JP4369928B2 - Manufacturing method of vehicle lamp cover, vehicle lamp cover, and vehicle lamp equipped with the same - Google Patents

Description

  The present invention relates to a method for manufacturing a vehicle lamp cover such as a side lamp or a vehicle width lamp that is attached to a large vehicle such as a truck, a trailer, a tank truck, a dump truck, etc., a vehicle lamp cover, and a vehicle equipped with the cover. It relates to lighting equipment.

  A large-sized vehicle such as a truck is provided with a side lamp and a vehicle width lamp (hereinafter collectively referred to as “vehicle lamp”) for displaying the vehicle width, side position, and the like. The vehicular lamp is useful for letting drivers of other automobiles recognize the size and width of the truck when driving at night or when stopping. A normal vehicular lamp has a main body to be attached to the automobile, a light source to be attached to the main body, and a cover that is attached to the main body and covers the light source, and a main body with a cover is attached to the automobile and light from the light source is transmitted through the cover to the outside The width, part, etc. of the automobile can be displayed by irradiating the vehicle.

  The vehicular lamp is difficult to confirm when it is dark, and when it is too bright, it may interfere with other drivers. A multilateral agreement of the European Economic Commission (ECE) signed in 1958 as one of the standards for the brightness of vehicular lamps. The adoption of uniform technical requirements for equipment and parts that can be installed or used in vehicles and the agreement on the conditions for mutual recognition of accreditation made based on these requirements "). Moreover, in Europe, it is mandatory to obtain equipment certification for equipment that is required for the certification of newly manufactured vehicles. In the mutual recognition agreement for type certification of vehicles, etc., this equipment certification is subject to mutual recognition. It has become. Many countries, including Japan and the EU member states, have joined this agreement. According to the agreement, the light distribution characteristic of the side lamp (SM1) is that the luminous intensity is 4.0 cd or more on the reference axis (center axis) of the cover, and the predetermined value of the side lamps other than on the reference axis. It must meet standards such as 0.6cd or more within the light distribution table (horizontal ± 45 °, vertical ± 10 °) and 25.0cd or less at any point in the light distribution table. Mandatory.

  However, this kind of vehicular lamp in Japan usually has a light distribution characteristic on the reference axis of the cover exceeding 30.0 cd to 50.0 cd, and many do not conform to the above agreement. For this reason, the current vehicle lamps and vehicles equipped with them cannot be exported to the member countries as they are.

  A vehicle lamp cover manufacturing method according to the present invention is a manufacturing method for manufacturing a vehicle lamp cover conforming to the agreement, and as described in claim 1, a main body attached to an automobile, a light source attached to the main body, In a method for manufacturing a vehicular lamp cover, which includes a cover that is attached to a main body and covers a light source, and is attached to an automobile and light from the light source passes through the cover and is irradiated to the outside to display the width, part, etc. of the automobile. Female molds and male molds are used as molds for molding, and both or one of the inner peripheral surface front end side central part and the male outer peripheral surface front end center part of the female mold is roughened. A cover provided with a dimming portion roughened on both or either one of the inner peripheral surface front end side central portion and the outer peripheral surface front end side central portion is supplied into the molding space between the male molds. This is a molding method.

  The vehicle lamp cover of the present invention is a cover that complies with the above-mentioned agreement, and includes a main body attached to an automobile, a light source attached to the main body, and a cover attached to the main body and covering the light source. In a vehicular lamp cover that displays the width, part, etc. of an automobile when light from a light source passes through the cover and radiates to the outside, the cover gradually becomes thinner from the mounting side to the front end side It is substantially hemispherical, and has a light-reducing portion roughened so that light from the light source can be reduced on both or one of the inner and outer surfaces of the tip. In this case, according to a third aspect of the present invention, in the cover, the dimming section can emit the light distribution characteristic on the reference axis that is dimmed to a brightness of 4.0 cd to 25.0 cd.

  According to a fourth aspect of the present invention, there is provided a vehicular lamp in which the vehicular lamp cover is mounted on a main body mounted on an automobile.

