WO2020255827A1 - Vehicular lamp and cover for vehicular lamp - Google Patents

Vehicular lamp and cover for vehicular lamp Download PDF

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Publication number
WO2020255827A1
WO2020255827A1 PCT/JP2020/022866 JP2020022866W WO2020255827A1 WO 2020255827 A1 WO2020255827 A1 WO 2020255827A1 JP 2020022866 W JP2020022866 W JP 2020022866W WO 2020255827 A1 WO2020255827 A1 WO 2020255827A1
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WO
WIPO (PCT)
Prior art keywords
cover
welded
lamp housing
design surface
welding
Prior art date
Application number
PCT/JP2020/022866
Other languages
French (fr)
Japanese (ja)
Inventor
昌彦 西崎
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to JP2021528143A priority Critical patent/JP7430185B2/en
Publication of WO2020255827A1 publication Critical patent/WO2020255827A1/en

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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
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • 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
    • B29C66/87—Auxiliary operations or devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/10—Protection of lighting devices

Definitions

  • the present invention relates to a vehicle lighting fixture in which a cover is joined to a lamp housing by hot plate welding and a technical field of a vehicle lighting fixture cover.
  • a lamp housing for a vehicle has a lamp housing having an opening and a cover joined to the lamp housing in a state of closing the opening, and a lamp unit or the like is required inside a lamp housing and a lamp outer housing composed of the cover. Each part of is arranged.
  • a welded surface is formed on the lamp housing, and the cover is provided with a welded leg portion protruding from the outer peripheral side portion of the design surface portion.
  • the design surface portion is a portion where the outer surface faces the outside of the vehicle, the welding leg portion is a portion joined to the welding surface by hot plate welding, and the tip portion of the welding leg portion is joined to the welding surface by melting.
  • the lamp housing and the cover are held by the first jig and the second jig, respectively, and the welded legs and the joint surface are heated by the hot plate so that they can be melted.
  • the cover is pressed against the lamp housing in the crimping direction, and the tip of the welded leg pressed against the welded surface is melted.
  • the crimping direction is the moving direction of the second jig with respect to the first jig.
  • the cover of a vehicle lamp often has a design surface portion curved according to the shape of the vehicle body or the like, and the welded leg portion protrudes from the outer peripheral side portion of the design surface portion. Therefore, the protruding direction of the welded leg from the design surface does not match the crimping direction at the time of joining by hot plate welding.
  • the contact direction between the two is different from the crimping direction at the time of joining by hot plate welding, and the bonding strength of the cover to the lamp housing may decrease.
  • the vehicle lighting fixture of the present invention and the vehicle lighting fixture cover are intended to ensure high bonding strength to the lamp housing of the cover.
  • the vehicle lamp according to the present invention includes a lamp housing having an internal space and a welded surface formed thereof, and a cover covering the internal space, and the cover is joined to the lamp housing by hot plate welding.
  • a vehicle lamp, the cover is provided with a design surface portion whose outer surface faces the outside of the vehicle and a welding leg portion that protrudes from the design surface portion and is welded to the welding surface.
  • the welding leg portion is provided with a welding leg portion.
  • a continuous portion continuous with the design surface portion and a bent portion that is bent toward the outer peripheral side of the design surface portion with respect to the continuous portion and the tip portion is welded to the welded surface are provided.
  • the bent portion is bent with respect to the continuous portion in a direction in which the contact direction between the two when the welded leg is pressed against the welded surface of the lamp housing approaches the crimping direction at the time of joining by hot plate welding.
  • the protruding direction of the continuous portion from the design surface portion is 30 with respect to the crimping direction when the cover is crimped to the lamp housing in hot plate welding. It is desirable to make it larger than the degree.
  • the size of the portion of the design surface portion on the inner peripheral side of the welded leg portion that transmits light becomes large, so that the transmission region of the light cover emitted from the light source becomes large.
  • the boundary portion between the continuous portion and the bent portion is formed as a bent end portion, and the direction connecting the tip portion and the bent end portion in the bent portion is It is desirable that the knotting direction is the same as the crimping direction.
  • the outer peripheral portion of the design surface portion is located outside the welded leg portion.
  • the outer peripheral portion of the design surface portion functions as a shielding portion that shields the welded leg portion, and the joint portion of the welded leg portion with the welded surface is difficult to be visually recognized from the gap between the vehicle body and the cover.
  • the vehicle lamp cover according to the present invention is a vehicle lamp cover that is joined to a lamp housing having an internal space and having a welded surface formed by hot plate welding, and the outer surface is the outside of the vehicle.
  • a design surface portion facing toward the direction and a welded leg portion that protrudes from the design surface portion and is welded to the welded surface are provided, and the welded leg portion has a continuous portion continuous with the design surface portion and a continuous portion with respect to the continuous portion.
  • a bent portion that is bent on the outer peripheral side of the design surface portion and the tip portion is welded to the welded surface is provided.
  • the bent portion is bent with respect to the continuous portion in a direction in which the contact direction between the two when the welded leg is pressed against the welded surface of the lamp housing approaches the crimping direction at the time of joining by hot plate welding.
  • the bending portion when the welding leg portion is pressed against the welding surface of the lamp housing, the bending portion is bent with respect to the continuous portion in a direction in which the contact direction between the two is closer to the crimping direction at the time of joining by hot plate welding. , High bonding strength of the cover to the lamp housing can be ensured.
  • FIGS. 2 to 8 show an embodiment of the vehicle lamp and the cover of the vehicle lamp of the present invention, and this figure is a cross-sectional view showing the vehicle lamp. It is a figure which shows a part of a cover. It is sectional drawing which shows the state which a cover and a lamp housing are heated by a hot plate in hot plate welding. It is sectional drawing which shows the state which the cover is joined to the lamp housing in the hot plate welding. It is a figure which shows the background which came to this invention. It is a figure which shows the example which made the length in the knotting direction of a bent part and the length in a protruding direction from a design surface part of a continuous part substantially the same.
  • the vehicle lamp 1 has a lamp housing 2 and a cover 3, and the cover 3 is joined to the lamp housing 2 by hot plate welding.
  • the front-back, up-down, left-right directions are shown corresponding to the positions where the lamp housing 2 and the cover 3 are held at the time of joining by hot plate welding. Therefore, the side where the cover 3 is located is upward, the side where the lamp housing 2 is located is downward, and the direction in which the outer peripheral portion of the cover 3 is located in the cross-sectional shape shown in each figure is the left-right direction for convenience.
  • front-back, up-down, left-right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.
  • the vehicle lamp 1 is shown in a simple shape that is rotationally symmetric.
  • the vehicle lamp 1 is joined by joining the cover 3 to the lamp housing 2 by hot plate welding, and by crimping the cover 3 to the lamp housing 2 in the hot plate welding. Therefore, the crimping direction S is set in the vertical direction (see FIG. 1).
  • the lamp housing 2 is formed of a resin material such as ABS resin (acrylonitrile copolymer resin) and has an internal space.
  • the lamp housing 2 has a concave main body 4 opened upward, an annular flange portion 5 protruding outward from the upper end portion of the main body 4, and an annular joining protrusion protruding upward from the flange portion 5.
  • the upper surface of the bonding protrusion 6 is formed as a welding surface 6a.
  • the cover 3 is formed of, for example, a transparent resin material such as acrylic, and has a design surface portion 7 having an outer surface 3a facing outward of the vehicle and a welded leg portion 8 protruding from an outer peripheral portion of the inner surface 7a of the design surface portion 7. Are formed integrally.
  • the cover 3 is joined to the lamp housing 2 so as to cover the internal space.
  • the design surface portion 7 is curved so as to be convex on the opposite side of the lamp housing 2 according to the shape of the vehicle body, and is formed in a curved surface shape.
  • a portion of the design surface portion 7 outside the welded leg portion 8 is provided as a shielding portion 9 (see FIGS. 1 and 2).
  • a portion inside the shielding portion 9 which is a portion where the welding leg portion 8 is projected is provided as a protrusion forming portion 10
  • the inner portion of the protrusion forming portion 10 that is, the shielding portion 9 and the protrusion
  • a portion other than the portion forming portion 10 is provided as a light transmitting portion 11.
  • the welded leg portion 8 is composed of a continuous portion 12 continuous with the design surface portion 7 and a bent portion 13 bent with respect to the continuous portion 12.
