JPH0154821B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a multi-circuit branch body in which a rod-shaped connecting conductor is skewered with a plurality of branch bodies provided with multi-polar ring drive contacts on the inner periphery of a through hole. This relates to conductors for use.

(Prior Art) Some multi-circuit branch bodies have one end of a plurality of branch bodies attached to a rod-shaped connecting conductor to form a skewer shape, and branch cables are led out from each of these branch bodies.

When attempting to maintain the insulation of each of these branch bodies at a short creepage distance, a method of pressurizing the creepage surface is used.

These pressures are applied by bolts and nuts provided outside the branch bodies or connecting conductors forming a tightening part, and by tightening the tightening part, pressure is applied to the creeping surfaces (contact surfaces) of the insulating parts of each of the plurality of branch bodies.

(Problems to be Solved by the Invention) However, such a system in which the tightening portion is provided externally has the disadvantage that the structure becomes large and that the bolt cannot withstand long-term use due to rusting and the like.

(Means for Solving the Problems) Accordingly, the present invention provides a conductor for a multi-circuit branch body, in which a spring is provided inside the conductor, and the insulating creeping surface of each branch body is pressurized by the spring.

The specific structure of the present invention is to slidably insert a mandrel protruding from the inside of a female cap into a hole bored in one end surface of a rod-shaped connecting conductor, and apply a force that constantly draws this mandrel into the hole. A biasing spring spring is provided in the hole, a multipolar ring drive contact is provided on the inner periphery of the through hole, and the connection is made to each of the through holes of a plurality of branch bodies having a connecting portion for connecting a branch cable at one end. This is a multi-circuit branch conductor in which each contactor is brought into contact with a connecting conductor through a conductor, and a male cap is screwed onto the other end of the connecting conductor by press-contacting the female cap and each branch.

(Function) The female cap is biased inwardly into the connecting conductor by a spring spring provided in the hole of the mandrel, and the male cap is screwed and fastened to the other end of the connecting conductor. Therefore, each of the plurality of branch bodies covered on the outer periphery of the connecting conductor between the female cap and the male cap is held between the female cap and the male cap, and the insulating creeping surface of each branch body is pressure-welded. are doing. Moreover, since each branch body has one end pivotably attached to the outer periphery of the connection conductor, each branch body can be rotated and fixed at a desired position.

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

1 is a rod-shaped connecting conductor, 2 is a cylindrical hole bored in one end surface of this connecting conductor 1, 3 is a mandrel slidably inserted into this hole 2, and a flange 4 is attached to one end of this mandrel 3. It is attached with screws 5. 6 is a flange fitted on the outer periphery of the other end of this mandrel 3; 7 is a spring spring provided on the outer periphery of the mandrel 3 between this flange 6 and the flange 4; 8 is the connecting conductor 1;
These screws 8 are screwed into screw holes 9 from opposite sides of one end, and each of these screws 8 locks the outside of the flange 6. As a result, the mandrel 3 is urged toward the inner part of the hole 2 by the force of the spring spring 7. 10 is a screw hole drilled in the end face of the mandrel 3 on the open end side of the hole 2; 11 is a substantially disk-shaped fixing washer; a screw 12 is passed through the center hole of the fixing washer 11; Screws 13 are passed through several holes drilled at regular intervals, and each of these screws 1
3 is in the opposite direction to the screw 12. Reference numeral 14 designates pressing washers protruding from the outer peripheral edge of the fixing washer 11, excluding the 13 screws, at intervals.
0 and when the fixed washer 11 is brought into contact with the end of the mandrel 3, the pressing washer 14 avoids the head of the screw 8 and projects to the outer periphery of the connecting conductor 1. Reference numeral 15 denotes a fixing metal fitting having a recess 15a on one side.A groove 16 is bored in the center of the bottom of the recess 15a, and several screw holes 1 are inserted around the periphery.
The fixing washer 11 was fitted into the recess 15a, the head of the screw 12 was inserted into the groove 16, each screw 13 was screwed into the screw hole 17, and the fixing metal fitting 15 was fixed to the fixing washer 11. It is something. Reference numeral 18 denotes an insulating layer integrally molded around the outer periphery of the fixture 15, and this outer periphery is sequentially covered with a conductive layer 19 and a shield jacket 20 made of a rigid metal or the like. Reference numeral 21 denotes a female cap consisting of the shield jacket 20, the conductive layer 19, the insulating layer 18, the fixing metal fitting 15, and the fixing washer 11. As described above, this female cap 21 has a connecting conductor 1 extending from the approximate center of its recess 21a. stands out. 22 is an annular protrusion projecting from the shield jacket 20 at the top of the female cap 21;
3 is a pin protruding from both sides of the outer circumference of the annular projection 22; 24 is a conductive layer buried in the insulating layer 18 in the annular projection 22; the conductive layer 24 is not in contact with the conductive layer 19; First, the inside of this annular protrusion 22 is exposed to the outside. 25 is this annular protrusion 22
A conductive cap made of conductive rubber that is placed over the conductive cap 25. Key-shaped locking grooves 25 are provided on both sides of the conductive cap 25.
a, and cover the annular protrusion 22 with the pin 2.
3 into this locking groove 25a and attach the conductive cap 25.
When the conductive cap 25 is turned, the annular protrusion 2
2 is locked. 25b is a string connecting the conductive cap 25 and the female cap 21. Reference numeral 26 denotes an outer circumferential threaded portion at the other end of the connection conductor 1, 27 a male cap screwed onto the outer circumferential threaded portion 26, and this male cap 27 is attached to the nut metal fitting 2 having an inner circumferential threaded portion.
An insulating layer 29 is integrally molded on the outer periphery of 8, and a conductive layer 30 and a shield jacket 31 made of a rigid metal or the like are sequentially provided on this outer periphery.
The male cap 27 has a nut portion 27a at its outer top.

