JPS60212709A - Connecting part of electro-optical composite cable - Google Patents

Abstract

PURPOSE:To prevent an optical cable core from being damaged in case of executing its connection by connecting the optical cable core by drawing it out to the outside of a protective sleeve, and also dividing the protective sleeve into three parts. CONSTITUTION:In a state that an intermediate sleeve 13 is drawn back and positioned to the right side of an electric cable core connecting part 7, an optical cable core 9a of the left cable is drawn out to the outside of the intermediate sleeve 13 through a leading-out tube 31a. According to this method, a distance between the end of a housing 3a and the end of the leading-out tube 31a can be taken large, therefore, the optical cable core 9a can be drawn out to the outside of the intermediate sleeve 13 without bending it forcibly. An optical cable core 9b of the right cable is made to pass through a leading-out tube 31b and drawn out to the outside of the intermediate sleeve 13. Subsequently, the intermediate sleeve 13 is positioned in the center, and a left sleeve 15 and a right sleeve 17 are drawn back and connected airtightly. Also, the left end of the sleeve is connected airtightly to the housing, the optical cable core 9a and 9b are connected, and thereafter, a protective cover is placed on them.

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 connection section of a type that includes a protective sleeve for connecting the jackets of the composite cable. It is about improvement.

[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 until the connection of both cable cores is completed,
Connections cannot be sealed with protective sleeves. 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. Especially when connecting a composite cable with an optical cable core inserted into the OF cable,
Even after 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 oil must continue to be poured during that time, which increases the amount of oil used and causes problems. It's the economy.

For this reason, recently, consideration has been given to pulling the optical cable core out of the protective sleeve and connecting the optical cable core outside the protective sleeve.

However, with this method, a considerable length of the optical cable core must be pulled out through a small hole in the middle of the protective sleeve, which may cause the optical cable core to become tangled or excessively bent within the protective sleeve, or to cause damage to the ladder. There is a risk of damage to the optical cable core. This risk is particularly high when the optical cable core has a high rigidity and has an FRP coating or a metal coating.

[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 connection part for an electric/optical composite cable in which there is no risk of damage to the optical cable core when the optical cable core is pulled out of the protective sleeve for connection. Our goal is to provide the following.

[Structure of the invention]

The connection part of the electric/optical composite cable of the present invention that achieves the above object has a protective sleeve connecting the outer sheath of the electric/optical composite cable, an intermediate sleeve having flanges at both ends, and an intermediate sleeve with flanges formed at both ends, and a a left-hand sleeve whose right end is connected to the jacket of the right cable to the left-hand flange of said intermediate sleeve; and a right-hand sleeve whose right end is connected to the jacket of the right cable and whose left end is connected to the right-hand flange of said intermediate sleeve. The outer diameter of the intermediate sleeve is smaller than the inner diameter of the right end side of the left sleeve and the left end side of the right sleeve, the electrical cable core of the cable is connected inside the protective sleeve, and the optical cable core is connected inside the protective sleeve. [Embodiment] Fig. 1 shows an embodiment of the connecting part of the present invention. la, lb are optical/electrical composite cables to be connected, 3a
, 3b is its outer jacket, 5a, 5b are electric cable cores (the cable lb side is not shown), 7 is its connection part, 9a, 9
b is the optical cable core containing the optical fiber, 1 is the connection part, 13 is the intermediate sleeve, 15 is the left sleeve, 1
7 is the right sleeve.

The intermediate sleeve 13 has integrally formed flanges 18a and 18b at both ends thereof. The left sleeve 15 consists of a main sleeve 19 and a terminal sleeve 21, both of which are airtightly connected at a connecting portion 23. Left side sleeve 15
The left end is hermetically connected to the left cable sheath 3a, and the right end is hermetically connected to the left flange 18a of the intermediate sleeve. The right sleeve 17 similarly consists of a main sleeve 25 and a terminal sleeve 27, both of which are airtightly connected at a connecting portion 29. The right end of the right sleeve 17 is hermetically connected to the right cable sheath 3b, and the left end to the right flange 18b of the intermediate sleeve. In other words, outer cover 3
The protective sleeve connecting between a and 3b is intermediate sleeve 1.
3. Consists of a left sleeve 15 and a right sleeve 17,
The internal space is in a sealed state. The electrical cable core connection 7 is placed within this protective sleeve.

