JP2010216924A - Decorative member, radar unit and method for producing decorative member - Google Patents

Decorative member, radar unit and method for producing decorative member Download PDF

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JP2010216924A
JP2010216924A JP2009062636A JP2009062636A JP2010216924A JP 2010216924 A JP2010216924 A JP 2010216924A JP 2009062636 A JP2009062636 A JP 2009062636A JP 2009062636 A JP2009062636 A JP 2009062636A JP 2010216924 A JP2010216924 A JP 2010216924A
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decorative member
base material
synthetic resin
adhesive layer
film
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JP5275856B2 (en
Inventor
Masao Ayabe
正雄 綾部
Yasuhide Narita
康秀 成田
Takashige Ichikawa
貴茂 市川
Takahiro Sugiyama
孝浩 杉山
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Tokai Rika Co Ltd
Toyota Motor Corp
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Tokai Rika Co Ltd
Toyota Motor Corp
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/27Adaptation for use in or on movable bodies
    • H01Q1/32Adaptation for use in or on road or rail vehicles
    • H01Q1/3208Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88Radar or analogous systems specially adapted for specific applications
    • G01S13/93Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/42Housings not intimately mechanically associated with radiating elements, e.g. radome
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/44Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88Radar or analogous systems specially adapted for specific applications
    • G01S13/93Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9327Sensor installation details
    • G01S2013/93271Sensor installation details in the front of the vehicles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/027Constructional details of housings, e.g. form, type, material or ruggedness

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Security & Cryptography (AREA)
  • Details Of Aerials (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To constitute a molded product that has metallic appearance, does not suppress the passage of an electromagnetic wave of a specific frequency, and has excellent design by coating the surface with a synthetic resin. <P>SOLUTION: A base material 16 is three-dimensionally processed and sandwiched between a front face material 12 and a back face material 14. A projecting part of the base material 16 is metallic and a recessed part is provided with a black printed layer 24. The front face material 12 side of a decorative member 10 plays a decorative role, and on the back face thereof, an electromagnetic wave transceiver is suitably disposed. An electromagnetic wave transmitted from or received by the electromagnetic wave transceiver is a millimeter wave (about 4 mm), and an attenuation rate when the millimeter wave passes varies with the thickness of the base material 16 (total reflection sheet 22) applied to the decorative member 10. The attenuation rate varies based on the material. When the upper limit value of the attenuation rate (dB) of the millimeter wave is set to 2 dB and the thickness of the decorative member 10 is about 5 to 8 mm, the base material is preferably formed of polycarbonate, and has a thickness of 7.2±0.2 mm or 6.0±0.2 mm. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、全反射シートが用いられた装飾部材、この装飾部材と距離検出用レーダで構成されたレーダユニット、並びに装飾部材製造方法に関する。   The present invention relates to a decorative member using a total reflection sheet, a radar unit including the decorative member and a distance detecting radar, and a decorative member manufacturing method.

従来、車両の装飾部材には、金属調の外観が適用されることが多い。例えば、車両のフロントグリルを構成するルーバーや、フロントグリルの中央に取り付けられる車両や車名を特定するエンブレム等の成形品に金属調が求められる。   Conventionally, a metallic appearance is often applied to a decorative member of a vehicle. For example, a metallic tone is required for a molded product such as a louver constituting a front grille of a vehicle, a vehicle attached to the center of the front grille, or an emblem for identifying a vehicle name.

このような、成形品に金属調を付与する手段は、金属粒子を含む塗料を塗布したり、メッキや蒸着によって金属膜を形成することが一般的である。   As a means for imparting a metallic tone to such a molded article, it is common to apply a paint containing metal particles or to form a metal film by plating or vapor deposition.

ここで、近年、車両には、前方の障害物を迅速に認識するために、レーダユニットを搭載する場合がある。レーダユニットは、電波の発信部と、受信部とを備え、発信部から発した電波が障害物に跳ね返り、受信部で受信するまでの時間を計測することで、障害物の有無を判定する。   Here, in recent years, a radar unit may be mounted on a vehicle in order to quickly recognize an obstacle ahead. The radar unit includes a radio wave transmitter and a receiver, and determines the presence or absence of an obstacle by measuring the time until the radio wave emitted from the transmitter bounces off the obstacle and is received by the receiver.

このような、レーダユニットは、電波の発信エリアに連続した金属皮膜(金属層)があると、電磁波シールド性が発生し、電波障害を発生させる。電波障害とは、発信部で発信した電波が車両前方へ届かない、障害物から反射した電波を受信部で受信できない等、レーダユニットとしての機能を損なうものである。レーダユニットは、外部から隠蔽するため、装飾部材の裏面側に配置するのが好ましい。   In such a radar unit, when there is a continuous metal film (metal layer) in a radio wave transmission area, an electromagnetic wave shielding property is generated and a radio wave interference is generated. The radio wave interference is a function that impairs the function of the radar unit, such as the radio wave transmitted from the transmission unit does not reach the front of the vehicle or the radio wave reflected from the obstacle cannot be received by the reception unit. Since the radar unit is concealed from the outside, the radar unit is preferably arranged on the back side of the decorative member.

反面、前述したように、車両の装飾部材には、金属調の処理が求められており、レーダユニットと装飾部材の相対位置によっては、二律背反の関係にある。   On the other hand, as described above, the decorative member of the vehicle is required to be processed in a metallic manner, and has a trade-off relationship depending on the relative position of the radar unit and the decorative member.

ここで、特許文献1では、電磁波を透過し、高輝度で自然な金属調を維持するフィルムが提案されている。   Here, in patent document 1, the film which permeate | transmits electromagnetic waves and maintains a natural metallic tone with high brightness is proposed.

