JPH0725764Y2 - Optical cable connector mounting part - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to improvement of a connector mounting portion of an optical cable.

[Prior Art] As a method of attaching a connector to an optical cable, the following method is generally adopted. That is, as shown in FIG. 2, a plurality of optical fiber single-cord cords 2 are twisted around the tension member 1, and a connector is attached to the optical cable having a structure in which a holding winding tape 3 and a cable sheath 4 are provided on the outside thereof. In this case, as shown in FIG. 3, the tension member 1, the press-wrap tape 3 and the cable sheath 4 are removed by leaving the optical fiber single core cord 2 for the length from the cable end to the ferrule 6 of the connector 5 and then the cable sheath. The end of 4 is clamped by a cable clamp 8 via a rubber bush 7 and the connector 5 is mounted.

[Problems to be Solved by the Invention] In the connector mounting portion by the above method,
Since the optical fiber single-cord cord, tension member, and press-winding tape are not directly fixed to the connector, the cable sheath may shrink due to temperature changes at the location where the optical cable is installed, and repeated bending applied to the optical cable may cause
The optical fiber single-cord cord may protrude from the end surface of the cable sheath together with the tension member and the press-wrap tape (portion L in FIG. 3), and the optical fiber single-cord cord may be excessively bent inside the connector to break the optical fiber. there were.

Therefore, the present invention is intended to eliminate the above drawbacks,
Prevents optical fiber single-core cords, tension members, and even press-wrap tape from protruding from the cable sheath end surface due to contraction of the cable sheath and bending of the cable,
An object of the present invention is to provide a connector mounting portion of an optical cable in which breakage of an optical fiber due to this is prevented.

[Means for Solving the Problems] In the connector attaching portion of the optical cable according to the present invention, an inner sleeve is inserted into the inner circumference of the cable sheath, and the inner sleeve, the tension member, the optical fiber single-cord cord, and the presser-wrapping tape are adhesively attached. And a cable sheath and an inner sleeve are fastened together by a cable clamp via a comb bush.

[Operation] In the connector attaching portion of the optical cable according to the present invention, the inner sleeve inserted into the inner circumference of the cable sheath, the optical fiber single-cord cord, the tension member, and the press-wrap tape are integrally fixed by an adhesive and the cable sheath Since the inner sleeve and the inner sleeve are tightened by the cable clamp via the rubber bush, the end portion of the cable is fixed to the connector, so that the tension member and the press-wrapping tape including the optical fiber single-cord cord end face of the cable sheath. It is possible to prevent the optical fiber from sticking out of the optical fiber and thus prevent the optical fiber from being broken.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a connector mounting portion according to an embodiment of the present invention. In the figure, an inner sleeve 9 is inserted into the inner circumference of the cable sheath 4, and the inner sleeve 9 and the optical fiber single-core cord 2, the tension member 1 and the holding tape 3 are integrated by an adhesive 10 which is curable at room temperature. Is stuck to. The cable sheath 4 and the inner sleeve 9 are clamped by a cable clamp 8 via a rubber bush 7. Here, the inner sleeve 9 is preferably formed of a metal such as brass in order to improve the adhesiveness with the adhesive 10 and the tightening performance with the cable clamp 8. Further, the adhesive 10 is preferably an epoxy resin in consideration of adhesiveness and curability.

[Advantages of the Invention] As described in detail above, according to the connector mounting portion of the present invention, the inner sleeve is integrally fixed to the optical fiber single-cord cord, the tension member, and the press-winding tape with an adhesive, and the inner sleeve is Since it is tightened by the cable clamp together with the cable sheath via the rubber bush, all the cable ends are fixed together with the connector, and even if the temperature changes or is bent, the optical fiber single-core cord as well as the tension member and the press-winding member are wound. It is possible to prevent the tape from protruding from the end surface of the cable sheath and thus prevent the optical fiber from being broken.

[Brief description of drawings]

1 is a sectional view of a connector mounting portion of an optical cable of the present invention, FIG. 2 is a sectional view of an optical cable used in the present invention,
FIG. 3 is a sectional view of a conventional connector mounting portion. 1 ... Tension member 2 ... Optical fiber single-cord cord 3 ... Holding tape 4 ... Cable sheath 7 ... Rubber bush 8 ... Cable clamp 9 ... Inner sleeve 10 ... Adhesive

Claims (1)

[Scope of utility model registration request] 1. A plurality of optical fiber single-cord cords are twisted around a tension member, and a press-winding tape layer and an extruded coating layer of a cable sheath are provided on the outer periphery of the tension member, at a connector mounting portion of an optical cable. Insert the inner sleeve into the inner circumference, and integrally fix the inner sleeve, the tension member, the optical fiber single-cord cord, and the press-wrap tape with an adhesive, and tighten the cable sheath and inner sleeve with a cable clamp via a rubber bush. The connector mounting part of the optical cable characterized in that