JP4651107B2 - Vehicle lamp cover - Google Patents

Vehicle lamp cover Download PDF

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Publication number
JP4651107B2
JP4651107B2 JP2006040593A JP2006040593A JP4651107B2 JP 4651107 B2 JP4651107 B2 JP 4651107B2 JP 2006040593 A JP2006040593 A JP 2006040593A JP 2006040593 A JP2006040593 A JP 2006040593A JP 4651107 B2 JP4651107 B2 JP 4651107B2
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cover
resin
lamp cover
lamp
outer peripheral
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JP2007216542A (en
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彰則 山本
良 佐野
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Koito Manufacturing Co Ltd
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Koito Manufacturing Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof

Description

本発明は車輌用灯具カバーに関する。詳しくは、第１樹脂部と第２樹脂部の成形のタイミングの相違による収縮差の発生を防止する技術分野に関する。   The present invention relates to a vehicular lamp cover. Specifically, the present invention relates to a technical field that prevents the occurrence of a shrinkage difference due to a difference in molding timing between a first resin portion and a second resin portion.

車輌用灯具カバー（車輌用灯具レンズ）とランプボデイによって画成された灯室に光源が配置された車輌用灯具がある。   There is a vehicle lamp in which a light source is disposed in a lamp chamber defined by a vehicle lamp cover (vehicle lamp lens) and a lamp body.

このような車輌用灯具には、車輌用灯具カバーの外周部がランプボデイの開口側の端部に溶着、例えば、レーザー溶着によって結合されるものがある（例えば、特許文献１参照）。レーザー溶着は車輌用灯具カバーの外側から車輌用灯具カバーを介してランプボデイの開口側の端部にレーザーを照射してランプボデイを加熱し、ランプボデイに加えられた熱が車輌用灯具カバーの外周部に伝導されることにより該外周部が溶融されてランプボデイに車輌用灯具カバーを結合させる方法である。レーザー溶着は、ランプボデイと車輌用灯具カバーの結合面として溶着強度に必要な面積を確保するだけで高い結合強度が得られるという利点を有している。   Among such vehicular lamps, there is a vehicular lamp cover in which the outer peripheral portion of the vehicular lamp cover is joined to the end of the lamp body on the opening side, for example, by laser welding (see, for example, Patent Document 1). Laser welding heats the lamp body by irradiating a laser beam from the outside of the vehicle lamp cover to the end of the lamp body through the vehicle lamp cover, and the heat applied to the lamp body is applied to the lamp cover of the vehicle. In this method, the outer periphery is melted by being conducted to the outer periphery, and the lamp cover for the vehicle is coupled to the lamp body. Laser welding has the advantage that high bonding strength can be obtained simply by securing an area necessary for welding strength as a bonding surface between the lamp body and the vehicle lamp cover.

一方、車輌用灯具には、射出成形によって先に形成される第１のカバー部（第１樹脂部）と射出成形によって後に形成される第２のカバー部（第２樹脂部）とが二色成形によって結合されて成る車輌用灯具カバーがある（例えば、特許文献１参照）。   On the other hand, the vehicular lamp has two colors: a first cover part (first resin part) formed first by injection molding and a second cover part (second resin part) formed later by injection molding. There is a vehicle lamp cover that is joined by molding (for example, see Patent Document 1).

このような二色成形によって形成された車輌用灯具カバーについても、レーザー溶着によってランプボデイに結合される場合がある。   The vehicular lamp cover formed by such two-color molding may also be coupled to the lamp body by laser welding.

特開２００５−８５５６７号公報JP 2005-85567 A

ところで、ランプボデイに接着等によって結合される車輌用灯具カバーは、一般に、所定の形状に形成されたレンズ本体部と該レンズ本体部の外周部の全周からランプボデイ側に突出されたシール脚とによって構成され、該シール脚の先端部がランプボデイに接着等によって結合される。従って、二色成形によって形成されランプボデイに接着等によって結合される車輌用灯具カバーにおいては、シール脚とレンズ本体部が異なる向きで成形用金型に貼り付き該成形用金型に拘束された状態で溶融樹脂の射出後に冷却されるため、レンズ本体部に収縮（ヒケ）が生じ難い。   By the way, a vehicular lamp cover to be joined to a lamp body by adhesion or the like generally includes a lens body portion formed in a predetermined shape and a seal leg protruding from the entire outer periphery of the lens body portion toward the lamp body side. The tip end of the seal leg is coupled to the lamp body by bonding or the like. Therefore, in the vehicular lamp cover formed by two-color molding and bonded to the lamp body by bonding or the like, the seal leg and the lens main body portion are attached to the molding die in different directions and are restrained by the molding die. In this state, the lens body is cooled after the injection of the molten resin, so that it is difficult for the lens body portion to shrink (sink).

