JP2021138096A - Resin molding - Google Patents

Resin molding Download PDF

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Publication number
JP2021138096A
JP2021138096A JP2020039231A JP2020039231A JP2021138096A JP 2021138096 A JP2021138096 A JP 2021138096A JP 2020039231 A JP2020039231 A JP 2020039231A JP 2020039231 A JP2020039231 A JP 2020039231A JP 2021138096 A JP2021138096 A JP 2021138096A
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Japan
Prior art keywords
boss portion
resin molded
molded product
boss
product according
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Japanese (ja)
Inventor
匡嘉 岩渕
Masayoshi Iwabuchi
匡嘉 岩渕
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Resonac Corp
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Showa Denko Materials Co Ltd
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Priority to JP2020039231A priority Critical patent/JP2021138096A/en
Priority to RU2021109234A priority patent/RU2767215C1/en
Publication of JP2021138096A publication Critical patent/JP2021138096A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes

Abstract

To provide a resin molding including a configuration having a boss part formed on an opposite surface of an opposite side of a design surface, with suppressed sink at a part corresponding to the boss part on the design surface while securing the strength of the boss part.SOLUTION: A resin molding for a vehicle comprises: a body part having a design surface and an opposite surface; a boss part projecting from the opposite surface of the body part and having a hollow part formed toward a bottom side from a top face; and a plurality of projections formed in a circumferential direction on a circumference of the boss part with gaps therebetween and extending along a projection direction of the boss part from the opposite surface.SELECTED DRAWING: Figure 1

Description

本開示は、樹脂成形品に関する。 The present disclosure relates to resin molded products.

近年、自動車の燃費向上を目的として、部品の材質を金属から樹脂に変更する例が増えてきている。自動車用の樹脂成形品には、部品締結のためにボス部と呼ばれる凸形状を設けることがある。このようなボス部としては、例えば、特許文献１に開示されたボス部がある。 In recent years, there have been an increasing number of cases in which the material of parts is changed from metal to resin for the purpose of improving the fuel efficiency of automobiles. Resin molded products for automobiles may be provided with a convex shape called a boss portion for fastening parts. As such a boss portion, for example, there is a boss portion disclosed in Patent Document 1.

実開昭６０−６２６１０号公報Jitsukaisho 60-62610

ところで、樹脂成形品にボス部を成形する場合、ボス部の成形側と反対側の面（反対面）であってボス部に対応する部分に、樹脂材料の収縮に起因するヒケと呼ばれる窪みが生じやすい。樹脂成形品の反対面が意匠面に当たる場合、ヒケの発生を抑制することが望まれる。 By the way, when a boss portion is molded on a resin molded product, a dent called a sink mark due to shrinkage of the resin material is formed on the surface (opposite surface) of the boss portion opposite to the molding side and corresponding to the boss portion. It is easy to occur. When the opposite surface of the resin molded product hits the design surface, it is desirable to suppress the occurrence of sink marks.

そこで、本開示は、意匠面に対して反対側の反対面にボス部が形成される構成において、ボス部の強度を確保しつつ、意匠面におけるボス部に対応する部分にヒケが生じるのを抑制した樹脂成形品を提供することを課題とする。 Therefore, in the present disclosure, in a configuration in which the boss portion is formed on the opposite surface to the design surface, sink marks occur in the portion of the design surface corresponding to the boss portion while ensuring the strength of the boss portion. An object of the present invention is to provide a suppressed resin molded product.

上記課題を解決するための手段には、以下の実施態様が含まれる。
＜１＞
車両用の樹脂成形品であって、
意匠面と反対面とを有する本体部と、
前記本体部の前記反対面から突出すると共に頂面から根元側に向けて中空部が形成されたボス部と、
前記ボス部の外周に周方向に間隔をあけて形成され、前記反対面から前記ボス部の突出方向に沿って延びる複数の突部と、
を備える樹脂成形品。
＜２＞
前記突部は、前記ボス部の外周に周方向に等間隔で形成されている、＜１＞
に記載の樹脂成形品。
＜３＞
前記ボス部の厚みは、前記突部の厚みよりも厚い、＜１＞又は＜２＞に記載の樹脂成形品。
＜４＞
前記突部は、前記反対面から前記ボス部の頂面まで延びている、＜１＞〜＜３＞のいずれか１項に記載の樹脂成形品。
＜５＞
前記ボス部の厚みが、前記中空部の前記頂面における開口の幅以下である、＜１＞〜＜４＞のいずれか１項に記載の樹脂成形品。

