JPH071769Y2 - Transformer wire attachment structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a structure for mounting an electric wire led out from a transformer.

[Prior Art] Conventionally, for example, in a neon transformer or the like, a filling material is poured into the case to fix the transformer body or the like disposed therein and to insulate the case. Then, the electric wire is led out from the inside of the case through the bushing, but since a gap is formed between the bushing and the electric wire, there is a problem that the filler flows out from the gap to the outside.

Therefore, conventionally, as shown in FIG. 8, a binding band 21 is wound around the tip of the electric wire 20 before the bushing 22 is attached to the case, and an insertion hole 23 of the bushing 22 for insulating the case 20 from the electric wire 20 is provided. Wire 20 is inserted through. And
The electric wire 20 is held by the bushing 22 by abutting and locking the tapered surface 24 of the insertion hole 23 and the binding band 21, and in this state, the electric wire 20 and the bushing are held by the holding table 25.
22 was placed, and a sealing agent 26 such as putty was filled in the tapered surface 24 of the bushing 22 and cured. After the sealant 26 is hardened, it is attached to the case to ensure airtightness inside the case.

[Problems to be solved by the invention] However, when the sealing agent 26 is packed, the sealing agent 26
However, there is a problem in that it takes a long time to assemble the transformer, because it has to be left until it hardens.
In addition, the sealing agent 26 is not sufficiently packed and does not reach the inside of the insertion hole 23 of the bushing 22 sufficiently, on the contrary, the sealing agent 26 flows out of the case, or the sealing agent 26
There was a problem of compatibility with the filler in the case.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transformer wire mounting structure that facilitates the assembly work of a transformer in a short time and ensures that the filler does not flow out of the case. .

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a ring-shaped elastic member for an electric wire in an electric wire mounting structure in which the electric wire is led out of a transformer case through an insulating member. While tightly fitting and inserting the electric wire into the through hole of the insulating member attached to the case, the elastic member is brought into contact with the inner peripheral surface of the through hole, and the elastic member is inserted into the insulating member. The point is that it is closely attached to the peripheral surface.

[Operation] With the above configuration, when the ring-shaped elastic member that is tightly fitted and attached to the electric wire comes into contact with the inner peripheral surface of the insulating member, the elastic member comes into close contact with the insulating member and between the insulating member and the electric wire. Is hermetically sealed.

[Embodiment] An embodiment in which the present invention is embodied in a high frequency neon transformer will be described below with reference to FIGS.

As shown in FIGS. 1 (a), (b) and FIG. 2, a transformer block circuit 2 is arranged inside the case 1 of the neon transformer Tr. A pair of output lead wires 3 as electric wires are connected to the transformer block circuit 2, and the output lead wires 3 are led out from the case 1 to the outside. In addition,
Reference numeral 4 is an input lead wire connected to the transformer block circuit 2, and is adapted to be supplied with commercial power.

The output lead wire 3 is composed of a first covering member 3a for covering the conductive wire D and a second covering member 3b for covering the covering member 3a. In order to insulate the output lead wire 3 from the case 1, the output lead wire 3 is inserted into a bushing 5 as an insulating member that projects outward from one side surface of the case 1.

The bushing 5 has a small-diameter portion 5a which is inserted from the outside of the case 1 into a mounting hole 6 which is provided on one side surface of the case 1.
And a large-diameter portion 5b protruding outside the case 1. Further, a pair of protrusions 7 arranged opposite to each other by 180 degrees are provided on the outer periphery of the small diameter portion 5a. Further, an insertion hole 8 for inserting the output lead wire 3 is formed at the center of the bushing 5, and the small diameter portion 5a is provided from the center thereof.
A tapered surface 9 is formed so as to expand slightly toward the side.

As shown in FIG. 1B, the bushing 5 has a mounting hole 6
The protruding portion 7 of the small diameter portion 5a is correspondingly inserted into the notched concave portion 6a provided in the opposite direction of 180 °, and the bushing 5 cannot be detached from the case 1 by the protruding portion 7 by rotating thereafter. ing. Reference numeral 10 denotes an elastic seal ring fitted in the small diameter portion 5a, which is interposed between the outer side surface of the case 1 and the large diameter portion 5b of the bushing 5 to keep the mounting hole 6 airtight. It is like this.

A packing 11 as a ring-shaped elastic member is tightly fitted to the output lead wire 3 corresponding to the tapered surface 9 of the bushing 5. As shown in FIG. 4, the packing 11 is formed in a short cylindrical shape, and a contact hole 12 for inserting the output lead wire 3 is formed in the center thereof. An arc portion 13 for smoothly inserting the packing 11 into the tapered portion 9 of the bushing 5 is formed on the outer periphery of one side surface 11a (right side in FIG. 4) of the packing 11.

Further, when the packing 11 is tightly fitted and attached to the output lead wire 3, it has a flat plate shape as shown in FIG.
When an external force is applied in the P arrow direction from this state, that is, the unused state, the contact hole 12 is easily rotated in the Q arrow direction around the A portion as a fulcrum, and is deformed as shown in FIG. As a result, the packing 11 that comes into close contact with the output lead wire 3
The inner peripheral surface of the contact hole 12 is substantially orthogonal to the output lead wire 3. Further, when the packing 11 is deformed, the expansion and contraction of the packing 11 causes one side surface 11 of the packing 11 to move.
a has a tapered shape and is in close contact with the tapered surface 9 of the bushing 5.