ところが、ランプボデイにレーザー溶着によって結合される車輌用灯具カバーには、シール脚に相当する部分が存在しないため、溶融樹脂の射出後の冷却時における収縮が問題となる。このような収縮の問題は、二色成形によって第１のカバー部と第２のカバー部が順に形成され、第１のカバー部の一端部がランプボデイの開口側の端部に結合される外周部の一部を構成するような車輌用灯具カバーａ（図７参照）において生じ得る。   However, since there is no portion corresponding to the seal leg in the vehicular lamp cover joined to the lamp body by laser welding, there is a problem of shrinkage during cooling after injection of the molten resin. The problem of such shrinkage is that the first cover portion and the second cover portion are sequentially formed by two-color molding, and one end portion of the first cover portion is joined to the end portion on the opening side of the lamp body. This may occur in a vehicle lamp cover a (see FIG. 7) that constitutes a part of the portion.

具体的には、先に形成された第１のカバー部ｂがシール脚を有しないため、その一端部ｃが成形用金型に拘束されず、第１のカバー部ｂの収縮により一端部ｃが第２のカバー部ｄの一端部ｅに対して位置がずれてしまい、一端部ｃと一端部ｅの間に段差ｆが生じるおそれがある。このような段差ｆが生じてしまうと、一端部ｃを溶着によってランプボデイに結合させることができないという不具合を生じてしまう。   Specifically, since the previously formed first cover portion b does not have a seal leg, one end portion c thereof is not constrained by the molding die, and the first end portion c is contracted by the contraction of the first cover portion b. However, the position of the second cover portion d may be shifted with respect to the one end portion e of the second cover portion d, and a step f may be generated between the one end portion c and the one end portion e. If such a level difference f occurs, there arises a problem that the one end c cannot be joined to the lamp body by welding.

そこで、本発明車輌用灯具カバーは、第１樹脂部と第２樹脂部の成形のタイミングの相違による収縮差の発生を防止することを課題とする。   Therefore, an object of the vehicular lamp cover of the present invention is to prevent the occurrence of a shrinkage difference due to a difference in molding timing between the first resin portion and the second resin portion.

本発明車輌用灯具カバーは、上記した課題を解決するために、射出成形によって先に形成される第１樹脂部と、射出成形によって第１樹脂部より後に形成され該第１樹脂部の外周部における一端部を除いた部分に結合された第２樹脂部とを設け、第１樹脂部の上記一端部がランプボデイの開口側の端部に結合される外周部の一部を構成し、ランプボデイの開口側の端部に結合される外周部を平坦状に形成し、第１樹脂部の内面の外周部に突条部を形成し、第１樹脂部の内面の上記一端部の近傍に上記突条部の突出量より大きなリブを設けたものである。 In order to solve the above-described problem, the vehicle lamp cover according to the present invention includes a first resin portion formed first by injection molding and an outer peripheral portion of the first resin portion formed after the first resin portion by injection molding. A second resin portion coupled to a portion excluding one end portion of the first resin portion, wherein the one end portion of the first resin portion constitutes a part of an outer peripheral portion coupled to an end portion on the opening side of the lamp body, The outer peripheral part coupled to the end part on the opening side of the body is formed in a flat shape , the ridge part is formed on the outer peripheral part of the inner surface of the first resin part, and in the vicinity of the one end part on the inner surface of the first resin part A rib larger than the protruding amount of the protruding portion is provided.

従って、本発明車輌用灯具カバーにあっては、溶融樹脂の射出後の冷却時において、リブによって第１樹脂部が成形用金型に拘束された状態とされるため、第１樹脂部の不必要な収縮を防止することができる。 Therefore, in the present invention vehicular lamp cover, at the time of cooling after the injection of the molten resin, the first resin portion by the ribs is a state of being constrained to mold, the first resin portion not Necessary shrinkage can be prevented.