より具体的には、特許文献1のフィルムは、少なくとも2種類以上の可塑性樹脂層が厚み方向に交互に30層以上積層された積層フィルムであって、波長400nm〜1000nmにおける反射率が30%以上、150℃における引張試験においてフィルム長手方向および幅方向の100%伸度時の引張応力が3MPa以上90MPa以下、層対厚み10nm以上220nm未満の層の数が層対厚み220nm以上320nm以下の層の数より多く、積層フィルム中にマロン酸エステル系化合物又は蓚酸アニリド系化合物から選ばれた紫外線吸収剤を少なくとも1種類以上含有する。   More specifically, the film of Patent Document 1 is a laminated film in which at least two or more types of plastic resin layers are alternately laminated in the thickness direction, and the reflectance at a wavelength of 400 nm to 1000 nm is 30% or more. In a tensile test at 150 ° C., the number of layers having a tensile strength of 3 MPa to 90 MPa and a layer thickness of 10 nm to less than 220 nm in a film longitudinal direction and a width direction of 100% elongation is 220 nm to 320 nm. More than the number, the laminated film contains at least one ultraviolet absorber selected from a malonic acid ester compound or an oxalic acid anilide compound.

なお、参考として、特許文献2には、レーダ全透過性であり、回折、屈折、散乱および反射によってレーダ伝搬に悪影響を与えない構成の自動車用のエンブレム(装飾部材)が開示されている。   As a reference, Patent Document 2 discloses an automobile emblem (decorative member) that is configured to have radar total transparency and that does not adversely affect radar propagation due to diffraction, refraction, scattering, and reflection.

このエンブレムは、金属光沢のある層を備えているが、この層は、可視波長範囲内では電磁放射線又は光を完全に反射し、それよりも長い波長のレーダ波をほとんど弱めることなく透過するように薄いと記載されている。また、特許文献2には、金属光沢のある非金属的な特別な塗料によるコーティングも可能であるとも記載されている。   The emblem has a metallic glossy layer that completely reflects electromagnetic radiation or light within the visible wavelength range and transmits the longer wavelength radar waves with little attenuation. Is described as thin. Patent Document 2 also describes that coating with a metallic non-metallic special paint is possible.

特開2008−200861公報JP 2008-200701 A 特開2000−49522公報JP 2000-49522 A

しかしながら、特許文献1のフィルムは、金属調の外観を持ち、かつ電磁波を透過するが、例えば、車両のエンブレム等の装飾部材として、一部に印刷を施したり、周囲をインジェクション成形等によって合成樹脂で覆った成形品を生成する場合に、注入される合成樹脂とフィルムとの間の密着性に欠け、意匠性が損なわれる。   However, the film of Patent Document 1 has a metallic appearance and transmits electromagnetic waves. For example, as a decorative member such as a vehicle emblem, a part of the film is printed, or the periphery is formed by injection molding or the like. When a molded product covered with is produced, the adhesion between the injected synthetic resin and the film is lacking, and the design is impaired.

また、特許文献2では、金属膜層を用いた場合にはその膜厚に制限があり、設計の自由度の制約を受ける。なお、金属光沢のある非金属的な特別な塗料については、具体的に示されておらず、示唆もされていない。   Further, in Patent Document 2, when a metal film layer is used, the film thickness is limited, and the design freedom is restricted. It should be noted that the metallic glossy non-metallic special paint is not specifically shown or suggested.

本発明は上記事実を考慮し、金属調の外観を持ちつつ、例えばミリ波等、特定の周波数の電磁波の通過を抑制することがなく、かつ意匠性に優れた成形品を構成することができる装飾部材、レーダユニット、装飾部材製造方法を得ることが目的である。   In consideration of the above facts, the present invention can form a molded article that has a metallic appearance, does not suppress the passage of electromagnetic waves of a specific frequency such as millimeter waves, and is excellent in design. It is an object to obtain a decorative member, a radar unit, and a decorative member manufacturing method.

第1の発明は、それぞれ異なる周波数帯域の光を不透過とするポリエチレン系樹脂の膜層を積層することで、光を全反射する全反射シートの少なくとも一方の面に図柄を印刷した印刷層が設けられた基材を、所定の金型にセットして、当該基材の表裏面に合成樹脂を注入することで成形された装飾部材であって、前記基材の表裏面に接着層を設け、前記合成樹脂注入時に溶解し、前記基材と合成樹脂とを密着させることを特徴とする装飾部材である。   According to the first aspect of the present invention, there is provided a printed layer in which a pattern is printed on at least one surface of a total reflection sheet that totally reflects light by laminating a film layer of polyethylene resin that does not transmit light in different frequency bands. A decorative member formed by setting the provided base material in a predetermined mold and injecting synthetic resin into the front and back surfaces of the base material, and providing an adhesive layer on the front and back surfaces of the base material The decorative member is characterized in that it is dissolved at the time of injecting the synthetic resin so that the substrate and the synthetic resin are brought into close contact with each other.

第1の発明によれば、基材は光を全反射するための鏡面シートとなり金属調を得ることができる。しかし、所定の電磁波の通過を抑制しない。また、接着層を設けることで、基材と合成樹脂とが密着し、意匠性に優れた装飾部材とすることができる。   According to 1st invention, a base material becomes a mirror surface sheet for totally reflecting light, and can obtain a metallic tone. However, it does not suppress the passage of predetermined electromagnetic waves. Further, by providing the adhesive layer, the base material and the synthetic resin are in close contact with each other, and a decorative member having excellent design properties can be obtained.

