせた第２キャビティ６０が画成される(図６(ｄ))。第２型５６の成形面には、突出部２４に合わせて該突出部２４の突出端をシールする凹状のシール面５６ａが設けられると共に、このシール面５６ａの周りに陥凹部２６をなす突起部５６ｂが設けられている。なお、シール面５６ａには、細かい筋状の凹凸(図示せず)が設けられて、第１部材１２の成形と同時に形成された突出部２４の突出端の凹凸に噛み合うようになっている。そして、第２部材１４の表側を第２型５６で規定すると共に、突出部２４の突出端部をシール面５６ａでシールした状態で、第２キャビティ６０に第２樹脂原料を注入し、第２部材１４をインジェクション成形する(図６(ｃ))。第２樹脂原料を第２キャビティ６０内で硬化させることで、陥凹部２６を備えた第２部材１４が成形される。このように、二色成形により、意匠面に突出部２４が露出すると共に、突出部２４に合わせて破断予定部２８が形成されたインストルメントパネル１０が得られる。   The first mold 54 is removed so that the first member 12 remains in the common mold 52 in a state where the convex part 52a is fitted and held in the fracture recesses 30 and 32 in the common mold 52 (see FIG. 6). b)). The common mold 52 is moved so as to be opposed to the second mold 56 (FIG. 6C), and the common mold 52 and the second mold 56 are closed so that the common mold 52 and the second mold 56 are closed. A second cavity 60 is defined in accordance with the second member 14 (FIG. 6D). The molding surface of the second die 56 is provided with a concave seal surface 56a that seals the protruding end of the protruding portion 24 in accordance with the protruding portion 24, and a protruding portion that forms a recessed portion 26 around the sealing surface 56a. 56b is provided. The seal surface 56a is provided with fine streak irregularities (not shown) so as to mesh with the irregularities at the projecting end of the projecting portion 24 formed simultaneously with the molding of the first member 12. Then, the second resin material is injected into the second cavity 60 in a state where the front side of the second member 14 is defined by the second mold 56 and the protruding end portion of the protruding portion 24 is sealed by the sealing surface 56a. The member 14 is injection molded (FIG. 6C). By curing the second resin raw material in the second cavity 60, the second member 14 provided with the recessed portion 26 is molded. Thus, the instrument panel 10 in which the projecting portion 24 is exposed on the design surface and the planned fracture portion 28 is formed in accordance with the projecting portion 24 is obtained by two-color molding.