  • the tip end surface of the bent portion 13 is formed as a joint surface 8a
  • the tip end portion of the bent portion 13 including the joint surface 8a is provided as a joint portion 8b (see FIG. 2).
  • the boundary portion between the continuous portion 12 and the bent portion 13 is formed as a bent end portion 8c.
  • the continuous portion 12 is projected in a direction substantially orthogonal to, for example, a direction in which the shielding portion 9 and the protrusion forming portion 10 are continuous, and the protruding direction P of the continuous portion 12 has an inclination angle ⁇ of 30 degrees with respect to the crimping direction S. It has been made larger.
  • the bent portion 13 is bent toward the outer peripheral side of the design surface portion 7, that is, the shielding portion 9 side with respect to the continuous portion 12.
  • the bending direction Q is the direction in which the bending portion 13 connects the joint portion 8b and the bending end portion 8c.
  • the knotting direction Q of the bent portion 13 coincides with the crimping direction S.
  • the knotting direction Q may be set to a certain angle or less with respect to the crimping direction S, and may be set to, for example, 30 degrees or less with respect to the crimping direction S.
  • the cover 3 When the cover 3 is joined to the lamp housing 2 by hot plate welding, the lamp housing 2 and the cover 3 are held by the first jig 50 and the second jig 60, respectively, and the cover 3 is separated above the lamp housing 2. (See FIG. 3).
  • the heat plate 70 is moved between the lamp housing 2 and the cover 3, and the lamp housing 2 is moved.
  • the joining protrusion 6 and the welding leg 8 of the cover 3 are heated by the hot plate 70.
  • the upper end portion of the bonding protrusion 6 including the welding surface 6a and the bonding portion 8b of the welding leg portion 8 are brought into a meltable state.
  • the hot plate 70 is moved and retracted from between the lamp housing 2 and the cover 3, and the second jig 60 is lowered to press the cover 3 against the lamp housing 2 in the crimping direction S.
  • the joint surface 8a of the welding leg portion 8 is crimped from above to the welding surface 6a of No. 6 (see FIG. 4).
  • the upper end portion of the joining protrusion 6 including the welding surface 6a and the joining portion 8b of the welding leg portion 8 are in a meltable state, the upper end portion of the joining protrusion 6 and the welding leg portion 8 The joint portion 8b is melted, and the cover 3 is joined to the lamp housing 2.
  • the lamp housing 2 and the cover 3 are taken out from the first jig 50 and the second jig 60, respectively, and the joining work of the cover 3 to the lamp housing 2 by hot plate welding is completed.
  • the lamp housing 2 and the cover 3 form the lamp outer housing 14 (see FIG. 1).
  • the inside of the lamp outer casing 14 is formed as a lamp chamber 14a, and a lamp unit (not shown) having necessary parts such as a light source and a reflector is arranged in the lamp chamber 14a to form a vehicle lamp 1.
  • the light emitted from the light source is reflected by, for example, a reflector, transmitted through the light transmitting portion 11 of the cover 3, and is irradiated to the outside.
  • the welded leg portion 8A that protrudes in a direction substantially orthogonal to the design surface portion 7 is provided. If so, the welding leg portion 8A is inclined with respect to the welding surface 6a of the joining protrusion 6 (see FIG. 5 (A)). Therefore, the bonding strength of the cover 3 to the lamp housing 2 may decrease.
  • burr B which is a protruding portion due to melting generated by melting the joint portion 8b and the joining protrusion 6, and the welding leg portion 8B is crimped.
  • the tip of the welded leg portion 8B is positioned close to the vehicle body 100, so that the burr B is easily visible from the gap between the vehicle body 100 and the cover 3.
  • the design surface portion 7 has a wide portion that greatly protrudes outward from the welded leg portion 8B, so that the wide shielding portion 9C itself is covered. There is a risk of reduced visibility. Further, since the overall size of the design surface portion 7 is set to a constant size according to the size and shape of the vehicle body 100, if a large shielding portion 9C is provided, the welded leg portion 8B is provided on the inner circumference accordingly. It becomes necessary to provide it on the side, and the size of the light transmitting portion 11 becomes smaller.
  • the welded leg portion 8 is composed of a continuous portion 12 continuous with the design surface portion 7 and a bent portion 13 bent toward the outer peripheral side of the design surface portion 7 with respect to the continuous portion 12. (See FIG. 5 (D)).
  • the continuous portion 12 and the bent portion 13 as described above are provided, so that the direction in which the welding leg portion 8 is pressed against the welding surface 6a of the lamp housing 2 is due to hot plate welding. Since the bent portion 13 is bent with respect to the continuous portion 12 in the direction approaching the crimping direction S at the time of joining, a high joining strength of the cover 3 to the lamp housing 2 can be ensured.
  • the burr B which is a protruding portion due to melting, is difficult to be visually recognized from the gap between the vehicle body 100 and the cover 3, and the burr B is difficult to be visually recognized. It is not necessary to provide a wide shielding portion 9C for this purpose, and visibility can be improved.
  • the size of the light transmitting portion 11 of the design surface portion 7 is not reduced, and the irradiation region of the light emitted from the light source can be widened.
  • the protruding direction P of the continuous portion 12 from the design surface portion 7 is made larger than 30 degrees with respect to the crimping direction S when the cover 3 is crimped to the lamp housing 2.
  • the size of the light transmitting portion 11 which is a portion on the inner peripheral side of the welded leg portion 8 of the design surface portion 7 becomes large, the transmission region of the light cover 3 emitted from the light source becomes large, and the irradiation region becomes even larger. It can be increased to improve the brightness.
  • the knotting direction Q of the bent portion 13 coincides with the crimping direction S
  • the outer peripheral portion of the design surface portion 7 since the outer peripheral portion of the design surface portion 7 is located outside the welded leg portion 8, the outer peripheral portion of the design surface portion 7 functions as a shielding portion 9 for shielding the welded leg portion 8, and the welded surface of the welded leg portion 8 is provided.
  • the joint portion with 6a is difficult to be visually recognized from the gap between the vehicle body 100 and the cover 3, and visibility can be improved.
  • burrs B generated by welding are generated at equal sizes on the outer peripheral side and the inner peripheral side of the welded leg portion 8. easy. Therefore, it is not necessary to form a groove or a wall in the joining protrusion 6 to prevent excessive protrusion of the burr B, and the welding surface 6a can be formed in a flat shape, so that the shape of the lamp housing 2 can be changed. It becomes simple and the lamp housing 2 can be easily molded.
  • the length of the bent portion 13 in the knotting direction Q is defined as X
  • the length of the continuous portion 12 in the protruding direction P from the design surface portion 7 is defined as Y
  • the case where X and Y are substantially the same length is used as a reference. (See FIG. 6).
  • the bent portion 13 has a joined portion 8b that is melted at the time of joining, and the length of the bent portion 13 in the knotting direction Q is shorter after joining than before joining.
  • X is the length before joining, and is set to, for example, 2 mm to 3 mm in consideration of the presence of the joined portion 8b to be melted.
  • Y is, for example, about 3 mm.
  • the arrangement recess 101 for arranging the outer peripheral portion of the vehicle lamp 1 in the vehicle body 100 becomes a shallow recess, and the design restrictions of the vehicle body 100 are reduced.
  • the arrangement recess 101 is formed, for example, by drawing using a metal material.
  • the cover 3 is formed by injection molding using a mold, since the total length of X and Y is not excessively long, the sink marks generated in the protrusion forming portion 10 in the cooling process of injection molding are reduced. , High molding accuracy of the cover 3 can be ensured.
  • the burr B becomes difficult to be visually recognized from the gap between the vehicle body 100 and the cover 3, and the visibility can be improved.
  • the shielding portion 9 is positioned close to the hot plate 70 when heated by the hot plate 70 in hot plate welding, so that the shielding portion 9 is deformed by heat. Since the joint portion 8b and the shield portion 9 are located close to each other, the burr B generated by the melting of the joint portion 8b may adhere to the shield portion 9. However, since the total length of X and Y is not excessively shortened, it is possible to prevent such deformation of the shielding portion 9 due to heat and adhesion of burrs B to the shielding portion 9.
  • the arrangement recess 101 for arranging the outer peripheral portion of the vehicle lamp 1 in the vehicle body 100 becomes a deep recess, which may cause design restrictions on the vehicle body 100. ..
  • the burr B is easily visible from the gap between the vehicle body 100 and the cover 3, which may hinder visibility from the viewpoint of visibility.
