JPS6330711Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bonding structure between synthetic resin members. More specifically, a joint leg is formed on the periphery of one synthetic resin member, a joint groove is provided on the periphery of the other synthetic resin member, and a metal body is formed in a loop shape between the joint leg and the joint groove. The present invention relates to a bonding structure for mutually bonding synthetic resin members, in which the two members are melted and bonded by heating the metal body.

As shown in Fig. 1, a conventional rear endoscope for a vehicle is shown as an example of a joint structure between synthetic resin members.
The mirror body a was directly welded and joined to the decorative ring b, and the mirror c was fixed between them. In addition, in the same figure, d is packing. In this structure, in order to weld and join the mirror body A and the decorative ring B, it is necessary to weld and join the mirror body A and the decorative ring B from the outside of the decorative ring B using an ultrasonic horn e. The contact surface with the horn e was also melted, causing scratches that had to be repaired later. In addition, this cosmetic ring b cannot have a curved top surface because it requires a contact area with the ultrasonic horn e, and there are design limitations in order to make it easier to repair scratches. Ta.

In order to eliminate such defects, as shown in FIG. 2, a metal body 3 that generates heat by an external high-frequency induction coil 7 is disposed at the joint between the decorative ring 2 and the mirror body 1. A configuration has been proposed in which the bonded portions of both members are melted by induction heating, and the bonded portions are crimped using a pressure bonding mold 6 to bond the two members and to fix the mirror 4.

However, in such a joint structure, in order to strengthen the decorative ring 2 and the mirror body 1 over the entire circumference, it is necessary to arrange a metal body over the entire circumference of the joint. The metal body was formed into an endless loop shape that matched the shape of the joint.
That is, the metal body was formed into an endless loop by abutting both ends of a mild steel wire or the like, and fixing the abutted portions together by welding, brazing, or the like.

However, in such a joint structure between synthetic resin members using metal bodies, it may be difficult to insert the metal body formed in an endless loop shape depending on the mutual shape of the synthetic resin members. In particular, cracks may occur at the joint due to the difference in expansion and contraction between the metal body, which is a mild steel wire rod, and the synthetic resin member after heat fusion.

In view of the above-mentioned circumstances, the present invention has been developed in which synthetic resin members are joined together without causing any damage to the surfaces of the synthetic resin members at the time of joining, the joining process is extremely easy to handle, and there are no cracks or the like at the joint. It is an object of the present invention to provide a joint structure between synthetic resin members that does not cause the occurrence of.

Figures 3 and 4 show an example in which the present invention is applied to the joining of a mirror body and a decorative ring of a rear endoscope for a vehicle, in which 1 is a mirror body made of synthetic resin, and 2 is a mirror body made of synthetic resin. 3 is a soft steel wire used as a metal body, 4 is a mirror, 5 is a packing, 6 is a crimp type, and 7 is a high frequency induction coil.
The mirror body 1 has a peripheral connecting leg 11 and an inner rib 12, and the connecting leg 11 is connected to a groove provided in the decorative ring 2 with a loop-shaped mild steel wire 3 sandwiched therebetween. 21, and by this loose fitting, the mirror 4 and the packing 5 are connected to the rib 12 and the decorative ring 2.
It's sandwiched between them. The mild steel wire 3 used as the metal body consists of a pair of mild steel wires 31 and 32 arranged along the groove 21 formed on the periphery of the decorative ring 2. A fitting recess 33 for the mild steel wire 32 is formed. Therefore, each of the mild steel wires 31 and 32 is connected to the recess 3 of one of the mild steel wires.
The other mild steel wire 32 is slidably inserted into the soft steel wire 3 and placed with a portion 10 that wraps around each other at the junction of the mild steel wires 31 and 32.