In addition, 14 is a binding band attached to the first covering member 3a of the output lead wire 3 in the case 1, and
This is to prevent the retainer from being removed from the case 1.

The operation of the mounting structure of the output lead wire 3 configured as described above will be described.

First, only the second covering member 3b at one end of the output lead wire 3 to be inserted into the case 1 is removed to expose the exposed first covering member 3b.
The binding band 14 is wound around 3a and fixed by tightening. Next, the side of the arc 11 of the packing 11 is set in the direction opposite to the direction in which the binding band 14 is provided, and the contact hole of the packing 11 is made.
Insert the other end of the output lead wire 3 into 12. Then, the packing 11 is brought close to the binding band 14 side.

Next, the other end of the output lead wire 3 is inserted from the tapered surface 9 side of the bushing 5, and the output lead wire 3 is moved so that the packing 11 is disposed inside the tapered surface 9 of the bushing 5. Then, the arc portion 13 of the packing 11 abuts on the tapered surface 9 of the bushing 5, and the packing 11 is easily rotated in the Q arrow direction (see FIG. 4) around the portion A of the contact hole 12. As a result, the contact hole 12 is separated from the outer peripheral surface of the output lead wire 3 and becomes in an orthogonal state (see FIG. 3).

The packing 11 has a tapered side surface 11a due to the expansion and contraction of the packing 11. Since the one side surface 11a having the tapered shape is closely fitted and abutted along the tapered surface 9 of the bushing 5, the airtightness between the output lead wire 3 and the insertion hole 8 of the bushing 5 is maintained. Further, the output lead wire 3 is supported in a stable state by the bushing 5 via the packing 11.

In this state, the small-diameter portion 5a of the bushing 5 is inserted into the mounting hole 6 of the case 1, and the protrusion 7 is inserted into the notch recess 6a.
The seal ring 10 keeps the mounting hole 6 airtight while it is locked to the inner surface. Then, after connecting the conductive wire D of the output lead wire 3 to the transformer block circuit 2, a filling material (not shown) flows into the case 1. At this time, since the packing 11 maintains close contact between the tapered surface 9 of the bushing 5 and the output lead wire 3, it is possible to prevent the filler from flowing out from the insertion hole 8 of the bushing 5.

When the packing 11 rotates around A and returns to its original position due to its own elastic force, one side surface 11a of the packing 11 makes sliding contact with the tapered surface 9, and the packing 11 is pressed by the bushing 5 due to the frictional force generated therebetween. It does not easily come out of the insertion hole 8 of the.

As a result, even if the output lead wire 3 is moved by mounting the bushing 5 on the case 1 and moving the output lead wire 3, the output lead wire 3 does not easily come off from the bushing 5. Therefore, it is possible to reliably prevent the filler from flowing out of the case 1 due to the airtightness of the packing 11.

Further, since the bushing 5 can be attached to the case 1 immediately after the output lead wire 3 is attached to the bushing 5, the assembly work time can be shortened and the work process can be simplified. .

The packing 11 can be used by inserting the packing 11 into the output lead wire 3 so that the one side surface 11a of the packing 11 is arranged in an opposite manner to that of this embodiment.

The present invention is not limited to the above-described embodiment, but may be modified as follows within the scope of the invention.

(1) Form the packing 11 into a trapezoidal cross section as shown in FIG.

(2) As shown in FIG. 6, the arc portion 13 of the packing 11 should be made gentler than in the above embodiment.

(3) As shown in FIG. 7, a circumferential projection 15 should be formed on one side of the packing 11.

[Effects of the Invention] As described in detail above, according to the present invention, the elastic member is mounted in close contact with the inner peripheral surface of the insulating member, so that the electric wire and the insulating member can be easily hermetically sealed. Even if the filling material is injected into the transformer case, it is possible to reliably prevent the filling material from flowing out from the part where the electric wire is led out. There is an effect that it is not necessary to fill in advance with a sealing agent or the like, and the work time can be shortened and simplified.

[Brief description of drawings]

FIG. 1 (a) is a schematic view showing a state in which an output lead wire is attached to a case of a neon transformer, FIG. 1 (b) is an explanatory view showing a state in which a bushing is locked to the case, and FIG. Is a partially enlarged sectional view showing a state where the output lead wire is attached to the bushing, FIG. 3 is a sectional view showing a shape of the packing in use, and FIG. 4 is a sectional view showing a shape of the packing before use. FIG. 5 is a sectional view showing another example of the trapezoidal packing, FIG. 6 is a sectional view showing another example in which an arc portion is formed on one side of the trapezoidal packing, and FIG. 7 is shown on one side of the packing. Sectional drawing which shows another example which formed the protrusion, FIG. 8 is explanatory drawing which shows a prior art example. 1 ... Case, 3 ... Output lead wire as electric wire, 5 ...
… Bushings as insulating members, 11 …… Packings as elastic members, Tr …… Transformers.

Claims (1)

[Scope of utility model registration request] 1. An electric wire mounting structure in which an electric wire is led to the outside of a transformer case through an insulating member. An insulating member attached to the case while a ring-shaped elastic member is tightly fitted to the electric wire. Of the electric wire for a transformer, wherein the elastic member is brought into contact with the inner peripheral surface of the through hole by inserting the electric wire into the through hole of Mounting structure.