〔実施例の作用〕
次に、エアバッグドア２０が設けられた実施例に係るインストルメントパネル１０の作用について説明する。エアバッグ装置１８が作動すると膨張するエアバッグ４２にインストルメントパネル１０が裏側から押し上げられ、破断予定部２８に力がかかる。ここで、インストルメントパネル１０は、該インストルメントパネル１０における第１部材１２の突出部２４と第２部材１４の陥凹部２６とが接する位置を通る破断ラインＬにおいて、第１破断凹部３０に繋がる第２破断凹部３２により第１部材１２を破断する距離が短くなっている。すなわち、破断予定部２８の中で最も脆弱な第２破断凹部３２からインストルメントパネル１０(第１部材１２)の破断を開始させることができる。また、第２破断凹部３２は、突出部２４の一方の長手側面と陥凹部２６とが接する位置を該一方の長手側面に沿って通る破断ラインＬ上に設けられているので、エアバッグ装置１８が作動した際にインストルメントパネル１０にかかる力を突出部２４の一方の長手側面に沿って作用させることができる。これにより、インストルメントパネル１０を突出部２４の一方の長手側面に沿って破断して、ドアパネル２２をスムーズに開放することができる。しかも、第２部材１４は、突出部２４に向かうにつれて凹む陥凹部２６により、突出部２４と接する位置が脆弱化されているので、インストルメントパネル１０の破断に際する第２部材１４の影響をより小さくすることができる。インジェクション二色成形によって破断予定部２８を構成する第１破断凹部３０および第２破断凹部３２を形成することで、第１破断凹部３０および第２破断凹部３２が第１部材１２だけに設けられる。第１破断凹部３０および第２破断凹部３２が第１部材１２だけに設けられていても、前述のようにエアバッグドア２０は、エアバッグ装置１８の作動時にドアパネル２２をスムーズに開放できるので、エアバッグドア２０に求められる所定の展開性能を確保することができる。すなわち、インジェクション二色成形時に第１破断凹部３０および第２破断凹部３２を併せて形成して、ミリング加工やレーザー加工などのように第１部材１２を成形した後の加工を省くことができ、破断予定部２８の加工工数の増加を抑えることができる。 (Effects of Example)
Next, the operation of the instrument panel 10 according to the embodiment d Abaggudoa 20 is provided. When the airbag device 18 is activated, the instrument panel 10 is pushed up from the back side by the airbag 42 that is inflated, and a force is applied to the planned fracture portion 28. Here, the instrument panel 10 is connected to the first fracture recess 30 at a fracture line L that passes through a position where the protrusion 24 of the first member 12 and the recess 26 of the second member 14 contact each other in the instrument panel 10. The distance at which the first member 12 is broken by the second breaking recess 32 is shortened. That is, the rupture of the instrument panel 10 (first member 12) can be started from the second fragile recess 32 that is the most fragile in the planned rupture portion 28. Moreover, since the 2nd fracture | rupture recessed part 32 is provided on the fracture | rupture line L which passes along the one long side surface through the position where one long side surface of the protrusion part 24 and the recessed part 26 contact | connect, the airbag apparatus 18 is provided. The force applied to the instrument panel 10 when the is operated can be applied along one longitudinal side surface of the protrusion 24. Thereby, the instrument panel 10 can be fractured along one longitudinal side surface of the protruding portion 24, and the door panel 22 can be smoothly opened. Moreover, since the position where the second member 14 comes into contact with the protruding portion 24 is weakened by the recessed portion 26 that is recessed toward the protruding portion 24, the influence of the second member 14 when the instrument panel 10 is broken is affected. It can be made smaller. By forming the first rupture recess 30 and the second rupture recess 32 constituting the planned rupture portion 28 by injection two-color molding, the first rupture recess 30 and the second rupture recess 32 are provided only in the first member 12. Even if the first breaking recess 30 and the second breaking recess 32 are provided only in the first member 12, as described above, the airbag door 20 can smoothly open the door panel 22 when the airbag device 18 is operated. The predetermined deployment performance required for the airbag door 20 can be ensured. That is, it is possible to omit the processing after forming the first member 12 such as milling or laser processing by forming the first fractured recess 30 and the second fractured recess 32 together at the time of injection two-color molding, An increase in processing man-hours of the planned fracture portion 28 can be suppressed.

前記突出部２４の一方の長手側面は傾斜形成されているので、エアバッグ装置１８の作動に伴う第１部材１２における破断予定部２８での破断の伝播をより安定させることができ、ドアパネル２２の開放をよりスムーズにできる。また、第２破断凹部３２は、突出部２４においてドアパネル２２の内側を向く長手側面に対応して設けられているので、突出部２４をインストルメントパネル１０側に残してドアパネル２２を開放させることができる。これにより、第１部材１２において破断を予定していない部位に亀裂が入るなどを防止でき、破断予定部２８においてより安定した破断を達成できる。   Since one longitudinal side surface of the protrusion 24 is formed to be inclined, the propagation of breakage at the breakable portion 28 in the first member 12 accompanying the operation of the airbag device 18 can be further stabilized, and the door panel 22 Opening can be done more smoothly. Moreover, since the 2nd fracture | rupture recessed part 32 is provided corresponding to the longitudinal side surface which faces the inner side of the door panel 22 in the protrusion part 24, it can leave the protrusion part 24 on the instrument panel 10 side, and can open the door panel 22. it can. As a result, it is possible to prevent the first member 12 from being cracked at a site where the fracture is not scheduled, and to achieve a more stable fracture at the planned fracture portion 28.

