JP3689676B2 - Plastic molded product - Google Patents

Plastic molded product Download PDF

Info

Publication number
JP3689676B2
JP3689676B2 JP2002043360A JP2002043360A JP3689676B2 JP 3689676 B2 JP3689676 B2 JP 3689676B2 JP 2002043360 A JP2002043360 A JP 2002043360A JP 2002043360 A JP2002043360 A JP 2002043360A JP 3689676 B2 JP3689676 B2 JP 3689676B2
Authority
JP
Japan
Prior art keywords
rib
hollow
air
height
conditioning air
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
JP2002043360A
Other languages
Japanese (ja)
Other versions
JP2003236890A (en
Inventor
晋 寺岡
善久 万徳
Original Assignee
西川化成株式会社
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 西川化成株式会社 filed Critical 西川化成株式会社
Priority to JP2002043360A priority Critical patent/JP3689676B2/en
Publication of JP2003236890A publication Critical patent/JP2003236890A/en
Application granted granted Critical
Publication of JP3689676B2 publication Critical patent/JP3689676B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Instrument Panels (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、基部側に開放された高さの異なる中空リブが帯状に連続して射出成形されてなる樹脂成形品に関する技術分野に属する。
【0002】
【従来の技術】
従来より、この種の樹脂成形品として、例えば特開平9−323568号公報に開示されるように、車両用インストルメントパネル本体裏面に接合され、空調ユニットからの空調エアを車室内の各部へ導くための空調エアダクトが知られている。そして、この空調エアが通る複数の空調エア通路はインストルメントパネル本体裏面とその裏面に接合された空調エアダクトとによって構成されている。すなわち、空調エアダクトには複数の空調エア通路を区画するための隔壁となる中空リブが帯状に連続して形成されている。
【0003】
【発明が解決しようとする課題】
ところで、上記従来の構造において、限られたスペースで空調エア通路を広く確保するには、空調エア通路を区画するための隔壁となる中空リブの高さを高くするとともに、その高さの増大に応じて成形品の型抜き上先端を徐々に細くしていく必要がある。さらに、空調エアダクトの質量及び材料の量を抑えるには空調エアダクトの肉厚を薄く保つ必要がある。これらのことにより、射出成形時に用いる空調エアダクト用の金型形状も先端に向かって細くなる高さが高いものとならざるを得ず、長期間に亘る多数回の使用に伴い、空調エアダクトの成形時又は成形後の型抜き時に金型が破損するおそれがある。
【0004】
本発明は斯かる点に鑑みてなされたものであり、その目的とするところは、成形型によって成形される樹脂成形品の中空リブの形状に工夫を加えることにより、成形時又は成形後の型抜き時に成形型が破損するのを未然に防止しようとすることにある。
【0005】
【課題を解決するための手段】
上記の目的を達成するために、請求項1の発明の樹脂成形品では、基部側に開放され、中空部(40a)と中実リブ部(41)とを備えた中空リブ(40)が帯状に連続して射出成形され、上記中空リブ(40)のうち高さが所定以上となる範囲における中空リブ(40)は、その高さの中間位置よりも先端側が中実リブ部(41)に形成され、高さが上記所定の高さよりも低い中空リブ(40)は、基部側から先端まで全域にわたって中空部 (40a)が形成され、この中実リブ部(41)は、中空部(40a)の幅方向中央に帯状に立設され、上記中空リブ(40)のうち中空部(40a)が全域にわたって形成されている部分と、中空部(40a)及び中実リブ部(41)で形成されている部分との境界には、中実リブ部(41)の側面に対して垂直な段差部(40b)が形成されるようにする。
【0006】
すなわち、樹脂成形品は成形型を用いて射出成形される際、中空リブ(40)が全域にわたって中空部(40a)が形成されていると、中空リブ(40)の高さを高くするには、成形型の形状もそれに伴い高いものとせざるを得ないが、上記の構成によると、基部側に開放された高さの異なる帯状の中空リブ(40)のうち高さが所定以上となる範囲における中空リブ(40)は、その高さの中間位置よりも先端側が中実リブ部(41)に形成されているので中空部(40a)を成形する成形型の高さを抑えることができる。従って、樹脂成形品の中空リブ(40)の高さが高くなることによる成形型の強度の低下を防止して射出成形時又は成形後の型抜き時に成形型が破損するのを防ぐことができる。
【0007】
請求項2の発明では、中実リブ部(41)の側面に中空リブ(40)の高さ方向に延びる縦リブ(42)が一体に形成されるようにする。
【0008】
すなわち、中実リブ部(41)の肉厚が薄い場合、その部分の強度が中空リブ(40)のうち中空部(40a)が全域にわたって形成されている部分の強度よりも低下してしまうので、その中実リブ部(41)を厚くする必要があるが、上記の構成によると、中実リブ部(41)の側面に中空リブ(40)の高さ方向に延びる縦リブ(42)が一体に形成されているため、上記の如く中実リブ部(41)の肉厚を大きくすることなく、その強度を保つことができる。
【0009】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。図5は、本発明の実施形態に係る樹脂成形品としての空調エアダクトが接合された車両用インストルメントパネルPを示し、このインストルメントパネルPはその主体をなすインストルメントパネル本体1を備え、その内方で車幅方向に延びるインパネレインフォースメント(図示せず)に支持されて車体に取り付けられている。上記インストルメントパネル本体1は、樹脂材料を射出成形してなり、フロントウインド(図示せず)下端部近傍から車室内方(車体後方)へ略水平に延びる上壁部2と、この上壁部2の車体後端縁から下方へ延びる縦壁部3とを有する。尚、符号4は計器盤が装着されるメータフードであり、また符号5は助手席用エアバッグ装置(図示せず)の配設部である。従って、この実施形態のインストルメントパネルPは運転席が車体左側に位置する左ハンドル車用のものである。
【0010】
上記インストルメントパネル本体1の上壁部2表面の車体前側には、車幅方向略全体に亘って延びるフロントデフロスタ吹出口7が形成されているとともに、このフロントデフロスタ吹出口7の車体後方でインストルメントパネル本体1の車幅方向両端縁部近傍には、サイドデフロスタ吹出口8,8がそれぞれ形成されている。また、インストルメントパネル本体1の縦壁部3表面には、車幅方向略中央部及び両端縁部近傍にそれぞれセンタエア吹出口10〜12及びサイド吹出口9,9が形成されている。このセンタエア吹出口10〜12は、同じ円形状のものが車幅方向に互いに離れて3つ並設されており、助手席側から順に第1吹出口10、第2吹出口11及び第3吹出口12とされている。
【0011】
上記インストルメントパネル本体1の下方には、空調ユニット(図示せず)が配設されるとともに、この空調ユニットで生成された空調エアを上記各吹出口7〜12へ導くための空調エア通路17〜20が設けられており、この空調エア通路17〜20はインストルメントパネル本体1とこのインストルメントパネル本体1の裏面(下面)に接合された空調エアダクト15とから構成されている。
【0012】
上記空調エアダクト15は、図4に示すように、樹脂材料を射出成形してなるパネル状のもので、全体としてインストルメントパネル本体1の上壁部2に対応する大きさ及び形状を有する。この空調エアダクト15の車体前端側には、断面略矩形のデフロスタ用溝部16が車幅方向全体に亘って形成されていて、図5に示すように、このデフロスタ用溝部16とインストルメントパネル本体1の上壁部2とにより、上記フロントデフロスタ吹出口7及びサイドデフロスタ吹出口8,8に接続されるデフロスタ用空調エア通路17が構成されている。このデフロスタ用溝部16の底壁部の車幅方向略中央部には、上記空調ユニットに接続されるデフロスタ用空調エア取入口23が形成されている。
【0013】
また、図5にも示すように、上記空調エアダクト15の運転席側には上記インストルメントパネル本体1のメータフード4に対応した切欠部25が形成される一方、助手席側にはエアバッグ装置の配設部5に対応した開口部26が形成されている。そして、これら切欠部25及び開口部26の間には、略矩形のセンタ凹部28が形成されていて、このセンタ凹部28と上記インストルメントパネル本体1の上壁部2とによって上記インストルメントパネル本体1の第1〜第3吹出口10〜12に接続されるセンタ用空調エア通路18が構成されている。上記センタ凹部28の車体前側の前側壁部29は空調エアダクト15の車体前後方向略中央部に位置していて、このセンタ凹部28の前側壁部29及び後側壁部30は対向して互いに略平行に車幅方向に延びる一方、運転席側壁部31及び助手席側壁部(図示せず)も互いに略平行に車体前後方向に延びている。
【0014】