  • the shielding portion 9 is located away from the hot plate 70 when heated by the hot plate 70 in hot plate welding, so that the shielding portion 9 is less likely to be deformed by heat and is joined. Since the portion 8b and the shielding portion 9 are positioned apart from each other, it is possible to prevent the burr B from adhering to the shielding portion 9.
  • the arrangement recess 101 for arranging the outer peripheral portion of the vehicle lamp 1 in the vehicle body 100 becomes a deep recess, which may cause design restrictions on the vehicle body 100. ..
  • the burr B becomes difficult to be visually recognized from the gap between the vehicle body 100 and the cover 3, and the visibility can be improved.
  • the shielding portion 9 is located away from the hot plate 70 when heated by the hot plate 70 in hot plate welding, so that the shielding portion 9 is less likely to be deformed by heat and is joined. Since the portion 8b and the shielding portion 9 are positioned apart from each other, it is possible to prevent the burr B from adhering to the shielding portion 9.
  • the above shows an example in which the design surface portion 7 is provided with the shielding portion 9 located on the outer peripheral side of the welding leg portion 8, but the cover 3 has the welding leg portion 8 protruding from the outer peripheral portion of the design surface portion 7 to shield the design surface portion 7.
  • the configuration may be such that the part 9 does not exist.
  • the shielding portion 9 does not exist, the visibility does not decrease due to the presence of the shielding portion 9 itself, and the visibility can be improved.
  • the size of the light transmitting portion 11 can be increased by the amount that the welding leg portion 8 protrudes from the outer peripheral portion of the design surface portion 7, and the irradiation region of the light emitted from the light source can be further widened. Can be done.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The present invention is provided with a lamp housing (2) that has an inner space and has a weld surface (8a) formed therein, and a cover (3) for covering the inner space, wherein: the cover is joined to the lamp housing by a hot plate welding; the cover is provided with a decorative surface part (7) having an outer surface (3a) facing the vehicle outside and a weld leg part (8) protruding from the decorative surface part and welded to a weld surface; and the weld leg part is provided with a connection section (12) continuous to the decorative surface section and a bent section (13) which is bent toward the outer peripheral side of the decorative surface section and in which a tip section (8b) is welded to the weld surface.

Description

車輌用灯具及び車輌用灯具のカバーVehicle lighting fixtures and vehicle lighting fixture covers
　本発明は、カバーがランプハウジングに熱板溶着によって接合される車輌用灯具及び車輌用灯具のカバーについての技術分野に関する。 The present invention relates to a vehicle lighting fixture in which a cover is joined to a lamp housing by hot plate welding and a technical field of a vehicle lighting fixture cover.
　車輌用灯具は、一般に、開口を有するランプハウジングと開口を閉塞する状態でランプハウジングに接合されるカバーとを有し、ランプハウジングとカバーによって構成された灯具外筐の内部にランプユニット等の所要の各部が配置されている。 Generally, a lamp housing for a vehicle has a lamp housing having an opening and a cover joined to the lamp housing in a state of closing the opening, and a lamp unit or the like is required inside a lamp housing and a lamp outer housing composed of the cover. Each part of is arranged.
　このような車輌用灯具においては、ランプハウジングにカバーを接合する方法としてホットメルトを用いた接着による方法があるが、ランプハウジングとホットメルトの分離が困難であり、近年、資源のリサイクルの観点から溶着によりカバーがランプハウジングに接合されることも多くなっている（例えば、特許文献１参照）。 In such vehicle lamps, there is a method of bonding the cover to the lamp housing by bonding using hot melt, but it is difficult to separate the lamp housing and hot melt, and in recent years, from the viewpoint of resource recycling. The cover is often joined to the lamp housing by welding (see, for example, Patent Document 1).
　溶着による方法には熱板溶着による方法があり、熱板溶着による方法は高い溶着強度が確保され接着剤等の消耗材が必要なく対象となる樹脂の選択の範囲が広く三次元形状の製品の接合に適する等の利点を有しており、カバーのランプハウジングに対する接合方法として普及している。 There is a method by hot plate welding as a method by welding, and the method by hot plate welding ensures high welding strength, does not require consumables such as adhesives, and has a wide range of selection of target resins, and products with a three-dimensional shape. It has advantages such as being suitable for joining, and is widely used as a joining method for a cover to a lamp housing.
　熱板溶着によりカバーをランプハウジングに接合する場合には、ランプハウジングに溶着面が形成されカバーには意匠面部における外周側の部分から突出された溶着脚部が設けられることにより行われる。意匠面部は外面が車輌の外方を向く部分であり、溶着脚部は溶着面に熱板溶着によって接合される部分であり、溶着脚部の先端部が溶融されることにより溶着面に接合される。 When the cover is joined to the lamp housing by hot plate welding, a welded surface is formed on the lamp housing, and the cover is provided with a welded leg portion protruding from the outer peripheral side portion of the design surface portion. The design surface portion is a portion where the outer surface faces the outside of the vehicle, the welding leg portion is a portion joined to the welding surface by hot plate welding, and the tip portion of the welding leg portion is joined to the welding surface by melting. To.
　熱板溶着によるカバーのランプハウジングに対する接合時には、ランプハウジングとカバーがそれぞれ第１の治具と第２の治具によって保持され溶着脚部と接合面が熱板によって加熱されて溶融可能な状態にされており、第２の治具が第１の治具に近付く方向へ移動されることによりカバーがランプハウジングに圧着方向において押圧され、溶着面に押し付けられた溶着脚部の先端部が溶融される。従って、圧着方向は第２の治具の第１の治具に対する移動方向である。 When the cover is joined to the lamp housing by hot plate welding, the lamp housing and the cover are held by the first jig and the second jig, respectively, and the welded legs and the joint surface are heated by the hot plate so that they can be melted. By moving the second jig toward the first jig, the cover is pressed against the lamp housing in the crimping direction, and the tip of the welded leg pressed against the welded surface is melted. To. Therefore, the crimping direction is the moving direction of the second jig with respect to the first jig.
特開２００２－７５０２３２号公報JP-A-2002-750232
　ところで、車輌用灯具のカバーは、特許文献１にも示されるように、意匠面部が車体の形状等に応じて湾曲されることが多く、溶着脚部は意匠面部における外周側の部分から突出されるため、溶着脚部の意匠面部からの突出方向が熱板溶着による接合時における圧着方向に一致しない。 By the way, as shown in Patent Document 1, the cover of a vehicle lamp often has a design surface portion curved according to the shape of the vehicle body or the like, and the welded leg portion protrudes from the outer peripheral side portion of the design surface portion. Therefore, the protruding direction of the welded leg from the design surface does not match the crimping direction at the time of joining by hot plate welding.
　従って、溶着脚部がランプハウジングの溶着面に押し付けられるときの両者の接する方向と熱板溶着による接合時における圧着方向とが異なる方向になってしまい、カバーのランプハウジングに対する接合強度が低下するおそれがある。 Therefore, when the welded leg is pressed against the welded surface of the lamp housing, the contact direction between the two is different from the crimping direction at the time of joining by hot plate welding, and the bonding strength of the cover to the lamp housing may decrease. There is.
　そこで、本発明車輌用灯具及び車輌用灯具のカバーは、カバーのランプハウジングに対する高い接合強度を確保することを目的とする。 Therefore, the vehicle lighting fixture of the present invention and the vehicle lighting fixture cover are intended to ensure high bonding strength to the lamp housing of the cover.
　第１に、本発明に係る車輌用灯具は、内部空間を有し溶着面が形成されたランプハウジングと前記内部空間を覆うカバーとを備え前記カバーが前記ランプハウジングに熱板溶着によって接合される車輌用灯具であって、前記カバーには外面が車輌の外方を向く意匠面部と前記意匠面部から突出され前記溶着面に溶着される溶着脚部とが設けられ、前記溶着脚部には、前記意匠面部に連続する連続部と、前記連続部に対して前記意匠面部の外周側に屈曲され先端部が前記溶着面に溶着される屈曲部とが設けられたものである。 First, the vehicle lamp according to the present invention includes a lamp housing having an internal space and a welded surface formed thereof, and a cover covering the internal space, and the cover is joined to the lamp housing by hot plate welding. A vehicle lamp, the cover is provided with a design surface portion whose outer surface faces the outside of the vehicle and a welding leg portion that protrudes from the design surface portion and is welded to the welding surface. The welding leg portion is provided with a welding leg portion. A continuous portion continuous with the design surface portion and a bent portion that is bent toward the outer peripheral side of the design surface portion with respect to the continuous portion and the tip portion is welded to the welded surface are provided.
