JP2016213008A - Laser deposition structure - Google Patents

Laser deposition structure Download PDF

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Publication number
JP2016213008A
JP2016213008A JP2015093888A JP2015093888A JP2016213008A JP 2016213008 A JP2016213008 A JP 2016213008A JP 2015093888 A JP2015093888 A JP 2015093888A JP 2015093888 A JP2015093888 A JP 2015093888A JP 2016213008 A JP2016213008 A JP 2016213008A
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Prior art keywords
welding
surface portion
front cover
laser
light
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亮介 安田
Ryosuke Yasuda
亮介 安田
裕至 提坂
Yuji Sagesaka
裕至 提坂
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Koito Manufacturing Co Ltd
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Koito Manufacturing Co Ltd
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    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser welding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1687—Laser beams making use of light guides
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1687—Laser beams making use of light guides
    • B29C65/169—Laser beams making use of light guides being a part of the joined article
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/301—Three-dimensional joints, i.e. the joined area being substantially non-flat
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/733—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
    • B29C66/7332—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being coloured
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • 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
    • B29L2031/747—Lightning equipment

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
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Abstract

PROBLEM TO BE SOLVED: To provide a laser deposition structure capable of depositing, with laser light, a member having a low translucent area such as a color area for preventing a deposited surface part that is laser deposited from being exposed.SOLUTION: This invention relates to a laser deposited structure (a lamp housing) 1 in which a first resin member (a lamp body) 2 and a second transparent resin member (a front cover) 3 having integrally a low translucent area (color area) 3b with a partial low light transmittance rate are laser deposited. A deposited surface part 2a having the first resin member 2 and the second resin member 3 deposited to each other is arranged at a rear part of the low translucent area 3b. The second resin member 3b has integrally deposited legs 31 (32 to 35) for guiding laser light irradiated against an area other than the low translucent area 3b to the deposited surface part 2a.SELECTED DRAWING: Figure 2

Description

本発明はレーザ光を照射して第１の部材と第２の部材を溶着したレーザ溶着構造体、例えばランプボディに正面カバーを溶着したランプハウジングに適用して好適なレーザ溶着構造体に関するものである。   The present invention relates to a laser welding structure in which a first member and a second member are welded by irradiating laser light, for example, a laser welding structure suitable for application to a lamp housing in which a front cover is welded to a lamp body. is there.

車両用ランプを製造する工程の一つに容器状をしたランプボディに透明な正面カバーを一体的に固着する工程があり、この固着する工程としてランプボディと正面カバーを溶着する技術が用いられている。この正面カバーは前面カバーと称することもあるが、ここでは正面カバーと称している。例えば、後に参照する図１（ａ），（ｂ）に示すように、正面を開口した容器状のランプボディ２と、このランプボディ２の正面開口に固着する透明な樹脂製の正面カバー３とでランプハウジング１を構成する場合に、ランプボディ２の正面開口の周縁部２１の表面に正面カバー３の内面を密着させ、この密着した領域において両者を溶着して一体化している。   One of the processes for manufacturing a lamp for a vehicle is a process of fixing a transparent front cover integrally to a container-shaped lamp body, and a technique of welding the lamp body and the front cover is used as the fixing process. Yes. Although this front cover is sometimes referred to as a front cover, it is referred to herein as a front cover. For example, as shown in FIGS. 1A and 1B to be described later, a container-shaped lamp body 2 having an open front, and a transparent resin front cover 3 fixed to the front opening of the lamp body 2 are provided. When the lamp housing 1 is configured, the inner surface of the front cover 3 is brought into close contact with the surface of the peripheral edge portion 21 of the front opening of the lamp body 2, and both of them are welded and integrated in this close contact region.

このような溶着を行なうために、特許文献１では、ランプボディと正面カバーとを密着させた面部に対してレーザ光を照射し、レーザ光のエネルギを利用してこれらの面部を溶融させ、ランプボディと正面カバーを溶着させている。この場合、特許文献１のように、正面カバーの正面側からレーザ光を照射し、当該レーザ光を透明な正面カバーを透過させて溶着する面部（以下、溶着面部と称する）に対してレーザ光を投射する手法がとられている。   In order to perform such welding, in Patent Document 1, laser light is irradiated to the surface portion where the lamp body and the front cover are in close contact, and the surface portion is melted using the energy of the laser light. The body and front cover are welded together. In this case, as in Patent Document 1, laser light is applied to a surface portion (hereinafter referred to as a welding surface portion) on which laser light is irradiated from the front side of the front cover, and the laser light is transmitted through the transparent front cover. The method of projecting is taken.

特開２０１１−２５５６２８号公報JP 2011-255628 A

近年のランプは、ランプ外観上の見栄え向上を目的として、正面カバーの一部、特に周縁部を黒色あるいは車体色に着色することが行なわれている。すなわち、ランプボディと正面カバーを溶着した溶着面部が透明な正面カバーを透して外部に露見されることがあるため、この溶着面部に対向する正面カバーの一部領域を、透光率を低くした低透光率として、例えば顔料を含有させて着色した着色領域として構成することによって当該溶着面部が外部に露見されないようにしている。   In recent lamps, for the purpose of improving the appearance of the lamp appearance, a part of the front cover, in particular, the peripheral edge is colored black or a vehicle body color. That is, since the welded surface portion where the lamp body and the front cover are welded may be exposed to the outside through the transparent front cover, a partial area of the front cover facing the welded surface portion is reduced in light transmittance. As the low transmissivity, for example, the welded surface portion is not exposed to the outside by being configured as a colored region colored by containing a pigment.

しかしながら、正面カバーの溶着面部に対向する領域を着色すると、ランプボディと正面カバーとの溶着時に、溶着面部に向けて照射したレーザ光が、着色した領域に含有されている着色用顔料によって光吸収を受けてレーザ光のエネルギが低下され、好適な溶着が行なわれなくなる。特に、黒色に着色する場合には顔料としてカーボンブラックを用いるため、レーザ光エネルギの吸収が顕著であり、溶着が不可能になることもある。   However, if the area facing the welding surface part of the front cover is colored, the laser light irradiated toward the welding surface part is absorbed by the coloring pigment contained in the colored area when the lamp body and the front cover are welded. As a result, the energy of the laser beam is reduced, and suitable welding cannot be performed. In particular, when carbon black is used, carbon black is used as a pigment, so that absorption of laser light energy is remarkable and welding may be impossible.

