JPS6019306Y2 - Joint structure between insulating bushing and molded cone for lead wire - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint structure between an insulating bushing and a molded cone for the Hijiden line.

Generally, the insulating bushing and the molded cone for the guideline are joined by applying an epoxy adhesive to the joint surfaces to ensure airtightness. It leaks from the surface to the external bushing surface, spoiling the aesthetic appearance of the surface and reducing the product value.
Furthermore, it also poses a problem in maintaining dielectric strength.

Conventionally, the areas where the adhesive leaked were taped or the surface was treated with a volatile solvent such as thinner, but the work was troublesome.

In view of this point, the present invention aims to provide a joint structure that can prevent the adhesive from flowing out.Hereafter, one embodiment of the sunrise line part of a salt-resistant high-pressure shear switch will be described based on the drawings. I will explain.

1 and 2 show a first embodiment of the present invention, in which 1 is an insulating bushing attached to a switch (not shown), and 2 is a connecting fitting embedded in the insulating bushing 1. The connecting terminal 2a thereof protrudes outward from the insulating bushing 1.

3 is a mold cone for the Hiji Line made of ethylene propylene rubber that is joined to the insulating bushing 1; 4 is an eyeliner molded inside the mold cone 3; the conductor 5 is connected to the connection fitting 2; It is inserted into the terminal 2a and crimped.

Reference numeral 6 denotes a loose comb provided between the tip end surface of the conductor 5 and the inner end surface of the connecting terminal 2a of the connecting fitting 2.

Next, the joint structure between the mold cone 3 and the insulating bushing 1 will be described.

First, regarding the mold cone 3 side, 7 is a recess formed in an annular shape at the base end of the mold cone 3, leaving an outer edge 8 and a central protrusion 9, and both wall surfaces 10 of the recess are formed inwardly. It is formed in a tapered shape that gradually narrows toward the center.

A small protruding strip 11 is provided at the tip of the outer edge portion 8 in a protruding manner.

On the other hand, on the insulating bushing 1 side, reference numeral 13 is an annular protrusion provided on the head 14 of the insulating bushing 1, and both the inner and outer surfaces thereof are configured to fit into the recess 7.
It is formed in a tapered shape that gradually narrows toward the tip.

By fitting the protrusion 13 into the recess 7, the inner peripheral surface of the small protrusion 11 of the outer edge 8 and the head 1
A small annular gap 15 opened outward between the outer circumferential surface of 4 and
is formed.

In order to join the mold cone 3 and the insulating bushing 1 configured in this way, first, an adhesive is applied to each surface inside the recess 7 of the mold cone 3, and then the mold cone 3 and the insulating bushing are bonded together. It is sufficient if the fittings 1 and 2 are fitted together, but at the time of this joining, for example, a joining pressing force is applied in the direction indicated by the center mark P in FIG. 2.

Then, due to the action of this pressing force, some of the adhesive applied to each surface within the recess 7, especially the inner wall surface 1 on the outer edge 8 side.
A part of the adhesive applied to 0 is compressed and tends to flow outside.

However, as mentioned above, since the void 15 is formed by the small convex strip 11 provided on the outer edge 8 of the mold cone 3, the compressed adhesive is accumulated in the void 15 due to its viscosity, and the adhesive is no longer used. leakage to the outside is prevented.

Furthermore, when the adhesive applied to the inner wall surface 10 on the outer edge 8 side is compressed due to a difference in expansion coefficient between the two 1 and 3 due to thermal expansion, it also tries to flow out to the outside, but in the same way as above. It is stored in the void 15 to prevent it from dripping to the outside.

FIG. 3 shows another embodiment of the present invention, in which reference numeral 16 denotes a small annular recess formed on the outer surface of the head 14 of the insulating bushing 1; By fitting the recess 7 and the protrusion 13, approximately half of the mold cone 3 is covered by the tip of the outer edge 8.

Therefore, an annular gap 15 opened outward is formed between the inner circumferential surface of the tip of the outer edge portion 8 and the outer circumferential surface of the head 14. Similarly, the compressed adhesive is stored and prevented from flowing further to the outside.

As described in detail above, the present invention is such that the base end outer edge of the molded cone for the Hiji Line, which is joined to the head outer circumferential surface of the insulating bushing, is arranged so that its base end is along the outer circumferential surface of the insulating bushing. By forming a slight gap between the inner circumferential surface of the outer edge of the proximal end and the outer circumferential surface of the insulating bushing, it may be compressed when the insulating bushing and the mold cone are assembled, or may be compressed in the longitudinal direction due to differences in thermal expansion. Even when the mold cone is extended, the adhesive applied between the two is reliably collected in the gap, and dripping can be prevented.

Furthermore, even if there is a dimensional error in the length direction of the insulating bushing and the mold cone, a gap is reliably formed between the two, so the gap prevents further leakage to the outside, as described above, and as a result, It can prevent dripping,
This is a practically preferable joint structure between the insulating bushing and the molded cone for the Hijiden line.

It should be noted that the present invention can be applied not only to switches but also to cutout switches, transformers, and other sunrise wire parts of outdoor equipment.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of an embodiment of the present invention in the sunrise line part of a salt-resistant high-pressure gas-solid switch; Fig. 2 is an enlarged sectional view of the main part of Fig. 1; Fig. 3 is FIG. 7 is an enlarged sectional view of a main part of another embodiment of the present invention.

Claims (1)

[Claims for Utility Model Registration] 1. The proximal outer edge portion 8 of the molded cone 3 for the Hijiji Line, which is joined to the outer circumferential surface of the head 14 of the insulating bushing 1, has its proximal end attached to the outer circumferential surface of the insulating bushing 1. Joining of an insulating bushing and a molded cone for marking line, characterized in that the insulating bushing and the molded cone for marking line are arranged along the same line, and a slight gap 15 is formed between the inner circumferential surface of the base end outer edge portion 8 and the outer circumferential surface of the insulating bushing 1. structure. 2. A utility model registration claim characterized in that the void 15 is an outwardly open void formed by the protruding strip 11 protruding from the tip of the outer edge 8 and the outer circumferential surface of the head 14. A joint structure between the insulating bushing and the molded cone for marking line according to scope 1. 3 The gap 15 is formed between the tip of the outer edge 8 and the head 1.
4. The insulating bushing and the molded cone for eyeliner according to claim 1 of the utility model registration claim, characterized in that the space is an outwardly open space formed by a recess 16 formed on the outer peripheral surface of the bushing. Junction structure with.