　これにより、溶着脚部がランプハウジングの溶着面に押し付けられるときの両者の接する方向が熱板溶着による接合時における圧着方向に近付く方向に屈曲部が連続部に対して屈曲される。 As a result, the bent portion is bent with respect to the continuous portion in a direction in which the contact direction between the two when the welded leg is pressed against the welded surface of the lamp housing approaches the crimping direction at the time of joining by hot plate welding.
　第２に、上記した本発明に係る車輌用灯具においては、前記連続部の前記意匠面部からの突出方向は熱板溶着において前記カバーが前記ランプハウジングに圧着されるときの圧着方向に対して３０度より大きくされることが望ましい。 Secondly, in the vehicle lamp according to the present invention described above, the protruding direction of the continuous portion from the design surface portion is 30 with respect to the crimping direction when the cover is crimped to the lamp housing in hot plate welding. It is desirable to make it larger than the degree.
　これにより、意匠面部における溶着脚部より内周側の部分である光を透過する部分の大きさが大きくなるため、光源から出射される光のカバーにおける透過領域が大きくなる。 As a result, the size of the portion of the design surface portion on the inner peripheral side of the welded leg portion that transmits light becomes large, so that the transmission region of the light cover emitted from the light source becomes large.
　第３に、上記した本発明に係る車輌用灯具においては、前記連続部と前記屈曲部の境界部分が屈曲端部として形成され、前記屈曲部における前記先端部と前記屈曲端部を結ぶ方向が結び方向とされ、前記結び方向が前記圧着方向に一致されることが望ましい。 Thirdly, in the vehicle lamp according to the present invention described above, the boundary portion between the continuous portion and the bent portion is formed as a bent end portion, and the direction connecting the tip portion and the bent end portion in the bent portion is It is desirable that the knotting direction is the same as the crimping direction.
　これにより、熱板溶着においてカバーがランプハウジングに接合されるときに、結び方向が圧着方向に一致された屈曲部が溶着面に突き当てられる。 As a result, when the cover is joined to the lamp housing in hot plate welding, the bent portion whose knotting direction coincides with the crimping direction is abutted against the welded surface.
　第４に、上記した本発明に係る車輌用灯具においては、前記意匠面部の外周部が前記溶着脚部より外側に位置されることが望ましい。 Fourth, in the vehicle lamp according to the present invention described above, it is desirable that the outer peripheral portion of the design surface portion is located outside the welded leg portion.
　これにより、意匠面部の外周部が溶着脚部を遮蔽する遮蔽部として機能し、溶着脚部の溶着面との接合部分が車体とカバーの隙間から視認され難い。 As a result, the outer peripheral portion of the design surface portion functions as a shielding portion that shields the welded leg portion, and the joint portion of the welded leg portion with the welded surface is difficult to be visually recognized from the gap between the vehicle body and the cover.
　第５に、本発明に係る車輌用灯具のカバーは、内部空間を有し溶着面が形成されたランプハウジングに熱板溶着によって接合される車輌用灯具のカバーであって、外面が車輌の外方を向く意匠面部と前記意匠面部から突出され前記溶着面に溶着される溶着脚部とが設けられ、前記溶着脚部には、前記意匠面部に連続する連続部と、前記連続部に対して前記意匠面部の外周側に屈曲され先端部が前記溶着面に溶着される屈曲部とが設けられたものである。 Fifth, the vehicle lamp cover according to the present invention is a vehicle lamp cover that is joined to a lamp housing having an internal space and having a welded surface formed by hot plate welding, and the outer surface is the outside of the vehicle. A design surface portion facing toward the direction and a welded leg portion that protrudes from the design surface portion and is welded to the welded surface are provided, and the welded leg portion has a continuous portion continuous with the design surface portion and a continuous portion with respect to the continuous portion. A bent portion that is bent on the outer peripheral side of the design surface portion and the tip portion is welded to the welded surface is provided.
　これにより、溶着脚部がランプハウジングの溶着面に押し付けられるときの両者の接する方向が熱板溶着による接合時における圧着方向に近付く方向に屈曲部が連続部に対して屈曲される。 As a result, the bent portion is bent with respect to the continuous portion in a direction in which the contact direction between the two when the welded leg is pressed against the welded surface of the lamp housing approaches the crimping direction at the time of joining by hot plate welding.
　本発明によれば、溶着脚部がランプハウジングの溶着面に押し付けられるときの両者の接する方向が熱板溶着による接合時における圧着方向に近付く方向に屈曲部が連続部に対して屈曲されるため、カバーのランプハウジングに対する高い接合強度を確保することができる。 According to the present invention, when the welding leg portion is pressed against the welding surface of the lamp housing, the bending portion is bent with respect to the continuous portion in a direction in which the contact direction between the two is closer to the crimping direction at the time of joining by hot plate welding. , High bonding strength of the cover to the lamp housing can be ensured.
図２乃至図８と共に本発明車輌用灯具及び車輌用灯具のカバーの実施の形態を示すものであり、本図は、車輌用灯具を示す断面図である。2 to 8 show an embodiment of the vehicle lamp and the cover of the vehicle lamp of the present invention, and this figure is a cross-sectional view showing the vehicle lamp. カバーの一部を示す図である。It is a figure which shows a part of a cover. 熱板溶着においてカバーとランプハウジングが熱板によって加熱されている状態を示す断面図である。It is sectional drawing which shows the state which a cover and a lamp housing are heated by a hot plate in hot plate welding. 熱板溶着においてカバーがランプハウジングに接合された状態を示す断面図である。It is sectional drawing which shows the state which the cover is joined to the lamp housing in the hot plate welding. 本発明に至った経緯を示す図である。It is a figure which shows the background which came to this invention. 屈曲部の結び方向における長さと連続部の意匠面部からの突出方向における長さとが略同じ長さにされた例を示す図である。It is a figure which shows the example which made the length in the knotting direction of a bent part and the length in a protruding direction from a design surface part of a continuous part substantially the same. 屈曲部の結び方向における長さが連続部の意匠面部からの突出方向における長さに対して長くされた例を示す図である。It is a figure which shows the example which made the length in the knotting direction of a bent part longer than the length in a protruding direction from a design surface part of a continuous part. 連続部の意匠面部からの突出方向における長さが屈曲部の結び方向における長さに対して長くされた例を示す図である。It is a figure which shows the example which the length in the protruding direction from a design surface part of a continuous part is made longer than the length in a knotting direction of a bent part.
　以下に、本発明車輌用灯具及び車輌用灯具のカバーを実施するための形態について添付図面を参照して説明する。 The vehicle lighting fixtures of the present invention and the modes for implementing the cover of the vehicle lighting fixtures will be described below with reference to the attached drawings.
　＜車輌用灯具の構成＞
　先ず、車輌用灯具１の構成について説明する（図１及び図２参照）。 <Structure of vehicle lighting equipment>
First, the configuration of the vehicle lamp 1 will be described (see FIGS. 1 and 2).
　車輌用灯具１はランプハウジング２とカバー３を有し、カバー３がランプハウジング２に熱板溶着によって接合される。以下の説明においては理解を容易にするために、熱板溶着による接合時においてランプハウジング２とカバー３が保持される位置に対応して前後上下左右の方向を示すものとする。従って、カバー３が位置する側を上方とし、ランプハウジング２が位置する側を下方とし、各図に示す断面形状においてカバー３の外周部が位置する方向を便宜上左右方向とする。 The vehicle lamp 1 has a lamp housing 2 and a cover 3, and the cover 3 is joined to the lamp housing 2 by hot plate welding. In the following description, in order to facilitate understanding, the front-back, up-down, left-right directions are shown corresponding to the positions where the lamp housing 2 and the cover 3 are held at the time of joining by hot plate welding. Therefore, the side where the cover 3 is located is upward, the side where the lamp housing 2 is located is downward, and the direction in which the outer peripheral portion of the cover 3 is located in the cross-sectional shape shown in each figure is the left-right direction for convenience.
　但し、以下に示す前後上下左右の方向は説明の便宜上のものであり、本発明の実施に関しては、これらの方向に限定されることはない。 However, the front-back, up-down, left-right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.