また、図4及び図5に示すように、上記センタ凹部28の運転席側及び助手席側には、そこからインストルメントパネル本体1のサイド吹出口9,9まで延びるサイド用空調エア通路19,20を構成する断面略矩形のサイド用溝部36,37がそれぞれ形成されている。運転席側サイド用溝部36は、上記メータフード4に対応する切欠部25の周囲を周り込むように設けられる一方、助手席側サイド用溝部37は助手席用エアバッグ装置の配設用開口部26の車体後側を周り込むように形成されている。すなわち、上記運転席側サイド用溝部36とインストルメントパネル本体1の上壁部2とによって上記運転席側サイド用空調エア通路19が構成され、また上記助手席側サイド用溝部37とインストルメントパネル本体1の上壁部2とによって上記助手席側サイド用エア通路20が構成されている。
【0015】
そして、上記デフロスタ用空調エア取入口23と上記センタ凹部28との間には、上記空調エアユニットに接続されるセンタ用空調エア取入口24が開口され、上記運転席側サイド用溝部36のセンタ凹部28側端部近傍には、上記空調ユニットに接続される運転席側サイド用空調エア取入口38が形成されている。
【0016】
上記センタ凹部28の車体前側壁部29には、上記センタ用空調エア取入口24から取り入れた空調エアを上記センタ凹部28に導入するための空調エア取入口34が形成される一方、後側壁部30には、インストルメントパネル本体1の第1〜第3吹出口10〜12のそれぞれに対応するように3つの切欠部35,35,…が形成されている。従って、上記空調エア取入口34からセンタ用空調エア通路18(センタ凹部28)内に流入した空調エアは車体後方へ流れ、各切欠部35から第1〜第3吹出口10〜12を介して車室に吹き出すようになっている。
【0017】
また、上記空調エアダクト15の車体前後方向の両端縁部、各溝部16,36,37の上端部及びエアバッグ配設用開口部26の周縁部等には突条部43,43,…(図1に示す)が形成されていて、この突条部43,43,…をインストルメントパネル本体1の裏面に振動溶着することで、空調エアダクト15がインストルメントパネル本体1へ接合されるとともに、各空調エア通路17〜20からの空調エアの漏れが防止される。
【0018】
さらに、図2、図3及び図5に示すように、デフロスタ用溝部16の壁面と運転席側サイド用溝部36の壁面とによって、デフロスタ用空調エア通路17と運転席側サイド用空調エア通路19とを区画する隔壁をなす中空リブ40が形成されている。この中空リブ40は、基部側(インストルメントパネル本体1と反対側)に開放された中空部40aを有する中空構造のもので、図2に示すように、上記運転席側サイド吹出口9側と運転席側サイド用空調エア取入口38側とでは高さが異なり、上記運転席側サイド吹出口9から運転席側サイド用空調エア取入口38に向かって徐々にその高さが高くなるように帯状に連続して射出成形されている。
【0019】
そして、本発明の特徴として、図1(a)に示すように、中空リブ40の高さHが所定の高さよりも低い中空リブ40は、その基部側からその先端まで徐々に細くなり全域にわたって中空部40aが形成された中空構造とされている。一方、中空リブ40の高さHが所定以上となる範囲における運転席側サイド用空調エア取入口38側の中空リブ40は、図1(b)に示すように、その中空リブ40の高さの中間位置よりも基部側が中空部40aとされるとともにその中間位置よりも先端側が中実リブ部41に形成されている。そして、図2にも示すように、全域にわたって中空部40aが形成された中空リブ40の高さの中間位置よりも先端側と上記中実リブ部41との境界部分(隣接部分)には段差部40bが形成されている。
【0020】
上記中実リブ部41の肉厚t1は中空リブ40の肉厚t2と略同じ(t1≒t2)とされており、中実リブ部41の両側面には、中空リブ40の高さ方向に延びる複数の縦リブ42,42,…が互いに対向しかつ車幅方向に間隔を有して一体に形成されている。そして、中実リブ部41の先端は上記縦リブ42,42,…よりも若干突出しており、この中実リブ部41の先端が上記突部43,43,…と同じ役割を果たして上記インストルメントパネル本体1の裏面に振動溶着により接合される。
【0021】
上述の如く構成されたインストルメントパネルPの空調エア通路17〜20では、上記空調ユニットを駆動すると、図4に矢印で示すように、空気エアが空調エアダクト15に流れるようになっている。
【0022】
従って、限られたスペースで空調エア通路17,19を広くするためには、相異なる2つの空調エア通路17,19を区画するための隔壁となる中空リブ40の高さを高くするとともに、先端を徐々に細くしてデフロスタ用溝部16及び運転席側サイド用溝部36を深くかつ広くする必要がある。さらに、空調エアダクト15の材料の量を抑えるには空調エアダクト15の肉厚を薄く保つ必要がある。これらのことにより、空調エアダクト15用の成形型の形状も先端に向かって細くなる高さが高いものとならざるを得ず、成形型の長期間に亘る多数回の使用に伴い、空調エアダクト15の成形時又は成形後の型抜き時に中空部40aを成形する成形型が破損するおそれがある。
【0023】
しかし、本実施形態に係る空調エアダクト15によると、中空リブ40のうち高さHが所定以上となる範囲において、その高さの中間位置よりも先端側中実リブ部41に形成されているため、中空部40aを形成する成形型の高さを抑えることができる。従って、空調エアダクト15の中空リブ40が高くなることによる成形型の強度の低下を防止して射出成形時又は成形後の型抜き時に成形型が破損するのを防ぐことができる。
【0024】
また、中実リブ部41の肉厚が薄い場合、その部分の強度が他の中空リブ40の強度よりも低下してしまうので、その中実リブ部41を厚くする必要があるが、中実リブ部41の側面に中空リブ40の高さ方向に延びる縦リブ42,42,…が一体に形成されているため、上記の如く中実リブ部41の肉厚を全体にわたって大きくすることなくその強度を保つことができる。
【0025】
尚、上記実施形態では、空調エアダクト15について説明したが、基部側に開放された高さの異なる中空リブが帯状に連続して射出成形された樹脂成形品であれば、本発明の適用が可能である。
【0026】
【発明の効果】
以上説明したように、請求項1の発明の射出成形品によると、帯状に連続して射出成形され、基部側に開放された高さの異なる中空リブ(40)のうち高さが所定以上となる範囲において、中空リブ(40)をその高さの中間位置よりも先端側を中実リブ部(41)に形成し、所定の高さよりも低い中空リブ(40)を基部側から先端まで全域にわたって中空部(40a)に形成したことにより、樹脂成形品の中空リブ(40)の高さが高くなることによる成形型の強度の低下を防止して射出成形時又は成形後の型抜き時に成形型が破損するのを防ぐことができる。
【0027】
請求項2の発明によると、中実リブ部の側面に中空リブ(40)の高さ方向に延びる縦リブ(42)が一体に形成されるようにしたことにより、中実リブ部(41)の肉厚を全体にわたって大きくすることなく中実リブ部(41)の強度を保つことができる。
【図面の簡単な説明】
【図1】 (a)は図3のI(a)−I(a)線断面図、(b)は図3のI(b)−I(b)線断面図である。
【図2】 図3におけるY方向矢視図である。
【図3】 本発明の実施形態に係る空調エアダクトにおける中空リブを先端側から見た平面図である。
【図4】 本発明の実施形態に係る空調エアダクトの運転席側部分を示す平面図である。
【図5】 空調エアダクトが接合された車両用インストルメントパネルの平面図である。
【符号の説明】
1 インストルメントパネル本体
15 空調エアダクト
17 デフロスタ用空調エア通路
19 運転席側サイド用空調エア通路
40 中空リブ
40a 中空部
40b 段差部
41 中実リブ部
42 縦リブ
[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to a technical field related to a resin molded product in which hollow ribs having different heights opened to the base side are continuously injection-molded in a strip shape.
[0002]
[Prior art]
Conventionally, as this type of resin molded product, as disclosed in, for example, Japanese Patent Laid-Open No. 9-323568, it is joined to the rear surface of the vehicle instrument panel body and guides air-conditioned air from the air-conditioning unit to each part in the vehicle interior. Air conditioning air ducts are known. The plurality of air-conditioning air passages through which the air-conditioning air passes are constituted by an instrument panel main body rear surface and an air-conditioning air duct joined to the rear surface. That is, the air-conditioning air duct is continuously formed with a hollow rib serving as a partition wall for partitioning a plurality of air-conditioning air passages.
[0003]
[Problems to be solved by the invention]