＜６＞
前記中空部には、ねじ部材が捩じ込まれるようになっており、
前記ボス部の厚みが、前記ねじ部材の呼び径以下である、＜１＞〜＜４＞のいずれか１項に記載の樹脂成形品。
＜７＞
前記突部における前記ボス部と反対側の側面の少なくとも一部は、前記ボス部の根元側から頂面側に向けて前記ボス部の外周面からの距離が次第に短くなるように傾斜している、＜１＞〜＜６＞のいずれか１項に記載の樹脂成形品。
＜８＞
複数の前記突部は、同一寸法形状である、＜１＞〜＜７＞のいずれか１項に記載の樹脂成形品。
＜９＞
前記樹脂成形品が、インナーパネルである、＜１＞〜＜８＞のいずれか１項に記載の樹脂成形品。 Means for solving the above problems include the following embodiments.
<1>
It is a resin molded product for vehicles,
The main body, which has a design surface and an opposite surface,
A boss portion that protrudes from the opposite surface of the main body portion and has a hollow portion formed from the top surface toward the root side.
A plurality of protrusions formed on the outer periphery of the boss portion at intervals in the circumferential direction and extending from the opposite surface along the projecting direction of the boss portion.
Resin molded product.
<2>
The protrusions are formed on the outer periphery of the boss portion at equal intervals in the circumferential direction, <1>.
The resin molded product described in.
<3>
The resin molded product according to <1> or <2>, wherein the thickness of the boss portion is thicker than the thickness of the protrusion portion.
<4>
The resin molded product according to any one of <1> to <3>, wherein the protrusion extends from the opposite surface to the top surface of the boss portion.
<5>
The resin molded product according to any one of <1> to <4>, wherein the thickness of the boss portion is equal to or less than the width of the opening on the top surface of the hollow portion.

<6>
A screw member is screwed into the hollow portion.
The resin molded product according to any one of <1> to <4>, wherein the thickness of the boss portion is equal to or less than the nominal diameter of the screw member.
<7>
At least a part of the side surface of the protrusion opposite to the boss portion is inclined so that the distance from the outer peripheral surface of the boss portion gradually decreases from the root side to the top surface side of the boss portion. , The resin molded product according to any one of <1> to <6>.
<8>
The resin molded product according to any one of <1> to <7>, wherein the plurality of protrusions have the same dimensions and shape.
<9>
The resin molded product according to any one of <1> to <8>, wherein the resin molded product is an inner panel.

本開示によれば、意匠面に対して反対側の反対面にボス部が形成される構成において、ボス部の強度を確保しつつ、意匠面におけるボス部に対応する部分にヒケが生じるのを抑制した樹脂成形品を提供することができる。 According to the present disclosure, in a configuration in which a boss portion is formed on the opposite surface to the design surface, sink marks occur in the portion of the design surface corresponding to the boss portion while ensuring the strength of the boss portion. It is possible to provide a suppressed resin molded product.

本開示の一実施形態の樹脂成形品のボス部の正面図である。It is a front view of the boss part of the resin molded article of one Embodiment of this disclosure. 図１で示すボス部の２Ｘ−２Ｘ線断面図である。It is a 2X-2X line sectional view of the boss part shown in FIG. 図１で示すボス部の３Ｘ−３Ｘ線断面図であり、ボス部に内蔵部品が取り付けられた状態を示している。It is a 3X-3X line sectional view of the boss part shown in FIG. 1, and shows the state in which the built-in component is attached to the boss part. その他の実施形態の樹脂成形品のボス部の正面図である。It is a front view of the boss part of the resin molded article of another embodiment. 図４で示すボス部の５Ｘ−５Ｘ線断面図である。FIG. 5 is a cross-sectional view taken along the line 5X-5X of the boss portion shown in FIG. その他の実施形態の樹脂成形品のボス部の正面図である。It is a front view of the boss part of the resin molded article of another embodiment. その他の実施形態の樹脂成形品のボス部の断面図（図２に対応する断面図）である。It is sectional drawing (cross-sectional view corresponding to FIG. 2) of the boss part of the resin molded article of another embodiment. その他の実施形態の樹脂成形品のボス部の正面図である。It is a front view of the boss part of the resin molded article of another embodiment. その他の実施形態の樹脂成形品のボス部の正面図である。It is a front view of the boss part of the resin molded article of another embodiment. その他の実施形態の樹脂成形品のボス部の断面図（図３に対応する断面図）であり、ボス部に内蔵部品が取り付けられた状態を示している。It is sectional drawing (cross-sectional view corresponding to FIG. 3) of the boss part of the resin molded article of another embodiment, and shows the state in which the built-in component is attached to the boss part.

以下、本開示を実施するための形態について詳細に説明する。但し、本開示は以下の実施形態に限定されるものではない。以下の実施形態において、その構成要素は、特に明示した場合を除き、必須ではない。数値及びその範囲についても同様であり、本開示を制限するものではない。 Hereinafter, modes for carrying out the present disclosure will be described in detail. However, the present disclosure is not limited to the following embodiments. In the following embodiments, the components are not required unless otherwise specified. The same applies to the numerical values and their ranges, and does not limit this disclosure.