　また、参照する各図には、本発明の理解を容易にするために、例として、車輌用灯具１を回転対称の簡素な形状にして示す。 Further, in each reference figure, in order to facilitate understanding of the present invention, as an example, the vehicle lamp 1 is shown in a simple shape that is rotationally symmetric.
　車輌用灯具１は、上記したように、カバー３がランプハウジング２に熱板溶着によって接合され、熱板溶着においてカバー３がランプハウジング２に圧着されることにより接合される。従って、圧着方向Ｓは上下方向にされている（図１参照）。 As described above, the vehicle lamp 1 is joined by joining the cover 3 to the lamp housing 2 by hot plate welding, and by crimping the cover 3 to the lamp housing 2 in the hot plate welding. Therefore, the crimping direction S is set in the vertical direction (see FIG. 1).
　ランプハウジング２は、例えば、ＡＢＳ樹脂（アクリロニトリル共重合体樹脂）等の樹脂材料によって形成され、内部空間を有している。ランプハウジング２は上方に開口された凹状の本体部４と本体部４の上端部から外方に張り出された環状のフランジ部５とフランジ部５から上方に突出された環状の接合用突部６とを有している。接合用突部６の上面は溶着面６ａとして形成されている。 The lamp housing 2 is formed of a resin material such as ABS resin (acrylonitrile copolymer resin) and has an internal space. The lamp housing 2 has a concave main body 4 opened upward, an annular flange portion 5 protruding outward from the upper end portion of the main body 4, and an annular joining protrusion protruding upward from the flange portion 5. Has 6 and. The upper surface of the bonding protrusion 6 is formed as a welding surface 6a.
　カバー３は、例えば、アクリル等の透明な樹脂材料によって形成され、外面３ａが車輌の外方を向く意匠面部７と意匠面部７の内面７ａにおける外周寄りの部分から突出された溶着脚部８とが一体に形成されて成る。カバー３は内部空間を覆う状態でランプハウジング２に接合される。 The cover 3 is formed of, for example, a transparent resin material such as acrylic, and has a design surface portion 7 having an outer surface 3a facing outward of the vehicle and a welded leg portion 8 protruding from an outer peripheral portion of the inner surface 7a of the design surface portion 7. Are formed integrally. The cover 3 is joined to the lamp housing 2 so as to cover the internal space.
　意匠面部７は車体の形状に応じてランプハウジング２の反対側に凸になるように湾曲されており、曲面状に形成されている。意匠面部７における溶着脚部８より外側の部分は遮蔽部９として設けられている（図１及び図２参照）。意匠面部７は、溶着脚部８が突出された部分である遮蔽部９の内側の部分が突部形成部１０として設けられ、突部形成部１０の内側の部分、即ち、遮蔽部９と突部形成部１０以外の部分が光透過部１１として設けられている。 The design surface portion 7 is curved so as to be convex on the opposite side of the lamp housing 2 according to the shape of the vehicle body, and is formed in a curved surface shape. A portion of the design surface portion 7 outside the welded leg portion 8 is provided as a shielding portion 9 (see FIGS. 1 and 2). In the design surface portion 7, a portion inside the shielding portion 9 which is a portion where the welding leg portion 8 is projected is provided as a protrusion forming portion 10, and the inner portion of the protrusion forming portion 10, that is, the shielding portion 9 and the protrusion A portion other than the portion forming portion 10 is provided as a light transmitting portion 11.
　溶着脚部８は意匠面部７に連続する連続部１２と連続部１２に対して屈曲された屈曲部１３とから成る。溶着脚部８は屈曲部１３の先端面が接合面８ａとして形成され、接合面８ａを含む屈曲部１３の先端部が接合部８ｂとして設けられている（図２参照）。溶着脚部８は連続部１２と屈曲部１３の境界部分が屈曲端部８ｃとして形成されている。 The welded leg portion 8 is composed of a continuous portion 12 continuous with the design surface portion 7 and a bent portion 13 bent with respect to the continuous portion 12. In the welded leg portion 8, the tip end surface of the bent portion 13 is formed as a joint surface 8a, and the tip end portion of the bent portion 13 including the joint surface 8a is provided as a joint portion 8b (see FIG. 2). In the welded leg portion 8, the boundary portion between the continuous portion 12 and the bent portion 13 is formed as a bent end portion 8c.
　連続部１２は遮蔽部９と突部形成部１０が連続する方向Ａに対して、例えば、略直交する方向に突出され、連続部１２の突出方向Ｐは圧着方向Ｓに対する傾斜角度θが３０度より大きくされている。屈曲部１３は連続部１２に対して意匠面部７の外周側、即ち、遮蔽部９側に屈曲されている。屈曲部１３は接合部８ｂと屈曲端部８ｃを結ぶ方向が結び方向Ｑとされている。 The continuous portion 12 is projected in a direction substantially orthogonal to, for example, a direction in which the shielding portion 9 and the protrusion forming portion 10 are continuous, and the protruding direction P of the continuous portion 12 has an inclination angle θ of 30 degrees with respect to the crimping direction S. It has been made larger. The bent portion 13 is bent toward the outer peripheral side of the design surface portion 7, that is, the shielding portion 9 side with respect to the continuous portion 12. The bending direction Q is the direction in which the bending portion 13 connects the joint portion 8b and the bending end portion 8c.
　屈曲部１３は結び方向Ｑが圧着方向Ｓに一致されている。但し、結び方向Ｑは圧着方向Ｓに対して一定の角度以下にされていればよく、圧着方向Ｓに対して、例えば、３０度以下にされていてもよい。 The knotting direction Q of the bent portion 13 coincides with the crimping direction S. However, the knotting direction Q may be set to a certain angle or less with respect to the crimping direction S, and may be set to, for example, 30 degrees or less with respect to the crimping direction S.
　＜接合作業の手順＞
　以下に、カバー３のランプハウジング２に対する熱板溶着による接合作業の手順について簡単に説明する（図３及び図４参照）。 <Procedure of joining work>
The procedure for joining the cover 3 to the lamp housing 2 by hot plate welding will be briefly described below (see FIGS. 3 and 4).
　熱板溶着によるカバー３のランプハウジング２に対する接合時には、ランプハウジング２とカバー３がそれぞれ第１の治具５０と第２の治具６０によって保持され、カバー３がランプハウジング２の上方において離隔して位置される（図３参照）。 When the cover 3 is joined to the lamp housing 2 by hot plate welding, the lamp housing 2 and the cover 3 are held by the first jig 50 and the second jig 60, respectively, and the cover 3 is separated above the lamp housing 2. (See FIG. 3).
　次に、ランプハウジング２とカバー３がそれぞれ第１の治具５０と第２の治具６０によって保持された状態において、ランプハウジング２とカバー３の間に熱板７０が移動され、ランプハウジング２の接合用突部６とカバー３の溶着脚部８とが熱板７０によって加熱される。熱板７０の加熱により接合用突部６の溶着面６ａを含む上端部と溶着脚部８の接合部８ｂとが溶融可能な状態にされる。 Next, in a state where the lamp housing 2 and the cover 3 are held by the first jig 50 and the second jig 60, respectively, the heat plate 70 is moved between the lamp housing 2 and the cover 3, and the lamp housing 2 is moved. The joining protrusion 6 and the welding leg 8 of the cover 3 are heated by the hot plate 70. By heating the hot plate 70, the upper end portion of the bonding protrusion 6 including the welding surface 6a and the bonding portion 8b of the welding leg portion 8 are brought into a meltable state.
　次いで、熱板７０が移動されてランプハウジング２とカバー３の間から退避されると共に第２の治具６０が下降されてカバー３がランプハウジング２に圧着方向Ｓにおいて押し付けられ、接合用突部６の溶着面６ａに溶着脚部８の接合面８ａが上方から圧着される（図４参照）。このとき接合用突部６の溶着面６ａを含む上端部と溶着脚部８の接合部８ｂとが溶融可能な状態にされているため、接合用突部６の上端部と溶着脚部８の接合部８ｂとが溶融され、カバー３がランプハウジング２に接合される。 Next, the hot plate 70 is moved and retracted from between the lamp housing 2 and the cover 3, and the second jig 60 is lowered to press the cover 3 against the lamp housing 2 in the crimping direction S. The joint surface 8a of the welding leg portion 8 is crimped from above to the welding surface 6a of No. 6 (see FIG. 4). At this time, since the upper end portion of the joining protrusion 6 including the welding surface 6a and the joining portion 8b of the welding leg portion 8 are in a meltable state, the upper end portion of the joining protrusion 6 and the welding leg portion 8 The joint portion 8b is melted, and the cover 3 is joined to the lamp housing 2.