本発明車輌用灯具カバーは、射出成形によって形成されると共に外周部がランプボデイの開口側の端部に溶着によって結合される車輌用灯具カバーであって、射出成形によって先に形成される第１樹脂部と、射出成形によって第１樹脂部より後に形成され該第１樹脂部の外周部における一端部を除いた部分に結合された第２樹脂部とを備え、第１樹脂部の上記一端部がランプボデイの開口側の端部に結合される外周部の一部を構成し、ランプボデイの開口側の端部に結合される外周部を平坦状に形成し、第１樹脂部の内面の外周部に突条部を形成し、第１樹脂部の内面の上記一端部の近傍に上記突条部の突出量より大きなリブを設けたことを特徴とする。 The vehicular lamp cover of the present invention is a vehicular lamp cover that is formed by injection molding and whose outer peripheral portion is joined to the end of the lamp body on the opening side by welding, and is the first formed by injection molding. A resin portion and a second resin portion formed after the first resin portion by injection molding and joined to a portion excluding one end portion of the outer peripheral portion of the first resin portion, and the one end portion of the first resin portion Constitutes a part of the outer peripheral part coupled to the end part on the opening side of the lamp body, the outer peripheral part coupled to the end part on the opening side of the lamp body is formed in a flat shape, and the inner surface of the first resin part A protruding portion is formed on the outer peripheral portion, and a rib larger than the protruding amount of the protruding portion is provided in the vicinity of the one end portion of the inner surface of the first resin portion .

従って、第１樹脂部がリブによって成形用金型に冷却時における収縮方向に拘束されるため、第１樹脂部の不必要な収縮を防止することができる。   Therefore, since the first resin portion is restrained by the rib in the shrinkage direction during cooling to the molding die, unnecessary shrinkage of the first resin portion can be prevented.

請求項２に記載した発明にあっては、第１樹脂部と第２樹脂部を互いに厚み方向において重ね合わせて結合し、上記リブを、第１樹脂部の第２樹脂部に重ね合わせて結合した部分の内面から上記厚み方向に突出するように設けたので、車輌用灯具カバーを外面側から視認したときにリブが目立つことがなく、車輌用灯具カバーのデザイン性の向上及び視認性の向上を図ることができる。   In the invention described in claim 2, the first resin portion and the second resin portion are overlapped and bonded to each other in the thickness direction, and the rib is overlapped and bonded to the second resin portion of the first resin portion. The ribs do not stand out when the vehicle lamp cover is viewed from the outer surface side, so that the design of the vehicle lamp cover is improved and the visibility is improved. Can be achieved.

請求項３に記載した発明にあっては、上記リブの先端面を、射出成型機のイジェクトピンに突き当てられる被突き当て面として形成したので、イジェクトピンにリブが貼り付き、射出成形機の成形用金型の離型時に、イジェクトピンが支持されていない側の成形用金型への貼り付きを防止することができる。   In the invention described in claim 3, since the tip end surface of the rib is formed as an abutted surface to be abutted against the eject pin of the injection molding machine, the rib sticks to the eject pin, and the injection molding machine When the molding die is released, sticking to the molding die on the side where the eject pin is not supported can be prevented.

請求項４に記載した発明にあっては、第１樹脂部の上記一端部の近傍にレンズステップを形成したので、意匠性の向上を図ることができると共にレンズステップによる第１樹脂部の収縮の抑制を図ることができる。   In the invention described in claim 4, since the lens step is formed in the vicinity of the one end portion of the first resin portion, it is possible to improve the design and reduce the shrinkage of the first resin portion by the lens step. Suppression can be achieved.

以下に、本発明車輌用灯具カバーを実施するための最良の形態について添付図面を参照して説明する。   The best mode for carrying out the vehicle lamp cover of the present invention will be described below with reference to the accompanying drawings.

以下に示した最良の形態は、本発明車輌用灯具カバーを車輌用灯具としてのリアコンビネーションランプに用いられる車輌用灯具カバーに適用したものである。尚、本発明の適用範囲はリアコンビネーションランプに用いられる車輌用灯具カバーに限られることはなく、車輌用灯具カバーとランプボデイによって画成された灯室に光源が配置された各種の車輌用灯具に用いられる車輌用灯具カバーに広く適用することができる。   In the best mode shown below, the vehicle lamp cover of the present invention is applied to a vehicle lamp cover used in a rear combination lamp as a vehicle lamp. The scope of application of the present invention is not limited to the vehicular lamp cover used for the rear combination lamp, but various vehicular lamps in which a light source is arranged in a lamp chamber defined by the vehicular lamp cover and the lamp body. The present invention can be widely applied to a vehicular lamp cover used in the above.

また、車輌用灯具カバーは、出射される光に対して所定の機能を発揮する車輌用灯具レンズをも含むものである。車輌用灯具カバーは後述するように第１のカバー部と第２のカバー部によって構成されるが、車輌用灯具レンズの場合には第１のレンズ部と第２のレンズ部によって構成されることになる。   The vehicle lamp cover also includes a vehicle lamp lens that exhibits a predetermined function with respect to the emitted light. As will be described later, the vehicle lamp cover is composed of a first cover portion and a second cover portion. In the case of a vehicle lamp lens, the vehicle lamp cover is composed of a first lens portion and a second lens portion. become.