前記エアバッグドア２０は、該エアバッグドア２０の外縁部に設けられて、突出部２４と陥凹部２６とにより表現される疑似的なステッチ模様１６の部分を破断予定部２８とすることができる。そして、エアバッグドア２０は、第１部材１２に糸目を表現する突出部２４が設けられていても、第１破断凹部３０と第２破断凹部３２とによりドアパネル２２の開放をスムーズに行うことができる。   The airbag door 20 is provided at an outer edge portion of the airbag door 20, and a portion of the pseudo stitch pattern 16 expressed by the protruding portion 24 and the recessed portion 26 can be used as the planned fracture portion 28. . The airbag door 20 can smoothly open the door panel 22 by the first fracture recess 30 and the second fracture recess 32 even if the first member 12 is provided with the protrusion 24 expressing the thread. it can.

(変更例)
前述した構成に限定されず、例えば以下のようにも変更することができる。
(１)実施例では、シングルステッチを模したステッチ模様を示したが、ダブルステッチを模したステッチ模様のアウトステッチまたはインステッチに対応して破断予定部を設けてもよい。
(２)実施例では、突出部におけるドアパネルの内側を向く側面に対応して第２破断凹部を設けたが、突出部におけるドアパネルの外側を向く側面に対応して第２破断凹部を設ける構成であってもよい。
(３)実施例では、２層構造のインストルメントパネルを示したが、３層以上の層構造の車両内装部材にも、前述したエアバッグドアに関する構成を適用できる。なお、３層以上の層構造であっても、第１部材の裏面を規定する共通型を共通とする多色成形によって、車両内装部材を製造することができる。
(４)実施例では、車両内装部材としてインストルメントパネルを挙げたが、ドアトリム、ピラー、グローブボックスなどのその他のものに、前述したエアバッグドアに関する構成を適用できる。
(５)実施例では、１枚のドアパネルからなるエアバッグドアを示したが、破断予定部により２枚のドアパネルが開放する態様や、破断予定部により４枚のドアパネルが開放する態様など、その他の態様であってもよい。
(６)実施例では、第２破断凹部が第１破断凹部に合わせて断続的に設けられているが、第２破断凹部を突出部の並び方向に連続的に設けてもよい。 (Change example)
The present invention is not limited to the configuration described above, and can be modified as follows, for example.
(1) In the embodiment, a stitch pattern simulating a single stitch is shown, but a planned break portion may be provided corresponding to an out stitch or an in stitch of a stitch pattern simulating a double stitch.
(2) In the embodiment, the second breaking recesses are provided corresponding to the side surfaces of the protrusions facing the inside of the door panel. However, the second breaking recesses are provided corresponding to the side surfaces of the protrusions facing the outside of the door panel. There may be.
(3) In the embodiment, an instrument panel having a two-layer structure is shown, but the above-described configuration relating to an airbag door can be applied to a vehicle interior member having a three-layer structure or more. In addition, even if it is a layer structure of 3 layers or more, a vehicle interior member can be manufactured by multicolor molding which makes the common type | mold which prescribes | regulates the back surface of a 1st member in common.
(4) In the embodiment, the instrument panel is used as the vehicle interior member. However, the configuration related to the airbag door described above can be applied to other components such as a door trim, a pillar, and a glove box.
(5) In the embodiment, an airbag door composed of a single door panel is shown. However, such as a mode in which two door panels are opened by the planned breaking portion, a mode in which four door panels are opened by the planned breaking portion, and the like. The aspect of this may be sufficient.
(6) In the embodiment, the second fracture recess is intermittently provided in accordance with the first fracture recess, but the second fracture recess may be provided continuously in the direction in which the protrusions are arranged.

１０ インストルメントパネル(車両内装部材)，１２ 第１部材，１４ 第２部材，
１６ ステッチ模様，２２ ドアパネル，２４ 突出部，２６ 陥凹部，
２８ 破断予定部， ３０ 第１破断凹部，３２ 第２破断凹部，
Ｌ 破断ライン(ライン) 10 instrument panel (vehicle interior member), 12 first member, 14 second member,
16 stitch patterns, 22 door panels, 24 protrusions, 26 recesses,
28 fracture planned portion, 30 first fracture recess, 32 second fracture recess,
L Break line (line)

Claims (4)