本発明の目的は、溶着面部の露見を防止することが可能な着色領域等の低透光領域を備える部材をレーザ光により溶着することを可能にしたレーザ溶着構造体を提供するものである。   SUMMARY OF THE INVENTION An object of the present invention is to provide a laser welding structure capable of welding a member having a low light-transmitting region such as a colored region that can prevent exposure of a welded surface portion by laser light.

本発明は、第１の樹脂部材と、一部に透光率の低い低透光領域を一体に有する透光性のある第２の樹脂部材とをレーザ溶着した構造であって、第１の樹脂部材と第２の樹脂部材を溶着した溶着面部が低透光領域の背後に配置され、第２の樹脂部材は低透光領域以外の領域に照射されたレーザ光を当該溶着面部にまで導光する溶着脚を一体に備えている。   The present invention is a structure in which a first resin member and a light-transmitting second resin member integrally having a low light-transmitting region with a low light transmittance are partly welded to each other. A welding surface portion where the resin member and the second resin member are welded is disposed behind the low light transmission region, and the second resin member guides the laser light irradiated to the region other than the low light transmission region to the welding surface portion. It has an integrated weld leg that shines.

本発明において、溶着脚は、一部の面部において溶着面部に当接され、当該溶着面部にまで導光されたレーザ光により当該面部において溶着される構成とされる。   In the present invention, the welding leg is in contact with the welding surface portion at a part of the surface portion, and is welded to the surface portion by the laser light guided to the welding surface portion.

本発明のレーザ溶着構造体は、例えば、ランプボディと正面カバーで構成されるランプハウジングとして構成され、第１の樹脂部材は正面が開口されたランプボディであり、第２の樹脂部材は周縁部が当該ランプボディの開口縁部に溶着される正面カバーとして構成される。   The laser welding structure of the present invention is configured as a lamp housing including, for example, a lamp body and a front cover, the first resin member is a lamp body whose front is opened, and the second resin member is a peripheral portion. Is configured as a front cover welded to the opening edge of the lamp body.

本発明によれば、第２の樹脂部材に照射されたレーザ光は、溶着脚を透して溶着面部にまで導光され、溶着面部において第１の樹脂部材と第２の樹脂部材が溶着される。そのため、溶着面部が第２の樹脂部材を通して外部に露見されないように、溶着面部が第２の樹脂部材の低透光領域の背後に配置されている場合でも、レーザ光は溶着面部にまで導光されて好適な溶着が実現される。   According to the present invention, the laser beam applied to the second resin member is guided to the welding surface portion through the welding leg, and the first resin member and the second resin member are welded to the welding surface portion. The Therefore, even when the welding surface portion is disposed behind the low light-transmissive region of the second resin member so that the welding surface portion is not exposed to the outside through the second resin member, the laser light is guided to the welding surface portion. Thus, suitable welding is realized.

本発明を適用したリアコンビネーションランプの正面図とＢ−Ｂ線断面図。The front view and BB sectional view of the rear combination lamp to which this invention is applied. 実施形態１〜３の図１（ｂ）のＡ部を上下左右反転した拡大断面図。The expanded sectional view which reversed the A section of Drawing 1 (b) of Embodiments 1-3 up and down and right and left. 実施形態１〜３の構造を溶着する溶着装置の概略構成図。The schematic block diagram of the welding apparatus which welds the structure of Embodiment 1-3. 異なる溶着装置の概略構成図。The schematic block diagram of a different welding apparatus. 実施形態４，５の図２と同様の拡大断面図。The expanded sectional view similar to FIG. 2 of Embodiment 4,5. リアコンビネーションランプの変形例の正面図。The front view of the modification of a rear combination lamp.

次に、本発明の実施の形態について図面を参照して説明する。図１（ａ）は本発明のレーザ溶着構造体を自動車の右側リアコンビネーションランプに適用した実施形態の一部を破断した正面図、図１（ｂ）はそのＢ−Ｂ線断面図である。この自動車用のリアコンビネーションランプは、ランプボディ２と正面カバー３とでランプハウジング１が形成されている。このランプハウジング１には、テールランプ、ストップランプ、ターンシグナルランプあるいはバックアップランプとして機能させるための複数のＬＥＤ（発光ダイオード）ユニット４が内装されている。これらＬＥＤユニット４は公知のものを用いているので、ここでは詳細な説明は省略する。   Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a front view of a part of an embodiment in which the laser welding structure of the present invention is applied to a right rear combination lamp of an automobile, and FIG. 1B is a sectional view taken along the line BB in FIG. In this rear combination lamp for an automobile, a lamp housing 1 is formed by a lamp body 2 and a front cover 3. The lamp housing 1 includes a plurality of LED (light emitting diode) units 4 for functioning as a tail lamp, a stop lamp, a turn signal lamp, or a backup lamp. Since these LED units 4 are known ones, detailed description thereof is omitted here.

前記ランプボディ２は本発明の第１の樹脂部材に相当するものであり、正面を開口した容器状に形成されており、その開口の周縁部２１の表面が溶着面部２ａとして構成されている。この溶着面部２ａはカーボンブラック等の光吸収性のある材料が含有され、加熱されたときに溶融可能な樹脂で構成されている。この実施形態ではランプボディ２の全体にカーボンブラックを含有させており、このようなランプボディ２は、例えば、カーボンブラックを含有させた樹脂を金型成形によって成形することにより形成することができる。   The lamp body 2 corresponds to the first resin member of the present invention, and is formed in a container shape having an open front surface. The surface of the peripheral edge portion 21 of the opening is configured as a welding surface portion 2a. The welding surface portion 2a contains a light-absorbing material such as carbon black and is made of a resin that can be melted when heated. In this embodiment, the entire lamp body 2 contains carbon black. Such a lamp body 2 can be formed, for example, by molding a resin containing carbon black by molding.

前記正面カバー３は本発明の第２の樹脂部材に相当するものであり、アウターレンズとも称されるが、透光性を有し、かつ加熱されたときに溶融可能な樹脂で形成されている。この正面カバー３は、中央領域が前記ＬＥＤユニット４から出射された光を透過させるために透光率の高い透光領域３ａとして構成される。また、この透光領域３ａの周囲を囲む領域、換言すれば前記ランプボディ２の溶着面部２ａに沿った周縁領域が所定の色で着色された着色領域３ｂとして構成されている。ここでは、前記正面カバー３は、無色透明な透光樹脂と、カーボンブラックが含有されて黒色に着色された不透光樹脂とを用いた二色成形法（多色成形法）によって形成された二色成形品として構成されている。   The front cover 3 corresponds to the second resin member of the present invention, and is also referred to as an outer lens, but is formed of a resin that is translucent and meltable when heated. . The front cover 3 is configured as a light transmissive region 3 a having a high light transmittance so that the central region transmits the light emitted from the LED unit 4. A region surrounding the translucent region 3a, in other words, a peripheral region along the welding surface portion 2a of the lamp body 2, is configured as a colored region 3b colored with a predetermined color. Here, the front cover 3 is formed by a two-color molding method (multicolor molding method) using a colorless and transparent translucent resin and an opaque translucent resin containing carbon black and colored black. It is configured as a two-color molded product.