  The vehicle lamp cover manufacturing method of the present application uses a female mold and a male mold as cover molding molds, and both the inner peripheral surface front end side central portion of the female mold and the male outer peripheral surface front end side central portion or Since one side is roughened and a molten raw material such as glass or resin is supplied into the molding space between the two molds, the inner peripheral surface tip side central portion is automatically A cover having a rough surface is formed on both or any one of the central portions on the front end side of the outer peripheral surface, and the cover having a stable surface quality can be produced by uniforming the roughness of the rough surface, the formation location, and the like.

The vehicular lamp cover and the vehicular lamp provided with the vehicular lamp cover of the present application have the following effects.
(1) Since the rough surface part which can attenuate the light from a light source is provided in both or one of the inner surface and outer surface of a cover front-end | tip part, the light from a light source can be attenuated and can be radiate | emitted.
(2) Since the rough surface portion has a light distribution characteristic on the reference axis of the cover that is reduced to a brightness of 4.0 cd to 25.0 cd and is emitted, the vehicular lamp using the cover and its vehicle Cars equipped with lighting equipment can be exported to the member states without violating the international agreement.

(Embodiment 1 of vehicle lamp cover manufacturing method)
An example of an embodiment of a method for manufacturing a vehicular lamp cover according to the present application will be described with reference to FIG. The embodiment of FIG. 1 is an example in the case of taking two resin covers (molding two at the same time). In this manufacturing method, the female mold 1 and the male mold 2 are opposed to each other, a molding space 3 is provided between both molds, and molten resin (cover raw material) is supplied from the injection hole 4 of the mold 1.

  In this embodiment, as shown in FIG. 4, a cover 7 having a light-reducing portion 9, 10 which is roughened on both the front end side central portion of the inner peripheral surface 5 and the front end side central portion of the outer peripheral surface 6. 4), the inner peripheral surface 11 of the female mold 1 (FIG. 1) has the same shape as the outer peripheral surface 6 of the cover 7 to be molded, and the outer peripheral surface 13 of the male mold 2 (FIG. 1). ) Is the same shape as the inner peripheral surface 5 of the cover 7.

  The dimensions of the inner peripheral surface 11 of the female mold 1 and the outer peripheral surface 13 of the male mold 2 are set so that the width of the molding space 3 formed therebetween is the same as the thickness of the cover 7 to be molded. ing. Further, a rough surface portion 12 is formed at the front end side central portion (FIG. 1) of the inner peripheral surface 11 of the female mold 1, and a rough surface portion 14 is formed at the front end side central portion (FIG. 1) of the outer peripheral surface 13 of the male mold 2. Are formed on both the front end of the inner peripheral surface 5 and the front end of the outer peripheral surface 6 of the cover 7 (FIG. 4) to be molded. It is made to do. The light distribution characteristics on the reference axis of the cover are 4.0 cd to 25.0 cd for the roughness, density, depth, rough surface formation range, and the like of the rough surfaces of the light reducing portions 9 and 10. Further, the cover 7 is designed so that the light distribution characteristic other than on the reference axis (other than the front end central portion 8) is 0.6 cd or more.

  In this embodiment, by supplying molten resin (cover raw material) from the injection hole 4 of the female mold 1 into the molding space 3, a cover having the same shape, size and thickness as the molding space 3 is molded. At the same time, the rough surface portion 12 of the inner peripheral surface 11 of the female mold 1 and the rough surface portion 14 of the outer peripheral surface 13 of the male mold 2 are used to reduce the light on both the front end portion of the inner peripheral surface 5 and the front end portion of the outer peripheral surface 6 of the cover 7. 9, 10 (FIG. 4) are formed. For example, a thermoplastic resin or a UV curable resin can be used as the resin.

  The rough surface portion 12 of the female mold 1 and the rough surface portion 14 of the male mold 2 are formed by fine concavo-convex of, for example, μ units by sandblasting or other methods.