By the way, in the above conventional structure, in order to secure a wide air-conditioning air passage in a limited space, the height of the hollow rib serving as a partition for partitioning the air-conditioning air passage is increased and the height is increased. Accordingly, it is necessary to gradually narrow the top end of the molded product after being punched. Furthermore, it is necessary to keep the thickness of the air-conditioning air duct thin in order to suppress the mass of the air-conditioning air duct and the amount of material. Because of these, the mold shape for the air conditioning air duct used at the time of injection molding is inevitably high in height that narrows toward the tip, and the molding of the air conditioning air duct occurs with many uses over a long period of time. There is a risk that the mold may be damaged at the time of die cutting after molding.
[0004]
The present invention has been made in view of such points, and the object of the present invention is to add a device to the shape of the hollow rib of the resin molded product molded by the molding die, so that the mold during molding or after molding. The purpose is to prevent the mold from being damaged at the time of punching.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the resin molded product according to the first aspect of the present invention, the hollow rib (40) having a hollow portion (40a) and a solid rib portion (41), which is open to the base side, has a strip shape. The hollow rib (40) in the range in which the height of the hollow rib (40) is equal to or higher than a predetermined height of the hollow rib (40) is the solid rib portion (41) at the tip side of the intermediate position of the height. The hollow rib (40) formed and having a height lower than the predetermined height is formed with a hollow portion (40a) over the entire region from the base side to the tip , and the solid rib portion (41) is formed of the hollow portion (40a). ) Standing in the center in the width direction of the hollow rib (40), the hollow portion (40a) is formed over the entire region, the hollow portion (40a) and the solid rib portion (41) The solid rib part (41) side is at the boundary with the part So that the vertical stepped portion (40b) is formed for.
[0006]
That is, when the resin molded product is injection-molded using a mold, if the hollow rib (40a) is formed over the entire area of the hollow rib (40) , the height of the hollow rib (40) is increased. The shape of the mold must be increased accordingly, but according to the above configuration, the height of the band-shaped hollow ribs (40) having different heights opened to the base side is within a predetermined range. hollow ribs (40) in, because the distal end side than the middle position of the height are formed on the solid rib (41), it is possible to suppress the height of the mold for molding the hollow portion (40a) . Accordingly, it is possible to prevent the strength of the molding die from being lowered due to the height of the hollow rib (40) of the resin molded product, and to prevent the molding die from being damaged during injection molding or die cutting after molding. .
[0007]
In the invention of claim 2, the longitudinal rib (42) extending in the height direction of the hollow rib (40 ) is integrally formed on the side surface of the solid rib portion (41) .
[0008]
That is, when the thickness of the solid rib portion (41) is thin, the strength of the portion is lower than the strength of the hollow rib (40) where the hollow portion (40a) is formed over the entire area . The solid rib portion (41) needs to be thickened. According to the above configuration, the vertical rib (42) extending in the height direction of the hollow rib (40) is formed on the side surface of the solid rib portion (41). because it is formed integrally, without increasing the thickness of the solid rib (41) as described above, Ru can maintain its strength.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 5 shows an instrument panel P for a vehicle to which an air-conditioning air duct as a resin molded product according to an embodiment of the present invention is joined. The instrument panel P includes an instrument panel body 1 that forms the main body thereof, It is supported by an instrument panel reinforcement (not shown) extending inward in the vehicle width direction and attached to the vehicle body. The instrument panel main body 1 is formed by injection molding a resin material, and extends from the vicinity of the lower end portion of a front window (not shown) to the vehicle interior (rear side of the vehicle body) substantially horizontally, and the upper wall portion. 2 and a vertical wall portion 3 extending downward from the rear end edge of the vehicle body. Reference numeral 4 denotes a meter hood on which an instrument panel is mounted, and reference numeral 5 denotes an arrangement portion of a passenger seat airbag device (not shown). Therefore, the instrument panel P of this embodiment is for a left-hand drive vehicle in which the driver's seat is located on the left side of the vehicle body.