まず、本実施形態の樹脂成形品について説明する。 First, the resin molded product of the present embodiment will be described.

＜樹脂成形品＞
本実施形態の樹脂成形品は、車両用の樹脂成形品であって、意匠面と反対面とを有する本体部と、前記本体部の前記反対面から突出すると共に頂面から根元側に向けて中空部が形成されたボス部と、前記ボス部の外周に周方向に間隔をあけて形成され、前記反対面から前記ボス部の突出方向に沿って延びる複数の突部と、を備える。以下、樹脂成形品の具体例を、図面を参照しながら説明するが、本開示はこれに限定されるものではない。 <Resin molded product>
The resin molded product of the present embodiment is a resin molded product for a vehicle, and is a resin molded product for a vehicle, which protrudes from the main body portion having a surface opposite to the design surface and the opposite surface of the main body portion and toward the root side from the top surface. It includes a boss portion in which a hollow portion is formed, and a plurality of protrusions formed on the outer periphery of the boss portion at intervals in the circumferential direction and extending from the opposite surface along the projecting direction of the boss portion. Hereinafter, specific examples of the resin molded product will be described with reference to the drawings, but the present disclosure is not limited thereto.

本実施形態の樹脂成形品２０は、図３に示されるように、車両の一例である自動車の内装部品として用いられる。具体的には、樹脂成形品２０は、自動車のインナーパネル、特に、バックドアのインナーパネルとして用いられる。 As shown in FIG. 3, the resin molded product 20 of the present embodiment is used as an interior part of an automobile, which is an example of a vehicle. Specifically, the resin molded product 20 is used as an inner panel of an automobile, particularly as an inner panel of a back door.

本実施形態の樹脂成形品２０は、樹脂の一体成形品であり、図１及び図２に示されるように、本体部２２と、ボス部２４と、突部の一例としてのリブ部２６と、を有している。 The resin molded product 20 of the present embodiment is an integrally molded resin product, and as shown in FIGS. 1 and 2, the main body portion 22, the boss portion 24, and the rib portion 26 as an example of the protruding portion are included. have.

（本体部）
本体部２２は、図２に示されるように、板状とされており、厚み方向の一方側の面が意匠面２２Ａとされている。また、本体部２２の厚み方向の他方側の面は、意匠面２２Ａと反対側の反対面２２Ｂとされている。なお、樹脂成形品２０をバックドアのインナーパネルとして用いた場合に、本体部２２の意匠面２２Ａは、車室内側に位置する面であり、反対面２２Ｂは、車室外側に位置する面である。 (Main body)
As shown in FIG. 2, the main body portion 22 has a plate shape, and one surface in the thickness direction is a design surface 22A. The other surface of the main body 22 in the thickness direction is the opposite surface 22B opposite to the design surface 22A. When the resin molded product 20 is used as the inner panel of the back door, the design surface 22A of the main body 22 is a surface located on the vehicle interior side, and the opposite surface 22B is a surface located on the vehicle interior outside. be.

（ボス部）
ボス部２４は、図１及び図２に示されるように、本体部２２の反対面から突出する柱状部分である。なお、本実施形態のボス部２４は、略円柱状とされている。また、ボス部２４の頂面２４Ａには、頂面２４Ａから根元２４Ｂ側に向けて中空部２５が形成されている。この中空部２５は、ボス部２４を頂面２４Ａ側から見て、略円形状とされている。なお、図２ではボス部２４の突出方向を矢印Ｐで示し、図１ではボス部２４の周方向を矢印Ｃで示している。 (Boss part)
As shown in FIGS. 1 and 2, the boss portion 24 is a columnar portion protruding from the opposite surface of the main body portion 22. The boss portion 24 of the present embodiment has a substantially columnar shape. Further, on the top surface 24A of the boss portion 24, a hollow portion 25 is formed from the top surface 24A toward the root 24B side. The hollow portion 25 has a substantially circular shape when the boss portion 24 is viewed from the top surface 24A side. In FIG. 2, the protruding direction of the boss portion 24 is indicated by an arrow P, and in FIG. 1, the circumferential direction of the boss portion 24 is indicated by an arrow C.

（リブ部）
リブ部２６は、図１及び図２に示されるように、ボス部２４の外周に周方向に間隔をあけて複数形成されている。具体的には、これらのリブ部２６は、ボス部２４の外周に周方向に等間隔で形成されている。なお、本実施形態では、ボス部２４にリブ部２６が８本形成されている。また、本実施形態では、リブ部２６が一定厚みの板状とされている。 (Rib part)
As shown in FIGS. 1 and 2, a plurality of rib portions 26 are formed on the outer periphery of the boss portion 24 at intervals in the circumferential direction. Specifically, these rib portions 26 are formed on the outer periphery of the boss portion 24 at equal intervals in the circumferential direction. In this embodiment, eight rib portions 26 are formed on the boss portion 24. Further, in the present embodiment, the rib portion 26 has a plate shape having a constant thickness.