　ランプハウジング２とカバー３はそれぞれ第１の治具５０と第２の治具６０から取り出され、熱板溶着によるカバー３のランプハウジング２に対する接合作業が終了する。 The lamp housing 2 and the cover 3 are taken out from the first jig 50 and the second jig 60, respectively, and the joining work of the cover 3 to the lamp housing 2 by hot plate welding is completed.
　カバー３がランプハウジング２に接合されることによりランプハウジング２とカバー３によって灯具外筐１４が構成される（図１参照）。灯具外筐１４の内部は灯室１４ａとして形成され、灯室１４ａには光源やリフレクター等の所要の各部を有する図示しない灯具ユニットが配置され、車輌用灯具１が構成される。 By joining the cover 3 to the lamp housing 2, the lamp housing 2 and the cover 3 form the lamp outer housing 14 (see FIG. 1). The inside of the lamp outer casing 14 is formed as a lamp chamber 14a, and a lamp unit (not shown) having necessary parts such as a light source and a reflector is arranged in the lamp chamber 14a to form a vehicle lamp 1.
　車輌用灯具１において、光源から出射された光は、例えば、リフレクターで反射され、カバー３の光透過部１１を透過され外部へ向けて照射される。 In the vehicle lamp 1, the light emitted from the light source is reflected by, for example, a reflector, transmitted through the light transmitting portion 11 of the cover 3, and is irradiated to the outside.
　＜本発明に至った経緯＞
　続いて、本発明に至った経緯について説明する（図５参照）。 <History of the present invention>
Subsequently, the background to the present invention will be described (see FIG. 5).
　カバーにおいては、上記したように、意匠面部７が車体１００の形状に応じて湾曲される形状に形成されるため、意匠面部７に対して略直交する方向に突出された溶着脚部８Ａが設けられた場合には、接合用突部６の溶着面６ａに対して溶着脚部８Ａが傾斜する（図５（Ａ）参照）。従って、カバー３のランプハウジング２に対する接合強度が低下するおそれがある。 In the cover, as described above, since the design surface portion 7 is formed in a shape that is curved according to the shape of the vehicle body 100, the welded leg portion 8A that protrudes in a direction substantially orthogonal to the design surface portion 7 is provided. If so, the welding leg portion 8A is inclined with respect to the welding surface 6a of the joining protrusion 6 (see FIG. 5 (A)). Therefore, the bonding strength of the cover 3 to the lamp housing 2 may decrease.
　そこで、意匠面部７に対して溶着脚部８Ｂを圧着方向Ｓに一致する方向へ突出させることにより、カバー３のランプハウジング２に対する高い接合強度を確保することができる（図５（Ｂ）参照）。 Therefore, by projecting the welded leg portion 8B with respect to the design surface portion 7 in the direction corresponding to the crimping direction S, a high bonding strength of the cover 3 to the lamp housing 2 can be ensured (see FIG. 5B). ..
　しかしながら、カバー３がランプハウジング２に接合された状態においては、接合部８ｂと接合用突部６が溶融されて生じる溶融によるはみ出し部分である所謂バリＢが存在し、溶着脚部８Ｂを圧着方向Ｓに一致する方向へ突出させた場合には、溶着脚部８Ｂの先端部が車体１００に近付いて位置されるため、バリＢが車体１００とカバー３の隙間から視認され易くなる。 However, in the state where the cover 3 is joined to the lamp housing 2, there is a so-called burr B which is a protruding portion due to melting generated by melting the joint portion 8b and the joining protrusion 6, and the welding leg portion 8B is crimped. When projecting in the direction corresponding to S, the tip of the welded leg portion 8B is positioned close to the vehicle body 100, so that the burr B is easily visible from the gap between the vehicle body 100 and the cover 3.
　従って、カバー３のランプハウジング２に対する高い接合強度を確保することができるものの、被視認性の低下を来すおそれがある。 Therefore, although it is possible to secure a high bonding strength of the cover 3 to the lamp housing 2, there is a risk that visibility will be reduced.
　そこで、意匠面部７に対して溶着脚部８Ｂを圧着方向Ｓに一致する方向へ突出させた場合に、意匠面部７における溶着脚部８Ｂの外側の部分を外周側に大きくした幅広の遮蔽部９Ｃを設けることにより、バリＢが車体１００とカバー３の隙間から視認され難くなり、被視認性の向上を図ることができる（図５（Ｃ）参照）。 Therefore, when the welded leg portion 8B is projected from the design surface portion 7 in the direction corresponding to the crimping direction S, the wide shielding portion 9C in which the outer portion of the welded leg portion 8B on the design surface portion 7 is enlarged toward the outer peripheral side. By providing the above, the burr B is less likely to be visually recognized from the gap between the vehicle body 100 and the cover 3, and the visibility can be improved (see FIG. 5C).
　しかしながら、幅広の遮蔽部９Ｃが設けられた場合には、意匠面部７に溶着脚部８Ｂから外側に大きく突出された幅広の部分が存在してしまうため、幅広の遮蔽部９Ｃ自体の存在による被視認性の低下を来すおそれがある。また、意匠面部７の全体の大きさは車体１００の大きさや形状に応じて一定の大きさに定められるため、大きな遮蔽部９Ｃが設けられる場合には、その分、溶着脚部８Ｂを内周側に設ける必要が生じ、光透過部１１の大きさが小さくなる。 However, when the wide shielding portion 9C is provided, the design surface portion 7 has a wide portion that greatly protrudes outward from the welded leg portion 8B, so that the wide shielding portion 9C itself is covered. There is a risk of reduced visibility. Further, since the overall size of the design surface portion 7 is set to a constant size according to the size and shape of the vehicle body 100, if a large shielding portion 9C is provided, the welded leg portion 8B is provided on the inner circumference accordingly. It becomes necessary to provide it on the side, and the size of the light transmitting portion 11 becomes smaller.
　従って、カバー３のランプハウジング２に対する高い接合強度を確保することができるものの、遮蔽部９Ｃ自体による被視認性の低下や照射領域の低減を来すおそれがある。 Therefore, although it is possible to secure a high bonding strength of the cover 3 to the lamp housing 2, there is a risk that the shielding portion 9C itself will reduce the visibility and the irradiation area.
　そこで、本発明車輌用灯具１及びカバー３においては、意匠面部７に連続する連続部１２と連続部１２に対して意匠面部７の外周側に屈曲された屈曲部１３とから成る溶着脚部８を設けている（図５（Ｄ）参照）。 Therefore, in the vehicle lamp 1 and the cover 3 of the present invention, the welded leg portion 8 is composed of a continuous portion 12 continuous with the design surface portion 7 and a bent portion 13 bent toward the outer peripheral side of the design surface portion 7 with respect to the continuous portion 12. (See FIG. 5 (D)).
　＜まとめ＞
　車輌用灯具１においては、上記のような連続部１２と屈曲部１３が設けられることにより、溶着脚部８がランプハウジング２の溶着面６ａに押し付けられるときの両者の接する方向が熱板溶着による接合時における圧着方向Ｓに近付く方向に屈曲部１３が連続部１２に対して屈曲されるため、カバー３のランプハウジング２に対する高い接合強度を確保することができる。 <Summary>
In the vehicle lamp 1, the continuous portion 12 and the bent portion 13 as described above are provided, so that the direction in which the welding leg portion 8 is pressed against the welding surface 6a of the lamp housing 2 is due to hot plate welding. Since the bent portion 13 is bent with respect to the continuous portion 12 in the direction approaching the crimping direction S at the time of joining, a high joining strength of the cover 3 to the lamp housing 2 can be ensured.
　また、溶着脚部８の全体が圧着方向Ｓに一致する方向に延びる形状にされないため、溶融によるはみ出し部分であるバリＢが車体１００とカバー３の隙間から視認され難く、バリＢが視認され難くするための幅広の遮蔽部９Ｃを設ける必要もなく、被視認性の向上を図ることができる。 Further, since the entire welding leg portion 8 is not formed to extend in the direction corresponding to the crimping direction S, the burr B, which is a protruding portion due to melting, is difficult to be visually recognized from the gap between the vehicle body 100 and the cover 3, and the burr B is difficult to be visually recognized. It is not necessary to provide a wide shielding portion 9C for this purpose, and visibility can be improved.