[0010]
A front defroster outlet 7 extending substantially over the entire vehicle width direction is formed on the front side of the vehicle body on the surface of the upper wall 2 of the instrument panel body 1, and the instrument is located behind the front defroster outlet 7 in the vehicle body. Side defroster air outlets 8 and 8 are formed in the vicinity of both ends in the vehicle width direction of the ment panel body 1. Further, center air outlets 10 to 12 and side outlets 9 and 9 are formed on the surface of the vertical wall portion 3 of the instrument panel main body 1 in a substantially central portion in the vehicle width direction and in the vicinity of both edge portions, respectively. The center air outlets 10 to 12 have the same circular shape and are arranged side by side in the vehicle width direction, and are arranged in parallel, and the first air outlet 10, the second air outlet 11, and the third air outlet are sequentially arranged from the passenger seat side. The outlet 12 is used.
[0011]
An air conditioning unit (not shown) is disposed below the instrument panel body 1, and an air conditioning air passage 17 for guiding the air conditioning air generated by the air conditioning unit to the outlets 7-12. -20 are provided, and the air-conditioning air passages 17-20 are composed of an instrument panel main body 1 and an air-conditioning air duct 15 joined to the back surface (lower surface) of the instrument panel main body 1.
[0012]
As shown in FIG. 4, the air-conditioning air duct 15 has a panel shape formed by injection molding a resin material, and has a size and a shape corresponding to the upper wall portion 2 of the instrument panel main body 1 as a whole. A defroster groove 16 having a substantially rectangular cross section is formed on the front end side of the air conditioning air duct 15 over the entire vehicle width direction. As shown in FIG. 5, the defroster groove 16 and the instrument panel main body 1 are formed. The upper wall portion 2 forms a defroster air conditioning air passage 17 connected to the front defroster outlet 7 and the side defroster outlets 8 and 8. A defroster air conditioning air inlet 23 connected to the air conditioning unit is formed at a substantially central portion in the vehicle width direction of the bottom wall of the defroster groove 16.
[0013]
Further, as shown in FIG. 5, a notch 25 corresponding to the meter hood 4 of the instrument panel body 1 is formed on the driver seat side of the air conditioning air duct 15, while an airbag device is provided on the passenger seat side. An opening 26 corresponding to the arrangement portion 5 is formed. A substantially rectangular center recess 28 is formed between the notch 25 and the opening 26, and the instrument panel body is formed by the center recess 28 and the upper wall 2 of the instrument panel body 1. A center air-conditioning air passage 18 connected to the first to third outlets 10 to 12 is configured. A front side wall 29 on the vehicle body front side of the center recess 28 is located at a substantially central part in the vehicle longitudinal direction of the air conditioning air duct 15, and the front side wall 29 and the rear side wall 30 of the center recess 28 face each other and are substantially parallel to each other. While extending in the vehicle width direction, the driver's seat side wall portion 31 and the passenger seat side wall portion (not shown) also extend substantially parallel to each other in the longitudinal direction of the vehicle body.
[0014]
Further, as shown in FIGS. 4 and 5, on the driver seat side and the passenger seat side of the center recess 28, side air conditioning air passages 19 extending from there to the side outlets 9, 9 of the instrument panel body 1, Side groove portions 36 and 37 having a substantially rectangular cross section constituting 20 are formed. The driver seat side groove 36 is provided so as to go around the notch 25 corresponding to the meter hood 4, while the passenger seat side groove 37 is an opening for disposing the passenger seat airbag device. 26 is formed so as to go around the rear side of the vehicle body. That is, the driver seat side side air-conditioning air passage 19 is constituted by the driver seat side side groove portion 36 and the upper wall portion 2 of the instrument panel main body 1, and the passenger seat side side groove portion 37 and the instrument panel are formed. The passenger seat side air passage 20 is constituted by the upper wall portion 2 of the main body 1.