第1の発明において、前記合成樹脂注入がインジェクション成形による注入であり、その注入方向が、接着層上の合成樹脂注入空間を介した金型天井面であることを特徴としている。   1st invention WHEREIN: The said synthetic resin injection | pouring is injection | pouring by injection molding, The injection | pouring direction is a metal mold | die ceiling surface through the synthetic resin injection | pouring space on an adhesive layer, It is characterized by the above-mentioned.

接着層に溶解した合成樹脂が直接吹き付けられると、直接吹き付けられた部位と、そうでない部位との、接着層の温度差が大きくなり、密着性を損なう可能性がある。そこで、注入する合成樹脂を直接接着層に吹き付けないように、金型天井面とする。   When the synthetic resin dissolved in the adhesive layer is directly sprayed, the temperature difference of the adhesive layer between the directly sprayed portion and the portion that is not sprayed becomes large, which may impair the adhesion. Therefore, the mold ceiling surface is used so that the synthetic resin to be injected is not directly sprayed onto the adhesive layer.

また、第1の発明において、前記膜層がポリエチレン系素材であり、前記印刷にアクリル系印刷インキが適用され、このアクリル系印刷インキが接着層を兼ねることを特徴としている。   In the first invention, the film layer is made of a polyethylene material, and an acrylic printing ink is applied to the printing. The acrylic printing ink also serves as an adhesive layer.

印刷がある場合、この印刷のための印刷インキをアクリル系とすることで、接着層が存在するのと同等の合成樹脂との密着性を持たせることができる。   When printing is performed, the printing ink for this printing is acrylic, so that the adhesiveness with the synthetic resin equivalent to the presence of the adhesive layer can be provided.

さらに、第1の発明において、前記膜層がポリエチレン系素材であり、ポリエチレン系樹脂の積層膜の表裏面に注入する材料と同系統の膜をラミネートすることで、このラミネート膜が前記接着層の代替として機能することを特徴としている。   Further, in the first invention, the film layer is a polyethylene-based material, and a film of the same system as the material to be injected on the front and back surfaces of the polyethylene-based resin laminated film is laminated, so that the laminate film is formed of the adhesive layer. It functions as an alternative.

第2の発明は、前記第1の発明の装飾部材と、所定方向に電磁波を出力し、当該出力された電磁波の反射波を受信することで、反射対象までの距離を計測する距離検出用レーダとを有し、前記装飾部材が、前記距離検出用レーダにおける少なくとも前記電磁波出力面側に配置され前記距離検出用レーダを隠蔽することを特徴とするレーダユニットである。   According to a second aspect of the invention, there is provided a distance detecting radar that measures the distance to a reflection target by outputting an electromagnetic wave in a predetermined direction and receiving a reflected wave of the output electromagnetic wave with the decorative member of the first aspect. And the decorative member is arranged at least on the electromagnetic wave output surface side of the distance detection radar and conceals the distance detection radar.

第2の発明によれば、距離検出レーダの機能を損なうことなく、かつ、外部から見えない位置に隠蔽することができる。   According to the second aspect of the present invention, it is possible to hide the position detection radar from a position that is not visible from the outside without impairing the function of the distance detection radar.

第3の発明は、それぞれ異なる周波数帯域の光を不透過とするポリエチレン系樹脂の膜層を積層することで、光を全反射する全反射シートを所定の形状に切り取り、かつ所定の印刷を施した基材の表裏面に接着層を設け、この接着層付の基材を表面成形用金型にセットし、表面側に合成樹脂を注入することで、前記接着層を溶解して、前記基材と、固化した前記合成樹脂とを密着してこれをアッセンブリとし、前記アッセンブリを裏面成形用金型にセットし、裏面側に合成樹脂を注入することで、この合成樹脂の硬化過程において、前記接着層を溶解し、前記基材と前記合成樹脂とを密着することで生成する装飾部材製造方法である。   According to a third aspect of the present invention, a polyethylene resin film layer that does not transmit light in different frequency bands is laminated, whereby a total reflection sheet that totally reflects light is cut into a predetermined shape and subjected to predetermined printing. An adhesive layer is provided on the front and back surfaces of the base material, the base material with the adhesive layer is set in a surface molding die, and a synthetic resin is injected on the surface side to dissolve the adhesive layer, The material and the solidified synthetic resin are in close contact to form an assembly, the assembly is set in a back surface molding die, and the synthetic resin is injected on the back surface side. It is a decorative member manufacturing method produced | generated by melt | dissolving an adhesive layer and adhere | attaching the said base material and the said synthetic resin.

第3の発明によれば、基材は光を全反射するための鏡面シートとなり金属調を得ることができる。すなわち、金属調であるが金属ではないので、所定の電磁波の通過を抑制しない。また、接着層を設けることで、基材と合成樹脂とが密着し、意匠性に優れた装飾部材とすることができる。   According to 3rd invention, a base material becomes a mirror surface sheet | seat for totally reflecting light, and can obtain a metallic tone. That is, although it is metallic, it is not metal, it does not suppress the passage of predetermined electromagnetic waves. Further, by providing the adhesive layer, the base material and the synthetic resin are in close contact with each other, and a decorative member having excellent design properties can be obtained.

以上説明した如く本発明によれば、金属調の外観を持ちつつ、例えばミリ波等、特定の周波数の電磁波の通過を抑制することがなく、かつ意匠性に優れた成形品を構成することができるという優れた効果を有する。   As described above, according to the present invention, it is possible to form a molded product having a metallic appearance, without suppressing passage of electromagnetic waves having a specific frequency such as millimeter waves, and having excellent design. It has an excellent effect of being able to.