車輌用灯具（リアコンビネーションランプ）１は、ランプボデイ２と該ランプボデイ２の開口を閉塞する車輌用灯具カバー３とを有し、ランプボデイ２が車体１００に取り付けられている（図１及び図２参照）。   A vehicular lamp (rear combination lamp) 1 includes a lamp body 2 and a vehicular lamp cover 3 that closes an opening of the lamp body 2, and the lamp body 2 is attached to a vehicle body 100 (FIGS. 1 and FIG. 1). 2).

ランプボデイ２は、例えば、後方及び側方に開口され、ランプボデイ２と車輌用灯具カバー３によって画成された内部空間が灯室４として形成されている（図２参照）。   The lamp body 2 is opened, for example, rearward and laterally, and an internal space defined by the lamp body 2 and the vehicle lamp cover 3 is formed as a lamp chamber 4 (see FIG. 2).

ランプボデイ２には灯室４内に配置される光源５、５が取り付けられている。光源５、５は、例えば、白熱バルブであってもよく、また、発光ダイオード等であってもよい。   The lamp body 2 is provided with light sources 5 and 5 disposed in the lamp chamber 4. The light sources 5 and 5 may be, for example, incandescent bulbs or light emitting diodes.

灯室４内にはリフレクター６が配置されている。リフレクター６は光源５、５から出射された光を反射して所定の方向へ導く役割を果たす。   A reflector 6 is disposed in the lamp chamber 4. The reflector 6 plays a role of reflecting light emitted from the light sources 5 and 5 and guiding it in a predetermined direction.

リフレクター６にはインナーカバー７が取り付けられている。インナーカバー７は光源５、５を閉塞した状態でリフレクター６に取り付けられている。   An inner cover 7 is attached to the reflector 6. The inner cover 7 is attached to the reflector 6 with the light sources 5 and 5 closed.

灯室４内にはインナーレンズ８が配置されている。インナーレンズ８は車輌用灯具カバー３の内側に沿うようにして配置されている。   An inner lens 8 is disposed in the lamp chamber 4. The inner lens 8 is disposed along the inside of the vehicle lamp cover 3.

車輌用灯具カバー３は異なる色の樹脂材料を用いる所謂二色成形によって形成され、例えば、無色透明な第１のカバー部（第１樹脂部）９と、例えば、赤色の第２のカバー部（第２樹脂部）１０が結合されて成る。   The vehicular lamp cover 3 is formed by so-called two-color molding using resin materials of different colors. For example, a colorless and transparent first cover portion (first resin portion) 9 and, for example, a red second cover portion ( (Second resin part) 10 is combined.

第１のカバー部９は前後に長い形状に形成され、前端部が車輌用灯具カバー３の外周部の一部を構成している（図３参照）。第１のカバー部９の長手方向における一端、即ち、後端に寄った位置には、その内面に上下に延びるレンズステップ９ａ、９ａ、・・・が形成されている。第１のカバー部９の内面の後端部、即ち、レンズステップ９ａ、９ａ、・・・の後側の部分は略平坦状の溶着部９ｂとして形成されている。   The first cover portion 9 is formed in a long shape in the front-rear direction, and the front end portion constitutes a part of the outer peripheral portion of the vehicular lamp cover 3 (see FIG. 3). Lens steps 9a, 9a,... Extending vertically are formed on the inner surface at one end in the longitudinal direction of the first cover portion 9, that is, a position close to the rear end. A rear end portion of the inner surface of the first cover portion 9, that is, a rear portion of the lens steps 9a, 9a,... Is formed as a substantially flat weld portion 9b.

第１のカバー部９の内面には、後端部を除く外周部に突条部９ｃが設けられている。第１のカバー部９の外周縁には、後端部を除いた部分に段差部９ｄが形成されている（図４参照）。   On the inner surface of the first cover portion 9, a ridge portion 9c is provided on the outer peripheral portion excluding the rear end portion. On the outer peripheral edge of the first cover portion 9, a step portion 9d is formed in a portion excluding the rear end portion (see FIG. 4).

第１のカバー部９の後端寄りの位置には、上下に離隔してリブ１１、１１が設けられている（図３及び図５参照）。リブ１１、１１は突条部９ｃの突出量より大きくされ、突条部９ｃの後端部に設けられている。リブ１１、１１の突条部９ｃからの突出量は、例えば、０．５ｍｍ乃至１．０ｍｍとされている。   Ribs 11 and 11 are provided at positions near the rear end of the first cover portion 9 so as to be spaced apart from each other (see FIGS. 3 and 5). The ribs 11 and 11 are made larger than the protrusion amount of the protrusion part 9c, and are provided in the rear-end part of the protrusion part 9c. The protruding amount of the ribs 11 and 11 from the protruding portion 9c is, for example, 0.5 mm to 1.0 mm.