このように、前記正面カバー３は中央領域が透光領域３ａであり、その周縁が黒色に着色された着色領域３ｂとして形成されている。特に、この着色領域３ｂは透光率が透光領域３ａに比較して顕著に低くされており、正面カバー３を正面側から見たときに後面側を透視することができず、あるいは透視し難くされている。そのため、正面カバー３を透して前記溶着面部２ａを視認することができず、外部に露見されないようになっている。なお、以後は、前記正面カバー３の周縁の着色領域３ｂについては低透光領域とも称する。   Thus, the front cover 3 is formed as a colored region 3b in which the central region is the translucent region 3a and the periphery thereof is colored black. In particular, the colored region 3b has a light transmittance that is significantly lower than that of the light transmitting region 3a, and the rear surface side cannot be seen through or seen through when the front cover 3 is viewed from the front side. It has been made difficult. Therefore, the welding surface portion 2a cannot be seen through the front cover 3 and is not exposed to the outside. Hereinafter, the colored region 3b at the periphery of the front cover 3 is also referred to as a low light-transmitting region.

図２（ａ）は図１（ｂ）のＡ部を上下および左右に反転させた拡大断面図であり、本発明のレーザ溶着構造体の実施形態１を示している。前記正面カバー３の透光領域３ａには、正面カバー３の後面からランプボディ２の方向に向けて突出された溶着脚３１が一体に形成されている。すなわち、正面カバー３を二色成形したときに、溶着脚３１は透光領域３ａを構成している透明な透光樹脂と一体に成形されている。   FIG. 2A is an enlarged cross-sectional view obtained by inverting the A portion of FIG. 1B vertically and horizontally, and shows Embodiment 1 of the laser welding structure of the present invention. In the translucent area 3 a of the front cover 3, a welding leg 31 is integrally formed so as to protrude from the rear surface of the front cover 3 toward the lamp body 2. That is, when the front cover 3 is molded in two colors, the welding leg 31 is molded integrally with the transparent translucent resin constituting the translucent region 3a.

この溶着脚３１は透光領域３ａの一部、特に低透光領域３ｂの内周側に沿った部位から斜め外側に向けて所定の角度θで傾斜した状態で直線的に突出され、その先端面３１ａが前記低透光領域３ｂの背後に位置されている。また、当該溶着脚３１の先端面３１ａは前記ランプボディ２の溶着面部２ａの表面に密着されるように平坦面に形成されている。この溶着脚３１は、正面カバー３を正面方向から見たときには、前記低透光領域３ｂの内周に沿って無端状に近い形状に延長されている。   This welding leg 31 protrudes linearly in a state inclined at a predetermined angle θ from a part along the inner peripheral side of the light-transmitting region 3a, in particular, from the portion along the inner peripheral side of the low-light-transmitting region 3b. The surface 31a is located behind the low light transmission region 3b. Further, the front end surface 31a of the welding leg 31 is formed as a flat surface so as to be in close contact with the surface of the welding surface portion 2a of the lamp body 2. When the front cover 3 is viewed from the front direction, the welding leg 31 is extended to a shape close to an endless shape along the inner periphery of the low light transmission region 3b.

以上の構成のランプボディ２と正面カバー３の溶着方法について説明する。図３はランプボディ２と正面カバー３を溶着するための溶着装置１００の概略構成図である。レーザ光源１０１から出射されたレーザ光Ｌをガルバノミラー等の光偏向手段により任意方向に向けて偏向して照射する光偏向部１０２を備える。また、この溶着装置１００は溶着するランプボディ２を載置するワーク台１０３と、このワーク台１０３に載置したランプボディ２上に載置された正面カバー３をランプボディ２側に向けて押圧する押え板１０４を備えている。   A method of welding the lamp body 2 and the front cover 3 having the above configuration will be described. FIG. 3 is a schematic configuration diagram of a welding apparatus 100 for welding the lamp body 2 and the front cover 3. A light deflection unit 102 is provided that deflects and emits laser light L emitted from the laser light source 101 in an arbitrary direction by a light deflection unit such as a galvano mirror. Further, the welding apparatus 100 presses the work base 103 on which the lamp body 2 to be welded is placed and the front cover 3 placed on the lamp body 2 placed on the work base 103 toward the lamp body 2 side. A presser plate 104 is provided.

そして、正面開口を上方に向けた状態でランプボディ２をワーク台１０３に載置し、その上から正面カバー３を載置する。ランプボディ２と正面カバー３を位置決めすることにより、正面カバー３の溶着脚３１の先端面３１ａはランプボディ２の周縁部２１の表面、すなわち溶着面部２ａに当接される。そして、押え板１０４によって正面カバー３を下方に押圧することにより、溶着脚３１の先端面３１ａと溶着面部２ａは密接状態とされる。   Then, the lamp body 2 is placed on the work table 103 with the front opening facing upward, and the front cover 3 is placed thereon. By positioning the lamp body 2 and the front cover 3, the front end surface 31a of the welding leg 31 of the front cover 3 is brought into contact with the surface of the peripheral edge portion 21 of the lamp body 2, that is, the welding surface portion 2a. And the front end surface 31a and the welding surface part 2a of the welding leg 31 are made into a close | contact state by pressing the front cover 3 downward by the holding plate 104. FIG.

しかる上で、レーザ光源１０１を駆動し、光偏向部１０２において偏向制御したレーザ光Ｌを正面カバー３に対して照射し、かつ正面カバー３の周縁に沿うように走査する。このレーザ光Ｌの照射により、図２（ａ）に示したように、照射されたレーザ光Ｌは、透光領域３ａのうち、低透光領域３ｂの内周に沿った領域の正面に入射され、当該透光領域３ａを厚み方向に透過された後、溶着脚３１内にまで導光される。さらに溶着脚３１内を導光されて透過され、最終的に溶着脚３１の先端面３１ａとランプボディ２の溶着面部２ａが密着されている領域に投射される。   Then, the laser light source 101 is driven, the laser light L controlled to be deflected by the light deflecting unit 102 is irradiated onto the front cover 3, and scanning is performed along the periphery of the front cover 3. As shown in FIG. 2A, the irradiated laser light L is incident on the front surface of the light transmitting region 3a along the inner periphery of the low light transmitting region 3b. Then, after being transmitted through the translucent region 3 a in the thickness direction, the light is guided into the welding leg 31. Further, the light is guided and transmitted through the welding leg 31 and finally projected onto the region where the tip surface 31a of the welding leg 31 and the welding surface 2a of the lamp body 2 are in close contact with each other.