これらのリブ部２６は、ボス部２４の外周面からボス部２４の径方向へ突出すると共に反対面２２Ｂからボス部２４の突出方向に沿って延びている。なお、本実施形態では、図２に示されるように、リブ部２６は、反対面２２Ｂからボス部２４の頂面２４Ａまで延びている。 These rib portions 26 project from the outer peripheral surface of the boss portion 24 in the radial direction of the boss portion 24 and extend from the opposite surface 22B along the projecting direction of the boss portion 24. In the present embodiment, as shown in FIG. 2, the rib portion 26 extends from the opposite surface 22B to the top surface 24A of the boss portion 24.

また、リブ部２６におけるボス部２４と反対側の側面２６Ａの少なくとも一部（本実施形態では側面２６Ａ全体）が、ボス部２４の根元２４Ｂ側から頂面２４Ａ側に向けてボス部２４の外周面２４Ｃからの距離Ｌが次第に短くなるように傾斜している。 Further, at least a part of the side surface 26A of the rib portion 26 opposite to the boss portion 24 (in the present embodiment, the entire side surface 26A) is the outer periphery of the boss portion 24 from the root 24B side of the boss portion 24 toward the top surface 24A side. It is inclined so that the distance L from the surface 24C gradually becomes shorter.

また、図１及び図２に示されるように、ボス部２４の厚みＴ１は、リブ部２６の厚みＴ２よりも厚い。そして、ボス部２４の厚みＴ１は、中空部２５の頂面２４Ａにおける開口の幅Ｗ以下である。 Further, as shown in FIGS. 1 and 2, the thickness T1 of the boss portion 24 is thicker than the thickness T2 of the rib portion 26. The thickness T1 of the boss portion 24 is equal to or less than the width W of the opening on the top surface 24A of the hollow portion 25.

図３に示されるように、本実施形態のボス部２４は、車両用部品、例えば、バックドア用の内蔵部品（一例として、補強部材）３２を樹脂成形品２０に締結固定するための部分である。このボス部２４の中空部２５に、ねじ部材２８のねじ部２８Ａが捩じ込まれることで、ねじ部２８Ａの雄ねじの形状に対応する雌ねじが中空部２５の内周面に形成されて、ねじ部材２８を介して内蔵部品３２がボス部２４に締結固定される。ここで、ボス部２４の厚みＴ１は、ねじ部材２８の呼び径Ｄ以下である。なお、ここでいう、ねじ部材２８の呼び径Ｄとは、ねじ部２８Ａにおけるねじ山の外径（直径）を指す。また、本実施形態では、ねじ部材２８としてタッピングねじを用いている。 As shown in FIG. 3, the boss portion 24 of the present embodiment is a portion for fastening and fixing a vehicle component, for example, a built-in component for a back door (for example, a reinforcing member) 32 to the resin molded product 20. be. By screwing the screw portion 28A of the screw member 28 into the hollow portion 25 of the boss portion 24, a female screw corresponding to the shape of the male screw of the screw portion 28A is formed on the inner peripheral surface of the hollow portion 25, and the screw is screwed. The built-in component 32 is fastened and fixed to the boss portion 24 via the member 28. Here, the thickness T1 of the boss portion 24 is equal to or less than the nominal diameter D of the screw member 28. The nominal diameter D of the screw member 28 referred to here refers to the outer diameter (diameter) of the screw thread in the screw portion 28A. Further, in the present embodiment, a tapping screw is used as the screw member 28.

なお、本実施形態における内蔵部品３２は、バックドアを構成するインナーパネルとしての樹脂成形品２０とアウターパネル３０との間に配置されるようになっている。 The built-in component 32 in the present embodiment is arranged between the resin molded product 20 as the inner panel constituting the back door and the outer panel 30.

また、ボス部２４に形成された全てのリブ部２６は、同一寸法形状とされている。 Further, all the rib portions 26 formed on the boss portion 24 have the same dimensional shape.