第１のカバー部９は、溶着部９ｂが、レンズステップ９ａ、９ａ、・・・が設けられた部分、突条部９ｃ及び段差部９ｄの各部分を除いた部分と厚みが略同じに形成されている。   The first cover portion 9 has a welded portion 9b that is substantially the same in thickness as the portions excluding the portions where the lens steps 9a, 9a,... Are provided, the protruding portion 9c, and the stepped portion 9d. Has been.

第２のカバー部１０は第１のカバー部９の後端部以外の部分を外側から覆うように設けられ、内面における後端に寄った位置に上下に延びるレンズステップ１０ａ、１０ａ、・・・が形成されている。第２のカバー部１０の外周部の内面は平坦状又は滑らかな曲面状を為す溶着部１０ｂとして形成されている。   The second cover portion 10 is provided so as to cover a portion other than the rear end portion of the first cover portion 9 from the outside, and the lens steps 10a, 10a,. Is formed. The inner surface of the outer peripheral part of the second cover part 10 is formed as a welded part 10b having a flat or smooth curved surface.

第２のカバー部１０の内周縁、即ち、第１のカバー部１０の外周縁が結合される部分には、段差部１０ｃが形成されている（図４参照）。第２のカバー部１０の段差部１０ｃは第１のカバー部９の段差部９ｄに嵌合されて結合されている。   A stepped portion 10c is formed at the inner peripheral edge of the second cover portion 10, that is, the portion where the outer peripheral edge of the first cover portion 10 is coupled (see FIG. 4). The step portion 10 c of the second cover portion 10 is fitted and joined to the step portion 9 d of the first cover portion 9.

第２のカバー部１０は、溶着部１０ｂが、レンズステップ１０ａ、１０ａ、・・・が設けられた部分及び段差部１０ｃの各部分を除いた部分と厚みが略同じに形成されている。   The second cover portion 10 is formed so that the welded portion 10b has substantially the same thickness as the portion excluding the portions where the lens steps 10a, 10a,.

車輌用灯具カバー３は、射出成形機２００を用いて二色成形によって以下のようにして形成される（図６参照）。   The vehicular lamp cover 3 is formed as follows by two-color molding using an injection molding machine 200 (see FIG. 6).

射出成形機２００は、例えば、第１の成形用金型２０１と第２の成形用金型２０２と図示しない第３の成形用金型を有し、例えば、第２の成形用金型２０２に成形用凹部２０３が形成されている。成形用凹部２０３の一部には拘束用凹部２０３ａ、２０３ａが形成されている。第２の成形用金型２０２には複数のイジェクトピン２０４、２０４、・・・が移動自在に支持されている。   The injection molding machine 200 has, for example, a first molding die 201, a second molding die 202, and a third molding die (not shown). A molding recess 203 is formed. Restraining recesses 203a and 203a are formed in part of the molding recess 203. A plurality of eject pins 204, 204,... Are movably supported on the second molding die 202.

先ず、第１の成形用金型２０１と第２の成形用金型２０２が突き合わされて形成されたキャビティー２０５に第１のカバー部９用の溶融樹脂が充填され、充填された溶融樹脂が冷却されることにより第１のカバー部９が形成される。成形用凹部２０３の拘束用凹部２０３ａ、２０３ａに充填された溶融樹脂によってそれぞれリブ１１、１１が形成される。   First, a molten resin for the first cover portion 9 is filled in a cavity 205 formed by abutting the first molding die 201 and the second molding die 202, and the filled molten resin is filled with the molten resin. The 1st cover part 9 is formed by being cooled. The ribs 11 and 11 are formed by the molten resin filled in the constraining recesses 203a and 203a of the molding recess 203, respectively.

次に、第１の成形用金型２０１が第２の成形用金型２０２から離型される。このとき第１のカバー部９には突条部９ｃが設けられているため、該突条部９ｃによって第１のカバー部９が第２の成形用金型２０２に第１の成形用金型２０１の離型方向において拘束される。従って、第１の成形用金型２０１の第２の成形用金型２０２からの離型時に、第１のカバー部９の第１の成形用金型２０１への貼り付きが防止される。   Next, the first molding die 201 is released from the second molding die 202. At this time, since the first cover portion 9 is provided with the ridge portion 9c, the first cover portion 9 is transferred to the second molding die 202 by the ridge portion 9c. Restrained in the mold release direction 201. Therefore, when the first molding die 201 is released from the second molding die 202, sticking of the first cover portion 9 to the first molding die 201 is prevented.