(Embodiment 2 of vehicle lamp cover manufacturing method)
In the case of forming the light-reducing portion 10 roughened only in the central portion on the front end side of the outer peripheral surface of the cover 7, the female die 1 having the roughened inner peripheral surface 11 is used, and the outer surface of the male die 2 is used as the male die 2. 13 is not roughened. On the contrary, when the light-reducing portion 9 having a roughened surface is formed only in the central portion on the front end side of the inner peripheral surface of the cover 7, the female die 1 whose inner peripheral surface 11 is not roughened is used. A male mold 2 having a roughened outer peripheral surface 13 is used.

(Embodiment 3 of vehicle lamp cover manufacturing method)
This embodiment is an example in the case of forming a glass cover. In this case, as shown in FIG. 2, molten glass is put into the female mold 1 and the glass is pushed by the male mold 2 so that the cover is molded in the molding space formed between the female mold 1 and the male mold 2. It is. The female mold 1 and the male mold 2 in FIG. 2 are formed in the same manner as those in FIG. 1, and the inner peripheral surface of the female mold 1 has the same shape as the outer peripheral surface 6 of the cover 7 to be molded. The surface 13 (FIG. 2) has the same shape as the inner peripheral surface 5 of the cover 7.

  The dimensions of the inner peripheral surface 11 of the female mold 1 and the outer peripheral surface 13 of the male mold 2 are the same as the female mold 1 and male mold 2 of FIG. 7 is set to have the same width as the wall thickness of 7. Further, a rough surface portion 12 is formed at the front end side central portion (FIG. 2) of the inner peripheral surface 11 of the female mold 1, and a rough surface portion 14 is formed at the front end side central portion (FIG. 2) of the outer peripheral surface 13 of the male mold 2. Are formed on both the front end of the inner peripheral surface 5 and the front end of the outer peripheral surface 6 of the cover 7 (FIG. 4) to be molded. It is made to do. The roughness, density, depth, rough surface formation range, etc. of the light-reducing portions 9 and 10 are arranged on the reference axis of the cover in the same manner as the cover formed by the female mold 1 and male mold 2 in FIG. The optical characteristics are set to 4.0 cd to 25.0 cd. Further, the cover 7 is designed so that the light distribution characteristic other than on the reference axis (other than the front end central portion 8) is 0.6 cd or more. As the glass, for example, soda glass, lead glass, borosilicate glass, or the like can be used.

(Vehicle lamp cover embodiment 1)
An example of an embodiment of the vehicular lamp cover of the present application will be described with reference to FIGS. The vehicular lamp cover 7 is the same as or similar to the conventional vehicular lamp cover of this type, and has a shape and size close to that. Light emitted from the light source 15 (FIG. 3) is perpendicular to the front end surface of the light source (vertical direction). ) Within 10 ° and within 45 ° in the horizontal direction (left-right direction), the shape is substantially hemispherical and gradually decreases from the mounting portion 16 side toward the tip portion 17. Also, the inner peripheral surface of the cover 7 is bent at regular intervals to form a large number of narrow surfaces 18 in the vertical direction, and concentrically from the distal end portion 17 to the mounting portion 16 side at the central portion on the distal end side of the inner peripheral surface 5. An expanding ring-shaped step surface 19 is formed, and the step surface 19 and the outer peripheral surface thereof are roughened to form the light reducing portions 9 and 10.

  The dimming units 9 and 10 are designed so that the light distribution characteristic on the reference axis of the cover is in the range of 4.0 cd to 25.0 cd. Further, the cover 7 is designed so that the light distribution characteristic other than on the reference axis (other than the front end central portion 8) is 0.6 cd or more.

  The dimming portions 9 and 10 are not limited to fine irregularities. In the case where the cover 7 is made of glass, the dimming portions 9 and 10 can be made in a state of frosted glass, tempered glass, or the like to have a dimming function.

  The vehicular lamp cover shown in FIGS. 3 to 5 has a flange 21 formed on the side opposite to the tip end portion 17 and a mounting portion 16 formed outside thereof. The mounting portion 16 has a cover-side screw 22 formed on the outer peripheral surface of the cylindrical portion 20, and the cover-side screw 22 can be screwed into the body-side screw 24 of the resin-made main body 23. A metal ground plate 26 is fixed to the bottom inner side 25 of the main body 23 with mounting screws 27, and a socket 28 is attached to the ground plate 26 so that the light source 15 can be attached to and detached from the socket 28. The light source 15 can be a light emitting diode or the like.