次に本実施形態の作用並びに効果について説明する。
本実施形態の樹脂成形品２０では、ボス部２４の外周に、周方向に間隔をあけて本体部２２の反対面２２Ｂからボス部２４の突出方向に沿って延びる複数のリブ部２６を形成していることから、ボス部２４の強度が向上する。このように、ボス部２４に複数のリブ部２６を形成することで、ボス部２４の厚みＴ１を薄くして、ボス部２４の根元２４Ｂにおける本体部２２の反対面２２Ｂとの接触面積（境界の面積）及びボス部２４の体積を減少させても、ボス部２４の強度を確保することができる。ボス部２４の強度が確保されることで、ボス部２４の破損を抑制することができる。
また、ボス部２４の厚みＴ１を薄くすることで、ボス部２４の根元２４Ｂにおける本体部２２の反対面２２Ｂとの接触面積（境界の面積）及びボス部２４の体積が減少するため、樹脂材料の収縮が減少する。これにより、意匠面２２Ａにおけるボス部２４に対応する部分に、樹脂材料の収縮によるヒケが発生するのが抑制される。 Next, the operation and effect of this embodiment will be described.
In the resin molded product 20 of the present embodiment, a plurality of rib portions 26 extending from the opposite surface 22B of the main body portion 22 along the protruding direction of the boss portion 24 are formed on the outer periphery of the boss portion 24 at intervals in the circumferential direction. Therefore, the strength of the boss portion 24 is improved. By forming a plurality of rib portions 26 on the boss portion 24 in this way, the thickness T1 of the boss portion 24 is reduced, and the contact area (boundary) of the base portion 24B of the boss portion 24 with the opposite surface 22B of the main body portion 22. The strength of the boss portion 24 can be ensured even if the volume of the boss portion 24 is reduced. By ensuring the strength of the boss portion 24, damage to the boss portion 24 can be suppressed.
Further, by reducing the thickness T1 of the boss portion 24, the contact area (boundary area) of the base portion 24B of the boss portion 24 with the opposite surface 22B of the main body portion 22 and the volume of the boss portion 24 are reduced. Shrinkage is reduced. As a result, sink marks due to shrinkage of the resin material are suppressed from occurring in the portion of the design surface 22A corresponding to the boss portion 24.

また、樹脂成形品２０では、ボス部２４の外周に周方向に等間隔でリブ部２６を形成した場合、ボス部２４の径方向に対するボス部２４の強度を均一に確保することができる。 Further, in the resin molded product 20, when the rib portions 26 are formed on the outer periphery of the boss portion 24 at equal intervals in the circumferential direction, the strength of the boss portion 24 with respect to the radial direction of the boss portion 24 can be uniformly ensured.

そして、樹脂成形品２０では、複数のリブ部２６を同一寸法形状とした場合、ボス部２４の径方向に対するボス部２４の強度をさらに均一に確保することができる。 Then, in the resin molded product 20, when the plurality of rib portions 26 have the same size and shape, the strength of the boss portion 24 with respect to the radial direction of the boss portion 24 can be more uniformly secured.

また、樹脂成形品２０では、ボス部２４の厚みＴ１をリブ部２６の厚みＴ２よりも厚くした場合、ボス部２４の中空部２５にねじ部材２８を捩じ込んだときのボス部２４の破損を抑制することができる。 Further, in the resin molded product 20, when the thickness T1 of the boss portion 24 is made thicker than the thickness T2 of the rib portion 26, the boss portion 24 is damaged when the screw member 28 is screwed into the hollow portion 25 of the boss portion 24. Can be suppressed.

また、樹脂成形品２０では、リブ部２６を本体部２２の反対面２２Ｂから頂面２４Ａまで延ばした場合、ボス部２４の強度が、根元２４Ｂから頂面２４Ａに亘って安定して確保される。 Further, in the resin molded product 20, when the rib portion 26 is extended from the opposite surface 22B of the main body portion 22 to the top surface 24A, the strength of the boss portion 24 is stably secured from the root 24B to the top surface 24A. ..

また、樹脂成形品２０では、ボス部２４の厚みＴ１を中空部２５の頂面２４Ａにおける開口の幅Ｗ以下とした場合、ボス部２４と本体部２２との接触面積及びボス部２４の体積を十分に減少させられるため、意匠面２２Ａにおけるボス部２４に対応する部分にヒケが発生するのがさらに抑制される。 Further, in the resin molded product 20, when the thickness T1 of the boss portion 24 is set to be equal to or less than the width W of the opening on the top surface 24A of the hollow portion 25, the contact area between the boss portion 24 and the main body portion 22 and the volume of the boss portion 24 are increased. Since it is sufficiently reduced, sink marks are further suppressed in the portion of the design surface 22A corresponding to the boss portion 24.

また、樹脂成形品２０では、ボス部２４の厚みＴ１をねじ部材２８の呼び径Ｄ以下にした場合、ボス部２４と本体部２２との接触面積及びボス部２４の体積を十分に減少させられるため、意匠面２２Ａにおけるボス部２４に対応する部分にヒケが発生するのがさらに抑制される。 Further, in the resin molded product 20, when the thickness T1 of the boss portion 24 is set to be equal to or less than the nominal diameter D of the screw member 28, the contact area between the boss portion 24 and the main body portion 22 and the volume of the boss portion 24 can be sufficiently reduced. Therefore, the occurrence of sink marks on the portion of the design surface 22A corresponding to the boss portion 24 is further suppressed.