[0015]
A center air-conditioning air inlet 24 connected to the air-conditioning air unit is opened between the defroster air-conditioning air inlet 23 and the center recess 28, and the center of the driver-side side groove 36 is opened. In the vicinity of the end portion on the recess 28 side, a driver seat side side air conditioning air intake 38 connected to the air conditioning unit is formed.
[0016]
The vehicle body front side wall 29 of the center recess 28 is formed with an air-conditioning air intake 34 for introducing the air-conditioning air taken in from the center air-conditioning air intake 24 into the center recess 28. 30 is formed with three notches 35, 35,... Corresponding to the first to third outlets 10 to 12 of the instrument panel main body 1. Therefore, the air-conditioning air that has flowed into the center air-conditioning air passage 18 (center recess 28) from the air-conditioning air inlet 34 flows to the rear of the vehicle body and passes through the first to third outlets 10-12 from the notches 35. It is designed to blow out into the passenger compartment.
[0017]
Further, protrusions 43, 43,... Are provided on both ends of the air-conditioning air duct 15 in the longitudinal direction of the vehicle body, the upper ends of the grooves 16, 36, 37, the peripheral edge of the opening 26 for arranging the airbag, etc. 1) is formed, and the air-conditioning air duct 15 is joined to the instrument panel main body 1 by vibration welding the protrusions 43, 43,... To the back surface of the instrument panel main body 1. Leakage of air-conditioning air from the air-conditioning air passages 17 to 20 is prevented.
[0018]
Further, as shown in FIGS. 2, 3, and 5, the defroster air conditioning air passage 17 and the driver seat side air conditioning air passage 19 are formed by the wall surface of the defroster groove portion 16 and the wall surface of the driver seat side groove portion 36. The hollow rib 40 which forms the partition which divides and is formed. The hollow rib 40 has a hollow structure having a hollow portion 40a opened on the base side (opposite side to the instrument panel body 1), and as shown in FIG. The height is different from that on the side of the air-conditioning air inlet 38 for the driver's side, and the height gradually increases from the side air outlet 9 for the driver's seat toward the air-conditioning air inlet 38 for the driver's side. It is continuously injection-molded in a strip shape.
[0019]
As a feature of the present invention, as shown in FIG. 1 (a), the hollow rib 40 whose height H is lower than a predetermined height is gradually narrowed from its base side to its tip, and extends over the entire area. The hollow structure is formed with a hollow portion 40a. On the other hand, the hollow rib 40 on the side of the air-conditioning air inlet 38 for the driver's seat side in the range where the height H of the hollow rib 40 is equal to or greater than a predetermined level is as shown in FIG. The hollow portion 40a is formed on the base side of the intermediate position, and the solid rib portion 41 is formed on the tip side of the intermediate position. As shown in FIG. 2, a step is formed at the boundary portion (adjacent portion) between the tip end side and the solid rib portion 41 with respect to the intermediate position of the height of the hollow rib 40 in which the hollow portion 40a is formed over the entire area. A portion 40b is formed.
[0020]
The thickness t1 of the solid rib portion 41 is substantially the same as the thickness t2 of the hollow rib 40 (t1≈t2), and the both sides of the solid rib portion 41 are arranged in the height direction of the hollow rib 40. A plurality of extending vertical ribs 42, 42,... Are opposed to each other and are integrally formed with an interval in the vehicle width direction. Then, in the tip of the solid rib 41 above the longitudinal ribs 42, 42 ... are protruded slightly from the tip is the butt strip portions 43 and 43 of the actual rib 41 therein, the play the same role ... and Insutoru It is joined to the back surface of the ment panel body 1 by vibration welding.
[0021]
In the air conditioning air passages 17 to 20 of the instrument panel P configured as described above, when the air conditioning unit is driven, air air flows into the air conditioning air duct 15 as indicated by arrows in FIG.