本実施の形態に係る装飾部材の斜視図である。It is a perspective view of the decoration member concerning this embodiment. (A)は本実施の形態に係る基材の断面図、(B)基材に表材及び裏材が組み付けられた装飾部材の断面図である。(A) is sectional drawing of the base material which concerns on this Embodiment, (B) It is sectional drawing of the decoration member by which the surface material and the back material were assembled | attached to the base material. 反射シートに用いられる膜層の特性を示したものであり、(A)は可視波長の内、低域を反射する膜層の波長−反射率特性図、(B)は可視波長の内、中域を反射する膜層の波長−反射率特性図、(C)は可視波長の内、高域を反射する膜層の波長−反射率特性図である。The characteristics of the film layer used in the reflection sheet are shown. (A) is the wavelength-reflectance characteristic diagram of the film layer reflecting the low frequency in the visible wavelength, and (B) is the medium in the visible wavelength. FIG. 4C is a wavelength-reflectance characteristic diagram of a film layer reflecting a region, and FIG. 4C is a wavelength-reflectance characteristic diagram of a film layer reflecting a high region of visible wavelengths. 反射シートにおいて膜層数の違いによる、波長−反射率特性図である。It is a wavelength-reflectance characteristic figure by the difference in the number of film layers in a reflective sheet. 本実施の形態に係る装飾部材の製造方法の工程を示す流れ図である。It is a flowchart which shows the process of the manufacturing method of the decoration member which concerns on this Embodiment. 本実施の形態に係る装飾部材が車両に適用されたレーダユニットの実施例を示す斜視図である。It is a perspective view which shows the Example of the radar unit with which the decoration member which concerns on this Embodiment was applied to the vehicle. 図6に示すラジエータグリルの拡大正面図である。FIG. 7 is an enlarged front view of the radiator grill shown in FIG. 6. 図6に示すラジエータグリルの拡大側面断面図である。FIG. 7 is an enlarged side cross-sectional view of the radiator grill shown in FIG. 6.

図1には、本実施の形態に係る装飾部材10が示されている。   FIG. 1 shows a decorative member 10 according to the present embodiment.

装飾部材10は、大きく分けて、3層構造となっており、その表面側が透明の合成樹脂材(以下、「表面材12」という)で形成され、裏面側が非透明(例えば、黒色でAESやABS等)の合成樹脂材(以下、「裏面材14」という)で形成されている。   The decorative member 10 is roughly divided into a three-layer structure, the front surface side is formed of a transparent synthetic resin material (hereinafter referred to as “surface material 12”), and the back surface side is non-transparent (for example, black with AES or ABS) and the like (hereinafter, referred to as “back surface material 14”).

装飾部材10は、中央部が最も突出したドーム型形状となっており、前記表面材12と裏面材14との間には、装飾部材10として、第1の機能であるデザインが施された基材16が挟み込まれている。なお、装飾部材10の製造工程(以下、詳細説明)の途中では、基材16の表面及び裏面には、それぞれ接着層18、20(図5参照)が設けられているが、製品段階では、接着層18、20が溶解して透明となり、基材16と表面材12、並びに、基材16と裏面材14との間を密封状態としている。   The decorative member 10 has a dome shape in which the central portion protrudes most, and a base that is designed as a first function as the decorative member 10 is provided between the surface material 12 and the back surface material 14. A material 16 is sandwiched. In the middle of the manufacturing process of the decorative member 10 (hereinafter, detailed description), adhesive layers 18 and 20 (see FIG. 5) are provided on the front surface and the back surface of the base material 16, respectively. The adhesive layers 18 and 20 are dissolved and become transparent, and the base material 16 and the surface material 12 and the space between the base material 16 and the back material 14 are sealed.

基材16は、図2(A)に示される如く、素材として全反射シート22が適用され、その表面(表面材12と対向する面)には、印刷層24が施されている。   As shown in FIG. 2A, the base material 16 is applied with a total reflection sheet 22 as a material, and a printed layer 24 is provided on the surface (the surface facing the surface material 12).

全反射シート22は、それぞれ異なる周波数帯域の光を不透過とするポリエチレン系樹脂の膜層を積層することで生成されており、光を全反射する、すなわち、鏡面を形成する。鏡面は、研磨された金属面と同様であり、このため、全反射シートは、金属調を持っている。「金属調」ということは、言い換えれば、全く金属を用いずに、金属であるかのような仕上げとなっており、例えば、電磁波の通過を抑制するようなことがない。   The total reflection sheet 22 is generated by laminating a film layer of polyethylene resin that does not transmit light in different frequency bands, and totally reflects light, that is, forms a mirror surface. The mirror surface is similar to the polished metal surface, and thus the total reflection sheet has a metallic tone. In other words, “metal tone” means that the finish is as if it is a metal without using any metal. For example, it does not suppress the passage of electromagnetic waves.

図3は、全反射シート22の特性を示したものであり、例えば、図3(A)〜(C)に示す波長−反射率特性を持つ膜層を積層すると、図4の矢印Aで示されるように、約70〜80%の反射率を持ったシートが形成できる。   FIG. 3 shows the characteristics of the total reflection sheet 22. For example, when a film layer having the wavelength-reflectance characteristics shown in FIGS. As described above, a sheet having a reflectance of about 70 to 80% can be formed.

さらに、積層を重ねて17層とすると、図4の矢印Bで示されるように、約90%の反射率を持ったシートが形成できる。   Further, when the layers are stacked to form 17 layers, a sheet having a reflectivity of about 90% can be formed as shown by an arrow B in FIG.