さらに、樹脂成形品２０では、リブ部２６におけるボス部２４と反対側の側面２６Ａの少なくとも一部をボス部２４の根元２４Ｂ側から頂面２４Ａ側に向けてボス部２４の外周面からの距離Ｌが次第に短くなるように傾斜させた場合、リブ部２６の側面２６Ａの傾斜部分による成形型の脱型が容易になる。 Further, in the resin molded product 20, at least a part of the side surface 26A of the rib portion 26 opposite to the boss portion 24 is directed from the root 24B side to the top surface 24A side of the boss portion 24 and is a distance from the outer peripheral surface of the boss portion 24. When L is inclined so as to be gradually shortened, the mold can be easily removed by the inclined portion of the side surface 26A of the rib portion 26.

そして、ボス部２４の強度が確保されると共に意匠面２２Ａにおけるボス部２４に対応する部分にヒケが発生するのが抑制された樹脂成形品２０を自動車用の内装部品であるインナーパネルとして用いることで、自動車の重量を軽減することができ、燃費を改善することが可能となる。 Then, the resin molded product 20 in which the strength of the boss portion 24 is ensured and sink marks are suppressed in the portion of the design surface 22A corresponding to the boss portion 24 is used as an inner panel which is an interior part for an automobile. Therefore, the weight of the automobile can be reduced and the fuel efficiency can be improved.

［その他の実施形態］
前述の実施形態では、リブ部２６が本体部２２の反対面２２Ｂからボス部２４の頂面２４Ａまで延びているが、本開示はこの構成に限定されない。例えば、図４及び図５に示されるボス部４０のように、リブ部４２が本体部２２の反対面２２Ｂからボス部４０の頂面４０Ａ近傍まで延びていればよい。なお、ボス部４０では、突出方向の長さが、リブ部４２の長さよりも若干長くなっている。 [Other Embodiments]
In the above-described embodiment, the rib portion 26 extends from the opposite surface 22B of the main body portion 22 to the top surface 24A of the boss portion 24, but the present disclosure is not limited to this configuration. For example, as in the boss portion 40 shown in FIGS. 4 and 5, the rib portion 42 may extend from the opposite surface 22B of the main body portion 22 to the vicinity of the top surface 40A of the boss portion 40. In the boss portion 40, the length in the protruding direction is slightly longer than the length of the rib portion 42.

前述の実施形態では、ボス部２４に形成された全てのリブ部２６を同一寸法形状としているが、本開示はこの構成に限定されない。図６のボス部５０のように、ボス部５０の外周面からの距離をリブ部５２Ａよりもリブ部５２Ｂで長くしてもよい。例えば、内蔵部品３２をボス部５０に締結固定した場合に、内蔵部品３２からの負荷（荷重）が作用する方向に対応するリブ部５２の長さを延ばすことで、荷重が作用する方向のボス部２４の強度を効果的に確保できるようになる。 In the above-described embodiment, all the rib portions 26 formed on the boss portion 24 have the same dimensional shape, but the present disclosure is not limited to this configuration. As in the boss portion 50 of FIG. 6, the distance of the boss portion 50 from the outer peripheral surface may be longer in the rib portion 52B than in the rib portion 52A. For example, when the built-in component 32 is fastened and fixed to the boss portion 50, the length of the rib portion 52 corresponding to the direction in which the load (load) from the built-in component 32 acts is extended, so that the boss in the direction in which the load acts. The strength of the portion 24 can be effectively secured.

前述の実施形態では、リブ部２６におけるボス部２４と反対側の側面２６Ａの全体が、ボス部２４の根元２４Ｂ側から頂面２４Ａ側に向けて距離Ｌが次第に短くなるように傾斜しているが本開示はこの構成に限定されない。例えば、図７に示されるボス部６０のように、ボス部６０に形成されたリブ部６２の側面６２Ａのうち、少なくとも一部（図７では、ボス部２４の突出方向の中間部分）６２Ｂが傾斜していれば、脱型が容易になる効果が得られる。 In the above-described embodiment, the entire side surface 26A of the rib portion 26 opposite to the boss portion 24 is inclined so that the distance L gradually becomes shorter from the root 24B side of the boss portion 24 toward the top surface 24A side. However, the present disclosure is not limited to this configuration. For example, as in the boss portion 60 shown in FIG. 7, at least a part (in FIG. 7, the intermediate portion in the protruding direction of the boss portion 24) 62B of the side surface 62A of the rib portion 62 formed in the boss portion 60 is If it is tilted, the effect of facilitating demolding can be obtained.