このレーザ光Ｌの投射により、ランプボディ２は含有されているカーボンブラックがレーザ光Ｌを吸収して発熱し、この熱により溶着面部２ａが溶融される。また、この発熱により正面カバー３の溶着脚３１の先端面３１ａも溶融されるため、溶着脚３１の先端面３１ａと溶着面部２ａが溶着される。これにより、ランプボディ２と正面カバー３の溶着が行なわれ、ヘッドランプハウジング１が製造される。   Due to the projection of the laser beam L, the carbon black contained in the lamp body 2 absorbs the laser beam L and generates heat, and the welding surface portion 2a is melted by this heat. Moreover, since the front end surface 31a of the welding leg 31 of the front cover 3 is melted by this heat generation, the front end surface 31a of the welding leg 31 and the welding surface portion 2a are welded. Thereby, the lamp body 2 and the front cover 3 are welded, and the headlamp housing 1 is manufactured.

このようにして溶着されたランプハウジング１では、前記したように溶着脚３１の先端面３１ａ、換言すればランプボディ２の溶着面部２ａは、正面カバー３の低透光領域３ｂの背後に位置されている。したがって、溶着面部２ａは低透光領域３ｂにより覆い隠される状態となり、ランプを正面方向から観察したとき、すなわち正面カバー３を正面方向から観察したときには、溶着面部２ａが露見されることはなく、ランプの外観上の見栄えが向上する。   In the lamp housing 1 thus welded, as described above, the front end surface 31 a of the welding leg 31, in other words, the welding surface portion 2 a of the lamp body 2 is positioned behind the low light-transmissive region 3 b of the front cover 3. ing. Therefore, the welding surface portion 2a is covered with the low light transmission region 3b, and when the lamp is observed from the front direction, that is, when the front cover 3 is observed from the front direction, the welding surface portion 2a is not exposed, The appearance of the lamp is improved.

また、このランプハウジング１では、溶着時には正面カバー３の透光領域３ａにレーザ光Ｌを照射しており、照射されたレーザ光Ｌは正面カバー３を厚み方向に透過された後に溶着脚３１の内部を透過される。このとき、溶着脚３１が斜め外側に傾斜して突出されている角度を所定の角度θに設定しておくことにより、透過されるレーザ光Ｌは溶着脚３１の内部を直線的に導光され、あるいは一部のレーザ光は溶着脚３１の側面で内部反射（全反射）しながら溶着脚３１の先端面、すなわち溶着面部２ａにまで導光される。これにより、照射されたレーザ光Ｌは正面カバー３によって吸収あるいは減衰されることはなく、高い効率で溶着面部２ａに投射されることになり、溶着を好適に行なうことができる。   Further, in the lamp housing 1, the laser beam L is irradiated to the light transmitting region 3 a of the front cover 3 at the time of welding, and the irradiated laser beam L is transmitted through the front cover 3 in the thickness direction and then the welding leg 31 is irradiated. Transparent inside. At this time, by setting the angle at which the welding leg 31 is inclined and protrudes obliquely outward to a predetermined angle θ, the transmitted laser light L is guided linearly through the inside of the welding leg 31. Alternatively, part of the laser light is guided to the front end surface of the welding leg 31, that is, the welding surface portion 2 a while being internally reflected (totally reflected) on the side surface of the welding leg 31. Thereby, the irradiated laser light L is not absorbed or attenuated by the front cover 3, but is projected onto the welding surface portion 2a with high efficiency, so that the welding can be suitably performed.

この実施形態１では、溶着面部２ａが露見されることがないように当該溶着面部２ａが正面カバー３の低透光領域３ｂの背後に配置されていても、溶着装置１００から出射されるレーザ光Ｌを溶着脚３１によって溶着面部２ａにまで導光することができる。これにより、レーザ光Ｌを溶着面部２ａに対して好適に投射することが可能になり、良好な溶着が実現できる。なお、前記した溶着脚３１の所定の角度θを正面カバー３における臨界角以上になるように設定しておけば、溶着面部２ａから溶着脚３１を透過して正面カバー３に向けられた光は正面カバー３の正面において全反射されるため、溶着面部２ａが正面カバー３の透光領域３ａを通して外部に露見されることも防止される。   In the first embodiment, the laser beam emitted from the welding apparatus 100 even if the welding surface portion 2a is disposed behind the low light-transmissive region 3b of the front cover 3 so that the welding surface portion 2a is not exposed. L can be guided to the welding surface portion 2 a by the welding legs 31. As a result, the laser beam L can be suitably projected onto the welding surface portion 2a, and good welding can be realized. If the predetermined angle θ of the welding leg 31 is set to be equal to or larger than the critical angle in the front cover 3, the light transmitted from the welding surface portion 2a through the welding leg 31 to the front cover 3 is Since it is totally reflected on the front surface of the front cover 3, it is possible to prevent the welded surface portion 2 a from being exposed to the outside through the light transmitting region 3 a of the front cover 3.

図２（ｂ）は前記した溶着脚の形態を相違させた実施形態２の断面図であり、図２（ａ）と同様の断面図である。前記実施形態１は、レーザ光の投射効率を高めるために、溶着脚３１を透光領域３ａから溶着面部２ａまで直線状に斜めに延長した構成であるので、その先端面３１ａおよび溶着面部２ａは低透光領域３ｂの内縁に近い位置に配置せざるを得ない。そのため、状況によっては溶着面部２ａの一部が正面カバー３の透光領域３ａから露見されるおそれがある。   FIG. 2B is a cross-sectional view of the second embodiment in which the form of the above-described welding leg is different, and is a cross-sectional view similar to FIG. In the first embodiment, the welding leg 31 is linearly and obliquely extended from the translucent region 3a to the welding surface portion 2a in order to increase the laser beam projection efficiency. Therefore, the tip surface 31a and the welding surface portion 2a are It must be arranged at a position close to the inner edge of the low light transmission region 3b. For this reason, depending on the situation, a part of the welding surface portion 2 a may be exposed from the translucent region 3 a of the front cover 3.