本実施の形態では、鏡面仕上げであることが要求されるため、図4の矢印Cで示されるように、膜層を400層又は800層とし、反射率をほぼ100%とした。   In this embodiment, since it is required to have a mirror finish, as shown by an arrow C in FIG. 4, the film layer is set to 400 or 800 layers, and the reflectance is set to approximately 100%.

図2(A)に示される基材16は、図2(B)に示される如く、立体的に加工された状態で、前記表面材12と裏面材14とに挟みこまれており、基材16の凸部が金属調とされ、凹部に印刷層24の黒色領域が位置する。   A base material 16 shown in FIG. 2A is sandwiched between the surface material 12 and the back surface material 14 in a three-dimensionally processed state as shown in FIG. The 16 convex portions are metallic, and the black region of the print layer 24 is located in the concave portions.

前記装飾部材10は、表面材12側が意匠的な役目を有しており、全体として、裏面材14に対向する位置に、電磁波送受信機(例えば、図6に示すミリ波レーダ60)を配置するのに適している(第2の機能)。   The decorative member 10 has a design role on the surface material 12 side, and an electromagnetic wave transmitter / receiver (for example, the millimeter wave radar 60 shown in FIG. 6) is disposed at a position facing the back material 14 as a whole. (Second function).

本実施の形態で適用される電磁波送受信機から発信又は受信される電磁波の波長はミリ波(約4mm)であり、装飾部材10(特に表面材12)の厚さ寸法によって、このミリ波が通過するときの減衰率が異なる。また、材質(主として、表面材12と裏面材14)によって減衰率は異なる。   The wavelength of the electromagnetic wave transmitted or received from the electromagnetic wave transceiver applied in the present embodiment is a millimeter wave (about 4 mm), and this millimeter wave passes depending on the thickness dimension of the decorative member 10 (particularly the surface material 12). The attenuation rate is different. Further, the attenuation rate varies depending on the material (mainly, the front material 12 and the back material 14).

そこで、このミリ波の減衰率(dB)に上限値を設定し、それを満足するものを選択する。また、装飾部材10として、適当な板厚は、5〜8mm程度であるので、この板厚を満足し、かつ、例えば、減衰率の上限値を2dBに設定すると、以下のような結果となる。   Therefore, an upper limit value is set for the attenuation rate (dB) of the millimeter wave, and the one that satisfies the upper limit value is selected. In addition, since a suitable plate thickness as the decorative member 10 is about 5 to 8 mm, when this plate thickness is satisfied and, for example, the upper limit value of the attenuation rate is set to 2 dB, the following results are obtained. .

Figure 2010216924
Figure 2010216924

この候補1又は候補2は、素材が持つ誘電率に基づいており、ポリカーボネイト樹脂の場合、1.2mmの倍数のとき減衰率が低いことから選択されたものである。   Candidate 1 or 2 is selected based on the dielectric constant of the material. In the case of polycarbonate resin, the attenuation is low when it is a multiple of 1.2 mm.

(装飾部材10の製造方法)
まず、図5(A)に示される如く、基材16を生成するために、反射シート22を用意する。反射シート22は、前述の如く、それぞれ異なる周波数帯域の光を不透過とするポリエチレン系樹脂の膜層を積層(約400層又は800層)することで生成されたものであり、製品として市販されている。
(Manufacturing method of the decorative member 10)
First, as shown in FIG. 5A, a reflection sheet 22 is prepared in order to generate the substrate 16. As described above, the reflection sheet 22 is produced by laminating (about 400 or 800 layers) polyethylene resin film layers that do not transmit light in different frequency bands, and is commercially available as a product. ing.

次に、図5(B)に示される如く、この反射シート22を装飾部材10の基材16の外形にカットすると共に、印刷層24を施す。ここでは、反射シート22を楕円形にカットして、2つの島状の領域(対称形)に黒色となった印刷層24を施す。なお、黒色ではない印刷層24は透明であり、反射シート22の表面がむき出しであるため、鏡面となる。   Next, as shown in FIG. 5B, the reflective sheet 22 is cut into the outer shape of the base material 16 of the decorative member 10 and a printed layer 24 is applied. Here, the reflective sheet 22 is cut into an oval shape, and a black printed layer 24 is applied to two island-like regions (symmetrical shapes). In addition, since the printing layer 24 which is not black is transparent and the surface of the reflective sheet 22 is exposed, it becomes a mirror surface.

なお、印刷層24の印刷パターンは、適用さえる意匠に基づくものであり、上記のような島状の2つの領域(対称形)に限定されるものではない。例えば、楕円の周縁と、意匠対象を強調する頭文字(アルファベット等)を象った部分を鏡面とし、それ以外を背景色(黒色等)としてもよい。   In addition, the printing pattern of the printing layer 24 is based on the design which can be applied, and is not limited to two island-like regions (symmetrical shapes) as described above. For example, an elliptical periphery and a part that represents an initial letter (such as an alphabet) that emphasizes a design object may be a mirror surface, and the other may be a background color (such as black).

図5(C)では、基材16(全反射シート22と印刷層24)の表面及び裏面のそれぞれに、少なくとも硬化時に無色透明となる接着層18、20を設ける。接着層18、20は、予め膜層状のものを貼り付けてもよいし、塗布して乾燥させるようにしてもよい。   In FIG.5 (C), the adhesive layers 18 and 20 which become colorless and transparent at least at the time of hardening are provided in each of the surface and the back surface of the base material 16 (total reflection sheet 22 and printing layer 24). The adhesive layers 18 and 20 may be attached in advance as film layers, or may be applied and dried.

