JPH0419778B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a connection section of a composite cable having an electric cable core and an optical cable core, and particularly to a type of connection having a connection section protection sleeve that connects the jackets of the composite cable. This is related to the improvement of the department.

[Prior art]

Normally, when connecting electric/optical composite cables, the connecting portion of the electric cable core and the connecting portion of the optical cable core are housed together in a protective sleeve. However, when assembling such a connection, the connection of the electrical cable core and the connection of the optical cable core are performed in separate processes, so the connection must be sealed with a protective sleeve until both cable cores are connected. I can't. For this reason, it takes time to open the cable end, make the connection, and cover and seal the cable with a protective sleeve, which is undesirable in that it increases the chance that moisture or the like will enter the cable. In particular, when connecting a composite cable containing an optical cable core to an OF cable, even if the connection of the OF cable core is completed, the protective sleeve cannot be covered until the connection of the optical cable core is completed, so do not use oil during that time. This means that the oil must continue to flow, which increases the amount of oil used and is uneconomical.

Further, in such a connection part, when performing maintenance and inspection of the connection part of the optical cable core, it is necessary to open the protective sleeve, but this is not preferable because there is a risk that moisture or the like may enter the connection part. especially
Opening the protective sleeve of an OF cable, etc. is a large-scale operation as it involves oil spillage, and there is also the risk of voids penetrating into the oil, making it almost impossible.

[Purpose of the invention]

In view of the problems of the prior art as described above, an object of the present invention is to provide a connecting portion of an electric/optical composite cable that allows easy maintenance and inspection of the connecting portion of the optical cable core and also facilitates the assembly work of the connecting portion. It is about providing.

[Structure of the invention]

The connecting portion of the electric/optical composite cable of the present invention that achieves the above object includes a drum consisting of a winding drum with a smaller diameter and flanges at both ends of the protective sleeve in the middle of the protective sleeve that connects the outer sheaths of both cables. There is a
The electrical cable core of the composite cable is connected inside the protective sleeve and the drum, and the optical cable core is drawn out to the outer periphery of the body through the collar of the drum and connected there. .

〔Example〕

The drawing shows an embodiment of the invention, which is a composite cable connection with an optical cable core inside the OF cable.

In the figure, 1a and 1b are optical complexes to be connected.
OF cables, 3a and 3b are terminal protection sleeves attached to the ends of their jackets with lead work, etc., 5a
is an OF cable core (the cable 1b side is not shown), 7 is its connection part, 9a and 9b are optical cable cores containing optical fibers, 11 is its connection part, and 13a and 13b are cylindrical main protective sleeves. ,
15 is a drum.

The drum 15 includes a cylindrical winding drum 17 and flanges 19a and 19b fixed to both ends thereof. Drum 15 and main protective sleeves 13a, 13 on both sides thereof
b are connected by tightening the respective flanges and flanges with screws, and the main protective sleeve and terminal protective sleeves 13a and 3a, 13b and 3
b are connected by tightening the respective flanges with screws. In other words, the internal space constituted by the drum 15, the main protective sleeves 13a, 13b, and the terminal protective sleeves 3a, 3b is sealed from the outside, and the connecting portion 7 of the OF cable core is arranged in this sealed space, and the is immersed in

The diameter of the winding barrel 17 of the drum 15 is the same as that of the main protective sleeve 1.
3a, 13b, and the main protective sleeves 13a,
Outlet pipes 21a and 21b penetrate in the direction of the cable into the inner portion of 13b, and are fixed with lead work or the like. Optical cable core 9
a and 9b are drawn out to the outer periphery of the winding drum 17 of the drum through the draw-out pipes 21a and 21b, respectively, and are connected there. Reference numeral 11 indicates the connecting portion, and the extra length of the connecting portion is stored by winding it around the outer periphery of the winding drum 17. A seal 23a made of lead or putty is applied from the end of the lead-out pipe 21a inside the main protective sleeve 13a to the outer periphery of the optical cable core 9a. The same applies to the inside of the other main protective sleeve 13b. In addition, both drum flange 19a, 19b
A protective cover 25 is placed over the outer periphery of the optical cable cores 9a and 9b.
The connecting portion 11 and its extra length are protected.

