JPH0658321U - Weld structure of front glass - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a welded structure in which the welded portion with the member to be welded seen through the front glass does not become cloudy in the welded structure of the front glass, and its appearance does not differ from other portions. The purpose is to do. [Structure] Front glass 1 to be fitted to the dial 2
Both parts are ultrasonically welded in a state in which the same black colored layer 4 as the facing 2 is previously formed on the end face 1c of the above. As a result, even if the bubbles 3 are generated in the welded portion, these are covered with the colored layer 4, and the welded portion viewed through the front glass 1 is uniform like other non-welded portions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a welding structure between a transparent resin member (hereinafter referred to as a front glass) that is arranged in the front part of an instrument such as a tachometer or a speedometer of an automobile and a material to be welded such as an instrument panel. It relates to a welded structure of a front glass such that the appearance of the welded portion is similar to that of other non-welded portions.

[0002]

[Prior art]

 For example, tachometers and speedometers installed on the dashboard of automobiles are mainly composed of an instrument panel called "backdoor" and a front glass arranged in front of the instrument panel and made of a transparent resin material. In this system, both parts are assembled and ultrasonically vibrated, and the generated heat melts part of the front glass to achieve integration.

FIG. 4 is a schematic view of a dashboard unit assembled by the above-mentioned welding method as seen from the front, in which 11 is a front glass and 12 is a back (welded member). 5A and 5B show cross sections of the front glass 11 and the member to be welded 12 before and after welding, respectively. The front glass 1 fitted in the recess 12a of the member to be welded 12 is shown in FIGS. A protrusion 11a called a director, which serves as a melting margin, is formed at the tip of the peripheral edge of the, and the protrusion 11a is melted to be integrated with the welded member 12.

As described above, in order to make it easier for the driver to see the gauges, the veneer constituting the dashboard or the like is usually colored with black (or a blackish color) or the resin itself is black. Formed of material, the driver will see this instrument panel through a transparent front glass.

[0005]

However, in the case where the transparent resin material and the member to be welded of a specific color are partially melted and integrated as described above, when the resin material is partially melted, the joint portion between the materials is melted. Bubbles are generated (see Fig. 6), and the peripheral edge of the facing sheet viewed through the front glass is partially clouded only at the welded part, and is not uniform with other peripheral parts as shown by the shaded area in Fig. In some cases, the product value as a card may be significantly reduced.

In view of the above-described problem of the welded structure of the transparent resin material and the member to be welded, the present invention has the color of the welded portion seen through the entire transparent resin material that has been welded to the other contact points. The purpose is to provide a welded structure of the front glass that looks the same as the part.

[0007]

[Means for Solving the Problems]

 According to the present invention to achieve the above object, at least a part of a transparent resin member is melted, and a member of a specific color to be welded and the resin member are integrally bonded through the melting portion to form a front glass welding structure. The front glass welding structure is characterized in that at least a portion of the transparent resin member, which is to be a molten portion, is subjected to a coloring treatment substantially the same as the color of the member to be welded prior to the melting to perform the fusion bonding. Will be provided.

[0008]

[Action]

 By applying a coloring treatment that is almost the same as the color of the material to be welded to the part that will become the melted part of the transparent resin member, even if bubbles are generated in the welded part during welding, the bubbles will be hidden by the colored layer and you will see through the transparent resin member. The welded part does not appear white.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial sectional view of an automobile tachograph as an example of a front glass welding structure according to the present invention, in which reference numeral 1 is a front glass made of a transparent resin material, and 2 Indicates a black member to be welded (hereinafter referred to as "end piece 2"), and the figure shows the state before welding of these materials.

A recess 2a is formed at the end edge of the dial 2 for mounting instruments (not shown), and when assembling the front glass 1 and the dial 2, the peripheral portion of the front glass 1 is fitted to the recess 2a. 1a will be fitted.

A projection 1b called a director is provided at the tip of the front glass peripheral portion 1a, which is melted during ultrasonic welding and serves to fix both parts.

In the front glass 1 configured as described above, according to the present embodiment, the same color as the dial 2 (usually normal) is provided on the front glass weld end face 1c including the protrusion 1b described above. , Black) is applied. This coloring treatment may be performed by applying (painting) a paint on the front glass end face 1c prior to the above-mentioned ultrasonic welding, or by performing a printing treatment (or stamp) of a specific color.

FIG. 2 is a cross-sectional view showing a joined state after the ultrasonic welding of the front glass 1 and the end piece 2 which have been colored as described above, and FIG. 3 is a circular frame of FIG. The part is enlarged.

According to the present embodiment, however, as described above, when the front glass 1 and the end piece 2 are welded, the front glass 1 is subjected to the same coloring treatment as the end piece 2 in advance, so that the front glass 1 is temporarily obtained. Even if a large number of bubbles 3 are generated at the joint portion of the end face 2, as shown in FIG. 3, the bubbles 3 are covered by the colored film (colored layer) 4 on the end face 1c of the front glass, and the visible side indicated by the arrow in the figure. From the above, the welded surface looks almost the same color as the end face 2.

As a result, it is possible to eliminate the clouding of the welded portion as seen in the conventional ultrasonic welding, the appearance of the welded portion is improved, and the commercial value can be further enhanced.

The welding structure of the front glass according to the present invention has been described above with reference to a tachograph which constitutes a dashboard of an automobile, but the present invention is not limited to this embodiment, and a transparent material is used. It can be applied to any product as long as it is an assembly which is joined to a member to be welded of a specific color and can be seen through the transparent material in use.

Further, in the embodiment, the welded portion of the front glass 1 to be ultrasonically welded is colored, but the entire contact portion with the member to be welded may be colored.

[0019]

[Effect of device]

 As described above, according to the present invention, even if bubbles are generated between the two members, the transparent resin member is subjected to the coloring treatment that is substantially the same as the color of the member to be welded, which is to be the melting portion. Bubbles are hidden by the colored layer, and the welded part seen through the transparent resin member has almost the same color as the other contact parts that are not welded, so the appearance of the welded assembly is not damaged and the product value can be increased. .

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a front glass and a facing glass before welding, which constitutes a front glass welding structure according to the present invention.

FIG. 2 is a partial cross-sectional view showing a state after welding of both parts shown in FIG.

FIG. 3 is an enlarged view of a portion inside a circular frame of FIG.

FIG. 4 is a schematic front view of a single dashboard to which the present invention is applied.

FIG. 5 is a partial cross-sectional view showing a conventional welding structure of a front glass constituting a dashboard and an end plate, FIG. 5A showing a state before welding and FIG. 5B showing a state after welding.

6 is an enlarged view of a portion inside the circular frame shown in FIG. 5 (b).

[Explanation of symbols]

 1 Front glass (transparent resin member) 2 Inside (weld member) 3 Bubbles 4 Colored layer

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[Procedure amendment]

[Submission date] July 9, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (4)

[Scope of utility model registration request] 1. A front glass welding structure in which at least a part of a transparent resin member is melted, and a member to be welded of a specific color and the resin member are integrally bonded to each other through the melting portion. Prior to the melting, at least a portion to be a melting part of the front glass is subjected to a coloring treatment which is substantially the same as the color of the member to be welded to be melt-bonded to each other. 2. The welded structure for a front glass according to claim 1, wherein the coloring treatment is coloring by painting or printing. 3. The front glass welding structure according to claim 1 or 2, wherein the member to be welded is an instrument panel constituting a vehicle dashboard. 4. The front glass welding structure according to claim 1, wherein the transparent resin member and the member to be welded are integrated by ultrasonic welding.