　さらに、幅広の遮蔽部９Ｃを設ける必要がないため、意匠面部７の光透過部１１の大きさが小さくならず、光源から出射される光の照射領域を広範囲にすることができる。 Further, since it is not necessary to provide the wide shielding portion 9C, the size of the light transmitting portion 11 of the design surface portion 7 is not reduced, and the irradiation region of the light emitted from the light source can be widened.
　さらにまた、連続部１２の意匠面部７からの突出方向Ｐはカバー３がランプハウジング２に圧着されるときの圧着方向Ｓに対して３０度より大きくされている。 Furthermore, the protruding direction P of the continuous portion 12 from the design surface portion 7 is made larger than 30 degrees with respect to the crimping direction S when the cover 3 is crimped to the lamp housing 2.
　従って、意匠面部７における溶着脚部８より内周側の部分である光透過部１１の大きさが大きくなるため、光源から出射される光のカバー３における透過領域が大きくなり、照射領域を一層大きくして輝度の向上を図ることができる。 Therefore, since the size of the light transmitting portion 11 which is a portion on the inner peripheral side of the welded leg portion 8 of the design surface portion 7 becomes large, the transmission region of the light cover 3 emitted from the light source becomes large, and the irradiation region becomes even larger. It can be increased to improve the brightness.
　また、屈曲部１３の結び方向Ｑが圧着方向Ｓに一致されているため、熱板溶着においてカバー３がランプハウジング２に接合されるときに、結び方向Ｑが圧着方向Ｓに一致された屈曲部１３が溶着面６ａに突き当てられるため、カバー３のランプハウジング２に対する一層高い接合強度を確保することができる。 Further, since the knotting direction Q of the bent portion 13 coincides with the crimping direction S, the bent portion whose knotting direction Q coincides with the crimping direction S when the cover 3 is joined to the lamp housing 2 in hot plate welding. Since the 13 is abutted against the welding surface 6a, a higher bonding strength of the cover 3 to the lamp housing 2 can be ensured.
　さらに、意匠面部７の外周部が溶着脚部８より外側に位置されているため、意匠面部７の外周部が溶着脚部８を遮蔽する遮蔽部９として機能し、溶着脚部８の溶着面６ａとの接合部分が車体１００とカバー３の隙間から視認され難く、被視認性の向上を図ることができる。 Further, since the outer peripheral portion of the design surface portion 7 is located outside the welded leg portion 8, the outer peripheral portion of the design surface portion 7 functions as a shielding portion 9 for shielding the welded leg portion 8, and the welded surface of the welded leg portion 8 is provided. The joint portion with 6a is difficult to be visually recognized from the gap between the vehicle body 100 and the cover 3, and visibility can be improved.
　さらにまた、溶着脚部８がランプハウジング２の溶着面６ａに傾いた状態で押し付けられ難いため、溶着により発生するバリＢが溶着脚部８の外周側と内周側で均等の大きさで生じ易い。従って、接合用突部６にバリＢの過度のはみ出しを防止するための溝や壁を形成する必要がなく、溶着面６ａを平面状に形成することが可能になり、ランプハウジング２の形状が簡素になりランプハウジング２の成形を容易に行うことができる。 Furthermore, since the welded leg portion 8 is difficult to be pressed against the welded surface 6a of the lamp housing 2 in an inclined state, burrs B generated by welding are generated at equal sizes on the outer peripheral side and the inner peripheral side of the welded leg portion 8. easy. Therefore, it is not necessary to form a groove or a wall in the joining protrusion 6 to prevent excessive protrusion of the burr B, and the welding surface 6a can be formed in a flat shape, so that the shape of the lamp housing 2 can be changed. It becomes simple and the lamp housing 2 can be easily molded.
　＜連続部と屈曲部の寸法関係＞
　次に、連続部１２と屈曲部１３の寸法関係について説明する（図６乃至図８参照）。 <Dimensional relationship between continuous part and bent part>
Next, the dimensional relationship between the continuous portion 12 and the bent portion 13 will be described (see FIGS. 6 to 8).
　屈曲部１３の結び方向Ｑにおける長さをＸとし、連続部１２の意匠面部７からの突出方向Ｐにおける長さをＹとし、ＸとＹが略同じ長さにされた場合を基準とする（図６参照）。屈曲部１３には接合時に溶融される接合部８ｂが存在し、屈曲部１３の結び方向Ｑにおける長さは接合前より接合後の方が短くなる。Ｘは接合前の長さであり、溶融される接合部８ｂが存在することを考慮して、例えば、２ｍｍ～３ｍｍにされている。Ｙは、例えば、３ｍｍ程度にされている。 The length of the bent portion 13 in the knotting direction Q is defined as X, the length of the continuous portion 12 in the protruding direction P from the design surface portion 7 is defined as Y, and the case where X and Y are substantially the same length is used as a reference. (See FIG. 6). The bent portion 13 has a joined portion 8b that is melted at the time of joining, and the length of the bent portion 13 in the knotting direction Q is shorter after joining than before joining. X is the length before joining, and is set to, for example, 2 mm to 3 mm in consideration of the presence of the joined portion 8b to be melted. Y is, for example, about 3 mm.
　ＸとＹがこのような寸法の場合には、車体１００における車輌用灯具１の外周部を配置する配置凹部１０１が浅い凹部になり、車体１００の設計上の制約は少なくなる。尚、配置凹部１０１は、例えば、金属材料を用いた絞り加工によって形成される。 When X and Y have such dimensions, the arrangement recess 101 for arranging the outer peripheral portion of the vehicle lamp 1 in the vehicle body 100 becomes a shallow recess, and the design restrictions of the vehicle body 100 are reduced. The arrangement recess 101 is formed, for example, by drawing using a metal material.
　また、カバー３は金型を用いた射出成形により形成されるが、ＸとＹの合計の長さが過度に長くならないため、射出成形の冷却工程において突部形成部１０に生じるヒケが小さくなり、カバー３の高い成形精度を確保することができる。 Further, although the cover 3 is formed by injection molding using a mold, since the total length of X and Y is not excessively long, the sink marks generated in the protrusion forming portion 10 in the cooling process of injection molding are reduced. , High molding accuracy of the cover 3 can be ensured.
　さらに、バリＢが車体１００とカバー３の隙間から視認され難くなり、被視認性の向上を図ることができる。 Further, the burr B becomes difficult to be visually recognized from the gap between the vehicle body 100 and the cover 3, and the visibility can be improved.
　一方、ＸとＹの合計の長さが過度に短いと、熱板溶着において熱板７０による加熱時に遮蔽部９が熱板７０に近付いて位置されるため遮蔽部９に熱による変形が生じたり、接合部８ｂと遮蔽部９が近付いて位置されるため接合部８ｂの溶融により生じるバリＢが遮蔽部９に付着するおそれがある。しかしながら、ＸとＹの合計の長さが過度に短くされていないため、このような遮蔽部９の熱による変形や遮蔽部９へのバリＢの付着を防止することができる。 On the other hand, if the total length of X and Y is excessively short, the shielding portion 9 is positioned close to the hot plate 70 when heated by the hot plate 70 in hot plate welding, so that the shielding portion 9 is deformed by heat. Since the joint portion 8b and the shield portion 9 are located close to each other, the burr B generated by the melting of the joint portion 8b may adhere to the shield portion 9. However, since the total length of X and Y is not excessively shortened, it is possible to prevent such deformation of the shielding portion 9 due to heat and adhesion of burrs B to the shielding portion 9.
　次に、連続部１２の意匠面部７からの突出方向Ｐにおける長さＹを変えずに、屈曲部１３の結び方向Ｑにおける長さＸを長くした場合について説明する（図７参照）。 Next, a case will be described in which the length X in the knotting direction Q of the bent portion 13 is lengthened without changing the length Y in the protruding direction P from the design surface portion 7 of the continuous portion 12 (see FIG. 7).
　ＸとＹがこのような寸法の場合には、車体１００における車輌用灯具１の外周部を配置する配置凹部１０１が深目の凹部になり、車体１００の設計上の制約が生じる可能性がある。 When X and Y have such dimensions, the arrangement recess 101 for arranging the outer peripheral portion of the vehicle lamp 1 in the vehicle body 100 becomes a deep recess, which may cause design restrictions on the vehicle body 100. ..