前述の実施形態では、ボス部２４を、略円柱状に形成しているが、本開示はこの構成に限定されない。例えば、図８に示されるボス部７０のように、略多角柱状に形成してもよい。なお、図８のボス部７０は、平面視で略正六角形状に形成されている。また、ボス部を略楕円形状に形成してもよい。また、図９に示されるボス部７２のように、平面視で、略星形の柱状に形成してもよい。ボス部７２では、リブ部７４がボス部７２の外周から径方向外側に向けて厚みが薄くなっている。 In the above-described embodiment, the boss portion 24 is formed in a substantially columnar shape, but the present disclosure is not limited to this configuration. For example, as shown in FIG. 8, the boss portion 70 may be formed in a substantially polygonal columnar shape. The boss portion 70 in FIG. 8 is formed in a substantially regular hexagonal shape in a plan view. Further, the boss portion may be formed in a substantially elliptical shape. Further, as in the boss portion 72 shown in FIG. 9, the boss portion 72 may be formed in a substantially star-shaped columnar shape in a plan view. In the boss portion 72, the rib portion 74 becomes thinner from the outer circumference of the boss portion 72 toward the outer side in the radial direction.

前述の実施形態では、ボス部２４の突出方向が本体部２２の反対面２２Ｂに対して直交する方向であったが、本開示はこの構成に限定されない。例えば、図１０に示されるボス部８０のように、本体部２２の反対面２２Ｂが傾斜しており、この反対面２２Ｂからボス部８０が反対面２２Ｂと直交する方向ではなく、斜め方向に延びていてもよい。 In the above-described embodiment, the protruding direction of the boss portion 24 is a direction orthogonal to the opposite surface 22B of the main body portion 22, but the present disclosure is not limited to this configuration. For example, as in the boss portion 80 shown in FIG. 10, the opposite surface 22B of the main body portion 22 is inclined, and the boss portion 80 extends diagonally from the opposite surface 22B, not in a direction orthogonal to the opposite surface 22B. You may be.

前述の実施形態では、ボス部２４に対して８本のリブ部２６を形成しているが、本開示はこの構成に限定されない。ボス部２４に対するリブ部２６の数は、２本以上であればよいが、ボス部２４に作用する荷重に耐える観点で４本以上、好ましくは８本とすることが好ましい。 In the above-described embodiment, eight rib portions 26 are formed with respect to the boss portion 24, but the present disclosure is not limited to this configuration. The number of rib portions 26 with respect to the boss portion 24 may be two or more, but is preferably four or more, preferably eight, from the viewpoint of withstanding the load acting on the boss portion 24.

前述の実施形態では、ボス部２４の中空部２５に、タッピングねじとしてのねじ部材２８を捩じ込むことで、ねじ部材２８を介してボス部２４に内蔵部品３２を締結固定する構成としているが本開示はこの構成に限定されない。ボス部２４の中空部２５の内周面に、内面に雌ねじが形成された筒体を埋め込んでおいて、この筒体の雌ねじにねじ部材２８のねじ部２８Ａを捩じ込むことで、ねじ部材２８を介してボス部２４に内蔵部品３２を締結固定する構成としてもよい。 In the above-described embodiment, the internal component 32 is fastened and fixed to the boss portion 24 via the screw member 28 by screwing the screw member 28 as a tapping screw into the hollow portion 25 of the boss portion 24. The present disclosure is not limited to this configuration. A cylinder having a female screw formed on the inner surface is embedded in the inner peripheral surface of the hollow portion 25 of the boss portion 24, and the screw portion 28A of the screw member 28 is screwed into the female screw of the cylinder to screw the screw member. The built-in component 32 may be fastened and fixed to the boss portion 24 via the 28.

以上、本開示の好適な実施形態について説明したが、本開示は必ずしも上述した実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更を行ってもよい。 Although the preferred embodiments of the present disclosure have been described above, the present disclosure is not necessarily limited to the above-described embodiments, and modifications may be made as appropriate without departing from the spirit of the present disclosure.