また、接着層18、20の代替となる様、ポリエチレン系樹脂の積層膜の表裏面に注入する材料と同系統の膜をラミネートしてもよい。   In addition, a film of the same system as the material to be injected may be laminated on the front and back surfaces of the laminated film of polyethylene resin so as to replace the adhesive layers 18 and 20.

このようにして形成した基材16は、図5(D)に示される如く、表材成形用の金型26にセットする。   The base material 16 formed in this way is set in a surface molding die 26 as shown in FIG.

このとき、下型26Lには、凹凸が形成され、基材16はこの凹凸に応じて立体的に屈曲変形される。屈曲変形した基材16は、凸部が鏡面仕上げとなり、凹部が印刷層24の黒色領域となる。   At this time, unevenness is formed in the lower mold 26L, and the base material 16 is three-dimensionally bent and deformed according to the unevenness. In the base material 16 that has been bent and deformed, the convex portion has a mirror finish, and the concave portion becomes a black region of the printed layer 24.

この基材16がセットされた下型26Lに対して、上型26Uをセットする。このとき、基材16の表面側の接着層18と上型26Uの天井面との間に空間が生じており、注入口28から表面材12となる透明の合成樹脂を注入する。   The upper mold 26U is set on the lower mold 26L on which the base material 16 is set. At this time, a space is created between the adhesive layer 18 on the surface side of the base material 16 and the ceiling surface of the upper mold 26U, and a transparent synthetic resin to be the surface material 12 is injected from the injection port 28.

このとき、注入口28は、通常の水平ではなく、水平に対して仰角θを持っている。これは、合成樹脂を上型26Uの天井面に向けて注入するためであり、言い換えれば、直接,接着層18に吹き付けない工夫が施されている。   At this time, the injection port 28 has an elevation angle θ with respect to the horizontal, not the normal horizontal. This is for injecting the synthetic resin toward the ceiling surface of the upper mold 26U. In other words, a device is provided that does not spray the adhesive layer 18 directly.

これにより、接着層18の温度にむらが出ず、均一に温度上昇、その後、下降するため、溶解して基材16と表面材12との密着性が確実となる。   As a result, the temperature of the adhesive layer 18 does not become uneven, the temperature rises uniformly, and then falls, so that the adhesion between the base material 16 and the surface material 12 is ensured.

表面材12が固化すると、次に、図5(E)に示される如く、裏面成形用の金型30にセットする。   When the surface material 12 is solidified, next, as shown in FIG.

このとき、下型30Lは、表面材12の形状(ドーム型)に一致した凹陥形状とされ、この表面材12を下向きにしてセットされる。   At this time, the lower mold 30L has a recessed shape that matches the shape of the surface material 12 (dome shape), and is set with the surface material 12 facing downward.

この基材16と表面材12のアッセンブリがセットされた下型30Lに対して、上型30Uをセットする。このとき、基材16の裏面(ここでは、上面)側の接着層20と上型30Uの天井面との間に空間が生じており、注入口32から裏面材14となる黒色の合成樹脂を注入する。   The upper mold 30U is set on the lower mold 30L on which the assembly of the base material 16 and the surface material 12 is set. At this time, a space is formed between the adhesive layer 20 on the back surface (here, the upper surface) side of the base material 16 and the ceiling surface of the upper mold 30U, and the black synthetic resin that becomes the back material 14 from the injection port 32 is formed. inject.

裏材16が固化すると、図5(F)に示される如く、装飾部材10が完成する。   When the backing 16 is solidified, the decorative member 10 is completed as shown in FIG.

この装飾部材10では、視覚的(意匠的)に金属調の見栄えが必要な部材であり、かつ電磁波を通過させる必要がある。   The decorative member 10 is a member that visually (designally) requires a metallic appearance and needs to pass electromagnetic waves.

そこで、金属調を出すために基材16をポリカーボネイト製等、合成樹脂製の全反射シート22で形成し、金属調をだしたため、電子の移動が制限されるような金属を用いることがなく、ミリ波の電磁波を確実に通過させることができる。   Therefore, since the base material 16 is made of a synthetic resin total reflection sheet 22 made of a polycarbonate or the like in order to obtain a metallic tone, and a metallic tone is obtained, a metal that restricts the movement of electrons is not used. Millimeter wave electromagnetic waves can be reliably transmitted.

また、印刷層24や接着層18、20は、成形時に反射シート22への熱の伝達を抑制する熱ブロック層としての役目を有するため、反射シート22の本来の機能(金属調、鏡面)を損なうことがない。   Moreover, since the printing layer 24 and the adhesive layers 18 and 20 have a role as a heat blocking layer that suppresses heat transfer to the reflection sheet 22 during molding, the original function (metal tone, mirror surface) of the reflection sheet 22 is achieved. There is no loss.

なお、前記印刷層24は、材質によっては接着機能を持つため、接着層18と兼用するようにしてもよい。   Note that the print layer 24 may have an adhesive function depending on the material, and may also be used as the adhesive layer 18.

以下に本実施の形態の作用を説明する。   The operation of this embodiment will be described below.

図6至図8には、本発明の装飾部材10を車両50のオーナメント10Aとして適用した実施例が示されている。   6 to 8 show an embodiment in which the decorative member 10 of the present invention is applied as an ornament 10A of a vehicle 50. FIG.