この実施形態２では、溶着脚３２を平行四辺形に形成し、対をなす斜面部の一方３２ａを正面カバー３の透光領域３ａに対向配置し、他方の斜面部３２ｂを溶着面部２ａに対向配置した構成としている。前記各斜面部３２ａ，３２ｂの傾斜角度は、それぞれ溶着脚３２の内部を導光されるレーザ光が斜面部３２ａ，３２ｂにおいて全反射される角度に設定されている。溶着面部２ａが正面カバー３の低透光領域３ｂの背後に配置されて当該低透光領域３ｂによって覆い隠されることは実施形態１と同じである。また、前記溶着脚３２の底面部の一部、特に前記他方の斜面部３２ｂに近い面部３２ｃが溶着面部２ａに密接されている。   In the second embodiment, the welding legs 32 are formed in a parallelogram, and one of the paired inclined surface portions 32a is disposed opposite to the light transmitting region 3a of the front cover 3, and the other inclined surface portion 32b is opposed to the welding surface portion 2a. The arrangement is arranged. The inclination angle of each of the slope portions 32a and 32b is set to an angle at which the laser light guided inside the welding leg 32 is totally reflected by the slope portions 32a and 32b. The welding surface portion 2a is arranged behind the low light-transmissive region 3b of the front cover 3 and is covered with the low light-transmissive region 3b as in the first embodiment. Further, a part of the bottom surface portion of the welding leg 32, particularly a surface portion 32c close to the other inclined surface portion 32b, is in close contact with the welding surface portion 2a.

この実施形態２によれば、図３に示した溶着装置１００のレーザ光源１０１から出射されたレーザ光Ｌは、正面カバー３の透光領域３ａから溶着脚３２に入射され、一方の斜面部３２ａにおいて全反射されて、正面カバー３の外周方向に偏向される。偏向されたレーザ光Ｌは他方の斜面部３２ｂにおいて全反射され、底面部３２ｃに向けて偏向された後、溶着面部２ａに投射される。このレーザ光Ｌの投射により溶着面部２ａでの溶着が行なわれ、正面カバー３がランプボディ２に溶着されることは実施形態１と同じである。   According to the second embodiment, the laser light L emitted from the laser light source 101 of the welding apparatus 100 shown in FIG. 3 is incident on the welding leg 32 from the translucent region 3a of the front cover 3, and one inclined surface portion 32a. Is totally reflected and deflected in the outer peripheral direction of the front cover 3. The deflected laser light L is totally reflected at the other inclined surface portion 32b, deflected toward the bottom surface portion 32c, and then projected onto the welding surface portion 2a. As in the first embodiment, the laser beam L is welded on the welding surface portion 2a and the front cover 3 is welded to the lamp body 2.

実施形態２においても、溶着面部２ａは正面カバー３の低透光領域３ｂの背後に位置されているので、ランプを正面方向から観察したときには、溶着面部２ａが正面カバー３を通して露見されることはなく、外観上の見栄えが向上する。また、溶着時に正面カバー３に照射されたレーザ光Ｌは正面カバー３によって吸収あるいは減衰されることなく高い効率で溶着面部２ａに投射されるので、溶着を好適に行なうことができる。   Also in the second embodiment, since the welding surface portion 2a is located behind the low light-transmissive region 3b of the front cover 3, the welding surface portion 2a is exposed through the front cover 3 when the lamp is observed from the front direction. And appearance is improved. Further, since the laser light L applied to the front cover 3 at the time of welding is projected onto the welding surface portion 2a with high efficiency without being absorbed or attenuated by the front cover 3, welding can be suitably performed.

図２（ｃ）は実施形態３の溶着脚３３の断面図である。実施形態１，２は溶着面部２ａが正面カバー３の正面とほぼ平行な方向に向けられているため、溶着面部２ａの面積の大きさによっては、ランプの前方から観察したときに溶着面部２ａの一部が露見され易くなる。この実施形態３では、溶着面部２ａを正面カバー３の正面に対してほぼ直角な方向に向けており、これによりランプを前方から観察したときの溶着面部２ａの見かけ上の面積が低減され、溶着面部２ａが露見し難くされている。   FIG. 2C is a cross-sectional view of the welding leg 33 according to the third embodiment. In the first and second embodiments, the welding surface portion 2a is oriented in a direction substantially parallel to the front surface of the front cover 3, so that depending on the size of the area of the welding surface portion 2a, when the welding surface portion 2a is observed from the front of the lamp, Some of them are easily exposed. In the third embodiment, the welding surface portion 2a is oriented in a direction substantially perpendicular to the front surface of the front cover 3, thereby reducing the apparent area of the welding surface portion 2a when the lamp is observed from the front. The surface portion 2a is hardly exposed.

実施形態３は、ランプボディ２の周縁部２１の内周面の一部に正面カバー３の溶着脚３３の外周面を密接させ、この密接した領域を溶着面部２ａとして構成している。これを実現するために実施形態３では、溶着脚３３を台形に形成し、斜面部３３ａを正面カバー３の透光領域３ａに対向配置し、垂直面部３３ｂをランプボディ３の周縁部２１の溶着面部２ａとしての内周面に密接させている。溶着面部２ａが正面カバー３の低透光領域３ｂの背後に配置され、溶着面部２ａが低透光領域３ｂによって覆い隠されることは実施形態１，２と同じである。   In the third embodiment, the outer peripheral surface of the welding leg 33 of the front cover 3 is brought into close contact with a part of the inner peripheral surface of the peripheral edge portion 21 of the lamp body 2, and this intimate region is configured as the welding surface portion 2a. In order to achieve this, in the third embodiment, the welding legs 33 are formed in a trapezoidal shape, the inclined surface portion 33a is disposed opposite to the light transmitting region 3a of the front cover 3, and the vertical surface portion 33b is welded to the peripheral edge portion 21 of the lamp body 3. The surface portion 2a is in close contact with the inner peripheral surface. The welding surface portion 2a is disposed behind the low light-transmissive region 3b of the front cover 3, and the welding surface portion 2a is covered with the low light-transmissive region 3b as in the first and second embodiments.

実施形態３によれば、溶着装置１００のレーザ光源１０１から出射されたレーザ光Ｌは、正面カバー３の透光領域３ａから溶着脚３３に入射され、斜面部３３ａにおいて全反射されて、正面カバー３の外周方向に偏向される。偏向されたレーザ光は垂直面部３３ｂ、すなわち溶着面部２ａに投射され、溶着が行なわれる。   According to the third embodiment, the laser light L emitted from the laser light source 101 of the welding apparatus 100 is incident on the welding leg 33 from the translucent region 3a of the front cover 3, and is totally reflected by the inclined surface portion 33a. 3 is deflected in the outer peripheral direction. The deflected laser light is projected onto the vertical surface portion 33b, that is, the welding surface portion 2a, and welding is performed.

