JP2553302Y2 - Low voltage cable connection - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting portion of a branch line of a low-voltage trunk cable with a prefabricated branch line used in a building, an apartment house, and the like.

[0002]

2. Description of the Related Art As an example of a low-voltage trunk cable with a prefabricated branch line, there is a "cable line structure in a low-voltage trunk line" disclosed in JP-A-64-38974. The connection part in the branch line of the conventional low-voltage main cable has no lock mechanism, or has a structure in which a cap nut is provided on the connection part main body as a lock mechanism and screwed.

[0003] Generally, a low-voltage trunk cable with a prefabricated branch line is pulled into an electric shaft of a building or the like and laid. It is necessary to make the connection part provided as small as possible. Therefore, it is difficult to provide a lock mechanism to reduce the outer diameter of the connecting portion, and there is a problem that the cap nut type lock mechanism has an excessively large outer diameter and does not pass through the floor penetrating portion.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a connecting portion of a low-voltage cable in which the outer diameter of the connecting portion is reduced to improve workability. It is connected by apt-menu lip contact method, from the tip of the male terminal of the tulip contact
A collar with a rectangular cross section is attached to the annular groove formed at the back.
On the other hand, cut into an annular groove formed on the inner peripheral surface of the female terminal.
A triangular spring ring is provided.
By inserting the female terminal into the female terminal.
Ring is locked by dropping the annular groove of the male terminal.
State, the ring on the cover provided in the female terminal shape
That the cover was attached .

[0005]

FIG. 1A is a side view showing an upper half longitudinal section of a specific example of a connecting portion of a low-voltage cable according to the present invention. As shown in the drawing, the conductor 11 of one low-voltage cable 1
A male terminal 2 forming a tulip contact is attached to the tip of the low-voltage cable 1.
The female terminal 3 is attached to the tip of the male terminal 2 and the male terminal 2 and the female terminal 3 are fitted to each other to form a connection portion of the conductor 11. A lock mechanism 6 is formed at a fitting portion between the male terminal 2 and the female terminal 3.

A cover A4 is mounted outside the male terminal 2 and a cover B5 is mounted outside the female terminal 3. The two parts are fitted to each other at their tips to insulate and protect the internal conductor connection. Cover B5
On the upper side, for example, a hard plastic made with an opening 71 in a part of the circumference as shown in FIG. Is mounted to prevent the lock mechanism 6 from being easily released. The other ends of the cover A4 and the cover B5 are located on the low-voltage cable 1, and the watertight structure 8 is formed by a self-sealing tape and a protective tape.
It is connected to the.

[0007] A thermo label 9 is attached to the surface of the cover A4 so that an abnormal temperature rise due to improper connection of the connection portion, overcurrent application or the like can be checked. A charge indicator 10 is attached to the low-voltage cable 1 near the connection so that the charging state of the cable can be checked at a glance and safe insertion and withdrawal operations can be performed. This charge indicator 10 may be attached to the connection part main body, but in order to reduce the connection part outer diameter,
Preferably, it is attached to the low-voltage cable 1.

FIG. 2 is an explanatory view of the lock mechanism of the present invention and its operation. As shown in FIG. 2A, an annular groove 21 is formed behind the tip of the male terminal 2, and a collar 22 is mounted in the annular groove 21. The width of the annular groove 21 is larger than the width of the collar 22 so that the collar 22 can move in the annular groove 21 in the length direction of the male terminal 2. On the other hand, the female terminal 3 has an annular groove 31 formed on the inner peripheral surface thereof, and a spring ring 32 is mounted in the annular groove 31.

The fitting of the male terminal 2 and the female terminal 3 is shown in FIG.
As shown in (b), the male terminal 2 is inserted into the female terminal 3 in the direction of the arrow in the figure. At this time, the spring ring 32 of the female terminal 3
Drops into the annular groove 21 of the male terminal 2 and is locked. In this state, if the ring-shaped collar 7 is mounted in the gap between the cover B5 and the tip of the cover A4, the male terminal 2 cannot be further pushed in. Therefore, the above state is maintained, and the operation after laying is mistaken. Can be pulled out.

When the male terminal 2 is pulled out, first, the cover B
Remove the ring-shaped collar 7 mounted on the upper part. In this state, the male terminal 2 is further pushed in the direction of the arrow as shown in FIG. This opens the spring ring 32 and rides on the collar 22 of the male terminal 2. In this state, when the male terminal 2 is pulled in the direction of the arrow in the figure, the collar 22 on which the spring ring 32 rides can slide in the annular groove 21 to the right in the figure, and the male terminal 2 can be pulled out.

[0011]

As described above, according to the connecting part of the low-voltage cable of the present invention, the outer diameter of the connecting part can be reduced by connecting the conductor by the tulip contact method with the lock, and the conventional cap nut can be used. It can be about 70% of the formula, and the work of passing through the floor through opening in the electric shaft of a building or the like becomes easy. In addition, since a lock is not easily released outside the conductor connection portion, there is no possibility that the operation is mistakenly pulled out after the installation. Further, since the charge indicator is attached, safety at the time of attachment / detachment can be ensured.

[Brief description of the drawings]

FIG. 1A is a side view showing an upper half vertical cross section of a specific example of a connection portion of a low-voltage cable according to the present invention;
(B) is an explanatory view of a ring-shaped collar.

FIGS. 2A to 2D are explanatory views of the lock mechanism and its operation according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low voltage cable 2 Male terminal 3 Female terminal 4 Cover A 5 Cover B 6 Lock mechanism 7 Ring-shaped collar 8 Watertight connection part 9 Thermo label 10 Charge indicator

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Wakio Nishida 2-17, Shiba 2-chome, Minato-ku, Tokyo Sumitomo Electric Co., Ltd. Tokyo Internal Line Division (56) References JP-A-49-33189 (JP, A) JP-A-49-28877 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A low voltage cables with prefabricated branch line having a connecting portion in the middle of the branch cable are connected by a conductor apt Yuri <br/>-up contact method, the Chu
Formed behind the tip of the male terminal of the lip contact
The collar with a rectangular cross section is attached to the annular groove
Triangular springs in annular grooves formed on the inner peripheral surface of
A ring is provided, and the above male terminal is inserted into the female terminal
By inserting, the spring ring of the female terminal
Is locked by dropping into the annular groove of
Attach ring cover on cover provided on female terminal
Connection of low voltage cables, characterized in that the.