第１の成形用金型２０１が第２の成形用金型２０２から離型されると、例えば、第３の成形用金型が第２の成形用金型２０２に突き合わされ、第２の成形用金型２０２と第３の成形用金型によって第２のカバー部１０を形成するための新たなキャビティーが形成される。この新たなキャビティーに第２のカバー部１０用の溶融樹脂が充填され、充填された溶融樹脂が冷却されることにより第２のカバー部１０が形成される。新たなキャビティーに第２のカバー部１０用の溶融樹脂が充填され、充填された溶融樹脂が冷却されるときに第２のカバー部１０と第１のカバー部９が結合されて車輌用灯具カバー３が形成される。   When the first molding die 201 is released from the second molding die 202, for example, the third molding die is abutted against the second molding die 202 and the second molding die is pressed. A new cavity for forming the second cover portion 10 is formed by the working mold 202 and the third molding mold. The new cavity is filled with the molten resin for the second cover portion 10, and the filled resin is cooled to form the second cover portion 10. A new cavity is filled with a molten resin for the second cover portion 10, and when the filled molten resin is cooled, the second cover portion 10 and the first cover portion 9 are coupled to each other so that a vehicle lamp is obtained. A cover 3 is formed.

上記のように、第１のカバー部９が第２のカバー部１０より先に形成され両者の冷却時が異なるが、第１のカバー部９はリブ１１、１１によって第１の成形用金型２０１の離型方向と略直交する方向において第２の成形用金型２０２に拘束された状態とされているため、第１のカバー部９の不必要な収縮を防止することができる。   As described above, the first cover portion 9 is formed before the second cover portion 10 and the cooling time differs between the first cover portion 9 and the first cover portion 9 by the ribs 11, 11. Since the second molding die 202 is restrained in a direction substantially orthogonal to the mold release direction 201, unnecessary shrinkage of the first cover portion 9 can be prevented.

車輌用灯具カバー３はイジェクトピン２０４、２０４、・・・によって突き出されて第２の成形用金型２０２から取り出される。イジェクトピン２０４、２０４、・・・の車輌用灯具カバー３に対する突き出し位置は、第１のカバー部９にあっては突条部９ｃ及びリブ１１、１１とされ、第２のカバー部１０にあっては外周部とされている。従って、第１のカバー部９にあっては、突条部９ｃの先端面とリブ１１、１１の先端面１１ａ、１１ａとがイジェクトピン２０４、２０４、・・・に突き当てられる被突き当て面とされる。   The vehicle lamp cover 3 is ejected by eject pins 204, 204,... And taken out from the second molding die 202. The protruding positions of the eject pins 204, 204,... With respect to the vehicle lamp cover 3 are the ridge 9 c and the ribs 11, 11 in the first cover 9, and The outer peripheral part. Therefore, in the 1st cover part 9, the to-be-abutted surface by which the front end surface of the protrusion part 9c and the front end surfaces 11a and 11a of the ribs 11 and 11 are abutted by the eject pins 204, 204, ... It is said.

上記のようにして形成された車輌用灯具カバー３は、溶着部９ｂ及び溶着部１０ｂがランプボデイ２の開口側の端部に、例えば、レーザー溶着によって固定される。   In the vehicular lamp cover 3 formed as described above, the welded portion 9b and the welded portion 10b are fixed to the end of the lamp body 2 on the opening side, for example, by laser welding.

車輌用灯具カバー３にあっては、第１のカバー部９の外周部と第２のカバー部１０の内周部とが厚み方向において重ね合わされて結合され、リブ１１、１１が第１のカバー部９と第２のカバー部１０の結合部分に設けられているため、車輌用灯具カバー３を外面側から視認したときにリブ１１、１１が目立つことがなく、車輌用灯具カバー３のデザイン性の向上及び視認性の向上を図ることができる。   In the vehicle lamp cover 3, the outer peripheral portion of the first cover portion 9 and the inner peripheral portion of the second cover portion 10 are overlapped and joined in the thickness direction, and the ribs 11 and 11 are the first cover. The ribs 11 and 11 do not stand out when the vehicular lamp cover 3 is viewed from the outer surface side, and the design of the vehicular lamp cover 3 is provided because it is provided at the joint portion between the portion 9 and the second cover portion 10. And visibility can be improved.

