JPH0219762Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an optical cable terminal protection member with an optical connector.

Generally, in an optical cable communication system, a multi-core cable is used for multiple circuits by bundling and reinforcing a plurality of single-core optical fiber cords. There are a plurality of single-core optical cords at the tip of this multi-core cable, and an optical connector is attached to each of these optical cords.

This optical connector may be attached to each optical fiber single-core cord on-site as an on-site assembly type optical connector, or it may be attached to each optical fiber single-core cord at an optical connector manufacturing factory. Installing optical connectors at a factory provides a better working environment than installing optical connectors on-site, and allows for efficient assembly of high-performance optical connectors. Multi-core optical cables, which are made by bundling multiple single-core optical fiber cords with optical connectors attached at the factory, must be transported locally. Therefore, a member is required to protect the single-core optical fiber cord and optical connector. Furthermore, since this type of member is almost always disposable at the site, it needs to be easy to protect and inexpensive.

Conventionally, as shown in FIG. 1, this type of protection member includes a terminal end of an optical cable 3, a plurality of single optical fiber cords 1 extending from the terminal end, and an optical connector 1 attached to the tip of the optical fiber cord. As shown in FIG. 2, the optical cable end is covered with a hard vinyl chloride pipe 6, the cable side of the pipe is fixed with an adhesive tape 5, and the other end is covered with a cover 7. It was used covered with

However, since the spiral tube 4 shown in FIG. 1 expands and contracts in the cable axial direction, excessive force is applied to the optical fiber cord 2 and the optical connector 1
It is insufficient as a protective member. In addition, in the protection part of the structure shown in Fig. 2,
When attaching the hard vinyl chloride pipe 6 to the multi-core optical cable 3, it was impossible to fix it firmly enough, and the protective member did not bend, making it difficult to pack the cable and wire it in a narrow space. .

The purpose of the present invention is to eliminate the above-mentioned drawbacks, sufficiently protect the optical connector and optical fiber cord at the end of a multi-core optical cable from external forces, and provide flexibility to facilitate wiring in narrow spaces. Another object of the present invention is to provide an inexpensive optical cable terminal protection member with an optical connector that can be easily attached to the tip of a multi-core optical cable.

According to the present invention, in the protective member for protecting the extra length of the optical fiber cord coming out from the optical cable terminal and the optical connector fixed to the tip thereof, the outer peripheral surface forms continuous unevenness and is flexible. There is obtained an optical cable terminal protection member with an optical connector, which is made of a cylindrical member having a cylindrical shape and has a V-shaped notch at one end and a flat shape at the other end.

Since the present invention is flexible and has an uneven outer peripheral surface, it is easy to bend and facilitates wiring when passing an optical cable through a narrow space such as a conduit. Furthermore, since a V-shaped notch is formed at one end, the optical cable terminal can be securely protected regardless of the outer diameter of the cable.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

Figures 3a, 3a and 3c show an embodiment of the present invention, in which a is a front view, b is a right side view thereof, and c is a plan view of a seen from below. In the figure, reference numeral 8 denotes a tube-shaped member, and this tube-shaped member 8 is flexible and has continuous irregularities formed on its outer peripheral surface. Further, the right end of the tube-shaped member 8 has three V-shaped notches 9 deeply cut out at equal intervals, thereby forming the end portions 10a and 10.
b and 10c are formed. Furthermore, the left end is formed into a flat shape, and the flat part 11
A hole is made through the eyelet 12 approximately in the center. The flat portion 11 forms a tapered side toward its tip. The tip of this flat portion 11 may be sharpened.

FIG. 4 is a front view showing an example of the use of the embodiment shown in FIG. Indicates the status of protection. In order to achieve such a state, the optical connector 1 and the optical fiber cord 2 are first aligned in parallel, and then the optical connector 1, the optical fiber cord 2, and the tip of the optical cable are connected to the flexible tube-shaped member 8 of the present invention. The optical cable 3
The optical cable 3 and the tube-shaped member 8 are firmly fixed with adhesive tape 13. At this time, if the tube-shaped member 8 is molded from a transparent material, it is possible to fix the member 8 at a convenient position while looking at the optical connector 2 and optical fiber cord 2 inside the member 8. becomes.

The tube-shaped member 8 of this embodiment is flexible and has irregularities formed on the outer periphery, so it is highly flexible and can be used for laying optical cables in narrow places such as straight or curved conduits. Not only does this make it easier to use, but it also has the effect of providing sufficient protection against external compressive force and impact force. Furthermore, since there are three notches 9 at the rear end of the tube-like member 8, when fixing the member 8 to the optical cable 3, it can be securely fixed even if the outer diameter of the optical cable sheath changes. . Furthermore, a flat part 11 is formed at the tip, and an eyelet 12 is provided in the flat part, so that
If a wire or the like is passed through the hole, the optical cable 3 can be pulled along with the protective member, which has the effect of making wiring in narrow spaces easier. Furthermore, since airtightness is maintained, it is possible to prevent damage to cables or optical connectors due to rain, etc., even when construction is performed outdoors.

[Brief explanation of the drawing]

1 and 2 are a front view and a sectional view, respectively, showing a conventional optical cable terminal protection member with an optical connector, and FIGS. 3a, b, and c show an optical cable terminal protection member with an optical connector according to the present invention, and a is a front view, b is a right side view, c is a plan view, and Fig. 4 is a third
It is a front view which shows one example of use of a figure. 1...Optical connector, 2...Optical fiber cord,
3...Optical cable, 4...Spiral tube,
5... Adhesive tape, 6... Hard vinyl chloride pipe, 7... Cover, 8... Tube-shaped member of the present invention, 9... Notch, 10a, 10b, 10c...
...End part, 11... Flat part, 12... Eyelet.

Claims (1)

[Scope of utility model registration request] A flexible cylindrical member with a continuous uneven outer circumferential surface, which is used as a protective member for protecting the excess length of an optical fiber cord extending from the terminal end of an optical cable and an optical connector fixed to the tip thereof. An end protection member for an optical cable with an optical connector, characterized in that one end of the cylindrical member has a V-shaped notch and the other end has a flat shape.