　また、バリＢが車体１００とカバー３の隙間から視認され易くなり、被視認性の観点において支障を来すおそれがある。 In addition, the burr B is easily visible from the gap between the vehicle body 100 and the cover 3, which may hinder visibility from the viewpoint of visibility.
　さらに、ＸとＹの合計の長さが長くなるため、突部形成部１０に生じるヒケが大きくなる可能性がある。一方、ＸとＹの合計の長さが長いため、熱板溶着において熱板７０による加熱時に遮蔽部９が熱板７０から離れて位置されるため遮蔽部９の熱による変形が生じ難く、接合部８ｂと遮蔽部９が離れて位置されるため遮蔽部９へのバリＢの付着を防止することができる。 Further, since the total length of X and Y becomes long, there is a possibility that the sink mark generated in the protrusion forming portion 10 becomes large. On the other hand, since the total length of X and Y is long, the shielding portion 9 is located away from the hot plate 70 when heated by the hot plate 70 in hot plate welding, so that the shielding portion 9 is less likely to be deformed by heat and is joined. Since the portion 8b and the shielding portion 9 are positioned apart from each other, it is possible to prevent the burr B from adhering to the shielding portion 9.
　次いで、屈曲部１３の結び方向Ｑにおける長さＸを変えずに、連続部１２の意匠面部７からの突出方向Ｐにおける長さＹを長くした場合について説明する（図８参照）。 Next, a case will be described in which the length Y of the continuous portion 12 in the protruding direction P from the design surface portion 7 is lengthened without changing the length X of the bent portion 13 in the knotting direction Q (see FIG. 8).
　ＸとＹがこのような寸法の場合には、車体１００における車輌用灯具１の外周部を配置する配置凹部１０１が深目の凹部になり、車体１００の設計上の制約が生じる可能性がある。 When X and Y have such dimensions, the arrangement recess 101 for arranging the outer peripheral portion of the vehicle lamp 1 in the vehicle body 100 becomes a deep recess, which may cause design restrictions on the vehicle body 100. ..
　一方、バリＢが車体１００とカバー３の隙間から視認され難くなり、被視認性の向上を図ることができる。 On the other hand, the burr B becomes difficult to be visually recognized from the gap between the vehicle body 100 and the cover 3, and the visibility can be improved.
　また、ＸとＹの合計の長さが長くなるため、突部形成部１０に生じるヒケが大きくなる可能性がある。一方、ＸとＹの合計の長さが長いため、熱板溶着において熱板７０による加熱時に遮蔽部９が熱板７０から離れて位置されるため遮蔽部９の熱による変形が生じ難く、接合部８ｂと遮蔽部９が離れて位置されるため遮蔽部９へのバリＢの付着を防止することができる。 Further, since the total length of X and Y becomes long, there is a possibility that the sink mark generated in the protrusion forming portion 10 becomes large. On the other hand, since the total length of X and Y is long, the shielding portion 9 is located away from the hot plate 70 when heated by the hot plate 70 in hot plate welding, so that the shielding portion 9 is less likely to be deformed by heat and is joined. Since the portion 8b and the shielding portion 9 are positioned apart from each other, it is possible to prevent the burr B from adhering to the shielding portion 9.
　＜その他＞
　上記には、意匠面部７に溶着脚部８の外周側に位置された遮蔽部９が設けられた例を示したが、カバー３は溶着脚部８が意匠面部７の外周部から突出され遮蔽部９が存在しない構成にされてもよい。この場合には、遮蔽部９が存在しないため遮蔽部９自体の存在による被視認性の低下は生じず、被視認性の向上を図ることができる。また、溶着脚部８が意匠面部７の外周部から突出される分、光透過部１１の大きさを大きくすることが可能になり、光源から出射される光の照射領域を一層広範囲にすることができる。 <Others>
The above shows an example in which the design surface portion 7 is provided with the shielding portion 9 located on the outer peripheral side of the welding leg portion 8, but the cover 3 has the welding leg portion 8 protruding from the outer peripheral portion of the design surface portion 7 to shield the design surface portion 7. The configuration may be such that the part 9 does not exist. In this case, since the shielding portion 9 does not exist, the visibility does not decrease due to the presence of the shielding portion 9 itself, and the visibility can be improved. Further, the size of the light transmitting portion 11 can be increased by the amount that the welding leg portion 8 protrudes from the outer peripheral portion of the design surface portion 7, and the irradiation region of the light emitted from the light source can be further widened. Can be done.
　１…車輌用灯具、２…ランプハウジング、３…カバー、３ａ…外面、６ａ…溶着面、７…意匠面部、８…溶着脚部、１２…連続部、１３…屈曲部 1 ... Vehicle lighting equipment, 2 ... Lamp housing, 3 ... Cover, 3a ... Outer surface, 6a ... Welding surface, 7 ... Design surface part, 8 ... Welding leg part, 12 ... Continuous part, 13 ... Bending part

Claims (5)

  1. 　内部空間を有し溶着面が形成されたランプハウジングと前記内部空間を覆うカバーとを備え前記カバーが前記ランプハウジングに熱板溶着によって接合される車輌用灯具であって、
    　前記カバーには外面が車輌の外方を向く意匠面部と前記意匠面部から突出され前記溶着面に溶着される溶着脚部とが設けられ、
    　前記溶着脚部には、前記意匠面部に連続する連続部と、前記連続部に対して前記意匠面部の外周側に屈曲され先端部が前記溶着面に溶着される屈曲部とが設けられた
    　車輌用灯具。     A lamp housing for a vehicle that includes a lamp housing having an internal space and a welded surface formed thereof and a cover that covers the internal space, and the cover is joined to the lamp housing by hot plate welding.
    The cover is provided with a design surface portion whose outer surface faces the outside of the vehicle and a welding leg portion which protrudes from the design surface portion and is welded to the welding surface.
    The welded leg portion is provided with a continuous portion continuous with the design surface portion and a bent portion that is bent toward the outer peripheral side of the design surface portion with respect to the continuous portion and the tip portion is welded to the welded surface. Lighting equipment.
  2. 　前記連続部の前記意匠面部からの突出方向は熱板溶着において前記カバーが前記ランプハウジングに圧着されるときの圧着方向に対して３０度より大きくされた
    　請求項１に記載の車輌用灯具。     The vehicle lamp according to claim 1, wherein the protruding direction of the continuous portion from the design surface portion is made larger than 30 degrees with respect to the crimping direction when the cover is crimped to the lamp housing in hot plate welding.
  3. 　前記連続部と前記屈曲部の境界部分が屈曲端部として形成され、
    　前記屈曲部における前記先端部と前記屈曲端部を結ぶ方向が結び方向とされ、
    　前記結び方向が前記圧着方向に一致された
    　請求項２に記載の車輌用灯具。     The boundary portion between the continuous portion and the bent portion is formed as a bent end portion.
    The direction connecting the tip end portion and the bent end portion in the bent portion is defined as the knotting direction.
    The vehicle lamp according to claim 2, wherein the knotting direction coincides with the crimping direction.
  4. 　前記意匠面部の外周部が前記溶着脚部より外側に位置された
    　請求項１、請求項２又は請求項３に記載の車輌用灯具。     The vehicle lamp according to claim 1, claim 2 or claim 3, wherein the outer peripheral portion of the design surface portion is located outside the welded leg portion.
  5. 　内部空間を有し溶着面が形成されたランプハウジングに熱板溶着によって接合される車輌用灯具のカバーであって、
    　外面が車輌の外方を向く意匠面部と前記意匠面部から突出され前記溶着面に溶着される溶着脚部とが設けられ、
    　前記溶着脚部には、前記意匠面部に連続する連続部と、前記連続部に対して前記意匠面部の外周側に屈曲され先端部が前記溶着面に溶着される屈曲部とが設けられた
    　車輌用灯具のカバー。     A cover for vehicle lamps that is joined to a lamp housing that has an internal space and has a welded surface formed by hot plate welding.
    A design surface portion whose outer surface faces the outside of the vehicle and a welding leg portion which protrudes from the design surface portion and is welded to the welding surface are provided.
    The welded leg portion is provided with a continuous portion continuous with the design surface portion and a bent portion that is bent toward the outer peripheral side of the design surface portion with respect to the continuous portion and the tip portion is welded to the welded surface. Light fixture cover.
PCT/JP2020/022866 2019-06-21 2020-06-10 Vehicular lamp and cover for vehicular lamp WO2020255827A1 (en)

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