(Vehicle lamp cover embodiment 2)
A main body 23 shown in FIG. 5 has a ring-shaped cover socket 28 integrally formed with an L-shaped vehicle body attachment plate 29 and resin so that the vehicle body attachment plate 29 can be attached to an automobile.

(Vehicle lamp cover embodiment 3)
The vehicle lamp cover 1 may have any shape or structure as long as it satisfies the light intensity standard and angle standard of the agreement.

(Embodiment of vehicle lamp)
The vehicle lamp of the present invention is obtained by mounting the above-described vehicle lamp cover of the present invention on the main body 23 of FIGS. The shape and structure of the main body 23 can be changed according to the shape and structure of the mounting portion 16 of the cover 7. The main body 23 may have other shapes and structures of conventionally used vehicle lamps. The vehicular lamp can be attached to the side of a large vehicle such as a truck, a trailer, a tank lorry, a dump truck, or the like as a vehicle width lamp or a parking lamp.

(Industrial application fields)
The vehicular lamp cover of the present invention can be used not only as a side lamp or a width lamp, but also as a parking lamp or other vehicular lamp cover, and a parking lamp or a vehicular lamp fitted with the cover can be used for each purpose. It can also be used in a field that suits your needs.

Explanatory drawing of an example of the female type | mold for resin molding used for the manufacturing method of the lamp cover for vehicles of this application, and a male type | mold. Explanatory drawing of an example of the female type | mold for glass forming used for the manufacturing method of the lamp cover for vehicles of this application, and a male type | mold. The perspective explanatory view of an example of the embodiment of the vehicular lamp cover of this application. Sectional drawing of an example of embodiment of the vehicle lamp cover of this application. The perspective explanatory view of an example of the embodiment of the vehicular lamp cover of this application.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Female type 2 Male type 3 Molding space 4 Injection hole 5 Cover inner peripheral surface 6 Cover outer peripheral surface 7 Cover 8 Cover front-end | tip center part 9 Cover inner peripheral surface light-reducing part 10 Cover outer peripheral surface light-reducing part 11 Female Inner peripheral surface of the die 12 Rough surface portion of the inner peripheral surface of the female die 13 Outer peripheral surface of the male die 14 Rough surface portion of the outer peripheral surface of the male die 15 Light source 16 Cover mounting portion 17 Tip portion of the cover 18 Narrow surface 19 Stepped surface 20 Cylinder Part 21 鍔 22 Cover side screw 23 Main body 24 Main body side screw 25 Inside bottom surface of main body 26 Ground plate 27 Mounting screw 28 Socket 29 Car body mounting plate

Claims (4)

  It has a main body to be attached to the automobile, a light source to be attached to the main body, and a cover that is attached to the main body and covers the light source. In the vehicle lamp cover manufacturing method to be displayed, a female mold and a male mold are used as a cover molding mold, and both or one of the female mold inner peripheral surface front end side central portion and the male outer peripheral surface front end side central portion is used. The raw material is supplied into the molding space between the female mold and the male mold, and the inner peripheral surface front end side central portion and the outer peripheral surface front end side central portion are roughened. A method for manufacturing a vehicular lamp cover, comprising forming a cover having a dimmed surface portion.   A main body to be attached to the automobile, a light source to be attached to the main body, and a cover that is attached to the main body and covers the light source, and is attached to the automobile and light from the light source passes through the cover and radiates to the outside. In the vehicular lamp cover, the cover has a substantially hemispherical shape that gradually becomes thinner from the mounting side to the front end side, and the light from the light source is attenuated on both or one of the inner and outer surfaces of the front end. A vehicular lamp cover, characterized in that a light reduction portion roughened so as to be formed is formed.   3. The vehicular lamp cover according to claim 2, wherein the light-reducing portion has a light distribution characteristic on the reference axis having a roughness emitted by being reduced to a brightness of 4.0 cd to 25.0 cd. Lamp cover. 4. A vehicular lamp, comprising: the vehicular lamp cover according to claim 2 or 3 attached to a main body attachable to an automobile.

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