実施形態３においても、溶着面部２ａは正面カバー３の低透光領域３ｂの背後に位置されているので、ランプを正面方向から観察したときには、溶着面部２ａが露見されることはなく、外観上の見栄えが向上する。特に、溶着面部２ａは正面カバー３の正面に対してほぼ直角な方向に向けられているので、ランプの前方から観察したときの溶着面部２ａの見かけ上の面積が低減され、溶着面部２ａはさらに露見され難くなっている。また、溶着時に正面カバー３に照射されたレーザ光Ｌは正面カバー３によって吸収あるいは減衰されることなく高い効率で溶着面部２ａに投射され溶着を好適に行なうことができる。   Also in the third embodiment, since the welding surface portion 2a is located behind the low light transmission region 3b of the front cover 3, the welding surface portion 2a is not exposed when the lamp is observed from the front direction. The appearance of is improved. In particular, since the welding surface portion 2a is oriented in a direction substantially perpendicular to the front surface of the front cover 3, the apparent area of the welding surface portion 2a when observed from the front of the lamp is reduced, and the welding surface portion 2a is further reduced. It is hard to be exposed. Further, the laser beam L applied to the front cover 3 at the time of welding can be projected onto the welding surface portion 2a with high efficiency without being absorbed or attenuated by the front cover 3, so that welding can be suitably performed.

実施形態１，２，３は、図３に示した溶着装置１００のレーザ光源１０１および光偏向部１０２から出射されたレーザ光を正面カバー３の正面に照射しているが、図４に示す溶着装置１００Ａのように、走査されるレーザ光Ｌをワーク台１０３の周囲から中央方向に向けて反射する反射ミラー１０５を配設し、照射されたレーザ光Ｌを当該反射ミラー１０５で反射してランプボディ２の外周面側から溶着面部２ａに投射するように構成してもよい。あるいは図示は省略するが、レーザ光源１０１をワーク台１０３の周囲を移動させながらレーザ光Ｌを投射するように構成してもよい。   In the first, second, and third embodiments, the laser light emitted from the laser light source 101 and the light deflection unit 102 of the welding apparatus 100 shown in FIG. 3 is irradiated on the front surface of the front cover 3, but the welding shown in FIG. As in the apparatus 100A, a reflection mirror 105 that reflects the scanned laser beam L from the periphery of the work table 103 toward the center is disposed, and the irradiated laser beam L is reflected by the reflection mirror 105 to be a lamp. You may comprise so that it may project on the welding surface part 2a from the outer peripheral surface side of the body 2. FIG. Or although illustration is abbreviate | omitted, you may comprise so that the laser beam L may be projected, moving the laser light source 101 around the workpiece base 103. FIG.

図5（ａ）はこのように構成された溶着装置１００Ａを用いて溶着を行なうランプに適用可能な実施形態４の断面図である。実施形態４は、ランプボディ２の周縁部２１の外周面の一部に正面カバー３の溶着脚３４の内側の側面３４ａを密接させ、この密接した領域を溶着面部２ａとして構成している。これを実現するために、正面カバー３の低透光領域３ｂの内面に透光性の樹脂からなる断面形状が矩形をした溶着脚３４を突出形成し、この溶着脚３４の内側の側面３４ａを溶着面部２ａとしてのランプボディ２の周縁部２１の外周面に密接させている。溶着面部２ａが正面カバー３の低透光領域３ｂの背後に配置され、低透光領域３ｂによって覆い隠されることは実施形態１〜３と同じである。   FIG. 5A is a cross-sectional view of a fourth embodiment applicable to a lamp that performs welding using the welding apparatus 100A configured as described above. In the fourth embodiment, the inner side surface 34a of the welding leg 34 of the front cover 3 is brought into intimate contact with a part of the outer peripheral surface of the peripheral edge 21 of the lamp body 2, and this intimate region is configured as the welding surface portion 2a. In order to realize this, a welding leg 34 having a rectangular cross-sectional shape made of a translucent resin is formed on the inner surface of the low-light-transmitting region 3b of the front cover 3 so that the side surface 34a on the inner side of the welding leg 34 is formed. It is made to contact | adhere to the outer peripheral surface of the peripheral part 21 of the lamp body 2 as the welding surface part 2a. The welding surface portion 2a is disposed behind the low light transmissive region 3b of the front cover 3 and is covered with the low light transmissive region 3b as in the first to third embodiments.

実施形態４によれば、溶着装置１００Ａのレーザ光源１０１から出射されたレーザ光Ｌは反射ミラー１０５で反射され、ランプボディ２の側方から溶着脚３４の外周面に入射され、溶着脚３４を厚み方向に透過されて溶着面部２ａに投射され溶着が行なわれる。レーザ光Ｌは正面カバー３に照射されることはなく、したがって正面カバー３での吸収あるいは減衰が生じることはない。特に、正面カバー３の低透光領域３ｂにおいて吸収あるいは減衰されることは全くないので、高い効率で溶着面部２ａに投射され溶着を好適に行なうことができる。   According to the fourth embodiment, the laser light L emitted from the laser light source 101 of the welding apparatus 100 </ b> A is reflected by the reflection mirror 105 and is incident on the outer peripheral surface of the welding leg 34 from the side of the lamp body 2. It is transmitted in the thickness direction and projected onto the welding surface portion 2a to perform welding. The laser light L is not applied to the front cover 3, and therefore absorption or attenuation at the front cover 3 does not occur. In particular, since it is not absorbed or attenuated at all in the low light-transmitting region 3b of the front cover 3, it can be projected onto the welding surface portion 2a with high efficiency and can be favorably performed.

実施形態４においても、溶着面部２ａは正面カバー３の低透光領域３ｂの背後に位置されているので、ランプを正面方向から観察したときには、溶着面部２ａが露見されることはなく、外観上の見栄えが向上する。さらに、溶着面部２ａは正面カバー３の正面に対してほぼ直角な方向に向けられているので、ランプの前方から観察したときの溶着面部２ａの見かけ上の面積が低減され、さらに露見し難くなっている。   Also in the fourth embodiment, since the welding surface portion 2a is located behind the low light transmission region 3b of the front cover 3, the welding surface portion 2a is not exposed when the lamp is observed from the front direction. The appearance of is improved. Furthermore, since the welding surface portion 2a is oriented in a direction substantially perpendicular to the front surface of the front cover 3, the apparent area of the welding surface portion 2a when viewed from the front of the lamp is reduced, and it is difficult to expose. ing.