図6乃至図8に示される如く、車両50の前方に設けられたエンジンフード52の先端部であるフロントフェイス面は、車両幅方向両端部にヘッドライト54が設けられている。ヘッドライト54の下端部には、左右のヘッドライト54の間に掛け渡され、かつ車両50の側面面に回り込むように、バンパー56が取り付けられている。   As shown in FIGS. 6 to 8, the front face surface, which is the front end portion of the engine hood 52 provided in front of the vehicle 50, is provided with headlights 54 at both ends in the vehicle width direction. A bumper 56 is attached to the lower end portion of the headlight 54 so as to be spanned between the left and right headlights 54 and to wrap around the side surface of the vehicle 50.

ここで、エンジンフード52、一対のヘッドライト54、バンパー56によって囲まれた矩形の空間には、装飾部材としてラジエータグリル58が取り付けられている。ラジエータグリル58は、エンジンフード52に取り付けられる場合もあるし、一対のヘッドライト54の間の車両ボディ(図示省略)に取り付けられる場合もある。   Here, in a rectangular space surrounded by the engine hood 52, the pair of headlights 54, and the bumper 56, a radiator grill 58 is attached as a decorative member. The radiator grill 58 may be attached to the engine hood 52, or may be attached to a vehicle body (not shown) between the pair of headlights 54.

ラジエータグリル58は、ラジエータ(図示省略)に空気を送り込むため、所定の隙間が設けられた複数のルーバー58A(図7参照)で構成されている。なお、隙間があればよいため、ルーバー58Aに限らず、ハニカム状に形成された構造であってもよい。   The radiator grill 58 is composed of a plurality of louvers 58A (see FIG. 7) provided with a predetermined gap in order to send air into a radiator (not shown). In addition, since it is sufficient if there is a gap, not only the louver 58A but also a structure formed in a honeycomb shape may be used.

ラジエータグリル58はクロムメッキ処理されている。一方、ラジエータグリル58の正面中央に取り付けられているオーナメント10Aは、全て合成樹脂製である。   The radiator grill 58 is chrome-plated. On the other hand, the ornament 10A attached to the center of the front surface of the radiator grill 58 is all made of synthetic resin.

オーナメント10Aは、車両50のメーカーや車種を特定するマーク等をモチーフとして生成されるようになっている。この成形品が、前記装飾部材10(図1参照)である。従って、オーナメント10Aの車両前方に向いた面には、金属調の全反射シートで形成された基材16が表面材12を通して見えるようになっている。   The ornament 10 </ b> A is generated using a mark or the like for specifying the manufacturer or model of the vehicle 50 as a motif. This molded product is the decorative member 10 (see FIG. 1). Accordingly, the base material 16 formed of a metallic total reflection sheet can be seen through the surface material 12 on the surface of the ornament 10A facing the front of the vehicle.

このオーナメント10Aの車両後方側には、ミリ波レーダ60が配設されている。ミリ波レーダ60は、車両50の前方に所定の周波数(ミリ波)の電磁波を出力し、障害物に当たって反射してくる電磁波(反射波)を受信して距離を測定するための検出端末である。例えば、魚群探知機に適用されるシングアランド法のような原理が適用可能である。   A millimeter wave radar 60 is disposed on the vehicle rear side of the ornament 10A. The millimeter wave radar 60 is a detection terminal that outputs an electromagnetic wave having a predetermined frequency (millimeter wave) in front of the vehicle 50, receives the electromagnetic wave (reflected wave) reflected by an obstacle, and measures the distance. . For example, a principle such as the Sing Arland method applied to a fish finder can be applied.

ミリ波レーダ60によって検出される障害物までの距離情報は、例えば、障害物の早期発見、視野の補助、衝突予測等に適用され、運転中の安全性を助長する装備品として利用されるようになっている。   The distance information to the obstacle detected by the millimeter wave radar 60 is applied to, for example, early detection of an obstacle, assistance for a visual field, collision prediction, and the like so as to be used as equipment for promoting safety during driving. It has become.

このようなミリ波レーダ60は、オーナメント10Aの車両後方側に配設されることで、オーナメント10Aが車両走行中の風雨の防護体としての役目を兼ねる。これにより、ミリ波レーダ60の寿命を延ばすことができる。   Such a millimeter-wave radar 60 is arranged on the vehicle rear side of the ornament 10A, so that the ornament 10A also serves as a protector against wind and rain while the vehicle is running. Thereby, the lifetime of the millimeter wave radar 60 can be extended.

また、オーナメント10Aには、前述した装飾部材10(図1参照)が適用されている。このため、オーナメント10Aとしての第1の機能、すなわち、金属調に見える光沢を維持し、かつ、第2の機能、すなわち、ミリ波レーダ60から出力される電磁波、並びにその反射波を確実に通過させることができる。   Further, the decorative member 10 (see FIG. 1) described above is applied to the ornament 10A. Therefore, the first function as the ornament 10A, that is, the gloss that looks like a metallic tone is maintained, and the second function, that is, the electromagnetic wave output from the millimeter wave radar 60 and the reflected wave are surely passed. Can be made.

なお、本実施例では、装飾部材10(図1参照)を車両50のラジエータグリル58に取り付けたオーナメント10Aとして適用した例を示したが、電磁波を通過し、かつ金属調に見えるようにするための部位(例えば、車両後方や両サイドの障害物を検出するミリ波レーダ)を隠蔽するための部材として利用してもよい。   In the present embodiment, the example in which the decorative member 10 (see FIG. 1) is applied as the ornament 10A attached to the radiator grill 58 of the vehicle 50 has been described. However, in order to allow the electromagnetic wave to pass through and to appear metallic. This part may be used as a member for concealing the part (for example, a millimeter wave radar that detects an obstacle on the rear side or both sides of the vehicle).