裏側からエアバッグで押圧されると破断する破断予定部を備え、該破断予定部の破断により該破断予定部に囲まれた部分がエアバッグドアとして開く車両内装部材において、
該車両内装部材の裏側の第１部材と、該車両内装部材の表側の第２部材と、を備え、
前記第１部材は、
該第１部材の表側の面から表側へ向けて突出する凸状に形成され、前記破断予定部に沿って並ぶように複数設けられた突出部と、
該第１部材の裏側の面における前記突出部に対応する位置に設けられた凹みであって、その底が該突出部の内側まで入り込む第１破断凹部と、
該第１部材の裏側の面に設けられた凹みであって、その底が前記第１破断凹部の底と段差を有するように形成され、該第１破断凹部と共に前記破断予定部として機能する第２破断凹部と、を備え、
前記第２部材は、前記突出部の突出端が該第２部材の表側に露出するように前記第１部材の表側を覆い、該第２部材の表側の面が、該突出部の突出端と共に前記車両内装部材の表側の面を構成し、
前記第２部材の表側の面には、前記突出部の周りを凹ませた陥凹部が形成され、
前記第２破断凹部は、前記突出部におけるそれらの並び方向に沿う２つの側面のうちの一方の側面と前記陥凹部とが接する位置を通って該一方の側面を表裏方向へ延長したラインに、該第２破断凹部の底が交差するよう設けられている
ことを特徴とする車両内装部材。 In a vehicle interior member that includes a planned fracture portion that breaks when pressed with an airbag from the back side, and a portion surrounded by the planned fracture portion opens as an airbag door by breaking the planned fracture portion ,
A first member on the back side of the vehicle interior member, and a second member on the front side of the vehicle interior member,
The first member is
A plurality of protrusions that are formed in a convex shape that protrudes from the front side surface of the first member toward the front side, and are arranged along the planned fracture portion;
A recess provided at a position corresponding to the protrusion on the back surface of the first member, the first breaking recess where the bottom of the first member enters the inside of the protrusion,
A recess provided on the back surface of the first member, the bottom of which is formed so as to have a step with the bottom of the first breaking recess, and functions as the planned breaking portion together with the first breaking recess. 2 fracture recesses,
The second member covers the front side of the first member such that the protruding end of the protruding portion is exposed to the front side of the second member, and the front side surface of the second member together with the protruding end of the protruding portion Constituting a front side surface of the vehicle interior member,
The front surface of the second member is formed with a recessed portion that is recessed around the protruding portion,
The second breaking recess is a line extending in the front and back direction through the position where one of the two side surfaces along the alignment direction of the projecting portion is in contact with the recess. The vehicle interior member, wherein the bottoms of the second fracture recesses are provided so as to intersect each other . 前記突出部におけるそれらの並び方向に沿う２つの側面は、該突出部の根元側から突出端側へ向かうにつれて互いに近づくように傾斜形成される請求項１記載の車両内装部材。 2. The vehicle interior member according to claim 1, wherein two side surfaces of the projecting portion along the arrangement direction are inclined so as to approach each other from the base side to the projecting end side of the projecting portion. 前記第２破断凹部は、前記突出部におけるそれらの並び方向に沿う２つの側面のうち、前記破断予定部に囲まれた部分がある側の側面を通る前記ラインに、該第２破断凹部の底が交差するよう設けられている請求項１または２記載の車両内装部材。 The second breaking recess has a bottom line of the second breaking recess on the line passing through the side surface of the protruding portion of the two side surfaces along the arrangement direction of the protruding portion . The vehicle interior member according to claim 1, wherein the vehicle interior members are provided so as to intersect each other . 前記突出部の突出端には、糸の撚り目に見える筋状の凹凸が設けられ、
前記第１部材に設けられ、前記第２部材の表側において糸目に見えるように間隔をあけて並ぶ複数の前記突出部と、前記第２部材に設けられ、該突出部に向かうにつれて凹む前記陥凹部とにより、擬似的なステッチ模様が構成されている請求項１〜３の何れか一項に記載の車両内装部材。 The projecting end of the projecting portion is provided with streak-like irregularities visible in the yarn strands ,
A plurality of the protrusions provided on the first member and arranged at intervals so as to be visible on the front side of the second member, and the recesses provided on the second member and recessed toward the protrusion. The vehicle interior member according to any one of claims 1 to 3 , wherein a pseudo stitch pattern is configured .
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