A rear endoscope with the above configuration is attached to a crimp-type 6
Press the mirror body 1 onto the decorative ring 2 with the press button. A high frequency induction coil 7 is provided on the outer periphery of the decorative ring 2. When the high frequency induction coil 7 is driven in this state, as shown in FIG.
1 and the groove 21 of the decorative ring 2 are melt-bonded. By this fusion bonding, the mirror 4 is fixed to the mirror body 1 with the gasket 5 interposed therebetween. Therefore, the time required for complete adhesion to join and fix the two can be achieved almost instantaneously, and since the mild steel wire 3, which is a loop-shaped metal body, is buried in both joints so as to have an anchor effect, it is easy to machine. Moreover, since the loop-shaped mild steel wire 3 has a wrapped portion 10 at least in part, depending on the shape of the joint of the synthetic resin member, the wrapped portion 10 may be temporarily removed. The wrapped portion 10 of the mild steel wire 3 can move freely, so the synthetic resin after the synthetic resin members are heat-fused together can be easily placed in the joint groove by separating them. Even if there is a difference in expansion and contraction between the member and the mild steel wire 3, the risk of cracks occurring at the joint can be eliminated.

In addition, Fig. 6 A, B, and C show other examples of the wrapped portion 10 of the mild steel wire. A structure in which engaging uneven portions are formed and these are fitted together; C shows a structure in which a mild steel wire and metal foil are used, and in the wrapped portion, the mild steel wire is covered with metal foil; The same effect as the structure shown in one embodiment can be obtained.

In addition, in the above-mentioned Example, although the metal body which is a loop-shaped heating body was demonstrated by the mild steel wire 3, it is needless to say that this invention is not limited to this.

FIG. 7 shows a second embodiment of the present invention, in which a housing 20 of an automobile lamp is used as a synthetic resin member.
This figure shows a bonding structure between a lens (not shown) and a loop-shaped metal body made of mild steel wires 31 and 32 having a wrap portion 10 similar to that shown in FIGS. 3 and 4. 3 is formed, and the metal body 3 is disposed between the joint leg of the lens in a groove formed in the housing, and both ends are melted and joined by high frequency induction heating.

As described above, the joint structure of the synthetic resin members of the present invention includes a loop-shaped metal body interposed between the joint leg of one synthetic resin member and the joint groove of the other synthetic resin member. A joining structure of synthetic resin members in which metal bodies are melted and joined by induction heating, wherein the loop-shaped metal body has at least partially wrapped portions so that they can move with each other. Therefore, depending on the shape of the joint of synthetic resin members, it is possible to easily separate the lap part and place the metal body in the joint groove, and also to remove the plastic member after joining. It is possible to obtain a high-quality joint structure in which no cracks or the like occur in the joint due to the difference in expansion and contraction between the metal body and the metal body.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional rear endoscope for a vehicle, and FIG. 2 is a sectional view showing another embodiment of the conventional rear endoscope for a vehicle. FIG. 3 is a sectional view showing an embodiment of the present invention before bonding, FIG. 4 is a sectional view taken along line AA in FIG. 3, and FIG. 5 is a sectional view after bonding. 6A to 6C are a plan view and a sectional view showing another wrap structure of the present invention, respectively, and FIG. 7 is a plan view of the main part showing another embodiment of the present invention. 1... Mirror body made of synthetic resin, 2... Cosmetic ring made of synthetic resin, 3... Metal body, 4... Mirror,
5... Packing, 6... Crimp type, 7... High frequency induction coil, 10... Wrap part, 20... Housing of automobile lamp, 11... Joint leg, 21...
Joint groove.

Claims (1)

[Scope of utility model registration request] A metal body that loosely fits a joint leg formed on the periphery of one synthetic resin member into a joint groove formed on the periphery of the other synthetic resin member, and forms a loop between the joint leg and the joint groove. In the bonding structure between synthetic resin members, in which both synthetic resin members are melted and bonded by heating the metal body, the loop-shaped metal body is such that at least a portion thereof can be moved relative to each other. 1. A bonding structure between synthetic resin members, characterized in that the metal body has a lap portion wrapped in a metal body.