また、リブ１１、１１の先端面１１ａ、１１ａがそれぞれイジェクトピン２０４、２０４に突き当てられる被突き当て面として用いられているため、イジェクトピン２０４、２０４にリブ１１、１１が貼り付き、第１の成形用金型２０１の第２の成形用金型２０２からの離型時に、第１のカバー部９の第１の成形用金型２０１への貼り付きを防止することができる。   Moreover, since the front end surfaces 11a and 11a of the ribs 11 and 11 are used as the abutting surfaces to be abutted against the eject pins 204 and 204, the ribs 11 and 11 are attached to the eject pins 204 and 204, respectively. When the molding die 201 is released from the second molding die 202, the first cover portion 9 can be prevented from sticking to the first molding die 201.

尚、イジェクトピン２０４、２０４の先端面の大きさ及び形状を被突き当て面として機能するリブ１１、１１の先端面１１ａ、１１ａの大きさ及び形状と同じにすることも可能である。このように両者の大きさ及び形状を同じにすることにより、第１の成形用金型２０１の第２の成形用金型２０２からの離型時における第１のカバー部９の第１の成形用金型２０１への貼り付きの防止効果を高めることができる。   The size and shape of the tip surfaces of the eject pins 204 and 204 may be the same as the size and shape of the tip surfaces 11a and 11a of the ribs 11 and 11 that function as the abutted surfaces. Thus, by making both magnitude | size and shape the same, the 1st shaping | molding of the 1st cover part 9 at the time of mold release from the 2nd shaping die 202 of the 1st shaping die 201 is carried out. The effect of preventing sticking to the metal mold 201 can be enhanced.

さらに、第１のカバー部９の前端部にレンズステップ９ａ、９ａ、・・・が形成されているため、意匠性の向上を図ることができると共にレンズステップ９ａ、９ａ、・・・による第１のカバー部９の収縮の抑制を図ることができる。   Further, since the lens steps 9a, 9a,... Are formed at the front end portion of the first cover portion 9, the design can be improved and the first steps by the lens steps 9a, 9a,. The shrinkage of the cover portion 9 can be suppressed.

尚、上記には、第１のカバー部９に２つのリブ１１、１１を設けた例を示したが、リブ１１の数は単数であっても３つ以上の複数であってもよく、車輌用灯具カバー３の視認性や生産性に支障を来たさない範囲で任意の数を設けることが可能である。   In addition, although the example which provided the two ribs 11 and 11 in the 1st cover part 9 was shown above, the number of the ribs 11 may be single, or may be three or more. Any number can be provided as long as the visibility and productivity of the lamp cover 3 are not hindered.

また、上記には、ランプボデイ２への車輌用灯具カバー３の溶着の例としてレーザー溶着について示したが、ランプボデイ２への車輌用灯具カバー３の溶着はレーザー溶着に限られることはなく、外周部にシール脚が設けられていない車輌用灯具カバーの溶着であれば、他の方法による溶着であってもよい。   In the above, laser welding is shown as an example of welding of the vehicle lamp cover 3 to the lamp body 2, but welding of the vehicle lamp cover 3 to the lamp body 2 is not limited to laser welding. Any other method of welding may be used as long as the vehicle lamp cover is not welded to the outer periphery.

上記した最良の形態において示した各部の形状及び構造は、何れも本発明を実施するに際して行う具体化のほんの一例を示したものに過ぎず、これらによって本発明の技術的範囲が限定的に解釈されることがあってはならないものである。   The shapes and structures of the respective parts shown in the above-described best mode are merely examples of implementations in carrying out the present invention, and the technical scope of the present invention is limitedly interpreted by these. It should not be done.

図２乃至図６と共に本発明の最良の形態を示すものであり、本図は車輌用灯具の正面図である。FIG. 2 to FIG. 6 show the best mode of the present invention, and this figure is a front view of a vehicular lamp. 図１のＩＩ−ＩＩ線に沿う断面図である。It is sectional drawing which follows the II-II line | wire of FIG. 車輌用灯具カバーの斜視図である。It is a perspective view of the lamp cover for vehicles. 第１のカバー部と第２のカバー部の結合部分を示す拡大断面図である。It is an expanded sectional view showing the joint part of the 1st cover part and the 2nd cover part. 要部の拡大斜視図である。It is an expansion perspective view of the principal part. 成形用金型によって第１のカバー部を形成している状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which forms the 1st cover part with the metal mold | die for shaping | molding. 従来の問題点を説明するための概念図である。It is a conceptual diagram for demonstrating the conventional problem.