The outer diameter of the intermediate sleeve 13 is the same as that of the main sleeves 19 on both sides thereof.
The inner diameter of the flanges 18a, 1 is smaller than that of the flanges 18a, 1.
8b located inside the main sleeve 19.25, the extraction pipes 31a and 31b are hermetically passed through, respectively. The optical cable cores 9a, 9b are drawn out of the intermediate sleeve 13 through the lead-out pipes 31a, 31b, respectively, and connected there. Reference numeral 11 indicates the connecting portion, and the extra connecting length is stored by wrapping it around the outer periphery of the intermediate sleeve 13. Outlet tube 31a within main sleeve 19.25.

An optical cable core 9a is provided at each end of the optical cable 31b.

Seals 33a and 33b made of lead or putty are applied to the outer periphery of 9b. Further, a protective cover 35 is placed over the outer peripheries of the flanges 18a and 18b so as to straddle them, thereby protecting the optical cable core connecting portion 11 and the remaining connection length.

The connection portion of the composite cable as described above is assembled as shown in FIGS. 2-4.

First, the outer sheaths of both cables are stripped off, and the left cable is inserted through the left sleeve, and the right cable is inserted through the right sleeve and intermediate sleeve, and the electrical cable cores are connected. Next, as shown in FIG. 2, with the intermediate sleeve 13 pulled back and positioned to the right of the electrical cable core connection section 7, the optical cable core 9a of the left cable is passed through the pull-out pipe 31a, and the intermediate sleeve 13 is opened. Pull it out. In this way, the pull-out pipe 31 can be pulled out from the end of the jacket 3a.
Since the distance to the a end can be increased, the optical cable core 9
A can be pulled out of the intermediate sleeve 13 without forcibly bending. Next, as shown in FIG. 3, while the intermediate sleeve 13 is moved and positioned to the left of the electrical cable core connection section 7, the optical cable core 9b of the right cable is passed through the pull-out pipe 31b, and the intermediate sleeve 13 Pull it out. At this time as well, since the distance from the end of the jacket 3b to the end of the lead-out pipe 31b can be kept large, the optical cable core 9b is not subjected to excessive bending.

Next, as shown in FIG. 4, the intermediate sleeve 13 is positioned at the center, and the seals 33a are attached to the ends of the extraction pipes 31a and 31b.
, 33b, the left sleeve 15 and the right sleeve 17 are pulled back to remove the flanges 18a, 18, respectively.
Connect airtightly to b.

Further, the left end of the left sleeve 15 is airtightly connected to the outer sheath 3a, and the right end of the right sleeve 17 is connected to the outer sheath 3b, respectively.
If the optical cable cores 9a and 9b are connected and then covered with a protective cover, the connection portion shown in FIG. 1 will be obtained.

In the above embodiment, the left sleeve and the right sleeve are
Although each sleeve is composed of two sleeves, a main sleeve and a terminal sleeve, these may be integrated. Furthermore, although the optical cable core is pulled out of the intermediate sleeve through the pull-out tube, the pull-out tube may be omitted and the optical cable core may be pulled out through a hole formed in the flange.

(Effect of the invention〕

Claims (1)

[Claims] A protective sleeve that connects the outer jacket of an electrical/optical composite cable is made of an intermediate sleeve with flanges formed on both ends,
a left sleeve whose left end is connected to the jacket of the left cable and whose right end is connected to the left flange of said intermediate sleeve; and whose right end is connected to the jacket of the right cable and whose left end is connected to the right flange of said intermediate sleeve. a right sleeve, the outer diameter of the intermediate sleeve is smaller than the inner diameter of the right end side of the left sleeve and the left end side of the right sleeve, and the electrical cable core of the cable is connected inside the protective sleeve; A connection part for an electric/optical composite cable, characterized in that the optical cable core passes through the flange and is pulled out of the intermediate sleeve, and is connected there.