In this way, according to this embodiment, since the drum with a smaller diameter is placed in the middle of the protective sleeve, the optical cable core can be easily wrapped by utilizing the difference in diameter between the protective sleeve and the winding body of the drum. It becomes possible to pull out the optical cable core to the outer periphery of the drum, and this also makes it possible to arrange the connection part of the optical cable core in an external space completely separated from the connection part of the OF cable core. Therefore, there is an advantage that maintenance and inspection of the connecting portion of the optical cable core can be easily performed without affecting the connecting portion of the OF cable core. Also, when assembling the connection part,
Since the cable core connection and its sealing can be performed first and the optical cable core connection can be performed afterwards without being subject to time constraints, there is an advantage that the connection work is easier to perform.

In the above embodiment, the protective sleeve is composed of the main protective sleeve and the terminal protective sleeve, but they can also be constructed as one piece.

Further, although the optical cable core is drawn out to the outer periphery of the drum through a draw-out tube, this pull-out tube may be omitted and the optical cable core may be drawn out through a hole formed in the flange of the drum. However, the optical cable core can be more securely protected by providing a pull-out pipe.

Also, although the drum was placed exactly in the center of the protective sleeve, it could also be placed off to one side. In this case, shifting the position of the drum in the longitudinal direction of the connection section and the position of the OF cable core connection section is effective in reducing the outer diameter of the connection section.

In addition, in the above example, an optical cable core was inserted.
Although the connection part of the OF cable has been described, the present invention is equally applicable to the connection part of other power cables including optical cable cores, where the connection part of the power cable core is covered with a protective sleeve. It is. Furthermore, the present invention can be similarly applied to a connecting portion of a telecommunications cable including an optical cable core.

〔Effect of the invention〕

As explained above, according to the present invention, since the drum with a smaller body diameter is placed in the middle of the protective sleeve that connects the outer sheaths of the electric/optical composite cable, the optical cable core is This makes it possible to pull out the optical cable core to the outer periphery of the drum without any difficulty, and this also makes it possible to place the connection part of the optical cable core in a space completely separated from the connection part of the electrical cable core. There is an advantage that maintenance and inspection of the connection part can be easily performed without affecting the connection part of the electric cable core. Furthermore, when assembling the connection part, the connection part of the electric cable core can be sealed before connecting the optical cable core, which has the advantage of making the connection work easier.

[Brief explanation of drawings]

The drawing is a partially cutaway front view showing a connecting portion of an electric/optical composite cable according to an embodiment of the present invention. 1a, 1b...Optical composite OF cable, 3a, 3
b...Terminal protection sleeve, 5a...OF cable core, 7...OF cable core connection part, 9a, 9
b... Optical cable core, 11... Optical cable core connection part, 13a, 13b... Main protection sleeve, 1
5... Drum, 17... Winding drum, 19a, 19b...
...Brim, 21a, 21b... Pull-out pipe, 25... Protective cover.

Claims (1)

[Claims] 1. A drum consisting of a winding drum with a smaller diameter and flanges at both ends is provided in the middle of a protective sleeve that connects the outer sheaths of the electric/optical composite cable. An electric/optical composite cable characterized in that the electric cable core is connected inside the protective sleeve and the drum, and the optical cable core is drawn out to the outer periphery of the winding drum through the flange of the drum and connected there. Connection part. 2. The connecting portion according to claim 1, which has a protective cover that covers the drum by straddling the outer periphery of both flanges. 3. In the connecting portion according to claim 1, a draw-out pipe is fixed to a portion of the collar of the drum located inside the sleeve, and the optical cable core is fixed therein. It is drawn out to the outer periphery of the winding drum through the