[0022]
Therefore, in order to widen the air-conditioning air passages 17 and 19 in a limited space, the height of the hollow rib 40 serving as a partition for partitioning two different air-conditioning air passages 17 and 19 is increased, and the tip Needs to be gradually narrowed to make the defroster groove 16 and the driver side groove 36 deeper and wider. Furthermore, in order to suppress the amount of material of the air conditioning air duct 15, it is necessary to keep the thickness of the air conditioning air duct 15 thin. For these reasons, the shape of the molding die for the air conditioning air duct 15 must also be high so that it narrows toward the tip, and the air conditioning air duct 15 is used with the molding die being used many times over a long period of time. There is a possibility that the molding die for molding the hollow portion 40a may be damaged at the time of molding or during die cutting after molding.
[0023]
However, according to the air-conditioning air duct 15 according to the present embodiment, the hollow rib 40 is formed in the solid rib portion 41 at the front end side with respect to the intermediate position of the height in a range where the height H is not less than a predetermined value. The height of the mold for forming the hollow portion 40a can be suppressed. Therefore, it is possible to prevent the strength of the molding die from being lowered due to the height of the hollow rib 40 of the air-conditioning air duct 15 and to prevent the molding die from being damaged at the time of injection molding or die cutting after molding.
[0024]
In addition, when the thickness of the solid rib portion 41 is thin, the strength of the portion is lower than the strength of the other hollow ribs 40. Therefore, the solid rib portion 41 needs to be thickened. Since the vertical ribs 42, 42,... Extending in the height direction of the hollow rib 40 are integrally formed on the side surface of the rib portion 41, the thickness of the solid rib portion 41 can be increased without increasing the thickness as described above. Strength can be maintained.
[0025]
In the above-described embodiment, the air-conditioning air duct 15 has been described. However, the present invention can be applied to any resin molded product in which hollow ribs having different heights opened on the base side are continuously injection-molded in a strip shape. It is.
[0026]
【The invention's effect】
As explained above, according to the injection-molded article of the invention of claim 1, the height of the hollow ribs (40) having different heights which are continuously injection-molded in a band shape and opened to the base side is not less than a predetermined value. In this range, the hollow rib (40) is formed in the solid rib portion (41) on the tip side with respect to the intermediate position of the height, and the hollow rib (40) lower than the predetermined height is entirely formed from the base side to the tip. By forming the hollow portion (40a) over the entire length, the height of the hollow rib (40) of the resin molded product is prevented from increasing, and thus the strength of the molding die is prevented from being lowered. It is possible to prevent the mold from being damaged.
[0027]
According to the second aspect of the present invention, the vertical rib (42) extending in the height direction of the hollow rib (40 ) is integrally formed on the side surface of the solid rib portion, so that the solid rib portion (41) is formed. Ru can keep the strength of the actual rib portion (41) within without increasing the thickness of the throughout.
[Brief description of the drawings]
1A is a cross-sectional view taken along line I (a) -I (a) in FIG. 3, and FIG. 1B is a cross-sectional view taken along line I (b) -I (b) in FIG.
FIG. 2 is a view in the Y direction in FIG.
FIG. 3 is a plan view of a hollow rib in an air-conditioning air duct according to an embodiment of the present invention as viewed from the tip side.
FIG. 4 is a plan view showing a driver seat side portion of the air-conditioning air duct according to the embodiment of the present invention.
FIG. 5 is a plan view of a vehicle instrument panel to which an air conditioning air duct is joined.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Instrument panel body 15 Air-conditioning air duct 17 Air-conditioning air passage for defrosters 19 Air-conditioning air passage for driver side side 40 Hollow rib 40a Hollow part
40b Stepped portion 41 Solid rib portion 42 Vertical rib

