JPS63180915A - Terminal part for optical cable - Google Patents

Abstract

PURPOSE:To efficiently perform branch connecting operation in a short time by coupling a connector housing with the tips of respective flexible pipes and supporting and optical connector fitted for the tips of optical fiber cores in each group in the connector housing. CONSTITUTION:An optical core unit 3 is branched previously at the terminal part 5 of an optical cable 1 and branching operation is not necessary at an actual site. The optical connector 11 is connected previously to branched optical fiber cores 2 in each group, so connections with optical fiber cores of an optical cable of a next section are easily made at the actual site. Respective optical connectors 11 are put in the connector housing 9, which is coupled with the opposite connector housing, so the connection box which contains the optical connector 11 need not be installed at the actual site. The optical fiber cores 2 in respective groups are put in flexible pipes 7 respectively, so they are freely bent and easily positioned for the opposite connected cores. Consequently, the operation at the actual site is only the connection of connectors and the actual site operation is performed efficiently in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a terminal portion of an optical cable in which an optical fiber unit is branched into a plurality of optical fiber units at the terminal.

(Prior art) When installing an optical cable in which an optical fiber unit made up of multiple optical fiber cores is built into a sheath, if it becomes necessary to branch, conventionally, the branching work and branching have been carried out on-site. work was being carried out to connect the optical cable that had been installed with the optical cable in the adjacent section.

(Problems to be Solved by the Invention) However, when branching optical cables and connecting optical cables are performed on-site, there are problems in that the workability is poor and the working time on-site becomes long.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical cable terminal section that allows on-site branch connection work to be performed efficiently and in a short time.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained with reference to the drawings corresponding to the embodiments. At the terminal portion 5 of the optical cable 1 in which the optical fiber unit 3 is built into the sheath 4, the optical fiber unit 3 is led out from the end of the sheath 4, and the optical fiber unit 3 is guided out from the base of the inter-plane optical fiber unit 3. A branch housing 6 is mounted on the side with one end thereof fixed to the sheath 4, and the optical fiber unit 3 is branched into a plurality of sets of optical fiber cores 2 within the branch housing 6, with each distal end side being connected to the sheath 4. Each set of optical fiber cores 2 guided out of the branch housing 6 is housed in a separate flexible tube 15, and the proximal end of each flexible tube 15 is connected to the branch housing 6. 6, each of the flexible tubes 15
Connector housings 17 are connected to the tips of each of the connector housings 17, and optical connectors 25 attached to each tip of each set of optical fiber cores 2 are supported in the connector housings 17, respectively. .

(Function) If the optical fiber unit 3 is branched in advance at the terminal portion 5 of the optical cable 1 in this way, there is no need for branching work at the site. In addition, since the optical connector 25 is connected in advance to each branched optical fiber core 2, the work of connecting the optical fiber core of the next section of optical cable to the optical fiber core at the site is easy! J I
It becomes n. Each optical connector 25 has a connector housing 17
Since the connector housing 17 is used to connect the connector housing 17 to a mating connector housing, there is no need to install a junction box housing the optical connector 25 and the like on-site. Since each set of optical fiber core wires 2 is housed in a flexible tube 15, they can be bent freely and can be easily aligned with respect to the connection partner.

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

The optical cable 1 has a structure in which an optical fiber unit 3 made up of a plurality of optical fiber cores 2 is housed in a sheath 4 made of plastic snacks or the like. The optical cable 1
In the terminal portion 5 of the sheath 4, the end portion of the sheath 4 is
The optical fiber unit 3 is drawn out to a predetermined length by peeling off or the like. A branch housing 6 is attached to the lead-out base side of the optical fiber unit 3. The proximal end of the branch housing 6 is connected to the distal end of the sheath 4 by adhesive or the like.

The optical fiber unit 3 is branched into two sets of optical fibers 2 within the branch housing 6. Each set of optical fiber cores 3 is led out from each core AM through hole (not shown) at the tip of the branch housing 6 . Each set of optical fiber cores 2 led out from the branch housing 6 is accommodated in a separate flexible tube 7, respectively. The proximal end of each flexible tube 7 is connected to the branch housing 6 by a connecting connector 8. A connector housing 9 is connected to the tip of each flexible tube 7 by a connecting connector 10, respectively. An optical connector 11 is supported inside the front end side of the connector housing 9 without being handled. The optical connector 11 is attached to the optical fiber core 1i12.

After the optical cable 1 is installed, the terminal section 5 of the optical cable 1 is constructed such that one set of optical fiber core wires 2 is connected to the optical fiber core wire of an adjacent optical cable section (not shown) with an optical connector 11 and a connector housing 9. The optical fiber core wires 2 of the other set are connected to a drop-in optical fiber cable (not shown) via the optical connector 11 and the connector housing 9. Therefore, the work at the site is simply a connection work using a connector. Further, since the optical connector 11 bears the tension on the connector housing 9 and is also protected from external forces, there is no need to install and protect a junction box on-site.

(Effects of the Invention) As explained above, in the terminal part of the optical cable according to the present invention, since the optical fiber unit is branched in advance at a factory, etc.,
This has the advantage of eliminating the need for on-site branching work. In addition, since an optical connector and a connector housing that accommodates the optical connector are attached to the branched optical fiber core wire, on-site work is simply a matter of connecting connectors, which has the advantage of allowing on-site work to be done efficiently and in a short time. There is. Furthermore, since each optical connector is housed in a connector housing, and the connector housing protects it from tension, external force, and rainwater, there is an advantage that no work is required for attaching the connection box to the 1A field. Furthermore, in the present invention, each set of branched optical fiber core wires is housed in a flexible tube, so by utilizing flexibility, it is possible to easily match the order with the connection partner. , n.There is an advantage that the connection can be easily performed by moving it to a position where it will not get in the way.

[Brief explanation of the drawing]

The drawing is a plan view of one embodiment of the terminal portion of the optical cable according to the present invention. 1... Optical cable, 2... Optical fiber core wire, 3...
・Optical fiber unit, 4... Sheath, 5... Terminal part,
6... Branch housing, 7... Flexible tube, 9... Connector housing, 11... Optical connector.

Claims (1)

[Claims] In a terminal portion of an optical cable in which an optical fiber unit constituted by a plurality of optical fiber core wires is built in a sheath, the optical fiber unit is led out from the end of the sheath, and the optical fiber unit is led out. A branch housing is attached to the base side with one end fixed to the sheath, and the optical fiber unit is branched into a plurality of sets of optical fiber cores within the branch housing, with each distal end extending outside the branch housing. Each set of optical fiber cores guided out from the branch housing is housed in a separate flexible tube, and a proximal end of each flexible tube is connected to the branch housing,
A connector housing is connected to the tip of each of the flexible tubes, and an optical connector attached to each tip of each set of optical fiber cores is supported in the connector housing. The terminal part of the optical cable.