図５（ｂ）は実施形態４と同様に、図４に示した溶着装置１００Ａを用いて溶着を行なう実施形態５の断面図である。実施形態５は、実施形態４と同様に正面カバー３の低透光領域３ｂの内面に透光性の樹脂からなる溶着脚３５を突出形成しており、この溶着脚３５の外周面３５ａはほぼ垂直面として形成され、内周面は内側に向けて傾斜された斜面部３５ｂとして形成されている。また、この実施形態５では、実施形態１，２と同様に溶着脚３５が密接されるランプボディ２の周縁部２１の溶着面部２ａは、正面カバー３の正面とほぼ平行な方向に向けられている。溶着面部２ａが正面カバー３の低透光領域３ｂの背後に配置されて覆い隠されることは実施形態１〜４と同じである。   FIG. 5B is a cross-sectional view of the fifth embodiment in which welding is performed using the welding apparatus 100A shown in FIG. In the fifth embodiment, similarly to the fourth embodiment, a welding leg 35 made of a translucent resin is formed on the inner surface of the low-light-transmissive region 3b of the front cover 3, and the outer peripheral surface 35a of the welding leg 35 is substantially the same. It is formed as a vertical surface, and the inner peripheral surface is formed as an inclined surface portion 35b inclined inward. In the fifth embodiment, as in the first and second embodiments, the welding surface portion 2 a of the peripheral edge portion 21 of the lamp body 2 to which the welding legs 35 are in close contact is directed in a direction substantially parallel to the front surface of the front cover 3. Yes. The welding surface portion 2a is arranged behind the low light-transmissive region 3b of the front cover 3 and is obscured as in the first to fourth embodiments.

実施形態５によれば、溶着装置１００Ａのレーザ光源１０１から出射されたレーザ光Ｌは反射ミラー１０５で反射され、ランプボディ２の側方から溶着脚３５の外周面３５ａに入射される。入射されたレーザ光Ｌは溶着脚３５の斜面部３５ｂにおいて反射され、ランプボディ２の周縁部２１に向けられ、溶着面部２ａに投射される。これにより、溶着脚３５とランプボディ２の周縁部２１は溶着面部２ａにおいて溶着が行なわれる。   According to the fifth embodiment, the laser light L emitted from the laser light source 101 of the welding apparatus 100 </ b> A is reflected by the reflection mirror 105 and is incident on the outer peripheral surface 35 a of the welding leg 35 from the side of the lamp body 2. The incident laser light L is reflected by the inclined surface portion 35b of the welding leg 35, directed toward the peripheral edge portion 21 of the lamp body 2, and projected onto the welding surface portion 2a. Thereby, the welding leg 35 and the peripheral part 21 of the lamp body 2 are welded at the welding surface part 2a.

実施形態５においても、実施形態４と同様に、レーザ光Ｌは正面カバー３に照射されることはなく、したがって正面カバー３での吸収あるいは減衰が生じることはない。特に、正面カバー３の低透光領域３ｂにおいて吸収あるいは減衰されることは全くないので、高い効率で溶着面部２ａに投射され、溶着を好適に行なうことができる。また、溶着面部２ａは正面カバー３の低透光領域３ｂの背後に位置されているので、ランプを正面方向から観察したときには、溶着面部２ａが露見されることはなく、外観上の見栄えが向上する。   Also in the fifth embodiment, similarly to the fourth embodiment, the laser beam L is not applied to the front cover 3, and therefore, absorption or attenuation at the front cover 3 does not occur. In particular, since it is not absorbed or attenuated at all in the low light transmission region 3b of the front cover 3, it is projected onto the welding surface portion 2a with high efficiency, and welding can be suitably performed. Moreover, since the welding surface part 2a is located behind the low light transmission area | region 3b of the front cover 3, when the lamp | ramp is observed from a front direction, the welding surface part 2a is not exposed and the appearance on appearance improves. To do.

本発明は以上説明した実施形態の形態に限られるものではなく、溶着脚の形状、構造は適宜に変更することが可能である。特に、正面カバーに形成される低透光領域の形態に対応して溶着面部の構成やサイズ等が相違される場合には、その溶着面部の構成に対応させて溶着脚の形状やサイズを変更することが可能である。   The present invention is not limited to the embodiment described above, and the shape and structure of the welding legs can be changed as appropriate. In particular, when the configuration and size of the welding surface portion is different corresponding to the form of the low light transmission area formed on the front cover, the shape and size of the welding leg is changed according to the configuration of the welding surface portion. Is possible.

例えば、図６に左側のリアコンビネーションランプ１Ａを示すように、リアコンビネーションランプを構成しているテールランプ、ストップランプ、ターンシグナルランプあるいはバックアップランプの各ランプが、自動車のリアパネル２００とリアトランクリッド２１０のそれぞれに分割して配置されている構成のリアコンビネーションランプ１Ａにも適用できる。この場合には、ランプボディはランプボディ２Ａ，２Ｂに分割され、これに対応して正面カバーは正面カバー３Ａ，３Ｂに分割される。各正面カバー３Ａ，３Ｂにはそれぞれ透光領域３ａと低透光領域３ｂが形成される。   For example, as shown in the left rear combination lamp 1A in FIG. 6, the tail lamp, stop lamp, turn signal lamp, or backup lamp constituting the rear combination lamp are arranged on the rear panel 200 and the rear trunk lid 210 of the automobile. The present invention can also be applied to a rear combination lamp 1A having a configuration in which each is divided. In this case, the lamp body is divided into lamp bodies 2A and 2B, and the front cover is divided into front covers 3A and 3B correspondingly. Each front cover 3A, 3B is formed with a light transmissive region 3a and a low light transmissive region 3b, respectively.

このリアコンビネーションランプ１Ａでは、前記正面カバー３Ａ，３Ｂの周縁領域の一部、すなわち分割された境界領域である分割領域Ｓに臨む部位は透光領域として構成してもよい。この分割領域Ｓにおいては、透光領域を利用してレーザ光を照射してレーザ溶着を行なうようにすることも可能である。   In the rear combination lamp 1A, a part of the peripheral area of the front covers 3A and 3B, that is, a part that faces the divided area S that is a divided boundary area may be configured as a translucent area. In this divided area S, it is also possible to perform laser welding by irradiating laser light using a light transmitting area.