Claims (2)

基部側に開放され、中空部(40a)と中実リブ部(41)とを備えた中空リブ(40)が帯状に連続して射出成形され、
上記中空リブ(40)のうち高さが所定以上となる範囲における中空リブ(40)は、その高さの中間位置よりも先端側が中実リブ部(41)に形成され、高さが上記所定の高さよりも低い中空リブ(40)は、基部側から先端まで全域にわたって中空部(40a)が形成され、
上記中実リブ部(41)は、中空部(40a)の幅方向中央に帯状に立設され、
上記中空リブ(40)のうち中空部(40a)が全域にわたって形成されている部分と、中空部(40a)及び中実リブ部(41)で形成されている部分との境界には、中実リブ部(41)の側面に対して垂直な段差部(40b)が形成されていることを特徴とする樹脂成形品。
A hollow rib (40) provided with a hollow portion (40a) and a solid rib portion (41) is continuously formed into a strip shape, and is opened to the base side.
The hollow rib hollow rib (40) in a range where the height is a predetermined or more of (40) is formed on the distal end side solid rib portion than the middle position of the height (41), the said predetermined height The hollow rib (40) lower than the height of the hollow portion (40a) is formed over the entire region from the base side to the tip,
The solid rib portion (41) is erected in a band shape at the center in the width direction of the hollow portion (40a),
Of the hollow rib (40), a solid portion is formed at the boundary between a portion where the hollow portion (40a) is formed over the entire area and a portion formed by the hollow portion (40a) and the solid rib portion (41). A resin molded product, wherein a stepped portion (40b) perpendicular to the side surface of the rib portion (41) is formed .
請求項1の樹脂成形品において、
中実リブ部(41)の側面に中空リブ(40)の高さ方向に延びる縦リブ(42)が一体に形成されていることを特徴とする樹脂成形品。
In the resin molded product according to claim 1,
A resin molded product, wherein a longitudinal rib (42) extending in a height direction of the hollow rib (40 ) is integrally formed on a side surface of the solid rib portion (41) .
JP2002043360A 2002-02-20 2002-02-20 Plastic molded product Expired - Fee Related JP3689676B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002043360A JP3689676B2 (en) 2002-02-20 2002-02-20 Plastic molded product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002043360A JP3689676B2 (en) 2002-02-20 2002-02-20 Plastic molded product