２０ 樹脂成形品
２２ 本体部
２２Ａ 意匠面
２２Ｂ 反対面
２４ ボス部
２４Ａ 頂面
２４Ｂ 根元
２４Ｃ 外周面
２５ 中空部
２６ リブ部
２６Ａ 側面
２８ ねじ部材
４０ ボス部
４２ リブ部
５０ ボス部
５２ リブ部
６２ リブ部
７０ ボス部
７２ リブ部
７４ リブ部
Ｃ ボス部の周方向
Ｐ ボス部の突出方向
Ｄ ねじ部材の呼び径
Ｌ 突部側面のボス部外周面からの距離
Ｗ 中空部の開口幅
Ｔ１ ボス部の厚み
Ｔ２ 突部の厚み
20 Resin molded product 22 Main body 22A Design surface 22B Opposite surface 24 Boss part 24A Top surface 24B Root 24C Outer surface 25 Hollow part 26 Rib part 26A Side surface 28 Screw member 40 Boss part 42 Rib part 50 Boss part 52 Rib part 62 70 Boss part 72 Rib part 74 Rib part C Circumferential direction of boss part P Protrusion direction of boss part D Nominal diameter of screw member L Distance from outer peripheral surface of boss part on side of protrusion W Opening width of hollow part T1 Thickness of boss part Thickness of T2 protrusion

Claims (9)

車両用の樹脂成形品であって、
意匠面と反対面とを有する本体部と、
前記本体部の前記反対面から突出すると共に頂面から根元側に向けて中空部が形成されたボス部と、
前記ボス部の外周に周方向に間隔をあけて形成され、前記反対面から前記ボス部の突出方向に沿って延びる複数の突部と、
を備える樹脂成形品。 It is a resin molded product for vehicles,
The main body, which has a design surface and an opposite surface,
A boss portion that protrudes from the opposite surface of the main body portion and has a hollow portion formed from the top surface toward the root side.
A plurality of protrusions formed on the outer periphery of the boss portion at intervals in the circumferential direction and extending from the opposite surface along the projecting direction of the boss portion.
Resin molded product. 前記突部は、前記ボス部の外周に周方向に等間隔で形成されている、請求項１に記載の樹脂成形品。 The resin molded product according to claim 1, wherein the protrusions are formed on the outer periphery of the boss portion at equal intervals in the circumferential direction. 前記ボス部の厚みは、前記突部の厚みよりも厚い、請求項１又請求項２に記載の樹脂成形品。 The resin molded product according to claim 1 or 2, wherein the thickness of the boss portion is thicker than the thickness of the protrusion portion. 前記突部は、前記反対面から前記ボス部の頂面まで延びている、請求項１〜請求項３のいずれか１項に記載の樹脂成形品。 The resin molded product according to any one of claims 1 to 3, wherein the protrusion extends from the opposite surface to the top surface of the boss portion. 前記ボス部の厚みが、前記中空部の前記頂面における開口の幅以下である、請求項１〜請求項４のいずれか１項に記載の樹脂成形品。 The resin molded product according to any one of claims 1 to 4, wherein the thickness of the boss portion is equal to or less than the width of the opening in the top surface of the hollow portion. 前記中空部には、ねじ部材が捩じ込まれるようになっており、
前記ボス部の厚みが、前記ねじ部材の呼び径以下である、請求項１〜請求項４のいずれか１項に記載の樹脂成形品。 A screw member is screwed into the hollow portion.
The resin molded product according to any one of claims 1 to 4, wherein the thickness of the boss portion is equal to or less than the nominal diameter of the screw member. 前記突部における前記ボス部と反対側の側面の少なくとも一部は、前記ボス部の根元側から頂面側に向けて前記ボス部の外周面からの距離が次第に短くなるように傾斜している、請求項１〜請求項６のいずれか１項に記載の樹脂成形品。 At least a part of the side surface of the protrusion opposite to the boss portion is inclined so that the distance from the outer peripheral surface of the boss portion gradually decreases from the root side to the top surface side of the boss portion. , The resin molded product according to any one of claims 1 to 6. 複数の前記突部は、同一寸法形状である、請求項１〜請求項７のいずれか１項に記載の樹脂成形品。 The resin molded product according to any one of claims 1 to 7, wherein the plurality of protrusions have the same dimensions and shape. 前記樹脂成形品が、インナーパネルである、請求項１〜請求項８のいずれか１項に記載の樹脂成形品。
The resin molded product according to any one of claims 1 to 8, wherein the resin molded product is an inner panel.
JP2020039231A 2020-03-06 2020-03-06 Resin molding Pending JP2021138096A (en)

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US3975611A (en) * 1969-12-01 1976-08-17 Trw Inc. Trim fastening
DE3517620C2 (en) * 1984-05-19 1996-07-18 Emhart Ind Plastic clip
RU2118264C1 (en) * 1996-04-29 1998-08-27 Акционерное общество "АвтоВАЗ" Vehicle moulding attachment unit
JP2013061036A (en) * 2011-09-14 2013-04-04 Nifco Inc Fastener
ES2651263T3 (en) * 2012-03-07 2018-01-25 Toyoda Iron Works Co., Ltd. Composite Overlay Component
RU132764U1 (en) * 2012-12-18 2013-09-27 Открытое акционерное общество "АВТОВАЗ" (ОАО "АВТОВАЗ") VEHICLE MOLDING ASSEMBLY ASSEMBLY

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