Numeral 32 denotes a number of branch bodies crowned in a skewered manner on this connecting conductor 1, 33 denotes a compressed conductor of each branch body 32,
This compressed conductor 33 has a through hole 34 at one end,
The other end has a compression hole 35. Reference numeral 36 denotes a multipolar ring drive contact fitted into the through hole 34. This contact 36 has a large number of contact pieces 38 arranged in a ring shape around the outer periphery of the support tube 37, and the outer end of each contact piece 38 is arranged in a ring shape. The support tube 37 is made to protrude outward, and a spring band 39 is provided on the outer periphery of each of these contact pieces 38.
A retaining ring 40 is provided to prevent it from coming off from the through hole 34. 41 is a core wire 41 inside the compression hole 35.
42 is an insulating layer provided on the outer periphery of the compressed conductor 33, and this insulating layer 42 reaches the ends of the branch cable 41 and is integrally molded therewith. The insulating layer 42 forms a recess 43 on one side of the opening of the through hole 34, the inner periphery tapering toward the periphery of the opening.
In addition, on the other side of the opening, the through hole 3
4, and a convex portion 44 having a tapered outer periphery is formed on the outer periphery of the tip. 45 is a spacer provided between the outer circumference of the end of the branch cable 41 and the inner circumference of the insulating layer 42; 46 is the concave portion 43 and the convex portion 4;
A conductive layer provided on the outer periphery of the insulating layer 42 except for 4, 47 a semiconductive tape wound from the end of the conductive layer 46 at the end of the branch cable 41, and 48 a semiconductive tape 47
The ground wire 49 is connected to the semi-conductive tape 47.
The waterproof tubes 50 covered on the outer periphery are presser tapes wrapped around the upper and lower ends of these waterproof tubes 49.

Reference numeral 54 denotes a connection portion cover provided around the outer periphery of the joint portion of each branch body 32.

This embodiment has the above-described configuration, and as shown in FIG. The convex portions 44 of the branch bodies 32 fit together, and in this way, the adjacent branch bodies 32
The male caps 27 are fitted into the recesses 43 of the branch body 32 at the left end. Then, when the male cap 27 is tightened, the female cap 21 at the other end is biased against the inside of the connecting conductor 1, and the above-mentioned fitting parts are pressurized by the caps 21 and 27 on both sides, making them more tightly fitted. do.

In the above embodiment, the connection conductor 1 into the hole 2,
The second method of inserting the mandrel 3 provided with the spring spring 7
Although the explanation is not limited to this, for example, as shown in FIG. 7, the spring 7' is made of a memory alloy, the shape under certain conditions is memorized, and this is deformed into the shape shown in FIG. 7A. As shown in FIG.
There is also a method of returning the spring spring 7 to its original shape.

Further, since the large number of branch bodies 32 are rotatably supported on the outer periphery of the connecting conductor 1, each branch body 32 can be set at any desired angle, as shown in FIGS. 8 and 9. Of these, the one in Fig. 9 is for each branch body 32.
, a large number of rods 52 passed between both side plates 51
It is placed on top and supported, and FIG. 10 is a plan view thereof.

(Effects of the Invention) The present invention has the above configuration, and the outer periphery of the connecting conductor between the female cap and the male cap is applied by the pressing force of the female cap due to the force of the spring inserted in the connecting conductor. Since the insulation creeping surfaces of the plurality of crowned branch bodies are pressurized, normal insulation strength is always maintained. Furthermore, since this spring spring is inserted inside the connecting conductor, it is not affected by current, voltage, or wind and rain, so the characteristics of the spring spring are maintained well over a long period of time. In addition, since each branch body is pivotally supported by the rod-shaped connecting conductor, each branch body can be positioned at any desired angle.

[Brief explanation of drawings]

Fig. 1 is a partially sectional side view of the present invention, and Fig. 2 A, B, and C are the steps for inserting a mandrel around which a spring spring is wound into the hole of the connecting conductor of the present invention, and attaching a fixing washer and a fixing metal fitting. FIG. 3 is a partially sectional side view showing the connecting conductor, female cap, and male cap of the present invention, FIG. 4 is a sectional view taken along line A-A in FIG. 3, and FIG. FIG. 6 is a partial cross-sectional side view of the compressed conductor of the branch body of the present invention, and FIGS. An explanatory diagram showing another embodiment in which a wound mandrel is inserted, FIG. 8 is a front view showing the usage state of the present invention, FIG. 9 is a front view showing another usage state of the invention, and FIG. 10 is the same. FIG. In the figure, 1 is the connection conductor, 2 is the hole, 3 is the core, and 7
is a spring spring, 11 is a fixed washer, 15 is a fixing metal fitting, 21 is a female cap, 25 is a conductive cap, 27 is a male cap, 32 is a branch body, 34 is a through hole, 36 is a multipolar ring drive contact, 41 is a branch cable.

Claims (1)

[Claims] 1. A mandrel protruding from the inside of the female cap is slidably inserted into a hole drilled in one end face of a rod-shaped connecting conductor, and a spring spring is attached to the mandrel that always applies a force to draw the mandrel into the hole. A connecting conductor is provided in the hole, and the connecting conductor is passed through the through hole of a plurality of branch bodies having a multipolar ring drive contact on the inner periphery of the through hole and a connecting part for connecting a branch cable at one end to connect each of the contacts. A conductor for a multi-circuit branch body, characterized in that the conductor is brought into contact with the conductor and branched into each branch body, and a male cap is screwed onto the other end of the connecting conductor by pressing the female cap and the branch bodies together. .