さらに、車両に限らず、内部から電波を発信したり、外部からの電波を受ける機構のケーシングであり、金属調の見栄えが必要な場合に適用可能である。   Furthermore, it is a casing of a mechanism that transmits radio waves from the inside or receives radio waves from the outside, not limited to vehicles, and can be applied when a metallic appearance is required.

10 装飾部材
12 表面材(合成樹脂)
14 裏面材(合成樹脂)
16 基材
18、20 接着層
22 全反射シート
24 印刷層
26 金型(表面整形用金型)
26L 下型
26U 上型
28 注入口
30 金型(裏面整形用金型)
30L 下型
30U 上型
32 注入口
50 車両
10A オーナメント
52 エンジンフード
54 ヘッドライト
56 バンパー
58 ラジエータグリル
58A ルーバー
60 ミリ波レーダ
10 decorative member 12 surface material (synthetic resin)
14 Back material (synthetic resin)
16 Base material 18, 20 Adhesive layer 22 Total reflection sheet 24 Print layer 26 Mold (surface shaping mold)
26L Lower mold 26U Upper mold 28 Inlet 30 Mold (mold for back side shaping)
30L Lower mold 30U Upper mold 32 Inlet 50 Vehicle 10A Ornament 52 Engine hood 54 Headlight 56 Bumper 58 Radiator grill 58A Louver 60 Millimeter wave radar

Claims (6)

それぞれ異なる周波数帯域の光を不透過とするポリエチレン系樹脂の膜層を積層することで、光を全反射する全反射シートの少なくとも一方の面に図柄を印刷した印刷層が設けられた基材を、所定の金型にセットして、当該基材の表裏面に合成樹脂を注入することで成形された装飾部材であって、
前記基材の表裏面に接着層を設け、前記合成樹脂注入時に溶解し、前記基材と合成樹脂とを密着させることを特徴とする装飾部材。
By laminating polyethylene resin film layers that do not transmit light in different frequency bands, a base material provided with a printed layer on which at least one surface of a total reflection sheet that totally reflects light is printed is provided. , A decorative member molded by setting a predetermined mold and injecting synthetic resin on the front and back surfaces of the base material,
An ornamental member characterized in that an adhesive layer is provided on the front and back surfaces of the base material, melts when the synthetic resin is injected, and the base material and the synthetic resin are brought into close contact with each other.
前記合成樹脂注入がインジェクション成形による注入であり、その注入方向が、接着層上の合成樹脂注入空間を介した金型天井面であることを特徴とする請求項1又は請求項2記載の装飾部材。   The decorative member according to claim 1 or 2, wherein the synthetic resin injection is injection by injection molding, and an injection direction thereof is a mold ceiling surface through a synthetic resin injection space on the adhesive layer. . 前記膜層がポリエチレン系素材であり、前記印刷にアクリル系印刷インキが適用され、このアクリル系印刷インキが接着層を兼ねることを特徴とする請求項1又は請求項2記載の装飾部材。   The decorative member according to claim 1 or 2, wherein the film layer is made of a polyethylene material, and acrylic printing ink is applied to the printing, and the acrylic printing ink also serves as an adhesive layer. 前記膜層がポリエチレン系素材であり、ポリエチレン系樹脂の積層膜の表裏面に注入する材料と同系統の膜をラミネートすることで、このラミネート膜が前記接着層の代替として機能することを特徴とする請求項1又は請求項2記載の装飾部材。   The film layer is a polyethylene material, and the laminate film functions as an alternative to the adhesive layer by laminating a film of the same system as the material to be injected on the front and back surfaces of the polyethylene resin laminate film. The decorative member according to claim 1 or 2. 前記請求項1〜請求項3の何れか1項記載の装飾部材と、
所定方向に電磁波を出力し、当該出力された電磁波の反射波を受信することで、反射対象までの距離を計測する距離検出用レーダとを有し、
前記装飾部材が、前記距離検出用レーダにおける少なくとも前記電磁波出力面側に配置され前記距離検出用レーダを隠蔽することを特徴とするレーダユニット。
The decorative member according to any one of claims 1 to 3,
A distance detecting radar that outputs an electromagnetic wave in a predetermined direction and receives a reflected wave of the output electromagnetic wave to measure a distance to a reflection target;
The radar unit, wherein the decorative member is disposed at least on the electromagnetic wave output surface side of the distance detection radar and conceals the distance detection radar.
それぞれ異なる周波数帯域の光を不透過とするポリエチレン系樹脂の膜層を積層することで、光を全反射する全反射シートを所定の形状に切り取り、かつ所定の印刷を施した基材の表裏面に接着層を設け、
この接着層付の基材を表面成形用金型にセットし、表面側に合成樹脂を注入することで、前記接着層を溶解して、前記基材と、固化した前記合成樹脂とを密着してこれをアッセンブリとし、
前記アッセンブリを裏面成形用金型にセットし、裏面側に合成樹脂を注入することで、この合成樹脂の硬化過程において、前記接着層を溶解し、前記基材と前記合成樹脂とを密着することで生成する装飾部材製造方法。
Front and back surfaces of a base material that has been cut into a predetermined shape from a total reflection sheet that totally reflects light by laminating polyethylene resin film layers that do not transmit light in different frequency bands. An adhesive layer is provided on the
The base material with the adhesive layer is set in a surface molding die, and a synthetic resin is injected into the surface side to dissolve the adhesive layer, thereby bringing the base material and the solidified synthetic resin into close contact with each other. As an assembly,
The assembly is set in a back surface molding die, and a synthetic resin is injected into the back surface side, so that the adhesive layer is dissolved and the base material and the synthetic resin are brought into close contact with each other in the curing process of the synthetic resin. The decorative member manufacturing method produced | generated in.
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