符号の説明Explanation of symbols

２…ランプボデイ、３…車輌用灯具カバー、９…第１のレンズ（第１樹脂部）、９ａ…レンズステップ、９ｃ…突条部、１０…第２のレンズ（第２樹脂部）、１１…リブ、１１ａ…先端面、２００…射出成型機、２０４…イジェクトピン DESCRIPTION OF SYMBOLS 2 ... Lamp body, 3 ... Vehicle lamp cover, 9 ... 1st lens (1st resin part), 9a ... Lens step, 9c ... Projection part, 10 ... 2nd lens (2nd resin part), 11 ... Rib, 11a ... Tip surface, 200 ... Injection molding machine, 204 ... Eject pin

Claims (4)

射出成形によって形成されると共に外周部がランプボデイの開口側の端部に溶着によって結合される車輌用灯具カバーであって、
射出成形によって先に形成される第１樹脂部と、
射出成形によって第１樹脂部より後に形成され該第１樹脂部の外周部における一端部を除いた部分に結合された第２樹脂部とを備え、
第１樹脂部の上記一端部がランプボデイの開口側の端部に結合される外周部の一部を構成し、
ランプボデイの開口側の端部に結合される外周部を平坦状に形成し、
第１樹脂部の内面の外周部に突条部を形成し、第１樹脂部の内面の上記一端部の近傍に上記突条部の突出量より大きなリブを設けた
ことを特徴とする車輌用灯具カバー。 A vehicular lamp cover that is formed by injection molding and whose outer peripheral portion is joined to an end portion on the opening side of the lamp body by welding,
A first resin portion previously formed by injection molding;
A second resin portion formed after the first resin portion by injection molding and coupled to a portion excluding one end portion of the outer peripheral portion of the first resin portion;
The one end portion of the first resin portion constitutes a part of the outer peripheral portion coupled to the end portion on the opening side of the lamp body,
The outer peripheral part joined to the end of the lamp body on the opening side is formed in a flat shape,
A ridge portion is formed on the outer peripheral portion of the inner surface of the first resin portion, and a rib larger than the protruding amount of the ridge portion is provided in the vicinity of the one end portion of the inner surface of the first resin portion . Lamp cover. 第１樹脂部と第２樹脂部を互いに厚み方向において重ね合わせて結合し、
上記リブを、第１樹脂部の第２樹脂部に重ね合わせて結合した部分の内面から上記厚み方向に突出するように設けた
ことを特徴とする請求項１に記載の車輌用灯具カバー。 The first resin part and the second resin part are overlapped and bonded together in the thickness direction,
2. The vehicular lamp cover according to claim 1, wherein the rib is provided so as to protrude in the thickness direction from an inner surface of a portion where the rib is overlapped with and bonded to the second resin portion of the first resin portion. 上記リブの先端面を、射出成型機のイジェクトピンに突き当てられる被突き当て面として形成した
ことを特徴とする請求項１又は請求項２に記載の車輌用灯具カバー。 3. The vehicular lamp cover according to claim 1, wherein the front end surface of the rib is formed as an abutted surface that abuts against an eject pin of an injection molding machine. 第１樹脂部の上記一端部の近傍にレンズステップを形成した
ことを特徴とする請求項１、請求項２又は請求項３に記載の車輌用灯具カバー。 4. The vehicular lamp cover according to claim 1, wherein a lens step is formed in the vicinity of the one end portion of the first resin portion.
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IT1398426B1 (en) * 2010-02-23 2013-02-22 Automotive Lighting Rear Lamps Italia S P A METHOD FOR THE INJECTION MOLDING OF LENTICULAR BODIES IN PLASTIC MATERIALS FOR MOTOR VEHICLES AND SIMILARS, AND LENTICULAR BODY FOR MOTOR VEHICLES AND SIMILAR LIGHTS.
JP6025539B2 (en) * 2012-12-11 2016-11-16 株式会社小糸製作所 Vehicle lamp parts
JP2014135141A (en) * 2013-01-08 2014-07-24 Stanley Electric Co Ltd Lamp fitting for vehicle
JP2015205494A (en) * 2014-04-23 2015-11-19 株式会社小糸製作所 Two-color molding method, metal die for two-color molding, and two-color molded article
JP6371100B2 (en) * 2014-04-23 2018-08-08 株式会社小糸製作所 Two-color molding method
FR3037380B1 (en) * 2015-06-12 2020-01-17 Valeo Vision ICE FOR LIGHTING DEVICE AND ITS MANUFACTURING METHOD

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JPH11265606A (en) * 1998-03-18 1999-09-28 Koito Mfg Co Ltd Marker lamp for vehicle
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Publication number Priority date Publication date Assignee Title
JPS62108019A (en) * 1985-11-07 1987-05-19 Yoshida Kogyo Kk <Ykk> Method and apparatus for molding multi-color synthetic resin molding and product thereof
JPH046703A (en) * 1990-04-24 1992-01-10 Mitsubishi Motors Corp Lens for vehicle lighting fixture and manufacture thereof
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