Publications (2)

Publication Number Publication Date
JP2003236890A JP2003236890A (en) 2003-08-26
JP3689676B2 true JP3689676B2 (en) 2005-08-31

Family

ID=27783181

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002043360A Expired - Fee Related JP3689676B2 (en) 2002-02-20 2002-02-20 Plastic molded product

Country Status (1)

Country Link
JP (1) JP3689676B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010083155A (en) * 2008-09-29 2010-04-15 Toyoda Gosei Co Ltd Fixing structure of vehicle instrument panel
JP6553899B2 (en) * 2015-03-11 2019-07-31 スタンレー電気株式会社 Reinforcing structure of housing in vehicular lamp

Also Published As

Publication number Publication date
JP2003236890A (en) 2003-08-26

Similar Documents

Publication Publication Date Title
US7219953B2 (en) Cowl cover with integrated washer fluid passageway
US8821225B2 (en) Vehicle instrument panel
EP1602517B1 (en) Air blowout outlet structure for vehicle
US20160075310A1 (en) Front defroster nozzle device
US7275611B2 (en) Aerodynamically constructed covering part for the underside of a passenger car, and method of making same
JP6647174B2 (en) Vehicle air conditioner
JP4975313B2 (en) Vehicle cowl top cover
JP3689676B2 (en) Plastic molded product
JP6576105B2 (en) register
KR20210077996A (en) Manufacturing method of automobile vent duct mold
JP4307173B2 (en) Cooler unit for vehicle ceiling
JP4895776B2 (en) duct
JP4367110B2 (en) Air outlet structure for vehicles
JPH11141965A (en) Air guide structure for bent part of air duct
JP4302833B2 (en) Front structure of vehicle compartment
JP2021107172A (en) Instrument panel structure
KR101178411B1 (en) Defrosting system for car
JP2010111207A (en) Air guide device for vehicular air conditioner
KR100613707B1 (en) Vent-duct in a car and there of cast
JP3651237B2 (en) Vehicle air conditioner
JP6109000B2 (en) Defroster
JP3994334B2 (en) Reinforce bar
KR102084049B1 (en) Defroster having air flow distribution structure
KR102084046B1 (en) Defroster having air flow distribution structure
JP3588606B2 (en) Air-conditioning air duct structure for vehicle instrument panel

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20041209

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20050105

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050303

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: 20050531

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050613

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

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

Free format text: PAYMENT UNTIL: 20090617

Year of fee payment: 4

LAPS Cancellation because of no payment of annual fees