実施形態では本発明のレーザ溶着構造体として、自動車のリアコンビネーションランプのランプハウジングに適用した例を示したが、ヘッドランプを含む他の照明用ランプのランプハウジング、特にランプボディに正面カバーを溶着する構造のランプハウジングに適用してもよい。また、ランプボディと正面カバー以外の第１と第２の樹脂部材をレーザ溶着するランプであれば本発明を同様に適用することができる。   In the embodiment, the laser welding structure according to the present invention is applied to a lamp housing of a rear combination lamp of an automobile. However, a front cover is welded to a lamp housing of another lighting lamp including a headlamp, particularly a lamp body. You may apply to the lamp housing of the structure which does. Further, the present invention can be similarly applied to any lamp that laser welds the first and second resin members other than the lamp body and the front cover.

さらに本発明は、第１の樹脂部材と第２の樹脂部材をレーザ溶着する構造であって、溶着面部が第２の樹脂部材の透光領域から露見しないようにすることが要求されるレーザ溶着構造体であれば適用することが可能である。   Further, the present invention is a laser welding structure in which the first resin member and the second resin member are laser-welded, and the welding surface portion is required not to be exposed from the light-transmitting region of the second resin member. Any structure can be applied.

１，１Ａ ランプハウジング（レーザ溶着構造体）
２，２Ａ，２Ｂ ランプボディ（第１の樹脂部材）
２ａ 溶着面部
３，３Ａ，３Ｂ 正面カバー（第２の樹脂部材）
３ａ 透光領域
３ｂ 低透光領域
４ ＬＥＤユニット
２１ 周縁部
３１〜３５ 溶着脚
１００，１００Ａ 溶着装置
１０１ レーザ光源
１０２ 偏向部
１０３ ワーク台
１０４ 押え板
１０５ 反射ミラー
２００ リアパネル
２１０ リアトランクリッド

1,1A lamp housing (laser welded structure)
2,2A, 2B Lamp body (first resin member)
2a Welding surface part 3, 3A, 3B Front cover (second resin member)
3a Light transmissive area 3b Low light transmissive area 4 LED unit 21 Peripheral parts 31 to 35 Welding legs 100, 100A Welding apparatus 101 Laser light source 102 Deflection part 103 Work table 104 Holding plate 105 Reflecting mirror 200 Rear panel 210 Rear trunk lid

Claims (4)

第１の樹脂部材と、一部に透光率の低い低透光領域を一体に有する透光性のある第２の樹脂部材とをレーザ溶着したレーザ溶着構造体であって、前記第１の樹脂部材と前記第２の樹脂部材を溶着した溶着面部が前記低透光領域の背後に配置され、前記第２の樹脂部材は前記低透光領域以外の領域に照射されたレーザ光を当該溶着面部にまで導光する溶着脚を一体に備えていることを特徴とするレーザ溶着構造体。   A laser welded structure obtained by laser welding a first resin member and a light-transmitting second resin member integrally including a low light-transmitting region having a low light transmittance in part. A welding surface portion where the resin member and the second resin member are welded is disposed behind the low light transmissive region, and the second resin member welds the laser light irradiated to the region other than the low light transmissive region. A laser welding structure characterized by integrally including a welding leg that guides light to a surface portion. 前記溶着脚は、一部の面部において前記溶着面部に当接され、当該溶着面部にまで導光されたレーザ光により前記面部において溶着される請求項１に記載のレーザ溶着構造体。   2. The laser welding structure according to claim 1, wherein the welding leg is brought into contact with the welding surface portion at a part of the surface portion, and is welded at the surface portion by laser light guided to the welding surface portion. 前記レーザ溶着構造体はランプボディと正面カバーで構成されるランプハウジングであり、前記第１の樹脂部材は正面が開口されたランプボディであり、前記第２の樹脂部材は当該ランプボディの開口縁部に溶着される正面カバーである請求項１または２に記載のレーザ溶着構造体。   The laser welding structure is a lamp housing composed of a lamp body and a front cover, the first resin member is a lamp body having an open front, and the second resin member is an opening edge of the lamp body. The laser welded structure according to claim 1, wherein the laser welded structure is a front cover welded to the portion. 前記正面カバーは、中央領域がランプ光を透過する透光領域として構成され、当該透光領域を囲む周縁部が着色された着色領域で構成される低透光領域であり、前記溶着面部は当該正面カバーの前記着色領域の背後に配置されている請求項３に記載のレーザ溶着構造体。


The front cover is a low-light-transmitting region in which a central region is configured as a light-transmitting region that transmits lamp light, and a peripheral portion that surrounds the light-transmitting region is colored, and the welding surface portion is The laser welded structure according to claim 3, wherein the laser welded structure is disposed behind the colored region of the front cover.


JP2015093888A 2015-05-01 2015-05-01 Laser deposition structure Pending JP2016213008A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020035313A1 (en) * 2018-08-13 2020-02-20 Volkswagen Aktiengesellschaft Illumination device for a motor vehicle
CN112074689A (en) * 2018-04-25 2020-12-11 株式会社小糸制作所 Vehicle lamp
EP3751192A4 (en) * 2018-02-08 2021-11-24 Ichikoh Industries, Ltd. Outer lens for lighting fixtures for vehicles, lighting fixture for vehicles provided with said outer lens, and method for producing said lighting fixture for vehicles
WO2022176770A1 (en) * 2021-02-17 2022-08-25 株式会社小糸製作所 Lens unit for lighting instrument, member for lighting instrument, and lighting instrument
WO2022176714A1 (en) * 2021-02-22 2022-08-25 スタンレー電気株式会社 Vehicle lamp and lens

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3751192A4 (en) * 2018-02-08 2021-11-24 Ichikoh Industries, Ltd. Outer lens for lighting fixtures for vehicles, lighting fixture for vehicles provided with said outer lens, and method for producing said lighting fixture for vehicles
CN112074689A (en) * 2018-04-25 2020-12-11 株式会社小糸制作所 Vehicle lamp
CN112074689B (en) * 2018-04-25 2022-08-19 株式会社小糸制作所 Vehicle lamp
WO2020035313A1 (en) * 2018-08-13 2020-02-20 Volkswagen Aktiengesellschaft Illumination device for a motor vehicle
WO2022176770A1 (en) * 2021-02-17 2022-08-25 株式会社小糸製作所 Lens unit for lighting instrument, member for lighting instrument, and lighting instrument
WO2022176714A1 (en) * 2021-02-22 2022-08-25 スタンレー電気株式会社 Vehicle lamp and lens

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